Method and device for recuperating original image data in video decoder

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...

AI Technical Summary

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 are completed in the motion compensation unit as the bottleneck of the video codec pipeline, which greatly increases the system delay and seriously affects the coding efficiency.

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