A rate-distortion optimization method
A rate-distortion optimization and rate-distortion technology, applied in the field of image/video encoding and decoding, can solve problems such as inability to adaptively optimize video content
Active Publication Date: 2016-02-03
广东广晟研究开发院有限公司
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[0009] The technical problem to be solved by the present invention is that, aiming at the defect that the rate-distortion optimization method in the prior art cannot adaptively optimize the video content, it provides a method that integrates the rate-distortion optimization at the frame layer and the rate-distortion optimization at the basic coding unit layer. , a rate-distortion optimization method that achieves the best rate-distortion optimization for video content
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[0063] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0064] Please refer to figure 1 , figure 1 It is a flow chart of the first preferred embodiment of the rate-distortion optimization method of the present invention. The rate-distortion optimization method starts with:
[0065] Step 101, obtaining the block layer Lagrangian parameters of each basic coding unit in the current frame and the frame layer Lagrangian parameters of the current frame;
[0066] Step 102, according to the block-level Lagrangian parameters of the basic coding unit and the frame-level Lagrangian parameters of the current frame, obtain the final Lagrangian parameters of each ...
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The invention relates to a rate distortion optimization method. The rate distortion optimization method comprises the steps as follows: obtaining a block layer Lagrange parameter of each basic coding unit in a current frame and a frame layer Lagrange parameter of the current frame; according to the block layer Lagrange parameter and the frame layer Lagrange parameter, obtaining a final Lagrange parameter of the each basic coding unit in the current frame; according to the final Lagrange parameter, performing rate distortion optimization coding on the each basic coding unit in the current frame to obtain a code rate value and a distortion value of the each basic coding unit in the current frame so as to obtain the code rate value and the distortion value of the current frame; and according to the code rate values and the distortion values of the at least two basic coding units in the current frame, creating a frame layer rate distortion model, and according to the frame layer rate distortion model and the code rate value and the distortion value of the current frame, estimating the frame layer Lagrange parameter of next frame. According to the rate distortion optimization method, video content is subjected to optimal rate distortion optimization through rate distortion optimization of a comprehensive frame layer and a basic coding unit layer.
Description
technical field [0001] The present invention relates to the field of image / video encoding and decoding, and more specifically relates to a rate-distortion optimization method. Background technique [0002] Using the international standard H264 as a reference, different encoding modes can be selected when encoding the basic coding unit. The selection of the encoding mode includes the selection of the intra-frame prediction mode or the inter-frame prediction mode, and may also include the division mode of the basic coding unit (for example, INTRA-4x4, INTRA-8x8, INTRA-16x16, SKIP, DIRECT, INTER-16x16, INTER-16x8, INTER-8x16, INTER-8x8, INTER-8x8 can be further divided into INTER-8x8, INTER-8x4, INTER-4x8, INTER-4x4) selection, can also include the prediction block position (eg Intra_4x4_Vertical, Intra_4x4_Horizontal, Intra_4x4_Diagonal_Down_Left, Intra_4x4_Diagonal_Down_Right, Intra_4x4_Vertical_Right, Intra_4x4_Horizontal_Down, Intra_4x4_Vertical_Left, Intra_4x4_Horizontal_...
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IPC IPC(8): H04N19/147H04N19/19
Inventor 刘伟杰徐茂何辉
Owner 广东广晟研究开发院有限公司