Techniques are disclosed for multiplexing a dynamic bit-rate video stream with an audio stream received by a client device in a manner that allows the resulting multiplexed stream to be played back without disruption, despite dynamic changes in the bit rate of the video stream that may occur. A content server may stream both a video stream and an audio stream to a client device for playback. The client device may multiplex the video and audio streams prior to them being presented to a playback engine for decoding and playback to a user.

Techniques are disclosed for multiplexing a dynamic bit-rate video stream with an audio stream received by a client device in a manner that allows the resulting multiplexed stream to be played back without disruption, despite dynamic changes in the bit rate of the video stream that may occur. A content server may stream both a video stream and an audio stream to a client device for playback. The client device may multiplex the video and audio streams prior to them being presented to a playback engine for decoding and playback to a user.

A method of and a device for decoding a coded picture coded according to a video codec technology or standard that uses a syntax structure including a Picture Header and at least one Picture Parameter Set (PPS) are provided. The method includes decoding, by a decoder, the Picture Header, the Picture Header including transient information pertaining to a plurality of Coding Units of the coded picture, and the transient information of the Picture Header including at least one reference to the at least one PPS, and further including at least one first syntax element pertaining to an aspect of the video codec technology or standard for decoding. The method further includes activating, by the decoder, a PPS of the at least one PPS that is decoded, the PPS including a second syntax element pertaining to the aspect of the video codec technology or standard for decoding.

A method of and a device for decoding a coded picture coded according to a video codec technology or standard that uses a syntax structure including a Picture Header and at least one Picture Parameter Set (PPS) are provided. The method includes decoding, by a decoder, the Picture Header, the Picture Header including transient information pertaining to a plurality of Coding Units of the coded picture, and the transient information of the Picture Header including at least one reference to the at least one PPS, and further including at least one first syntax element pertaining to an aspect of the video codec technology or standard for decoding. The method further includes activating, by the decoder, a PPS of the at least one PPS that is decoded, the PPS including a second syntax element pertaining to the aspect of the video codec technology or standard for decoding.

A data generation system for generating data representing content to be displayed includes: a content dividing unit operable to divide content to be displayed into a plurality of polyhedra and generate polyhedron position information, an intersection detecting unit operable to generate intersection information that describes the intersection of one or more surfaces within the content with the plurality of polyhedra, a polyhedron classifying unit operable to classify each of the polyhedra in dependence upon the intersection information, the classification indicating the properties of the surface within the respective polyhedra, and a data generating unit operable to generate data comprising the polyhedron position information and the polyhedron classification information.

A data generation system for generating data representing content to be displayed includes: a content dividing unit operable to divide content to be displayed into a plurality of polyhedra and generate polyhedron position information, an intersection detecting unit operable to generate intersection information that describes the intersection of one or more surfaces within the content with the plurality of polyhedra, a polyhedron classifying unit operable to classify each of the polyhedra in dependence upon the intersection information, the classification indicating the properties of the surface within the respective polyhedra, and a data generating unit operable to generate data comprising the polyhedron position information and the polyhedron classification information.

A device may be configured to signal sequence parameter information according to one or more of the techniques described herein. The sequence parameter set information may include in its second byte a syntax element specifying a chroma sampling relative to a luma sampling and a syntax element specifies a luma coding tree block size of each coding tree unit.

A method, computer program, and computer system is provided for splitting viewport bitstreams. A first coded video bitstream is at least partially encoded using a first Group-of-Pictures (GOP) structure at a first resolution. A second coded video bitstream structured into a plurality of tiles is encoded using a second GOP structure at a second resolution, whereby the second GOP structure includes fewer coded pictures than the first GOP structure. A streaming bitstream for decoding or rendering is created using the first coded video bitstream and the second coded bitstream.

A method, computer program, and computer system is provided for splitting viewport bitstreams. A first coded video bitstream is at least partially encoded using a first Group-of-Pictures (GOP) structure at a first resolution. A second coded video bitstream structured into a plurality of tiles is encoded using a second GOP structure at a second resolution, whereby the second GOP structure includes fewer coded pictures than the first GOP structure. A streaming bitstream for decoding or rendering is created using the first coded video bitstream and the second coded bitstream.

A device may be configured to signal sequence parameter information according to one or more of the techniques described herein. The sequence parameter set information may include in its second byte a syntax element specifying a chroma sampling relative to a luma sampling and a syntax element specifies a luma coding tree block size of each coding tree unit.