Date: Thu, 13 Feb 1997 15:52:57 -0700 (MST) From: Don Yuniskis <dgy@rtd.com> To: hasty@rah.star-gate.com (Amancio Hasty) Cc: pete@sms.fi, dgy@rtd.com, multimedia@freebsd.org Subject: Re: broadcast video Message-ID: <199702132252.PAA16403@seagull.rtd.com> In-Reply-To: <199702130859.AAA08354@rah.star-gate.com> from "Amancio Hasty" at Feb 13, 97 00:59:42 am
next in thread | previous in thread | raw e-mail | index | archive | help
It seems that Amancio Hasty said: > >From The Desk Of Petri Helenius : > > Amancio Hasty writes: > > > > > > H.261 or H.263 are great for real time encoding for TV quality > > > you probably would want to use mpeg. So just read a little > > > on H.261, H.263, and mpeg. mpeg is almost tv quality depends > > > on the kind of encoder options that you give to the mpeg > > > encoder. > > > > > > On todays, fast PCs we can do mpeg playback in software. > > > > When you say MPEG above I take it that you were saying MPEG-1 since > > MPEG-2 can go beyond broadcast TV quality and is not that well > > decodable with software (the CPU power is not just there yet) > > Yes, I meant MPEG-1 and MPEG-2 is supposed to HDTV or higher > quality than TV. Yes, I understood that from the limited research I had already done. But, as I dig further into this, it seems like MPEG-*2* is intended for NTSC video. From a FAQ (URL not available off hand, sorry...) "The emphasis for the DVD movie player [a DVD FAQ, obviously :>] is on high quality, 720x480 (NTSC), 60 field per second video encoded from 24 frame per second film..." But, *those* numbers don't "add-up", either. as "480" lines are not displayed at 60Hz (since the display is interlaced) and I think the active video is less than 720 wide... Hmmm... I guess I need to locate some video codec manufacturers and look at some data sheets to get a firmer understanding... --don
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199702132252.PAA16403>