Synchronising (for television systems using pulse code modulation H04N7/56)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Synchronising

CPC: Synchronising (for television systems using pulse code modulation H04N7/56)

Full Title

Full titles differ between systems:

IPC:

Details of television systems > Synchronising

CPC:

Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) > Synchronising (for television systems using pulse code modulation H04N7/56)

Additional Content IPC

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

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

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 since 1974 IPC+CPC Available in IPC and CPC
H04N 5/06 Generation of synchronising signals IPC+CPC Available in IPC and CPC
H04N 5/08 Separation of synchronising signals from picture signals IPC+CPC Available in IPC and CPC
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 +2 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