Vectorscope; Yc Waveform - Adobe PREMIERE PRO 2 Manual

ADOBE PREMIERE PRO 2.0
280
User Guide

Vectorscope

The Vectorscope displays a circular chart, similar to a color wheel, that shows the video's chrominance information.
Saturation is measured from the center of the chart outward. Saturated, vivid colors produce a pattern some distance
from the center of the chart, while a black-and-white image produces only a dot at the center of the chart. The
particular color, or hue, of the image determines the direction (angle of the pattern). Small target boxes indicate
where fully saturated magenta, blue, cyan, green, yellow, and red (present in a color bars test pattern) should appear.
In NTSC video, chrominance levels should not exceed these target areas.
A B
Vectorscope
A. Target boxes B. Image profile
The Vectorscope has the following controls:
Adjusts the brightness of the pattern display. It does not affect the video output signal.
Intensity
Displays an approximate representation of the chrominance in the analog signal output.
75%
Displays the chrominance in the digital video signal information.
100%

YC Waveform

The YC Waveform displays a graph showing the signal intensity in the video clip. The horizontal axis of the graph
corresponds to the video image (from left to right) and the vertical axis is the signal intensity in units called IRE
(named for the Institute of Radio Engineers).
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 information.