| Presentation | 2004-09-16 A Study of QoS Control Scheme for Multiple-Bit-Rate Video Streaming Service Takanori HAYASHI, Ginga KAWAGUTI, Jun OKAMOTO, Akira TAKAHASHI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a QoS control method for a multiple-bit-rate video streaming service, which is suitable for improving the quality that all users perceive. First, we propose a quality estimation model that properly represents users' perceptions of distributed video signals whose quality is time-variant due to the dynamic bit-rate control. The factors affecting the users' perceptions were considered based on a subjective quality experiment. The proposed model enables the accuracy of estimating overall subjective quality to be improved compared with a model that averages segmental quality. The estimation error of the proposed model is almost equivalent to the statistical reliability of a subjective score. Second, we propose a QoS control method considering the above subjective quality characteristics. Specifically, it can improve users' perceptual quality by allocating the minimum bandwidth for each video flow and reducing the usable bandwidth of flows whose bit-rate fell in the past when a network is congested. Third, we evaluated the proposed QoS control method by simulation. We found that it improved quality, i.e., the average quality was improved for all users. Finally, we discuss guidelines for quality design/management for a multiple-bit-rate video streaming service. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Video streaming / Multiple-bit-rate / video quality / subjective assessment / Time-variant / QoS control |
| Paper # | CQ2004-78,OIS2004-32,IE2004-39 |
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| Conference Information | |
| Committee | CQ |
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| Conference Date | 2004/9/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Communication Quality (CQ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study of QoS Control Scheme for Multiple-Bit-Rate Video Streaming Service |
| Sub Title (in English) | |
| Keyword(1) | Video streaming |
| Keyword(2) | Multiple-bit-rate |
| Keyword(3) | video quality |
| Keyword(4) | subjective assessment |
| Keyword(5) | Time-variant |
| Keyword(6) | QoS control |
| 1st Author's Name | Takanori HAYASHI |
| 1st Author's Affiliation | NTT Corp., NTT Service Integration Labs.() |
| 2nd Author's Name | Ginga KAWAGUTI |
| 2nd Author's Affiliation | NTT Communications Corp., Innovative IP Architecture Center |
| 3rd Author's Name | Jun OKAMOTO |
| 3rd Author's Affiliation | NTT Corp., NTT Service Integration Labs. |
| 4th Author's Name | Akira TAKAHASHI |
| 4th Author's Affiliation | NTT Corp., NTT Service Integration Labs. |
| Date | 2004-09-16 |
| Paper # | CQ2004-78,OIS2004-32,IE2004-39 |
| Volume (vol) | vol.104 |
| Number (no) | 309 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |