Signaling for addition or removal of layers in video coding
View Patent ↗In one embodiment, a method determines an encoded plurality of layers for a scalable video stream for a video where each of the plurality of layers includes a respective layer parameter setting. An additional layer for the plurality of layers is determined where the additional layer enhances a base layer in the plurality of layers and the respective layer parameter settings for the encoded plurality of layers do not take into account the additional layer. The method then determines an additional layer parameter setting for the additional layer. The additional layer parameter setting specifies a relationship between the additional layer and at least a portion of the plurality of layers where the additional layer parameter setting is used to decode the additional layer and the at least a portion of the plurality of layers.
1. A method for transmitting a transport stream including one or more descriptors carrying syntax elements for an encoded plurality of high efficiency video coding (HEVC) layers in the transport stream, the method comprising:
receiving data for the encoded plurality of HEVC layers that includes spatial layers and temporal layers;
constructing the transport stream to include the encoded plurality of HEVC layers and the one or more descriptors for transmission, the transmission of the transport stream including:
signaling in a first syntax element of the one or more descriptors, a respective layer parameter setting for each of the encoded plurality of HEVC layers;
signaling in the one or more descriptors a second syntax element identifying an additional layer decodable in the transport stream but unaccounted for in the encoded plurality of HEVC layers; and
signaling in the one or more descriptors at least one additional layer parameter 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, wherein the at least one additional layer parameter setting is for decoding the additional layer and the at least a portion of the encoded plurality of HEVC layers.
2. The method of claim 1 , further comprising: encoding the additional layer, wherein the plurality of HEVC layers other than the additional layer are not re-encoded and the respective layer parameter settings for the plurality of HEVC layers and the additional layer are not changed.
3. The method of claim 1 , further comprising: sending the additional layer and the at least a portion of the plurality of HEVC layers with each respective layer parameter setting and the at least one additional layer parameter setting to a decoder.
4. The method of claim 3 , wherein sending comprises: adding the at least one additional layer parameter setting into a transport layer for the additional layer and the at least a portion of the plurality of HEVC layers.
5. The method of claim 4 , wherein the at least one additional layer parameter setting is included in at least one of the one or more descriptors in the transport layer.
6. The method of claim 3 , wherein sending comprises: sending the respective layer parameter settings in a video layer for the at least a portion of the plurality of HEVC layers.
7. The method of claim 1 , further comprising: setting a parameter indicating that additional layers may be added to the at least a portion of the plurality of HEVC layers in a video layer.
8. The method of claim 7 , wherein the parameter in the video layer indicates that the at least one additional layer parameter setting will be included in a transport layer.
9. The method of claim 7 , wherein the parameter is included in a video parameter set (VPS) or a sequence parameter set (SPS) in one of the encoded at least a portion of the plurality of HEVC layers.
10. The method of claim 1 , wherein the at least one additional layer parameter setting specifies layer specific information for the additional layer.
11. The method of claim 1 , wherein the at least one additional layer parameter setting specifies layer dependent information for the additional layer and the at least a portion of the plurality of HEVC layers.
12. The method of claim 1 , wherein the respective layer parameter settings for the additional layer and the at least a portion of the plurality of HEVC layers manage individual buffer settings at a decoder for each of the additional layer and the at least a portion of the plurality of HEVC layers.
13. The method of claim 1 , further comprising:
removing a layer from the plurality of HEVC layers;
determining a removed layer parameter setting based on the removing of the layer, the removed layer parameter setting specifying a relationship between remaining layers in the plurality of HEVC layers based on the removing of the layer; and
sending the at least a portion of the plurality of HEVC layers with respective layer parameter settings, wherein the removed layer parameter setting is not used to decode the at least a portion of the plurality of HEVC layers.
14. An apparatus for sending a transport stream including one or more descriptors carrying syntax elements for decoding high efficiency video coding (HEVC) layers signaled in the transport stream, the apparatus comprising:
one or more computer processors; and
a non-transitory computer-readable storage medium comprising instructions that, when executed, control the one or more computer processors to construct the transport stream, the instructions comprising instructions for:
signaling in one or more descriptors a first syntax element identifying a respective layer parameter setting for each of the plurality of HEVC layers;
signaling in the one or more descriptors a second syntax element identifying an additional layer to the plurality of HEVC layers, wherein the additional layer enhances one or more of the plurality of HEVC layers including a base layer;
signaling in the one or more descriptors at least one additional layer parameter 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 plurality of HEVC layers, wherein the at least one additional layer parameter setting is for decoding the additional layer and the at least a portion of the plurality of HEVC layers; and
sending the at least a portion of the plurality of HEVC layers and the at least one additional layer parameter setting to a decoder along with the respective layer parameter settings for the plurality of HEVC layers for decoding the at least a portion of the plurality of layers and the additional layer based on the signaled dependency.
15. The apparatus of claim 14 , further comprising: encoding the additional layer, wherein the plurality of HEVC layers other than the additional layer are not re-encoded and the respective layer parameter settings for the plurality of layers and the additional layer are not changed.
16. The apparatus of claim 14 , wherein sending comprises: adding the at least one additional layer parameter setting into a transport layer for the additional layer and the at least a portion of the plurality of HEVC layers.