On Tue, Jan 1, 2013 at 10:59 PM, Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> wrote: > Em Tue, 1 Jan 2013 22:18:49 +0530 > Manu Abraham <abraham.manu@xxxxxxxxx> escreveu: > >> On Tue, Jan 1, 2013 at 8:30 PM, Mauro Carvalho Chehab >> <mchehab@xxxxxxxxxx> 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. I understand you keep writing junk for ages, but nevertheless: Do you have any idea what's a BBHEADER (DVB-S2) or PLHEADER (DVB-T2) ? The headers do indicate what MODCOD (aka Modulation/Coding Standard follows, whatever mode ACM, VCM or CCM) follows. These MODCOD foolows a TDM approach with a hierarchial modulation principle. This is exactly what ISDB does too. And for your info: " The TMCC control information is common to all TMCC carriers and error correction is performed by using difference-set cyclic code." Manu -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
