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Mixed video fault tolerance method based on multiple description encoding and error hiding

A multi-description coding, error concealment technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve the problem of not supporting QoS mechanism, increase the complexity and efficiency of the system, improve efficiency and fault tolerance, and achieve a good system. performance effect, overcoming the effect of low coding efficiency

Inactive Publication Date: 2008-05-07
NANJING UNIV
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Problems solved by technology

[0005] In addition, the current actual underlying transmission equipment generally does not support the QoS mechanism, which makes the different priority transmission required by layered coding can only be simulated by using the end-to-end inequality protection UEP mechanism at a higher level, which greatly increases the complexity and efficiency of the system

Method used

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  • Mixed video fault tolerance method based on multiple description encoding and error hiding
  • Mixed video fault tolerance method based on multiple description encoding and error hiding
  • Mixed video fault tolerance method based on multiple description encoding and error hiding

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Embodiment Construction

[0019] The hybrid video fault-tolerant method that the present invention proposes comprises the following basic steps:

[0020] 1. Multi-description encoding of input image sequences. This includes two parts: (a) obtain N image sub-sequences through sub-sampling decomposition of the image sequence; (b) encode and compress these image sub-sequences respectively. In Figure 1, the H.264 video coding standard is used, but not limited to H. .264, the same applies to other encoding standards such as MPEG.

[0021] 2. Transmission of image subsequences. The encoded multi-channel compressed code streams are sent to independent channels and sent to the corresponding decoders at the receiving end.

[0022] 3. Decoding processing of multiple descriptions. The received compressed code streams (descriptions) are sent to the video decoder for decoding processing, and at the same time, the damaged areas of the image subsequences caused by factors such as packet loss are marked.

[0023] ...

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Abstract

The present invention provides a mixed video fault-tolerance method based on multiple description coding and fault concealment. In the method, the imported image sequence firstly undergoes multiple description coding to form N independent video compression coding code streams; the N descriptions are simultaneously transmitted via independent channels; after a receiving end receives the N descriptions, the N descriptions are sent into a decoder for being decoded in order to obtain N image subsequences. According to packet loss, the decoder demarcates an image area; the image subsequences are merged, and finally, a reconstructed image sequence is obtained. Because the present invention exerts the complementarity between the multiple description coding technology and the fault concealment technology, the better effect of system performance is achieved in comparison with the sole utilization of one of the two technologies; wherein, the framework of the multiple description coding of an coding end carries out processing aiming at a sampling environment and can be combined with the newest coding standards, thus resolving the problems of the low-efficiency coding and the complex realization of most prior multiple description coding systems and the defects of the inadequate compatibility of the prior coding criteria.

Description

technical field [0001] The invention belongs to the field of video technology, and in particular relates to a comprehensive error-tolerant video coding transmission method. By adopting a multi-description coding method and an error concealment method at the coding end and the decoding end of the video coding transmission system, better system performance is obtained. Effect. technical background [0002] The robustness of wireless video transmission has become more and more prominent after the demand for wireless video applications has increased rapidly in recent years. There are Rayleigh attenuation and multi-user interference in the wireless channel, which will produce burst errors in the transmitted bit stream. International standards for video compression such as MPEG-x and H.26x are macroblock-based compression algorithms that eliminate video time redundancy through motion estimation / motion compensation, and perform discrete cosine transform on difference images to eli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/64H04N7/68H04N19/89H04N19/895
Inventor 王健季晓勇章德
Owner NANJING UNIV
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