Signaling and selection for layers in scalable video
A method is provided for signaling individual layer parameters in a transport stream that includes: indicating, using a supplemental enhancement information (SEI) message in the video stream, operation point information; inserting the operation point information in the transport stream using an operation point descriptor; and providing the operation point descriptor in a Program Map Table (PMT).
1. A method for decoding a transport stream carrying high efficiency video coding (HEVC) video streams that include one or more temporal layers and one or more spatial layers, each layer encoded in a respective elementary stream, the transport stream signaling individual layer parameters for layers in the HEVC video streams, the method comprising:
identifying in the transport stream an HEVC video descriptor including one or more syntax elements that apply to a whole HEVC layered stream;
determining from the HEVC video descriptor one or more elements that indicate whether a plurality of temporal layers are present in one or more spatial layers in the HEVC layered stream;
identifying in the transport stream an operation point descriptor including one or more syntax elements that:
signal individual layer parameters for each temporal layer present in the HEVC layered video stream, and
identify an operation point including one or more temporal layers and one or more spatial layers present in the HEVC layered stream;
wherein the individual layer parameters signaled in the operation point descriptor are associated to a relevant elementary stream using a Program Map Table (PMT); and
buffering for a decoding process each temporal and/or spatial layer in the HEVC layered stream using parameters signaled in the operation point descriptor, wherein each temporal and/or spatial layer in the HEVC layered stream is individually buffered.
2. The method of claim 1 , wherein one of the individual layer parameters signaled in the operation point descriptor is at least one of an average bit rate or a maximum bit rate.
3. The method of claim 1 , wherein an SEI message signals to a video decoder that individual layer parameters are available for the one or more individual layers.
4. The method of claim 1 , wherein the HEVC layered stream comprises an enhancement layer and an additional enhancement layer that has been added to an operation point list.
5. The method of claim 4 , further comprising receiving in the transport stream at least one of the bitrate, rendering capability, and decoding capability of the additional enhancement layer.
6. The method of claim 5 , further comprising selecting and rendering the additional enhancement layer in the PMT.
7. The method of claim 1 , wherein the transport stream indicates a scalable enhancement for the transport stream.
8. The method of claim 7 , wherein the scalable enhancement comprises a spatial, temporal, and/or signal-to-noise ratio (SNR) enhancement.
9. The method of claim 7 , wherein scalable enhancement comprises a view-depth and/or view-texture enhancement.
10. The method of claim 1 , wherein the transport stream comprises HEVC, scalable HEVC (SHVC), multiview HEVC (MV HEVC), or combinations thereof.
11. The method of claim 1 , wherein the one or more spatial layers in the HEVC layered stream includes at least one of: a single base layer or a base layer and one or more enhancement layers dependent on another layer.
12. The method of claim 1 , wherein the HEVC layered stream includes multiple temporal layers in a single spatial layer or multiple spatial layers.
13. The method of claim 11 , wherein the operation point descriptor includes operation points for each of the HEVC video streams carried by the transport stream, each operation point identifying a combination of one or more temporal layers and one or more spatial layers for decoding a respective one of the HEVC video streams.