On 25 Jun 2002 14:28:24 GMT, mitchgross@aol.com (MitchGross) wrote:

>As soon as you have info please email me. I talked to a pro video
>salesman at B and H today and he was jumping up and down about the Jvc
>dv300 because ( if you examine the specs at the B and H web site you
>will note that the camera offers 700 lines of resolution! as compared
>to , what? , 520 for the Sony vx 2000 which I am considering buying.
>Samy's camera when I visited their store in Los Angeles were down on
>the product...why, I couldn't detect..They laughed at it..called it
>cheap and were pushing the Canon GL1 which is not the greatest for low
>light and has smaller cdds...so go figure..
[RB]

>>Ummmmmmm...
>>"700 lines" is impossible with the Mini-DV format, as lines
>>are counted in video... (540 [vertical] lines horizontal
>>resolution is the medium maximum, which the VX2000 most
>>closely approaches of the available cameras seen so far
>>[unlike the XL1s, with its noticeably lower resolution]).
[DR]

>Not to get into a huge discussion on this, but it's a measurement of what the
>CCD sensors an 10-bit encoders are capable of, not what the format and codec
>then squeeze it down to. There are higher-end cameras capable of considerably
>more than 700 lines, and these are still for standard def formats.
>Interestingly, the JVC gy-DV500 claims 750 lines while the Panasonic AG-DVC200
>claims 800 lines even though both cameras use the same chip set because they
>clock info through it a little faster.
>
>Basic math of it is the higher resolution the camera is capable of seeing
>equals the higher resolution that ends up recorded to tape. I could get into
>it further but it would no longer be anything resembling "basic math."
[MB]

Yes, I agree - but the answer RB gave was comparing
"apples and oranges": the on-tape resolution of the
VX2000 with the "imager" (take this as the combination
of lens, CCD-capability, and associated electronics)
resolution of the JVC 300... The format limit is 540
lines, but improving the resolution "up-stream" does
in fact improve the final on-tape resolution's "degree
of approximation" of 540 lines - but the 540 lines
(or whatever the actual exact value is) format limit
of D25 is the absolute limit, never to be actually
reached in practice... The poster was claiming that
the JVC 300's 700 lines was an improvement over the
VX2000's 520, but this is false, as presented...