发明名称 |
Quantization noise shaping method and apparatus |
摘要 |
A method and apparatus for shaping quantization noise generated when compressing audio data at a low bit rate is disclosed. A predetermined quantization noise threshold allowed during quantization of sampled audio data and quantization noise energy information of a quantized MDCT coefficient are received in all frequency bands of an audio frequency. The quantization noise energy of the quantized MDCT coefficient is attenuated in a predetermined number of frequency bands in which a difference between the predetermined quantization noise threshold and the quantization noise energy of the quantized MDCT coefficient is large.
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申请公布号 |
US7373293(B2) |
申请公布日期 |
2008.05.13 |
申请号 |
US20030720762 |
申请日期 |
2003.11.25 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
CHANG TAE-GYU;JANG HEUNG-YEOP |
分类号 |
G10L19/00;G10L19/02;G10L21/00 |
主分类号 |
G10L19/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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