68 results about "Network abstraction layer unit" patented technology

A system comprises an encoder configured to compress attribute information and/or spatial information for a point cloud and/or a decoder configured to decompress compressed attribute and/or spatial information for the point cloud. To compress the attribute and/or spatial information, the encoder is configured to convert a point cloud into an image based representation. Also, the decoder is configured to generate a decompressed point cloud based on an image based representation of a point cloud. In some embodiments, a bit stream structure may be used to communicate compressed point cloud data. The bit stream structure may include point cloud compression network abstraction layer (PCCNAL) units that enable use of groups of frames (GOFs), frame, and sub-frame signaling of patch information. Such a bit stream structure may permit low delay streaming and random access reconstruction of point clouds amongst other applications.

In the conventional content, a minimum access unit of the random access information is one frame unit. In the case of SVC video content, one frame consists of a plurality of scalable layers. The SVC data can be used for each salable layer only when the data is accessible for each scalable layer. The present invention provides a method and apparatus for transmitting and receiving an SVC file for each scalable layer wherein the SVC file can be accessed for each scalable layer by allowing metadata to contain a layer descriptor in a network abstraction layer unit (NALU) or in a byte unit.

A system and method provides a first integrity check code that can be calculated at an encoder and then sent to a decoder as a supplemental enhancement information message. The decoder can then calculate a second integrity check code over the actual received network abstraction layer units. This second integrity check code can be compared with the encoder-generated first integrity check code sent via the supplemental enhancement information message to indicate if in fact all of the transmitted NAL units from which the integrity check code was generated have been received without changes in their content. In addition, an error tracking algorithm is provided that can be run at either the encoder or the decoder in order to determine if the network abstraction layer units are correct in content at the decoder level. Therefore, pictures that are sent as just intra coded frames and pictures that are sent as just inter coded frames can both be checked for errors. Hence, error checking can be provided in those situations where the decoder fails to provide adequate information to the encoder as to what has actually been decoded.

A multiplexer applies dynamic bit rate reduction at the multiplexer level in accordance with the types of video input streams as determined from information contained in units of the video input streams. The multiplexer parses the Network Abstraction Layer (NAL) headers of said units to determine their relative importance and passes them on to its output accordingly. The multiplexer can also take advantage of the relation between streams if they are related, as in the case of Scalable Video Coding (SVC).

A method and an apparatus for maintaining information security in a video multicasting service are provided. The method includes: generating a network abstraction layer unit using received video information; encrypting the network abstraction layer unit of the video information; realtime transport protocol (RTP) packetizing the encrypted network abstraction layer unit of the video information; recording unit format information and field information, included in the network abstraction layer of the video information being stored in a memory, in a header extension field of the RTP header; and transmitting the RTP packet including the encrypted video information to a routing device.

The present invention relates to a method for storing image data, and a method for parsing image data, and an apparatus for using the same, which method includes the steps of encoding the image data, and storing an NAL (Network Abstraction Layer) unit containing the encoded image data in the decoder set register in which NAL units may be stored according to the type of NAL unit.

The invention discloses an AVS coding network transmission method for a video recorder and a video server, comprising: determining a RTP protocol to transmit AVS code stream which includes a particular format in a RTP effective load region, three sending means for RTP data packets to send a unit data head of a network abstraction layer are as follows: one RTP only loads one frame of ONP format sending; one RTP packet comprises a plurality of frames of MNP format sending; one frame is divided into a plurality of fragments which are respectively placed into ONFP format sending in the RTP packet and formats for package and analysis. The invention realizes packing format of AVS on RTP transmission and utilizes the RTP protocol to accomplish network transmission of the AVS stream media, such that AVS coding can be applied effectively in the surveillance field, in particular, in network surveillance, and the network surveillance can be realized rapidly and securely in the technical field of prevention and surveillance for security.

The invention discloses a parallel task partitioning method for an HEVC decoder. According to the method, processing of a network abstraction layer unit, decoding of a parameter set and header information and management work of a decoding image buffer area are executed by one control unit, entropy coding, inverse quantization, inverse transformation, intra-frame prediction, inter-frame prediction and deblocking filter required by a decoding and coding tree unit and pixel self-adaptive compensation are executed by a plurality of work units, and a steamline type work mode is adopted in the control unit and the work units. The parallel task partitioning method for the HEVC decoder can ensure load balance better and eliminate dependence on a lock structure in the synchronous process, so that the computing resource utilization rate is improved, and synchronous overhead is saved.

The present invention relates to a method for storing video information, to a method for parsing video information and to an apparatus using the same. The method for storing video information according to the present invention comprises: a step of encoding video information; and a step of storing a network abstraction layer (NAL) unit including the encoded video information in a decoder configuration record. The decoder configuration record may include information indicating the type of NAL unit.

The embodiment of the invention provides a video data processing method and device which are applied in the Internet of Videos. The method comprises the steps that after an original byte code stream of video data is received, network abstraction layer units are recognized from the original byte code stream, and whether or not the type of the network abstraction layer units is a preset type is determined; and when the type of the network abstraction layer units is the preset type, the network abstraction layer units are extracted, then the extracted network abstraction layer units are recombined, and a target byte code stream is obtained and sent to an Internet of Videos playing terminal. According to the video data processing method and device, redundant or abnormal byte code fragments canbe removed from the original byte code stream of the video data, the condition that due to the fact that a hardware decoder such as a set-top box meets the redundant or abnormal byte code fragments during decoding, the problems of blank screens, blocking, picture missing and shaking are generated when a video is played is avoided, and the fault-tolerant capacity of the decoder and the video playing smoothness are improved.

The invention relates to a video extension code setting and video playing method and system wherein the video extension code setting method comprises the following steps: reading the extension information from a preset video file; according to the extension information, setting extension codes; identifying a network abstraction layer unit from the framework of the video file and identifying the extension fields in the network abstraction layer unit; adding the extension codes to the extension fields; updating the network abstraction layer unit and saving the video file. The video extension code setting and video playing method and system of the invention enable a corresponding video to carry more information and increase the carrying amount of the corresponding video. Since the above video can be played via more players, for instance, the special players corresponding to the extension information or other universal players, procedures required by the user to play the video can be reduced.

The invention belongs to the technical field of network monitoring, and discloses a wireless transmission method and device, an audio and video collection terminal and a monitoring system. The methodcomprises the following steps: acquiring environment condition information in a mine, wherein the environment condition information at least comprises an environment image and an environment audio; performing real-time transmission protocol encapsulation on the environmental condition information to obtain an environmental condition data frame; segmenting the environment condition data frame intoenvironment condition data frame groups with a preset number of frames, and copying all the environment condition data frame groups with a preset number to obtain an environment condition data frame group set; and allocating each environment condition data frame group included in the environment condition data frame set to different network abstraction layer units and transmitting the environmentcondition data frame groups to a target server in parallel. According to the wireless transmission method provided by the embodiment of the invention, the environmental condition data to be transmitted are respectively transmitted after being segmented and copied, so that the data loss during mass data transmission can be avoided while the transmission efficiency is ensured, and the data transmission accuracy is ensured.

The present invention provides a code stream conversion method for inserting SEI data, the code stream conversion method comprising: encoding and compressing first image data to obtain second image data, the second image data comprising network abstraction layer unit compressed data;expanding the network abstraction layer unit to compress data; and inserting the SEI data into the network abstraction layer unit to compress the data. According to the code stream conversion method provided by the invention, the SEI data is inserted into the network abstraction layer unit compressed data of the second image data, so that the network abstraction layer unit compressed data into which the SEI data is inserted has time sequence.

A method for generating a media file according to the present disclosure is characterized by including: a step of configuring a sample entry and samples for a subpicture track; a step of generating the subpicture track including the sample entry and the samples; and a step of generating the media file including the subpicture track, wherein a sample entry type of the sample entry is one of a ‘vvs1’, a ‘vvc1’or a ‘vvi1’, and wherein the sample entry and the samples in the subpicture track are configured without non-video coding layer (non-VCL) network abstraction layer (NAL) units.

A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a current picture including a plurality of video coding layer (VCL) network abstraction layer (NAL) units that do not have a same NAL unit type. Active entries of reference picture lists are obtained for slices positioned in a sub-picture A (subpicA) in subsequent pictures following the current picture in decoding order. The active entries do not refer to any reference picture preceding the current picture in decoding order when the subpicA at the current picture is associated with an intra-random access point (IRAP) NAL unit type. The subsequent pictures are decoded based on the reference picture list active entries. The subsequent pictures are forwarded for display as part of a decoded video sequence.