[opendtv] Re: [Mp4-tech] Re: HDTV and SDTV Decoders for MPEG-2 andMPEG-4 AVC
- From: John McClenny <jamcclenny@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 16 Feb 2005 07:29:46 -0600
On Wed, 16 Feb 2005 14:30:11 +0530, Prashant Desai
<prashant.desai@xxxxxxxxxx> wrote:
> Craig
>
> thanks for your detailed reply ........i got your point...... what i am not
> able to understand wrt to the STB is
> see in case of cable based iTV deployments they require multiple tuners
> [ say 2 tuners ] so that the user can do both ......i mean user can watch
> TV and simultaneously record the TV programe for PVR ......... correct ?
>
> but since in case of IPTV there isnt any concept of tuners since it's
> purely on IP multicast so in such case what is required on the STB which is
> IP equivelent of STB tuners .....so the user can do both the things at the
> same time that is user can watch the TV and also record the programe at the
> same time
The limitations are network bandwidth and the processing power of the
STB to grab the content and store it on a disk drive while still
keeping the live video display happy. There isn't anything like a
tuner in an IPTV box, just a single physical Ethernet connection with
logical multicast/unicast streams carried over it.
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