From: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
To: Akihiro TSUKADA <tskd08@gmail.com>
Cc: linux-media@vger.kernel.org
Subject: Re: [PATCH v4 3/4] tc90522: add driver for Toshiba TC90522 quad demodulator
Date: Wed, 24 Sep 2014 10:32:33 -0300 [thread overview]
Message-ID: <20140924103233.2efc00ed@recife.lan> (raw)
In-Reply-To: <5422B3D3.80209@gmail.com>
Em Wed, 24 Sep 2014 21:06:43 +0900
Akihiro TSUKADA <tskd08@gmail.com> 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
next prev parent reply other threads:[~2014-09-24 13:32 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-08 17:20 [PATCH v4 0/4] dvb: Add support for PT3 ISDB-S/T card tskd08
2014-09-08 17:20 ` [PATCH v4 1/4] mxl301rf: add driver for MaxLinear MxL301RF OFDM tuner tskd08
2014-09-08 17:33 ` Antti Palosaari
2014-09-08 17:20 ` [PATCH v4 2/4] qm1d1c0042: add driver for Sharp QM1D1C0042 ISDB-S tuner tskd08
2014-09-08 17:20 ` [PATCH v4 3/4] tc90522: add driver for Toshiba TC90522 quad demodulator tskd08
2014-09-23 20:07 ` Mauro Carvalho Chehab
2014-09-24 3:00 ` Akihiro TSUKADA
2014-09-24 9:28 ` Mauro Carvalho Chehab
2014-09-24 11:14 ` Akihiro TSUKADA
2014-09-24 11:30 ` Mauro Carvalho Chehab
2014-09-24 12:06 ` Akihiro TSUKADA
2014-09-24 13:32 ` Mauro Carvalho Chehab [this message]
2014-09-24 14:26 ` Akihiro TSUKADA
2014-09-08 17:20 ` [PATCH v4 4/4] pt3: add support for Earthsoft PT3 ISDB-S/T receiver card tskd08
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