CPC Subgroup
H04N 9/89 Time-base error compensation
Full Title
Details of colour television systems > Processing of colour television signals in connection with recording > Regeneration of colour television signals (H04N9/80 takes precedence) > Time-base error compensation
2 direct subcodes
Child Classifications
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- H04N 9/893 using an analogue memory, e.g. a CCD shift register, the delay of which is controlled by a voltage controlled oscillator
- H04N 9/896 using a digital memory with independent write-in and read-out clock generators
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