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To: William T. Katz who wrote (25970)12/2/1997 2:49:00 AM
From: JPM  Respond to of 50808
 
"The real nail in the coffin for DVD, though, comes from its original enemy, the VCR. And by this time next year, the newest iteration of the VCR - the digital VCR - should be taking over the market. The first such device, which is backward-compatible with standard VHS, comes out this year. The digital VCR will be bundled with a DBS satellite dish from which it can record MPEG-2 movies right from the digital feed."

Interestingly, this has no significance for CUBE... since CUBE makes encoders/decoders... and it really doesnt matter where the compressed information is stored...

Jp



To: William T. Katz who wrote (25970)12/2/1997 3:22:00 AM
From: Carnac  Read Replies (2) | Respond to of 50808
 
I think Mr. Dvorak is jumping the gun. He doesn't really understand what is behind D-VHS (most people don't. the truth is buried deep in the details). The D-VHS format has a few technical problems going against it:

1. MPEG-2 MP@ML encoders or even JVC's purported 14 mbit/sec simple I-frame MPEG-2 encoder are too pricy for late 1998. Blame JVC and the industry for lack of low-cost encoder chips.

2. The current crop of sub $1000 D-VHS machines can only record precompressed bitstreams. So there must be wide-spread digital video transmission. Are cable companies switching or augmenting their spectrum with digital broadcasts en mass in 1998 ?

3. The D-VHS machines only accept bitstreams via 1394 firewire. Few of the cable company settop boxes pass bitstreams through firewire. Check out next week's Western Cable Show in Anaheim to be sure.

4. D-VHS pre-recorded video manufacturing costs are high (>$3 a piece compared to $1.25 for DVD titles). This is because the D-VHS tape formula is based on a rather expensive and dense metal oxide, similar to S-VHS.

5. Well, JVC screwed up S-VHS by keeping prices high for both recorders and blank tapes. Given the technical similarities between D-VHS and S-VHS, why should they get wise this time ?

6. the figure of 44 Gbytes is based on a very thin tape formula (~10 microns) which yields 7 hours record time. If a regular VHS tape were to be 10 microns thick, you would have a record time of 12 hours. Look how much the 10 hour BASF tapes cost today --- and that's with standard density oxide formula.

7. Most people are happy time shifting and saving their programs on regular VHS. Even if the video signal existed as a digital bitstream at some intermediate point.

8. Everything about VHS is against digital bitstream recording (tracking, tape economy, head drum dimensions, etc.). The only reason to use VHS transport is forwards compatibility (can play/record regular VHS tape on D-VHS machine).

For more glossy details on D-VHS, see:

jvc-victor.co.jp

When a format comes along that can adapt to the bitrate of any broadcast, (maintain a constant areal payload bit density with no stuffing bytes), and addresses tape costs, maybe I will take $500 digital VCR seriously.

p.s. In the recent Byte article, I believe the Cube architects were giving a sub-$100 target for the DiVX encoder within 2 years (?).

C-Cube needs to price their encoder below $50 to make it successful in the CE business. There are also about $10 worth of IP royalties attached to any MPEG-2 encoder. The irony is that the longer low cost encoders take, the less need there will be for them (because more and more standard definition programming will be delivered in digital format as time goes on).

Our character profile/dossier on Bullcansay, Delay, and LeGump strongly suggests that they probably will become too complacent with the high end and miss the mark.

CHROMAC
"May your samples return from the fab in the form of camel chips."



To: William T. Katz who wrote (25970)12/2/1997 8:28:00 AM
From: BillyG  Respond to of 50808
 
Re: D-VCRs and DVD-RAM...........................

Let's go to the audio analogy. Some thought that CDs would never take of because they were not recordable. Recordable digital audio tape (DAT) didn't make a dent in the sudio CD market. Disc is inherently better than tape because of the ease of access (fast-forward, rewind), and the low media cost and long life of the disc. Tape -- even digital tape -- has dropouts. I don't agree with Dvorak -- again.



To: William T. Katz who wrote (25970)12/2/1997 10:19:00 PM
From: Anthony G. Breuer  Respond to of 50808
 
The downside of tape is that it is by nature a linear format. Digital VHS cannot provide random access nor can it be interactive to the extent a DVD can. As soon as DVD machines have the recird capability, digital VHS is history. (IMHO)