Hardware framework for two-dimensional discrete wavelet transformation

Abstract

The invention provides a hardware framework for two-dimensional discrete wavelet transformation, which comprises a one-dimensional discrete wavelet transformation row module, a transposition module, a one-dimensional discrete wavelet transformation column module and a zoom module which are respectively connected in serial, image data are connected with the input end of the one-dimensional discrete wavelet transformation row module, and the zoom module outputs two-dimensional discrete wavelet transformation decomposing results. The framework has the advantages of high performance and low storage, and is suitable for realization of discrete wavelet transformation in JPEG2000 static image coding standards. By adopting the folding technology and the production line technology, the hardware framework provided by the invention reduces the number of operation units, shortens a key path of a system, and improves system performances. The one-dimensional discrete wavelet transformation row module and the one-dimensional discrete wavelet transformation column module in the hardware framework are scheduled by adopting row-based data flow, so that required middle caches can be greatly reduced, and further the area of an internal memory and the hardware area of the two-dimensional discrete wavelet transformation framework are reduced.

Description

technical field [0001] The invention belongs to the technical field of image data processing, relates to a very large scale integrated circuit, and is a two-dimensional discrete wavelet transform hardware architecture. 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. As the core coding algorithm of the JPEG2000 still image coding standard, the two-dimensional discrete wavelet transform algorithm is complex, computationally intensive, and requires a large cache space to store the intermediate results of two-dimensional images. In order to meet the needs of real-time processing, it is of great significance to design an efficient two-dimensional discrete wavelet transform hardware architecture. Improving system performance and reducing hardware over...

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Problems solved by technology

[0005] The problem to be solved by the present invention is: the hardware architecture control of the existing two-dimensional discrete wavelet transform applied to the JPEG2000 image coding standard is complicated, and the required pipeline registers and computing units are more

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