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Real-time video transmission method based on forward error correction encoding window expanding

A technology of forward error correction coding and transmission method, which is applied in the field of real-time video transmission, can solve problems such as long time delay, and achieve the effect of increasing performance

Inactive Publication Date: 2012-10-03
罗天明 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a real-time video transmission method based on forward error correction coding window expansion, which solves the problems of relatively long time delay caused by forward error correction coding in the real-time video transmission method in the prior art

Method used

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  • Real-time video transmission method based on forward error correction encoding window expanding
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  • Real-time video transmission method based on forward error correction encoding window expanding

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Embodiment

[0039] In this embodiment, the real-time video transmission method based on forward error correction coding (FEC) window expansion is performed according to the following steps:

[0040] (1) At the video sending end:

[0041] 1) First, at the video encoding end, when the first frame in the current group of pictures (GOP) has been collected and the video encoding is completed, the generated video data packet will be RS-encoded, and after the corresponding verification data packet is generated, immediately Send the frame video data packet and check data packet.

[0042] 2) When the second frame in the current group of pictures (GOP) has been collected and the video encoding is completed, RS encoding will be performed according to the video data packets of the first frame and the second frame, and corresponding verification data packets will be generated. Send the data packet and check data packet of the second frame.

[0043] 3) In the above step 2), when generating the RS che...

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Abstract

The invention discloses a real-time video transmission method based on forward error correction encoding window expanding. According to the method, video signals are encoded by a forward error correction encoder (FEC). The method has the following characteristics: (1) when encoding current image frame data, the forward error correction encoder uses all video data (including the video data of the current frame) before the current frame in GOP (Group Of Picture) as encoding data to generate check data packet; (2) in order to improve the error correction performance of a system to the maximum degree, the used video data packets are multiplied with a certain transformation matrix before the forward error correction encoding, so that a linear system of equations can be linearly independent at the utmost extent, and the decoding can be conducted correctly furthest; and (3) one of the realization of a transformation matrix is to rearrange the video data packets, and according to the method for rearranging the video data packets, the invention provides a method obtained by a random function, so that different random sequences can be used by different frames, and meanwhile, the extra information needs to inform a video receiving end (a video decoding end).

Description

technical field [0001] The invention belongs to the technical field of video coding and transmission, and in particular relates to a real-time video transmission method based on forward error correction coding (FEC) window expansion. Background technique [0002] Whether it is H.263, MPEG2 video coding standard, or H.264 / AVC video coding standard, all of them are transform coding based on hybrid coding method and fusion motion compensation prediction algorithm. Therefore, when the encoded video data is transmitted in an unreliable network such as the Internet, it will be affected by error diffusion, that is, a small video packet loss will cause a very serious degradation of video quality at the receiving end. [0003] At present, various video error-resilient coding techniques (error-resilient techniques) have been widely used, making it feasible to transmit video signals over unreliable networks. These video error-tolerant coding techniques include intra macroblock refresh...

Claims

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Application Information

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IPC IPC(8): H04N7/66H04N21/2383H04N21/438
Inventor 罗天明肖继民
Owner 罗天明
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