发明申请
WO1995013660A1 QUANTIZATION APPARATUS, QUANTIZATION METHOD, HIGH EFFICIENCY ENCODER, HIGH EFFICIENCY ENCODING METHOD, DECODER, HIGH EFFICIENCY ENCODER AND RECORDING MEDIA
审中-公开
基本信息:
- 专利标题： QUANTIZATION APPARATUS, QUANTIZATION METHOD, HIGH EFFICIENCY ENCODER, HIGH EFFICIENCY ENCODING METHOD, DECODER, HIGH EFFICIENCY ENCODER AND RECORDING MEDIA
- 专利标题（中）：量化设备，量化方法，高效编码器，高效编码方法，解码器，高效编码器和记录媒体
- 申请号：PCT/JP1994001888 申请日：1994-11-09
- 公开(公告)号：WO1995013660A1 公开(公告)日：1995-05-18
- 发明人： SONY CORPORATION
- 申请人： SONY CORPORATION , AKAGIRI, Kenzo
- 专利权人： SONY CORPORATION,AKAGIRI, Kenzo
- 当前专利权人： SONY CORPORATION,AKAGIRI, Kenzo
- 优先权： JP5/279383 19931109; JP5/288096 19931117
- 主分类号： H03M07/30
- IPC分类号： H03M07/30
摘要：
When a time region sample or a frequency region sample of input signals such as audio signals is quantized, the present invention executes block floating processing of MDCT coefficient as a frequency region sample, for example, then executes quantization to generate a first quantized value, calculates a quantization error between this quantized value and the MDCT coefficient, and quantizes individually this quantization error for each sample to generate a second quantized value and to divide the MDCT coefficient into at least two words. In this way, the present invention can minimize the deterioration of tone quality and can secure backward compatibility.
摘要（中）：
当音频信号等输入信号的时间区域采样或频率区域采样被量化时，本发明例如执行作为频率区域采样的MDCT系数的块浮动处理，然后执行量化以产生第一量化值，计算 该量化值与MDCT系数之间的量化误差，并分别量化每个采样的量化误差，以生成第二量化值，并将MDCT系数分成至少两个字。 以这种方式，本发明可以最小化音质的劣化并且可以确保向后兼容性。