Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Circuit for realizing direct two dimension discrete small wave change

A two-dimensional discrete wavelet and circuit technology, used in instruments, computing, image data processing, etc., can solve the problems of high hardware complexity, system output delay, unsuitable biorthogonal wavelet transform, etc., to achieve easy design and implementation , low power consumption, the effect of reducing power consumption

Inactive Publication Date: 2007-01-17
HUAZHONG UNIV OF SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, its design structure is mainly designed for the characteristics of orthogonal wavelet transform, which is not suitable for biorthogonal wavelet transform. On the other hand, because it uses the traditional wavelet transform algorithm based on convolution, Therefore, it has high hardware complexity and system output delay

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Circuit for realizing direct two dimension discrete small wave change
  • Circuit for realizing direct two dimension discrete small wave change
  • Circuit for realizing direct two dimension discrete small wave change

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be described in detail below with reference to the accompanying drawings and implementation examples.

[0017] according to figure 1A general structure diagram of VLSI design suitable for all finite-length filter wavelet transforms is given. In this embodiment, the lossy wavelet filter-CDF(9 / 7) biorthogonal wavelet transform recommended in the JPEG2000 standard is used, and the proposed structure is not only suitable for this type of filter. figure 1 The circuit includes: external memory unit EM, input data serial / parallel conversion interface circuit "S / P conversion", first horizontal filter HF1, second horizontal filter HF2, first vertical filter VF1 and second vertical filter VF2.

[0018] In this embodiment, first figure 1 The proposed general structure and figure 2 The proposed direct two-dimensional 9 / 7 wavelet transform structure diagram requires the main module to be a 4-input / 4-output structure. figure 1 and figure 2 The circu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention is a circuit for realizing direction two-dimension discrete wavelet transition, which belongs to image data processing technology field, especially relates to hardware realization of direct two-dimension discrete wavelet transition. The aim is to decrease hardware cost and system delay, and it can be applied to very large scale integration circuit structure design of high speed and low power direct two-dimension discrete wavelet transition of all limit length filters, the invention includes selector, data series and parallel converting interface circuit, primary converting circuit which are connected in order electrically; the primary converting circuit is 4 input and 4 output structure, includes the first parallel filter and the second parallel filter, the first vertical filter and the second vertical filter connected to them and output coefficient regulating unit, the parallel and vertical filters are 2 input and 2 output structure, the first vertical filter and the second vertical filter output is connected to the output coefficient regulating unit; one output electric signal of the output coefficient regulating unit is connected to an external memory, the latter is outputted to one input end of the selector.

Description

technical field [0001] The invention belongs to the technical field of image data processing, and particularly relates to the hardware realization of direct two-dimensional discrete wavelet transform. Background technique [0002] Wavelet transform has been widely used in signal analysis, image processing, image compression and other fields due to its multi-resolution and zoom characteristics in time-frequency domain. And it has become an important part of many image compression standards such as the new still image compression standard JPEG2000. Wavelet transform is a data-intensive operation. In order to meet the needs of real-time signal processing, the hardware implementation of wavelet transform is of great significance. Therefore, in recent years, many researchers have proposed a large number of wavelet transform algorithms and hardware structure designs. The realization of wavelet transform can be divided into two categories: one is based on convolution operation, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00
Inventor 熊承义田金文柳健
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com