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

A discrete cosine transform and low-overhead technology, applied in the field of low-overhead multi-standard discrete cosine transform circuits, can solve the problems of multiple hardware resources and DCT circuits that do not fully consider hardware sharing, and achieve the effect of reducing logic resources

Active Publication Date: 2017-11-03
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0047] The design idea of ​​the present invention is: the present invention is based on the hardware algorithm that document [1] proposes, according to figure 2 The method matrix is ​​decomposed as shown, and the calculation result of 1D-FDCT mainly depends on U·X E and V·X O conclusion. Moreover, from matrix U·X E and V·X O In terms of the type and number of calculations required, U·X E and V·X O belong to similar matrices, such as image 3 shown. Therefore, the present invention saves area overhead by customizing the hardware circuit structure of the processing unit; at the same time, by introducing a "stage-level" pipeline structure, the calculation efficiency is further improved, and the demand for input and ou...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/625H04N19/42
Inventor 杨海钢贾瑞陈锐林郁王新刚郭珍红
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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