Method and device for recuperating original image data in video decoder

A video decoder and original image technology, applied in the field of video encoding and decoding, can solve the problems of affecting encoding efficiency, increasing system delay, and high complexity, and achieve the effect of reducing transposition units, avoiding resources, and reducing delay

Inactive Publication Date: 2009-07-01
CHIPNUTS TECH INC
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Problems solved by technology

The hardware implementation and application of the existing technical solutions are highly complex, and the calculation is slow, and a large number of transposition operations a

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  • Method and device for recuperating original image data in video decoder
  • Method and device for recuperating original image data in video decoder
  • Method and device for recuperating original image data in video decoder

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[0021] The pipeline architecture of the present invention in video decoding (such as figure 2 The device / module for restoring original image data provided by the second aspect of the present invention is introduced in (shown) to implement the method provided by the first aspect of the present invention.

[0022] Combine below figure 2 The pipeline architecture of the entire video decoding and the background technology to be mentioned below will be further described. In video decoding, the macro block is the basic unit, and the whole decoding is realized by pipeline. The entire pipeline architecture is divided into 4 stages, and the handshake protocol is used to achieve synchronization between stages in units of macro blocks. In the first level, the base layer bitstream is decoded to extract the original information of the macroblock and residual block, as well as the motion vector information required for inter-frame prediction. In the second stage, the residual block matrix is ...

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Abstract

The invention relates to a method and a device for reducing the transposition calculation in a video decoder through the reconstruction. The method comprises the following steps: adding residual block matrixes generated by the conversion of inverted discrete cosines and decoded, and the reconstructed predication block matrixes, so as to generate consolidated value of block matrixes; conducting the transposition on the consolidated value of block matrixes so as to generate reconstructed image data of the current macro blocks; and outputting the reconstructed image data according to the line sequence of the original image. The method has the advantages that the operation of the block matrix transposition is conducted after the pixels reconstruct units, so as to avoid the resource of a motion compensation unit, which serves as a system bottleneck, and greatly reduces the system delay.

Description

technical field [0001] The present invention relates to video codec technology, in particular to a method and device for restoring original image data in a video decoder. Background technique [0002] In many important video coding standards, such as H.264, AVS or Real standards, the decoder recovers the original image data from the compressed bit stream. The whole process is as follows, first, the entropy decoder decodes the transform coefficients and motion vectors; secondly, the transform coefficients reconstruct the residual block matrix through the inverse transformation of the frequency domain model; at the same time, the decoder generates the prediction block matrix according to the motion vector parameters and the corresponding reference frame ; Finally, the prediction block matrix is ​​added to the residual image to obtain the reconstructed image at the decoding end. [0003] Specifically, such as figure 1 As shown, when the prediction block matrix is ​​added to t...

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Application Information

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IPC IPC(8): H04N7/26H04N7/32H04N19/126H04N19/176H04N19/44H04N19/50H04N19/51H04N19/593
Inventor 罗忠祥
Owner CHIPNUTS TECH INC
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