Data processing: speech signal processing – linguistics – language – Audio signal time compression or expansion
Reexamination Certificate
2006-03-21
2006-03-21
Ometz, David L. (Department: 2655)
Data processing: speech signal processing, linguistics, language
Audio signal time compression or expansion
C704S504000, C704S201000, C704S211000, C379S088070
Reexamination Certificate
active
07016850
ABSTRACT:
Speech at the beginning of a talkspurt in a discontinuous transmission (DTX) packet telephony system is speeded up to help make up for an access delay incurred during channel allocation. Incoming speech frames are buffered, a pitch period for a current portion of the signal is estimated, and then a pitch period=s worth of the signal is cut from that portion. This is continued until the original access delay, as estimated from the time lag between the commencement of voice input for the talkspurt, and notification that a channel is available, is eliminated. The remainder of the talkspurt is then transmitted without such compression.
REFERENCES:
patent: 3104284 (1963-09-01), French et al.
patent: 5216744 (1993-06-01), Alleyne et al.
patent: 5386493 (1995-01-01), Degen et al.
patent: 5555447 (1996-09-01), Kotzin et al.
patent: 5699404 (1997-12-01), Satyamurti et al.
patent: 5706393 (1998-01-01), Ehara
patent: 5796719 (1998-08-01), Peris et al.
patent: 6356545 (2002-03-01), Vargo et al.
Real-time implementation of time domain harmonic scaling of speech for rate modification and coding□□Cox, R.; Crochiere, R.; Johnston, J.; Acoustics, Speech, and Signal Processing, IEEE Transactions on, vol. 31, Iss. 1, Feb. 1983, pp.: 258-272.
High quality time-scale modification for speech□□Roucos, S.; Wilgus, A. □□Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '85., vol. 10, Iss., Apr. 1985, pp.: 493-496.
Cox Richard Vandervoort
Kapilow David A
Albertalli Brian L.
AT&T Corp.
Ometz David L.
LandOfFree
Method and apparatus for reducing access delay in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing access delay in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing access delay in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3558621