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Transmission error code correction method for image prediction compression coding

An error correction method and compression coding technology, which is applied in the field of transmission error correction of image predictive compression coding, can solve problems such as sink segment error diffusion, achieve image quality and real-time guarantee, improve data compression performance and transmission quality, The effect of reducing channel transmission pressure

Active Publication Date: 2014-08-06
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] The invention provides a transmission error correction method for image predictive compression coding, which solves the problem of error diffusion in the sink segment after decoding caused by channel errors, so as to reduce the data processing burden and channel transmission pressure at the source end

Method used

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  • Transmission error code correction method for image prediction compression coding
  • Transmission error code correction method for image prediction compression coding
  • Transmission error code correction method for image prediction compression coding

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Embodiment one, comprises the following steps:

[0060] (1) Image block steps:

[0061] At the source end, the input image is divided into blocks starting from the upper left end, from left to right and from top to bottom, where the bit error rate Ber=10 -8 , Compression rate Cr=4.

[0062] The size of the input image is R×C=12000×12000, the word length L of each pixel is 32 bits, the image block size S=M×N, the number of rows of the image block M=600, and the number of columns of the image block N=600, satisfying The relationship is as follows:

[0063] N ≤ 1 2 C , M ≤ Cr L × 4 × N × Ber ;

[0064] Get 400 image blocks of the same size.

[0065] (2) Check coding steps:

[0066] At the source end, each image bloc...

Embodiment 2

[0083] Embodiment two, such as figure 1 shown, including the following steps:

[0084] (1) Image block steps:

[0085] For the input image at the source end, as attached figure 1 As shown, starting from the upper left end, blocks are divided in order from left to right and from top to bottom, where the bit error rate Ber=10 -7 , Compression rate Cr=2.

[0086] figure 1 The size of the input image is R×C=1024×1024, the word length L of each pixel is 8 bits, the size of the image block is S=M×N, the number of rows of the image block M=512, and the number of columns of the image block N=512, satisfying The relationship is as follows:

[0087] N ≤ 1 2 C , M ≤ Cr L × 4 × N × Ber ;

[0088] Get 4 image blocks of the same size,...

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Abstract

The invention provides a transmission error code correction method for image prediction compression coding, and belongs to the field of image processing and data transmission. The transmission error code correction method solves the problem of error extension caused by channel error codes after an information sink end is decoded and relieves information source end data processing burden and channel transmission pressure. The method includes the steps of image blocking, code verification, channel decoding, trial and error decoding, optimal error correction image block selecting, image block characteristic judging and image restoring. According to the method, the problem of error extension caused by the channel error codes after the information sink end is decoded is effectively solved, the information source end data processing burden and the channel transmission pressure can be better relieved, and therefore the method is suitable for high-data-rate static image real-time prediction compression coding and satellite-ground transmission.

Description

technical field [0001] The invention belongs to the field of image processing and data transmission, and in particular relates to a transmission error correction method for image predictive compression coding. Background technique [0002] In the digital image, the pixel correlation in the local area is large, and the predictive coding technology uses the predictor to reduce the image entropy of the input image to realize the data compression of the image information for this redundant relationship between pixels. Due to the simple operation and low hardware requirements, a high-efficiency compression coding algorithm can be designed with a relatively simple structure. The predictive coding technology is widely used in the real-time compression and transmission processing of large data volume static images. [0003] In the process of image data compression and transmission, bit errors will cause errors in decompressed data, and the resulting image damage is related to the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/89H04N19/85H04N19/50
Inventor 胡静许珍珍代为波
Owner HUAZHONG UNIV OF SCI & TECH
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