From: Andy Walls <awalls@radix.net>
To: Trent Piepho <xyzzy@speakeasy.org>
Cc: v4l-dvb-maintainer@linuxtv.org, video4linux-list@redhat.com,
Jean Delvare <jdelvare@suse.de>,
Mauro Carvalho Chehab <mchehab@infradead.org>
Subject: Re: [v4l-dvb-maintainer] bttv driver errors
Date: Fri, 22 Aug 2008 09:45:20 -0400 [thread overview]
Message-ID: <1219412720.2695.1.camel@morgan.walls.org> (raw)
In-Reply-To: <1219407994.2855.24.camel@morgan.walls.org>
On Fri, 2008-08-22 at 08:26 -0400, Andy Walls wrote:
> On Thu, 2008-08-21 at 15:50 -0700, Trent Piepho wrote:
> > On Thu, 21 Aug 2008, Jean Delvare wrote:
> > > Le jeudi 21 aot 2008, Trent Piepho a crit:
> > > > On Wed, 20 Aug 2008, Jean Delvare wrote:
>
> > > > 4:2:0 YUV is achieved by setting the chip to 4:2:2 mode and then dropping
> > > > "every other" chroma line with RISC DMA program.
> > >
> > > OK. So you agree with me that this is approximative and not "real"
> > > vertical subsampling. I'm curious if more recent video chips are
>
> Strictly speaking subsampling happens at the A to D conversion. Follow
> on processes are filtering and, in this case, decimation.
Correcting myself on this point: "undersampling" happens at the A to D
conversion. Sorry for the misstatement.
Regards,
Andy
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next prev parent reply other threads:[~2008-08-22 13:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200808181918.05975.jdelvare@suse.de>
2008-08-18 18:43 ` [v4l-dvb-maintainer] bttv driver errors Trent Piepho
[not found] ` <200808202334.20872.jdelvare@suse.de>
2008-08-21 8:50 ` Trent Piepho
[not found] ` <200808211114.27290.jdelvare@suse.de>
2008-08-21 22:50 ` Trent Piepho
2008-08-22 12:26 ` [v4l-dvb-maintainer] " Andy Walls
2008-08-22 13:45 ` Andy Walls [this message]
2008-08-22 20:32 ` Daniel Glöckner
2008-08-22 20:54 ` Andy Walls
2008-08-25 0:07 ` Trent Piepho
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