IPC Subgroup
H04N 9/8 Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
Introduced: January 1985
Last revised: January 2006
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
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- PICTORIAL COMMUNICATION, e.g. TELEVISION
6 direct subcodes
Child Classifications
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- H04N 9/802 involving processing of the sound signal
- H04N 9/804 involving pulse code modulation of the colour picture signal components
- H04N 9/808 involving pulse code modulation of the composite colour video-signal
- H04N 9/81 the individual colour picture signal components being recorded sequentially only
- H04N 9/82 the individual colour picture signal components being recorded simultaneously only
- H04N 9/86 the individual colour picture signal components being recorded sequentially and simultaneously, e.g. corresponding to SECAM-system
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