High-speed real-time processing arithmetic entropy coding system based on JPEG2000

A real-time processing and entropy coding technology, applied in the field of image processing, can solve problems such as chip design difficulties, low processing speed, and increased implementation complexity, to overcome complex operations and serial operations, improve coding speed and efficiency, and avoid Effects of coding system pauses
CN101820549AInactive Publication Date: 2010-09-01XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2010-09-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-speed real-time processing arithmetic entropy coding system based on JPEG2000, mainly solving the problem that the traditional coding system has high complexity and low coding speed. The coding system comprises a probability interval value predictor, a code value predictor, a code stream cache and an output selector, wherein the probability interval value predictor judges the type of a coded identification according to input dual context code pairs and sends an updated probability interval value and a code necessary parameter to the code value predictor; the code value predictor updates the code value, judges a current uniformization type, selects different uniformization processors for uniformization operation, respectively caches four types of code streams into the code stream cache according to bytes, and sequentially serially outputs the parallel input code streams according to a special priority order through the output selector. The invention has the advantages of high coding speed and low complexity and can be used for image compression coding of various high-speed digital equipment, particularly for the coding of a high-speed real-time satellite remote sensing image.
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Description

technical field

[0001] The invention belongs to the technical field of image processing and relates to compression coding, in particular to an arithmetic entropy coding system involving high-speed real-time processing, which is used for image compression coding of various digital devices, especially high-speed real-time satellite image compression coding. Background technique

[0002] With the development of multimedia and network technology and its application in medical imaging, remote sensing images and digital image / video transmission, the existing still image compression standard JPEG can no longer meet the requirements of current practical applications. In November 2000, a new still image compression standard JPEG2000 was formulated. One of the core technologies of this standard is to use the arithmetic entropy coding method to encode the data after wavelet transformation, so as to realize the compression processing of image data.

[0003] The basic coding process of ...

Claims

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