发明名称 |
Device for recovering missing frequency components |
摘要 |
A band recovering device recovers frequency components lying in a frequency band lost due to band-limitation of a sound signal. The device includes a peak-limiting amplifier for amplifying an input narrow-band signal while preventing the resulting amplified signal from exceeding a maximum amplitude. A peak-limitation detector detects the level of the amplified signal output. An amplification controller increases the amplification factor and/or the amount of amplification of the peak-limiting amplifier in accordance with the level of the amplified signal. A band recovering circuit generates, based on the amplified signal output from the peak-limiting amplifier and input narrow-band signal, a band-recovered signal including the frequency components lying in the missing band.
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申请公布号 |
US2008189102(A1) |
申请公布日期 |
2008.08.07 |
申请号 |
US20080073986 |
申请日期 |
2008.03.12 |
申请人 |
OKI ELECTRIC INDUSTRY CO., LTD. |
发明人 |
TAKADA MASASHI |
分类号 |
G10L19/00;G10L21/00;G10L11/06;G10L21/02;H04M1/00 |
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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