Inter-layer parameter set for HEVC extensions
View Patent ↗A video coding device may provide video data processing. The video coding device may receive a plurality of video representation format subsets. The plurality of video representation format subsets may correspond to a plurality of layers. Each of the plurality of video representation subsets may include one or more video representation parameter values. The video coding device may receive a video representation format subset index (e.g., in a cross-layer parameter set) associated with a current layer. The video coding device may determine, using the video representation format subset index, one of the plurality of video representation format subsets associated with the current layer.
1. A video data processing method comprising:
determining a number of active reference layers;
comparing the number of active reference layers to a number of direct reference layers;
determining, whether to include an indication of the active reference layers in a slice-level header based on the comparing of the number of active reference layers with the number of direct reference layers; and
generating a bitstream comprising one or more layers, wherein on a condition that the number of active reference layers is not equal to the number of direct reference layers, including in the bitstream the indication of a picture that is used for inter-layer prediction, and
on a condition that the number of active reference layers is equal to the number of direct reference layers, not including in the bitstream the indication of a picture that is used for inter-layer prediction.
2. The method of claim 1 , wherein the indication is a layer ID of a picture.
3. A video encoding device comprising:
a processor configured to:
determine a number of active reference layers;
compare the number of active reference layers to a number of direct reference layers;
determine, whether to include an indication of the active reference layers in a slice-level header based on the comparing of the number of active reference layers with the number of direct reference layers; and
generate a bitstream comprising one or more layers, wherein on a condition that the number of active reference layers is not equal to the number of direct reference layers, include in the bitstream the indication of a picture that is used for inter-layer prediction, and
on a condition that the number of active reference layers is equal to the number of direct reference layers, not include in the bitstream the indication of a picture that is used for inter-layer prediction.
4. The video coding device of claim 3 , wherein the indication is a layer ID of a picture.
5. A video decoding method comprising:
receiving a bitstream comprising one or more layers, wherein
on a condition that a number of active reference layers in the received bitstream is not equal to a number of direct reference layers, receiving in the bitstream an inter-layer prediction layer syntax element, wherein the inter-layer prediction layer syntax element indicates a list of reference picture layer IDs that can be used by a current picture of a current layer for inter-layer prediction, and
on a condition that a number of active reference layers in the received bitstream is equal to a number of direct reference layers, inferring an inter-layer prediction layer syntax element.
6. The method of claim 5 further comprising:
on a condition that the number of active reference layers is equal to the number of direct reference layers, inferring the inter-layer prediction layer syntax element from a layer ID of a direct reference layer of the current layer.
7. A video decoding device comprising:
a processor configured to:
receive a bitstream comprising one or more layers, wherein on a condition that a number of active reference layers in the received bitstream is not equal to a number of direct reference layers, receive in the bitstream an inter-layer prediction layer syntax element, wherein the inter-layer prediction layer syntax element indicates a list of reference picture layer IDs that can be used by a current picture of a current layer for inter-layer prediction, and
on a condition that a number of active reference layers in the received bitstream is equal to a number of direct reference layers, infer an inter-layer prediction layer syntax element.
8. The video decoding device of claim 7 , on a condition that the number of active reference layers is equal to the number of direct reference layers the processor is further configured to infer the inter-layer prediction layer syntax element from a layer ID of a direct reference layer of the current layer.