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DCT (Discrete Cosine Transform) method and DCT circuit system

A transformation coefficient and line transformation technology, applied in the field of video coding, can solve the problems of reducing the overall circuit throughput rate, wasting cycle cycles, etc., to avoid the problem of multiple reading and writing, improve efficiency, and reduce consumption.

Pending Publication Date: 2021-10-22
HANGZHOU WEIMING XINKE TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the related technology, a single-port ram is used for storage, which will result in a waste of a large number of cycles (cycles) for reading and writing to the ram between two conversions, reducing the throughput of the overall circuit

Method used

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  • DCT (Discrete Cosine Transform) method and DCT circuit system
  • DCT (Discrete Cosine Transform) method and DCT circuit system
  • DCT (Discrete Cosine Transform) method and DCT circuit system

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Embodiment Construction

[0029] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0030] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein and in the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as use...

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Abstract

The invention discloses a DCT (Discrete Cosine Transform) method and a circuit system. The method comprises the following steps of: storing residual blocks into different first storage units according to columns; after each row of residual blocks is read in parallel from each first storage unit for row transformation, writing each data in the data after row transformation into different second storage units according to a preset diagonal read-write rule; and after a column of data subjected to row transformation is read out from each second storage unit in parallel according to a diagonal read-write rule for column transformation, storing each coefficient in the obtained column of transformation coefficients in different third storage units, so that a column of transformation coefficients is read out from each third storage unit in parallel for quantization operation each time. Through the optimization design of the row-column conversion circuit and the intermediate transpose storage, especially the improvement of the read-write rule of the intermediate storage structure, the reading period of the row-column conversion circuit to the intermediate storage structure is reduced, the large throughput rate can be achieved on the small circuit area, and the circuit performance is improved.

Description

technical field [0001] The invention relates to the technical field of video coding, in particular to a DCT transform method and a DCT transform circuit system. Background technique [0002] DCT (discrete cosine) transformation refers to performing row transformation (column transformation) on the input residual block first, and then performing column transformation (row transformation). The order of the two one-dimensional transformations does not affect the final transformation result. It can be found that an intermediate transposition storage buffer is needed to temporarily store the row-transformed data during the row-column transformation process. [0003] In the related art, a single-port ram is used for storage, which causes a lot of cycles (cycles) to be wasted in reading and writing to the ram between two conversions, and reduces the throughput rate of the overall circuit. Contents of the invention [0004] The purpose of the present invention is to propose a DCT...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/625H04N19/124H04N19/423
CPCH04N19/625H04N19/124H04N19/423
Inventor 张鹏郝志坚向国庆范益波严伟贾惠柱
Owner HANGZHOU WEIMING XINKE TECH CO LTD
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