Sachiko KURIHARA


Adaptive Spectral Masking of AVQ Coding and Sparseness Detection for ITU-T G.711.1 Annex D and G.722 Annex B Standards
Masahiro FUKUI Shigeaki SASAKI Yusuke HIWASAKI Kimitaka TSUTSUMI Sachiko KURIHARA Hitoshi OHMURO Yoichi HANEDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/05/01
Vol. E97-D  No. 5  pp. 1264-1272
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
speech and audio codingstandardizationITU-T G.711.1 Annex DITU-T G.722 Annex Bsuper-wideband (SWB) extensionalgebraic vector quantization (AVQ)
 Summary | Full Text:PDF

A G.711 Embedded Wideband Speech Coding for VoIP Conferences
Yusuke HIWASAKI Hitoshi OHMURO Takeshi MORI Sachiko KURIHARA Akitoshi KATAOKA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2006/09/01
Vol. E89-D  No. 9  pp. 2542-2552
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
wideband speechVoIPG.711scalable codingMCUpartial mixingtranscoding
 Summary | Full Text:PDF

A 6.4-kbit/s Variable-Bit-Rate Extension to the G.729 (CS-ACELP) Speech Coder
Akitoshi KATAOKA Sachiko KURIHARA Shinji HAYASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1997/12/25
Vol. E80-D  No. 12  pp. 1183-1189
Type of Manuscript:  PAPER
Category: Speech Processing and Acoustics
Keyword: 
CELP codingG.729CS-ACELPvariable bit-rateDSVD
 Summary | Full Text:PDF

Improved CELP-Based Coding in a Noisy Environment Using a Trained Sparse Conjugate Codebook
Akitoshi KATAOKA Sachiko KURIHARA Shinji HAYASHI Takehiro MORIYA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1996/02/25
Vol. E79-D  No. 2  pp. 123-129
Type of Manuscript:  PAPER
Category: Speech Processing and Acoustics
Keyword: 
CELP codingconjugae fixed codebooktrained sparse codebookspeech quality in a noisy environment
 Summary | Full Text:PDF