Ycbcr parade – Adobe Premiere Pro CS4 User Manual
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USING ADOBE PREMIERE PRO CS4
Monitoring assets
Last updated 11/6/2011
The YC Waveform displays luminance information as a green waveform. Bright objects produce a waveform pattern
(bright green areas) near the top of the graph; darker objects produce a waveform toward the bottom. For NTSC video
in the United States, luminance levels should range from 7.5 to 100 IRE (sometimes referred to as the legal broadcast
limit). Japan’s implementation of NTSC standards permits a luminance range from 0 to 100 IRE. Generally, luminance
and chroma values should be about the same and distributed evenly across the 7.5 to 100 IRE range.
The YC Waveform also displays chrominance information as a blue waveform. The chrominance information is
overlaid upon the luminance waveform.
You can specify whether the YC Waveform displays both luminance and chrominance information, or just luminance
.
YC Waveform with the chroma control enabled
A. IRE units B. Luminance (green) waveform C. Chrominance (blue) waveform D. Range of signal components
The YC Waveform has the following controls:
Intensity
Adjusts the brightness of the waveform display. It does not affect the video output signal.
Setup (7.5 IRE)
Displays a waveform that approximates the final analog video output signal. Deselecting this option
displays the digital video information.
Chroma
Displays both chrominance in addition to luminance information. Deselecting this option displays only the
luminance.
More Help topics
YCbCr Parade
The YCbCr Parade scope displays waveforms representing levels of the luminance and color difference channels in the
video signal. The waveforms appear in a graph one after another.
The Intensity control adjusts the brightness of the waveforms. It does not affect the video output signal.
Note: Cb and Cr are the color difference channels in a digital video signal. Cb is blue minus luma and Cr is red minus
luma. Y represents luma.
C
B
A
D