JPEG compression system based on bin DCT algorithm

A compression system and algorithm technology, applied in the fields of digital video signal modification, electrical components, image communication, etc., can solve the problems of high overhead, high complexity, and low compression rate of image compression systems

Inactive Publication Date: 2014-01-01
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to provide a kind of JPEG compression system based on binDCT algorithm in view of the deficiencies in the prior art, which solves the problems of low compression rate, high overhead and high complexity of the current image compression system

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  • JPEG compression system based on bin DCT algorithm

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Embodiment

[0039] This embodiment has described a kind of JPEG compression system based on binDCT algorithm, and its overall structure is as follows figure 1Shown, described JPEG compression system comprises binDCT module, Zigzag module, quantization module, encoding module and controller module, in system work process,

[0040] The binDCT module performs binDCT transformation on the input 8×8 data block according to the binDCT algorithm, and sends the output data to the Zigzag module;

[0041] The Zigzag unit rearranges the input transformed matrix according to the order of Zigzag, and then sends the output data to the quantization module;

[0042] The quantization module multiplies the output data by the reciprocal matrix of the quantization matrix, and inputs the data to the encoding module after quantization is completed;

[0043] The encoding module splits the output data of the quantization module into DC components and AC components, adopts different encoding methods for the DC c...

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Abstract

The invention discloses a JPEG compression system based on a bin DCT algorithm. The key improvement of the JPEG compression system lies in a compression algorithm, and the adopted algorithm is a newly-developed bin DCT algorithm. In the algorithm, all the coefficients are in the binary system and all the multiplication is replaced into shift and addition operation so that the algorithm can be achieved more easily and faster through hardware and software. The complexity of DCT conversion is reduced through the binary DCT algorithm; compared with a traditional algorithm, the JPEG compression system has the advantages that the compression ratio of images is increased at the cost of certain image quality, and thus the JPEG compression system can be widely applied to various wireless multimedia sensor network systems similar to wireless head monitoring systems.

Description

technical field [0001] The invention relates to an image compression system, in particular to a wireless sensor network-oriented JPEG compression system with low overhead, high compression ratio and binDCT algorithm. Background technique [0002] Since the 1960s, with the continuous improvement and popularization of electronic technology and computer technology, the application of digital methods for image processing (digital image processing) has entered a period of rapid development. The digital representation of images enables high-quality transmission of image signals and facilitates image retrieval, analysis, processing, and storage. However, the representation of digital images requires a large amount of data space, so data compression coding must be performed. [0003] After more than 30 years of basic research, image compression coding research has entered a new period from the late 1980s to the early 1990s. On the one hand, it enters into practical research, and o...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04N19/124H04N19/60
Inventor刘昊赵琳
OwnerSOUTHEAST UNIV