From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from yop.chewa.net ([91.121.105.214]:48226 "EHLO yop.chewa.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751471Ab1KTU1y convert rfc822-to-8bit (ORCPT ); Sun, 20 Nov 2011 15:27:54 -0500 Received: from basile.remlab.net (cs27062010.pp.htv.fi [89.27.62.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: remi) by yop.chewa.net (Postfix) with ESMTPSA id 134871AF for ; Sun, 20 Nov 2011 21:27:53 +0100 (CET) From: "=?iso-8859-15?q?R=E9mi?= Denis-Courmont" To: linux-media@vger.kernel.org Subject: Re: [PATCH 1/8] [media] dvb: Allow select between DVB-C Annex A and Annex C Date: Sun, 20 Nov 2011 22:27:48 +0200 References: <1321800978-27912-1-git-send-email-mchehab@redhat.com> In-Reply-To: <1321800978-27912-1-git-send-email-mchehab@redhat.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 8BIT Message-Id: <201111202227.48948.remi@remlab.net> Sender: linux-media-owner@vger.kernel.org List-ID: Le dimanche 20 novembre 2011 16:56:11 Mauro Carvalho Chehab, vous avez écrit : > DVB-C, as defined by ITU-T J.83 has 3 annexes. The differences between > Annex A and Annex C is that Annex C uses a subset of the modulation > types, and uses a different rolloff factor. A different rolloff means > that the bandwidth required is slicely different, and may affect the > saw filter configuration at the tuners. Also, some demods have different > configurations, depending on using Annex A or Annex C. > > So, allow userspace to specify it, by changing the rolloff factor. I assume you'll bump the minor DVB version at some point too? -- Rémi Denis-Courmont http://www.remlab.net/ http://fi.linkedin.com/in/remidenis