Speech coding apparatus capable of implementing acceptable...

Details Speech coding apparatus capable of implementing acceptable... Speech coding apparatus capable of implementing acceptable...

2006-04-18

2006-04-18

Azad, Abul K. (Department: 2654)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S265000, C704S230000

Reexamination Certificate

active

07031912

ABSTRACT:
A speech coding apparatus includes a frequency parameter generating unit that generates LSP coefficients of an input signal. When the input signal is a non-speech signal, it generates the LSP coefficients of the non-speech signal in such a manner that they approach the LSP coefficients of the speech signal. Thus, even when the input signal is the non-speech signal, its LSP coefficients are quantized by referring to the LSP quantization codebook which is specifically prepared for the speech signal. Although a conventional speech coding apparatus has a problem in that even when it transmits the non-speech signal in a good condition, a conventional speech decoding apparatus cannot always decode the non-speech signal correctly, the present speech coding apparatus can solve the problem even when the receiving side uses the conventional speech decoding apparatus.

REFERENCES:
patent: 4393272 (1983-07-01), Itakura et al.
patent: 5835480 (1998-11-01), Chennakeshu
patent: 5913189 (1999-06-01), Lee et al.
patent: 6230255 (2001-05-01), Asghar et al.
patent: 6424940 (2002-07-01), Agassy et al.
patent: 6708146 (2004-03-01), Sewall et al.
patent: B1577488 (1994-01-01), None
patent: 0 742 548 (1996-11-01), None
patent: B1577488 (1997-04-01), None
patent: WO 98/04046 (1998-01-01), None
patent: WO 99/31895 (1999-06-01), None
Shapira I et al.; A Variable Bit Rate Operation of LD-CELP Mainly for VBD Applications in DCME; 1997 IEEE; pp. 73-74.
Dimolitsas S et al. ; Performance of CCITT's 16kbits/s LD-CELP Algorithm with Non-Voice Signals; COMSAT Laboratories, USA, 1992, IEEE, pp. 1704-1708.
Salami et al.; ITU-T G.729 Annex A: Reduced complexity 8kb/s CS-ACELP Codec for Digital Simultaneous Voice and data, IEEE Communication Magazine; Sep. 1997; pp. 56-63.
Neto et al.; Performance of ITU-T G.729 8kb/s CS-ACELP Speech Codec with Nonvoice Narrowband Signals; IEEE Communication Magazine; Sep. 1997; pp. 82-91.
International Telecommunication Union, Recommendation G.279, 35 pages (1996).
Salami, IEEE Transactions on Speech and Audio Processing, Vo, 6, No. 2, pp. 116-130 (1998).
Y. Tohkura et al., “Spectral Smoothing Technique in Parco Speech Analysis-Synthesis,” IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-26, No. 6, Dec. 1, 1978, pp. 587-596.
Ramakrishnan, S., et al., “Constrained-Storage Vector Quantization Universal Codebook,” Proceedings Data Compression Conference, Mar. 28-30, 1995, pp. 42-51, Snowbird, UT, USA (Abstract) ; IEEE Transactions on Image Processing, vol. 7, No. 6, Jun. 1998.

Affiliated with

Also associated with

Rating

Speech coding apparatus capable of implementing acceptable... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speech coding apparatus capable of implementing acceptable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech coding apparatus capable of implementing acceptable... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3563176