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DIFF Subgroup
H04N 5/928

the sound signal being pulse code modulated and recorded in time division multiplex with the modulated video signal

Introduced: January 1995

Full Title

Full titles differ between systems:

IPC:

Details of television systems > Television signal recording > Television signal processing therefor > Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback > the sound signal being pulse code modulated and recorded in time division multiplex with the modulated video signal

CPC:

Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) > Television signal recording > Television signal processing therefor > Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback > the sound signal being pulse code modulated and recorded in time division multiplex with the modulated video signal

Additional Content IPC

Transformation of the television signal for recording involving pulse code modulation of the colour picture signal components with processing of the sound signal

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class H04,2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 97,396
  2. HUAWEI TECHNOLOGIES COMPANY CN 96,502
  3. SAMSUNG ELECTRONICS COMPANY KR 86,981
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
  5. HUAWEI TECHNOLOGIES COMPANY 55,349
  6. LG ELECTRONICS KR 53,649
  7. CANON 33,341
  8. SONY CORPORATION JP 32,761
  9. ZTE CORPORATION CN 32,274
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327

Top Applicants (CPC)

Class H04,2013–2023, worldwide · Source: EPO PATSTAT

  1. HUAWEI TECHNOLOGIES COMPANY CN 101,476
  2. QUALCOMM US 101,139
  3. SAMSUNG ELECTRONICS COMPANY KR 96,655
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
  5. LG ELECTRONICS KR 55,253
  6. HUAWEI TECHNOLOGIES COMPANY 54,181
  7. SONY CORPORATION JP 35,309
  8. ZTE CORPORATION CN 32,950
  9. INTEL CORPORATION US 27,533
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498