TIIS (한국인터넷정보학회)
Current Result Document :
| 한글제목(Korean Title) |
Queueing Theoretic Approach to Playout Buffer Model for HTTP Adaptive Streaming |
| 영문제목(English Title) |
Queueing Theoretic Approach to Playout Buffer Model for HTTP Adaptive Streaming |
| 저자(Author) |
Jiwoo Park
Kwangsue Chung
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| 원문수록처(Citation) |
VOL 12 NO. 08 PP. 3856 ~ 3872 (2018. 08) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
HTTP-based adaptive streaming (HAS) has recently been widely deployed on the Internet. In the HAS system, a video content is encoded at multiple bitrates and the encoded video content is segmented into small parts of fixed durations. The HAS client requests a video segment and stores it in the playout buffer. The rate adaptation algorithm employed in HAS clients dynamically determines the video bitrate depending on the time-varying bandwidth. Many studies have shown that an efficient rate adaptation algorithm is critical to ensuring quality-of-experience in HAS systems. However, existing algorithms have problems estimating the network bandwidth because bandwidth estimation is performed on the client-side application stack. Without the help of transport layer protocols, it is difficult to achieve accurate bandwidth estimation due to the inherent segment-based transmission of the HAS. In this paper, we propose an alternative approach that utilizes the playout buffer occupancy rather than using bandwidth estimates obtained from the application layer. We start with a queueing analysis of the playout buffer. Then, we present a buffer-aware rate adaptation algorithm that is solely based on the mean buffer occupancy. Our simulation results show that compared to conventional algorithms, the proposed algorithm achieves very smooth video quality while delivering a similar average video bitrate.
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| 키워드(Keyword) |
HTTP-based adaptive streaming (HAS)
bitrate adaptation
playout buffer model
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| 파일첨부 |
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