Panasonic AGDVX100 - DV CAMCORDER Setup - Pagina 16

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Master Ped

In standard analog video the Pedestal is normally set at 7.5 IRE or 7% and

in digital video it is set at 0 IRE or 0%, this is the black reference for the video signal. This

adjustment allows the user to slightly control the pedestal level which is set in the Camera

Setup Menu. This will change the black reference for the video signal and allow for either

slightly rising of the blacks or the crushing of them.

A Iris Level

The automatic iris level controls the iris opening or level of the video auto-

matically based upon Auto mode selection (IRIS) on the side of the camcorder.

Gamma

Gamma correction is applied in the camera to correct for nonlinear light-output

characteristics of the standard TV picture tube. Picture-tube gamma stretches the whites

the whites and stretches the

and compresses the blacks. Camera gamma compresses

blacks

. Camera gamma can be properly set by using logarithmic gray scale charts and a

waveform monitor. Camera gamma must be the reciprocal of picture gamma which is 2.2,

so the camera gamma is usually 0.45.

The DVX100 has four selections for the gamma curve:

Cine-Like This gamma curve gives the video image a cinema like look. Its best to set the

iris about a 1/2 stop lower then standard video settings.

Low This setting allows for a moderate gradient for the low luminance areas. The video

image looks a little sharper due to the change in the gamma curve.

Norm Standard video images are produced.

High This setting allows for a sharp gradient for the low luminance areas, thus the dark ar-

eas are extended to make them appear brighter.

Skin Tone DTL

The "talking head is probably one of the most common shots on televi-

sion. The Skin Tone Detail is used to improve the head shot quality. When skin tone de-

tail is turned on, the facial skin color has its detail reduced smoothing any skin irregularities,

without affecting other areas of the video image.

Matrix

The mixture of the primary colors red, blue and green to produce the many hues in

the visible spectrum can be adjusted. We often have to compensate the colors due to light-

ing conditions.

The DVX100 has three settings:

Norm Used for shooting under halogen lighting in the studio.

FLOU Used for shooting under fluorescent lighting.

Cine-Like Used to produce a richer, cinema like color.