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Rapid Channel Zapping for IPTV Broadcasting with Additional Multicast Stream

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4 Author(s)
C. Sasaki ; KDDI R&D Labs., Saitama ; A. Tagami ; T. Hasegawa ; S. Ano

This paper proposes a novel approach for improving channel zapping delay on IPTV broadcasting services. Channel zapping delay is a crucial issue for digital TV broadcasting, which entails audio/video data buffering before reproduction. Such delay could be mitigated in an IP environment if a receiver accelerated this buffering using additional burst transmissions from dedicated servers when a channel zap occurs. However, most conventional solutions are based on the unicast burst, which may cause an impulsive server/network load because channel zaps tend to happen simultaneously when programs are finished or suspended by commercial messages. To reduce this load, we propose a new multicast-based solution that takes into consideration the timing variation in channel zap on each receiver. We have confirmed a maximum 1-second reduction in the zapping delay using commercial multicast streams.

Published in:

2008 IEEE International Conference on Communications

Date of Conference:

19-23 May 2008