Em Wed, 24 Sep 2014 21:06:43 +0900
Akihiro TSUKADA <[email protected]> escreveu:
> > And TMCC returns it as 0, 1, 2, 3, 4, instead of 0, 1, 2, 4, 8.
>
> According to ARIB STD B31 3.15.6.7 (table 3.30),
> The value is encoded and depends on the "mode".
> so demods have to encode/decode anyway.
Ok, but see the definition at the API spec:
http://linuxtv.org/downloads/v4l-dvb-apis/FE_GET_SET_PROPERTY.html#isdb-hierq-layers
Basically, we use 0, 1, 2, 4 no matter what mode, e. g.
DTV_ISDBT_LAYERA_TIME_INTERLEAVING 1
means:
Interleave = 4 for mode 1
Interleave = 2 for mode 2
Interleave = 1 for mode 3
> > AFAIKT, that doesn't work in Sound Broadcast mode, as the demod won't
> > be able to read the TMCC (at least on most demods - don't have any
> > details about tc90522).
>
> I forgat ISDB-Tsb;P, as in Japan terrestrial digital sound broadcast
> was cancelled in 2011 and it was unpopular.
Ah, I wasn't aware that ISDB-Tsb was cancelled in Japan.
Regards,
Mauro
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