CN103079088B - Multi-screen video pre-filtering and synchronous broadcast method and system - Google Patents
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Abstract
The present invention provides a kind of multi-screen video pre-filtering and synchronous broadcast method and system, and its method includes step: be stored in by video data respectively in the locally stored space of each video playback node；Each described video playback node converts described video data to YUV image sequence respectively.Owing to YUV image sequence is a frame frame arrangement, then when video data is play, just audio video synchronization can be accurate to each frame, to carry out audio video synchronization by video playback progression time more accurate relative to existing, simultaneously, video data is stored in the corresponding locally stored space of each video playback node, also effectively prevent by data transmission efficiency low cause image offset, tear, color tomography etc., it is achieved that better audio video synchronization effect.
Description
Technical field
The present invention relates to multi-screen tiled display field, particularly relate to a kind of multi-screen video pre-filtering and synchronous broadcast method and system.
Background technology
Play in the system of ultrahigh resolution video at present in design multi-screen splicing display system, more common a kind of video synchronization method is to send video file to each video playback node by video server, then when commencing play out video, the playing progress rate time of video is sent to each broadcast nodes from server, each broadcast nodes calibrate local playing progress rate further according to the video playback progression time adjustment received.
Or through optimizing further, it is possible to make video server cycle through video playback progression time according to interval set in advance, allow broadcast nodes constantly update the time reference of playing progress rate, thus realizing the lasting correction to video playback progress.
But, when these traditional approachs are applied in ultrahigh resolution video playback, owing to video data capacity is huge, when transmitting video file, the bandwidth restriction of data transmission channel can be subject to, cause that efficiency of transmission is low；It addition, send, based on server, the support deficiency that high frame-rate video is play by the bearing calibration existence of video playback progression time, it is impossible to ensure the accurate synchronization that multihead display ultrahigh resolution high frame-rate video is play.After long-time play operation, accumulated image synchronization error can directly result on multi-display stitching image, there is image offset, tear, the display effect defect such as color tomography.
Summary of the invention
It is an object of the invention to overcome the shortcoming and defect of prior art, it is provided that a kind of multi-screen video pre-filtering and synchronous broadcast method and system, it is possible to reach good audio video synchronization effect.
The purpose of the present invention is achieved through the following technical solutions:
A kind of multi-screen video pre-filtering and synchronous broadcast method, it is characterised in that comprise the steps:
Respectively video data is stored in the locally stored space of each video playback node；
Each described video playback node converts described video data to YUV image sequence respectively.
A kind of multi-screen video pre-filtering and synchronous playing system, it is characterised in that including multiple node unit, described node unit includes respectively:
Memory module, for the locally stored video data at video playback node；
Modular converter, for converting described video data to YUV image sequence.
According to the scheme of the invention described above, after in the corresponding memory space be stored in by video data respectively each video playback node, each video playback node can convert this video data to YUV image sequence respectively；Then when needs playing video data, just can directly play the YUV image sequence after conversion, and this YUV image sequence is a frame frame arrangement, then when video data is play, just audio video synchronization can be accurate to each frame, temporally to carry out audio video synchronization more accurate relative to existing, simultaneously, video data is stored in the corresponding locally stored space of each video playback node, also effectively prevent by data transmission efficiency low cause image offset, tear, color tomography etc., it is achieved that better audio video synchronization effect.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of multi-screen video pre-filtering of the present invention and synchronous broadcast method embodiment；
Fig. 2 is the schematic flow sheet of multi-screen video pre-filtering of the present invention and synchronous broadcast method first embodiment；
Fig. 3 is the schematic flow sheet of multi-screen video pre-filtering of the present invention and synchronous broadcast method the second embodiment；
Fig. 4 is the schematic flow sheet of multi-screen video pre-filtering of the present invention and synchronous broadcast method the 3rd embodiment；
Fig. 5 is the schematic flow sheet of multi-screen video pre-filtering of the present invention and synchronous broadcast method the 4th embodiment；
Fig. 6 is the structural representation of multi-screen video pre-filtering of the present invention and synchronous playing system embodiment.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is further elaborated, but the implementation of the present invention is not limited to this.
Shown in Figure 1, the schematic flow sheet of multi-screen video pre-filtering of the present invention and synchronous broadcast method embodiment.As it is shown in figure 1, the multi-screen video pre-filtering in the present embodiment comprises the steps: with synchronous broadcast method
Step S101: respectively video data is stored in the locally stored space of each video playback node；
Step S102: described video data is converted to YUV (a kind of colour coding method that YUV is adopted by eurovision system) image sequence by each described video playback node respectively, wherein, convert video data into YUV image sequence and can adopt existing mode, do not repeat them here.
Above-mentioned, before playing video data, in advance video data is stored in the locally stored space of each video playback node, avoid use high performance video server, initialization procedure need not from the mass data transmitting the required video play video server to each broadcast nodes simultaneously, greatly reduce the bandwidth to data transmission channel to rely on, saved the cost of system constructing, also effectively prevent by data transmission efficiency low cause image offset, tear, color tomography etc.；
Additionally, each video playback node converts video data into YVU image sequence, then when video data is play, just audio video synchronization can be accurate to each frame, relative to existing temporally (a lot of frame data in the unit interval, can be included) and carry out audio video synchronization more accurate, it may be achieved better audio video synchronization effect.
As it was previously stated, better audio video synchronization effect can be obtained after converting video data into YVU image sequence, below, in embodiment one, it is specifically described a kind of concrete execution process realizing multi-screen audio video synchronization broadcast mode.
Embodiment one
As in figure 2 it is shown, the present embodiment carries out multi-screen audio video synchronization broadcasting on the basis of above-described embodiment, it implements process and may include steps of:
Step S201: master synchronizer sends play instruction to each described video playback node, described play instruction includes video playback configuration information, and starts reference synchronization frame sequence counting with the play frame rate in described video playback configuration information sending described play instruction simultaneously；
Described video playback configuration information for carrying out the location calibration of audio video synchronization broadcasting to each video playback node；Concrete, described video playback configuration information may include that video playback frame per second, video are initial or stop play instruction, audio video synchronization sequence frame interval etc.；
Step S202: each described video playback node, when receiving described play instruction, is play frame sequence count value according to described play frame rate and local video respectively and play described YUV image sequence；
Step S203: each described video playback node sends the request of reference synchronization frame sequence count value according to the audio video synchronization sequence frame interval in described video playback configuration information to described master synchronizer；
Step S204: described master synchronizer responds the request of described reference synchronization frame sequence count value, sends current base synchronization frame sequence counter value to each described video playback node respectively；
Step S205: each described video playback node is according to the local video playback frame sequence count value of reference synchronization frame sequence count value correction received, and wherein, correcting mode can adopt existing implementation, does not repeat them here.
Accordingly, according to the scheme in the present embodiment, each video playback node can using reference synchronization frame sequence count value as synchronous base, calibrate local video broadcasting frame sequence count value by this reference synchronization frame sequence count value and video data synchronization can be accurate to a frame for base, this video playback node and master synchronizer adopt sequence of frames of video counting as the mode of the base Tong Bu approached, replace in prior art conventional with the unit interval for base's mode, coordinate using the sequence of frames of video counting interval as audio video synchronization correct operation interval, it is more suitable for the precise synchronization video in the application scenario that high frame-rate video is play.
Embodiment two
Additionally, audio video synchronization player method conventional at present is to adopt according to the playing progress rate of configuration information, video data is directly decoded display, display picture area cannot be controlled, and video data of the present invention converts YVU image sequence to, the control to display picture area can be realized, shown in Figure 3, concrete implementation mode can include step:
Step S301: master synchronizer sends play instruction to each video playback node, and described play instruction includes video cut lengths coordinate data；
Described video cut lengths coordinate data may include that corresponding each apex coordinate of video pictures of the undertaken display of video playback node, the picture corresponding vertex coordinate at on-screen display (osd) area, and this video cut lengths coordinate data can calculate according to the corresponding relation of each broadcast nodes with screen display unit and generate；
Step S302: each video playback node, when receiving described video cut lengths data, shows the picture image content of corresponding part according to these video cut lengths data on corresponding display screen unit.
In the present embodiment, the mode of video pictures content is shown according to described video cut lengths data, can the broadcasting pictures resolution of flexible configuration video playback node, and it is capable of the control to video pictures viewing area, and then abnormity display can be realized in the occasion that ultrahigh resolution audio video synchronization is play.
Above-described embodiment one is to include video playback configuration information for play instruction to illustrate, above-described embodiment two is to include video cut lengths coordinate data for play instruction to illustrate, it is also possible to be include cut lengths coordinate data and video playback configuration information in play instruction simultaneously.Include cut lengths coordinate data for play instruction below simultaneously and video playback configuration information illustrates.
Embodiment three
As shown in Figure 4, in this embodiment, concrete processing procedure includes:
Step 4201: master synchronizer sends play instruction to each described video playback node, described play instruction includes video playback configuration information and video cut lengths coordinate data, and starts reference synchronization frame sequence counting with the play frame rate in described video playback configuration information sending described play instruction simultaneously；
Described video playback configuration information for carrying out the location calibration of audio video synchronization broadcasting to each video playback node；Concrete, described video playback configuration information may include that video playback frame per second, video are initial or stop play instruction, audio video synchronization sequence frame interval etc.；
Described video cut lengths coordinate data may include that corresponding each apex coordinate of video pictures of the undertaken display of video playback node, the picture corresponding vertex coordinate at on-screen display (osd) area, and this video cut lengths coordinate data can calculate according to the corresponding relation of each broadcast nodes with display screen unit and generate；
Step 402: each video playback node is receiving described play instruction constantly, play frame sequence count value according to described play frame rate and local video respectively and play described YUV image sequence, and on corresponding display screen unit, show the picture image content of corresponding part respectively according to described video cut lengths data；
Step 403～step 405 is corresponding identical with step 203～step 205, does not repeat them here.
According to the scheme in the present embodiment, it is achieved that the simultaneous display of video data, also achieve abnormity display.
Embodiment four
In order to improve synchronization approaching of broadcast nodes and master synchronizer further, as one preferably embodiment, the present embodiment can also comprise the steps: on the basis of above-described embodiment one or embodiment three
Step 501: each described video playback nodes records receives the first reception time during reference synchronization frame sequence count value, and sends the benchmark confirmation including this first reception time to described master synchronizer；
Step 503: described master synchronizer record receives the second reception time during described benchmark confirmation, and sends this second reception time to each described video playback node；
Step 503: each described video playback node obtains the second difference of the reference synchronization frame sequence count value after offsetting data transmission channel time delay and local video broadcasting frame sequence count value respectively according to described second reception time and the described first the first difference receiving the time；
Step 504: according to described second difference, described local play sequence count value being corrected, concrete trimming process can adopt existing mode to realize, and does not repeat them here.
Due in the present embodiment, counteract data transmission channel time delay so that the second difference that reference synchronization frame sequence count value and local video play frame sequence count value is more accurate, it is possible to improve synchronization approaching of each broadcast nodes and master synchronizer further.
The data communication channel adopted in various embodiments above can include but are not limited to Ethernet, fiber optic network, universal asynchronous serial, spi bus, I2C bus etc.；The video that video playback node is play can include but not limit the video server video source deriving from video flowing locally stored, that telecommunication network transmits or specifying.
Multi-screen video pre-filtering according to the invention described above and synchronous broadcast method, the present invention also provides for a kind of multi-screen video pre-filtering and synchronous playing system, and just the multi-screen video pre-filtering of the present invention and the concrete example of synchronous playing system are described in detail below.Having illustrated the structural representation of the multi-screen video pre-filtering of the present invention and a preferable examples of synchronous playing system in Fig. 6, in figure 6, only gived the sub-structure of a video playback node 602, other video playback nodes also include these sub-structures.According to different Considerations, when implementing multi-screen video pre-filtering and the synchronous playing system of the present invention, what can comprise shown in Fig. 6 is whole, can also only comprising a portion shown in Fig. 6, just concrete example for several multi-screen video pre-filterings therein Yu synchronous playing system is described in detail below.
Concrete example 1
In this concrete example, it is possible to being include each video playback node 602 in Fig. 6, each video playback node 602 includes memory module 6021, modular converter 6022 respectively, wherein:
Memory module 6021, for the locally stored video data at video playback node；
Modular converter 6022, for converting described video data to YUV image sequence, wherein, converts video data into YUV image sequence and can adopt existing mode, do not repeat them here.
Accordingly, according to the scheme of this concrete example, memory module 6021 is after the locally stored video data of video playback node, and this video data can be converted to YUV image sequence by modular converter 6022.Owing to achieving in the locally stored space that video data is stored in each video playback node, avoid use high performance video server, simultaneity factor initialization procedure need not from the mass data transmitting broadcasting video video server to each broadcast nodes, greatly reduce the bandwidth to data transmission channel to rely on, saved the cost of system constructing, also effectively prevent by data transmission efficiency low cause image offset, tear, color tomography etc.；Owing to converting video data into YVU image sequence, then when video data is play, just audio video synchronization can be accurate to each frame, relative to existing temporally (a lot of frame data in the unit interval, can be included) and carry out synchronizing more accurate, it may be achieved better audio video synchronization effect.
Concrete example 2
In this concrete example, the basis of above-mentioned concrete example 1 can also include master synchronizer 601, master synchronizer 601 includes reference count module 6011, Synchronization Control communication module 6012, in addition, each video playback node 602 respectively further comprises synchronous communication module 6023, playing module 6024, node counts module 6025, correction module 6026, wherein:
Synchronization Control communication module 6011 is for sending play instruction to each described video playback node, described play instruction includes video playback configuration information, it is additionally operable to respond the request of described reference synchronization frame sequence count value, respectively current base synchronization frame sequence counter value is sent to each described video playback node, wherein, video playback configuration information may include that video playback frame per second, video are initial or stop play instruction, audio video synchronization sequence frame interval etc.；
Reference count module 6012 starts reference synchronization frame sequence counting with the play frame rate in described video playback configuration information for sending described play instruction in Synchronization Control communication module 6011 simultaneously；
Synchronous communication module 6023 is used for receiving described play instruction, it is additionally operable to send the request of reference synchronization frame sequence count value according to the audio video synchronization sequence frame interval in described video playback configuration information to master synchronizer 601, is additionally operable to receive described reference synchronization frame sequence count value；
Node counts module 6025 plays frame sequence counting for starting local video when synchronous communication module 6023 receives described play instruction；
Playing module 6024 is for when synchronous communication module 6023 receives described play instruction, playing frame sequence count value according to the local video of described play frame rate and node counts module 6025 and play described YUV image sequence；
Correction module 6025 is for according to the local video playback frame sequence count value of reference synchronization frame sequence count value correction received, and wherein, correcting mode can adopt existing implementation, does not repeat them here.
Accordingly, according to the scheme in this concrete example, each video playback node can using reference synchronization frame sequence count value as synchronous base, calibrate local video broadcasting frame sequence count value by this reference synchronization frame sequence count value and video data synchronization can be accurate to a frame for base, this video playback node and master synchronizer adopt sequence of frames of video counting as the mode of the base Tong Bu approached, replace in prior art conventional with the unit interval for base's mode, coordinate using the sequence of frames of video counting interval as audio video synchronization correct operation interval, it is more suitable for the precise synchronization video in the application scenario that high frame-rate video is play.
Concrete example 3
On the basis of concrete example 2, each video playback node can also include display control module 6027 respectively, and described play instruction can also include video cut lengths data；Described video cut lengths coordinate data may include that corresponding each apex coordinate of video pictures of the undertaken display of video playback node, the picture corresponding vertex coordinate at on-screen display (osd) area, and this video cut lengths coordinate data can calculate according to the corresponding relation of each broadcast nodes with screen display unit and generate；Display control module 6027 for showing the picture image of corresponding part according to corresponding video cut lengths data on corresponding display screen unit.
In this concrete example, the mode of video pictures content is shown according to described video cut lengths data, can the broadcasting pictures resolution of flexible configuration video playback node, and it is capable of the control to video pictures viewing area, and then abnormity display can be realized in the occasion that ultrahigh resolution audio video synchronization is play.
Concrete example 4
In order to improve synchronization approaching of broadcast nodes and master synchronizer further, as one preferably embodiment:
Synchronous communication module 6023 can be also used for the first reception time recorded when receiving reference synchronization frame sequence count value, and send the benchmark confirmation including for the first reception time to described master synchronizer；
Synchronization Control communication module 6012 can be also used for recording the second reception time receiving described benchmark confirmation, and the time that receives described second sends to each described video playback node；
Correction module 6026 can receive the time and described first according to described second and receive first difference of time and obtain the second difference playing frame sequence count value through offsetting the reference synchronization frame sequence count value after data transmission channel time delay and local video, and according to this second difference described local play sequence count value is corrected.
Owing to, in this concrete example, counteracting data transmission channel time delay so that the second difference that reference synchronization frame sequence count value plays frame sequence count value with local video is more accurate, it is possible to improve synchronization approaching of each broadcast nodes and master synchronizer further.
The data communication channel adopted in each concrete example above can include but are not limited to Ethernet, fiber optic network, universal asynchronous serial, spi bus, I2C bus etc.；The video that video playback node is play can include but not limit the video server video source deriving from video flowing locally stored, that telecommunication network transmits or specifying.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a multi-screen video pre-filtering and synchronous broadcast method, it is characterised in that comprise the steps:
Respectively video data is stored in the locally stored space of each video playback node；
Each described video playback node converts described video data to YUV image sequence respectively；
Master synchronizer sends play instruction to each described video playback node, and described play instruction includes video playback configuration information, and starts reference synchronization frame sequence counting with the play frame rate in described video playback configuration information sending described play instruction simultaneously；
Each described video playback node, when receiving described play instruction, is play frame sequence count value according to described play frame rate and local video respectively and is play described YUV image sequence；
Each described video playback node sends the request of reference synchronization frame sequence count value according to the audio video synchronization sequence frame interval in described video playback configuration information to described master synchronizer；
Described master synchronizer responds the request of described reference synchronization frame sequence count value, sends current base synchronization frame sequence counter value to each described video playback node respectively；
Each described video playback node is according to the local video playback frame sequence count value of reference synchronization frame sequence count value correction received.
2. multi-screen video pre-filtering according to claim 1 and synchronous broadcast method, it is characterised in that further comprise the steps of:
When playing described YUV image sequence, master synchronizer sends play instruction to each video playback node, and described play instruction includes video cut lengths data；
Each video playback node, when receiving described play instruction, shows the picture image of corresponding part respectively according to corresponding video cut lengths data on corresponding display screen unit.
3. multi-screen video pre-filtering according to claim 1 and synchronous broadcast method, it is characterised in that further comprise the steps of:
Each described video playback nodes records receives the first reception time during reference synchronization frame sequence count value, and sends the benchmark confirmation including this first reception time to described master synchronizer；
Described master synchronizer record receives the second reception time during described benchmark confirmation, and sends this second reception time to each described video playback node；
Each described video playback node obtains the second difference of the reference synchronization frame sequence count value after offsetting data transmission channel time delay and local video broadcasting frame sequence count value respectively according to described second reception time and the described first the first difference receiving the time；
According to described second difference, described local play sequence count value is corrected.
4. multi-screen video pre-filtering according to claim 1 or 3 and synchronous broadcast method, it is characterized in that, the communication port between described master synchronizer and each described video playback node includes Ethernet, fiber optic network, universal asynchronous serial, spi bus, I2C bus.
5. multi-screen video pre-filtering according to claim 1 and synchronous broadcast method, it is characterised in that the source of described video data includes locally stored, the video flowing of telecommunication network transmission, predetermined video server video source.
6. a multi-screen video pre-filtering and synchronous playing system, it is characterized in that, including multiple video playback nodes, master synchronizer, described video playback node includes memory module, modular converter, synchronous communication module, node counts module, playing module, correction module respectively, described master synchronizer includes reference count module and Synchronization Control communication module, wherein:
Described memory module is for the locally stored video data at video playback node；
Described modular converter is for converting described video data to YUV image sequence；
Described Synchronization Control communication module is for sending play instruction to each described video playback node, described play instruction includes video playback configuration information, it is additionally operable to respond the request of described reference synchronization frame sequence count value, respectively current base synchronization frame sequence counter value is sent to each described video playback node；
Described reference count module starts reference synchronization frame sequence counting with the play frame rate in described video playback configuration information for sending described play instruction in described Synchronization Control communication module simultaneously；
Described synchronous communication module is used for receiving described play instruction, it is additionally operable to send the request of reference synchronization frame sequence count value according to the audio video synchronization sequence frame interval in described video playback configuration information to described master synchronizer, is additionally operable to receive described reference synchronization frame sequence count value；
Described node counts module plays frame sequence counting for starting local video when described synchronous communication module receives described play instruction；
Described playing module is for when described synchronous communication module receives described play instruction, playing frame sequence count value according to described play frame rate and local video and play described YUV image sequence；
Described correction module is for according to the local video playback frame sequence count value of reference synchronization frame sequence count value correction received.
7. multi-screen video pre-filtering according to claim 6 and synchronous playing system, it is characterised in that described video playback node respectively further comprises display control module, described play instruction also includes video cut lengths data；
Described display control module for showing the picture image of corresponding part according to corresponding video cut lengths data on corresponding display screen unit.
8. multi-screen video pre-filtering according to claim 6 or 7 and synchronous playing system, it is characterised in that:
Described synchronous communication module is additionally operable to the first reception time recorded when receiving reference synchronization frame sequence count value, and sends the benchmark confirmation including for the first reception time to described master synchronizer；
Described Synchronization Control communication module is additionally operable to record the second reception time receiving described benchmark confirmation, and the time that receives described second sends to each described video playback node；
Described correction module receives the time and described first according to described second and receives first difference of time and obtain the second difference playing frame sequence count value through offsetting the reference synchronization frame sequence count value after data transmission channel time delay and local video, and according to this second difference described local play sequence count value is corrected.
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| CN103475908A (en) * | 2013-07-23 | 2013-12-25 | 北京九华互联科技有限公司 | Multi-screen synchronization play method and device |
| CN103491317B (en) * | 2013-09-06 | 2017-01-25 | 艾迪普（北京）文化科技股份有限公司 | Three-dimensional figure and image multi-screen synchronous broadcasting method, device and system |
| CN103986960A (en) * | 2014-06-03 | 2014-08-13 | 王军明 | Method for single-video picture division route teletransmission precise synchronization tiled display |
| CN104216671B (en) * | 2014-08-19 | 2017-03-22 | 宁波Gqy视讯股份有限公司 | Method for realizing synchronous cooperated display on multiple sets of spliced display screens |
| CN104168466B (en) * | 2014-08-22 | 2016-05-25 | 广东威创视讯科技股份有限公司 | A kind of multi-screen audio video synchronization player method and device |
| CN104918137B (en) * | 2015-06-03 | 2018-04-13 | 宁波Gqy视讯股份有限公司 | A kind of method of mosaic screen system plays video |
| CN106507035A (en) * | 2015-09-07 | 2017-03-15 | 江苏清投视讯科技有限公司 | A kind of image-display units based on fiber-optic transfer |
| CN106231250B (en) * | 2016-07-27 | 2019-05-24 | 成都之维安科技股份有限公司 | The method of the video monitoring equipment synchronously control of different model |
| CN107566881B (en) * | 2017-08-31 | 2021-03-09 | 深圳创维－Rgb电子有限公司 | VR equipment control method, device and system |
| CN108391151A (en) * | 2018-02-27 | 2018-08-10 | 郑州云海信息技术有限公司 | JPEG frames video data handling procedure, device, system and readable storage medium storing program for executing |
| CN109669654A (en) * | 2018-12-22 | 2019-04-23 | 威创集团股份有限公司 | A kind of combination display methods and device |
| CN112770164A (en) * | 2020-12-22 | 2021-05-07 | 上海幻维数码创意科技股份有限公司 | Video synchronous playing method |
| CN113438328B (en) * | 2021-08-30 | 2021-12-21 | 成都丰硕智能数字科技有限公司 | Low-delay terminal synchronization system and method |
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