Data compression and transmission aspects of panoramic videos

Panoramic videos are effective means for representing static or dynamic scenes along predefined paths. They allow users to change their viewpoints interactively at points in time or space defined by the paths. High-resolution panoramic videos, while desirable, consume a significant amount of storage...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems for video technology 2005-01, Vol.15 (1), p.82-95
Main Authors: Ng, King-To, Chan, Shing-Chow, Shum, Heung-Yeung
Format: Article
Language:English
Subjects:
Algorithms
Bandwidth
Data compression
Dynamics
Internet
Local area networks
Networks
Servers
Online Access:Get full text
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Summary:Panoramic videos are effective means for representing static or dynamic scenes along predefined paths. They allow users to change their viewpoints interactively at points in time or space defined by the paths. High-resolution panoramic videos, while desirable, consume a significant amount of storage and bandwidth for transmission. They also make real-time decoding computationally very intensive. This paper proposes efficient data compression and transmission techniques for panoramic videos. A high-performance MPEG-2-like compression algorithm, which takes into account the random access requirements and the redundancies of panoramic videos, is proposed. The transmission aspects of panoramic videos over cable networks, local area networks (LANs), and the Internet are also discussed. In particular, an efficient advanced delivery sharing scheme (ADSS) for reducing repeated transmission and retrieval of frequently requested video segments is introduced. This protocol was verified by constructing an experimental VOD system consisting of a video server and eight Pentium 4 computers. Using the synthetic panoramic video Village at a rate of 197 kb/s and 7 f/s, nearly two-thirds of the memory access and transmission bandwidth of the video server were saved under normal network traffic.
ISSN:1051-8215
DOI:10.1109/TCSVT.2004.839989(410)1