ACHIEVING SHORT CHANNEL ZAPPING TIME IN IPTV
A.BRINDHA 1, S.CAMMILLUS
2
1PG Student, 2Assistant
Professor[SG]
1,2Department of ECE,National
Engineering College (Autonomous),Kovilpatti, Tamilnadu, India.
IP-Based TV systems are mainly used to stream the
multimedia content over the internet. The video
content for IPTV is streamed in the form of frames and stored in the buffer. Other than the
channel being watched, a client also streams an extra combination of adjacent
channel which consists of video segments sampled from a group of channels that
a client might watch in the near future. Video segments streamed from the
internet will be stored in a local buffer. Compared with the ordinary broadcast TV systems,
IP-based TV systems suffer from a much
longer channel switching
delay. One of the most challenging issues in IPTV is the
channel zapping time. Due to bandwidth limitations and buffer size at user
side, prevents the user from receiving all the channels at the buffer for the
same time. When
the client issues a channel switching request to a target channel, the client
will immediately playback the most recently downloaded frame of the target
channel, leading to close-to-zero channel switching time. Thus the buffer shape
can be changed in the form of a matrix so that the rearrangement of data is
much simpler and the buffer delay is reduced to some extent. The streamed
frames of the video will have a large amount of redundant data. The redundant
data can be removed by using the fuzzy compression technique. The removal of
redundant data will lead to the reduction in the amount of data being streamed
from the network and thus the buffer size can also be reduced to a considerable
amount.
