Transmission error correction code appending device which can re

Details Transmission error correction code appending device which can re Transmission error correction code appending device which can re

1994-09-26

1996-10-08

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 84, 371 375, H04J 322

Patent

active

055638872

ABSTRACT:
In a transmission error correction code appending device which receives a variable bit rate signal transmitted at a variable bit rate and having a plurality of information bytes, a transmitting circuit transmits, unless a timer circuit produces a time-out signal, the information bytes to a correction code appending circuit and transmits, when the timer circuit produces the time-out signal, zero bytes to the correction code appending circuit subsequently to the information bytes so that the information bytes and the zero bytes constitute first through N-th data bytes of first through M-th data groups, where each of M and N represents a predetermined plural and natural number. The correction code appending circuit consecutively supplies an interleaver with first through M-th blocks, each having the first through the N-th data bytes and first through P-th error correction code bytes as first through Q-th block bytes, where P represents a prescribed natural number, Q being equal to (N+P). An informing signal producer produces an informing signal when the interleaver receives the first block byte of the first block. The timer circuit produces the time-out signal when the timer circuit times a preselected time interval from a time instant at which the timer circuit receives the informing signal.

REFERENCES:
patent: 5241563 (1993-08-01), Paik et al.
International Telecommunication Union, Integrated Services Digital Network (ISDN), Overall Network Aspects and Functions, "B-ISDN ATM Adaption Layer (AAL) Specification," ITU-T Recommendation 1.363, Mar., 1993.

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