KLT matrix training method for video interframe coding

A training method and internal coding technology, applied in the field of KLT matrix, can solve the problems of high computational complexity and difficult to fit, and achieve the effects of improving the peak signal-to-noise ratio, stabilizing the transformation performance, and reducing the training complexity.
CN101489134AInactive Publication Date: 2009-07-22HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2009-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a Karhunen-Loeve Transform (KLT) matrix training method for a video intra-frame coding belonging to the video coding field in a signal treatment. The invention firstly picks-up a residual signal frequency spectrum under each intra-frame prediction model, then groups a residual sample and gets a candidate KLT matrix by using a conventional method, optimizes each candidate KLT matrix by using a low frequency subband preferential replacement policy and calculates the optimized transformation performance, and selects an optimization KLT matrix with best transformation performance as a transformation matrix of the residual signal under the prediction model. The invention avoids great calculation amount for real-timely training the KLT matrix during the coding, reduces an additional bit overhead for showing the training matrix, and the trained matrix has very good transformation performance.
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Description

technical field

[0001] The invention relates to the technical field of video coding in signal processing, in particular to training a KLT matrix with good transformation performance for the residual signal of intra-frame prediction. Background technique

[0002] H.264 / AVC is the latest video coding standard jointly proposed by ITU-T video coding experts and ISO / IEC motion picture expert group. Like previous coding standards (such as H.261, H.263, MPEG-1, MPEG-2, MPEG-4, etc.), H.264 / AVC also adopts a hybrid coding framework. When coding, the video image is first divided into into multiple macroblocks, and then perform prediction, transformation and entropy coding in units of macroblocks.

[0003] Prediction includes intra prediction and inter prediction. Intra-frame prediction can eliminate the spatial correlation of video sequences, while inter-frame prediction can eliminate the temporal correlation of video sequences. After the prediction, the residual data still has sp...

Claims

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