H04N 9/64 Circuits for processing colour signals (H04N9/77 takes precedence; camera processing pipelines for processing colour signals H04N23/84)
Full Title
Details of colour television systems > Circuits for processing colour signals (H04N9/77 takes precedence; camera processing pipelines for processing colour signals H04N23/84)
Filing statistics
CPC H04N 9/64 belongs to the parent subclass H04N, which recorded 864,508 patent applications worldwide between 2013 and 2023. Annual filings grew from 63,372 in 2013 to 69,353 in 2023 (+9%), peaking at 99,144 applications in 2020. The most active applicants in class H04 are HUAWEI TECHNOLOGIES COMPANY (101,476 applications), QUALCOMM (101,139 applications) and SAMSUNG ELECTRONICS COMPANY (96,655 applications).
Source: EPO PATSTAT, worldwide filings
15 direct subcodes
Child Classifications
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- H04N 9/65 for synchronous modulators
- H04N 9/66 for synchronous demodulators
- H04N 9/67 for matrixing (camera processing pipelines for matrixing of colour signals H04N23/85)
- H04N 9/68 for controlling the amplitude of colour signals, e.g. automatic chroma control circuits (H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86)
- H04N 9/70 for colour killing
- H04N 9/72 for reinsertion of DC and slowly varying components of colour signals (camera processing pipelines for reinsertion of DC or slowly varying components of colour signals H04N23/87)
- H04N 9/73 Colour balance circuits, e.g. white balance circuits or colour temperature control (camera processing pipelines for colour balance H04N23/88)
- H04N 9/74 for obtaining special effects (H04N9/65 - H04N9/73 take precedence)
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