On Sat, 27 Apr 2002 22:54:32 GMT, d_ruether@hotmail.com (Neuman - Ruether) wrote:

>OK, I think you are right - we are looking at the same thing
>in different ways. To state it a different way: the spatial
>resolution of a single frame with no motion in it will be
>the same for both PS-mode and interlaced mode, *all else
>being equal*; the spatial resolution for a single frame with
>motion in it will be somewhat lower for interlaced vs
>PS-mode (but with the attendant worsening of the temporal
>resolution with multiple frames); in all cases I know of,
>all else is *not* equal, since true 25/30fps at full
>resolution has not been possible in consumer gear, so the
>spatial resolution is also lower in PS-mode compared with
>interlaced in a single frame without motion...

But, then, this...;-)
(The Adam Wilt article did refer to Canon 3-CCD cameras, as
I now recall, and did not cover the one-chippers...)

On Sat, 27 Apr 2002 16:27:32 GMT, lawrence@vex.net (Lawrence Kwan) wrote:
>In article <3cc95089.1696897@newsstand.cit.cornell.edu>,
>Neuman - Ruether wrote:

>>- PS-mode/"frame-mode" operates at 30fps for Canon cameras,
>> 15fps for Sony, but the Canon interpolates fields to get
>> the higher frame rate, reducing spatial resolution (which
>> in any case cannot be greater than it is for interlaced
>> video...);

>This is not true for all Canon camcorders. What you have said only
>applies to Canon 3CCD camcorder such as XL-1; it does not have true
>progressive scan CCDs. However, Canon's single CCD camcorders such as
>Optura, Optura Pi, Elura, Elura2 etc, does have true progressive scan CCD.
>Absolutely no interpolation is used to produce the progressive scan video.

Thanks for this information.