This Recommended Standard defines a source-coding data-compression algorithm and specifies how data compressed using the algorithm are inserted into source packets for retrieval and decoding. Issue 2: - increases the allowed values of block length J from {8, 16} to {8, 16, 32, 64}; - increases the maximum allowed value of the reference sample interval r from 256 to 4096; - allows the use of a restricted set of code options - defines a new subfield of the Source Configuration Field of the optional Compression Identification packet; - adds guidance for selection of code option when two or more code options gave the same performance for a block; - updates nomenclature subsection; - clarifies some text; - adds a dedication to Warner Miller.

This document issue was superseded by CCSDS 121.0-B-3, Lossless Data Compression (Blue Book, Issue 3), released August 2020.