Multiplex communications – Wide area network – Packet switching
Patent
1993-10-12
1995-07-25
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 60, 370 80, 370 81, 370 941, 370111, 395 21, H04D 316
Patent
active
054368995
ABSTRACT:
The high performance multiplexed transmission system of this invention is configured by a sound coding unit for coding voice input information by separating it into a core information part for assuring the minimum acceptable sound quality and a supplementary information part discardable in stages per the transmission priorities. There is a silent section detecting unit for detecting silent sections of voice input information. In addition, there is a multiplexing unit for multiplexing only the information synchronizing with the correspondent's coder for the voice channels from which no sound is detected, or first the core information part and second the supplementary information part from the ones with the highest priorities in stages in fixed length frames, for discarding the supplementary information parts, which cannot be multiplexed because of a band deficiency.
REFERENCES:
patent: 4320505 (1982-03-01), Baun, Jr. et al.
patent: 4408324 (1983-11-01), Black et al.
patent: 4589130 (1986-05-01), Galand
patent: 4703480 (1987-11-01), Westall et al.
patent: 4754455 (1988-06-01), Yasunaga
patent: 4914650 (1990-04-01), Sriram
patent: 4993022 (1991-02-01), Kondo et al.
patent: 5121385 (1992-06-01), Tominaga et al.
Goodman, "Embedded DPCM for Variable Bit Rate Transmission," IEEE Transactions on Communications, vol. COM-28, No. 7, Jul. 1980, pp. 1040-1046.
Kou et al., "Digital Speech Interpolation for Variable Rate Coders with Aplication to Subband Coding," IEEE Transactions on Communications, vol. COM-33, No. 10, Oct. 1985, pp. 1100-1108.
Derby et al., "Multirate Subband Coding Applied to Digital Speech Interpolation," IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-35, No. 12, Dec. 1987, pp. 1684-1698.
Cox et al., "Application and Implementation of an Embedded Subband Coder," IEEE International Conference on Communications, Phila. Pa., Jun. 12-15, 1988, Conference Record, vol. 1 of 3, pp. 0090-0095.
Nakada et al., "Variable Rate Speech Coding for Asynchronous Transfer Mode," IEEE Transactions on Communications, vol. 38, No. 3, Mar. 1990, pp. 277-284.
Sherif et al., "Overview of CCITT Embedded ADPCM Algorithms," IEEE International Conference on Communications, Atlanta, Ga., Apr. 15-19, 1990, Conference Record, vol. 3 of 4, pp. 1014-1018.
C. Stacey, "Build Your Own ISDN Terminal/Terminal Adapter," Wescon/87 Conference Record, vol. 31, Los Angeles, Calif. pp. 20-5-1-20-5-7.
M. Yoshikawa, "A Highly Efficient Video Codec And Its Application", Japan Telecommunications Review, vol. 30, No. 4, Oct. 1988, Tokyo, Japan, pp. 25-29.
Fumio Kishino et al., "Variable Bit-Rate Coding of Video Signals for ATM Networks", IEEE Journal on Selected Areas in Communication, vol. 7, No. 5, Jun. 1989, New York, N.Y., pp. 801-806.
K. Sriram, "Dynamic Bandwidth Allocation and Congestion Control Schemes For Voice And Data Multiplexing In Wideband Packet Technology", ICC 90, vol. 3, Apr. 15, 1990, Atlanta, Ga., pp. 1003-1009.
Patents Abstracts of Japan, vol. 14, No. 252, (E-0934) May 30, 1990 & JP-A-20 72 760 (Fuji Electric et al.) Abstract.
Abiru Ken-ichi
Aramaki Takahiro
Fujino Naoji
Matsuda Takao
Nishiyama Naomi
Blum Russell W.
Fujitsu Limited
Olms Douglas W.
LandOfFree
High performance digitally multiplexed transmission system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High performance digitally multiplexed transmission system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High performance digitally multiplexed transmission system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-745397