Title :
On Synchronization Frames for Channel Switching in a GOP-Based IPTV Environment
Author :
Jennehag, U. ; Pettersson, S.
Author_Institution :
Mid Sweden Univ. Sundsvall, Sundsvall
Abstract :
Traditionally, group of pictures (GOP) is used to solve IPTV channel tune-in issues. However, channel changes issued by a TV viewer are quite rare which indicates it is redundant to solve channel tune-in with GOP. In this paper we extend our earlier work on synchronization frames for channel switching (SFCS) for reducing bandwidth utilization in IPTV networks to include encoding/decoding standards not supporting Sl/SP-frames. We propose modifications to SFCS to work with MPEG-2. Channel tune-in quality and synchronization stream generation is also addressed. We provide bandwidth estimation expressions which are verified with an experimental simulation. Results show that SFCS adapted to MPEG-2 can reduce the bandwidth utilization with 9% compared to a traditional GOP system with equal steady state quality.
Keywords :
IP networks; bandwidth allocation; digital television; telecommunication channels; video coding; GOP-based IPTV environment; IPTV network; MPEG-2; bandwidth estimation; bandwidth utilization; channel tune-in quality; encoding/decoding standard; group of pictures; synchronization frames for channel switching; synchronization stream generation; Bandwidth; Decoding; Frequency synchronization; IPTV; Information technology; Steady-state; Streaming media; Switches; TV; Video on demand;
Conference_Titel :
Consumer Communications and Networking Conference, 2008. CCNC 2008. 5th IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1456-7
Electronic_ISBN :
978-1-4244-1457-4
DOI :
10.1109/ccnc08.2007.147
