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METHOD OF ESTIMATING QUANTIZATION DISTORTION, DEVICE FOR ESTIMATING QUANTIZATION DISTORTION, AND PROGRAM FOR ESTIMATING QUANTIZATION DISTORTION AND RECORDING MEDIUM THEREFOR
METHOD OF ESTIMATING QUANTIZATION DISTORTION, DEVICE FOR ESTIMATING QUANTIZATION DISTORTION, AND PROGRAM FOR ESTIMATING QUANTIZATION DISTORTION AND RECORDING MEDIUM THEREFOR
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机译：估算量化失真的方法，估算量化失真的装置以及估算量化失真和记录介质的程序
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摘要
PROBLEM TO BE SOLVED: To improve encoding efficiency by precision improvement of prediction mode selection etc., by finding quantization distortion relatively easily.;SOLUTION: A prediction residue signal is orthogonally converted (S2) and electric power of respective coefficients after the orthogonal conversion is calculated (S3) to estimate the number of significant coefficients after quantization from the electric power of the respective coefficients (S4). Then the total of the electric power of the respective coefficients is calculated to find predicted residue electric power (S5), and the size of quantization distortion is estimated (S6) from the predicted residual electric power, the number of significant coefficients after quantization, and a quantization width. As a function for estimating the size of the quantization distortion, a function is used which includes the estimated number of the significant coefficients as a parameter to improve estimation precision of the quantization distortion.;COPYRIGHT: (C)2007,JPO&INPIT
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