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IPC Subgroup
H04N 19/65

using error resilience

Introduced: January 2014

Full Title

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals > using error resilience

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
PICTORIAL COMMUNICATION, e.g. TELEVISION

Filing statistics

IPC H04N 19/65 belongs to the parent subclass H04N, which recorded 1,015,361 patent applications worldwide between 2013 and 2023. Annual filings grew from 76,403 in 2013 to 85,701 in 2023 (+12%), peaking at 118,798 applications in 2020. The most active applicants in class H04 are QUALCOMM (97,396 applications), HUAWEI TECHNOLOGIES COMPANY (96,502 applications) and SAMSUNG ELECTRONICS COMPANY (86,981 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Resynchronisation marker resynchronisation markers A special Variable Length Coding binary word inserted to allow re-initialisation of VLC decoding, which is forced by the marker. Reversible Variable Length Coding reversible variable length code reversible variable length codes RVLC VLC allowing backward decoding of the stream, i.e. decoding of a VLC coded binary string starting from the end to the beginning.

4 direct subcodes

Child Classifications

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  • H04N 19/66 involving data partitioning, i.e. separation of data into packets or partitions according to importance
  • H04N 19/67 involving unequal error protection [UEP], i.e. providing protection according to the importance of the data
  • H04N 19/68 involving the insertion of resynchronisation markers into the bitstream
  • H04N 19/69 involving reversible variable length codes [RVLC]

Top Applicants

Top 10 applicants by patent filingsfor 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