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All-parallel bit plane coding method for image compression

A technology of image compression and encoding method, which is applied in image communication, television, electrical components, etc., and can solve the problems of large resource consumption and high control complexity

Inactive Publication Date: 2013-03-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the encoding unit of a single bit plane adopts the schemes of [3] and [4] at the same time, which has high control complexity and consumes a lot of resources. This shortcoming is particularly prominent after hardware multiplexing for parallel encoding of bit planes

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  • All-parallel bit plane coding method for image compression
  • All-parallel bit plane coding method for image compression
  • All-parallel bit plane coding method for image compression

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and the implementation examples given by the inventor.

[0036] The present invention first removes the correlation between each bit plane, that is, obtains the significance state s of each bit plane and the first amplitude refinement state mrf through the state parameter generation unit; after being buffered by the register buffer unit, in a single bit plane, the buffer By reading the significance status information of the previous column of bits and reading the original data of the current column and the next two columns, the parallel encoding of the channel and bit plane of the current column can be completed within one encoding window; after that, only one new column needs to be read each time The data can realize the encoding cycle.

[0037] The specific implementation examples are as follows:

[0038] 1) Read in a list of wavelet coefficients, convert the...

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Abstract

The invention relates to an all-parallel bit plane coding method for image compression, in particular to a high-speed bit plane coding method which is accorded with joint photographic experts group (JPEG) 2000 image compression standard, has low memory consumption and is in all-parallel coding of a bit plane and a coding channel. In the invention, single-row bits are used as a data unit, as long as significance status information of the bits at the previous row needs to be cached and primary data of the current row and the two following rows are read, coding operation of the channel at the current row and the bit plane can be carried out in one coding window; and then each time only a new column of data needs to be read, coding circulation can be realized; a realization structure of the coding method only needs 259 periods to process 32*32 wavelet sub bands.

Description

technical field [0001] The invention relates to a fully parallel bit-plane coding method for image compression, in particular to a high-speed full-parallel coding of bit-planes and coding channels that conforms to the Joint Photographic Experts Group (JPEG) 2000 image compression standard, low memory consumption Bit-plane encoding method. Background technique [0002] At present, the latest international image compression standard JPEG2000 (reference [1]) has the qualities of intra-frame coding, good compression effect, support for region-of-interest coding and progressive transmission, and thus has been promoted in high-end digital image applications. In the process of image compression, the original image of two-dimensional discrete wavelet transform (DWT) with lifting structure is firstly used, and then the bit plane coder (BPC) is used to process the subbands of wavelet coefficients to generate context and code values ​​(CX / D), and then sent to arithmetic coding device ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/21
Inventor 刘文松王健朱恩徐龙涛
Owner SOUTHEAST UNIV