发明名称 |
AUDIO DECODING DEVICE AND AUDIO ENCODING DEVICE |
摘要 |
Provided is an audio decoding device capable of suppressing an information amount for a lost frame compensation process and encoding efficiency. In this device, a decoded sound source generation unit (203) generates a lost frame decoded sound source signal; a pitch pulse information decoding unit (204) decodes the pitch pulse position information and the pitch pulse amplitude information; a pitch pulse waveform learning unit (205) learns a pitch pulse learning waveform in the past frame in advance from the lost frame; a convolution unit (206) amplitude-adjusts the pitch pulse learning waveform according to the pitch pulse amplitude information, and convolutes the pitch pulse waveform into a time axis which has been amplitude-adjusted according to the pitch pulse position information; a sound source signal correction unit (207) adds or replaces the pitch pulse waveform convoluted into the time axis to the lost frame decoded sound source signal. |
申请公布号 |
EP2040251(A1) |
申请公布日期 |
2009.03.25 |
申请号 |
EP20070790618 |
申请日期 |
2007.07.11 |
申请人 |
PANASONIC CORPORATION |
发明人 |
KAWASHIMA, TAKUYA;EHARA, HIROYUKI;YOSHIDA, KOJI |
分类号 |
G10L19/00;G10L19/005;G10L19/14 |
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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