Posted by R. Mark Clayton on 10/11/06 00:06

"Radium" <glucegen1@excite.com> wrote in message


> VERY IMPORTANT NOTE: While NTSC and PAL use an amplitude-modulated
> carrier for video, SECAM uses FM video.
>
> I really like FM video. Don't know why ;-)
>
> Bob Eld wrote in
> http://groups.google.com/group/sci.electronics.basics/msg/1fe38e9f4f89aa01?hl=en&
> :
>
>> Simple answer: FM is wasteful of bandwidth with other things equal. The
>> video signal needs about 3-1/2Mhz of bandwidh. It would be difficult to
>> get
>> this with FM unless the channel spacing was maybe 10 to 20MHz depending
>> on
>> modulation index.
>
> What if the WMV [Windows Media Video] digital compression is used and
> the color resolution is decrease sufficiently? Its possible to have a
> supreme quality in terms of number of pixels and frame rate. All you
> have to do is compress the WMV's color resolution and you can get a
> bit-rate that is low enough not to hog bandwidth and at the same time,
> the image resolution and frame rate will be that of a first-class video
> signal.
>
>
> Regards,
>
> Radium
>
On my multi-standard set the pecking order of image quality is: -

RGB
S-Video
CVBS
Secam
PAL
NTSC

Comparison was easy - while analog satellite was still in use, I could
receive all three standards as broadcast directly.

Digital broadcasts are all in PAL apart from the very occasional NTSC
(Pentagon TV), however the image is regenerated in the receiver so its
quality could affect the picture.

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