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OPTIMIZATION OF MP3 AUDIO ENCODING BY SCALE FACTORS AND GLOBAL QUANTIZATION STEP SIZE
OPTIMIZATION OF MP3 AUDIO ENCODING BY SCALE FACTORS AND GLOBAL QUANTIZATION STEP SIZE
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机译:规模因素和全局量化步长优化MP3音频编码
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摘要
An iterative rate-distortion optimization algorithm for MPEG I/II Layer-3 (MP3) encoding based on the method of Lagrangian multipliers. Generally, an iterative method is performed such that a global quantization step size is determined while scale factors are fixed, and thereafter the scale factors are determined while the global quantization step size is fixed. This is repeated until a calculated rate-distortion cost is within a predetermined threshold. The methods are demonstrated to be computationally efficient and the resulting bit stream is fully standard compatible.
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机译:基于拉格朗日乘子法的MPEG I / II Layer-3(MP3)编码的迭代速率失真优化算法。通常,执行迭代方法,使得在固定比例因子的同时确定全局量化步长,然后在固定全局量化步长的同时确定比例因子。重复该过程,直到计算出的速率失真成本在预定阈值内。这些方法被证明具有计算效率,并且所产生的比特流完全符合标准。
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