Abstract
The advancement in wideband wireless network supports real time services such as IPTV and live video streaming. However, because of the sharing nature of the wireless medium, efficient resource allocation has been studied to achieve a high level of acceptability and proliferation of wireless multimedia. Scalable video coding (SVC) with adaptive modulation and coding (AMC) provides an excellent solution for wireless video streaming. By assigning different modulation and coding schemes (MCSs) to video layers, SVC can provide good video quality to users in good channel conditions and also basic video quality to users in bad channel conditions. For optimal resource allocation, a key issue in applying SVC in the wireless multicast service is how to assign MCSs and the time resources to each SVC layer in the heterogeneous channel condition. We formulate this problem with integer linear programming (ILP) and provide numerical results to show the performance under 802.16 m environment. The result shows that our methodology enhances the overall system throughput compared to an existing algorithm.
Highlights
Rapid advancement in mobile wideband wireless network (i.e., 4G and 5G) supports real time services such as IPTV and live video streaming
To alleviate the video performance degradation caused by the user who has the worst channel status, scalable video coding (SVC) [4] with adaptive modulation and coding (AMC) provides an excellent solution
SVC encodes video with the nested dependency: the base layer encodes the basic video quality and higher layers, called the enhancement layers, refine the visual quality from the base layer with smaller quantization granularities
Summary
Rapid advancement in mobile wideband wireless network (i.e., 4G and 5G) supports real time services such as IPTV and live video streaming. Multicast service in wireless heterogeneous networks can adaptively choose a certain modulation and coding scheme (MCS) [2] based on the channel status and the hardware capability of the receivers. For the nonscalable coding (or called a single-layer coding) the multicast data rate and video quality are determined by the user who experiences the worst channel status [1, 3]. To alleviate the video performance degradation caused by the user who has the worst channel status, scalable video coding (SVC) [4] with adaptive modulation and coding (AMC) provides an excellent solution. SVC can provide adaptive video quality in wireless networks, but its performance is poor in terms of video quality compared to single-layer coding. The newly established MPEG-4 SVC provides equal visual quality comparable with H.264/AVC (singlelayer coding) but with at most 10% higher bit rate
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