manu at kromtek.com
Wed Feb 16 10:33:55 CET 2005
> -----Original Message-----
> From: linux-dvb-bounces at linuxtv.org [mailto:linux-dvb-bounces at linuxtv.org]
> On Behalf Of Manu Abraham
> Sent: Wednesday, February 16, 2005 2:11 PM
> To: Hari_Mohan
> Cc: linux-dvb
> Subject: Re: [linux-dvb] [RFC]
> Hari_Mohan wrote:
>>I don't know much about this but I have seen this in a dvb demodulator
>>output and ASI convertors. These lines were termed DVALID and these used
>>stay high whenever there is valid data in the transport stream
>>bus-8bit/serial. This line stays low when there are some special
>>coming in the bus. I think this flag is related to that. Even error line
>>also is similar - ie whenever there were some uncorrectable errors this is
>>supposed to stay low - depends on your configuration
> What i was wondering was that, whether this information could help in
> the upper space DVB API/driver in any manner, in terms of error
> correction and or other aspects.
> According to my knowledge mpeg decoder chips will clock in the data based on
> the state of these lines. I don't know whether any hardware mechanism is
So is this information more reliable than the 13818-1 Discontinuity flag.. ?
such that this information can be used to identify cases where we have
problems in the TS.. ?
since under the Linux DVB API, we don't have an exact solution for
discontinuity, and TS errors to a 100% effectiveness, would these flags
be useful for solving that problem ?
For a particular DVB card, i can get these signals out from the frontend
to the card and the driver.. So, considering that aspect if i get these
flags out, i was wondering whether it would be possible to have a
solution for the latter errors..
That was the query that i had in my mind..
> there to store these values and use for upper layer applications. Because
> stv299 may have separate APIs to calculate BER and signal quality.
>>From: linux-dvb-bounces at linuxtv.org [mailto:linux-dvb-bounces at linuxtv.org]
>>On Behalf Of Manu Abraham
>>Sent: Wednesday, February 16, 2005 12:27 AM
>>Subject: [linux-dvb] [RFC]
>>Is there any advantage in getting the following flags out from the tuner
>>(STV0299 based).. such that it might be of some help.. ?
>>(1) data valid
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