[linux-dvb] Writing DVB Software - couple questions

Chris Warren dvb at ixalon.net
Wed Feb 23 00:46:24 CET 2005


> -----Original Message-----
> From: linux-dvb-bounces at linuxtv.org 
> [mailto:linux-dvb-bounces at linuxtv.org] On Behalf Of Johannes 
> Stezenbach
> Sent: 22 February 2005 23:41
> To: linux-dvb at linuxtv.org
> Subject: Re: [linux-dvb] Writing DVB Software - couple questions
> 
> [snip]
> Yeah. Some values *are* scaled into 0..0xffff (e.g. snr), but 
> that still doesn't mean that you get well-defined values. 
> E.g. some cards will return 0x1234 and others 0x2345 for the 
> same input signal. I don't know how you want to calibrate 
> this, even if you'd have a zoo of cards to compare against 
> each other I guess that for consumer equipment even two 
> "identical" cards will return different values...
> 
> Johannes
> 
One idea might be in the client software to keep a record of the minimum and
maximum experienced value and display a percentage/value based on this. So
you get a scale from 0%-100% for the known limits of the current setup.

Chris





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