CPC Main Group
H04N 9/00 Details of colour television systems
9 direct subcodes
Child Classifications
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- H04N 9/01 Circuitry for demodulating colour component signals modulated spatially by colour striped filters by phase separation
- H04N 9/03 Circuitry for demodulating colour component signals modulated spatially by colour striped filters by frequency separation
- H04N 9/11 Scanning of colour motion picture films, e.g. for telecine
- H04N 9/12 Picture reproducers (H04N9/11 takes precedence)
- H04N 9/43 Conversion of monochrome picture signals to colour picture signals for colour picture display
- H04N 9/44 Colour synchronisation
- H04N 9/64 Circuits for processing colour signals (H04N9/77 takes precedence; camera processing pipelines for processing colour signals H04N23/84)
- H04N 9/77 Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase (circuits for matrixing H04N9/67)
- H04N 9/79 Processing of colour television signals in connection with recording
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- HUAWEI TECHNOLOGIES COMPANY CN 101,476
- QUALCOMM US 101,139
- SAMSUNG ELECTRONICS COMPANY KR 96,655
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
- LG ELECTRONICS KR 55,253
- HUAWEI TECHNOLOGIES COMPANY 54,181
- SONY CORPORATION JP 35,309
- ZTE CORPORATION CN 32,950
- INTEL CORPORATION US 27,533
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498