Method of coding digital information organized in frames using a

Details Method of coding digital information organized in frames using a Method of coding digital information organized in frames using a

1986-11-19

1988-08-02

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

370102, 371 53, H03M 514

Patent

active

047616350

ABSTRACT:
A method is provided for coding in the CMI code digital information organized in frames, wherein each frame locking word V, chosen equal to 1, is placed in the last position in the frame. The CMI code is violated at the position of said word V and, for keeping the statistics of the coding law, it is arranged for this violation to be alternately 00 and 11, from one frame to another. For this, immediately before the word V is inserted a binary filling word B, chosen by taking into account the number of binary "1"s before filling. If the number of binary "1"s before filling is even, the binary element B is coded like the violation of the frame locking word V and, in the opposite case, B is coded 01.

REFERENCES:
patent: 4520480 (1985-05-01), Kawai
Yoshikai, Asamura and Katoh, "F-400M Line Terminal Equipment", Review of the Electrical Communication Laboratories, vol. 31, No. 3, (May 1983), pp. 253-258.
Kobayashi, Aida and Tokura, "Non-Repeated Submarine Optical Transmission Terminal Equipment", Review of the Electrical Communication Laboratories, vol. 31, No. 6, (Nov. 1983), pp. 844-852.
Horiguchi, Miki and Ishio, "F-32M and F-100M Fiber Optic Transmission Systems", Japan Telecommunications Review, vol. 23, No. 2, (Apr. 1981), pp. 125-134.
Kitami and Yoneda, "Line Codes and Repeater Fault Location Schemes for Optical Transmission Systems", Electronics and Communications in Japan, vol. 65, No. 4, (Apr. 1982), pp. 56-66.
Kihara et al., "Optical Data-Transmission Equipment for Computer Systems (Optical Data Mux)", National Telecommunications Conference, Nov. 29-Dec. 3, 1981, pp. G1.1.1-G1.1.5.

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