Encoder in facsimile apparatus generates code words with one bit

Details Encoder in facsimile apparatus generates code words with one bit Encoder in facsimile apparatus generates code words with one bit

1994-01-13

1996-02-20

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

341 63, 382245, H04N 1415, H04N 1419, H03M 746, H03M 748

Patent

active

054934079

ABSTRACT:
A pixel data encoder for use in a facsimile apparatus features a first in first out memory for storing one-dimensional binary pixel data sequences in synchronism with a data acquisition clock; a run length determiner coupled to receive the one-dimensional binary pixel data sequences stored in the first in first out memory, the run length determiner calculating a run length for each of the one-dimensinal binary pixel data sequences received; and an encoding section which issues a one-bit address signal for indicating raw data will be issued and N-bit raw data in the event that the run length is less than a predetermined run length N, the encoding section issuing an address code and a remainder code in the event that the run length exceeds N, the address code consisting of consecutive binary level "1"s with a bit length (M-2) and a binary level "0", and the remainder code consisting of a binary sequence representing the run length wherein the most significant bit of the binary sequence is omitted, M representing a total number of binary digits of the run length.

REFERENCES:
patent: 4163260 (1979-07-01), Hisao et al.
patent: 4327379 (1982-04-01), Kadakia et al.
patent: 4688100 (1987-08-01), Haganuma et al.
patent: 5067023 (1991-11-01), Kim
Patent Abstracts of Japan, vol. 15, No. 355, (E1109) Sep. 9, 1991 & JP-3-136575 Jun. 11, 1991.

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