Picture Quality Analysis System — PQA600A

Configure Measure Dialog

Comprehensive Picture Quality Analysis

The PQA600A provides Full Reference (FR) picture quality measurements

that compare the luminance signal of reference and test videos. It also

offers some No Reference (NR) measurements on the luminance signal of

the test video only. Reduced Reference (RR) measurements can be made

manually from differences in No Reference measurements. The suite of

measurements includes:

Critical Viewing (Human Vision System Model-based, Full Reference)

Picture Quality

Casual Viewing (Attention Weighted, Full Reference, or No Reference)

Picture Quality

Peak Signal-to-Noise Ratio (PSNR, Full Reference)

Focus of Attention (Applied to both Full Reference and No Reference

Measurements)

Artifact Detection (Full Reference, except for DC Blockiness)

DC Blockiness (Full Reference and No Reference)

Edit Measure Dialog

The PQA600A supports these measurements through preset and

user-defined combinations of display type, viewing conditions, human

vision response (demographic), focus of attention, and artifact detection,

in addition to the default ITU BT-500 conditions. The ability to configure

measurement conditions helps CODEC designers evaluate design

trade-offs as they optimize for different applications, and helps any

user investigate how different viewing conditions affect picture quality

measurement results. A user-defined measurement is created by modifying

apreconfigured measurement or creating a new one, then saving and

recalling the user-defined measurement from the Configure Measure dialog

menu.

Easy-to-Use Interface

The PQA600A has two modes: Measurement and Review. The

Measurement mode is used to execute the measurement selected in the

Configure Dialog. During measurement execution, the summary data and

map results are displayed on-screen and saved to the system hard disk.

The Review mode is used to view previously saved summary results and

maps created either with the measurement mode or XML script execution.

The user can choose multiple results in this mode and compare each

result side by side using the synchronous display in Tile mode. Comparing

multiple results maps made with the different CODEC parameters and/or

different measurement configurations enables easy investigation of the root

cause of any difference.