5 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.

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.

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 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.