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Anti-error code image coding and decoding method based on distributive source encoding

A technology of distributed information sources and decoding methods, applied in the field of computer multimedia, can solve problems such as code stream errors, and achieve the effect of strong anti-error performance and improved error correction ability.

Inactive Publication Date: 2007-06-27
TSINGHUA UNIV
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Problems solved by technology

[0007] In wireless, the code stream is easily disturbed by noise and makes mistakes. Traditional image and video coding methods are obviously not suitable for direct application in wireless transmission.

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  • Anti-error code image coding and decoding method based on distributive source encoding
  • Anti-error code image coding and decoding method based on distributive source encoding

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Embodiment Construction

[0027] An error-resistant image encoding and decoding method based on distributed source coding proposed by the present invention is described in detail in conjunction with the accompanying drawings and embodiments as follows:

[0028] An error-resistant image encoding and decoding method based on distributed source coding proposed by the present invention, the encoding and decoding method is as follows.

[0029] Described coding method, as shown in Figure 1, comprises the following steps:

[0030] 1) Decompose the Laplacian pyramid on the image X to be coded to obtain a low-resolution image and a residual image;

[0031] 2) Encode the low-resolution image to generate code stream B 1 (Using the traditional image coding method), the residual image is directly discarded without any processing;

[0032] 3) Transform and quantize the image X to be coded, and then divide the quantized values ​​into bit planes;

[0033] 4) Channel coding is performed on each bit plane to generate...

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Abstract

The invention relates to a method for anti-error encoding and decoding image based on the distributed source encodings, which includes: it decomposes the encoding image X by using Laplace pyramid to achieve a image with a low resolution and a residual image. Then, it encodes the image with a low resolution to achieve code stream B1 and directly discards the residual image. Then, it transforms X and divides the quantified value into sliced planes. Then, it carries out channel coding about each plane to achieve checking bit and multiplex them into checking bit flow B2. The decoding method is a reverse process of the encoding.

Description

technical field [0001] The invention belongs to the technical field of computer multimedia, in particular to image codec technology. Background technique [0002] The rapid development of wireless communication technology makes it possible to transmit images and videos with large amounts of data in a wireless environment. Since wireless bandwidth resources and data storage resources are limited, these images and video data must be compressed before transmission and storage to reduce the amount of data. [0003] Academia and industry have shown great concern to this issue, and have formulated image coding standards such as JPEG and JPEG2000 for images, and MPEG-1, MPEG-2, MPEG-4, H.261, H.263, H.264 and other video coding standards. [0004] Huffman coding, the core technology in JPEG image coding, is a prefix variable-length coding. The so-called variable length code is that the length of the code word compiled is different. The so-called prefix code is for any code word...

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Application Information

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IPC IPC(8): H04N7/64H04N19/89
Inventor 戴琼海杨峰丁贵广
Owner TSINGHUA UNIV
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