VLSI (Very Large Scale Integration) design method for two-dimensional discrete wavelet transform

Abstract

The invention relates to VLSI (Very Large Scale Integration) design method for two-dimensional discrete wavelet transform. A discrete wavelet transform framework of nine seventh wavelet is employed and comprises an input data storage module, a line transform module, a transposition module, a row transform module and a zoom module, data firstly and sequentially enters the data storage module, then is sent to subsequent modules by the storage module for sequential processing and is finally output by the zoom module, all multiplication is substituted by shift operation of an addition and subtraction method, the line transform module employs a three-input wavelet transform calculation method, and the row transformer module uses a two-input calculation method.

Description

technical field [0001] The present invention belongs to the design category of Very Large Scale Integration (VLSI for short), and designs a high-performance two-dimensional discrete wavelet transform (Discrete Wavelet Transform, DWT for short) VLSI structure based on a lifting algorithm. Background technique [0002] As an effective tool for multi-resolution analysis, discrete wavelet transform has been widely used in the fields of signal processing and video compression because of its excellent time-frequency local characteristics and good decorrelation ability. Due to the large amount of calculation of DWT, in order to meet the needs of real-time processing, the algorithm must be run on the hardware circuit to improve the calculation speed. Therefore, it is of great significance to design an efficient DWT hardware architecture. Improving system performance and reducing hardware overhead have become the main considerations in the optimal design of DWT architecture. [0003...

AI Technical Summary

Problems solved by technology

[0017] Considering that the input data is mostly single-pixel data entered sequentially, the existing architecture requires a large input data storage space; on the other hand, most of the current architectures use more multipliers, resulting in low hardware efficiency. The present invention proposes a The VLSI design method of two-dimensional discrete wavelet transform, the technical scheme of the present invention is:

Images