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OPTICOM PEVQ Manual

Advanced perceptual evaluation of video quality
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PEVQ™
ADVANCED PERCEPTUAL
EVALUATION OF
VIDEO QUALITY
OPTICOM GmbH
Naegelsbachstrasse 38
91052 Erlangen
GERMANY
Phone: +49 9131 / 53 020 0
Fax:
+49 9131 / 53 020 20
EMail: info@opticom.de
Website: www.opticom.de
Further information:
www.pevq.org
www.peaq.org
www.pesq.org
www.3sqm.org
www.psqm.org
White Paper by OPTICOM GmbH, Germany
PEVQ™, 3SQM™ and the OPTICOM logo are registered trademarks of OPTICOM GmbH; OPERA, the 'single-sided speech quality measure' and 'the perceptual
quality experts' are trademarks of OPTICOM GmbH. All other product names are trademarks of their respective holders.
© OPTICOM GmbH, Erlangen, GERMANY, 2005 - www.opticom.de

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Summary of Contents for OPTICOM PEVQ

  • Page 1 White Paper by OPTICOM GmbH, Germany PEVQ™, 3SQM™ and the OPTICOM logo are registered trademarks of OPTICOM GmbH; OPERA, the ‘single-sided speech quality measure’ and ‘the perceptual quality experts’ are trademarks of OPTICOM GmbH. All other product names are trademarks of their respective holders.

  • Page 2: Table Of Contents

    IMITATIONS OF 6.4 P PEVQ ..........................10 ERFORMANCE OF 6.5 KPI PEVQ ........................10 BTAINED FROM 6.5.1 PEVQ Score............................10 6.5.2 Delay..............................10 6.5.3 Brightness............................10 6.5.4 Contrast ............................10 6.5.5 PSNR..............................10 6.5.6 Distortion Indicators......................... 10 7 PRODUCT AVAILABILITY ..........................11 7.1 S...

  • Page 3: Executive Summary

    PEVQ is one of the promising models proposed for standardization. Results from standardization work are however not expected before the course of 2006. Of course, OPTICOM will take every means to ensure that PEVQ will continuously be kept up-to-date to incorporate the latest developments of this ongoing standardization work.

  • Page 4: The Need For Quality Testing

    A D V A N C E D P E R C E P T U A L E V A L U A T I O N V I D E O Q U A L I T Y 3 THE NEED FOR QUALITY TESTING The need for testing the perceived quality of video information after transmission and decoding is a key element to...
  • Page 5 A D V A N C E D P E R C E P T U A L E V A L U A T I O N V I D E O Q U A L I T Y In Figure 3-2 a single frame from the decoded signal was taken –...

  • Page 6: Subjective Testing

    Q U A L I T Y 4 SUBJECTIVE TESTING The motivation for the development of objective models like PESQ, 3SQM and PEVQ is that they deliver quickly repeatable results with only a simple test setup for a much lower price than subjective tests. Subjective tests require a number of test persons, which have to listen to an audio file or watch a video sequence, while they have to score them.

  • Page 7: Intrusive Testing

    A D V A N C E D P E R C E P T U A L E V A L U A T I O N V I D E O Q U A L I T Y 5 INTRUSIVE TESTING Intrusive test methods insert a reference signal into the device under test (DUT) (near end side) while the...

  • Page 8: Perceptual Evaluation Of Video Quality

    VQEG and the ITU-T. It must be noted that PEVQ is still in a very preliminary state and may therefore be subject to future improvements. 6.1 Structure of the PEVQ Algorithm...

  • Page 9: Supported File Formats

    6.3 Features and Limitations of PEVQ Currently there are no known limitations of PEVQ. But due to the early stage of the development, it is assumed that the prediction accuracy will continuously be improved.

  • Page 10: Performance Of Pevq

    The PEVQ Score is the most important result and specifies the video quality on a MOS scale. The scale ranges from 1 for very bad quality to 5 for excellent quality. Please note that unlike the MOS scale, the PEVQ Score is not limited to the lower end of 1.0.

  • Page 11: Product Availability

    Q U A L I T Y 7 PRODUCT AVAILABILITY As the standardization is still ongoing but the need for video quality testing algorithms is at hand, OPTICOM is pleased to offer OPTICOM’s new version for video quality testing in the first quarter of 2005.

  • Page 12: About Opticom

    Through many international contacts and cooperation with leading research organizations, OPTICOM has today gained an active role in the international standardization business, e.g. of the new ITU-R standard PEAQ. OPTICOM is also continuously active in, or observing the work of the AES, EBU, ITU-T, ETSI, ISO/MPEG, VQEG and others.

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