Abstract: A video device for processing multi-layer video data includes a data storage medium configured to store the multi-layer video data and one or more processors configured to obtain the multi-layer video data; store the multi-layer video data in a file format; store representation format information for each operation point of the multi-layer video data in an operation points information (oinf) box for the file format; and generate a file of video data formatted according to the file format.

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a first video layer having a first picture in a first access unit. The processor is configured to determine whether the first picture in the first access unit is an intra random access point (IRAP) picture, and in response to determining that the first picture in the first access unit is an IRAP picture, provide an indication, in a bitstream, to reset a picture order count (POC) of at least one other picture in the first access unit, wherein the at least one other picture is not an IRAP picture. The processor may encode or decode the video information.

Abstract: In one example, a device for processing video data includes a memory for storing an enhancement layer of video data coded according to an extension of a video coding standard, and one or more processors configured to decode a hierarchy extension descriptor for an elementary stream including the enhancement layer, wherein the hierarchy extension descriptor includes data representative of two or more reference layers on which the enhancement layer depends, wherein the two or more reference layers include a first enhancement layer, conforming to a first scalability dimension, and a second enhancement layer, conforming to a second scalability dimension, and wherein the first scalability dimension is different than the second scalability dimension, and to process the video data based at least in part on the data representative of the two or more reference layers.

Abstract: A method of decoding 360-degree video, including receiving video data indicative of a 360-degree video picture projected onto a 2D picture, the 2D picture being divided into a plurality of blocks, predicting a first of the blocks of the 2D picture, and deblock filtering pixels along a border of the first of the blocks based on the position of the border between the first of the blocks and a second of the blocks in the 360-degree video picture.

Abstract: In an example, a method of coding video data includes coding one or more non-video coding layer (VCL) network abstraction layer (NAL) units of a layer of a multi-layer bitstream, where the one or more non-VCL NAL units contain a decoded picture hash SEI message. The method also includes determining a set of layers of the multi-layer bitstream to which the decoded picture hash SEI message is applicable based on a layer identifier of the one or more non-VCL NAL units containing the decoded picture hash SEI message.

Abstract: A video processing device obtains a data stream comprising a plurality of elementary streams and a High Efficiency Video Coding (HEVC) timing and Hypothetical Reference Decoder (HRD) descriptor. The HEVC timing and HRD descriptor comprises a target schedule index syntax element indicating an index of a delivery schedule. The video processing device may identify, based on a set of parameters, a syntax element in an array of syntax elements in a video parameter set (VPS). The set of parameters may comprise a parameter having a value equal to a value of the target schedule index syntax element. The video processing device may identify, based on an index specified by the identified syntax element, a particular HRD parameters syntax structure in a plurality of HRD parameters syntax structures as being applicable to a particular elementary stream.

Abstract: An apparatus for coding video information according to certain aspects includes a memory unit configured to store video information associated with a plurality of layers and a processor. The processor is configured to obtain information associated with a current access unit (AU) to be coded, the current AU containing pictures from one or more layers of the plurality of layers. The processor is further configured to determine whether the current AU includes a first layer containing an intra random access point (IRAP) picture. The process is additionally configured to reset a picture order count (POC) of the second layer at the current AU, in response to determining that the current AU includes (1) a first layer that contains an IRAP picture and (2) a second layer containing no picture or containing a discardable picture.

Abstract: Systems, methods, and computer readable media are described for providing improved video coding, including improved video stream switching and random access. In some examples, systems, methods, and computer readable media include obtaining video data at an encoder and determining, from the video data, an intra random access point (IRAP) picture. A first set of one or more leading pictures associated with the IRAP picture are coded as random access decodable leading (RADL) pictures based on the first set of one or more leading pictures having a temporal identifier (TemporalId) that is less than or equal to a TemporalId threshold value. A second set of one or more leading pictures associated with the IRAP picture are coded as random access skipped leading (RASL) pictures based on the second set of one or more leading pictures having a TemporalId that is greater than the TemporalId threshold value.

Abstract: A video device for processing multi-layer video data includes a data storage medium configured to store the multi-layer video data and one or more processors configured to obtain the multi-layer video data; store the multi-layer video data in a file format; store representation format information for each operation point of the multi-layer video data in an operation points information (oinf) box for the file format; and generate a file of video data formatted according to the file format.

Abstract: Devices and methods for improving use of supplemental enhancement information (SEI) messages in multi-layer codecs for decoding multi-layer bitstreams containing video information are disclosed. In one aspect, a device may include a memory that stores video information associated with the multi-layer bitstream. The stored video information may include an SEI message and a processor connected to the memory. The processor determines whether the SEI message belongs to a first SEI message category or a second SEI message category based on an identifier in the SEI message. The processor further determines whether the SEI message applies to the operation points or the layers and, in response to the SEI message being of the first SEI message category and applying to the operation points, associates each semantic of the SEI message with each operation point among the operation points.

Abstract: Techniques and systems are provided for processing 360-degree video data. For example, a picture of the 360-degree video data can be obtained. The picture can include samples projected from a three-dimensional format to a two-dimensional format. A weight value can be determined for at least one sample of the picture. The weight value can be determined based at least on a position of the at least one sample in the picture. At least one adaptive parameter can be determined for the at least one sample using the determined weight value. The at least one adaptive parameter can include one or more of an adaptive weighted distortion, an adaptive weighted quantization parameter value, or an adaptive weighted lambda value. A cost associated with coding the at least one sample using one or more coding modes can be determined using the at least one adaptive parameter of the at least one sample.

Abstract: A video processing device obtains a data stream comprising a plurality of elementary streams and a High Efficiency Video Coding (HEVC) timing and Hypothetical Reference Decoder (HRD) descriptor. The HEVC timing and HRD descriptor comprises a target schedule index syntax element indicating an index of a delivery schedule. The video processing device may identify, based on a set of parameters, a syntax element in an array of syntax elements in a video parameter set (VPS). The set of parameters may comprise a parameter having a value equal to a value of the target schedule index syntax element. The video processing device may identify, based on an index specified by the identified syntax element, a particular HRD parameters syntax structure in a plurality of HRD parameters syntax structures as being applicable to a particular elementary stream.

Abstract: An apparatus obtains an operation point reference track in the file and one or more additional tracks in the file. No operation point information sample group is signaled in any of the additional tracks. For each respective sample of each respective additional track of the one or more additional tracks, the apparatus determines whether to consider the respective sample part of the operation point information sample group. Based on the operation point reference track not containing a sample that is temporally collocated with the respective sample in the respective additional track, the respective sample in the respective additional track is considered part of an operation point information sample group of the last sample in the operation point reference track before the respective sample of the respective additional track.

Abstract: Techniques and systems are provided for decoding video data. For example, a method of decoding video data includes receiving, by a decoding device, an encoded video bitstream generated according to a first coding protocol, and determining that a base layer is to be provided to the decoding device as part of an external bitstream that is different from the received encoded video bitstream. The external bitstream is provided to the decoding device by an external source and is not provided as part of the encoded video bitstream. The base layer is encoded using a second coding protocol that is different from the first coding protocol. The method further includes determining to ignore a profile, tier, and level syntax structure assigned to the base layer in the video parameter set in response to determining the base layer is to be provided to the decoding device as part of an external bitstream.

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes generating an encoded video bitstream comprising multiple layers. The encoded video bitstream includes a video parameter set defining parameters of the encoded video bitstream. The video parameter set includes video usability information. The method further includes determining whether timing information is signaled in the video usability information of the video parameter set. The method further includes determining whether to signal hypothetical reference decoder parameters in the video usability information of the video parameter set based on whether timing information is signaled in the video usability information.

Abstract: A video processing device may obtain, from a descriptor for a program comprising one or more elementary streams, a plurality of profile, tier, level (PTL) syntax element sets. Each respective PTL syntax element set of the plurality of PTL syntax element sets comprises syntax elements may specify respective PTL information. The video processing device obtains, from the descriptor for the program, a plurality of operation point syntax element sets. Each respective operation point syntax element set of the plurality of operation point syntax element sets may specify a respective operation point of a plurality of operation points. The video processing device may determine, for each respective layer of respective operation point specified by respective operation point syntax element sets, based on a respective syntax element in the respective operation point syntax element set, which of the PTL syntax element sets specifies the PTL information assigned to the respective layer.

Abstract: An apparatus for coding video information according to certain aspects includes a memory and a processor configured to: determine a value of a first flag indicative of whether preceding pictures that precede a current picture in a current layer in decoding order are used for temporal motion vector prediction (TMVP) of subsequent pictures that follow the current picture in the current layer in decoding order, the first flag associated with the current picture; and refrain from using the preceding pictures in the current layer as reference pictures for TMVP of the current picture, in response to determining that the value of the first flag indicates that the preceding pictures in the current layer should not be used for TMVP of the subsequent pictures in the current layer.

Abstract: An apparatus configured to code video information includes a memory unit and a processor in communication with the memory unit. The memory unit is configured to store video information associated with a first video layer having a first picture. The processor is configured to process picture order count (POC) derivation information associated with the first picture, and determine, based on the POC derivation information associated with the first picture, a POC value of at least one other picture in the first video layer that precedes the first picture in decoding order. The processor may encode or decode the video information.

Abstract: Techniques and systems are provided for processing video data. For example, 360-degree video data can be obtained for processing by an encoding device or a decoding device. The 360-degree video data includes pictures divided into motion-constrained tiles. The 360-degree video data can be used to generate a media file including a plurality of tracks. Each of the plurality of tracks contain a set of at least one of the motion-constrained tiles. The set of at least one of the motion-constrained tiles corresponds to at least one of a plurality of viewports of the 360-degree video data. A first tile representation can be generated for the media file. The first tile representation encapsulates a first track of the plurality of tracks, and the first track includes a first set of at least one of the motion-constrained tiles at a first tile location in the pictures of the 360-degree video data. The first set of at least one of the motion-constrained tiles corresponds to a viewport of the 360-degree video data.

Abstract: In an example, a method of decoding video data includes decoding data that indicates a picture order count (POC) reset for a POC value of a first picture of a first received layer of multi-layer video data, where the first picture is included in an access unit. The method also includes, based on the data that indicates the POC reset for the POC value of the first picture and prior to decoding the first picture, outputting all pictures stored in a decoded picture buffer (DPB) that precede the first picture in coding order and that are not included in the access unit.