DIFF Main Group
H04S 5/00 Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
Introduced: January 1980
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
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- H04S 5/02 of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals since 1980 IPC+CPC Available in IPC and CPC