Re: [PATCH RFCv3] dvb: Add DVBv5 properties for quality parameters

[Mauro Carvalho Chehab <mchehab@redhat.com>]

Em Tue, 1 Jan 2013 22:18:49 +0530
Manu Abraham <abraham.manu@gmail.com> escreveu:

> On Tue, Jan 1, 2013 at 8:30 PM, Mauro Carvalho Chehab
> <mchehab@redhat.com> wrote:
> 
> > [RFCv4] dvb: Add DVBv5 properties for quality parameters
> >
> > The DVBv3 quality parameters are limited on several ways:
> >         - Doesn't provide any way to indicate the used measure;
> >         - Userspace need to guess how to calculate the measure;
> >         - Only a limited set of stats are supported;
> >         - Doesn't provide QoS measure for the OFDM TPS/TMCC
> >           carriers, used to detect the network parameters for
> >           DVB-T/ISDB-T;
> >         - Can't be called in a way to require them to be filled
> >           all at once (atomic reads from the hardware), with may
> >           cause troubles on interpreting them on userspace;
> >         - On some OFDM delivery systems, the carriers can be
> >           independently modulated, having different properties.
> >           Currently, there's no way to report per-layer stats;
> 
> per layer stats is a mythical bird, nothing of that sort does exist. 

Had you ever read or tried to get stats from an ISDB-T demod? If you
had, you would see that it only provides per-layer stats. Btw, this is
a requirement to follow the ARIB and ABNT ISDB specs.

Cheers,
Mauro