
Perceptual Evaluation of Speech Quality (PESQ)
Reference implementation for ITU-T Recommendations P.862, P.862.1 and P.862.2.
Version 2.0 October 2005.

PESQ Intellectual Property Rights Notice.

DEFINITIONS:
For the purposes of this Intellectual Property Rights Notice the terms
'Perceptual Evaluation of Speech Quality Algorithm' and 'PESQ Algorithm'
refer to the objective speech quality measurement algorithm defined in ITU-T
Recommendation P.862; the term 'PESQ Software' refers to the C-code component
of P.862. These definitions also apply to those parts of ITU-T Recommendation
P.862.2 and its source code that are common with P.862.

NOTICE:
All copyright, trade marks, trade names, patents, know-how and all or any other
intellectual rights subsisting in or used in connection with including all
algorithms, documents and manuals relating to the PESQ Algorithm and or PESQ
Software are and remain the sole property in law, ownership, regulations,
treaties and patent rights of the Owners identified below. The user may not
dispute or question the ownership of the PESQ Algorithm and or PESQ Software.

OWNERS ARE:
1.	British Telecommunications plc (BT), all rights assigned
      to Psytechnics Limited
2.	Royal KPN NV, all rights assigned to OPTICOM GmbH

RESTRICTIONS:
The user cannot:
1.	alter, duplicate, modify, adapt, or translate in whole or in
      part any aspect of the PESQ Algorithm and or PESQ Software
2.	sell, hire, loan, distribute, dispose or put to any commercial
      use other than those permitted below in whole or in part any
      aspect of the PESQ Algorithm and or PESQ Software

PERMITTED USE:
The user may:
1.	Use the PESQ Software to:
      i)   understand the PESQ Algorithm; or
      ii)  evaluate the ability of the PESQ Algorithm to perform its intended
           function of predicting the speech quality of a system; or
      iii) evaluate the computational complexity of the PESQ Algorithm,
           with the limitation that none of said evaluations or its
           results shall be used for external commercial use.
2.	Use the PESQ Software to test if an implementation of the PESQ
      Algorithm conforms to ITU-T Recommendation P.862.
3.	With the prior written permission of both Psytechnics Limited and
      OPTICOM GmbH, use the PESQ Software in accordance with the above
      Restrictions to perform work that meets all of the following criteria:
      i)    the work must contribute directly to the maintenance of an
            existing ITU recommendation or the development of a new ITU
            recommendation under an approved ITU Study Item; and
      ii)   the work and its results must be fully described in a
            written contribution to the ITU that is presented at a formal
            ITU meeting within one year of the start of the work; and
      iii)  neither the work nor its results shall be put to any
            commercial use other than making said contribution to the ITU.
            Said permission will be provided on a case-by-case basis.

ANY OTHER USE OR APPLICATION OF THE PESQ SOFTWARE AND/OR THE PESQ ALGORITHM
WILL REQUIRE A PESQ LICENCE AGREEMENT, WHICH MAY BE OBTAINED FROM EITHER
OPTICOM GMBH OR PSYTECHNICS LIMITED. 

EACH COMPANY OFFERS OEM LICENSE AGREEMENTS, WHICH COMBINE OEM
IMPLEMENTATIONS OF THE PESQ ALGORITHM TOGETHER WITH A PESQ PATENT LICENSE
AGREEMENT. PESQ PATENT-ONLY LICENSE AGREEMENTS MAY BE OBTAINED FROM OPTICOM.

***********************************************************************
*  OPTICOM GmbH                    *  Psytechnics Limited             *
*  Naegelsbachstr. 38,             *  Fraser House, 23 Museum Street, *
*  D- 91052 Erlangen, Germany      *  Ipswich IP1 1HN, England        *
*  Phone: +49 (0) 9131 53020 0     *  Phone: +44 (0) 1473 261 800     *
*  Fax:   +49 (0) 9131 53020 20    *  Fax:   +44 (0) 1473 261 880     *
*  E-mail: info@opticom.de,        *  E-mail: info@psytechnics.com,   *
*  www.opticom.de                  *  www.psytechnics.com             *
***********************************************************************

Reading reference file ref.wav...done.
Reading degraded file test.wav...done.
 Level normalization...
 IRS filtering...
 Variable delay compensation...

 Delays: 479 479 
 Acoustic model processing...

P.862 Prediction (Raw MOS, MOS-LQO):  = 2.688	2.376
