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Posted by Ty Ford on 01/30/06 14:05
On Sun, 29 Jan 2006 13:50:08 -0500, David McCall wrote
(in article <A78Df.1253$ap3.987@trndny03>):
>
> "Martin Heffels" <mitch.mcNeilljn@sprint.ca> wrote in message
> news:ij4ot114ic0kv136msohq4fj1ot941cr02@4ax.com...
>> On Sat, 28 Jan 2006 15:49:14 GMT, "David McCall"
>> <david.mccall@comcast.net>
>> wrote:
>>
>>> Sony's high end offerings are not compressed very much,
>>> but Panasonic's offerings DVCam-100HD and DVCam-50HD
>>> ARE heavily compressed. Do any of these count?
>>
>> Compression has nothing to do with determining whether something is HD or
>> not. The amount of pixels which are being recorded, and shown in the end,
>> determine this: 1920x1080 or 1440x720, 24, 25, 30 or 60 fps interlaced or
>> progressive.
>>
> You see, I wouldn't think compression would have anything
> to do with it either, but I think it is the compression that make
> Ty reject it as an HD format.
That and Spec's particularly abusive style of communication. :)
I'm writing that last post off Spec. I'm going to take it that you were
having a bad day.
But seriously folks....There's a whole nother aspect of the compression game
and that's what happens when you shoot highly compressed anything. Say you
finish your piece, it may get sent to who knows where..maybe a TV station or
satellite uplink. The TV station may have a STL (Studio to Transmitter link)
that uses some form of compression. Maybe the TV station stores everything on
a hard drive and uses some compression there as well. (With storage getting
cheaper, this will be less likely, but it happens now and broadcasters are
known for their economy.)
Now you have a string of different compression algorithms, called concantated
compression. It can look pretty nasty pretty fast.
One in our midst mentioned to me that Sony and Canon HDV are actually
different than JVC. So there's HDV1 and HDV2? What happens if you play a tape
recorded in a JVC HDV camera in a Sony or Canon deck?
Anybody?
Regards,
Ty Ford
-- Ty Ford's equipment reviews, audio samples, rates and other audiocentric
stuff are at www.tyford.com
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