IPC Subgroup
H04N 5/04 Synchronising
Introduced: September 1968
Last revised: January 2006
Full Title
Details of television systems > Synchronising
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- PICTORIAL COMMUNICATION, e.g. TELEVISION
Additional Content
Limiting references
Synchronising systems used in the transmission of pulse code modulated video signals with other pulse code modulated signal
Application references
Colour synchronisation Synchronisation processes at server side for selective content distribution
Related Keywords
SYNCHRONISATION in television systems
4 direct subcodes
Child Classifications
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- H04N 5/05 Synchronising circuits with arrangements for extending range of synchronisation, e.g. by using switching between several time constants
- H04N 5/06 Generation of synchronising signals
- H04N 5/08 Separation of synchronising signals from picture signals
- H04N 5/12 Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
Top Applicants
Top 10 applicants by patent filingsfor 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