DIFF Subgroup
H04H 20/88 Stereophonic broadcast systems
Introduced: January 2008
Full Title
Full titles differ between systems:
IPC:
Arrangements for broadcast or for distribution combined with broadcast > Arrangements characterised by special technical features of the broadcast information, e.g. signal form or information format > Stereophonic broadcast systems
CPC:
Arrangements for broadcast or for distribution combined with broadcast > Arrangements characterised by the broadcast information itself > Stereophonic broadcast systems
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 2008.
Child Classifications
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- H04H 20/89 using three or more audio channels, e.g. triphonic or quadraphonic since 2008 IPC+CPC Available in IPC and CPC