Abstract:
The purpose of this handbook is to provide a user’s manual for the in-service video quality metric (IVQM) tool.
IVQM performs automated processing of live video signals. This program runs under the Windows XP® operating
system on two PCs communicating through an IP connection. IVQM performs image acquisition, temporal registration,
other video calibration (spatial registration, spatial scaling, valid region, and gain/level offset), and video
quality estimation.
IVQM compares the source video sequence to the destination video sequence (i.e., as output by the video system
under test). Each program alternates between video capture and video analysis. Every source/destination video
sequence pair is processed through three main steps. First, the sequences are buffered onto a hard drive.
Second, the sequences are temporally registered. Third, the video quality of the destination video sequence is
estimated. Quality estimates are reported on a scale of zero to one, where zero means that no impairment is
visible and one means that the video clip has reached the maximum impairment level. Some video sequences may
also be used to estimate other calibration values (spatial registration, spatial scaling, valid region estimation,
and gain/level offset). The user has control over how often these other calibration values are calculated.
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