Design method of built-in parallel two-dimensional discrete wavelet conversion VLSI structure

A two-dimensional discrete wavelet and structure design technology, applied in computing, special data processing applications, instruments, etc., can solve the problems of increasing chip cost, limiting chip processing data speed, reducing hardware utilization, etc., achieving simple hardware structure, easy-to-achieve effects

Inactive Publication Date: 2002-10-16
XI AN JIAOTONG UNIV
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Problems solved by technology

Among the existing 2-D DWT chip structures, most of the structures have exactly the same structural design for the two stages of fast discrete wavelet transform (row filtering and column filtering). Although this reduces the control complexity, it also reduces hardware utilization...

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  • Design method of built-in parallel two-dimensional discrete wavelet conversion VLSI structure
  • Design method of built-in parallel two-dimensional discrete wavelet conversion VLSI structure
  • Design method of built-in parallel two-dimensional discrete wavelet conversion VLSI structure

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with drawings and embodiments, but the present invention is not limited to this embodiment.

[0020] According to the technical solution of the present invention, the inventor provides the embodiments of the present invention. In this embodiment, a set of biorthogonal wavelet filters in the JPEG2000 standard——Le Gall 5 / 3 biorthogonal wavelets are used.

[0021] In this embodiment, first, the multiplication operation in the filter is implemented with a shift register and an adder through the general "shift-add" technique.

[0022] Through the "shift plus" technique, the present embodiment obtains the low-pass filter y1[n] and the high-pass filter y2[n]; that is:

[0023] y1[n]=(-x[2n-2]+x[2n-1]>3

[0024] y2[n]=(-x[2n]+x[2n+1]>2

[0025] In Figure 1, Figure 1(a) is the low-pass filter representation of y1[n] in this embodiment before shifting right (3 bits), and Figure 1(b) is y2[n] in this...

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Abstract

The design method of built-in parallel two-dimensional discrete wavelet conversion VLSI structure includes: to adopt shift addition technology to change multiplication operation in filter into shift register and adder operation; to adopt sharer expression technology to reduce the number of shift register and adder for realizing the filter; to adopt filter merging technology to merge the common terms of both high-pass and low-pass filters and to realize parallel both high-pass and low-pass operation in one compact hardware structure; and to adopt filter combination merging technology to merge two 2-DDWT filters into one and to raise the hardware utilization. The present invention is one high-efficiency 2-DDWT scheme with very high hardware utilization and other advantages.

Description

[0001] 1. Field [0002] The invention belongs to the technical field of VLSI design. Specifically, it involves designing a parallel and efficient hardware structure design method of 2-D discrete wavelet transform (2-D DWT) in JPEG2000 hardware implementation. 2. Background technology [0003] In many practical systems, such as digital cameras, videophones, camcorders, and handheld computers, it is necessary to use chips to implement compression systems in consideration of speed and area requirements. Among the existing 2-D DWT chip structures, most of the structures have exactly the same structural design for the two stages of fast discrete wavelet transform (row filtering and column filtering). Although this reduces the control complexity, it also reduces Hardware utilization increases chip cost. In addition, in the current chip structure, the operation results of the high-pass filter and the low-pass filter are output in turn in each stage. This structure not only reduces...

Claims

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Application Information

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IPC IPC(8): G06F17/50H01L21/82
Inventor 郑南宁王瑞轩吴勇张光烈徐维朴
Owner XI AN JIAOTONG UNIV
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