H04N 5/16 Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
Introduced: September 1968
Full Title
Full titles differ between systems:
Details of television systems > Picture signal circuitry for video frequency region > Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) > Picture signal circuitry for video frequency region (cameras or camera modules comprising electronic image sensors, or control thereof H04N23/00) > Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
Additional Content IPC
Circuits for reinsertion of DC and slowly varying components of colour signals
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- H04N 5/18 by means of "clamp" circuit operated by switching circuit +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class H04,2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 97,396
- HUAWEI TECHNOLOGIES COMPANY CN 96,502
- SAMSUNG ELECTRONICS COMPANY KR 86,981
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
- HUAWEI TECHNOLOGIES COMPANY 55,349
- LG ELECTRONICS KR 53,649
- CANON 33,341
- SONY CORPORATION JP 32,761
- ZTE CORPORATION CN 32,274
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327
Top Applicants (CPC)
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