About VoIP
VoIP basically using the internet to make telephone calls - saving money in the process for the consumer - often VoIP to VoIP calls are free. Now that I think about it I know people that use it now - for calling overseas and interstate. It has also been adopted commercially, e.g. Coles Myer also uses the technology to call between offices.
VoIP challenges:
* Delay/Network Latency
* Packet loss
* Jitter
* Echo
* Security
About IPTV
IPTV operates over a closed network and is in competition with content delivered over the internet (Internet Television).
Simple Definition
simpler definition of IPTV would be television content that, instead of being delivered through traditional formats and cabling, is received by the viewer through the technologies used for computer networks.
IPTV began in 1994 with the ABC's World News Now being the first TV show to be broadcast over the net. Projected audiences of IPTV are expected to be 400 million by 2010. (Wikipedia 2007)
IPTV can be free or fee based. Currently there are 1300 free IPTV channels available on the net. IPTV can also work with HDTV.
How does it work?
IPTV uses a two-way digital broadcast signal sent through a switched telephone or cable network by way of a broadband connection and a set-top box programmed with software (much like a cable or DSS box) that can handle viewer requests to access to many available media sources.
IPTV can use both live TV and Video on Demand (VoD).
Advantages of IPTV
- frees up bandwidth
- increases interactivity
- VoD
- better compression
- triple play
- IPTV based Converged Services
Disadvantages
- sensitive to packet loss and delays if Internet speed slow
- Security
Other Sources
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