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- Path: sparky!uunet!noc.near.net!news.bbn.com!NewsWatcher!user
- From: shetline@bbn.com (Kerry Shetline)
- Newsgroups: rec.video
- Subject: Re: Laser Disk combi players...
- Followup-To: rec.video,rec.audio
- Date: 30 Dec 1992 00:20:23 GMT
- Organization: BBN
- Lines: 65
- Distribution: world
- Message-ID: <shetline-291292184322@128.89.19.72>
- References: <184728@pyramid.pyramid.com>
- NNTP-Posting-Host: bbn.com
-
- In article <184728@pyramid.pyramid.com>, lstowell@pyrnova.mis.pyramid.com
- (Lon Stowell) wrote:
- > >Couple of side notes if needed: I do have a Mitsubishi screen with
- > >S-video, and this is required. I am equipped for surround sound with
- > >Denon, Mission speakers and Velodyne subwoofer (F1000), so lead on
- > >guru's...
- >
- > WHY is the S-video "required"? Laserdisk does not inherently
- > have the problems of VCR's....so it really doesn't need S-video.
- >
- > In your price range, going with S-video is going to HURT video
- > quality....use the standard video output on the laserdisk.
- >
- > Laserdisks with S-video outputs have to internally convert the
- > video signal to the S-video format. This added function always
- > adds cost....and GOOD conversion costs more than cheap
- > conversion. But why bother...it does no good and is likely to
- > do harm.
-
- 'Required' may have been too strong a word (I doubt that the Mitsubishi has
- ONLY S-video), but I might guess that Mr. Anschuetz would prefer to
- simplify his system by keeping everything S-video and skipping composite
- video entirely.
-
- When I first heard of S-video for a laserdisc player it seemed strange --
- laserdiscs contain a composite video signal (the luminance(Y) and
- chrominance(C) signals are already mixed). However, making a really good
- comb filter to separate Y from C can be tricky, and the jitter in a video
- disc-delivered signal can make the proper frequency notch a moving target.
- A good player can use timing information from the servo motor to improve
- the Y/C separation process, doing a (slightly) better job than an external
- circuit could.
-
- As for Pioneer equipment, I've had mixed results. I had an old, fairly
- vanilla unit that did a good job for what it was capable of. It is still
- providing good service to a friend to whom I sold it. I tried upgrading to
- a 3090 (top-of-the-line at the time, excluding the multi-$1000 Elite
- series), and had some annoying problems that occured on two units I brought
- home and others on display at stores. One was with drop-outs. Even my old
- LD-838 handled these gracefully. Using a technique that has been around
- since the first players, drop-outs are supposed to be filled in using a
- delay-line to substitute the missing info with a signal from a previous
- scan line. The 3090, with its digital field memory, should have been able
- to do this especially well. But with a couple of disc I tried, it didn't do
- it at all, resulting in white streaks across the picture.
-
- The other major problem was that it just couldn't play certain disc titles
- from one particular manufacturer. Ultimately, this turned out to be a disc
- mastering problem. Regardless, no other machines cared about it, so the
- expensive 3090 should have been just as forgiving.
-
- On top of that, the drive was very noisy, so while the specs might have
- given nice ratings for the sound quality, you would have to use good
- headphones or operate the 3090 in another room to get the practical benefit
- -- noise is noise, regardless of whether it comes over the wires or
- straight through the air from an offensive motor.
-
- At the time, a number of dealers were feeling grouchy about this and told
- me that they felt that, in general, Pioneer's quality was going down. I
- ended up buying a Panasonic LV-1000 with which I am quite pleased. This is
- definitely out of the original price range mentioned of $400-$500, however.
- What current Pioneer stuff is like, especially at lower prices, I don't
- know.
-
- -Kerry
-