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多视图视频流中多个用户的流量减少
Traffic Reduction for Multiple Users in Multi‐View Video Streaming |
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| 课程网址: |
http://videolectures.net/icme2012_fujihashi_traffic_reduction/
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| 主讲教师: |
Takuya Fujihashi
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| 开课单位: |
静冈大学
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| 开课时间: |
2012-09-18
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| 课程语种: |
日语
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| 中文简介: |
多视图视频由多个视频序列组成，这些视频序列通过多个紧密间隔的摄像机从不同角度同时捕获。它使用户能够通过播放不同的视频序列来自由地改变他们的观点。多视图视频的传输需要比传统多媒体更多的带宽。为了减少带宽，基于MVC（多视图视频编码）的UDMVT（用户相关多视图视频传输）已被提出用于单个用户。在UDMVT中，对于多个用户，相同的帧被编码为每个用户的不同版本，这增加了冗余传输。对于这个问题，本文提出了UMSM（用户相关的多视图视频流用于多用户）。 UMSM具有两个特征。第一个特征是多个用户所需的重叠帧仅使用多播传输一次，以避免不必要的传输重复。第二个特征是调整多个用户的视频请求的时间延迟以与下一个请求一致。使用MERLshow提供的基准测试序列的仿真结果表明，与UDMVT相比，UMSM平均降低了观看相同多视图视频的5个用户的传输比特率55.3％。
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| 课程简介: |
Multi-view video consists of multiple video sequences captured simultaneously from different angles by multiple closely spaced cameras. It enables the users to freely change their viewpoints by playing different video sequences. Transmission of multi-view video requires more bandwidth than conventional multimedia. To reduce the bandwidth, UDMVT (User Dependent Multi-view Video Transmission) based on MVC (Multi-view Video Coding) has been proposed for single user. In UDMVT, for multiple users the same frames are encoded into different versions for each user, which increases the redundant transmission. For this problem, this paper proposes UMSM (User dependent Multi-view video Streaming for Multi-users). UMSM possesses two characteristics. The first characteristic is that the overlapped frames that are required by multiple users are transmitted only once using the multicast to avoid unnecessary duplication of transmission. The second characteristic is that a time lag of the video request by multiple users is adjusted to coincide with the next request. Simulation results using benchmark test sequences provided by MERL show that UMSM decreases the transmission bit-rate 55.3% on average for 5 users watching the same multi-view video as compared with UDMVT.
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| 关 键 词: |
多视图视频; 多媒体; 多播传输
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| 课程来源: |
视频讲座网
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| 最后编审: |
2019-04-17：lxf
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| 阅读次数: |
42
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