发明名称 |
AUDIO ENCODING DEVICE AND AUDIO ENCODING METHOD |
摘要 |
<p>There is provided an audio encoding device capable of maintaining continuity of spectrum energy and preventing degradation of audio quality even when a spectrum of a low range of an audio signal is copied at a high range a plurality of times. The audio encoding device (100) includes: an LPC quantization unit (102) for quantizing an LPC coefficient; an LPC decoding unit (103) for decoding the quantized LPC coefficient; an inverse filter unit (104) for flattening the spectrum of the input audio signal by the inverse filter configured by using the decoding LPC coefficient; a frequency region conversion unit (105) for frequency-analyzing the flattened spectrum; a first layer encoding unit (106) for encoding the low range of the flattened spectrum to generate first layer encoded data; a first layer decoding unit (107) for decoding the first layer encoded data to generate a first layer decoded spectrum, and a second layer encoding unit (108) for encoding the high range of the flattened spectrum by using the first layer decoded spectrum.</p> |
申请公布号 |
WO2007037361(A1) |
申请公布日期 |
2007.04.05 |
申请号 |
WO2006JP319438 |
申请日期 |
2006.09.29 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;OSHIKIRI, MASAHIRO |
发明人 |
OSHIKIRI, MASAHIRO |
分类号 |
G10L19/02;G10L19/04;G10L21/02;G10L21/038;G10L21/04 |
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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