Intraframe prediction coding optimum mode selecting method and apparatus for video coding
An intra-frame predictive encoding and prediction mode technology, applied in the field of video encoding and decoding, can solve the problems of complex calculation of encoding rate and difficulty in guaranteeing intra-frame prediction mode, and achieve the effect of improving encoding efficiency and simple calculation
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[0051] The present invention provides a method for selecting the best mode of intra-frame prediction coding for video coding, on the basis that the mode selection made is closer to the best mode selected by the original rate-distortion optimization model, effectively avoiding the rate-distortion In the optimization process, each block needs to be actually coded. On the premise that the code rate and PSNR of the code are not changed much from the full search method, the code efficiency is greatly improved.
[0052] As shown in Figure 1, it is a flow chart of the method for selecting the best mode for intra-frame prediction coding for video coding in the present invention, including steps:
[0053] S110: Construct a rate-distortion cost function based on the predicted code rate;
[0054] S120: Using the constructed function to calculate the rate-distortion cost of each prediction mode, and
[0055] S130: According to the calculation result, select the prediction mode with the s...
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