67 results about "Network Abstraction Layer" patented technology

In a video decoder having a picture skip function, the video decoder may obtain reference information from a network abstraction layer (NAL) unit, and upon receipt of a skip command, skips frames/pictures from where a non-reference frame/picture begins. The video decoder may execute a picture skip function, either at a fast speed or at a normal speed, according to the skip mode.

System flexibility and ease-of-design is greatly enhanced by using a multicore abstraction layer (MCAL) to interface between a multicore hardware platform, a device operating system and the packet transfer functions of the system. Systems and techniques are described for processing a data packet received at a network interface of a network infrastructure device (such as a wireless switch) or other computing system, particularly using multi-core processors. A classification handler initially classifies the data packet. A plurality of protocol handlers each associated with a data protocol processes the data packet if the classification of the data packet matches the data protocol associated with the protocol handler, and one of several application handlers each associated with a user applications processes the data packet if the classification of the data packet matches the user application associated with the application handler. The MCAL is configured to send the data packet to the classification handler after the packet is initially received, and to subsequently direct the packet toward one of the protocol or application handlers in response to the classification of the data packet. MCAL further contains a set of the containers for handlers. Real application, protocol and classification handlers register with MCAL and are modules developed outside of the MCAL.

An architecture and method that enables communication between applications and peripheral devices through use of network-type messaging. The architecture is exemplified by a machine having a mainboard that includes memory and one or more processors. The mainboard also includes one or more expansion slots for receiving various peripheral device cards. The processor(s) is enabled to communicate with peripheral devices via an internet network that includes network interfaces for both the processor and each of the peripheral devices. The network interfaces include a network port and a network address that is bound to the network port by means of a network socket. Socket application program interface (API) and network abstraction layers are provided by software means to enable applications to communicate with the peripheral devices using network messaging and protocols, such as TCP/IP over an Ethernet.

A system for reducing storage requirements for content-adaptive binary arithmetic coding (CABAC) is provided. The system includes a transcode engine performing CABAC on a video data stream. The transcode engine receives save data, stops CABAC, and converts the video data stream into sub-network abstraction layer (NAL) unit state data. An entropy state data storage system receiving the sub-NAL unit state data and stores the sub-NAL unit state data. The transcode engine subsequently receives restore data, extracts the sub-NAL unit state data from the entropy state data storage system, and re-starts CABAC on the video stream data.

A method and apparatus for transmitting a multimedia data packet are provided. The method includes receiving Bottom-up Network Abstraction Layer (B-NAL) information from a network entity, generating Top-down Network Abstraction Layer (T-NAL) information on the multimedia data to be transmitted, generating a multimedia data packet containing said T-NAL information, and transmitting the multimedia data packet generated in the previous process, to the network entity, in consideration of said B-NAL information.

Provided is a streaming service system and method for a universal video access based on scalable video coding (SVC). A gateway to provide a streaming service may include: an SVC content file parser to receive an SVC content file from a streaming server, and to separately extract an SVC network abstraction layer (NAL unit) of a base layer and an SVC NAL unit of a scalable enhancement layer from SVC NAL units that are included in the SVC content file; an SVC NAL selection unit to select an SVC NAL unit corresponding to a client type of each of terminals; and a packet generation unit to transmit the selected SVC NAL unit to a corresponding terminal.

A method of operation of a video coding system includes: receiving a video bitstream as a serial bitstream; extracting a video syntax from the video bitstream; extracting a low delay flag, a network abstraction layer (NAL) hypothetical reference decode (HRD) parameters present flag, and a video coding layer (VCL) HRD parameters present flag from the video syntax extracting a HRD syntax from the video bitstream based on the low delay flag, the NAL HRD parameters present flag, and the VCL HRD parameters present flag; extracting a temporal layer from the video bitstream based on the video syntax having the HRD syntax; and forming a video stream based on the temporal layer for displaying on a device.

Systems and methods are provided which allow receivers to recover the decoding order of network abstraction layer (NAL) units conveyed in different Real Time Protocol (RTP) sessions. An indication of decoding order for application data units (ADUs) in each packet is included in the packet structure of a PACSI NAL unit, when the PACSI NAL unit is a single-time aggregation packet type A (STAP-A) packet and the PACSI NAL unit is the first NAL unit in an aggregation packet (e.g., when a receiver is subscribed to different RTP session that convey NAL units). If the receiver is subscribed to only a base layer RTP session, the CL-DON indication can be ignored.

A source-channel combined coding method including: determining whether a channel signal-to-noise ratio (SNR) is varied or not; when it is determined that the channel SNR is varied, selecting a MODCOD suitable for the channel SNR by referring to a first table defining an SNR threshold value at which data transmission is performed without an error, for each MODCOD designating a low density parity check (LDPC) code rate and a modulation scheme; calculating a source coding rate by using an effective information bit rate of the selected MODCOD; extracting network abstraction layer (NAL) units for each layer from an inputted video frame so as to satisfy the calculated source coding rate, and packetizing the extracted NAL units; binding packets to configure a baseband (BB) frame; and LDPC coding and modulating the BB frame through the code rate and the modulation scheme which are designated by the selected MODCOD.

Advanced multiplexing methods and apparatus that are especially useful in multiplexing variable bit rate input video streams onto a fixed bandwidth output stream with minimum effect on video quality are described. A multiplexer provides feedback to a stagger transmitter to help it maintain its output bit rate. In addition, the stagger transmitter parses Network Abstraction Layers (NALs) from the given streams and makes decisions on which NALs to forward to the MUX.

Provided are a method for determining the packet type for a Scalable Video Coded (SVC) video bitstream, and a Real-time Transport Protocol (RTP) packetizing apparatus and method using the same. The method for determining a packet type for a Scalable Video Coded (SVC) video bitstream, which includes the steps of: a) deriving temporal and spatial hierarchy information between Network Abstraction Layer (NAL) units from field information defined in the NAL unit headers of scalable layers; b) detecting the type of encoding information by applying combined scalability encoding to the hierarchical structure of the Scalable Video Coding (SVC); and c) determining a Real-time Transport Protocol (RTP) packet type for the corresponding SVC video bitstream by using the derived temporal and spatial hierarchy information between the NAL units and the detected type of encoding information.

An encoding system includes a video coding layer (VCL) to generate slices when encoding multimedia data, a generic adaptation layer (GAL) to create, from the slices, a set of GAL units having a format that is generic to various transport systems, and a network adaptation layer (NAL) associated with a specific transport system to map the set of GAL units to the format of the specific transport system.

The invention concerns a method of transmitting video data comprising information bits (201), a video processing unit (10, 20, 40) with a control unit (12, 22, 42) for sending and/or receiving such video data, and a computer program product for the execution of said method. The method comprises the application of a systematic channel encoding (202) on the information bits (201) of the video data and obtaining a sequence comprising the encoded information bits (203) and error correction bits (204, 403) of the information bits (201). For transmission to another video processing unit (10, 20, 40), the encoded information bits (203) and the error correction bits (204, 403) are inserted into a primary coded picture network abstraction layer (205, 401) and a redundant coded picture network abstraction layer (206, 402), respectively. At the other video processing unit (10, 20, 40), the error correction bits (204, 403) in the redundant coded picture network abstraction layer (206, 402) are used for detecting (404) and correcting (405) errors in the received primary coded picture network abstraction layer (205, 401) and for performing the video decoding (407) of the corrected primary coded picture network abstraction layer (406).