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Posted by Rick Merrill on 05/20/07 17:18
Maxwell wrote:
> On May 14, 10:50 pm, Frank <f...@nojunkmail.humanvalues.net> wrote:
>> Well, alright, let me say this: I do think that the subject line of
>> this thread is a bit off-base. As things presently stand, the
>> highest-priced AVCHD camcorder doesn't provide audio or video quality
>> even matching, let alone exceeding, that of even the lowest-priced HDV
>> camcorder.
>>
>
>
> HDV is MPEG-2.
>
> AVCHD is a variation of MPEG-4 (H-264 actually).
>
> The benefit of MPEG-4 is that it reduces the dataflow considerably.
> It does that by increasing compression. In my opinion, the more you
> compress, the more you sacrifice. For me, MPEG-2 (HDV) is too
> compressed. I wouldn't even touch MPEG-4. All my cameras are HDV.
> AVCHD is for the family vacation.
>
Unlike JPEG compression, MPEG compression also works in the time
dimension: in other words pieces of the screen that don't change for
a while are compressed, so shots that change slowly don't HAVE to be
lossy, YMMV.
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