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From: "Daniel Glöckner" <daniel-gl@gmx.net>
To: Limin Wang <lance.lmwang@gmail.com>
Cc: video4linux-list@redhat.com
Subject: Re: any recommendations for SD/SDI cards under linux?
Date: Thu, 13 Mar 2008 15:18:57 +0100	[thread overview]
Message-ID: <20080313141857.GA234@daniel.bse> (raw)
In-Reply-To: <20080313030209.GA8994@lmwangpc.yuvad.cn>

On Thu, Mar 13, 2008 at 11:02:09AM +0800, Limin Wang wrote:
> I have no clue about the SDI file format by the wiki, even I have reviewed
> SMPTE 259M document, it's described from hardware level. So any expert know
> which document describe the detailed format?

I think for SD-SDI it's like this:
143 Mb/s = Composite NTSC sampled at 14,3 MHz, SMPTE 244M
177 Mb/s = Composite PAL sampled at 17,7 MHz, IEC 61179-5
270 Mb/s = 4:2:2 Video sampled at 13,5 MHz, SMPTE 125M
360 Mb/s = 4:2:2 Video sampled at 18 MHz, SMPTE 267M

The first two require signal processing to separate luma and chroma.
The last one exceeds the bitrate of the DekTec card.
I doubt the last two standards will tell you a lot more than
"each line consists of {space for ANC} {SAV} {Cb Y Cr Y}+ {EAV}".

SMPTE 291M = How to add ancillary data
SMPTE 272M = How to pack uncompressed audio into ancillary frames
SMPTE 337M = How to pack compressed instead of uncompressed audio

  Daniel

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      reply	other threads:[~2008-03-13 14:20 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-12  8:25 any recommendations for SD/SDI cards under linux? Limin Wang
2008-03-12  9:19 ` Andrea Venturi
2008-03-12 10:16   ` Limin Wang
2008-03-12 11:38     ` Daniel Glöckner
2008-03-12 13:42       ` Limin Wang
2008-03-12 21:21         ` Daniel Glöckner
2008-03-13  3:02           ` Limin Wang
2008-03-13 14:18             ` Daniel Glöckner [this message]

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