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Error concealment method of space-domain MDC (Multiple Description Coding)

A multi-description coding and error recovery technology, which is applied in television, electrical components, digital video signal modification, etc., can solve the problems of not considering the correlation between the motion of two field images, not considering the difference of image pixels, and poor adaptability, etc. , to achieve enhanced error recovery performance, improved quality, and small storage space

Active Publication Date: 2013-06-12
ZHEJIANG UNIV
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Problems solved by technology

There are some problems in the existing field image fault-tolerant method, such as the error-tolerant method does not consider the pixel difference between images, does not consider the motion correlation between two field images, and is not very adaptable to frame image sequences with different characteristics

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  • Error concealment method of space-domain MDC (Multiple Description Coding)

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Embodiment Construction

[0027] The error recovery method of the spatial domain multiple description coding of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, an error recovery method for multi-description coding in airspace includes the following steps:

[0029] (1) Input the original video stream, and decode the original video stream using spatial multiple description coding with two descriptions;

[0030] (2) Perform error detection on the two descriptions of the original video stream, and select different recovery strategies according to the type of error:

[0031] A. If both descriptions are lost, perform error recovery as follows:

[0032] A-1. If the current frame is an I frame, use the spatial interpolation method to restore it;

[0033] A-2. If it is currently a P frame, use the method of block matching to recover;

[0034] B. When one of the descriptions is lost, restore according to the following ...

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Abstract

The invention discloses an error concealment method of space-domain MDC (Multiple Description Coding). The error concealment method comprises the following steps of (1) inputting an original streaming video, and decoding the original streaming video by adopting the space-domain MDC having two descriptions; and (2) carrying out error detection on the two descriptions of the original streaming video, and judging as follows when one description is lost: a, carrying out concealment of motion information on the losing part if the losing part has time-domain correlation; b, carrying out the concealment on the losing part by adopting a space-domain interpolation method if the losing part has space-domain correlation; and c, comparing the time-domain distortion degree of the losing part with the space-domain distortion degree of the losing part: carrying out the concealment by adopting the method of step a if the time-domain distortion degree is less than the space-domain distortion degree, and carrying out the concealment by adopting the method of step b if the time-domain distortion degree is larger than or equal to the space-domain distortion degree. According to the error concealment method provided by the invention, the error concealment performance of the space-domain MDC can be enhanced.

Description

technical field [0001] The invention relates to the field of video transmission, in particular to an error recovery method for spatial multi-description coding. Background technique [0002] In multimedia applications, there are various networks. Due to the unreliability of network transmission, error-resistant coding (Error-resilient coding) and error-recovery (Error-concealment) have become urgent problems in video coding and decoding. [0003] Due to its strong error tolerance, multiple description coding has become a hot research field of fault-tolerant coding. It is mainly divided into spatial domain multiple description coding, time domain multiple description coding and frequency domain multiple description coding. [0004] Spatial multi-description coding uses the sampling algorithm in the spatial domain to divide the image into two descriptions. There is a strong correlation between the two descriptions. Therefore, when one of the descriptions is lost, the other des...

Claims

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Application Information

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IPC IPC(8): H04N7/64H04N7/26H04N7/46H04N19/89H04N19/59H04N19/65
Inventor 陈耀武徐巍炜蒋荣欣田翔
Owner ZHEJIANG UNIV
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