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    LAYER ID SIGNALING USING EXTENSION MECHANISM
    6.
    发明公开
    LAYER ID SIGNALING USING EXTENSION MECHANISM 审中-公开

    公开(公告)号：EP4373092A1

    公开(公告)日：2024-05-22

    申请号：EP23208252.9

    申请日：2014-07-15

    申请人： GE Video Compression, LLC

    发明人： SÜHRING, Karsten ,  SCHIERL, Thomas ,  MARPE, Detlev ,  SKUPIN, Robert ,  SÁNCHEZ DE LA FUENTE, Yago ,  TECH, Gerhard

    IPC分类号： H04N19/65 ,  H04N19/70 ,  H04N19/30

    CPC分类号： H04N19/65 ,  H04N19/70 ,  H04N19/30

    摘要： 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. The aforementioned non-extendable base layer-ID value is "hidden" within the group of base layer-ID values for which the first sub-field of the base layer-ID field does not fulfill the predetermined criterion, and accordingly this non-extendable base layer-ID value is not handled separately, but rendered part of the former group. Rather, if the first sub-field of the base layer-ID field fulfills the predetermined criterion, an extension value is derived from the extension layer-ID field signaled within the multi-layer data stream such that same lies within a first subset of a domain of extension values, and if the first sub-field of the base layer-ID field does not fulfill the predetermined criterion, this extension value is set to a value disjoint to the first subset of the domain of extension values. The layer which a respective portion is associated with is then indexed using the extension value as well as the cluster value which is derived from a second sub-field of the base layer-ID field. All in all, no signaling efficiency has been lost despite the maintenance of the backward compatibility.

    CLUSTER-BASED DEPENDENCY SIGNALING
    8.
    发明公开
    CLUSTER-BASED DEPENDENCY SIGNALING 审中-实审

    公开(公告)号：EP4362466A2

    公开(公告)日：2024-05-01

    申请号：EP23215854.3

    申请日：2014-07-15

    申请人： GE Video Compression, LLC

    发明人： SÜHRING, Karsten ,  SCHIERL, Thomas ,  MARPE, Detlev ,  SKUPIN, Robert ,  SÁNCHEZ DE LA FUENTE, Yago ,  TECH, Gerhard

    IPC分类号： H04N19/65

    CPC分类号： H04N19/65 ,  H04N19/70 ,  H04N19/30

    摘要： 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: for example, calling the sets of layers having a common base-layer ID, respectively, "clusters", the same second inter-dependency syntax structure may be used to regulate the inter-dependencies within all clusters and between all clusters related to each other via the first inter-dependency syntax structure, separately. Alternatively, two instantiations of the second inter-dependency syntax structure may be used to describe the inter-dependencies of the layers within the clusters on the one hand and between the layers of different clusters, on the other hand. Irrespective of the emphasis placed towards increased diversity or reduced side information overhead, the inter-dependency signaling concept results in keeping the signaling overhead low.