Data Compression


Survey Formats


Compression Methods

Data Formats

Run Length Encoding

General Principle

Control Characters

8 Bit Control Character

1 Bit RLE

7 Bit RLE

RLE for Image Data





1 Bit RLE

Certain data types use the bit as fundamental unit. Examples are monochromatic graphic data or deltamodulated audio data. For such a type of contents coding on bit level represents an appropriate alternative.

Contrary to the procedures described so far the bit-level coding starts with the binary run value 0 or 1. Subsequently a 7 bit run counter follows identifying the number of repetitions in a range from 1 to 128.

1 Bit Coding Scheme:

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Versions using Control Characters Repetitions as Control Characters 7 Bit RLE