Method and device for compression of ADPCM image

An image compression and pixel technology, applied in image communication, image coding, image data processing, etc., can solve the problems of ineffective improvement of image quality, unsatisfactory quantization effect, complicated encoding and decoding process, etc. Improve the effect, improve the objective quality and subjective effect, the effect of simplifying the encoding and decoding process
CN101276471AActive Publication Date: 2008-10-01BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
Publication Date
2008-10-01

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Abstract

The invention relates to an ADPCM image compressing method and apparatus. According to the invention, an overflow code encoding strategy is added when a predicted error is big, external quality and active effect of encoded images are markedly improved without increasing encoding rate. In addition, the encoding / decoding process according to the invention are simplified, the compressing complexity of original images is reduced and the encoding performance is improved, thereby, the quality and active effect of the encoded images are markedly improved, the reduction of the complexity of an encoder / decoder is good for application of the algorism in a software ISP.
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Description

technical field

[0001] The invention relates to an ADPCM (Adaptive Differential Pulse Code Modulation) image compression method and device. Background technique

[0002] In a computer, an image is composed of a large number of pixels, and each pixel is represented by a set of binary numbers, and the higher the accuracy of the binary numbers, the more vivid the color of the entire image and the clearer the image, however In the process of image transmission, it is usually necessary to compress and encode the image into a code stream, and restore the original color and precision after transmission. Most of the existing technologies use ADPCM (Adaptive Differential Pulse Code Modulation), that is, Adaptive Differential Pulse Code Modulation. Modulation is used to achieve image compression, including prediction, quantization, and entropy coding processes. However, the coding used in the original ADPCM needs to be filled with complex line headers, strip headers, and pseudo-start ...

Claims

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