CN102300076A - Video conference terminal dynamic packet loss compensating method and video conference terminal - Google Patents
Video conference terminal dynamic packet loss compensating method and video conference terminal Download PDFInfo
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- CN102300076A CN102300076A CN201110249244XA CN201110249244A CN102300076A CN 102300076 A CN102300076 A CN 102300076A CN 201110249244X A CN201110249244X A CN 201110249244XA CN 201110249244 A CN201110249244 A CN 201110249244A CN 102300076 A CN102300076 A CN 102300076A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/65—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
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Abstract
The invention relates to a video conference terminal dynamic packet loss compensating method and a video conference terminal. The method comprises the following steps that: packet loss times of code stream are detected; and when the packet loss times of the code stream exceed the preset times, a packet loss compensation process is started and executed. Due to the adoption of the method and the terminal, the waste of the system resource, caused by the encoding and decoding of redundant packet under the situation that the packet, is not lost can be avoided.
Description
Technical field
The present invention relates to the multimedia processing technology field, specifically is the method and the video conference terminal of the dynamic Discarded Packets compensation of video conference terminal.
Background technology
The host-host protocol that adopts in the video conferencing system is RTP (being Real-time Transport Protocol) at present, this agreement real-time requires very high, that is to say, in video conferencing system if packet loss, can not require the opposite end to resend the bag of losing, transmitting terminal can not know that packet loss has appearred in the code stream that oneself sends out yet.If this situation, the flower screen time will appear in the receiving terminal decoding, has had a strong impact on user's visual experience.
At this situation, various Discarded Packets compensation technology have appearred, wherein the most frequently used is a kind of forward error correction technique, this technology be normal sound video packets divide into groups, an amount of redundancy packet (quantity of redundancy packet is according to the decision of grouping size) is added in each grouping back, the redundancy packet coding module is at first noted the package informatin of the complete packet in front, constructs redundancy packet through special algorithm then, at last normal bag and one of redundancy packet is sent.Receiving terminal is resolved redundancy packet according to the algorithm of consulting, if normally being surrounded by in this grouping lost, constructs the bag of losing according to redundancy packet, so just can reach the effect of Discarded Packets compensation, guarantees the clear and smooth of image to greatest extent.
The Discarded Packets compensation that provides in the prior art is used and is all opened always, just can dynamically adjust the redundancy of redundancy packet, no matter how little redundancy have, the Code And Decode of redundancy packet all needs consume system resources, is not having under the situation of packet loss still to compile to separate the waste that redundancy packet causes system resource.
Summary of the invention
Main purpose of the present invention provides the method and the video conference terminal of the dynamic Discarded Packets compensation of a kind of video conference terminal, and avoiding is not having under the situation of packet loss still to compile to separate the waste that redundancy packet causes system resource.
The technical solution adopted for the present invention to solve the technical problems is:
The method of the dynamic Discarded Packets compensation of a kind of video conference terminal, it comprises:
Packet loss number of times to code stream detects;
When surpassing the number of times that presets, described code stream packet loss number of times starts and carries out the Discarded Packets compensation process.
Preferably, described startup is also carried out the Discarded Packets compensation process, specifically comprises: the packet loss that calculates described code stream;
Coding redundancy degree according to meeting bandwidth and described packet loss calculating redundancy packet;
The parameter of described redundancy packet is sent to opposite equip.;
Receive and resolve the redundancy packet that sends over after opposite equip. is encoded according to this parameter.
Preferably, after starting and carrying out the Discarded Packets compensation process, also comprise: when the number of times of packet loss surpasses the number of times that presets, close described Discarded Packets compensation process at the normal bag of described code stream.
Preferably, the described Discarded Packets compensation process of closing specifically comprises:
At the normal bag of described code stream when the number of times of packet loss surpasses the number of times that presets, stop described redundancy packet is decoded and notified opposite equip. to close the coding that redundancy packet is carried out.
Preferably, the parameter of described redundancy packet comprises: start the order of coding, the redundant arithmetic and the coding redundancy degree of coding.
The present invention also provides a kind of video conference terminal, and it comprises:
The packet loss detection unit is used for the packet loss number of times of code stream is detected;
The Discarded Packets compensation unit is used for starting and carrying out the Discarded Packets compensation process when described code stream packet loss number of times surpasses the number of times that presets.
Preferably, described Discarded Packets compensation unit comprises:
Packet loss obtains subelement, is used to calculate the packet loss of described code stream;
Redundancy is obtained subelement, is used for the redundancy according to meeting bandwidth and described packet loss calculating redundancy packet;
Parameter sends subelement, is used for the parameter of described redundancy packet is sent to opposite equip.;
Redundancy packet is resolved subelement, is used to receive and resolve the redundancy packet that sends over after opposite equip. is encoded according to this parameter.
Preferably, described video conference terminal also comprises the compensation closing unit, is used for when the number of times of packet loss surpasses the number of times that presets, closing described Discarded Packets compensation process at the normal bag of described code stream.
Preferably, described compensation closing unit is used at the normal bag of described code stream when the number of times of packet loss surpasses the number of times that presets, and stops described redundancy packet is decoded and notified opposite equip. to close the coding that redundancy packet is carried out.
Preferably, the parameter of described redundancy packet comprises: start the order of coding, the redundant arithmetic and the coding redundancy degree of coding.
Implement technical scheme of the present invention, have following beneficial effect: method provided by the invention and terminal can be according to detected code stream packet drops, start dynamically and close the Discarded Packets compensation process, avoid not having under the situation of packet loss still to compile to separate the waste that redundancy packet causes system resource, can both suitable redundancy be set according to current packet loss during each simultaneously the startup, improve the adaptivity of system.
Description of drawings
The structural representation of the video conference terminal that Fig. 1 provides for the embodiment of the invention;
The flow chart of the dynamic lost packet compensation method of video conference terminal that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is for starting and carry out the particular flow sheet of Discarded Packets compensation process among Fig. 2;
Another flow chart of the dynamic lost packet compensation method of video conference terminal that Fig. 4 provides for the embodiment of the invention;
Another structural representation of the video conference terminal that Fig. 5 provides for the embodiment of the invention;
Fig. 6 is the structural representation of Discarded Packets compensation unit among Fig. 5;
The another structural representation of the video conference terminal that Fig. 7 provides for the embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention provides the method for the dynamic Discarded Packets compensation of a kind of video conference terminal, and this method is applied in the video conference terminal system, and as shown in Figure 1, this video conference terminal comprises three parts:
Upper application module: mainly be responsible for logic control, the packet loss that reports according to the media protocol subsystem determines whether to start or stop Discarded Packets compensation, and determines suitable coding parameter;
Protocol stack subsystem: main being responsible for carried out Signalling exchange with opposite equip., and the signaling that upper application module is issued passes to the other side, simultaneously the signaling of the opposite equip. of receiving reported upper layer application;
The media protocol subsystem: the packet loss detection module of this media protocol subsystem is responsible for the code stream of receiving is detected, report upper application module behind the statistics packet loss, the redundancy encoding module of this media protocol subsystem is responsible for the coding redundancy bag, and the redundant decode module of this media protocol subsystem is responsible for the redundancy packet of decoding.
The method of the dynamic Discarded Packets compensation of this video conference terminal comprises step as shown in Figure 2:
S110, the packet loss number of times of code stream is detected;
In this step S110, the packet loss detection module of media protocol subsystem periodically reports result's (as: number of times of the packet loss of one-period, continuous packet loss etc.) of detection to upper application module;
S120, when surpassing the number of times preset, described code stream packet loss number of times starts and carries out the Discarded Packets compensation process.
As shown in Figure 3, in this step S120, described startup is also carried out the Discarded Packets compensation process, specifically comprises:
The packet loss of S121, the described code stream of calculating.
Upper application module judges that all there are packet loss in continuous 5 cycles (also can judge for periodicity more or still less, as 4,6 etc.), then enables the Discarded Packets compensation process, with 5 times average packet loss ratio as packet loss.
S122, calculate the coding redundancy degree of redundancy packet according to meeting bandwidth and described packet loss.
Among this step S122, the upper application module of this video conference terminal is according to the meeting bandwidth (bandwidth of this conference system, as 2M, 4M, 6M equiband) and above-mentioned packet loss determine the coding redundancy degree, then parameter is handed down to media protocol subsystem and protocol stack subsystem, decodes after the redundant decode module of media protocol subsystem is received this parameter.Owing to when each the startup, suitable redundancy is set, has improved the adaptivity of system according to current packet loss.
S123, described parameter is sent to opposite equip.; This parameter comprises: start the order of coding, the redundant arithmetic and the coding redundancy degree of coding.
For example, above-mentioned video conference terminal sends to opposite equip. with this parameter by signaling by the protocol interaction module of protocol stack subsystem, the protocol stack subsystem of opposite equip. is received the upper application module of this reporting parameters being given after the signaling this opposite equip., the upper application module of this opposite equip. is handed down to the media protocol subsystem of this opposite equip. with parameter, and the redundancy encoding module of this media protocol subsystem is carried out the coding of redundancy packet according to this parameter.
S124, reception are also resolved the redundancy packet that sends over after opposite equip. is encoded according to this parameter.
Local terminal equipment receives the redundancy packet after opposite equip. sends over coding, and carries out the decoding of this redundancy packet according to above-mentioned parameter by the redundant decode module.
As shown in Figure 4, in one embodiment, the startup in execution in step S120 is also carried out after the Discarded Packets compensation process, further comprises step S130, when the normal bag of described code stream when the number of times of packet loss surpasses the number of times that presets, and closes described Discarded Packets compensation process.In embodiment more specifically, close the Discarded Packets compensation process among the described step S130, specifically comprise:
At the normal bag of described code stream when the number of times of packet loss surpasses the number of times that presets, stop described redundancy packet is decoded and notified opposite equip. to close the coding that redundancy packet is carried out.
For example, above-mentioned video conference terminal is added up normal bag and redundancy packet respectively, upper application module is judged statistics, if normal bag continuously not the number of times of packet loss surpass 10 times and (also can be more times number or number of times still less, as 8 times, 12 inferior), will close this Discarded Packets compensation process.The upper application module of video conference terminal is closed coding to redundancy packet by the signaling opposite equip., and this signaling is by a parameter notice opposite equip., and this parameter is an order that stops to encode.The upper application module of opposite equip. can notify the redundancy encoding module of the media protocol subsystem of this opposite equip. to stop to carry out the coding of redundancy packet.The upper application module of video conference terminal of the present invention stops the decoding of redundancy packet by its media protocol subsystem of message informing, this message is notified by parameter, this parameter is an order that stops to decode, after the media protocol subsystem is received message, the redundant decode module of this media protocol subsystem stops the decoding of this redundancy packet.
The method that the foregoing description provides can be according to detected code stream packet drop, start dynamically and close the Discarded Packets compensation process, avoid not having under the situation of packet loss still to compile to separate the waste that redundancy packet causes system resource, can both suitable redundancy be set according to current packet loss during each simultaneously the startup, improve the adaptivity of system.
The embodiment of the invention also provides a kind of video conference terminal 200, and as shown in Figure 5, this video conference terminal 200 comprises:
Packet loss detection unit 210 is used for the packet loss number of times of code stream is detected;
Discarded Packets compensation unit 220 is used for starting and carrying out the Discarded Packets compensation process when described code stream packet loss number of times surpasses the number of times that presets.
More specifically among the embodiment, as shown in Figure 6, described Discarded Packets compensation unit 220 comprises:
Packet loss obtains subelement 221, is used to calculate the packet loss of described code stream;
Redundancy is obtained subelement 222, is used for the redundancy according to meeting bandwidth and described packet loss calculating redundancy packet;
Parameter sends subelement 223, is used for the parameter of described redundancy packet is sent to opposite equip.; This parameter comprises: start the order of coding, the redundant arithmetic and the coding redundancy degree of coding.
Redundancy packet is resolved subelement 224, is used to receive and resolve the redundancy packet that sends over after opposite equip. is encoded according to this parameter.
The workflow of embodiment of the invention video conference terminal 200 is as follows:
Packet loss detection unit 210 periodically detects the packet drop of code stream, for example: the number of times of the packet loss of one-period, continuous packet loss etc.;
Packet loss obtains subelement 221 and judges whether that all there are packet loss in continuous 5 cycles (also can judge for periodicity more or still less, as 4,6 etc.), if any, then enable the Discarded Packets compensation process, with 5 times average packet loss ratio as packet loss;
Redundancy is obtained subelement 222 and is determined the coding redundancy degree according to meeting bandwidth (as 2M, 4M, 6M etc.) and above-mentioned packet loss, then parameter is handed down to redundancy packet and resolves subelement 224;
Redundancy packet is resolved and is decoded after subelement 224 is received this parameter;
Parameter sends subelement 223 parameter is sent to opposite equip. by signaling, the protocol stack subsystem of opposite equip. is received the upper application module of this reporting parameters being given after the signaling this opposite equip., the upper application module of this opposite equip. is handed down to parameter the media protocol subsystem of this opposite equip., redundancy packet on this media protocol subsystem is resolved subelement, carries out the coding of redundancy packet according to this parameter.
Redundancy packet is resolved subelement 224 parsing opposite equip.s and is sended over the redundancy packet of encoding according to this parameter.Owing to when each the startup, suitable redundancy is set, has improved the adaptivity of system according to current packet loss.
In other embodiment, further, as shown in Figure 7, described video conference terminal also 200 comprises compensation closing unit 230, is used for when the number of times of packet loss surpasses the number of times that presets, closing described Discarded Packets compensation process at the normal bag of described code stream.More specifically among the embodiment, described compensation closing unit 230 is used at the normal bag of described code stream when the number of times of packet loss surpasses the number of times that presets, and stops described redundancy packet is decoded and notified opposite equip. to close the coding that redundancy packet is carried out.The parameter of above-mentioned described redundancy packet comprises: start the order of coding, the redundant arithmetic and the coding redundancy degree of coding.
For example, compensation closing unit 230 is added up normal bag and redundancy packet respectively, if normal bag continuously not the number of times of packet loss surpass (also can be more times number or number of times still less) 10 times as 8 times, 12 inferior, will close this Discarded Packets compensation process.The upper application module of video conference terminal is closed coding to redundancy packet by the signaling opposite equip., and this signaling is by a parameter notice opposite equip., and this parameter is an order that stops to encode.The upper application module of opposite equip. can notify the redundancy encoding module of the media protocol subsystem of this opposite equip. to stop to carry out the coding of redundancy packet.The upper application module of video conference terminal of the present invention stops the decoding of redundancy packet by its media protocol subsystem of message informing, this message is notified by parameter, this parameter is an order that stops to decode, after the media protocol subsystem was received message, redundancy packet was resolved the decoding that subelement 224 stops this redundancy packet.
The video conference terminal that the foregoing description provides can be according to detected code stream packet drop, start dynamically and close the Discarded Packets compensation process, avoid not having under the situation of packet loss still to compile to separate the waste that redundancy packet causes system resource, can both suitable redundancy be set according to current packet loss during each simultaneously the startup, improve the adaptivity of system.
Below only be preferred embodiment of the present invention,, all any modifications of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention not in order to restriction the present invention.
Claims (10)
1. the method for the dynamic Discarded Packets compensation of video conference terminal is characterized in that, comprising:
Packet loss number of times to code stream detects;
When surpassing the number of times that presets, described code stream packet loss number of times starts and carries out the Discarded Packets compensation process.
2. method according to claim 1 is characterized in that described startup is also carried out the Discarded Packets compensation process, specifically comprises: the packet loss that calculates described code stream;
Coding redundancy degree according to meeting bandwidth and described packet loss calculating redundancy packet;
The parameter of described redundancy packet is sent to opposite equip.;
Receive and resolve the redundancy packet that sends over after opposite equip. is encoded according to this parameter.
3. method as claimed in claim 1 or 2 is characterized in that, after starting and carrying out the Discarded Packets compensation process, also comprises: when the number of times of packet loss surpasses the number of times that presets, close described Discarded Packets compensation process at the normal bag of described code stream.
4. as method as described in the claim 3, it is characterized in that the described Discarded Packets compensation process of closing specifically comprises:
At the normal bag of described code stream when the number of times of packet loss surpasses the number of times that presets, stop described redundancy packet is decoded and notified opposite equip. to close the coding that redundancy packet is carried out.
5. as method as described in the claim 2, it is characterized in that the parameter of described redundancy packet comprises: start the order of coding, the redundant arithmetic and the coding redundancy degree of coding.
6. a video conference terminal is characterized in that, comprising:
The packet loss detection unit is used for the packet loss number of times of code stream is detected;
The Discarded Packets compensation unit is used for starting and carrying out the Discarded Packets compensation process when described code stream packet loss number of times surpasses the number of times that presets.
7. as video conference terminal as described in the claim 6, it is characterized in that described Discarded Packets compensation unit comprises:
Packet loss obtains subelement, is used to calculate the packet loss of described code stream;
Redundancy is obtained subelement, is used for the redundancy according to meeting bandwidth and described packet loss calculating redundancy packet;
Parameter sends subelement, is used for the parameter of described redundancy packet is sent to opposite equip.;
Redundancy packet is resolved subelement, is used to receive and resolve the redundancy packet that sends over after opposite equip. is encoded according to this parameter.
8. as video conference terminal as described in claim 6 or 7, it is characterized in that, also comprise the compensation closing unit, be used for when the number of times of packet loss surpasses the number of times that presets, closing described Discarded Packets compensation process at the normal bag of described code stream.
9. as video conference terminal as described in the claim 8, it is characterized in that, described compensation closing unit is used at the normal bag of described code stream when the number of times of packet loss surpasses the number of times that presets, and stops described redundancy packet is decoded and notified opposite equip. to close the coding that redundancy packet is carried out.
10. as video conference terminal as described in the claim 7, it is characterized in that the parameter of described redundancy packet comprises: start the order of coding, the redundant arithmetic and the coding redundancy degree of coding.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110249244.XA CN102300076B (en) | 2011-08-26 | 2011-08-26 | The method and video conference terminal of video conference terminal dynamic Discarded Packets compensation |
| PCT/CN2012/080176 WO2013029468A1 (en) | 2011-08-26 | 2012-08-15 | Method for dynamic packet loss compensation of conference television terminal, and conference television terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110249244.XA CN102300076B (en) | 2011-08-26 | 2011-08-26 | The method and video conference terminal of video conference terminal dynamic Discarded Packets compensation |
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| CN102300076B CN102300076B (en) | 2017-12-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013029468A1 (en) * | 2011-08-26 | 2013-03-07 | 中兴通讯股份有限公司 | Method for dynamic packet loss compensation of conference television terminal, and conference television terminal |
| CN104253968A (en) * | 2014-10-10 | 2014-12-31 | 中麦通信网络有限公司 | Mobile terminal video communication implementation method and mobile terminal video communication implementation device |
| CN105100027A (en) * | 2014-05-22 | 2015-11-25 | 宏碁股份有限公司 | Mobile electronic device and video compensating method thereof |
| CN108989734A (en) * | 2017-05-31 | 2018-12-11 | 中兴通讯股份有限公司 | A kind of video conference control method and device |
| CN110876066A (en) * | 2018-09-03 | 2020-03-10 | 中国移动通信有限公司研究院 | Adaptive forward error correction method, apparatus, medium and device |
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| WO2013029468A1 (en) * | 2011-08-26 | 2013-03-07 | 中兴通讯股份有限公司 | Method for dynamic packet loss compensation of conference television terminal, and conference television terminal |
| CN105100027A (en) * | 2014-05-22 | 2015-11-25 | 宏碁股份有限公司 | Mobile electronic device and video compensating method thereof |
| CN105100027B (en) * | 2014-05-22 | 2018-10-02 | 宏碁股份有限公司 | Electronic apparatus and video comfort method |
| CN104253968A (en) * | 2014-10-10 | 2014-12-31 | 中麦通信网络有限公司 | Mobile terminal video communication implementation method and mobile terminal video communication implementation device |
| CN108989734A (en) * | 2017-05-31 | 2018-12-11 | 中兴通讯股份有限公司 | A kind of video conference control method and device |
| CN110876066A (en) * | 2018-09-03 | 2020-03-10 | 中国移动通信有限公司研究院 | Adaptive forward error correction method, apparatus, medium and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102300076B (en) | 2017-12-05 |
| WO2013029468A1 (en) | 2013-03-07 |
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