Bit error resilient variable length code

Details Bit error resilient variable length code Bit error resilient variable length code

1996-06-25

1998-04-28

Baker, Stephen M.

Excavating

341 67, 341 94, 371 378, H03M 742, H03M 1300

Patent

active

057455040

ABSTRACT:
Data is transmitted and received over a channel in a telecommunications system includes encoding the data by providing a plurality of fixed length code tables, wherein each of the fixed length code tables has a size that is different from a size of every other fixed length code table, and encoding the data as a plurality of information code words, wherein each information code word is a selected value from one of the fixed length code tables. A plurality of marker codes is also provided, wherein the marker codes are variable length codes. A unique one of the marker codes is then associated with each of the fixed length code tables, and channel code words are generated by inserting the associated marker code one bit at a time into each of the information code words at a fixed bit interval. The encoded data may be decoded by processing in a forward direction to extract and decode marker code words. Information code bits associated with valid decoded marker code words are extracted and decoded. When an invalid marker code word is extracted, backwards processing is commenced to extract and decode marker code words until an invalid marker code is detected in the backwards direction. An error interval is defined by the positions of the invalid marker code words detected in the forward and backwards directions. Only those valid information code words associated with marker code words that lie outside of the error interval are output for further processing.

REFERENCES:
patent: 3701111 (1972-10-01), Cocke et al.
patent: 3717851 (1973-02-01), Cocke et al.
patent: 5079548 (1992-01-01), Fujiyama et al.
patent: 5408234 (1995-04-01), Chu
patent: 5550542 (1996-08-01), Inoue
patent: 5663721 (1997-09-01), Rossi
Richard Ivy, "Advanced Video Coding--Dallas Closing Report", ITU Rapporteur for Very Low Bitrate Visual Telephony, Document LBC-96-153, Dallas, Texas, Apr. 1996.
ITU-T Draft H.263 "Video Coding for Low Bitrate Communication", p. 19, VLC Table for MVD.
Proceedings of the Singapore Conference on Information Engineering, 6-11 Sep. 1993, New York, US, pp. 1062-1066, XPOO2019211 Ghim Hwee Ong and Shell Ying Huang: "Compression of Chinese text files using a multiple four-bit coding scheme".
IEEE Transactions on Communications, vol. 43, No. 2/4, Feb. 1995, New York, US, pp. 158-162, XPOO506544; Takishima et al.; "Reversible variable length codes".
IEEE Transactions on Information Theory, vol. 31, No. 6, Nov. 1985, New York, US, pp. 794-801, XP002019212; Maxted & Robinson: "Error recovery for variable length codes".

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