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CN111586443B - Information output method and system based on H.265 protocol distributed system - Google Patents

Information output method and system based on H.265 protocol distributed system Download PDF

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Publication number
CN111586443B
CN111586443B CN202010436266.6A CN202010436266A CN111586443B CN 111586443 B CN111586443 B CN 111586443B CN 202010436266 A CN202010436266 A CN 202010436266A CN 111586443 B CN111586443 B CN 111586443B
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data
parameter
information
matched
frame data
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CN111586443A (en
Inventor
袁永平
杨顶东
朱龙龙
李金凯
刘加洋
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Shanghai Dayin Multimedia Technology Co ltd
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Shanghai Dayin Multimedia Technology Co ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/23418Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234309Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44008Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440218Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention belongs to the field of audio and video transmission control, and relates to an information output method and an information output system based on an H.265 protocol distributed system, wherein the information output method based on the H.265 protocol distributed system comprises the following steps: receiving video stream data sent by a sending end under the condition that a source filter is activated, and reading current image information parameters in the video stream data; forming first frame data based on the video stream data matched with the current image information parameter in a state that the current image information parameter is matched with a preset image parameter; and establishing a filter chart in the state of acquiring the first frame data, and outputting audio and video data information matched with the first frame data to a decoder.

Description

Information output method and system based on H.265 protocol distributed system
Technical Field
The invention belongs to the field of audio and video transmission control, and relates to an information output method and system based on an H.265 protocol distributed system.
Background
Existing information is transmitted through an H.265 protocol distributed system, H.265 is a new video coding standard established after the International Union video coding experts group (AIGPE) is followed by H.264(H.264 is a new generation digital video compression format proposed by the International organization for standardization and the International telecommunication Union, followed by MPEG4 (motion Picture Standard), and H.264 is also part tenth of MPEG-4 at the same time, and is a highly compressed digital video codec standard proposed by the Joint video team consisting of the AIGPE and the AIGPE).
Although the h.265 protocol distributed system can reduce real-time delay when transmitting information, a certain time is required for processing in the processes of signal source encoding, transmission and decoding, and delay of more than 80ms is still caused when output by a rear-end splicing screen, which may cause great influence on practical application, for example, when a video call is passed, the two video communications are subjected to call snatching behavior caused by delay.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an information output method and system based on an H.265 protocol distributed system, so as to ensure the synchronism of back-end audio and video transmission. In particular, the amount of the solvent to be used,
in one aspect, the present invention provides an information output method based on an h.265 protocol distributed system, wherein the information output method includes the following steps:
receiving video stream data sent by a sending end under the condition that a source filter is activated, and reading current image information parameters in the video stream data;
forming first frame data based on the video stream data matched with the current image information parameter in a state that the current image information parameter is matched with a preset image parameter;
and establishing a filter chart in the state of acquiring the first frame data, and outputting audio and video data information matched with the first frame data to a decoder.
Preferably, the above information output method based on the h.265 protocol distributed system, wherein, in a state that the source filter is activated, receiving video stream data sent by a sending end, and before reading current image information parameters in the video stream data, further includes:
the conversion filter is configured to accept packets in a preset parameter notification state, and discards packets matching the preset parameter notification.
Preferably, the above information output method based on the h.265 protocol distributed system, wherein the establishing of the filter chart in the state of acquiring the first frame data, and the outputting of the audio/video data information matched with the first frame data to the decoder specifically include:
establishing a filter diagram in a state of acquiring the first frame data, and establishing a time axis matched with a transmitting end;
and outputting audio and video data information matched with the first frame data to a decoder according to the time axis.
Preferably, the above information output method based on h.265 protocol distributed system further includes:
and the decoder outputs audio and video data information matched with the first frame data to a multimedia display based on a video stream transmission protocol.
In still another aspect, the present invention further provides an information output system based on an h.265 protocol distribution system, including,
the source filter is used for receiving video stream data sent by a sending end in an activated state and reading current image information parameters in the video stream data;
the first frame data forming unit is used for forming first frame data based on the video stream data matched with the current image information parameter under the condition that the current image information parameter is matched with a preset image parameter;
and the filter chart forming unit is used for establishing a filter chart in the state of acquiring the first frame data and outputting audio and video data information matched with the first frame data to a decoder.
Preferably, the information output system based on the h.265 protocol distribution system further includes:
and the conversion filter discards the data packet matched with the preset parameter notification when the conversion filter receives the preset parameter notification.
Preferably, the information output system based on the h.265 protocol distribution system, wherein the filter graph forming unit includes,
the time axis builder is used for building a filter chart in a state of acquiring the first frame data and building a time axis matched with the sending end;
and the output device outputs the audio and video data information matched with the first frame data to a decoder according to the time axis.
Preferably, the information output system based on the h.265 protocol distribution system further includes:
and the decoder outputs audio and video data information matched with the first frame data to a multimedia display based on a video stream transmission protocol.
In another aspect, the present invention further provides a server, where the server includes:
one or more processors;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the above-mentioned information output methods based on the h.265 protocol distributed system.
In still another aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the information output method based on the h.265 protocol distributed system.
In the invention, the sending end sends a section of video stream data with the quality obviously lower than the normal image quality in advance in the mode, so that the decoder finishes the initialization operation as soon as possible, and the initialization delay is reduced. And under the state that the current image information parameter is matched with the preset image parameter, the first frame data is formed based on the video stream data matched with the current image information parameter, and the non-first frame data is discarded in this way, so that the cache before the decoder searches the first frame data is eliminated, and the positioning delay of the first frame data is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic flow chart of an information output method based on an h.265 protocol distributed system in an embodiment of the present invention;
fig. 2 is a schematic flow chart of an information output method based on an h.265 protocol distributed system in an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example one
The audio and video transmission process has a plurality of reasons for the delay, wherein one of the delay reasons is the delay caused by the starting of a decoder, after an audio and video transmitter receives a first frame image, a filter chart establishes a display time axis consistent with a transmitting end, the display time axis is always kept inaccurate relative to the reference of the time axis of the transmitting end in the subsequent playing, if the initial delay of the first frame data occurs, the delay of the first frame data is superposed into the subsequent image in a constant mode to cause the delay to occur, namely the initial delay of the first frame data is smaller, the delay of the stream playing is reduced accordingly. However, for the H.265/AVC decoder, this initial latency is much larger than the average decoding latency. Resulting in the initial delay from the main source and the first frame data positioning delay and decoder initialization delay. Based on the method, the invention provides an information output method based on an H.265 protocol distributed system.
The present embodiment provides an information output method based on an h.265 protocol distributed system, where the output method includes the following steps:
as shown in fig. 1, in step S110, in a state where the source filter is activated, receiving video stream data sent by a sending end, and reading a current image information parameter in the video stream data; the video stream data at least includes video data of normal image quality and video data of abnormal image quality (wherein the video data of abnormal image quality is video data obviously lower than the normal image quality).
Step S120, forming first frame data based on video stream data matched with the current image information parameter under the state that the current image information parameter is matched with a preset image parameter; the preset image parameter is an image parameter of normal image quality. Specifically, in a state where the current image information parameter does not match a preset image parameter, the image data matched with the image information parameter is discarded, and in a state where the current image information parameter matches a preset image parameter, the first frame data is formed based on the video stream data matched with the current image information parameter. In this way, the sending end sends a section of video stream data with the quality obviously lower than the normal image quality in advance, so that the decoder completes the initialization operation as soon as possible, and the initialization delay is reduced. In addition, the mode discards the non-first frame data, eliminates the cache before the decoder searches the first frame data, and reduces the positioning delay of the first frame data.
And step S130, establishing a filter chart in the state of acquiring the first frame data, and outputting audio and video data information matched with the first frame data to a decoder.
In the invention, the sending end sends a section of video stream data with the quality obviously lower than the normal image quality in advance in the mode, so that the decoder finishes the initialization operation as soon as possible, and the initialization delay is reduced. And under the state that the current image information parameter is matched with the preset image parameter, the first frame data is formed based on the video stream data matched with the current image information parameter, and the non-first frame data is discarded in this way, so that the cache before the decoder searches the first frame data is eliminated, and the positioning delay of the first frame data is reduced.
Example two
In the prior art, besides the first frame data positioning delay and the decoder initialization delay generated by the decoder, the quality control message is also easy to generate delay, specifically, most decoders in the h.265 protocol distributed system support quality message processing, in the case of less than ideal signal data transmission, the audio/video transmitter may transmit a quality message notification to the decoder, and in the state of excessive quality message notification reception, the decoder may be actively blocked, and unnecessary delay is generated. Based on the above, the invention further provides an information output method based on the H.265 protocol distributed system, and particularly,
as shown in fig. 2, in step S210, the accepting packet is configured in a state of the preset parameter notification, and the conversion filter discards the packet matching with the preset parameter notification. Wherein, the preset parameter notification is a quality message notification. In this way, the decoder blocks all quality message notifications from feeding back quality messages, further improving the real-time performance of decoder transmission.
Step S220, receiving video stream data sent by a sending end under the condition that a source filter is activated, and reading current image information parameters in the video stream data; wherein, the video stream data at least includes video data of normal image quality and video data of abnormal image quality (wherein, the video data of abnormal image quality is video data obviously lower than the normal image quality).
Step S230, forming first frame data based on video stream data matched with the current image information parameter in a state that the current image information parameter matches a preset image parameter; the preset image parameter is an image parameter of normal image quality. Specifically, in a state where the current image information parameter does not match a preset image parameter, the image data matched with the image information parameter is discarded, and in a state where the current image information parameter matches a preset image parameter, the first frame data is formed based on the video stream data matched with the current image information parameter.
And S240, establishing a filter chart in the state of acquiring the first frame data, and outputting audio and video data information matched with the first frame data to a decoder.
As a further preferred embodiment, the above information output method based on an h.265 protocol distributed system, wherein the establishing of the filter graph in the state where the first frame data is acquired, and the outputting of the audio/video data information matched with the first frame data to the decoder specifically includes:
step S2401, establishing a filter chart in a state of acquiring the first frame data, and establishing a time axis matched with a sending end;
and S2402, outputting audio and video data information matched with the first frame data to a decoder according to the time axis.
And S2403, outputting the audio and video data information matched with the first frame data to a multimedia display by the decoder based on a video stream transmission protocol. In the mode, the audio and video data are supported to be transmitted simultaneously, the audio and video data do not need to be separated, and a demultiplexing program in the prior art is saved, namely the time delay caused by the demultiplexing program in the prior art is saved. The structure is simplified, the resource consumption is low, the data loss caused by demultiplexing is avoided, and the transmission stability is improved.
EXAMPLE III
In another aspect, the present invention further provides an information output system based on the h.265 protocol distributed system, wherein,
the source filter is used for receiving video stream data sent by a sending end in an activated state and reading current image information parameters in the video stream data;
the first frame data forming unit is used for forming first frame data based on video stream data matched with the current image information parameter under the condition that the current image information parameter is matched with a preset image parameter;
and the filter chart forming unit is used for establishing a filter chart in the state of acquiring the first frame data and outputting audio and video data information matched with the first frame data to a decoder.
As a further preferred embodiment, the information output system based on the h.265 protocol distributed system further includes:
the conversion filter receives a preset parameter notification state; and discarding the data packet matched with the preset parameter notification by the conversion filter.
As a further preferred embodiment, the information output system based on the h.265 protocol distribution system as described above, wherein the filter graph forming unit includes,
the time axis builder is used for building a filter chart in a state of acquiring the first frame data and building a time axis matched with the sending end;
and the output device outputs the audio and video data information matched with the first frame data to a decoder according to the time axis.
As a further preferred embodiment, the information output system based on the h.265 protocol distributed system further includes:
and the decoder outputs audio and video data information matched with the first frame data to a multimedia display based on a video stream transmission protocol.
The working principle of the information output system based on the h.265 protocol distributed system is the same as that of the information output method based on the h.265 protocol distributed system, and details are not repeated here.
In another aspect, the present invention further provides a server, wherein the server includes:
one or more processors;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the above-mentioned information output methods based on the h.265 protocol distributed system.
In still another aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program is executed by a processor to implement any one of the above-mentioned information output methods based on the h.265 protocol distributed system.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Although various aspects of the invention are presented in the independent claims, other aspects of the invention comprise combinations of features from the described embodiments and/or the dependent claims with the features of the independent claims, and not solely the combinations explicitly presented in the claims.
It is noted herein that while the above describes example embodiments of the invention, these descriptions should not be viewed in a limiting sense. Rather, several variations and modifications are possible without departing from the scope of the invention as defined in the appended claims.

Claims (10)

1. An information output method based on an H.265 protocol distributed system is characterized by comprising the following steps:
receiving video stream data sent by a sending end under the state that a source filter is activated, and reading current image information parameters in the video stream data, wherein the video stream data at least comprises video data with normal image quality and video data with abnormal image quality, and the video data with abnormal image quality is video data obviously lower than the normal image quality;
forming first frame data based on the video stream data matched with the current image information parameter under the condition that the current image information parameter is matched with a preset image parameter, wherein the preset image parameter is an image parameter with normal image quality;
and establishing a filter chart in the state of acquiring the first frame data, and outputting audio and video data information matched with the first frame data to a decoder.
2. The information output method according to claim 1, wherein the method for outputting information based on an h.265 protocol distributed system receives video stream data sent by a sending end in a state that a source filter is activated, and before reading the current image information parameter in the video stream data further comprises:
the conversion filter is configured to accept packets in a preset parameter notification state, and discards packets matching the preset parameter notification, wherein the preset parameter notification is a quality message notification.
3. The information output method based on the h.265 protocol distributed system according to claim 1, wherein the establishing of the filter graph in the state where the first frame data is acquired, and the outputting of the audio/video data information matched with the first frame data to a decoder specifically includes:
establishing a filter chart in a state of acquiring the first frame data, and establishing a time axis matched with a sending end;
and outputting audio and video data information matched with the first frame data to a decoder according to the time axis.
4. The method for outputting information based on the h.265 protocol distributed system as claimed in claim 3, further comprising:
and the decoder outputs audio and video data information matched with the first frame data to a multimedia display based on a video stream transmission protocol.
5. An information output system based on an H.265 protocol distributed system, comprising:
the source filter is used for receiving video stream data sent by a sending end in an activated state and reading current image information parameters in the video stream data, wherein the video stream data at least comprises video data with normal image quality and video data with abnormal image quality, and the video data with the abnormal image quality is video data obviously lower than the normal image quality;
a first frame data forming unit, configured to form first frame data based on the video stream data matched with the current image information parameter in a state where the current image information parameter matches a preset image parameter, where the preset image parameter is an image parameter of normal image quality;
and the filter chart forming unit is used for establishing a filter chart in the state of acquiring the first frame data and outputting audio and video data information matched with the first frame data to a decoder.
6. The information output system based on the h.265 protocol distributed system as claimed in claim 5, further comprising:
and the conversion filter discards the data packet matched with the preset parameter notification when the conversion filter receives the preset parameter notification state, wherein the preset parameter notification is a quality message notification.
7. The information output system based on the h.265 protocol distributed system as recited in claim 5, wherein the filter graph forming unit comprises:
the time axis builder is used for building a filter chart in a state of acquiring the first frame data and building a time axis matched with the sending end;
and the output device outputs the audio and video data information matched with the first frame data to a decoder according to the time axis.
8. The information output system based on the h.265 protocol distributed system as claimed in claim 5, further comprising:
and the decoder outputs audio and video data information matched with the first frame data to a multimedia display based on a real-time stream transmission protocol.
9. A server, characterized in that the server comprises:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method for outputting information based on the h.265 protocol distributed system as recited in any one of claims 1-4.
10. A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing an information output method based on an h.265 protocol distributed system as recited in any one of claims 1 to 4.
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