Title:
METHOD AND DEVICE FOR CODING VOICE
Document Type and Number:
Japanese Patent JP3453116
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To code a voice pitch which is a voice coding parameter of analytico- synthetic type, vocal/silent information and amplitude of harmonics spectrum with a small number of bits.
SOLUTION: The voice pitch is quantized by switching a frame of logarithmic pitch, which is quantized by uniform/differential selection, to a frame, which is quantized by an interpolating pitch candidate index between the frames, by an input switching part 103. The vocal/silent information is quantized by switching a frame, which is quantized by an index of the vocal/silent information selected from representative vocal/silent information 132, to a frame, which does not transmit the vocal/silent information, by a frame thinning part 133. The amplitude of harmonics spectrum is quantized by switching a frame, which is modeled by an autoregressive linear predictive model adjusted in spectrum, to a frame which is quantized by the index of interpolating candidate of modeling coefficient, by an input switching part 141. As a result, the voice coding parameter can be satisfactorily quantized with low bit rate.
Inventors:
Teruo Fumoto
Seiji Sasaki
Seiji Sasaki
Application Number:
JP2000292666A
Publication Date:
October 06, 2003
Filing Date:
September 26, 2000
Export Citation:
Assignee:
Panasonic Mobile Communications Co., Ltd.
International Classes:
G10L19/02; G10L13/00; G10L19/04; G10L19/087; G10L19/16; G10L25/93; H03M7/30; H04B14/04; (IPC1-7): G10L19/02; G10L11/06; G10L13/00; G10L19/04
Domestic Patent References:
| JP6130999A | ||||
| JP9172413A | ||||
| JP61150000A | ||||
| JP6238500A |
Other References:
Ｔｈｏｍａｓ Ｅｒｉｋｓｓｏｎ，Ｈｏｎｇ−Ｇｏｏ Ｋａｎｇ，Ｐｉｔｃｈ Ｑｕａｎｔｉｚａｓｔｉｏｎ ｉｎ Ｌｏｗ Ｂｉｔ−Ｒａｔｅ Ｓｐｅｅｃｈ Ｃｏｄｉｎｇ，ＩＣＡＳＳＰ’９９，１９９９年，ｐ．４８９−４９２
佐々木誠司，他，混合励振線形予測符号化を用いた業務用移動通信向け低ビットレート音声コーデック，電子情報通信学会論文誌Ｄ−ＩＩ，２００１年 ４月，Ｖｏｌ．Ｊ８４−Ｄ−ＩＩ，Ｎｏ．４，ｐ．６２９−６４０
麓照夫，他，マルチバンド励振ハーモニック線形予測符号化を用いた業務用移動通信向け低ビットレート音声コーデック，電子情報通信学会論文誌Ｄ−ＩＩ，２００３年 １月，Ｖｏｌ．Ｊ８６−Ｄ−ＩＩ，Ｎｏ．１，ｐ．３２−４１
佐々木誠司，他，混合励振線形予測符号化を用いた業務用移動通信向け低ビットレート音声コーデック，電子情報通信学会論文誌Ｄ−ＩＩ，２００１年 ４月，Ｖｏｌ．Ｊ８４−Ｄ−ＩＩ，Ｎｏ．４，ｐ．６２９−６４０
麓照夫，他，マルチバンド励振ハーモニック線形予測符号化を用いた業務用移動通信向け低ビットレート音声コーデック，電子情報通信学会論文誌Ｄ−ＩＩ，２００３年 １月，Ｖｏｌ．Ｊ８６−Ｄ−ＩＩ，Ｎｏ．１，ｐ．３２−４１
Attorney, Agent or Firm:
Koichi Washida
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