– 72 –Chapter 5 Basic Operations — USK (Upstream key)Adjusting the luminance key/linear keyAdjust the luminance key and linear key definition.1 Select the button → [UP STREAM KEYER] → [USK1] to [USK4] tabs.2 Set [Clip], [Gain], and [Density] in the [Key Adjust] column.[Clip] Sets the reference level for creating key signals.[Gain] Sets the key amplitude.[Density] Sets the key density.3 Select an item in [Invert] in the [Key Adjust] column.[Off] Does not invert the key signals generated internally.[On] Inverts the key signals generated internally.Masking the USKMask the key signals using the mask signal of the box pattern. The following figure is the status when [Type] is set to [ForeGround], and [Invert] is set to[Off].Area where the key signal is effectiveVideo signal rangeArea masked[Right][Left][Top][Bottom][50][25][0][−25][−50][−25][−50] [25][0] [50]1 Select the button → [UP STREAM KEYER] → [USK1] to [USK4] tabs.2 Select an item in [Mask] in the [Mask] column.f Set the mask method.[Off] Does not mask the key signals.[4:3] Masks the signals in the 4:3 aspect ratio.[Manual] Masks the area set in [Adjust1] or [Adjust2].3 Select an item in [Type] in the [Mask] column.f Set the image to be masked.[Foreground] Masks the foreground and displays the background.[Background] Masks the background and displays the foreground.4 Select an item in [Invert] in the [Invert] column.[Off] Does not invert the mask signal.[On] Inverts the mask signal.5 Set [Left], [Top], [Right], and [Bottom] in the [Adjust1]/[Adjust2] column.f Set the area to be masked. The [Left] setting cannot exceed the [Right] setting (and vice versa), and the [Top] setting cannot exceed the [Bottom]setting (and vice versa).[Left] Masks the key left position.[Top] Masks the key top position.[Right] Masks the key right position.[Bottom] Masks the key bottom position.
