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Posted by doc on 02/15/06 00:30
IMO, that's the sum of the Sony problem. specialized formats and
configuration. the result "a box" like apple/mac solutions.
drd
"Frank" <frank@nojunkmail.humanvalues.net> wrote in message
news:v44ms11cc06or3o6h1qm3uotp9453pni00@4ax.com...
> On Sun, 15 Jan 2006 23:39:47 GMT, in 'rec.video.production',
> in article <Re: How much space does an hour of HD take up?>,
> "PTravel" <ptravel@travelersvideo.com> wrote:
>
>>> HDV video is always MPEG-2 CBR (constant bit rate).
>>
>>I didn't know that, thanks.
>
> That's because you didn't read my Web page. :)
>
>>> HDV comes,
>>> however, in two flavors, 720p and 1080i. The 720p flavor of HDV is
>>> written at an approximate 19.7 Mbps data rate. The 1080i flavor of HDV
>>> is written at an approximate 25 Mbps data rate, the same as DV
>>> (including Sony's DVCAM and Panasonic's DVCPRO variants of DV).
>
>>Interesting that 720p HDV actually has a lower bit rate than DV-25.
>
> Less data (after lossy compression, that is) = lower data rate.
>
>>> In contrast, Panasonic's DVCPRO HD flavor of HD, which is usually
>>> stored in the form of an .mxf file, has a data rate of approximately
>>> 100 Mbps, so its storage requirements would be approximately four
>>> times that of DV, DVCAM, DVCPRO, or 1080i HDV content with the same
>>> running time. The storage requirements for Sony's HDCAM and HDCAM SR
>>> formats, owing to their much higher data rates, would be even greater.
>>> The data transfer rate of an HD-SDI link, by the way, is in excess of
>>> 1 Gbps, just to put this in perspective.
>>
>>Do you think HDCAM will be supported in any prosumer machines? I was
>>under
>>the impression that Sony was drawing a clear dividing line between HDV,
>>which will be an amateur/prosumer format, and HDCAM which, much like
>>DVCAM,
>>will be for higher end pro units.
>
> I do indeed believe that a dividing line has been drawn (Sony needs to
> protect the HDCAM and HDCAM SR product lines while simultaneously
> offering XDCAM gear and promoting HDV), but I also wouldn't be too
> surprised if Sony didn't come out with both HDV camcorders and HDV
> VCRs with more professionally-oriented features. Look what they did
> with DV in terms of DVCAM. The DSR-2000, for example, sells for about
> U.S. $12,000, which doesn't exactly make it an amateur/prosumer
> product.
>
> What I wonder about is whether Ikegami plans to get into the high-end
> HDV market.
>
> --
> Frank, Independent Consultant, New York, NY
> [Please remove 'nojunkmail.' from address to reply via e-mail.]
> Read Frank's thoughts on HDV at http://www.humanvalues.net/hdv/
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