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Date Posted: 00:16:40 03/18/02 Mon
Author: Oliver
Author Host/IP: ACB205F3.ipt.aol.com / 172.178.5.243
Subject: Re: D-VHS Analog Taping
In reply to: Molly Jacobsen 's message, "D-VHS Analog Taping" on 09:02:28 03/16/02 Sat

Hi,

>record in an LS mode...I'd like as many hours per tape
>as possible to save space. I know DISH has a D-VHS
>that is DISH compatible...(I would be recording
>HomeSat satellte courses)...Our TV is analog. My
>questions...
>1 How many hours can we record...is it up to 49 hours?

There are 2 sorts of recording techniques:

1. From analog sources via MPEG encoding
2. From digital sources via bitstreaming

If you tape via bitstreaming, you have to use the datarate as it is broadcasted. So if is broadcasted with 4.8 mbps or higher, you have to use standard mode with 14.1 mbps (max 8 hours), because the "longplay" LS3 is limited to 4.7 mbps.

If you tape with encoding, you set the bitrate by yourself and it depends on the quality you want to record. With LS3 you can get up to 24 hours on a cassette (superior to the quality of S-VHS).

Modes with lower bitrates are not used today - the quality would be significant bad too. ;-)

>3. For expandability/upgradability, is one system
>better than another?

Best are recorders with both bitstreaming and encoding technique, especially the new recorders with "D-Theater" because the can play pre-recorded NTSC HDTV videos.

Regards, Oliver

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