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http://dx.doi.org/10.3745/KTCCS.2013.2.9.381

Efficient Transmission of Scalable Video Streams Using Dual-Channel Structure  

Yoo, Homin (LG전자 CTO부문 컨버전스연구소)
Lee, Jaemyoun (한양대학교 컴퓨터공학과)
Park, Juyoung (한양대학교 컴퓨터공학과)
Han, Sanghwa (한양대학교 컴퓨터공학과)
Kang, Kyungtae (한양대학교 컴퓨터공학과)
Publication Information
KIPS Transactions on Computer and Communication Systems / v.2, no.9, 2013 , pp. 381-392 More about this Journal
Abstract
During the last decade, the multitude of advances attained in terminal computers, along with the introduction of mobile hand-held devices, and the deployment of high speed networks have led to a recent surge of interest in Quality of Service (QoS) for video applications. The main difficulty is that mobile devices experience disparate channel conditions, which results in different rates and patterns of packet loss. One way of making more efficient use of network resources in video services over wireless channels with heterogeneous characteristics to heterogeneous types of mobile device is to use a scalable video coding (SVC). An SVC divides a video stream into a base layer and a single or multiple enhancement layers. We have to ensure that the base layer of the video stream is successfully received and decoded by the subscribers, because it provides the basis for the subsequent decoding of the enhancement layer(s). At the same time, a system should be designed so that the enhancement layer(s) can be successfully decoded by as many users as possible, so that the average QoS is as high as possible. To accommodate these characteristics, we propose an efficient transmission scheme which incorporates SVC-aware dual-channel repetition to improve the perceived quality of services. We repeat the base-layer data over two channels, with different characteristics, to exploit transmission diversity. On the other hand, those channels are utilized to increase the data rate of enhancement layer data. This arrangement reduces service disruption under poor channel conditions by protecting the data that is more important to video decoding. Simulations show that our scheme safeguards the important packets and improves perceived video quality at a mobile device.
Keywords
Streaming Service; Scalable Video Coding (SVC); Dual-Channel Repetition; Reed-Solomon Code; Block Interleaving; Perceived Quality;
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