H04N 19/3 using hierarchical techniques, e.g. scalability
Introduced: January 2014
Full Title
Methods or arrangements for coding, decoding, compressing or decompressing digital video signals > using hierarchical techniques, e.g. scalability
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- PICTORIAL COMMUNICATION, e.g. TELEVISION
Additional Content
Glossary
Temporal scalability Scalability in terms of frame rate, meaning that a given bit stream includes different sub-streams each with a different frame rate or sub-streams that, when combined, increase the output frame rate. Spatial scalability Scalability in terms of spatial video sampling rate or resolution (e.g. quantisation step size, pixel bit depth), meaning that a given bit stream includes different sub-streams each with a different frame size or resolution or sub-streams that, when combined, increase the output frame size or resolution.
Limiting references
Transform coding using sub-band based transform, e.g. wavelets
6 direct subcodes
Child Classifications
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- H04N 19/31 in the temporal domain
- H04N 19/33 in the spatial domain
- H04N 19/34 Scalability techniques involving progressive bit-plane based encoding of the enhancement layer, e.g. fine granular scalability [FGS]
- H04N 19/36 Scalability techniques involving formatting the layers as a function of picture distortion after decoding, e.g. signal-to-noise [SNR] scalability
- H04N 19/37 with arrangements for assigning different transmission priorities to video input data or to video coded data
- H04N 19/39 involving multiple description coding [MDC], i.e. with separate layers being structured as independently decodable descriptions of input picture data
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