[opendtv] Re: Multi-band TV receiver and DVB-H
- From: "John Shutt" <shuttj@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 26 May 2004 13:37:07 -0400
Bert,
The 15 mbps is the MAXIMUM in an 8MHz channel dedicated to only DVB-H, using
the 'new' 4K carrier scheme. It is not the minimum required bitrate that
would have to be allocated within a DVB-T multiplex.
Did you read the two short papers I linked? 2 Mbps within a standard DVB-T
multiplex is plenty for the tiny screen. One scenario was using HM-COFDM
with the DVB-H in the robust stream.
E-VSB will never be included in handheld devices for the same reason that
DVB-T was considered and rejected - POWER CONSUMPTION. The onus of DVB-H is
to lower power consumption of the receiver by grouping related data packets
in such a way that the receiver can multiplex on and off.
Cheers,
John Shutt
----- Original Message -----
From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Wednesday, May 26, 2004 1:09 PM
Subject: [opendtv] Re: Multi-band TV receiver and DVB-H
> John Shutt wrote:
>
> > You seem to imply that DVB-H is only broadcast separately
> > from DTT. It can
> > be, but it is also designed to be included as part of a normal DVB-T
> > transmission, and that is where the power of DVB-H comes in.
>
> I suppose so, but it wouldn't make a whole lot of sense. If
> you want to dedicate 10 to 15 Mb/s to the DVB-H stream, you would be
> reducing the DVB-T stream size to the point of irrelevance.
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