发明名称 |
METHOD AND APPARATUS FOR ENCODING AUDIO SIGNAL AND METHOD AND APPARATUS FOR DECODING AUDIO SIGNAL |
摘要 |
<p>Provided are a methods and apparatuses for encoding/decoding an audio signal to efficiently encode/decode a harmonic envelope. The method of encoding an audio signal includes performing harmonic analysis with respect to an input signal to determine harmonic parameters with respect to harmonic signals; correlating the amplitudes of the harmonic signals to signals in a time domain instead of signals in a frequency domain; applying a time-frequency transformation operation to the amplitudes in the time domain to generate time-frequency transformed values in the frequency domain; and encoding the time-frequency transformed values. When expressing a harmonic envelope, the amplitudes of the harmonic signals are regarded as signals in the time domain so as to perform a time-frequency transformation and only a part from among the transformed values is selected to be encoded. Therefore, sound quality is not affected and coding efficiency greatly improves.</p> |
申请公布号 |
EP2126903(A1) |
申请公布日期 |
2009.12.02 |
申请号 |
EP20080712447 |
申请日期 |
2008.02.12 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
LEE, NAM-SUK;LEE, GEON-HYOUNG;OH, JAE-ONE;LEE, CHUL-WOO;JEONG, JONG-HOON |
分类号 |
G10L19/00;G10L19/08;G10L19/093 |
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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