I have a general question about the sharpening knob of VCRs.
What does "softness" and "sharpness" mean?
When I turn the knob to the left and the video softens, is a blurring filter applied? Or is this the picture as it is?
So my question is basically:
blur (left) - unfiltrered (middle) - sharpen (right)
Or is it
normal (left) - sharpen a bit (middle) - sharpen a lot (right)
Thank you for any answer.
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Wow, what a question. My question is "why do you want to know"? I would suggest that either direction applies a filter and that the middle position is unfiltered.
Originally Posted by lordsmurfRecommends: Kiva.org - Loans that change lives.
Basically, a sharpness control is a high frequency gain control for video, similar to a Treble control for audio. Higher gain at high frequencies yields a sharper picture, while a lower gain yields a softer picture.
Many VCRs have sharpness controls. The Panasonic AG-19XX VCRs have a Sharpness slider, where the center detent provides a gain of 1 (no boost or cut) and sliding it left or right decreases or increases the high frequency gain, respectively.Life is better when you focus on the signals instead of the noise.
Originally Posted by lordsmurf
Originally Posted by knn
Realize that if it's hardware you're talking, even if the circuit is only additive or only subtractive, they will probably have moved the end point up or down vs that, so that the 'neutral' would be somewhere near the middle of the adjustment. Also realize that since the circuit is designed to affect the video signal, it may well do so even at its most neutral setting. Due to amplifier and component limitations, it will probably be affecting the video slightly even when you put it to where the overall average is exactly the same as the incoming signal.
It is mainly a visual function. You adjust it to where it looks best for what you want, and be happy with it. If you don't want this and only want an exact copy of the input, don't even put it through something with a 'sharpness' control, only use something that has an exactly flat amplifier or as close as possible. Pretty much same goes for software 'sharpness' as well.
Technically, you could expect a 'sharpen' control to start at neutral and only affect the signal to enhance sharpness, and a 'sharpness' control to swing both ways and have center as neutral. But most people absolutely suck in logic and especially in relating logic to language, and the person putting this label on equipment often has no idea how the circuit was designed etc etc.
Both my Sony SLV-R5UC and Hitachi S730 have sharpness controls which are best left in the center position unless you REALLY know what you are doing....