A device for processing video data includes a memory configured to store at least a portion of a bitstream of multi-layer video data and one or more processors configured to generate a first video coding layer (VCL) network abstraction layer (NAL) unit for a first picture of an access unit, the first VCL NAL unit comprising a first slice type; generate a second VCL NAL unit for a second picture of the access unit, the second VCL NAL unit comprising a second slice type; and generate an access unit delimiter (AUD) NAL unit based on the first and second slice types.

A device for processing video data includes a memory configured to store at least a portion of a multi-layer bitstream of video data; and one or more processors configured to receive the portion of the multi-layer bitstream, the multi-layer bitstream comprising a plurality of layers, the plurality of layers comprising a non-independently decodable non-base layer (non-INBL) and an independently decodable non-base layer (INBL); receive a video parameter set (VPS) associated with the coded video data, the VPS comprising first representation format parameters; receive a sequence parameter set (SPS) associated with the INBL, the SPS comprising second representation format parameters; process the non-INBL based on the first representation format parameters; and process the INBL based on the second representation format parameters.

Certain embodiments disclosed herein provide systems and methods for processing multimedia data. The systems and methods comprise receiving a first set of quantized coefficients representing at least one video frame, receiving a second set of quantized coefficients representing the at least one video frame, and generating, using the first set of quantized coefficients and second set of quantized coefficients, a third set of quantized coefficients representing the at least one video frame. In certain embodiments, quantization parameters associated with the first and second sets are used in producing the third set of quantized coefficients.

A device for decoding video data includes a memory configured to store at least a portion of a bitstream of multi-layer video data and one or more processors configured to receive a first access unit delimiter (AUD) network abstraction layer (NAL) unit for a first access unit, wherein a layer identifier for the first AUD NAL unit is equal to zero; receive a second AUD NAL unit for the first access unit, wherein a layer identifier for the second AUD NAL unit is greater than zero; and decode the first access unit

A device for encoding video data includes a memory configured to store at least a portion of a multi-layer bitstream of video data and one or more processors configured to determine that a supplemental enhancement information (SEI) message applies to more than one layer of the multi-layer video data; determine that the SEI message references a syntax element that has multiple instances associated with the more than one layer of the multi-layer video data; and set all of the multiple instances to a same value.

A technique for encoding a video signal generates multiple layers and multiple corresponding masks for each of a set of blocks of the video signal. Each of the layers for a given block is a rendition of that block, and each of the masks distinguishes pixels of the respective layer that are relevant in reconstructing the block from pixels that are not. The encoder applies lossy compression to each of the layers and transmits the lossily compressed layers and a set of the masks to a decoder, such that the decoder may reconstruct the respective block from the layers and the mask(s).

Techniques to determine a level id in a layered bitstream are disclosed, such that the same level id can be used for all layers of a scalable bitstream. Also disclosed are techniques to signal level ids for sub bitstreams that can be indicative of lower computational requirements than the level id used for the layered bitstream.

The present invention relates to a method for encoding visual data comprising a plurality of layers using one or more hierarchical algorithms. According to an aspect of the invention, there is provided a method of encoding visual data using a plurality of layers wherein each layer encodes a different representation, and wherein one or more of the plurality of layers comprises one or more hierarchical algorithms, the method comprising the steps of: extracting one or more samples within each of the plurality of layers; and processing within each layer the one or more samples extracted in the layer; wherein in at least one of the plurality of layers the step of processing comprises applying the one or more hierarchical algorithms to the samples extracted in the layer in relation to any inter-layer prediction; and wherein the step of processing reduces a predetermined mathematical distortion between samples of a first layer and samples of a second layer.