Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Television systems > Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band

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 simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band

Of 6 combined children, 4 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 1985.

Child Classifications

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H04N 7/0803 CPC only CPC only
H04N 7/0806 CPC only CPC only
H04N 7/081 the additional information signals being transmitted by means of a subcarrier since 1995 IPC+CPC Available in IPC and CPC
H04N 7/083 with signal insertion during the vertical and the horizontal blanking interval since 1995 IPC+CPC Available in IPC and CPC
H04N 7/084 with signal insertion during the horizontal blanking interval since 1995 IPC+CPC Available in IPC and CPC
H04N 7/087 with signal insertion during the vertical blanking interval since 1985 IPC+CPC Available in IPC and CPC