WO2018184189A1 - Procédé de réglage de débit de code adaptatif et système associé - Google Patents

Procédé de réglage de débit de code adaptatif et système associé Download PDF

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Publication number
WO2018184189A1
WO2018184189A1 PCT/CN2017/079667 CN2017079667W WO2018184189A1 WO 2018184189 A1 WO2018184189 A1 WO 2018184189A1 CN 2017079667 W CN2017079667 W CN 2017079667W WO 2018184189 A1 WO2018184189 A1 WO 2018184189A1
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value
resolution
module
video stream
ipc
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PCT/CN2017/079667
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English (en)
Chinese (zh)
Inventor
谭泳
陈建
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天彩电子（深圳）有限公司
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Priority to PCT/CN2017/079667 priority Critical patent/WO2018184189A1/fr
Publication of WO2018184189A1 publication Critical patent/WO2018184189A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation

Definitions

  • the present invention relates to a video stream real-time transmission method, and more particularly to a code rate adaptive adjustment method and system thereof.
  • the mainstream video transmission technology is mainly based on the RTP real-time transport stream protocol and the RTCP real-time transport stream control protocol.
  • the current mainstream video transmission technology has instability, which affects the transmission quality of the network video stream.
  • Chinese Patent 201310034273.3 discloses a method for adaptively adjusting code rate in wireless transmission, which is used for adaptive adjustment of video code rate.
  • the method comprises: obtaining image complexity parameter according to video feature type parameter of video source data; receiving and receiving end Transmitted wireless channel transmission quality information; obtain wireless transmission index parameters according to wireless channel transmission quality information; obtain target rate parameters according to wireless transmission index parameters; and query code rate control empirical data according to image complexity parameters and target rate parameters a table, obtaining an image output frame rate parameter; sending the image output frame rate parameter to the video encoding module, so that the video encoding module uses the image output frame rate parameter to output the encoded standard video data when the video source data is video encoded Rate is adjusted.
  • the invention also discloses an apparatus and system for adaptive adjustment of code rate in wireless transmission.
  • the above patent is aimed at the problem that the code rate adjustment algorithm has stable channel bandwidth requirement and low jitter resistance in the prior art, and obtains an image output frame rate parameter, and then adjusts the output bit rate, and does not combine the code rate of the video. And the packet loss rate is judged and adjusted.
  • a code rate adaptive adjustment method and the method includes:
  • step S23 If the code rate and the frame rate do not reach the upper limit, increase the frame rate and the code rate, and proceed to step S30.
  • step S24 If the code rate and the frame rate reach an upper limit, determine whether the GOP value reaches a default value, and proceeds to step S25.
  • step S26 If the GOP value does not reach the default value, decrease the GOP value, and proceed to step S30.
  • step S27 If the GOP value reaches a default value, determine whether the resolution reaches a maximum value, and proceed to step S28;
  • step S32 If the code rate and the frame rate do not reach the lower limit, reduce the frame rate and the code rate, and proceed to step S30.
  • step S33 if the code rate and the frame rate reach the lower limit value, determine whether the GOP value reaches a maximum value, and proceeds to step S34;
  • step S34 If the GOP value does not reach the maximum value, then the GOP value is adjusted upward, and the process proceeds to step S30.
  • step S35 If the GOP value reaches a maximum value, determine whether the resolution reaches a lower limit value, and proceed to step S36;
  • the code rate adaptive adjustment method further includes a switching step, performing analysis and judgment according to the received video stream, and entering a handover adjustment according to the analysis and judgment result, acquiring a new video stream and playing.
  • Step 1 The video stream transmission step, the IPC_STAE receives the video stream of the IPC_AP, and transmits the video stream to the mobile terminal;
  • Step 2 data processing step, the mobile terminal receives the video stream, performs data statistics, and feeds back the statistical result to the IPC_STAE, the IPC_STAE analyzes the data sent by the mobile terminal, and sends the analyzed result to the IPC_AP;
  • Step 3 The triggering step, the IPC_AP automatically triggers the rate adjustment adaptively, and the IPC_AP sends a video stream switching request to the IPC_STAE;
  • Step 4 request processing step, after receiving the video code stream switching request, the IPC_STAE sends the video code stream switching request to the mobile terminal, and the mobile terminal performs video code stream switching analysis, and the mobile terminal sends a video code stream switching response to the IPC_STAE;
  • Step 5 The handover response processing step, the IPC_STAE sends the video code stream switching response to the IPC_AP, and determines whether the adjustment direction of the video stream quality is a rising direction step in the IPC_AP to obtain a new video stream.
  • Step 6 The playing step sends a new video stream to the IPC_STAE, and the IPC_STAE sends the video stream to the mobile terminal for video playback.
  • the invention also provides a code rate adaptive adjustment system, comprising a judging unit, a rising processing unit and a non-rising processing unit;
  • the determining unit is configured to determine whether the adjustment direction of the video stream quality is an upward direction
  • the rising processing unit is configured to determine and adjust other elements if the adjustment direction of the video stream quality is in the rising direction, and perform judgment processing on the current code rate, frame rate, GOP value, and resolution, according to the determining process. As a result, a corresponding notification is made;
  • the non-rising processing unit When the direction of adjustment of the video stream quality is not the rising direction, the non-rising processing unit performs a determination process on the current code rate, the frame rate, the GOP value, and the resolution, and performs a corresponding notification based on the result of the determination process.
  • the rising processing unit includes a preliminary processing module, an upper limit determining module, a non-upper processing module, a default value determining module, a non-default value processing module, a maximum value determining module, a maximum processing module, and a non-maximum Value processing module and notification module;
  • the preliminary processing module is configured to judge and adjust other elements
  • the upper limit determining module is configured to determine whether the code rate and the frame rate reach an upper limit
  • the non-upper limit processing module is configured to increase a frame rate and a code rate if a code rate and a frame rate do not reach an upper limit
  • the default value determining module is configured to determine whether the GOP value reaches a default value if the code rate and the frame rate reach an upper limit;
  • the non-default value processing module is configured to reduce a GOP value if the GOP value does not reach a default value
  • the maximum value determining module is configured to determine that the GOP value reaches a default value and determine whether the resolution reaches a maximum value
  • the maximum processing module is configured to notify that the flow parameter has reached an optimal condition if the resolution reaches a maximum value
  • the non-maximum processing module is configured to: if the resolution does not reach a maximum value, report a notification that the resolution needs to be manually adjusted, and manually adjust the resolution;
  • the notification module is configured to report a notification of setting a flow parameter.
  • the non-rising processing unit includes a lower limit determining module, a non-lower limit processing module, a GOP value maximum determining module, a GOP value maximum processing module, a resolution lower limit determining module, a resolution lower limit processing module, and a resolution lower limit.
  • the lower limit determining module is configured to determine whether the code rate and the frame rate reach a lower limit value
  • the non-lower limit processing module is configured to reduce the frame rate and the code rate if the code rate and the frame rate do not reach the lower limit value;
  • the GOP value maximum judging module is configured to determine whether the GOP value reaches a maximum value if the code rate and the frame rate reach a lower limit value;
  • the GOP value maximum processing module is configured to: if the GOP value does not reach a maximum value, up-regulate the GOP value;
  • the resolution lower limit determining module is configured to determine whether the resolution reaches a lower limit value if the GOP value reaches a maximum value
  • the lower resolution processing module is configured to notify that the flow parameter has been unadjustable if the resolution reaches a lower limit value
  • the non-lower limit module of the resolution is used for notifying that the resolution does not reach the lower limit value, and then reporting the need to manually lower the resolution, and manually lowering the resolution.
  • the code rate adaptive adjustment system further includes a switching unit, configured to perform analysis and judgment according to the received video stream, and enter a handover adjustment according to the analysis and judgment result, acquire a new video stream, and play .
  • the switching unit includes a video stream transmission module, a data processing module, a trigger module, a request processing module, a handover response processing module, and a play module.
  • the video stream transmission module is configured to receive, by the IPC_STAE, a video stream of the IPC_AP, and transmit the video stream to the mobile terminal;
  • the data processing module is configured to: after the mobile terminal receives the video stream, perform data statistics, and feed back the statistical structure to the IPC_STAE, and the IPC_STAE analyzes the data sent by the mobile terminal, and sends the analyzed result to the IPC_AP;
  • the triggering module is configured to automatically trigger the rate adjustment of the IPC_AP, and the IPC_AP sends a video stream switching request to the IPC_STAE, or manually triggers the rate adjustment on the mobile terminal;
  • the request processing module is configured to send the video code stream switching request to the mobile terminal after the PC_STAE receives the video code stream switching request, and the mobile terminal performs the video code stream switching analysis, and the mobile terminal sends the video code stream switching response to the IPC_STAE;
  • the handover response processing module is configured to send, by the IPC_STAE, a video code stream switching response to the IPC_AP to obtain a new video stream;
  • the playing module is configured to send a new video stream to the IPC_STAE, and the IPC_STAE sends the video stream to the mobile terminal for video playback.
  • the beneficial effects of the present invention compared with the prior art are: the code rate adaptive adjustment method of the present invention, by judging the adjustment direction of the video quality, according to the judgment result, the current resolution, the code rate and the frame rate, and the GOP
  • the value judgment process realizes adaptive adjustment of the code rate, thereby achieving a code rate of the output which is the best match with the current network bandwidth, and improving the transmission success rate of the more complete video stream.
  • FIG. 1 is a flow chart of a code rate adaptive adjustment method according to an embodiment of the present invention
  • FIG. 2 is a block diagram of a specific process of adjusting a video stream quality in a rising direction according to an embodiment of the present invention
  • FIG. 3 is a specific process block diagram of a video stream quality adjustment direction that is not a rising direction according to an embodiment of the present invention
  • FIG. 4 is a P2P and mobile terminal-IPC signal interaction diagram 1 (automatic trigger) according to a code rate adaptive adjustment method according to an embodiment of the present invention
  • FIG. 5 is a second diagram of a P2P interaction with a mobile terminal-IPC signal according to a code rate adaptive adjustment method according to an embodiment of the present invention (manual triggering);
  • FIG. 6 is a structural block diagram of a code rate adaptive adjustment system according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a rising processing unit according to an embodiment of the present invention.
  • FIG. 8 is a structural block diagram of a non-rising processing unit according to an embodiment of the present invention.
  • FIG. 9 is a structural block diagram of a switching unit according to an embodiment of the present invention.
  • FIG. 10 is a block diagram of a packet loss determination and retransmission system according to an embodiment of the present invention.
  • the code rate adaptive adjustment method provided in this embodiment can be used in the process of video stream transmission to achieve the best match between the output rate and the current network bandwidth.
  • the bit rate which improves the transmission success rate of a more complete video stream.
  • a rate adaptive adjustment method comprising the following specific steps:
  • the above-mentioned code rate adaptive adjustment method realizes adaptive adjustment of the code rate by judging the adjustment direction of the video quality, judging the current resolution, the code rate, the frame rate, and the GOP value according to the judgment result. Therefore, the output code rate is matched with the best match rate under the current network bandwidth, and the transmission success rate of the more complete video stream is improved.
  • step S23 If the code rate and the frame rate do not reach the upper limit, increase the frame rate and the code rate, and proceed to step S30.
  • step S24 If the code rate and the frame rate reach an upper limit, determine whether the GOP value reaches a default value, and proceeds to step S25.
  • step S26 If the GOP value does not reach the default value, decrease the GOP value, and proceed to step S30.
  • step S27 If the GOP value reaches a default value, determine whether the resolution reaches a maximum value, and proceed to step S28;
  • the reduced GOP value increases the proportion of the I frame in the total number of frames.
  • step S32 If the code rate and the frame rate do not reach the lower limit, reduce the frame rate and the code rate, and proceed to step S30.
  • step S33 if the code rate and the frame rate reach the lower limit value, determine whether the GOP value reaches a maximum value, and proceeds to step S34;
  • step S34 If the GOP value does not reach the maximum value, then the GOP value is adjusted upward, and the process proceeds to step S30.
  • step S35 If the GOP value reaches a maximum value, determine whether the resolution reaches a lower limit value, and proceed to step S36;
  • the code rate adaptive adjustment method further includes a switching step of performing analysis and judgment according to the received video stream, and entering a handover adjustment according to the analysis and determination result, acquiring a new video stream and playing.
  • the switching step includes the following steps:
  • Step 1 The video stream transmission step, the IPC_STAE receives the video stream of the IPC_AP, and transmits the video stream to the mobile terminal;
  • Step 2 data processing step, the mobile terminal receives the video stream, performs data statistics, and feeds back the statistical result to the IPC_STAE, the IPC_STAE analyzes the data sent by the mobile terminal, and sends the analyzed result to the IPC_AP;
  • Step 3 The triggering step, the IPC_AP automatically triggers the rate adjustment adaptively, and the IPC_AP sends a video stream switching request to the IPC_STAE;
  • Step 4 request processing step, after receiving the video code stream switching request, the IPC_STAE sends the video code stream switching request to the mobile terminal, and the mobile terminal performs video code stream switching analysis, and the mobile terminal sends a video code stream switching response to the IPC_STAE;
  • Step 5 The handover response processing step, the IPC_STAE sends the video code stream switching response to the IPC_AP, and determines whether the adjustment direction of the video stream quality is a rising direction step in the IPC_AP to obtain a new video stream.
  • Step 6 The playing step sends a new video stream to the IPC_STAE, and the IPC_STAE sends the video stream to the mobile terminal for video playback.
  • the code rate adaptive adjustment may be manually triggered on the mobile terminal.
  • the embodiment further provides a code rate adaptive adjustment system, including a determining unit 10, a rising processing unit 20, and a non-rising processing unit 30.
  • the determining unit 10 is configured to determine whether the adjustment direction of the video stream quality is a rising direction.
  • the rising processing unit 20 is configured to determine and adjust other elements if the adjustment direction of the video stream quality is in the rising direction, and determine the current code rate, the frame rate, the GOP value, and the resolution, and determine the processing result according to the determination. , for the corresponding notification.
  • the non-rising processing unit 30 When the video stream quality adjustment direction is not the rising direction, the non-rising processing unit 30 performs a determination process on the current code rate, the frame rate, the GOP value, and the resolution, and performs a corresponding notification based on the determination processing result.
  • the rising processing unit 20 includes a preliminary processing module 21, an upper limit determining module 22, a non-upper limit processing module 23, a default value determining module 24, a non-default value processing module 25, and a maximum value determining module 26, and a maximum value.
  • the preliminary processing module 21 is used for judging and adjusting other elements.
  • the upper limit determining module 22 is configured to determine whether the code rate and the frame rate reach an upper limit.
  • the non-upper limit processing module 23 is configured to increase the frame rate and the code rate if the code rate and the frame rate do not reach the upper limit.
  • the default value judging module 24 is configured to determine whether the GOP value reaches a default value if the code rate and the frame rate reach an upper limit.
  • the non-default value processing module 25 is configured to reduce the GOP value if the GOP value does not reach the default value.
  • the maximum value judging module 26 is configured to determine that the GOP value reaches a default value and determine whether the resolution reaches a maximum value.
  • the maximum value processing module 27 is configured to notify that the flow parameter has reached an optimal condition if the resolution reaches a maximum value.
  • the non-maximum processing module 28 is configured to report the resolution that needs to be manually adjusted if the resolution does not reach the maximum value, and manually adjust the resolution.
  • the notification module 29 is configured to report the notification of setting the stream parameter.
  • the non-rising processing unit 30 includes a lower limit determining module 31, a non-lower limit processing module 32, a GOP value maximum determining module 33, a GOP value maximum processing module 34, a resolution lower limit determining module 35, and a lower resolution processing.
  • Module 36 and resolution non-lower limit module 37 are included in the non-rising processing unit 30.
  • the lower limit determining module 31 is configured to determine whether the code rate and the frame rate have reached a lower limit value.
  • the non-lower limit processing module 32 is configured to reduce the frame rate and the code rate if the code rate and the frame rate do not reach the lower limit value.
  • the GOP value maximum judging module 33 is configured to determine whether the GOP value reaches a maximum value if the code rate and the frame rate reach a lower limit value.
  • the GOP value maximum processing module 34 is configured to up-regulate the GOP value if the GOP value does not reach the maximum value.
  • the resolution lower limit determining module 35 is configured to determine whether the resolution reaches a lower limit value if the GOP value reaches a maximum value.
  • the lower resolution processing module 36 is configured to notify that the flow parameter has not been adjusted if the resolution reaches the lower limit.
  • the resolution non-lower limit module 37 for the resolution not reaching the lower limit value, reports a notification that the resolution needs to be manually decreased, and performs manual drop resolution.
  • the above-mentioned rate adaptive adjustment system further includes a switching unit 40, configured to perform analysis and judgment according to the received video stream, and enter a handover adjustment according to the analysis judgment result, acquire a new video stream, and play.
  • a switching unit 40 configured to perform analysis and judgment according to the received video stream, and enter a handover adjustment according to the analysis judgment result, acquire a new video stream, and play.
  • the switching unit 40 includes a video stream transmission module 41, a data processing module 42, a trigger module 43, a request processing module 44, a handover response processing module 45, and a playback module 46.
  • the video stream transmission module 41 is configured to receive the video stream of the IPC_AP by the IPC_STAE, and transmit the video stream to the mobile terminal.
  • the data processing module 42 is configured to perform data statistics after the mobile terminal receives the video stream, and feed back the statistical structure to the IPC_STAE, and the IPC_STAE analyzes the data sent by the mobile terminal, and sends the analyzed result to the IPC_AP.
  • the triggering module 43 is configured to automatically trigger the rate adjustment of the IPC_AP, and the IPC_AP sends a video stream switching request to the IPC_STAE, or manually triggers the rate adaptation on the mobile terminal.
  • the request processing module 44 is configured to send the video code stream switching request to the mobile terminal after the PC_STAE receives the video code stream switching request, and the mobile terminal performs the video code stream switching analysis, and the mobile terminal sends the video code stream switching response to the IPC_STAE.
  • the handover response processing module 45 is configured to send a video code stream switching response to the IPC_AP by the IPC_STAE to acquire a new video stream.
  • the playing module 46 is configured to send a new video stream to the IPC_STAE, and the IPC_STAE sends the video stream to the mobile terminal for video playback.
  • the judgment unit 10 determines the adjustment direction of the video quality, and according to the determination result, the current resolution, the code rate, the frame rate, and the GOP by the rising processing unit 20 and the non-rising processing unit 30.
  • the value judgment process realizes adaptive adjustment of the code rate, thereby achieving a code rate of the output which is the best match with the current network bandwidth, and improving the transmission success rate of the more complete video stream.
  • the present invention further provides another solution, a packet loss determination and retransmission system, to ensure that the output data is complete and effective video stream data, thereby improving the video presentation quality and improving the video.
  • a packet loss determination and retransmission system to ensure that the output data is complete and effective video stream data, thereby improving the video presentation quality and improving the video.
  • the scheme can be used in parallel or independently with the above-described rate adaptive adjustment system.
  • the packet loss determination and retransmission system includes a packet sequence reordering module, a packet loss determination module, a packet loss feedback module, a framing buffer management module, and a state feedback module, wherein the packet sequence reordering module and the relocation module
  • the packet determination module is connected, the packet loss determination module is connected to the packet loss feedback module, the packet loss feedback module is connected to the group frame buffer management module, and the group frame buffer management module is connected to the state feedback module.
  • the packet loss determination and retransmission system further includes a data statistics module, a data analysis module, a framing buffer module, a receive data cache module, a packet filtering module, a receiving module, a sending module, a packaging module, a sending data cache module, a packet loss retransmission module, a signaling processing module, a parameter configuration module, a data input module, a data output module, a status query module, and a status reporting module, wherein the data statistics module and the packet loss determination module, the data analysis module, and the status respectively Querying the module connection; the data analysis module is respectively connected to the state feedback module and the state reporting module, and the receiving data buffering module is respectively connected to the framing buffer module, the packet filtering module and the packet sequence reordering module, wherein the framing frame
  • the cache module is connected to the data output module, the packet filter module is connected to the receiving module, the sending module is connected to the packet loss retransmission module and the packaging module, and the packaging module and the data input
  • the above code rate adaptive adjustment system and a packet loss determination and retransmission system are all based on the RTCP streaming control protocol for signal transmission.

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  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de réglage de débit de code adaptatif et un système associé. Le procédé consiste à : déterminer si la direction de réglage de la qualité de flux vidéo est une direction montante : si la direction de réglage de la qualité de flux vidéo est une direction montante, déterminer et régler d'autres facteurs, déterminer le débit de code, la fréquence d'images, la valeur de GOP et la résolution actuels, et en fonction du résultat de détermination, effectuer une notification correspondante ; et si la direction de réglage de la qualité de flux vidéo n'est pas une direction montante, déterminer le débit de code, la fréquence d'images, la valeur de GOP et la résolution actuels, et en fonction du résultat de la détermination, effectuer une notification correspondante. La présente invention détermine la direction de réglage de la qualité de flux vidéo, détermine la résolution, le débit de code, la fréquence des images et la valeur de GOP actuels en fonction du résultat de la détermination, et règle de manière adaptative le débit de code, délivrant ainsi en sortie un débit de code correspondant au mieux à la bande passante du réseau actuelle, et améliorant le taux de réussite de transmission d'un flux vidéo plus complet.
PCT/CN2017/079667 2017-04-07 2017-04-07 Procédé de réglage de débit de code adaptatif et système associé WO2018184189A1 (fr)

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CN116614393B (zh) * 2023-07-21 2023-11-28 中融云数(北京)技术有限公司 一种基于rtc通信的弱网场景带宽估计方法及系统

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