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CN115914717A - CUVA HDR video playing method, device and equipment and readable storage medium - Google Patents

CUVA HDR video playing method, device and equipment and readable storage medium Download PDF

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Publication number
CN115914717A
CN115914717A CN202211369791.6A CN202211369791A CN115914717A CN 115914717 A CN115914717 A CN 115914717A CN 202211369791 A CN202211369791 A CN 202211369791A CN 115914717 A CN115914717 A CN 115914717A
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cuva
hdr
preset
image quality
code stream
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CN115914717B (en
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付华东
许福
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Shenzhen Skyworth RGB Electronics Co Ltd
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Shenzhen Skyworth RGB Electronics Co Ltd
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Abstract

The invention discloses a CUVA HDR video playing method, device and equipment and a readable storage medium, and relates to the technical field of display equipment. The CUVA HDR video playing method is applied to a display device, and comprises the following steps: acquiring a CUVA HDR software development toolkit and an original code stream; loading a CUVA HDR software development tool package, and decoding an original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream; according to the preset CUVA HDR image quality requirement, the display equipment is calibrated to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement; acquiring CUVA HDR image quality parameters of display equipment in a standard image quality display state; and controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR image quality parameter. The invention realizes the playing of CUVA HDR video.

Description

CUVA HDR video playing method, device and equipment and readable storage medium
Technical Field
The invention relates to the technical field of display equipment, in particular to a CUVA HDR video playing method, device and equipment and a readable storage medium.
Background
With the advent of the domestic Video standard organization China Ultra High definition Video industry Alliance (CUVA), a domestic Video standard called CUVA HDR (China Ultra High-definition Video industry Alliance High Dynamic Range Video standard) is also introduced. The CUVA HDR standard is similar to the HDR10 high dynamic range standard, and videos based on the standard can show richer color gradation, stronger picture contrast and truer details.
The problem that needs to be solved urgently is to enable the existing display equipment to play the CUVA HDR video.
Disclosure of Invention
The invention mainly aims to provide a CUVA HDR video playing method, a CUVA HDR video playing device, CUVA HDR video playing equipment and a computer readable storage medium, and aims to solve the technical problem that the existing display equipment is enabled to play CUVA HDR video.
In order to achieve the above object, in a first aspect, the present invention provides a CUVA HDR video playing method applied to a display device, where the CUVA HDR video playing method includes:
acquiring a CUVA HDR software development toolkit and an original code stream;
loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream;
according to a preset CUVA HDR image quality requirement, the display equipment is calibrated to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement;
acquiring CUVA HDR picture quality parameters of the display equipment in the standard picture quality display state;
and controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR picture quality parameter.
Based on the technical scheme, a CUVA HDR software development toolkit and an original code stream are obtained; loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream; according to a preset CUVA HDR image quality requirement, the display equipment is calibrated to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement; acquiring CUVA HDR picture quality parameters of the display equipment in the standard picture quality display state; and controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR picture quality parameters. Therefore, the CUVA HDR video playing is realized.
According to a first aspect, the step of calibrating the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement according to the preset CUVA HDR image quality requirement includes:
acquiring current color temperature information and current gamma information of the display equipment;
when the current color temperature information does not accord with the preset standard color temperature, calibrating the color temperature of the display equipment to the preset standard color temperature;
when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
Based on the above technical scheme, under the condition that the current color temperature information and the current gamma information of the display device do not meet the requirement of the preset CUVA HDR image quality, the color temperature of the display device is calibrated to the preset standard color temperature, and the gamma of the display device is calibrated to the preset standard gamma value, so that the display device is calibrated to the standard image quality display state corresponding to the preset CUVA HDR image quality requirement, and the display state of the display device meets the preset CUVA HDR image quality requirement.
According to the first aspect, or any implementation manner of the first aspect, the step of calibrating the display device to the preset standard color temperature when the current color temperature information does not conform to the preset standard color temperature includes:
judging whether the initial full-whiteness coordinate is in a first reference chromaticity coordinate range corresponding to the preset standard color temperature;
if the initial full-white degree coordinate is not in the reference chromaticity coordinate range, judging that the current color temperature information does not conform to the preset standard color temperature, and calibrating the color temperature of the display equipment to the preset standard color temperature;
if the initial full-white chromaticity coordinate is in the reference chromaticity coordinate range, judging that the current color temperature information accords with the preset standard color temperature, and executing the following steps: when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
Based on the technical scheme, the color temperature of the display equipment is calibrated to the preset standard color temperature through the condition that the current color temperature information of the display equipment does not conform to the preset standard color temperature, so that the current color temperature of the display equipment conforms to the preset CUVA HDR image quality requirement.
According to the first aspect, or any implementation manner of the first aspect, the step of calibrating the display device to the preset standard gamma value when the current color temperature information includes gray scale chromaticity coordinates of the display device when displaying a preset gray scale picture, and the current gamma information does not meet the preset standard gamma value includes:
judging whether the gray scale chromaticity coordinate is in a second reference chromaticity coordinate range corresponding to the preset standard gamma value;
if the gray scale chromaticity coordinate is not in the second reference chromaticity coordinate range, the current gamma information is judged not to conform to the preset standard gamma value, and gamma calibration is carried out on the display equipment until the preset standard gamma value is reached.
Based on the technical scheme, the gamma calibration is carried out on the display equipment until the current gamma information of the display equipment does not meet the preset standard gamma value, so that the current gamma value of the display equipment meets the preset CUVA HDR image quality requirement.
According to the first aspect, or any one of the above implementation manners of the first aspect, the preset standard color temperature is D65, and the preset standard gamma value is 2.2.
According to the first aspect, or any implementation manner of the first aspect, before the step of obtaining the CUVA HDR picture quality parameter of the display device in the standard picture quality display state, the CUVA HDR video playing method further includes:
controlling the display equipment in the standard image quality display state to respectively display a full red image, a full green image, a full blue image and a full white image;
detecting a full red degree coordinate corresponding to the full red picture, a full green degree coordinate corresponding to the full green picture, a full blue degree coordinate corresponding to the full blue picture and a full white degree coordinate corresponding to the full white picture by a preset color analysis unit;
controlling the display equipment to play a preset black-and-white window peak brightness test code stream, detecting the white window peak brightness through a preset color analysis unit, and taking the white window peak brightness as the target brightness of the display equipment;
and generating CUVA HDR image quality parameters of the display equipment in the standard image quality display state according to the full-redness coordinate, the full-greenness coordinate, the full-blueness coordinate, the full-whiteness coordinate and the target brightness.
Based on the technical scheme, the CUVA HDR image quality parameter of the display equipment in the standard image quality display state is generated by collecting the full red degree coordinate, the full green degree coordinate, the full blue degree coordinate, the full white degree coordinate and the target brightness of the display equipment in the standard image quality display state, and is used for playing the CUVA HDR code stream.
According to the first aspect, or any implementation manner of the first aspect, before the step of loading the CUVA HDR software development kit, decoding the original codestream based on the CUVA HDR software development kit, and obtaining a CUVA HDR codestream corresponding to the original codestream, the method includes:
judging whether the encoding standard of the original code stream is CUVA HDR:
if the encoding standard of the original code stream is CUVA HDR, executing the following steps: and loading the CUVA HDR software development tool package, decoding the original code stream based on the CUVA HDR software development tool package, and obtaining the CUVA HDR code stream corresponding to the original code stream.
Based on the above technical solution, before CUVA HDR decoding, by determining whether the encoding standard of the original code stream is CUVA HDR: determining whether the encoding standard of the original code stream is CUVA HDR, and executing the following steps: and loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream. Therefore, the error decoding of the original code stream can be avoided, and the accuracy of CUVA HDR decoding is improved.
In a second aspect, the present invention provides a CUVA HDR video playback apparatus, applied to a display device, the CUVA HDR video playback apparatus comprising:
the first acquisition module is used for acquiring a CUVA HDR software development toolkit and an original code stream;
the decoding module is used for loading the CUVA HDR software development tool package, decoding the original code stream based on the CUVA HDR software development tool package and obtaining a CUVA HDR code stream corresponding to the original code stream;
the calibration module is used for calibrating the display equipment to a standard image quality display state corresponding to a preset CUVA HDR image quality requirement according to the preset CUVA HDR image quality requirement;
the second acquisition module is used for acquiring CUVA HDR image quality parameters of the display equipment in the standard image quality display state;
and the control module is used for controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR image quality parameter.
According to a second aspect, the calibration module is further configured to:
acquiring current color temperature information and current gamma information of the display equipment;
when the current color temperature information does not conform to the preset standard color temperature, calibrating the color temperature of the display equipment to the preset standard color temperature;
when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
According to a second aspect, or any implementation manner of the second aspect above, the calibration module is further configured to:
judging whether the initial full-whiteness coordinate is in a first reference chromaticity coordinate range corresponding to the preset standard color temperature;
if the initial full-white degree coordinate is not in the reference chromaticity coordinate range, judging that the current color temperature information does not conform to the preset standard color temperature, and calibrating the color temperature of the display equipment to the preset standard color temperature;
if the initial full-white chromaticity coordinate is in the reference chromaticity coordinate range, judging that the current color temperature information accords with the preset standard color temperature, and executing the following steps: when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
According to a second aspect, or any implementation manner of the second aspect above, the calibration module is further configured to:
judging whether the gray scale chromaticity coordinate is in a second reference chromaticity coordinate range corresponding to the preset standard gamma value;
if the gray scale chromaticity coordinate is not in the second reference chromaticity coordinate range, the current gamma information is judged not to conform to the preset standard gamma value, and the gamma calibration is carried out on the display equipment until the preset standard gamma value is reached.
According to the second aspect, or any implementation manner of the second aspect, the preset standard color temperature is D65, and the preset standard gamma value is 2.2.
According to a second aspect, or any implementation manner of the second aspect above, the CUVA HDR video playback device further includes a quality parameter module; the image quality parameter module is used for:
controlling the display equipment in the standard image quality display state to respectively display a full red picture, a full green picture, a full blue picture and a full white picture;
detecting a full red degree coordinate corresponding to the full red picture, a full green degree coordinate corresponding to the full green picture, a full blue degree coordinate corresponding to the full blue picture and a full white degree coordinate corresponding to the full white picture by a preset color analysis unit;
controlling the display equipment to play a preset black-and-white window peak brightness test code stream, detecting the white window peak brightness through a preset color analysis unit, and taking the white window peak brightness as the target brightness of the display equipment;
generating CUVA HDR picture quality parameters of the display equipment in the standard picture quality display state according to the all-red degree coordinate, the all-green degree coordinate, the all-blue degree coordinate, the all-white degree coordinate and the target brightness.
According to a second aspect, or any implementation manner of the second aspect above, the CUVA HDR video playback device further includes a determining module; a determination module configured to:
judging whether the encoding standard of the original code stream is CUVA HDR:
if the encoding standard of the original code stream is CUVA HDR, executing the following steps: and loading the CUVA HDR software development tool package, decoding the original code stream based on the CUVA HDR software development tool package, and obtaining the CUVA HDR code stream corresponding to the original code stream.
In a third aspect, the present invention provides a CUVA HDR video playback device, where the CUVA HDR video playback device includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the CUVA HDR video playback method as described above.
Any one implementation manner of the third aspect corresponds to any one implementation manner of the first aspect. For technical effects corresponding to any one implementation manner of the third aspect and the third aspect, reference may be made to the technical effects corresponding to any one implementation manner of the first aspect and the first aspect, and details are not repeated here.
In a fourth aspect, the present invention provides a computer-readable storage medium, in which a computer program is stored, which, when executed by a processor, causes the processor to execute the CUVA HDR video playing method as described in any one of the above first aspect or possible implementations of the first aspect.
Any one implementation manner of the fourth aspect and the fourth aspect corresponds to any one implementation manner of the first aspect and the first aspect, respectively. For technical effects corresponding to any one implementation manner of the fourth aspect and the fourth aspect, reference may be made to the technical effects corresponding to any one implementation manner of the first aspect and the first aspect, and details are not repeated here.
In a fifth aspect, an embodiment of the present invention provides a computer program, where the computer program includes instructions for executing the CUVA HDR video playing method in the first aspect and any possible implementation manner of the first aspect.
Any one implementation manner of the fifth aspect and the fifth aspect corresponds to any one implementation manner of the first aspect and the first aspect, respectively. For technical effects corresponding to any one of the implementation manners of the fifth aspect and the fifth aspect, reference may be made to the technical effects corresponding to any one of the implementation manners of the first aspect and the first aspect, and details are not repeated here.
Drawings
Fig. 1 is a schematic structural diagram of a CUVA HDR video playback device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a CUVA HDR video playing method according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of a CUVA HDR video playing method according to the present invention;
FIG. 4 is a flowchart illustrating a CUVA HDR video playing method according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a CUVA HDR video playback device according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
The terms "first" and "second," and the like, in the description and in the claims of embodiments of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first target object and the second target object, etc. are specific sequences for distinguishing different target objects, rather than describing target objects.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the description of the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of processing units refers to two or more processing units; the plurality of systems refers to two or more systems.
For clarity and conciseness of the following descriptions of the embodiments, a brief introduction of an implementation of the CUVA HDR video playback method is first given:
with the advent of the domestic Video standard organization of the Ultra High definition Video industry Alliance (CUVA), the domestic Video standard also introduced is named CUVA HDR (China Ultra High-definition Video industry Alliance High Dynamic Range Video standard). The CUVA HDR standard is similar to the HDR10 high dynamic range standard, and videos based on the CUVA HDR standard can show richer color gradation, stronger picture contrast and truer details.
The problem that needs to be solved urgently is to enable the existing display equipment to play the CUVA HDR video.
The invention designs a method for playing CUVA HDR code stream based on CUVA HDR image quality parameters by loading the CUVA HDR software development toolkit to decode CUVA HDR so as to obtain CUVA HDR code stream, and then obtaining CUVA HDR image quality parameters of a display device in a standard image quality display state corresponding to the preset CUVA HDR image quality requirement, thereby realizing the playing of CUVA HDR video.
In some embodiments, the CUVA HDR video playing method is applied to a display device, and a CUVA HDR software development toolkit and an original code stream are acquired; loading the CUVA HDR software development toolkit, decoding the original code stream based on the CUVA HDR software development toolkit, and obtaining a CUVA HDR code stream corresponding to the original code stream; according to a preset CUVA HDR image quality requirement, the display equipment is calibrated to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement; acquiring CUVA HDR picture quality parameters of the display equipment in the standard picture quality display state; and controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR picture quality parameter. Therefore, the CUVA HDR video playing is realized.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a CUVA HDR video playback device in a hardware operating environment according to an embodiment of the present invention.
Specifically, the CUVA HDR video playing device may be a television, a PC (Personal Computer), a tablet Computer, a portable Computer, or a server.
As shown in fig. 1, the CUVA HDR video playback device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-F identity (WI-F I) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the architecture shown in fig. 1 does not constitute a limitation of the CUVA HDR video playback device and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of storage medium, may include therein an operating system, a data storage module, a network communication module, a user interface module, and a computer program.
In the CUVA HDR video playback device shown in fig. 1, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the CUVA HDR video playback device of the present invention may be disposed in the CUVA HDR video playback device, and the CUVA HDR video playback device invokes, through the processor 1001, a computer program stored in the memory 1005 and executes the CUVA HDR video playback method provided by the embodiment of the present invention.
It should be understood that the above description is only an example for better understanding of the technical solution of the present embodiment, and is not to be taken as the only limitation of the present embodiment.
The following describes the CUVA HDR video playing method in detail with reference to the flowchart of the first embodiment of the CUVA HDR video playing method shown in fig. 2.
Referring to fig. 2, a CUVA HDR video playing method provided by an embodiment of the CUVA HDR video playing method of the present invention is applied to a display device, and the CUVA HDR video playing method includes:
s100, acquiring a CUVA HDR software development toolkit and an original code stream;
specifically, the display device may include a television, a PC, a notebook computer, a portable computer, and the like.
In this embodiment, it should be noted that the CUVA HDR software development kit is a software development kit for enabling an application to call CUVA HDR decoding on an original codestream. The original code stream is a video input into the display device by a multimedia application (such as an internet multimedia application, a local multimedia application, and the like) or a storage medium (such as a U disk, a hard disk, and the like).
Step S200, loading the CUVA HDR software development tool package, decoding the original code stream based on the CUVA HDR software development tool package, and obtaining a CUVA HDR code stream corresponding to the original code stream;
and when the CUVA HDR software development toolkit is loaded, calling the CUVA HDR software development toolkit to perform CUVA HDR decoding on the original code stream, thereby obtaining the CUVA HDR code stream corresponding to the original code stream.
Further, in order to determine whether the bottom layer driver of the display device has been identified as the CUVA HDR decoding after the CUVA HDR software development kit is loaded, a preset query instruction may be sent to check the decoded code stream type, and when the code stream type is the CUVA HDR, it is indicated that the bottom layer driver of the display device has been identified as the CUVA HDR decoding. Illustratively, the preset query instruction is: cat/proc/msp/vfmw _ hdr. When the output is SrcFrmType: CUVA _ HDR. It means that the underlying driver of the display device has identified the original codestream as CUVA _ HDR for decoding and CUVA HDR SDK for decoding has been enabled.
Before the step S200 of loading the CUVA HDR software development kit, decoding the original code stream based on the CUVA HDR software development kit, and obtaining the CUVA HDR code stream corresponding to the original code stream, the method includes:
step S210, determining whether the encoding standard of the original code stream is CUVA HDR:
step S220, if the encoding standard of the original code stream is CUVA HDR, execute the steps of: and loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream.
Before CUVA HDR decoding, in this embodiment, by determining whether the encoding standard of the original code stream is CUVA HDR: determining whether the encoding standard of the original code stream is CUVA HDR, and executing the following steps: and loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream. Therefore, the error decoding of the original code stream can be avoided, and the accuracy of CUVA HDR decoding is improved.
Step S300, according to a preset CUVA HDR image quality requirement, calibrating the display equipment to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement;
in this embodiment, it should be noted that the preset CUVA HDR image quality requirement is a requirement of the CUVA HDR standard for the image quality of the playing video, where the preset CUVA HDR image quality requirement includes a preset standard color temperature and a preset standard gamma value. The preset standard color temperature is D65, the D65 light source is the most common artificial sunlight in the standard light sources, and the color temperature is 6500K. The preset standard gamma value is 2.2.
It can be understood that playing the CUVA HDR video requires not only the corresponding CUVA HDR code stream, but also adjusting the display state of the display device. And determining whether the current display state of the display equipment meets the preset CUVA HDR image quality requirement or not according to the preset CUVA HDR image quality requirement. If the current display state of the display device does not meet the preset CUVA HDR image quality requirement, the display device needs to be calibrated to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement. Illustratively, the current display state of the display device is color temperature D63, and gamma value is 2.1, which indicates that the display device does not achieve the display effect of the CUVA HDR even if the CUVA HDR code stream is output in the current display state. Therefore, the display device needs to be calibrated to the standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
Step S400, acquiring CUVA HDR picture quality parameters of the display equipment in the standard picture quality display state;
specifically, after the display device is calibrated to the standard image quality display state corresponding to the preset CUVA HDR image quality requirement, the image quality parameters of the display device also need to be adjusted. Therefore, the CUVA HDR picture quality parameter of the display device in the standard picture quality display state can be determined by acquiring the full-red degree coordinate, the full-green degree coordinate, the full-blue degree coordinate, the full-white degree coordinate and the white window peak luminance of the display device in the standard picture quality display state. The CUVA HDR picture quality parameter may include multiple types of parameters, such as a luminance parameter, a color temperature parameter, a contrast parameter, and Gamma.
And step S500, controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR image quality parameter.
After the CUVA HDR code stream and the CUVA HDR picture quality parameters are obtained, the display device can be controlled to play the CUVA HDR code stream based on the CUVA HDR picture quality parameters.
Further, before the CUVA HDR code stream is played, other image processing and enhancement algorithms are closed. The preset CUVA HDR gray scale test code stream can be played under different preset screen brightness based on the CUVA HDR image quality parameters, and the gray scale chromaticity coordinate of each gray scale window signal under each preset screen brightness is obtained. And judging whether each gray scale chromaticity coordinate accords with CUVA HDR standard or not so as to determine whether CUVA HDR decoding of the original code stream is correct or not. And when the CUVA HDR decoding of the original code stream is correct, the CUVA HDR code stream is connected with an application layer, a middleware and a skyhal layer of the display equipment in a butt joint mode, so that the CUVA HDR code stream is played based on the CUVA HDR image quality parameters.
It will be appreciated that the CUVA HDR type enumeration definition may be added at the application layer of the display device: and when the setting application receives the CUVA HDR code stream, displaying a corresponding CUVA HDR icon on the display equipment. A new HDR type enumeration definition may be added to the middleware: SKY _ MW _ HDR _ TYPE _ CUVA; therefore, the middleware adds a group of picture quality parameter definitions (namely the CUVA HDR picture quality parameters), so that when the HDR type of the current playing code stream is inquired to be CUVA HDR, the current picture quality parameters are updated to be the CUVA HDR picture quality parameters. The method includes the steps that support for CUVA HDR type is added to a getHdrType Interface of a skyhal layer of the display device, and field parameters supporting CUVA HDR are added to EDID (Extended display identification data) of HDMI (High Definition Multimedia Interface) so that the skyhal layer can identify code streams of the CUVA HDR type.
In the first embodiment of the invention, a CUVA HDR software development toolkit and an original code stream are obtained; loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream; according to a preset CUVA HDR image quality requirement, the display equipment is calibrated to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement; acquiring CUVA HDR picture quality parameters of the display equipment in the standard picture quality display state; and controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR picture quality parameter. Therefore, the CUVA HDR video playing is realized.
The CUVA HDR video playing method will be described in detail below with reference to the flowchart of the second embodiment of the CUVA HDR video playing method shown in fig. 3.
Referring to fig. 3, in another embodiment of the CUVA HDR video playing method of the present invention, the preset CUVA HDR image quality requirement includes a preset standard color temperature and a preset standard gamma value, and the step S300 aligns the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement according to the preset CUVA HDR image quality requirement, including:
step S310, acquiring current color temperature information and current gamma information of the display equipment;
step S320, when the current color temperature information does not accord with the preset standard color temperature, calibrating the color temperature of the display equipment to the preset standard color temperature;
step S330, calibrating the gamma of the display device to the preset standard gamma value when the current gamma information does not conform to the preset standard gamma value, so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
The preset standard color temperature is D65, and the preset standard gamma value is 2.2.
In this embodiment, the current color temperature information and the current gamma information of the display device may be displayed by a color analysis unit (e.g., a color analyzer). And when the current color temperature information does not accord with the preset standard color temperature, the current color temperature of the display equipment is not consistent with the preset standard color temperature, and the display equipment needs to be calibrated to the preset standard color temperature. When the current gamma information does not conform to the preset standard gamma value, which indicates that the current gamma value of the display device is inconsistent with the preset standard color temperature gamma value, calibrating the display device to the preset standard gamma value, so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
In this embodiment, when the current color temperature information and the current gamma information of the display device do not meet the requirement of the preset CUVA HDR image quality, the color temperature of the display device is calibrated to the preset standard color temperature, and the gamma of the display device is calibrated to the preset standard gamma value, so as to calibrate the display device to the standard image quality display state corresponding to the preset CUVA HDR image quality requirement, so that the display state of the display device meets the preset CUVA HDR image quality requirement.
Wherein, the current color temperature information includes an initial white degree coordinate of the display device when displaying a white image, and when the current color temperature information does not conform to the preset standard color temperature, the step S320 calibrates the display device to the preset standard color temperature, including:
step A10, judging whether the initial full-whiteness coordinate is in a first reference chromaticity coordinate range corresponding to the preset standard color temperature;
step A20, if the initial full whiteness coordinate is not in the reference chromaticity coordinate range, judging that the current color temperature information does not conform to the preset standard color temperature, and calibrating the color temperature of the display equipment to the preset standard color temperature;
step a30, if the initial white degree coordinate is in the reference chromaticity coordinate range, determining that the current color temperature information conforms to the preset standard color temperature, and executing the steps of: when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
In this embodiment, it should be noted that the current color temperature information includes an initial white-all degree coordinate of the display device when displaying a white-all picture. The chromaticity coordinates in this embodiment may be x-coordinate values and y-coordinate values of a CIE (Commission Internationale de L' Eclairage) color space.
In this embodiment, it may be determined whether the current color temperature information conforms to the preset standard color temperature by determining whether the initial full-whiteness coordinate is within a first reference chromaticity coordinate range corresponding to the preset standard color temperature. For example, in the case that the preset standard color temperature is D65, the first reference chromaticity coordinate range corresponding to the preset standard color temperature may be (0.313 ± 0.005,0.329 ± 0.005). And if the initial full-white degree coordinate is not in the reference chromaticity coordinate range, judging that the current color temperature information does not conform to the preset standard color temperature, and calibrating the color temperature of the display equipment to the preset standard color temperature. If the initial full-white chromaticity coordinate is in the reference chromaticity coordinate range, judging that the current color temperature information accords with the preset standard color temperature, and executing the following steps: when the current gamma information does not accord with the preset standard gamma value, the gamma of the display equipment is calibrated to the preset standard gamma value so as to calibrate the display equipment to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
According to the embodiment, the color temperature of the display device is calibrated to the preset standard color temperature through the condition that the current color temperature information of the display device does not conform to the preset standard color temperature, so that the current color temperature of the display device conforms to the preset CUVA HDR image quality requirement.
Wherein, the current color temperature information includes gray scale chromaticity coordinates of the display device when displaying a preset gray scale picture, and when the current gamma information does not conform to the preset standard gamma value in step S330, the display device is calibrated to the preset standard gamma value, including:
step B10, judging whether the gray scale chromaticity coordinate is in a second reference chromaticity coordinate range corresponding to the preset standard gamma value;
and step B20, if the gray scale chromaticity coordinate is not in the second reference chromaticity coordinate range, judging that the current gamma information does not conform to the preset standard gamma value, and carrying out gamma calibration on the display equipment to the preset standard gamma value.
Specifically, the current color temperature information includes gray scale chromaticity coordinates of the display device when displaying a preset gray scale picture, and the second reference chromaticity coordinate range is a chromaticity coordinate range calculated based on the preset standard gamma value as a central value.
In this embodiment, whether the current gamma information of the display device meets the preset standard gamma value may be determined by determining whether the gray-scale chromaticity coordinate is within a second reference chromaticity coordinate range corresponding to the preset standard gamma value. If the gray scale chromaticity coordinate is not in the second reference chromaticity coordinate range, the current gamma information is judged not to conform to the preset standard gamma value, and the gamma calibration is carried out on the display equipment to the preset standard gamma value, so that the current gamma value of the display equipment conforms to the preset CUVA HDR image quality requirement.
In this embodiment, the gamma calibration is performed on the display device to the preset standard gamma value through that the current gamma information of the display device does not meet the preset standard gamma value, so that the current gamma value of the display device meets the preset CUVA HDR image quality requirement.
The following describes the CUVA HDR video playing method in detail with reference to the flowchart of the third embodiment of the CUVA HDR video playing method shown in fig. 4.
Referring to fig. 4, in another embodiment of the CUVA HDR video playback method of the present invention, before the step of acquiring the CUVA HDR quality parameter of the display device in the standard quality display state in step S400, the CUVA HDR video playback method further includes:
step S410, controlling the display device in the standard image quality display state to display a full red picture, a full green picture, a full blue picture, and a full white picture, respectively;
step S420, detecting a full red degree coordinate corresponding to the full red picture, a full green degree coordinate corresponding to the full green picture, a full blue degree coordinate corresponding to the full blue picture and a full white degree coordinate corresponding to the full white picture through a preset color analysis unit;
step S430, controlling the display device to play a preset black-and-white window peak brightness test code stream, detecting the white window peak brightness through a preset color analysis unit, and taking the white window peak brightness as the target brightness of the display device;
step S440, generating CUVA HDR picture quality parameters of the display device in the standard picture quality display state according to the all-red degree coordinate, the all-green degree coordinate, the all-blue degree coordinate, the all-white degree coordinate, and the target brightness.
It is understood that the chromaticity coordinate in the present embodiment may be formed by an x coordinate value and a y coordinate value of the CIE color space.
In this embodiment, the display device in the standard image quality display state is controlled to display a full red picture, a full green picture, a full blue picture and a full white picture respectively; detecting a full red degree coordinate corresponding to the full red picture, a full green degree coordinate corresponding to the full green picture, a full blue degree coordinate corresponding to the full blue picture and a full white degree coordinate corresponding to the full white picture by a preset color analysis unit (such as a color analyzer); controlling the display equipment to play a preset black-and-white window peak brightness test code stream, detecting the white window peak brightness through a preset color analysis unit, and taking the white window peak brightness as the target brightness of the display equipment; converting the all-red degree coordinate, the all-green degree coordinate, the all-blue degree coordinate, the all-white degree coordinate and the target luminance into CUVA HDR image quality parameters based on a preset parameter conversion rule according to the all-red degree coordinate, the all-green degree coordinate, the all-blue degree coordinate, the all-white degree coordinate and the target luminance. For example, the all-red degree coordinate, the all-green degree coordinate, the all-blue degree coordinate, the all-white degree coordinate, and the target luminance may be saved in a picture quality page (pqtable) of the CUVA HDR code stream, so as to generate a pq.b file of new CUVA HDR picture quality parameters. Therefore, the display equipment loads the PQ.b file of the CUVA HDR picture quality parameter when the CUVA HDR code stream needs to be played.
In this embodiment, the CUVA HDR picture quality parameter of the display device in the standard picture quality display state is generated by collecting the full-red degree coordinate, the full-green degree coordinate, the full-blue degree coordinate, the full-white degree coordinate, and the target brightness of the display device in the standard picture quality display state, and is used for playing the CUVA HDR code stream.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a CUVA HDR video playback device according to an embodiment of the present invention.
The embodiment of the invention provides a CUVA HDR video playing device which is applied to display equipment, and the CUVA HDR video playing device comprises:
the first acquisition module 10 is configured to acquire a CUVA HDR software development kit and an original code stream;
a decoding module 20, configured to load the CUVA HDR software development kit, and decode the original code stream based on the CUVA HDR software development kit, to obtain a CUVA HDR code stream corresponding to the original code stream;
the calibration module 30 is configured to calibrate the display device to a standard image quality display state corresponding to a preset CUVA HDR image quality requirement according to the preset CUVA HDR image quality requirement;
a second obtaining module 40, configured to obtain a CUVA HDR quality parameter of the display device in the standard quality display state;
and the control module 50 is configured to control the display device to play the CUVA HDR code stream based on the CUVA HDR picture quality parameter.
Further, the calibration module 30 is further configured to:
acquiring current color temperature information and current gamma information of the display equipment;
when the current color temperature information does not accord with the preset standard color temperature, calibrating the color temperature of the display equipment to the preset standard color temperature;
when the current gamma information does not accord with the preset standard gamma value, the gamma of the display equipment is calibrated to the preset standard gamma value so as to calibrate the display equipment to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
Further, the calibration module 30 is further configured to:
judging whether the initial full-whiteness coordinate is in a first reference chromaticity coordinate range corresponding to the preset standard color temperature;
if the initial full-white degree coordinate is not in the reference chromaticity coordinate range, judging that the current color temperature information does not conform to the preset standard color temperature, and calibrating the color temperature of the display equipment to the preset standard color temperature;
if the initial full-white chromaticity coordinate is in the reference chromaticity coordinate range, judging that the current color temperature information accords with the preset standard color temperature, and executing the following steps: when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
Further, the calibration module 30 is further configured to:
judging whether the gray scale chromaticity coordinate is in a second reference chromaticity coordinate range corresponding to the preset standard gamma value;
if the gray scale chromaticity coordinate is not in the second reference chromaticity coordinate range, the current gamma information is judged not to conform to the preset standard gamma value, and gamma calibration is carried out on the display equipment until the preset standard gamma value is reached.
Further, the preset standard color temperature is D65, and the preset standard gamma value is 2.2.
Further, the CUVA HDR video playing device also comprises a picture quality parameter module; the image quality parameter module is used for:
controlling the display equipment in the standard image quality display state to respectively display a full red picture, a full green picture, a full blue picture and a full white picture;
detecting a full red degree coordinate corresponding to the full red picture, a full green degree coordinate corresponding to the full green picture, a full blue degree coordinate corresponding to the full blue picture and a full white degree coordinate corresponding to the full white picture by a preset color analysis unit;
controlling the display equipment to play a preset black-and-white window peak brightness test code stream, detecting the white window peak brightness through a preset color analysis unit, and taking the white window peak brightness as the target brightness of the display equipment;
and generating CUVA HDR image quality parameters of the display equipment in the standard image quality display state according to the full-redness coordinate, the full-greenness coordinate, the full-blueness coordinate, the full-whiteness coordinate and the target brightness.
Further, the CUVA HDR video playing device further comprises a judging module; a determination module configured to:
judging whether the encoding standard of the original code stream is CUVA HDR:
if the encoding standard of the original code stream is CUVA HDR, executing the following steps: and loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream.
In addition, an embodiment of the present invention further provides a computer storage medium, where a computer program is stored on the computer storage medium, and when the computer program is executed by a processor, the computer program implements the operations in the CUVA HDR video playing method provided in the foregoing embodiment, and specific steps are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A CUVA HDR video playing method is applied to a display device and comprises the following steps:
acquiring a CUVA HDR software development toolkit and an original code stream;
loading the CUVA HDR software development toolkit, decoding the original code stream based on the CUVA HDR software development toolkit, and obtaining a CUVA HDR code stream corresponding to the original code stream;
according to a preset CUVA HDR image quality requirement, the display equipment is calibrated to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement;
acquiring CUVA HDR picture quality parameters of the display equipment in the standard picture quality display state;
and controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR picture quality parameters.
2. The method as claimed in claim 1, wherein the predetermined CUVA HDR video playback method comprises a predetermined standard color temperature and a predetermined standard gamma value, and the step of calibrating the display device to a standard video display state corresponding to the predetermined CUVA HDR video playback method according to the predetermined CUVA HDR video playback requirement comprises:
acquiring current color temperature information and current gamma information of the display equipment;
when the current color temperature information does not accord with the preset standard color temperature, calibrating the color temperature of the display equipment to the preset standard color temperature;
when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
3. The CUVA HDR video playing method of claim 2, wherein the current color temperature information comprises an initial white gamut coordinate of the display device when displaying a white gamut, and the step of calibrating the display device to the preset standard color temperature when the current color temperature information does not conform to the preset standard color temperature comprises:
judging whether the initial full-white chromaticity coordinate is in a first reference chromaticity coordinate range corresponding to the preset standard color temperature or not;
if the initial full-white degree coordinate is not in the reference chromaticity coordinate range, judging that the current color temperature information does not conform to the preset standard color temperature, and calibrating the color temperature of the display equipment to the preset standard color temperature;
if the initial full-white chromaticity coordinate is in the reference chromaticity coordinate range, judging that the current color temperature information accords with the preset standard color temperature, and executing the following steps: when the current gamma information does not conform to the preset standard gamma value, gamma calibrating the display device to the preset standard gamma value so as to calibrate the display device to a standard image quality display state corresponding to the preset CUVA HDR image quality requirement.
4. The CUVA HDR video playing method of claim 2, wherein the current color temperature information comprises gray scale chromaticity coordinates of the display device when displaying a preset gray scale picture, and the step of calibrating the display device to the preset standard gamma value when the current gamma information does not meet the preset standard gamma value comprises:
judging whether the gray scale chromaticity coordinate is in a second reference chromaticity coordinate range corresponding to the preset standard gamma value;
if the gray scale chromaticity coordinate is not in the second reference chromaticity coordinate range, the current gamma information is judged not to conform to the preset standard gamma value, and the gamma calibration is carried out on the display equipment until the preset standard gamma value is reached.
5. The CUVA HDR video playing method of claim 2, wherein the preset standard color temperature is D65, and the preset standard gamma value is 2.2.
6. The CUVA HDR video playing method of claim 1, wherein before the step of obtaining the CUVA HDR picture quality parameter of the display device in the standard picture quality display state, the CUVA HDR video playing method further comprises:
controlling the display equipment in the standard image quality display state to respectively display a full red image, a full green image, a full blue image and a full white image;
detecting a full red degree coordinate corresponding to the full red picture, a full green degree coordinate corresponding to the full green picture, a full blue degree coordinate corresponding to the full blue picture and a full white degree coordinate corresponding to the full white picture by a preset color analysis unit;
controlling the display equipment to play a preset black-and-white window peak brightness test code stream, detecting the white window peak brightness through a preset color analysis unit, and taking the white window peak brightness as the target brightness of the display equipment;
and generating CUVA HDR image quality parameters of the display equipment in the standard image quality display state according to the full-redness coordinate, the full-greenness coordinate, the full-blueness coordinate, the full-whiteness coordinate and the target brightness.
7. The CUVA HDR video playing method of any one of claims 1 to 6, wherein before the step of loading the CUVA HDR software development kit, decoding the original bitstream based on the CUVA HDR software development kit, and obtaining the CUVA HDR bitstream corresponding to the original bitstream, the method comprises:
judging whether the encoding standard of the original code stream is CUVA HDR:
if the encoding standard of the original code stream is CUVA HDR, executing the following steps: and loading the CUVA HDR software development tool package, and decoding the original code stream based on the CUVA HDR software development tool package to obtain a CUVA HDR code stream corresponding to the original code stream.
8. A CUVA HDR video playing device applied to a display device, the CUVA HDR video playing device comprising:
the first acquisition module is used for acquiring a CUVA HDR software development toolkit and an original code stream;
the decoding module is used for loading the CUVA HDR software development toolkit, decoding the original code stream based on the CUVA HDR software development toolkit and obtaining a CUVA HDR code stream corresponding to the original code stream;
the calibration module is used for calibrating the display equipment to a standard image quality display state corresponding to a preset CUVA HDR image quality requirement according to the preset CUVA HDR image quality requirement;
a second obtaining module, configured to obtain a CUVA HDR image quality parameter of the display device in the standard image quality display state;
and the control module is used for controlling the display equipment to play the CUVA HDR code stream based on the CUVA HDR image quality parameter.
9. A CUVA HDR video playback device, the CUVA HDR video playback device comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the CUVA HDR video playback method as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the CUVA HDR video playback method of any one of claims 1 to 7.
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