Sony MLS-X1 Users Guide - Page 116
Keys, Overview, Key Fill and Key Source, Key Type
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Keys 6 Chapter Overview A key is a function in which a part of the background image is replaced by inserting an image or superimposed text. The signal used to cut out a portion of the background image (key source), signal to embed in the cutout portion (key fill), and key source processing method (key type) can be selected for a key. The number of keys that can be used on each switcher bank is six when the system signal format is 2160P, and eight when the system signal format is 1080P or 1080i. Notes • When M/E split is enabled, the number of keys that can be used will vary depending on the settings. • When the system signal format is 2160P, two of the six keys available for each switcher bank are restricted keys. These keys are called "additional keys." For details, see "Setting sub block full keys" (page 387). Key Fill and Key Source The key fill signal can be set to a key bus signal or color matte. The key source signal can be selected using the following three modes. Self mode: Use the same signal as the key fill signal. Auto Select mode: Use the signal assigned as a pair with the key fill bus signal on the cross-points. Split mode: Select and use a different signal than the key fill bus pair signal. Key Type The key type sets the manner in which the key source is used to cut out the background. You can select the following key types. Key type Description Luminance key The background is cut out according to the luminance signal of the key source, and at the same time the key fill is also cut out by the key source and then added to the background. Linear key This is a type of luminance key, with a reduced variability in gain allowing more precise adjustment. Chroma key A key signal based on a particular color is used to cut out the background, and the key fill is then inserted. Key wipe pattern A wipe pattern of an independent key key transition is used to cut out the background, and the key fill is then inserted. Clean mode In a luminance key or linear key, you can enable clean mode. When clean mode is enabled, key fill is added to the background without cutting out by the key source. Note When clean mode is enabled, for the parts of the key fill that are not black (excluding the part that is inserted), color is added to the background. 116