Signaling for addition or removal of layers in scalable video
In one embodiment, a method of signaling individual layers in a transport stream includes: determining a plurality of layers in a transport stream, wherein each layer includes a respective transport stream parameter setting; determining an additional layer for the plurality of layers in the transport stream, wherein the additional layer enhances one or more of the plurality of layers including a base layer and the respective layer parameter settings for the plurality of layers do not take into account the additional layer; and determining an additional transport stream parameter setting for the additional layer, the additional transport stream parameter setting specifying a relationship between the additional layer and at least a portion of the plurality of layers, wherein the additional transport stream parameter setting is used to decode the additional layer and the at least a portion of the plurality of layers.
1. A method of decoding high efficiency video coding (HEVC) layers in a transport stream, the method comprising:
receiving and decoding said transport stream, said transport stream including packetized elementary streams (PES) for an encoded plurality of HEVC layers, said decoding including decoding one or more descriptors in the transport stream for:
determining a respective transport stream parameter setting for each of said packetized encoded plurality of HEVC layers;
identifying syntax elements carried in the one or more descriptors, said syntax elements including a transport stream parameter setting for each of the plurality of HEVC layers;
determining an additional transport stream parameter setting for an additional layer in the packetized encoded plurality of HEVC layers that is decodable from the transport stream in addition to the packetized encoded plurality of HEVC layers, the additional transport stream parameter setting specifying a relationship between the additional layer and at least a portion of the encoded plurality of HEVC layers, wherein the additional transport stream parameter setting is for decoding the additional layer and the at least a portion of the plurality of layers;
identifying an operation point that identifies the additional layer; and
identifying from an extension descriptor to the one or more descriptors at least one additional transport stream setting for the additional layer, the at least one additional layer parameter setting including a hierarchy parameter indexing a dependency between the additional layer and at least a portion of the encoded plurality of HEVC layers;
decoding the packetized encoded plurality of HEVC layers including the additional layer having a dependency on at least a portion of the encoded plurality of HEVC layers.
2. The method of claim 1 , further comprising: receiving the additional layer and the at least a portion of the plurality of layers with each respective transport stream parameter setting and the additional transport stream parameter setting at a decoder.
3. The method of claim 1 , wherein the additional transport stream parameter setting is included in a video descriptor in the transport stream.
4. The method of claim 1 , wherein the respective transport stream parameter settings for each of the plurality of layers in the transport stream are included in a video descriptor in the transport stream.
5. The method of claim 1 , the decoding further comprising: identifying a parameter indicating that additional layers were added to the at least a portion of the plurality of layers in the transport stream.
6. The method of claim 5 , wherein the parameter in the transport stream indicates that the additional transport stream parameter setting is included in the transport stream.
7. The method of claim 1 , wherein the additional transport stream parameter setting specifies layer specific information for the additional layer.
8. The method of claim 1 , wherein the additional transport stream parameter setting specifies layer dependent information for the additional layer and the at least a portion of the plurality of layers other than the additional layer.
9. The method of claim 1 , wherein the additional transport stream parameter setting includes a maximum bit rate for the additional layer and the at least a portion of the plurality of layers other than the additional layer.
10. The method of claim 1 , wherein the additional transport stream parameter setting includes a maximum buffer size for the additional layer and the at least a portion of the plurality of layers other than the additional layer.
11. The method of claim 1 , wherein the transport stream comprises HEVC, scalable HEVC (SHVC), multiview HEVC (MV HEVC), or combinations thereof.
12. An apparatus comprising:
one or more computer processors; and
a computer readable storage medium comprising instructions that, when executed, cause the one or more processors to:
receive and decode said transport stream, said transport stream including packetized elementary streams (PES) for an encoded plurality of HEVC layers, said decoding including decoding one or more descriptors in the transport stream for:
determine a respective transport stream parameter setting for each of said packetized encoded plurality of HEVC layers;
identify syntax elements carried in the one or more descriptors, said syntax elements including a transport stream parameter setting for each of the plurality of HEVC layers;
determine an additional transport stream parameter setting for an additional layer in the packetized encoded plurality of HEVC layers that is decodable from the transport stream in addition to the packetized encoded plurality of HEVC layers, the additional transport stream parameter setting specifying a relationship between the additional layer and at least a portion of the encoded plurality of HEVC layers, wherein the additional transport stream parameter setting is for decoding the additional layer and the at least a portion of the plurality of layers;
identify an operation point that identifies the additional layer; and
identify from an extension descriptor to the one or more descriptors at least one additional transport stream setting for the additional layer, the at least one additional layer parameter setting including a hierarchy parameter indexing a dependency between the additional layer and at least a portion of the encoded plurality of HEVC layers;
decode the packetized encoded plurality of HEVC layers including the additional layer having a dependency on at least a portion of the encoded plurality of HEVC layers.
13. The apparatus of claim 12 , wherein the plurality of layers in the transport stream is encoded.
14. The apparatus of claim 12 , wherein the instructions further cause the one or more processors to: decode the additional layer, wherein the plurality of layers other than the additional layer are encoded separately from the additional layer, and the respective transport stream parameter settings for the plurality of layers other than the additional layer is changed by the additional layer.
15. The apparatus of claim 12 , wherein the additional transport stream parameter setting includes a maximum bit rate for the additional layer and the at least a portion of the plurality of layers other than the additional layer.
16. The apparatus of claim 12 , wherein the additional transport stream parameter setting includes a maximum buffer size for the additional layer and the at least a portion of the plurality of layers other than the additional layer.