JVC KM-H3000U, KM-H2500U, KM-H3000E, KM-H2500E manual Chroma Key Fine Tuning

To modify a mask:

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To modify the clip or gain:

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1.Select the key you wish to modify.

2.If necessary, press KEY 1, KEY 2, or KEY 3 to include the key in the next transition and have it display on the Preview monitor.

3.Press NEXT until Mask is displayed.

4.Use the Mask knob to select the mask source. You can choose from the following:

•Off — This is the default setting.

•Box — This creates a box mask.

•Pattrn — This creates a pattern mask.

5.Press the M-Frceknob to force the area inside the mask region to the foreground. Press again to return the mask to normal.

6.Press the M-Invknob to invert the mask. Press again to return the mask to normal.

Note:

•The wash pattern and the key pattern mask are shared. Any adjustments affect both patterns.

For More Information on...

•selecting keys, refer to the section “Selecting Keys” on page 19.

Modifying Other Attributes

There are a number of other attributes you can modify to change the mask appearance. Press NEXT and use the knobs to access and change other attributes.

Modifying Clip and Gain for Unshaped Auto-Select Keys

If an Auto-Select key is unshaped, you can also modify clip and gain.

The Clip function adjusts the threshold level of the key. Only areas of the source video that are higher than the setting of the threshold cut a hole in the background video.

Increasing Gain causes the color to become increasingly saturated.

1.Select the key you wish to modify.

2.If necessary, press KEY 1, KEY 2, or KEY 3 to include the key in the next transition and have it display on the Preview monitor.

3.Rotate the Clip and Gain knobs until the desired effect is achieved.

For More Information on...

•selecting keys, refer to the section “Selecting Keys” on page 19.

Converting Between Shaped and Unshaped Auto-Select Keys

You can convert an unshaped Auto-Select Key to a shaped Auto-Select Key by using the Make Linear function. This defaults any modifiers to the selected key.

To convert an unshaped Auto-Select Key to shaped:

1.Press MENU.

2.Press NEXT until Make Linear is displayed.

3.Press the Make Linear knob.

Chroma Key Fine Tuning

You can control aspects of the Chroma Key using the Chroma Key menus. The following effects can be adjusted:

•Edge

•Shadow

•Gain

•Spill

Chroma key adjustments are persistent and are not affected by a soft reset or switcher reboot. However, initializing the Chroma or performing a factory reset returns all adjustments to default values.

Using the Edge, Shadow, Gain and Spill Effects

The Edge effect controls the sharpness of the key edge.

The Shadow effect allows you to include or removed any shadows that are cast on the Chroma Key background.

The Gain effect controls color saturation. Increasing the Gain causes the video signal colors to become

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