CN101990092B - Method, device and system for controlling errors in wireless video communication system - Google Patents
Method, device and system for controlling errors in wireless video communication system Download PDFInfo
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- CN101990092B CN101990092B CN200910160678.5A CN200910160678A CN101990092B CN 101990092 B CN101990092 B CN 101990092B CN 200910160678 A CN200910160678 A CN 200910160678A CN 101990092 B CN101990092 B CN 101990092B
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- 238000004891 communication Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000012545 processing Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 abstract description 12
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
- H04N19/89—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing 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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/637—Control signals issued by the client directed to the server or network components
- H04N21/6375—Control signals issued by the client directed to the server or network components for requesting retransmission, e.g. of data packets lost or corrupted during transmission from server
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a method for controlling errors in a wireless video communication system, which comprises the following steps that: a user terminal receives wireless video data sent by the other user terminal and decodes the wireless video data; and the user terminal sends a message for indicating implementation of error control to the other user terminal after determining that the wireless video data sent by the other user terminal has decoding errors according to a decoding result, and starts to the implementation of the error control locally. The method greatly shortens the time for the wireless video communication system to perform the error control, and improves the execution efficiency of error control processes of the system, thereby greatly shortens the error diffusion time of the wireless video data, improving the quality of the wireless video data, and further effectively improving the service quality of the wireless video communication system and improving user experience. The invention simultaneously discloses the user terminal and the wireless video communication system.
Description
Technical field
The invention belongs to wireless video communication field, particularly in a kind of wireless video communication system ... the methods, devices and systems of error control.
Background technology
Under wireless transmission environments, make factor owing to there is shade, multipath fading and other interference, therefore, easily occur that wireless signal is unstable, degradation phenomenon under transmission quality, the particularly transmission of video data, is more vulnerable to the interference of extraneous factor, such as, based in the video coding algorithm of motion compensation, the correlation of most of frame of video and previous frame is very high, and the mistake of any frame all can be propagated, be diffused in follow-up some frames, thus causes the serious reduction of video quality.
In the H.324-M specification that current 3G standard uses, when regulation receiving terminal runs into video decode mistake, video fast update (Video Fast Update can be sent, VFU) request is to transmitting terminal, asking the key frame of video (i.e. I frame) to sending to refresh, making the diffusion energy of receiving terminal video decode mistake access effective improvement and control.
Such as, consult shown in Fig. 1, suppose that the transmission of video time delay of mobile phone A and B is all T1, frame of video a1 that such mobile phone A sent in the frame of video moment (i.e. Fa1 moment), after the T1 time, can be carried out video decode by mobile phone B at Fb2 reception; In like manner, mobile phone B also needs after the T1 time at the frame of video b2 that the Fb2 moment sends, and is carried out video decode by mobile phone A at Fa3 reception.If mobile phone A finds view data that frame of video b2 comprises to there is mistake when carrying out video decode, (this mistake may produce at mobile phone B transmitting terminal, also may produce at mobile phone A receiving terminal), so now, mobile phone A sends VFU and asks mobile phone B, suppose that the transmission delay that VFU asks is T2, after then mobile phone B receives VFU request, frame of video b4 is forced to carry out I frame refreshing in the Fb4 moment, namely I frame is regrouped, to isolate the mistake of carrying out produced before, and resend the new I-frame video frame b4 regrouped to mobile phone A, the I frame that frame of video b4 regroups through T1 time delay arrives mobile phone A after T1 time delay, as shown in Figure 1, the I frame that mobile phone A will be regrouped to mobile phone B at Fa5 reception, and recover normal video communication.
As can be seen from above-mentioned flow process, find that frame of video b2 makes a mistake from mobile phone A, ask to mobile phone B to transmission VFU, then to receiving the VFU response carrying the I frame regrouped, altogether need the time of T1+T2.Within this time period, mobile phone B still can send video data to mobile phone A, and the video data of these follow-up transmissions is all likely affected because of the mistake of frame of video b2, thus also occurs video decoding image mistake; Like this, just cause impact to the quality of the video data that mobile phone A receives, particularly when the value of T1 and T2 is larger, the performance of this impact is more obvious, the duration of impact is also relatively long, thus seriously reduces the service quality QoS of wireless video communication system.
Summary of the invention
The embodiment of the present invention provides method, the Apparatus and system of error control in a kind of wireless video communication system, in order to when wireless video transfer of data makes a mistake, improves the execution efficiency of its error control flow process.
Concrete technical scheme provided by the invention is as follows:
The method of error control in wireless video communication system, comprising:
User terminal receives the wireless video data of another user terminal transmission and decodes to it;
According to decoded result, described user terminal determines that the wireless video data that another user terminal described sends exist decoding error;
Described user terminal sends the message (VFU request) being used to indicate and implementing error control to another user terminal described, and start to implement error control in this locality, described enforcement error control comprises forced coding key frame of video, Video Key frame refreshing, the one or any combination reduced in code check, reduction frame per second and reference frame selection;
This message, after error control is implemented in this locality, within the setting period, if receive the message being used to indicate enforcement error control of described another user terminal transmission, then abandons by described user terminal.
A user terminal in wireless telecommunication system, comprising:
Receiving element, for receiving the wireless video data that another user terminal sends;
According to decoded result, decoding unit, for the wireless video decoding data to reception, and determines that the wireless video data that another user terminal described sends exist decoding error;
First processing unit, for generating the message (VFU request) implementing error control in order to instruction sent to another user terminal described, and after error control is implemented in this locality, within the setting period, if received the message being used to indicate enforcement error control of described another user terminal transmission by described receiving element, then this message is abandoned;
Second processing unit, for implementing error control in this locality; Wherein, when implementing error control, perform forced coding key frame of video, Video Key frame refreshing, the one or any combination reduced in code check, reduction frame per second and reference frame selection;
Transmitting element, for sending the described message (VFU request) implementing error control in order to instruction to another user terminal described.
A kind of wireless video communication system, comprise some user terminals, when arbitrary user terminal receives the wireless video data of another user terminal transmission and confirms that this wireless signal exists decoding error, the message (VFU request) being used to indicate and implementing error control is sent to another user terminal described, and implement error control in this locality, and after error control is implemented in this locality, within the setting period, if receive the message being used to indicate enforcement error control that another user terminal described sends, then this message is abandoned; Wherein, when implementing error control, perform forced coding key frame of video, Video Key frame refreshing, the one or any combination reduced in code check, reduction frame per second and reference frame selection.
In the embodiment of the present invention, adopt technique scheme to substantially reduce wireless video communication system and carry out the time that error control uses, improve the execution efficiency of the error control flow process of system, thus substantially reduce the error diffusion time of wireless video data, improve the quality of wireless video data, and then effectively improve the service quality of wireless video communication system, improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is wireless video communication schematic diagram under prior art;
Fig. 2 A is wireless video communication system Organization Chart in the embodiment of the present invention;
Fig. 2 B is user terminal functional structure chart in the embodiment of the present invention;
Fig. 3 A is wireless video communication flow figure in the embodiment of the present invention;
Fig. 3 B is wireless video communication schematic diagram in the embodiment of the present invention.
Embodiment
In wireless video communication system, in order to when wireless video transfer of data makes a mistake, improve the execution efficiency of error control flow process, in the embodiment of the present application, the arbitrary user terminal in wireless telecommunication system receives the wireless video data of another user terminal transmission and decodes to it; When described arbitrary user terminal determines that the wireless video data that another user terminal described sends exist decoding error according to decoded result, send the message (VFU request) being used to indicate and implementing error control to another user terminal described, and implement error control in this locality.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
Consult shown in Fig. 2 A, in the embodiment of the present application, some user terminals in wireless video communication system, that mobile phone is introduced for user terminal below, as shown in Figure 2 A, in the embodiment of the present application, when arbitrary mobile phone receives the wireless video data of another mobile phone transmission and confirms that this wireless signal exists decoding error, send the message being used to indicate and implementing error control to another mobile phone described, and implement error control in this locality.
Consult shown in Fig. 2 B, in the embodiment of the present application, the mobile phone in wireless video communication system comprises receiving element 200, decoding unit 201, first processing unit 202, second processing unit 203 and transmitting element 204, wherein:
Receiving element 200, for receiving the wireless video data that another mobile phone sends;
According to decoded result, decoding unit 201, for the wireless video decoding data to reception, and determines that the wireless signal that another mobile phone described sends exists decoding error;
First processing unit 202, for generating the message (VFU request) implementing error control in order to instruction sent to another mobile phone described;
Second processing unit 203, for implementing error control in this locality;
Transmitting element 204, for sending the described message implementing error control in order to instruction to another mobile phone described.
Based on said system framework, the present embodiment is introduced with interactive video data instance between mobile phone A and mobile phone B, consults shown in Fig. 3 A and Fig. 3 B, in the present embodiment, when the frame of video that mobile phone A sends makes a mistake, the detailed process that mobile phone B carries out error control is as follows:
Step 300: mobile phone A sends frame of video a1 in the Fa1 moment to mobile phone B.
Step 301: the frame of video a1 that mobile phone B sends to mobile phone A at Fb2 reception, and find that when carrying out video decode the video data that frame of video a1 comprises exists decoding error, such as, packet loss, error code, frame losing etc.
As shown in Figure 3 B, in the embodiment of the present application, suppose that the time interval between Fa1 moment and Fb2 moment is T1, so after the T1 time delay of mobile phone A transmission frame of video a1, receive this frame of video a1 from mobile phone B.
Step 302: in the Fb2 moment, mobile phone B, after decoded video frames, sends VFU to mobile phone A at once and asks b, hereinafter referred to as VFU b; Now mobile phone B is simultaneously also at the frame of video b2 sending the Fb2 moment to mobile phone A.
As shown in Figure 3 B, suppose that the transmission delay that VFU asks is T2, and T2 < T1, so, mobile phone A will at Fa4 reception to VFU b, and at Fb5 reception to frame of video b2.
Step 303: after the frame of video a1 that mobile phone B determination mobile phone A sends makes a mistake, come into effect error control in this locality.
In actual applications, when the network signal in wireless telecommunication system is bad, the signal of single mobile phone sends and Signal reception all can be affected usually.Such as, at Time division multiple access
(Time Division Synchronized Code Division Multiple Access; TD-SCDMA) in system; according to its communication standard; use the different time-gap of same frequency to divide up-downgoing physical channel; like this, up-downgoing physical channel will be very strong in the correlation of the impulse response of adjacent moment, that is to say in two mobile phones connected in built vertical communication; once one direction generation error of transmission, so also can there is error of transmission in other direction usually usually.
In view of this, in the embodiment of the present application, when mobile phone B finds that decoding error occurs the frame of video a1 that mobile phone A sends, think that the frame of video that mobile phone B sends to mobile phone A equally also video decode mistake can occur immediately, thus at once take error control means, and without the need to wait-receiving mode mobile phone A return VFU request.
And in the present embodiment, mobile phone B implements the means of error control including but not limited to following several: forced coding I frame, I block refresh, reduce code check, reduce frame per second, reference frame selection etc., can be one or several the combination in above-mentioned multiple method, not repeat them here.
Step 304: the frame of video b3 that mobile phone B is worked out after the Fb3 moment sends enforcement error control to mobile phone A.
As shown in Figure 3 B, after a T1 time delay, mobile phone A will at Fa6 reception to frame of video b3; Now, because frame of video b3 has been the frame of video regrouped after mobile phone B carries out error control, therefore, the bad problem of radio signal quality now in wireless video communication system is tentatively solved, mobile phone A receives the quality of the wireless video data of mobile phone B, has been engraved in when Fa6 in mobile phone B one direction and has recovered normal.
Step 305; Mobile phone A receives the VFU b of mobile phone B transmission in the Fa4 moment, and comes into effect error control in this locality.
And in the present embodiment, mobile phone A implements the means of error control including but not limited to following several: forced coding I frame, I block refresh, reduce code check, reduce frame per second, reference frame selection etc., can be the one or any combination in above-mentioned multiple method, not repeat them here.
Step 306: the frame of video a4 worked out after enforcement error control is mail to mobile phone B in the Fa4 moment by mobile phone A.
Step 307: as shown in Figure 3 B, after T1 time delay, mobile phone B at Fb7 reception to frame of video a4.
So far, the transmission of video data of mobile phone A sending direction have also recovered normal, and the quality of the wireless video signal between mobile phone A and mobile phone B is thoroughly recovered.
Based in above-described embodiment, in step 302 due to frame of video b2 that mobile phone B have sent to mobile phone A according to standard agreement, so, mobile phone A is after Fa5 reception to frame of video b2, if determine there is decoding error in frame of video b2, then send VFU request (hereinafter referred to as VFU a) in the Fa5 moment to mobile phone B, request mobile phone B implements error control, mobile phone B is being separated by the Fb7 reception of T2 time delay to VFU a with the Fa5 moment, and now, due in the Fb3 moment, mobile phone B just implements error control, and one direction has recovered normal video communication, therefore, mobile phone B can carry out selectivity process for the VFU a request received, so-called selectivity process, namely refer to according to actual environment, mobile phone B both can implement an error control to optimize video data again, also the process of VFU a can be abandoned in order to save system resource, because the transmission of the unidirectional wireless video data of mobile phone B the Fa6 moment (as shown in the figure, Fb6 moment corresponding to mobile phone B side) recover normal.Certainly, the prerequisite allowing mobile phone B not process the VFU a received is: the duration that the moment of reception VFUa and mobile phone B last moment of implementing error control are separated by is in the time range set, if above-mentioned two moment are separated by long, so, after mobile phone B receives VFU a, again must implement error control to ensure the transmission quality of wireless video data, not repeat them here.
Obviously, adopt aforesaid way, substantially reduce wireless video communication system and carry out the time that error control uses, improve the execution efficiency of the error control flow process of system, shorten the time that wireless video error in data is propagated, improve the transmission quality of wireless video data.Because, such as, consult shown in Fig. 3 B, if mobile phone B implements error control again after Fb7 reception to VFUa, frame of video then after recompile needs just can be transferred to mobile phone A in the Fa8 moment of T1 time delay of being separated by, so, the transmitted in both directions of the wireless video data between mobile phone A and mobile phone B needs could recover normal in the Fa8 moment, and adopt technical scheme provided by the invention, mobile phone B just comes into effect error control when the frame of video finding that mobile phone A transmits makes a mistake, then the video communication of mobile phone A side has just recovered normal in the Fa6 moment, and the video communication of mobile phone B side also to recover normal in the Fb7 moment, enforcement hinge structure for mobile phone A error control flow process shortens the time period of (T1+T2-1), this is for wireless video communication system, significantly shorten the time of implementation, thus greatly reduce the possibility that the frame of video made a mistake affects other frame of video in systems in which, effectively improve the service quality of wireless video communication system, improve Consumer's Experience.
Obviously, those skilled in the art can carry out various change and modification to the embodiment in the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments in the embodiment of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the embodiment in the present invention is also intended to comprise these and changes and modification.
Claims (3)
1. the method for error control in wireless video communication system, is characterized in that, comprising:
User terminal receives the wireless video data of another user terminal transmission and decodes to it;
When described user terminal determines that the wireless video data that another user terminal described sends exist decoding error according to decoded result, the message being used to indicate and implementing error control is sent to another user terminal described, and start to implement error control in this locality, described enforcement error control comprises forced coding key frame of video, Video Key frame refreshing, the one or any combination reduced in code check, reduction frame per second and reference frame selection;
This message, after error control is implemented in this locality, within the setting period, if receive the message being used to indicate enforcement error control of described another user terminal transmission, then abandons by described user terminal.
2. the user terminal in wireless telecommunication system, is characterized in that, comprising:
Receiving element, for receiving the wireless video data that another user terminal sends;
According to decoded result, decoding unit, for the wireless video decoding data to reception, and determines that the wireless video data that another user terminal described sends exist decoding error;
First processing unit, for generating the message implementing error control in order to instruction sent to another user terminal described, and after error control is implemented in this locality, within the setting period, if received the message being used to indicate enforcement error control of described another user terminal transmission by described receiving element, then this message is abandoned;
Second processing unit, for implementing error control in this locality; Wherein, when implementing error control, perform forced coding key frame of video, Video Key frame refreshing, the one or any combination reduced in code check, reduction frame per second and reference frame selection;
Transmitting element, for sending the described message implementing error control in order to instruction to another user terminal described.
3. a wireless telecommunication system, comprise some user terminals, it is characterized in that, when arbitrary user terminal receives the wireless video data of another user terminal transmission and confirms that these wireless video data exist decoding error, the message being used to indicate and implementing error control is sent to another user terminal described, and start to implement error control in this locality, and after error control is implemented in this locality, within the setting period, if receive the message being used to indicate enforcement error control that another user terminal described sends, then this message is abandoned; Wherein, when implementing error control, perform forced coding key frame of video, Video Key frame refreshing, the one or any combination reduced in code check, reduction frame per second and reference frame selection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160678.5A CN101990092B (en) | 2009-07-29 | 2009-07-29 | Method, device and system for controlling errors in wireless video communication system |
| PCT/CN2010/072955 WO2011012009A1 (en) | 2009-07-29 | 2010-05-19 | Method, device and system for error control in wireless video communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910160678.5A CN101990092B (en) | 2009-07-29 | 2009-07-29 | Method, device and system for controlling errors in wireless video communication system |
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| CN101990092A CN101990092A (en) | 2011-03-23 |
| CN101990092B true CN101990092B (en) | 2015-04-01 |
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| CN103533356A (en) * | 2013-10-10 | 2014-01-22 | 深圳市智美达科技有限公司 | Video data transmission method and device |
| CN110149491B (en) * | 2018-02-11 | 2021-09-28 | 腾讯科技（深圳）有限公司 | Video encoding method, video decoding method, terminal and storage medium |
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| CN1856112A (en) * | 2005-04-20 | 2006-11-01 | 华为技术有限公司 | Error elimination of compressed video transmission based on H.264 |
| CN101193093A (en) * | 2007-01-30 | 2008-06-04 | 中兴通讯股份有限公司 | Automatic recovery method and device and using system for bidirectional serial communication disconnection |
| CN101202922A (en) * | 2006-12-12 | 2008-06-18 | 华为技术有限公司 | Method and system for code error shielding |
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| KR0166725B1 (en) * | 1993-06-30 | 1999-03-20 | 김광호 | Forced intra-frame coding method |
| US20040252761A1 (en) * | 2003-06-16 | 2004-12-16 | Dilithium Networks Pty Limited (An Australian Corporation) | Method and apparatus for handling video communication errors |
| JP2006013575A (en) * | 2004-06-22 | 2006-01-12 | Matsushita Electric Ind Co Ltd | Wireless network communication apparatus and communication method |
| WO2006012911A1 (en) * | 2004-08-03 | 2006-02-09 | Fg Microtec Gmbh | Dynamic optimization of wireless real-time video data flow |
| CN101193312B (en) * | 2006-11-22 | 2011-01-05 | 中兴通讯股份有限公司 | Self-adapted error recovery device, video communication system and method based on feedback |
| CN101127919B (en) * | 2007-09-28 | 2010-08-04 | 中兴通讯股份有限公司 | A video sequence coding method |
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2009
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1856112A (en) * | 2005-04-20 | 2006-11-01 | 华为技术有限公司 | Error elimination of compressed video transmission based on H.264 |
| CN101202922A (en) * | 2006-12-12 | 2008-06-18 | 华为技术有限公司 | Method and system for code error shielding |
| CN101193093A (en) * | 2007-01-30 | 2008-06-04 | 中兴通讯股份有限公司 | Automatic recovery method and device and using system for bidirectional serial communication disconnection |
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| CN101990092A (en) | 2011-03-23 |
| WO2011012009A1 (en) | 2011-02-03 |
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