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'Digital Cameras'
1997\07\28@202002 by Peter Wintulich

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The SONY camera I know of is based upon the MiniDisk.

I under stand these are the features
   :has all the normal audio MD functions
   :stores up to 2000 photos on one MiniDisk
   :can record audio at the same time as photos are taken
   :has a fast computer interface which allows the MD to be
      accessed the same as a floppy drive (read & write).
   :photos are accessable as ".jpg" files

I have not found the URL that contained this product.
It is about 3 months old.

1997\07\28@224635 by Lee Jones

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> The SONY camera I know of is based upon the MiniDisk.

What's the capacity of the "MiniDisk"?  Earlier postings
on this camera stated 3.5" floppy.

> I under stand these are the features
>     :stores up to 2000 photos on one MiniDisk

Assuming the 3.5" floppy capacity is in the ballpark, then
the camera has to store 2000 images in 1.4MB.  Hmmm...

Assuming each image has a resolution of 100 x 150 (15,000
pixels) x 2 octets/pixel (15 bit color), then each image
needs 30KB of storage.  2000 images would take 600MB of
disk storage.

Or it requires a compression ratio of 41:1.  Seems unlikely.

                                               Lee Jones

1997\07\29@033110 by wterreb

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Lee Jones <spam_OUTleeTakeThisOuTspamFRUMBLE.CLAREMONT.EDU> wrote:

>> The SONY camera I know of is based upon the MiniDisk.
> What's the capacity of the "MiniDisk"?  Earlier postings
> on this camera stated 3.5" floppy.
>> I under stand these are the features stores up to 2000 photos
>> on one MiniDisk
> Assuming the 3.5" floppy capacity is in the ballpark,
> then the camera has to store 2000 images in 1.4MB.
> Hmmm...

I think you are confused about what a MiniDisk really is.  If we are
talking about the same MiniDisks that Sony use in their MiniDisk
players for audio, then the storage capacity is very close to that
of normal CD's, namely 650 Mb.  At least, one MiniDisk can store the
same length of near CD quality sound that you can fit on an ordinary
CD.

> Assuming each image has a resolution of 100 x 150
> (15,000 pixels) x 2 octets/pixel (15 bit color), then
> each image needs 30KB of storage.  2000 images would
> take 600MB of disk storage.

All of which sounds about right, and the MiniDisk should be able to
handle that.

Rgds
Werner
--
Werner Terreblanche     users.iafrica.com/w/we/wernerte/index.htm
.....wterrebKILLspamspam@spam@plessey.co.za (work)  OR  wernertespamKILLspamiafrica.com  (home)
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Tel +27 21 7102251  Fax +27 21 7102886  Home +27 21 8872196
------------------------------------------------------------

1997\07\29@033116 by Mike

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At 09:59 AM 7/29/97 +0830, you wrote:
>The SONY camera I know of is based upon the MiniDisk.

Here is a URL of a SONY Camera that uses NORMAL 3.5" PC floppies and stores
in JPEG format.

       http://www.sel.sony.com/SEL/consumer/mavica/

Rgds

Mike
Perth, Western Australia

1997\07\29@094618 by Martin R. Green

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I've been reading this thread for a while now, and since it's starting
to get really mixed up, it's time for me to comment.

The camera in question is a "Mavica", which is a name used by Sony for
it's digital cameras for at least 15 or 20 years (the first ones were
very impractical and VERY expensive, with poor quality).  The new
Mavica's claim to fame is that it stores images on a regular 1.44Mb
floppy disk.  I have seen several ads for the Mavica recently, as well
as a writeup in a couple of electronics magazines.  I forget the exact
capacity of a floppy, but it is in the order of 20-50 images per disk,
not 2000, with double the capacity if image compression is used.

Obviously the beauty of this new camera is that, like a film camera, the
number of pictures you can take at a time is limited only by the number
of floppies you have in your pocket (or rolls of film), and switching
floppies is a lot quicker than swapping rolls of film.  Most of the
digital cameras out there right now store images on expensive flash
cards or mini hard disks.

Hope this clears up the confusion.

Martin R. Green
.....mrgreenKILLspamspam.....bigfoot.com

----------
From:   Werner Terreblanche[SMTP:EraseMEwterrebspam_OUTspamTakeThisOuTplessey.co.za]
Sent:   Tuesday, July 29, 1997 5:36 AM
To:     PICLISTspamspam_OUTMITVMA.MIT.EDU
Subject:        Re: Digital Cameras

Lee Jones <@spam@leeKILLspamspamFRUMBLE.CLAREMONT.EDU> wrote:

>> The SONY camera I know of is based upon the MiniDisk.
> What's the capacity of the "MiniDisk"?  Earlier postings
> on this camera stated 3.5" floppy.
>> I under stand these are the features stores up to 2000 photos
>> on one MiniDisk
> Assuming the 3.5" floppy capacity is in the ballpark,
> then the camera has to store 2000 images in 1.4MB.
> Hmmm...

I think you are confused about what a MiniDisk really is.  If we are
talking about the same MiniDisks that Sony use in their MiniDisk
players for audio, then the storage capacity is very close to that
of normal CD's, namely 650 Mb.  At least, one MiniDisk can store the
same length of near CD quality sound that you can fit on an ordinary
CD.

> Assuming each image has a resolution of 100 x 150
> (15,000 pixels) x 2 octets/pixel (15 bit color), then
> each image needs 30KB of storage.  2000 images would
> take 600MB of disk storage.

All of which sounds about right, and the MiniDisk should be able to
handle that.

Rgds
Werner
--
Werner Terreblanche     users.iafrica.com/w/we/wernerte/index.htm
KILLspamwterrebKILLspamspamplessey.co.za (work)  OR  RemoveMEwernerteTakeThisOuTspamiafrica.com  (home)
Plessey SA, PO Box 30451,Tokai 7966, Cape Town, South Africa
or at home : Suite 251, PostNet X5061, Stellenbosch, 7599
Tel +27 21 7102251  Fax +27 21 7102886  Home +27 21 8872196
------------------------------------------------------------

1997\07\29@221655 by Peter Wintulich

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The SONY MiniDisk is a ReWritable disk with originally a
raw storage capacity of about 160MB. The audio is highly
compressed using only the dominant frequencies and not
storing the rest.

This refrence has a good amount of info on the MD.
http://www.hip.atr.co.jp/~eaw/minidisc.html

Image compresion in the digital cameras is storing 16 24bit
640x480 pixel photos in 1MB of memory. This means 160MB
could store 2560 photos.

bye for now


'Digital Cameras'
1997\08\01@051811 by Eric Smith
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"Martin R. Green" <spamBeGonemrgreenspamBeGonespamBIGFOOT.COM> wrote:
> The camera in question is a "Mavica", which is a name used by Sony for
> it's digital cameras for at least 15 or 20 years (the first ones were
> very impractical and VERY expensive, with poor quality).  The new

Most (if not all) of the earlier Mavica cameras were not digital.  They
used analog recording.  They predated both the JPEG compression and the
feasibility of putting the computing power necessary for JPEG (or other
image coding algorithms) into a portable device.

I don't think I'd be satisfied with the new Mavica because you can't fit
very many high-quality 640x480 JPEG images onto a 1.44M floppy.  I don't want
to have to carry several boxes of floppies around in order to use my camera.

Personally, I prefer the Sony DSC-F1 camera, which stores JPEG images into
an internal 4 megabyte flash memory, and can download them over IRDA (wireless)
or EIA-232 serial connections.  It's too bad it doesn't use removable flash
memory.  The standard compression setting uses about 60KB per photo, so the
flash holds about 60 photos.  It doesn't have a zoom lens, although it does
have macro.

I'm considering upgrading to a Sony DKC-ID1, which has a higher resolution
CCD, a zoom lens, uses PCMCIA ATA flash cards, and has a SCSI interface.  It
has a camcorder-style color viewfinder instead of the big LCD though, and it
costs much more.

I haven't figured out any ways to get PICs involved in my digital photography
efforts, although I do use the camera to take photos of my PIC projects.

Cheers,
Eric

1997\08\01@070719 by tjaart

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Eric Smith wrote:
>
> "Martin R. Green" <TakeThisOuTmrgreenEraseMEspamspam_OUTBIGFOOT.COM> wrote:
> > The camera in question is a "Mavica", which is a name used by Sony for
> > it's digital cameras for at least 15 or 20 years (the first ones were
> > very impractical and VERY expensive, with poor quality).  The new

Does anybody have an idea what the USD price of the two MAVICA models
are?


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Tjaart van der Walt
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'Digital Cameras'
1997\09\10@212351 by Mroczkowski
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I saw an ad for the Sony Mavica in a catalog # 80S, from Mac Mall, page 45.
The basic unit is $499.99/with X10 zoom $699.99.
I didn't check it out but their web site is at:
http://www.macmall.com

Hank

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