US Patent 9819945 Multi-layer video coding

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.