Inventor
OHTA YASUJI
JP12 patents
Patents
12 patentsUS5261027ANov 9, 1993
Code excited linear prediction speech coding system
FUJITSU LTD122 citations97
US5115469AMay 19, 1992
Speech encoding/decoding apparatus having selected encoders
FUJITSU LTD79 citations96
US5086471AFeb 4, 1992
Gain-shape vector quantization apparatus
FUJITSU LTD68 citations96
US5323486AJun 21, 1994
Speech coding system having codebook storing differential vectors between each two adjoining code vectors
FUJITSU LTD44 citations92
US5263119ANov 16, 1993
Gain-shape vector quantization method and apparatus
FUJITSU LTD29 citations92
US5224167AJun 29, 1993
Speech coding apparatus using multimode coding
FUJITSU LTD36 citations92
US5199076AMar 30, 1993
Speech coding and decoding system
FUJITSU LTD48 citations92
US5003604AMar 26, 1991
Voice coding apparatus
FUJITSU LTD23 citations89
US5864650AJan 26, 1999
Speech encoding method and apparatus using tree-structure delta code book
FUJITSU LTD18 citations84
US5828811AOct 27, 1998
Speech signal coding system wherein non-periodic component feedback to periodic excitation signal source is adaptively reduced
FUJITSU LTD19 citations84
US5151968ASep 29, 1992
Vector quantization encoder and vector quantization decoder
FUJITSU LTD17 citations71
US5231692AJul 27, 1993
Pitch period searching method and circuit for speech codec
FUJITSU LTD3 citations62