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Parallel two-dimension discrete small wave transform circuit

A two-dimensional discrete wavelet and transform circuit technology, which is used in television, electrical components, image communication, etc., can solve high hardware complexity and system output delay, is not suitable for biorthogonal wavelet transform, and has no versatility, etc. problems, to achieve the effect of easy design and implementation, less system footprint, and less system power consumption

Inactive Publication Date: 2005-03-02
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] However, the circuit design structure proposed in the past is either an optimized design for the characteristics of orthogonal wavelet transform, which is not suitable for biorthogonal wavelet transform and therefore has no versatility, or it is based on traditional convolution or traditional Lifting wavelet transform structure, so it has high hardware complexity and system output delay

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  • Parallel two-dimension discrete small wave transform circuit
  • Parallel two-dimension discrete small wave transform circuit
  • Parallel two-dimension discrete small wave transform circuit

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] according to figure 1 The technical scheme of the wavelet transform VLSI design general structure diagram is given. In this embodiment, the lossy compression wavelet filter recommended in the IPEG2000 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", horizontal filter HF, first vertical filter VF1 and second vertical filter VF2 and coefficient normalization unit.

[0020] In this example, first according to figure 1 The proposed structure requires the main module to be a 2-input / 2-output structure. figure 1 The circuit structure includes a horizontal filter and two vertical filters working in parallel, the horizontal filter is a 2-inp...

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Abstract

A parallel two-dimentional scattered small wave transformation circuit aims at reducing hardware cost and system time delay and realizing parallel quick direct two-dimentional scattered small wave transformation including a selector connected with signals a data serial / parallel conversion interface circuit, a master transform circuit in 2 out-2 in structure containing a horizontal filter, a first and a second vertical parallel filters connected with it, output of then is connected with an output coefficient flywheel unit, the horizontal filter is a 2 out-2 in structure each vertical filter is a single in and out structure an output signal of the output system flywheel unit is connected to the external memory output to an input end of the selector.

Description

technical field [0001] The invention belongs to the technical field of image data processing, in particular to the hardware realization of parallel two-dimensional discrete wavelet transform. Background technique [0002] Due to the multi-resolution and zoom characteristics in the time domain-frequency domain, wavelet transform has been more and more widely used in signal analysis, image processing, image compression and other fields, and has become an important part of many image compression standards. , such as the new still image compression standard JPEG2000. The realization of wavelet transform hardware accelerator is of great significance to satisfy the real-time requirement of operation. In recent years, many researchers have therefore proposed a large number of algorithms and hardware structure designs for wavelet transform. The implementation of wavelet transform can be divided into two categories: one is based on convolution operation, and the other is based on l...

Claims

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Application Information

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IPC IPC(8): H04N19/63H04N19/80
Inventor 熊承义田金文柳健
Owner HUAZHONG UNIV OF SCI & TECH
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