Bit rate adaptation system for digital transmission systems

Details Bit rate adaptation system for digital transmission systems Bit rate adaptation system for digital transmission systems

1989-04-21

1990-08-28

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

370 84, 375 8, H04J 322

Patent

active

049531808

ABSTRACT:
A rate adaptation system for adapting the rate of a communication stream between a first communication device (TE) and a second communication device (NT). The first communication device transmits and receives data at a first given rate and the second communication device transmits and receives data at a second rate higher than said first rate (generally 8, 16, 32 or 64 kbits/s). The rate adaptation system includes a transmit part (620) which allows the transmission from the first communication device to the second communication device by means of a bit repetition and framing function. The rate adaptation system also includes a receive part (630) which allows the transmission from the second communication device to the first communication device. The invention further includes a first storage (670) which can be addressed by an address bus (640), a data bus (650) and a control bus (660) either by the transmit part (620), or the receive part (630) or by a processor (680) external to the transmit and receive part. A second storage (690) can be addressed by the processor (680 ).

REFERENCES:
patent: 4691342 (1987-09-01), Waldron
patent: 4823312 (1989-04-01), Michael et al.
Data Communications, vol. 12, No. 6, Jun. 1983, pp. 125-136 "Looking at ISDN Interfaces" Collie et al.
Electronics, vol. 51, No. 4, Feb. 1978, pp. 110-113 "EPROM Achieves Non-Uniform Data-Channel Sampling" Bowles, B. et al.
Patent Abstracts of Japan, vol. 7, No. 84 (E-169) (12297, 8th) Apr. 1983.
Patent Abstracts of Japan JP-A-58945 (Sumitomo Jukikai Kogyo K. K.) Jan. 1, 1983.

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