DIFF Subgroup
H04N 7/03 Subscription systems therefor
Introduced: January 1995
Full Title
Full titles differ between systems:
IPC:
Television systems > Systems for transmission of digital non-picture data, e.g. of text during the active part of a television frame > Subscription systems therefor
CPC:
Television systems (details H04N3/00, H04N5/00; methods or arrangements, for coding, decoding, compressing or decompressing digital video signals H04N19/00; selective content distribution H04N21/00) > Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame > Subscription systems therefor
No child classifications to compare. This is a leaf node in both IPC and CPC.