9 results about "Network Abstraction Layer" patented technology

Systems, methods, and apparatus, including computer programs encoded on a computer-readable medium, for encoding, decoding, or transcoding digital video are described. One example method of video processing includes performing a conversion between a video and a bitstream of the video, wherein the bitstream conforms to a sequence of sub-bitstream extraction processes defined by a rule, the rule specifying that (a) the sequence of sub-bitstream extraction processes excludes an operation that removes all supplemental enhancement information (SEI) network abstraction layer (NAL) units that satisfy a condition from an output bitstream, or (b) the sequence of sub-bitstream extraction processes includes an operation that replaces a parameter set with a replacement parameter set prior to removing the SEI NAL units from the output bitstream.

The application discloses a network infrastructure based on next-generation mobile communication and relates to the technical field of wireless communication, comprising a heterogeneous network, which is constructed uniformly according to the paradigm of whole-process closed-loop management and control of demand, perception, decision and execution for various heterogeneous networks in the space-air-ground-sea integrated network, and is controlled and data-transmitted through mutually understood languages, wherein each heterogeneous network is a network element of the heterogeneous network, the network architecture is a cluster of heterogeneous networks, and the three-element network slice of intelligent originality, safe endogeny and perception symbiosis runs through each network abstraction layer of the network architecture. The application can interconnect and intercommunicate information between the space-air-ground-sea integrated network.

This invention provides a video decoding method performed by a video decoding device. [Solution] The video decoding method includes the steps of: obtaining NAL unit type information indicating the current type of NAL (network abstraction layer) unit from a bitstream; and decoding the video slice based on whether a mixed NAL unit type is applied to the current picture, if the NAL unit type information indicates that the current NAL unit type is encoded data for a video slice.

Image encoding / decoding methods and apparatus are provided. The image decoding method performed by the image decoding apparatus according to this disclosure includes the following steps: obtaining a first flag indicating the presence of Network Abstraction Layer (NAL) HRD parameters in the bitstream and a second flag indicating the presence of Video Coding Layer (VCL) HRD parameters in the bitstream; obtaining a third flag indicating whether the time interval between the output times of consecutive frames in the bitstream has a fixed value; deriving the output time of the frames in the bitstream based on at least one of the first, second, and third flags; and processing the frames in the bitstream based on the derived output times, wherein the first flag has a second value indicating that the NAL HRD parameters are not present in the bitstream and the second flag has a second value indicating that the VCL HRD parameters are not present in the bitstream, and the third flag can be restricted to having a first value indicating that the time interval between the output times of consecutive frames in the bitstream has a fixed value.

Devices, systems and methods for specifying the syntax and semantics of the decoding parameter set (DPS) are described. One example method of video processing includes performing a conversion between a video and a bitstream of the video, wherein the bitstream conforms to a format rule specifying a data structure is in a first access unit (AU) of the bitstream, wherein the first AU is located at a start of the bitstream, wherein the data structure is a type of network abstraction layer (NAL) unit.

A method of decoding is provided. The method includes receiving a video bitstream including a picture unit (PU), where any decoding capability information (DCI) network abstraction layer (NAL) unit, video parameter set (VPS) NAL unit, sequence parameter set (SPS) NAL unit, or picture parameter set (PPS) NAL unit referred to by the PU precedes a picture header (PH) NAL unit of the PU and a first video coding layer (VCL) NAL unit of the PU; and decoding a coded picture from the PU to obtain a decoded picture.

A mechanism for processing video data is disclosed. The mechanism includes determining to process a track including a set of neural network post-processing filter characteristics (NNPFC) samples, where the processing includes inserting supplemental enhancement information (SEI) network abstraction layer (NAL) units, and where a prefix SEI NAL unit or a suffix SEI NAL unit is inserted into the NNPFC samples for each layer included in the track. Conversion between the visual media data and the bitstream is performed based on the NNPFC sample set.

A mechanism for processing video data is disclosed. The mechanism includes determining to process a track containing neural-network post-filter characteristics (NNPFC) sample groups, wherein the processing includes insertion of supplemental enhancement information (SEI) network abstraction layer (NAL) units, and wherein a prefix SEI NAL unit or a suffix SEI NAL unit is inserted in a NNPFC sample for each layer contained in the track. A conversion is performed between a visual media data and a bitstream based on the NNPFC sample groups.

An encoder includes: memory; and circuitry coupled to the memory and configured to generate an encoded bitstream. In the encoder, when a multi-layer structure is to be included in the encoded bitstream to be generated, the circuitry generates the encoded bitstream by including in the encoded bitstream (i) a sequence parameter set that refers to a video parameter set and (ii) a network abstraction layer (NAL) unit having a layer identification (ID) greater than zero in the multi-layer structure, and when the multi-layer structure is not to be included in the encoded bitstream to be generated, the circuitry generates the encoded bitstream by including in the encoded bitstream a sequence parameter set that does not refer to the video parameter set.