Runlength coding method and apparatus for use in a video signal

Details Runlength coding method and apparatus for use in a video signal Runlength coding method and apparatus for use in a video signal

1995-12-19

1997-09-16

Williams, Howard L.

Coded data generation or conversion

Digital code to digital code converters

To or from bit count codes

3582611, 348426, H03M 746

Patent

active

056685475

ABSTRACT:
A runlength coding apparatus for encoding an input data stream to provide a runlength coded signal comprises a first memory for temporarily storing the zeros and non-zero values included in the input data stream, a run-level detection block for detecting a plurality of run-level pairs from the input data values, each of the run-level pairs including a runlength and a corresponding level, a repetition index detection block for detecting the number of runlengths having an identical value, a buffer control block for generating a first read signal and M number of second read signals based on the runlength repetition index, a second memory connected to the run-level detection means for sequentially storing the level data and for generating the level data stored therein based on the M number of second read signals, a third memory connected to the run-level detection means for sequentially storing the runlength data and for generating the runlength data stored therein based on the first read signal, and a formatting circuit for combining the runlength repetition index, the runlength data and the M number of level data and generating the runlength coded signal.

REFERENCES:
patent: 4420771 (1983-12-01), Pirsch
patent: 4684923 (1987-08-01), Koga
patent: 4901075 (1990-02-01), Vogel
patent: 5303058 (1994-04-01), Fukuda

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