发明名称 |
SPEECH ENCODING APPARATUS AND SPEECH ENCODING METHOD |
摘要 |
Disclosed is an audio encoding device capable of adjusting a spectrum inclination of a quantized noise without changing the Formant weight. The device includes: an HPF (131) which extracts a high-frequency component of the frequency region from an input audio signal; a high-frequency energy level calculation unit (132) which calculates an energy level of the high-frequency component in a frame unit; an LPF (133) which extracts a low-frequency component of the frequency region from the input audio signal; a low-energy level calculation unit (134) which calculates an energy level of a low-frequency component in a frame unit; an inclination correction coefficient calculation unit (141) multiplies the difference between SNR of the high-frequency component and SNR of the low-frequency component inputted from an adder (140) by a constant and adds a bias component to the product so as to calculate an inclination correction coefficient ?3. The inclination correction coefficient is used for adjusting the spectrum inclination of a quantized noise.
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申请公布号 |
US2009265167(A1) |
申请公布日期 |
2009.10.22 |
申请号 |
US20070440661 |
申请日期 |
2007.09.14 |
申请人 |
PANASONIC CORPORATION |
发明人 |
EHARA HIROYUKI;MORII TOSHIYUKI;YOSHIDA KOJI |
分类号 |
G10L19/08;G10L19/14;G10L19/26 |
主分类号 |
G10L19/08 |
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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