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IMPROVEMENTS IN SPECTRUM BAND PERCEPTIVE DUPLICATING CHARACTERISTIC AND ASSOCIATED METHODS FOR CODING HIGH-FREQUENCY RECOVERY BY ADAPTIVE ADDITION OF MINIMAL NOISE LEVEL AND LIMITING NOISE SUBSTITUTION
IMPROVEMENTS IN SPECTRUM BAND PERCEPTIVE DUPLICATING CHARACTERISTIC AND ASSOCIATED METHODS FOR CODING HIGH-FREQUENCY RECOVERY BY ADAPTIVE ADDITION OF MINIMAL NOISE LEVEL AND LIMITING NOISE SUBSTITUTION
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机译：通过自适应增加最小噪声水平和限制噪声替代来编码高频恢复的谱带感知复制特征和相关方法的改进
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摘要
FIELD: coding and decoding systems. SUBSTANCE: proposed method for improving source signal coding system includes following steps: evaluation of minimal source-signal noise level that functions as measure of difference between spectral envelope found by points of local minima of source signal spectral presentation; evaluation of other spectral envelope found by points of local maxima of source-signal spectral presentation; multiplexing of coded signal and minimal noise level to produce output signal of coder. EFFECT: provision for adding and controlling noise levels in the course of their high-frequency recovery in decoder. 16 cl, 9 dwg
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