Posted by Smarty on 10/26/06 04:11

Thanks for posting this. It is the most comprehensive review of this new
AVCHD camcorder I've seen, but lacks any discussion of motion artifacts and
how the camcorder behaves dynamically. The emphasis of the reviewer on still
(versus moving) image comparisons just does not consider how the new codec
and the MPEG4/H.264 processing impacts the performance versus the HDV (MPEG2
long GOP) approach. Sony's published comparison of HD codecs for BluRay (as
referenced by David Ranada in Sound and Vision Magazine recently) revealed
that a significantly larger percentage of viewers reported visible artifacts
/ defects in the film clips encoded in MPEG4/H.264 when compared to the same
material viewed with MPEG2. Personally, I was not surprised that doubling
the codec's compression had such penalties, having seen my own comparisons
of MPEG2 versus DiVX, Quicktime, WMV and other MPEG4 and H/264 variants.

Despite this single criticism of the camcorder review, I still found it very
enlightening. Thanks again for posting it.

Smarty




<jerry@jonesgroup.net> wrote in message
news:1161820217.978431.34020@i3g2000cwc.googlegroups.com...
> http://tinyurl.com/ydwgnb
>
> At the preceding link, CamcorderInfo.Com reviews the AVCHD/H.264 high
> definition Sony HDR-SR1 HDD (hard disk) camcorder.
>
> This camcorder's bit rate ceiling is 15 (MBPS).
>
> The 8cm DVD HDR-UX1 model's bitrate is constrained to 12.
>
> The AVCHD bit rate ceiling is 24.
>
> So SONY is apparently constraining the bit rate on these first
> generation models.
>
> I suspect it may be to protect Sony's aging HDV "prosumer" camcorders
> from competition.
>
> Jerry Jones
> http://www.jonesgroup.net
>

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