Low-overhead multi-standard 8×8 one-dimensional discrete cosine transform circuit based on resource sharing

Abstract

The present invention provides a low-overhead multi-standard 8×8 one-dimensional discrete cosine transform circuit based on hardware resource sharing, which mainly includes four processing units PE and a butterfly transform network; the processing unit includes a constant coefficient multiplier and a data distributor , two sets of accumulating units, two registers, and two selectors; the input data is multiplied by the constant coefficient multiplier to obtain the multiplication result, and the multiplication result is distributed by the data distributor, and the odd and even parts are respectively transferred to the two The group accumulation unit is output to the storage unit after the accumulation calculation of two groups of accumulation units, and then the final calculation result is transferred to the butterfly transformation network after being selected by two two-choice selectors, and received by the butterfly transformation network The signal is processed to realize the design of one-dimensional discrete cosine transform circuit. The object of the present invention is to provide a discrete cosine transform circuit structure that saves circuit logic resources and improves performance, and can quickly complete discrete cosine transform operations.

Description

technical field [0001] The present invention relates to a low-overhead multi-standard discrete cosine transform circuit based on hardware resource sharing, in particular to a circuit that can be used to perform one-dimensional discrete cosine transform (DiscreteCosine Transform, DCT) on image data of 8×8 size in the image and video field . 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 supp...

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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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