From owner-freebsd-multimedia Thu May 14 22:57:01 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id WAA16060 for freebsd-multimedia-outgoing; Thu, 14 May 1998 22:57:01 -0700 (PDT) (envelope-from owner-freebsd-multimedia@FreeBSD.ORG) Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id WAA16054; Thu, 14 May 1998 22:56:57 -0700 (PDT) (envelope-from luigi@labinfo.iet.unipi.it) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id GAA01895; Fri, 15 May 1998 06:12:12 +0200 From: Luigi Rizzo Message-Id: <199805150412.GAA01895@labinfo.iet.unipi.it> Subject: Re: BT848 and VBI data To: rhh@ct.picker.com (Randall Hopper) Date: Fri, 15 May 1998 06:12:12 +0200 (MET DST) Cc: dnelson@slip.net, multimedia@FreeBSD.ORG, msh@FreeBSD.ORG, freebsd-multimedia@FreeBSD.ORG In-Reply-To: <19980514171530.B18554@ct.picker.com> from "Randall Hopper" at May 14, 98 05:15:11 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-freebsd-multimedia@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Since i just looked at it... www.norpak.ca has more info on the topic of VBI and intercast, and reading their pages makes me believe that intercast info might be embedded in the standard teletext format, so that decoding can be at least partially supported by the hardware. A description of the FEC algorithms used is not available from the norpak pages, but it might be the same one documented in some internet draft discussing the transmission of IP-over-VBI which should be available at www.ietf.org I'd be glad to do some experiments on this but i don't think i am reached by any intercast signal at the moment... cheers luigi -----------------------------+-------------------------------------- Luigi Rizzo | Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it | Universita' di Pisa tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ _____________________________|______________________________________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message