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High-speed configurable one-dimensinal discrete small wave transformation VLSI structure

A wavelet transform and data technology, applied in the field of VLSI implementation structure, can solve the problems of data channel pipeline processing discontinuity, increasing control complexity, etc.

Inactive Publication Date: 2007-10-03
FUDAN UNIV
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Problems solved by technology

However, when the 9 / 7 wavelet transform is performed, the first calculation result needs to be fed back to the input end, which increases the complexity of the control and causes interruption of the data path pipeline processing

Method used

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  • High-speed configurable one-dimensinal discrete small wave transformation VLSI structure
  • High-speed configurable one-dimensinal discrete small wave transformation VLSI structure
  • High-speed configurable one-dimensinal discrete small wave transformation VLSI structure

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Embodiment Construction

[0016] First, Fig. 1 shows an overall schematic diagram of the structure of the present invention, in which the distribution of each sub-module is shown. The lifting operation is first introduced below.

[0017] Pipeline-based multi-stage lifting processing

[0018] The two wavelet transforms respectively correspond to multi-level lifting operations, and such multi-level lifting processes are properly arranged and scheduled to form a multi-level pipeline processing method. Wherein, because 9 / 7 wavelet transform needs 4 levels of lifting (lifting) processing, and 5 / 3 wavelet transform only needs 2 levels of lifting (lifting) processing, so the whole processing process is a pipeline based on 4-level pipeline. The data processed at each level is buffered once and then sent to the next level for pipeline processing. When performing 5 / 3 wavelet transform, the data after two-stage pipeline processing will be output as a result. A schematic diagram of the pipeline processing is gi...

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Abstract

The prsent invention relates to a high-speed matchable VLSI implement structure for one-dimensional 5 / 3 and 9 / 7 small wave transformation. Its data channel is based on pipeline operation mode, and it is formed multistage lifting processing unit, embedded data continuation control unit and input / output control unit. The embedded data continuation control unit adopts improved embedded data continuation algorithm, and the input / output control unit can implement forward / backward rectification operation. As compared with existent techonlogy it has obvious improvement in number of storage units, access frequency of storage unit, data processing capacity of structure and theoretical power consumption analysis, etc.

Description

technical field [0001] The invention mainly relates to a VLSI realization structure of a high-speed, configurable one-dimensional 5 / 3 and 9 / 7 wavelet transform. Background technique [0002] Wavelet transform has been widely used in many fields such as multimedia and signal processing. Its basic principle is to decompose the finite energy signal into a set of basis functions, which are obtained by stretching and translating the wavelet basis functions. The advantage of wavelet transform over Fourier transform is that it has good localization properties in both time domain and frequency domain. And it is known as a mathematical microscope in the sense that it adopts progressively finer time-domain and spatial-domain sampling steps for high-frequency components. Due to these characteristics, it has been widely used in signal processing, image processing, quantum field theory, seismic exploration, speech recognition and synthesis, music, radar and CT imaging, color copying, f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/38G06F7/00G06F3/00
Inventor 朱珂华林周晓方章倩苓
Owner FUDAN UNIV
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