Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind

Introduced: January 1985

Full Title

Full titles differ between systems:

IPC:

Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits > Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction > Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind

CPC:

Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits > Compression (speech analysis-synthesis for redundancy reduction G10L19/00; for image communication H04N); Expansion; Suppression of unnecessary data, e.g. redundancy reduction > Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

Child Classifications

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H03M 7/48 alternating with other codes during the code conversion process, e.g. run-length coding being performed only as long as sufficientlylong runs of digits of the same kind are present since 1985 IPC+CPC Available in IPC and CPC