CPC Subgroup
H04N 7/167 Systems rendering the television signal unintelligible and subsequently intelligible
Full Title
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) > Analogue secrecy systems; Analogue subscription systems > Systems rendering the television signal unintelligible and subsequently intelligible
3 direct subcodes
Child Classifications
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- H04N 7/169 Systems operating in the time domain of the television signal
- H04N 7/171 Systems operating in the amplitude domain of the television signal