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

Introduced: January 1985

Of 6 combined children, 5 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

Child Classifications

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H03M 7/001 +7 CPC CPC only CPC only
H03M 7/02 Conversion to or from weighted codes, i.e. the weight given to a digit depending on the position of the digit within the block or code word since 1985 IPC+CPC Available in IPC and CPC
H03M 7/14 Conversion to or from non-weighted codes since 1985 IPC+CPC Available in IPC and CPC
H03M 7/26 Conversion to or from stochastic codes since 1985 IPC+CPC Available in IPC and CPC
H03M 7/28 Programmable structures, i.e. where the code converter contains apparatus which is operator-changeable to modify the conversion process since 1985 IPC+CPC Available in IPC and CPC
H03M 7/30 Compression (speech analysis-synthesis for redundancy reduction G10L19/00; for image communication H04N); Expansion; Suppression of unnecessary data, e.g. redundancy reduction since 1985 +12 CPC −2 IPC IPC+CPC Available in IPC and CPC