Layer ID signaling using extension mechanism

US10869047B2 · kind B2 · utility

Assignee

• GE Video Compression, LLC · US

Inventors

• Karsten Suehring · Berlin, DE
• Thomas SCHIERL · Berlin, DE
• Detlev Marpe · Berlin, DE
• Robert SKUPIN · Berlin, DE
• Yago SÁNCHEZ DE LA FUENTE · Berlin, DE
• Gerhard Tech · Berlin, DE

Key dates

• Filing date: Feb 27, 2020
• Grant date: Dec 15, 2020
• Expiry date: Feb 27, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N19/91
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A signaling of the layer ID is described which each of the packets of a multi-layered video signal is associated with. In particular, an efficient way of signaling this layer association is achieved, with nevertheless maintaining the backward compatibility with codecs according to which a certain value of the base layer-ID field is restricted to be non-extendable such as base layer-ID value 0 in the base layer-ID field. Instead of circumventing this restriction specifically with respect to this non-extendable base layer-ID value, the layer-ID of portions of the multi-layer data stream is signaled in an extendable manner by sub-dividing the base layer-ID field into a first sub-field and a second sub-field: whenever the first sub-field of the base layer-ID field fulfills a predetermined criterion, an extension layer-ID field is provided, and if the first sub-field of the base layer-ID field does not fulfill the predetermined criterion, the extension layer-ID field is omitted.