Distortion-Based Slice Level Prioritization for Real-Time Video over QoS-Enabled Wireless Networks

Abstract

This paper presents a prioritization scheme based on an analysis of the impact on objective video quality when dropping individual slices from coded video streams. It is shown that giving higher-priority classified packets preference in accessing the wireless media results in considerable quality gain (up to 3 dB in tests) over the case when no prioritization is applied. The proposed scheme is demonstrated for an IEEE 802.11e quality-of-service-(QoS-) enabled wireless LAN. Though more complex prioritization systems are possible, the proposed scheme is crafted for mobile interactive or user-to-user video services and is simply implemented within the Main or the Baseline profiles of an H.264 codec.

Development of Recovery and Redundancy Model for Real Time Wireless Networks

“…The work ensures that the real-time was guaranteed while allowing a limited loss of frames. Ali et al [11] proposed distortion-based slice level prioritization for real-time video over QoS-enabled wireless networks. The work showed that given a higher-priority to some classified packets in accessing the wireless media, a considerable quality was achieved when prioritization is not used.…”

“…In designing a proficient MAC protocol for wireless networks, the characteristics like energy efficiency, scalability, adaptively, latency, channel utilization, throughput and fairness must be considered [10,11] . Collision occurs in wireless networks once two nodes transfer data at a time over transmission medium.…”