Self-adapted error recovery device, video communication system and method based on feedback

An error recovery and self-adaptive technology, applied in the field of image information transmission and processing, can solve problems such as the decline of user visual experience and the decline of error-tolerant processing capabilities at the encoding end

Active Publication Date: 2008-06-04
ZTE CORP
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Problems solved by technology

However, in the actual communication system, there is a time delay from the feedback of the decoding state information of the decoder to the encoding end, and the time delay is related to the network condition
If the delay is large, when the encoder receives erro

Method used

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  • Self-adapted error recovery device, video communication system and method based on feedback
  • Self-adapted error recovery device, video communication system and method based on feedback
  • Self-adapted error recovery device, video communication system and method based on feedback

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Embodiment Construction

[0053] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0054] Such as figure 1 As shown, in a typical wireless video communication system, data is transmitted between the terminal and BTS / BSC / RNC through a wireless connection, and the connection between BTS / BSC / RNC is through a wired connection, including a core network or a softswitch network , and network node devices such as media gateways on the core network. During data transmission, the probability of channel errors in wireless networks is much greater than that in wired networks. Thus, in figure 1 In the typical wireless video communication system shown, the wireless connection is the main part of the data loss, such as figure 1 A and B in the two are the most prone to data loss.

[0055] The solution provided by the present invention is to introduce a new device at the BTS / BSC / RNC or media gateway—such as figure 2 The error ...

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Abstract

The invention discloses a self-adaptive error recovery device based on feedback, a video communication system and a method thereof. In the video communication system, the self-adaptive error recovery device based on feedback is added. A data receiving module in the error recovery device receives data; a wrong information processing module detects whether the received data is correct or not, or detects whether the wrong information exists in a feed back channel. If the wrong information exists, a controlling module starts an error compensating module to compensate the received wrong data and outputs the compensated data. Otherwise, the data receiving module directly outputs the normal data. The error recovery device can operate the error recovery processing within a relatively small feedback delay so as to recover the quality of damaged images of a video decoding terminal at the highest speed. The error recovery device and the method thereof can separate fault tolerance processing operation which needs relatively large computing resource from terminal decoding/encoding so as to reduce the demand on computing resources by the terminal.

Description

technical field [0001] The invention relates to the field of image information transmission and processing, in particular to an adaptive video communication system and method capable of resisting channel errors, as well as an error recovery device and method therein. Background technique [0002] With the development of wired broadband network and wireless network and the drive of user needs, multimedia technology and related applications have received more and more attention, and are considered to be one of the mainstream applications of high-speed networks in the future. Compared with traditional Internet applications such as WWW and E-mail, multimedia applications, especially video applications, have stricter real-time requirements and greater bandwidth requirements. Since most video applications use high-compression coding technology, the requirements for transmission errors are particularly stringent, but wired or wireless networks do not provide QoS (Quality of Service...

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Application Information

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IPC IPC(8): H04N7/68H04N7/64H04N19/895H04N19/89
Inventor 陈睿王宁王志英戴志军
Owner ZTE CORP
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