发明名称 |
Scalable encoding device, scalable decoding device, and method thereof |
摘要 |
There is disclosed a scalable encoding device capable of increasing the conversion performance from a narrow-band LSP to a wide-band LSP (prediction accuracy when predicting the wide-band LSP from the narrow-band LSP) and realizing a high-performance band scalable LSP encoding. The device includes a conversion coefficient calculation unit (109) for calculating a conversion coefficient by using a narrow-band quantization LSP which has been outputted from a narrow-band LSP encoding unit (103) and a wide-band quantization LSP which has been outputted from a wide-band LSP encoding unit (107). The wide-band LSP encoding unit (107) multiplies the narrow-band quantization LSP with the conversion coefficient inputted from the conversion coefficient calculation unit (109) so as to convert it into a wide-band LSP. The wide-band LSP is multiplied by a weight coefficient to calculate a prediction wide-band LSP. The wide-band LSP encoding unit (107) encodes an error signal between the obtained prediction wide-band LSP and the wide-band LSP so as to obtain a wide-band quantization LSP. |
申请公布号 |
US8271272(B2) |
申请公布日期 |
2012.09.18 |
申请号 |
US20050587379 |
申请日期 |
2005.04.19 |
申请人 |
EHARA HIROYUKI;YOSHIDA KOJI;PANASONIC CORPORATION |
发明人 |
EHARA HIROYUKI;YOSHIDA KOJI |
分类号 |
G10L19/00;G10L19/06;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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