Unlock instant, AI-driven research and patent intelligence for your innovation.

A resource allocation method of ofdm system using scalable video coding

A technology of video coding and resource allocation, which is applied in the design field of layered multicast schemes, can solve problems such as exponential growth, and achieve the effects of low transmission power, high power efficiency, and improved utilization efficiency

Inactive Publication Date: 2015-11-25
NANJING UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-convex nature of the carrier allocation problem makes the above two types of resource allocation problems non-convex optimization problems, and the complexity of obtaining the optimal solution increases exponentially with the increase in the number of carriers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A resource allocation method of ofdm system using scalable video coding
  • A resource allocation method of ofdm system using scalable video coding
  • A resource allocation method of ofdm system using scalable video coding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The embodiment of the present invention provides a system optimization scheme combining scalable video coding and multi-user OFDM resource allocation, which is used to improve network utilization efficiency and system power efficiency.

[0013] The system transmission block diagram is as follows figure 1 As shown, the source coding adopts scalable video coding in H.264 / AVC, and the coded bit stream is transmitted through the OFDM system after passing through the resource allocation module. The user extracts different subcarrier sets for channel and source decoding, thereby recovering videos of different qualities.

[0014] Scalable video coding is divided into temporal, spatial and quality scalable. The basic idea of ​​scalable coding is to produce a base layer that contains important decoding information and multiple enhancement layers that increase frame rate, spatial resolution, and image quality. SVC provides 2 types of quality gradability: CGS and MGS. Since MGS...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a cross layer optimization scheme combining scalable video coding and resource distribution of an OFDM (Orthogonal Frequency Division Multiplexing) system. The scalable video coding can meet different QoS (Quality of Service) requirements of users for a video stream in a heterogeneous network; and an OFDM technology can flexibly distribute sub-carriers, powers and bits for the users according to QoS and channel conditions of the users. Due to consideration on the characteristics of the scalable video stream, different sub-carriers of OFDM are distributed to video packets with different priorities and by the optimal carrier, power and bit distribution, the system obtains the optimal power efficiency.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the design of a hierarchical multicast scheme for reducing power consumption in a multi-user OFDM system. Background technique [0002] With the continuous development of video coding, wireless transmission technology and intelligent terminals, future wireless networks will carry more and more video services such as videophone, video conferencing, mobile video on demand, and digital TV broadcasting. Video services are sensitive to delay, large average data volume, and large traffic changes, which makes the real-time transmission of video data much more difficult than voice and other low-traffic services. In order to realize the real-time transmission of massive video data in wireless channels with limited bandwidth and complex characteristics, and at the same time ensure the quality of service of video transmission, it is necessary to allocate resources reasonably according ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/2383H04N21/262H04N21/647H04N19/30
Inventor 唐岚张兴敢柏业超戴稚晖李多一
Owner NANJING UNIV