[vdr] Re: Feature request - 16/9 auto-swithing

["karim" <kafifi@nerim.net>]

Be carefull !!!

AFAIK, there is *no* possibility to detect "normal" or "large" signal from a
simple composite connection (ie cinch).

It means that your tv detects a letter box programs from the black zones
above and underneath the image, and then activate an artificial zoom mode.
Please note that it's    completely different than the true 16/9 mode,
because zooming decreases the quality of video : you stretch horizontally
and vertically a small image to fill entire screen, without any more
information ! (Remember that the two  blacks zones doesn't contain any
information and are totally lost).
=> At the end, you are displaying a full screen with no more than about 300
lines...

Keep in mind that true 16/9 gives an *anamorphic* image which is only
horizontally stretched (by the true anamorphic 16/9 mode of the tv). In this
way, the maximum resolution is keeping, ie from about 500 lines. Really more
efficient than a poor zoom !

PS : At this time, there is a true 16/9 anamorphic film on ZDF (Astra).

Bye !
Karim.
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-----Message d'origine-----
De : vdr-bounce@linuxtv.org [mailto:vdr-bounce@linuxtv.org]De la part de
Mario Dilleni
Envoye : samedi 3 janvier 2004 15:57
A : vdr@linuxtv.org
Objet : [vdr] Re: Feature request - 16/9 auto-swithing


At 14:38 03.01.2004, you wrote:

I'm not Klaus;-),
but can tell you that autoswitching works for me. Unfortunately I'm not
sure why, as I've connected my VDR-Box via am AV-Receiver which only has
Cinch connectors. But it definetly works ( sometimes it takes a bit to
switch back from 16:9 to 4:3).

I guess it's afeature of my Philips TV-set

>Hi Klaus,
>
>My vdr box is connected to a 16/9 TV. Unfortunately, here in France, we
have
>*only* two trues 16/9 channels. It means that every time I zap from a
>"normal" to a "wide" channel, I've as well switch manually the tv from
"4/3"
>to "16/9".
>
>I would like to automate this feature. AFAIK, the only way to drive tv mode
>switching, is to connect it through a SCART connector instead of "cinch" or
>"mini-din". In this way, in case of 16/9 program, the source transmit a
>special signal (*) to switch between "normal" and 'wide' modes.
>
>(*) by changing the "commutation lente" pin level from 6V to 12v.
>
>I plan to build a home made SCART connector to add the feature. The
>commutation signal could be fetched from a serial or parallel port,
buffered
>and voltage ajusted, before  driving the SCART through "commutation lente"
>pin.
>
>In VDR version 1.3x, could it be possible that VDR "trig" a serial (or
>parallel) port pin  in case of 16/9 programs ?
>
>If there is another possibility, fell free to tell us ;-)
>
>
>Regards.
>Karim.
>
>
>
>
>
>
>
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