DIFF Subgroup
H04N 9/80 Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
Introduced: January 1985
Full Title
Details of colour television systems > Processing of colour television signals in connection with recording > Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1985.
Child Classifications
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- H04N 9/802 involving processing of the sound signal (H04N9/806, H04N9/835 take precedence) since 1995 IPC+CPC Available in IPC and CPC
- H04N 9/804 involving pulse code modulation of the colour picture signal components since 1995 +1 CPC IPC+CPC Available in IPC and CPC
- H04N 9/808 involving pulse code modulation of the composite colour video-signal since 1995 +2 CPC IPC+CPC Available in IPC and CPC
- H04N 9/81 the individual colour picture signal components being recorded sequentially only since 1985 IPC+CPC Available in IPC and CPC
- H04N 9/82 the individual colour picture signal components being recorded simultaneously only since 1985 +1 CPC IPC+CPC Available in IPC and CPC
- H04N 9/86 the individual colour picture signal components being recorded sequentially and simultaneously, e.g. corresponding to SECAM-system since 1985 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