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Circuit for realizing direct two dimension discrete small wave change

A two-dimensional discrete wavelet and circuit technology, applied in the direction of instrumentation, computing, image data processing, etc., can solve problems such as inappropriate biorthogonal wavelet transform, high hardware complexity and system output delay, and achieve easy design and implementation , Low power consumption, the effect of reducing power consumption

Inactive Publication Date: 2005-03-02
HUAZHONG UNIV OF SCI & TECH
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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

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  • 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

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Embodiment Construction

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

[0017] according to figure 1The technical scheme of the paper gives a general structure diagram of VLSI design suitable for all finite length filter wavelet transforms. In this embodiment, the lossy wavelet filter recommended in the JPEG2000 standard—CDF(9 / 7) biorthogonal wavelet transform 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 example, first according to 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 st...

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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 in particular relates to the hardware realization of direct two-dimensional discrete wavelet transform. Background technique [0002] Due to its multi-resolution and zoom characteristics in the time-frequency domain, wavelet transform has been more and more widely used in signal analysis, image processing, image compression and other fields. 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 kind of data density operation. In order to meet the needs of real-time signal processing, the hardware implementation of wavelet transform is of great significance. Therefore, many researchers have proposed a large number of wavelet transform algorithms and hardware structure designs in recent years. The implementation of wavelet transform can be divided into two categories: one is based ...

Claims

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Application Information

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IPC IPC(8): G06T9/00
Inventor 熊承义田金文柳健
Owner HUAZHONG UNIV OF SCI & TECH
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