Pitch cycle search range setting apparatus and pitch cycle...

Details Pitch cycle search range setting apparatus and pitch cycle... Pitch cycle search range setting apparatus and pitch cycle...

2007-01-04

2009-06-02

Abebe, Daniel D (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S207000, C704S222000, C704S223000

Reexamination Certificate

active

07542898

ABSTRACT:
An apparatus sets a pitch cycle search object in pitch cycle search processing for searching for a pitch cycle included in a linear predictive residual on a per subframe basis. A pitch cycle indicator of the apparatus sequentially output spitch cycle candidates within a predetermined pitch cycle search range at integral accuracy. A memory stores an integral component of a pitch cycle selected in pitch cycle search processing of a previous subframe. An adaptive sound source vector generator sets, as the pitch cycle search object in pitch cycle search processing in a processing subframe section, a group of candidates comprising a group of integral-accuracy pitch cycle candidates output from the pitch cycle indicator and a group of fractional-accuracy pitch cycle search candidates that cover a pitch cycle near an integral component of the pitch cycle read from the previous subframe integral pitch cycle memory using fractional accuracy.

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English Language Abstract of JP 6-51800.
English Language Abstract of JP 7-225599.
English Language Abstract of JP 6-59698.
English Language Abstract of JP 6-6398.
English Language Abstract of JP 2000-330594.
English Language Abstract of JP 7-248794.
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