Institute for Telecommunication Sciences / Resources / Video Quality Research / Standards /
Peak Signal-to-Noise Ratio (PSNR) Standards
PSNR is an obvious extention to a long standing engineering
measurement, Signal-to-Noise (SNR).
"Objective Video Quality Measurement
Using a Peak-Signal-to-Noise-Ratio (PSNR) Full Reference
This is not a
standard, but rather a technical report (TR) issued by Committee T1
- Telecommunications, Alliance for
Telecommunications Industry Solutions (ATIS). This TR describes
what arguably is the "clasical" PSNR measurement, where calibration
must be perfect but is not specified (i.e., left up to the
implementor), and PSNR is calculated using only the luma
"Reference algorithm for computing
peak signal to noise ratio of a processed video sequence with
compensation for constant spatial shifts, constant temporal shift,
and constant luminance gain and offset "
To address PSNR's calibration
problems, ITS developped an exhaustive search calibration version
Ratio (PSNR). This version of PSNR is used by the Video Quality Experts Group (VQEG)
as a baseline measurement, when analyzing the accuracy of proposed
metrics. This version of PSNR is included in the ITU-T
Both versions of PSNR are availble for free in the ITS VQM software.