Low-expense multi-standard 8*8 one-dimensional discrete cosine transform circuit based on resource sharing

Abstract

The invention provides a low-expense multi-standard 8*8 one-dimensional discrete cosine transform circuit based on resource sharing. The circuit mainly comprises 4 processing units PE and a butterfly transformation network. Each processing unit comprises a constant coefficient multiplying unit, a data distributor, two groups of accumulation units, two registers and two either-or selectors. Input data are multiplied by the constant coefficient multiplying unit to obtain a multiplying result, the multiplying result is distributed by the data distributor, the odd portion and the even portion are transferred to two groups of accumulation units respectively to be subjected to accumulation calculation to be further output to a storage unit, then the result is selected by the two either-or selectors, and a final result is transferred to the butterfly transformation network which processed received signals to achieve design of the one-dimensional discrete cosine transform circuit. The discrete cosine transform circuit saves circuit logic resources, improves performance and can quickly finish the discrete cosine transform computing.

Description

technical field [0001] The present invention relates to a low-overhead multi-standard discrete cosine transform circuit based on hardware resource sharing, and in particular to a one-dimensional discrete cosine transform (Discrete Cosine Transform, DCT) circuit that can be used for 8×8 size image data in the field of image and video circuit. Background technique [0002] With the growth of high-end multimedia applications, the industry has proposed more and more complex algorithms and corresponding standards. In the field of video and image, in order to improve the efficiency of coding, various video coding technologies have been proposed, such as H.264 / AVC, VC-1, AVS and HEVC. As a key conversion step, the work efficiency of discrete cosine transform (Discrete Cosine Transform, DCT) often determines the efficiency of the entire coding. [0003] In fact, with the increase of video standards proposed by the industry, a unified circuit structure is required to effectively su...

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Problems solved by technology

[0022] In view of this, the purpose of the present invention is to solve the problem that the existing DCT circuit design does not fully consider hardware sharing and takes up more hardware resources, and proposes a low-overhead multi-standard 8×8 one-dimensional discrete cosine based on hardware resource sharing. Transformation circuit, which saves circuit logic resources, can quickly complete discrete cosine transform operations, and is suitable for various video coding and compression standards

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