JPEG2000 fraction bit-plane encoding method and circuit

A planar coding and bit-plane technology, applied in TV, electrical components, digital video signal modification, etc., can solve the problems of multi-circuit resources, consumption, resource waste, etc.

Inactive Publication Date: 2005-09-21
PEKING UNIV
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

Designing 43 similar and independent encoding circuits will consume more circuit resources
In actual work, many modules of the parallel encoding circuit are often in a waiting state, resulting in waste of resources

Method used

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  • JPEG2000 fraction bit-plane encoding method and circuit
  • JPEG2000 fraction bit-plane encoding method and circuit
  • JPEG2000 fraction bit-plane encoding method and circuit

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Embodiment Construction

[0112] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0113] The invention is a fast method and circuit structure for realizing fractional bit plane coding. The specific encoding operation is, firstly, according to the scanning sequence specified by the JPEG2000 algorithm, as shown in Figure 4, read in the wavelet coefficients column by column, strip by strip, and coded block by code block. and for all amplitude bits ν p Perform preprocessing to generate each amplitude bit ν p The desired importance state σ p . Then, it is stored in the current strip shift register in order of coefficients and bit planes. When the sixth wavelet coefficient enters the current strip shift register, the SP process of each amplitude bit plane starts encoding. When the 14th wavelet coefficient enters, the MP and CP process of each amplitude bit plane also starts encoding. Each bit plane is pipelined and sequentia...

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Abstract

A method for fast realizing mid-score bit plane coding and circuit structure to JPEG2000 image compression international standard, especially referring to a bit plane, process double parallel coding method and local module parallel circuit structure, which contains first making pre-process for determining the importance and amplitude thinning state of every amplitude bit plane, removing connection, making independent parallel coding, advanced coding importance transmission process then parallel coding until all 8 neighborhood coefficient passing importance transmission process, setting corresponded number of circuit module, said invention can be widely used in computer network and digital camera etc products.

Description

Technical field: [0001] The invention belongs to the fields of image data compression and video data compression, and in particular relates to a fractional bit plane coding method and a fractional bit plane coding circuit. Background technique: [0002] JPEG2000 is a new-generation image compression international standard jointly promulgated by the International Organization for Standardization ISO and the International Telecommunication Standardization Union ITU-T in 2001. Compared with the previous generation of image compression international standard JPEG, it not only has higher compression performance, but also has many new functions suitable for the network environment. For example, lossless and lossy compression are unified in the wavelet transform coding framework; code streams are uniformly organized according to various quality, resolution, and component progressive requirements; and the regions of interest in the image are preferentially coded. Although the JPEG ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/41H04N19/129H04N19/174H04N19/436H04N19/48H04N19/64
Inventor 许超
Owner PEKING UNIV
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