# US 2021/0243460 A1 · Cluster-based dependency signaling

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- Number: US 2021/0243460 A1
- Document ID: US20210243460A1
- Status: Published application
- Kind: A1
- Application number: 17/239,022
- Filed: 2021-04-23
- Published: 2021-08-05
- Earliest claimed: 2013-07-15
- Assignees: Ge Video Compression, LLC
- Applicants: Ge Video Compression, LLC
- Inventors: Karsten SUEHRING; Thomas SCHIERL; Detlev MARPE; Robert SKUPIN; Yago SANCHEZ DE LA FUENTE; Gerhard TECH
- Web page: https://patentgrep.com/patent/US20210243460A1

## CPC

- H04N 19/30: using hierarchical techniques, e.g. scalability (H04N19/63 takes precedence)
- H04L 69/324: in the data link layer [OSI layer 2], e.g. HDLC
- H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
- H04N 19/166: concerning the amount of transmission errors, e.g. bit error rate [BER]
- H04N 19/174: the region being a slice, e.g. a line of blocks or a group of blocks
- H04N 19/187: the unit being a scalable video layer
- H04N 19/33: in the spatial domain
- H04N 19/423: characterised by memory arrangements (H04N19/433 takes precedence)
- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N 19/50: using predictive coding (H04N19/61 takes precedence)
- H04N 19/593: involving spatial prediction techniques
- H04N 19/65: using error resilience
- H04N 19/66: involving data partitioning, i.e. separation of data into packets or partitions according to importance
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 19/85: using pre-processing or post-processing specially adapted for video compression
- H04N 19/89: involving methods or arrangements for detection of transmission errors at the decoder
- H04N 19/91: Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The signalization of the inter-layer dependencies between layers of a multi-layered data stream is described. A good compromise between a too intensive restriction of the potential diversity of inter-layer dependencies on the one hand and a too complex signaling of the inter-layer dependencies on the other hand has been found by describing the inter-layer dependencies by way of a first inter-dependency syntax structure indicating inter-dependencies between pairs of different values representable by a base layer-ID and a second inter-dependency syntax structure indicating inter-dependencies between pairs of different values representable by an extension layer-ID, the base layer ID and extension layer ID indexing the layers the portions of the multi-layer data stream are associated with. In accordance with this concept, emphasis may be shifted between increased diversity of the signalizable inter-layer dependencies on the one hand and reduced side-information overhead for signaling the inter-layer dependencies on the other hand.

## Claims

### Claim at position 1

1-20. (canceled)

### Claim 21

A device configured to process a data stream representing a multi layered signal into which a video is coded at different layers, the data stream comprising a plurality of packets, each of which is associated with one of the different layers, and each layer is indexed by a base layer-ID or an extension layer-ID, the device being configured to:
read, from the data stream:
a first inter-dependency syntax structure indicating inter-dependencies between pairs of values representable by the base layer-ID, and a second inter-dependency syntax structure indicating inter-dependencies between pairs of values representable by the extension layer-ID, wherein an instantiation of the second inter-dependency syntax structure indicates (a) a first layer dependent on a second layer, wherein the first and second layers are associated with a same base layer-ID, or (b) a first layer dependent on a second layer, wherein the first and second layers are associated with different extension layer-IDs; and
construct, based on the first and second inter-dependency syntax structures, an inter-layer dependency description revealing inter-layer prediction dependencies between the different layers.