Processing of colour television signals in connection with recording

Introduced: January 1985

Full Title

Details of colour television systems > Processing of colour television signals in connection with recording

Of 7 combined children, 4 exist in both systems.

3 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

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H04N 9/7904 CPC only CPC only
H04N 9/7908 +2 CPC CPC only CPC only
H04N 9/7921 +1 CPC CPC only CPC only
H04N 9/793 for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits since 1995 +1 CPC IPC+CPC Available in IPC and CPC
H04N 9/797 for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal (H04N9/804, H04N9/81, H04N9/82 take precedence) since 1995 +2 CPC IPC+CPC Available in IPC and CPC
H04N 9/80 Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback since 1985 IPC+CPC Available in IPC and CPC
H04N 9/87 Regeneration of colour television signals (H04N9/80 takes precedence) since 1985 +3 CPC IPC+CPC Available in IPC and CPC

Class H04,2013–2023, worldwide · Source: EPO PATSTAT

Class H04,2013–2023, worldwide · Source: EPO PATSTAT