发明名称 |
ADAPTIVE ENCODING AND DECODING METHODS AND APPARATUSES |
摘要 |
An adaptive encoding method includes splitting an input signal into a low-frequency band signal and a high-frequency band signal; performing forward adaptive linear prediction on the low-frequency band signal and thus filtering the low-frequency band signal; selectively performing backward adaptive linear prediction or long-term prediction on the filtered low-frequency band signal according to the analysis result of the low-frequency band signal; transforming the low-frequency band signal, on which backward adaptive linear prediction or long-term prediction has been performed, into a signal in a frequency domain and quantizing the signal; and encoding the high-frequency band signal using the low-frequency band signal, on which backward adaptive linear prediction or long-term prediction has been performed, or the quantized signal. Therefore, compression efficiency of both speech and music signals can be enhanced, and a robust compression method can be provided for various audio contents at a low bit rate. |
申请公布号 |
EP2041745(A4) |
申请公布日期 |
2011.04.27 |
申请号 |
EP20070768630 |
申请日期 |
2007.07.06 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
SON, CHANG-YONG;OH, EUN-MI;CHOO, KI-HYUN;KIM, JUNG-HOE |
分类号 |
G10L19/02;G10L19/06;G10L19/09;G10L19/18;G10L19/20;G10L25/18 |
主分类号 |
G10L19/02 |
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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