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AssigneeUniversity-Industry Cooperation Group of Kyung Hee University Kyunghee Univ. (Suwon Campus)
InventorsDoug Young Suh, Kyu Heon Kim, Gwang Hoon Park
Estimating the term…
The construction method of NALU (Network Abstraction Layer Unit) for IPv6 label switching and its using algorithms of video encoding, QoS control, and decoding are provided. According to an embodiment of the present invention, the NALU format is composed of the NALH (Network Abstraction Layer Header) including the label and the NAL (Network Abstraction Layer) payload. Here, the label is determined based on layer information which is combination of a spatial scalable level, a temporal scalable level, and a quality scalable level of the encoded data. The decoder uses the label to decide which one of multiple decoding modules is used to decode the current NAL payload. Moreover, the label can be included in the packet header so that the MANE (Media Aware Network Element) can use the label to decide whether to forward the packet or drop it. For example, the label in the packet header can be used for QoS control of video service by using the flow label field in IPv6 packet header. The IPv6 router can identify priority of the video packet by using the 20 bit long flow label, into which the label in NALH can be inserted. According to the embodiment, the MANE assumed in the MPEG and JVT (Joint Video Team) can be implemented effectively.
A method for delivering a packet by a packet generation apparatus, comprising the steps of:
A method for receiving a packet by a packet reception apparatus, comprising the steps of:
Dependencies are inferred from the claim text.
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Routing or path finding of packets in data switching networks: address processing for routing
Routing or path finding of packets in data switching networks: route determination based on requested QoS
Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass:…
Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]: adaptation for…
About 2 years 6 months of term left · ends 6 May 2029 (estimated)
This invention relates to video codec, more specifically, to a method of composing a packet for each MPEG video network abstraction layer unit (NALU) and its using video codec, QOS control based on IPv6 label switching, and decoding algorithm and apparatus.
Scalable video coding (SVC) and multi-view video coding (MVC) currently standardizing in MPEG/JVT (Joint Video Team) are based on H.264/AVC. The NALU format of H.264/AVC is used for packetization of encoded bitstream.
FIG. 1 shows conceptual structure of video coding layer (VCL) and network abstraction layer (NAL). As shown in FIG. 1, H.264/AVC is composed of the VCL which encodes moving pictures and the NAL which connects the VLC to lower system to transmit and store the encoded information. Independently of the bit stream generated by the VLC, there are sequence parameter set (SPS), picture parameter set (PPS), and supplemental enhancement information (SEI) for timing information for each picture, information for random access, and so on.
FIG. 1 is a conceptual diagram of relationship between VCL (Video Coding Layer) and NAL (Network Abstraction Layer) as in the H.264/AVC standard.
FIG. 2 is a block diagram to show the NALU format proposed in the current SVC standard.
FIG. 3 is a block diagram to show the conventional procedures to decide whether to forward a NALU (or a packet of a bitstream) in the MANE.
An embodiment of the present invention is explained in detail by using attached figures as follows.
FIG. 4 is a block diagram for NALU format as the first embodiment of the present invention. In FIG. 4, upper part shows the conventional NAL format while the lower part shows NALU format as the first embodiment of the present invention.
According to FIG. 4, the NALU format as an embodiment of the present invention includes SNALH (label type NALH) and NAL payload. Among them, NAL payload is the same as that in the conventional format. Therefore, as an embodiment of the present invention, the conventional NALH in a NALU is replaced by SNALH by using a certain size of label. This SNALH can be one byte long in which case number of possible labels is 28=256 or so.