SCALABLE ENCODING DEVICE AND SCALABLE ENCODING MET

专利名称：SCALABLE ENCODING DEVICE AND

SCALABLE ENCODING METHOD

发明人：EHARA, Hiroyuki Matsushita

Ind.Co,Ltd,MORII, Toshiyuki MatsushitaInd.Co,Ltd

申请号：EP05776912.7申请日：20050902公开号：EP1785985B1公开日：20080827

摘要：There is provided a scalable encoding device capable of realizing a bandwidthscalable LSP encoding with high performance by improving the conversion performancefrom narrow band LSPs to wide band LSPs. The device includes: an autocorrelationcoefficient conversion unit (301) for converting the narrow band LSPs of Mn order to anautocorrelation coefficients of Mn order; an inverse lag windowunit (302) for applying awindow which has an inverse characteristic of a lag window supposed to be applied to theautocorrelation coefficients; an extrapolation unit (303) for extending the order of theautocorrelation coefficients to (Mn + Mi) order by extrapolating the inverse lagwindowed autocorrelation coefficients; an up-sample unit (304) for performing an up-sample process in the autocorrelation domain which is equivalent to an up-sampleprocess in a time domain for the autocorrelation coefficients of the (Mn +Mi) order so asto obtain autocorrelation coefficients of Mw order; a lag window unit (305) for applying alag window to the autocorrelation coefficients of Mw order; and an LSP conversion unit(306) for converting the lag windowed autocorrelation coefficients into LSPs.

申请人：MATSUSHITA ELECTRIC IND CO LTD

地址：JP

国籍：JP

代理机构：Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät

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