Title:
音声符号化装置および音声符号化方法
Document Type and Number:
Japanese Patent JP5596341
Kind Code:
B2
Abstract:
Provided is an audio encoding device which can detect an optimal pitch pulse when using pitch pulse information as redundant information. The device includes: a search start decision unit (121) which decides the oldest point among a plurality of points where a pitch pulse may exist; a pitch pulse candidate selection unit (122) which defines a search range as a range between the search start point and the point preceding the point of the head of the current frame by one and selects a decoding sound source vector having a large amplitude in this search range as a pitch pulse position candidate; a selector switch (125) which successively switches a plurality of pitch pulse position candidates inputted from a pitch pulse candidate selection unit (122) for output to a pulse sequence generation unit (123) and an error minimization unit (124); a pulse sequence generation unit (123) which generates as a pulse sequence, a vector generated as an adaptive codebook component from the pitch pulse in the current frame when a pitch pulse is set to be a pitch pulse position candidate inputted from the selector switch (125).
Inventors:
Hiroyuki Ehara
Application Number:
JP2009502461A
Publication Date:
September 24, 2014
Filing Date:
February 29, 2008
Export Citation:
Assignee:
Panasonic Intellectual Property Corporation オブ U. S. Panasonic Intellectual Property Corporation ofAmerica
International Classes:
G10L19/00; G10L19/005; G10L19/09; G10L19/16; G10L25/90
Domestic Patent References:
| JP2005513539A | 2005-05-12 | |||
| JPH07160295A | 1995-06-23 |
Foreign References:
| WO2005040749A1 | 2005-05-06 | |||
| WO2005040749A1 | 2005-05-06 |
Attorney, Agent or Firm:
Koichi Washida