From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from perceval.ideasonboard.com ([95.142.166.194]:44970 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752478Ab1GDWrP (ORCPT ); Mon, 4 Jul 2011 18:47:15 -0400 From: Laurent Pinchart To: Mauro Carvalho Chehab Subject: Re: [RFC] DV timings spec fixes at V4L2 API - was: [PATCH 1/8] v4l: add macro for 1080p59_54 preset Date: Tue, 5 Jul 2011 00:47:43 +0200 Cc: Tomasz Stanislawski , linux-media@vger.kernel.org, m.szyprowski@samsung.com, kyungmin.park@samsung.com, hverkuil@xs4all.nl References: <1309351877-32444-1-git-send-email-t.stanislaws@samsung.com> <1309351877-32444-2-git-send-email-t.stanislaws@samsung.com> <4E11E5AE.30304@redhat.com> In-Reply-To: <4E11E5AE.30304@redhat.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201107050047.44275.laurent.pinchart@ideasonboard.com> List-ID: Sender: Hi Mauro, On Monday 04 July 2011 18:09:18 Mauro Carvalho Chehab wrote: [snip] > 1) PRESET STANDARDS > ====== ========= > > There are 3 specs involved with DV presets: ITU-R BT 709 and BT 1120 and > CEA 861. > > At ITU-R BT.709, both 60Hz and 60/1.001 Hz are equally called as "60 Hz". > BT.1120 follows the same logic, as it uses BT.709 as a reference for video > timings. > > The CEA-861-E spec says at item 4, that: [snip] > At the same item, the table 2 describes several video parameters for each > preset, associating the Video Identification Codes (VIC) for each preset. This might be a bit out of scope, but why aren't we using the VICs as DV presets ? -- Regards, Laurent Pinchart