{ { IPTV IPTV I Internet Protocol television (IPTV) is a system through which Internet television services are delivered using the architecture and networking methods of the Internet Protocol Suite over a packet-switched network infrastructure, e.g., the Internet and broadband Internet access networks, instead of being delivered through traditional radiofrequency broadcast, satellite signal, and cable television(CATV) formats.
Services of IPTVLive television:with or without interactivity
related to the current TV show.Time-shifted programming: catch-up
TV (replays a TV show that was broadcast hours or days ago),
start-over TV (replays the current TV show from its
beginning).Video on demand(VOD): browse a catalog of videos, not
related to TV programming.
The use of satellite to carry IP is fundamental to overcoming
the greatest shortcoming of IPTV over terrestrial cables the
speed/bandwidth of the connection.IPTV is largely neutral to the
transmission medium, and IP traffic is already routinely carried by
satellite for Internet backbone trunking IPTV via satellite
Hybrid IPTV refers to the combination of traditional broadcast
TV services and video delivered over either managed IP networks or
the public Internet. It is an increasing trend in both the consumer
and pay TV [operator] markets.Hybrid IPTV
The cable industry's expenditures of approximately $1 Billion
per year are based on network updates to accommodate higher data
speeds. Most operators use 2-3 channels to support maximum data
speeds of 50 Mb/s to 100 Mb/s.The economics of IPTV
Converged services implies interaction of existing services in a
seamless manner to create new value added servicesOne good example
is On-Screen Caller ID, getting Caller ID on your TV and the
ability to handle it (send it to voice mail, etc.) IP-based
services will help to enable efforts to provide consumers
anytime-anywhere access to content over their televisions, PCs and
cell phones, and to integrate services and content to tie them
together. Within businesses and institutions, IPTV eliminates the
need to run a parallel infrastructure to deliver live and stored
video servicesIPTV-based converged services
The IP-based platform offers significant advantages, including
the ability to integrate television with other IP-based services
like high speed Internet access and VoIP. It may also provide a
means to hack into, or at least disrupt (see Denial of Service) the
private network.Advantages of IPTV
IPTV is sensitive to packet loss and delays if the streamed data
is unreliable.Due to the limitations of wireless, most IPTV service
providers today use wired home networking technologies instead of
wireless technologies like 802.11. Service Providers such as
AT&T (which makes extensive use of wireline home networking as
part of its U-Verse IPTV service) have expressed support for the
work done in this direction by ITU-T, which has adopted
Recommendation G.hn (also known as G.9960), which is a next
generation home networking standard that specifies a common PHY/MAC
that can operate over any home wiring (power lines, phone lines or
coaxial cables)Limitations
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Thank UPrepared by: Utkarsh Srivastava B-tech (c.s.)3rd year
