[mythtv-users] HDTV on Myth -- is it a "myth?"
Doug Larrick
doug at ties.org
Mon Oct 11 11:41:53 UTC 2004
Joe Barnhart wrote:
> --- Doug Larrick <doug at ties.org> wrote:
>
>
>>Joe Barnhart wrote:
>>
>>>Hmm.. Doesn't something seem fundamentally wrong
>>
>>about
>>
>>>this? Why should 1920x540 look the same as
>>
>>1920x1080?
>>
>>1080i at 30 Hz is identically the same as 540p at 60
>>Hz. Suggest you do
>>some reading.
>
>
> What is the same, Doug? The horizontal scanning
> frequency of 33.75kHz? I agree. How about the image?
> With 1080i you get two different frames of
> information, 30 times each second. With 540p you get
> two identical frames 30 times each second. Shouldn't
> they look different? I think they should.
No.
1080i = 2 fields of 540 lines, at 30 Hz
540p = 1 frame of 540 lines, at 60 Hz.
Six of one, half a dozen of the other. Almost literally.
-Doug
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 256 bytes
Desc: OpenPGP digital signature
Url : http://mythtv.org/pipermail/mythtv-users/attachments/20041011/f71d5675/signature-0001.pgp
More information about the mythtv-users
mailing list