发明名称 |
УСТРОЙСТВО МАСШТАБИРУЕМОГО КОДИРОВАНИЯ И СПОСОБ МАСШТАБИРУЕМОГО КОДИРОВАНИЯ |
摘要 |
There is provided a scalable encoding device capable of realizing a bandwidth scalable LSP encoding with high performance by improving the conversion performance from narrow band LSPs to wide band LSPs. The device includes: an autocorrelation coefficient conversion unit (301) for converting the narrow band LSPs of Mn order to an autocorrelation coefficients of Mn order; an inverse lag windowunit (302) for applying a window which has an inverse characteristic of a lag window supposed to be applied to the autocorrelation coefficients; an extrapolation unit (303) for extending the order of the autocorrelation coefficients to (Mn + Mi) order by extrapolating the inverse lag windowed autocorrelation coefficients; an up-sample unit (304) for performing an up-sample process in the autocorrelation domain which is equivalent to an up-sample process in a time domain for the autocorrelation coefficients of the (Mn +Mi) order so as to obtain autocorrelation coefficients of Mw order; a lag window unit (305) for applying a lag window to the autocorrelation coefficients of Mw order; and an LSP conversion unit (306) for converting the lag windowed autocorrelation coefficients into LSPs. |
申请公布号 |
RU2007108288(A) |
申请公布日期 |
2008.09.10 |
申请号 |
RU20070108288 |
申请日期 |
2005.09.02 |
申请人 |
МАЦУСИТА ЭЛЕКТРИК ИНДАСТРИАЛ КО., ЛТД. (JP) |
发明人 |
ЕХАРА Хироюки (JP);МОРИИ Тосиюки (JP) |
分类号 |
G10L21/04;G10L19/06 |
主分类号 |
G10L21/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|