The P.808 Toolkit is a software package that enables users to run subjective speech quality assessment test in Amazon Mechanical Turk (AMT) crowdsourcing platform, according to the ITU-T Recommendation P.808. It includes following test methods:

• Absolute Category Rating (ACR) -- Annex A, P.808
• Degradation Category Ratings (DCR) -- Annex B, P.808
• Comparison Category Ratings (CCR) -- Annex C, P.808
• Evaluating the subjective quality of speech in noise (i.e. implementation of ITU-T Rec. P.835 approach in crowdsourcing) -- Annex D, P.808

It also extends P.808 in the following ways:

• Includes implementation of the ITU-T Rec. P.831 for the crowdsourcing approach is also provided based on the recommendations given in the ITU-T Rec. P.808.

• NEW - Multi-dimensional Speech Quality Assessment - Following the ITU-T Rec. P.804 and extending it with reverberation, signal and overall quality.

• NEW - Extending P.835 test to evaluate personalized noise suppression

Relevant ITU-T Recommendations are :

• ITU-T Recommendation P.808, Subjective evaluation of speech quality with a crowdsourcing approach. Geneva: International Telecommunication Union, 2021.

• ITU-T Recommendation P.835, Subjective test methodology for evaluating speech communication systems that include noise suppression algorithm. Geneva: International Telecommunication Union, 2003.

• ITU-T Recommendation P.831 Subjective performance evaluation of network echo cancellers. Geneva: International Telecommunication Union, 1998.

• ITU-T Recommendation P.804 Subjective diagnostic test method for conversational speech quality analysis Geneva: International Telecommunication Union, 2017.

Technical description of the implementation and validation are given in these papers:

• An Open Source Implementation of ITU-T Recommendation P.808 with Validation. Babak Naderi, Ross Cutler, INTERSPEECH 2020.

• Crowdsourcing approach for subjective evaluation of echo impairment. Ross Cutler, Babak Naderi, Markus Loide, Sten Sootla, Ando Saabas, ICASSP 2021.

• Subjective Evaluation of Noise Suppression Algorithms in Crowdsourcing Babak Naderi, Ross Cutler, INTERSPEECH 2021.

• Multi-dimensional Speech Quality Assessment in Crowdsourcing. Babak Naderi, Ross Cutler, Nicolae-Catalin Ristea.

If you use this tool in your research please cite it with the following references:

@inproceedings{naderi2020,
  title={An Open source Implementation of ITU-T Recommendation P.808 with Validation},
  author={Naderi, Babak and Cutler, Ross},
  booktitle={Proc. INTERSPEECH},
  year={2020}
}

@inproceedings{cutler2021crowdsourcing,
  title={Crowdsourcing approach for subjective evaluation of echo impairment},
  author={Cutler, Ross and Naderi, Babak and Loide, Markus and Sootla, Sten and Saabas, Ando},
  booktitle={ICASSP 2021-2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
  pages={406--410},
  year={2021},
  organization={IEEE}
}

@inproceedings{naderi2021,
  title={Subjective Evaluation of Noise Suppression Algorithms in Crowdsourcing},
  author={Naderi, Babak and Cutler, Ross},
  booktitle={Proc. INTERSPEECH},
  year={2021}
}

@inproceedings{naderi2024multi,
  title={Multi-dimensional speech quality assessment in crowdsourcing},
  author={Naderi, Babak and Cutler, Ross and Ristea, Nicolae-C{\u{a}}t{\u{a}}lin},
  booktitle={ICASSP 2024-2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
  pages={696--700},
  year={2024},
  organization={IEEE}
}

• Preparation
• Running the Test on Amazon Mechanical Turk
• Analyzing Data

An update with support for multi-dimensional quality assessment is published.

For bug reports and issues with this code, please see the github issues page. Please review this page before contacting the authors.

Contact Babak Naderi, Vishak Gopal or Ross Cutler with any questions.

MIT License

Copyright 2019 (c) Microsoft Corporation.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

The datasets are provided under the original terms that Microsoft received such datasets. See below for more information about each dataset.

The datasets used in this project are licensed as follows:

• Following clips are created under CC BY 4.0 license:
  • src/P808Template/assets/clips/math/*
  • src/P808Template/assets/clips/hearing_test/*
  • src/trapping/messages/*
• Following clips are taken from PTDB-TUG: Pitch Tracking Database from Graz University of Technology; License: http://opendatacommons.org/licenses/odbl/1.0/
  • src/environment test/script/clips/*
  • src/P808Template/assets/clips/signal_level.wav
• Following clips are taken from Noisy speech database for training speech enhancement algorithms and TTS models
  • p835_reference_conditions/source/NSD/*
• Following clips are taken from NOIZEUS
  • p835_reference_conditions/source/noizeus_ref/*
• Following clips are created by adding noise (or other degradation) to above-mentioned clips; License CC BY 4.0
  • src/environment test/script/clips_snr/*
  • src/environment test/assets/jnd_noise/*
  • src/P808Template/assets/clips/environment_test/*
  • src/trapping/source/*
  • p835_reference_conditions/trapping clips/*
  • p835_reference_conditions/degraded_*/*
• Following clips are created by degrading the source signals from ITU-T Rec. P.501; License of source signals
  • p835_reference_conditions/3gpp_p501_FB/*

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This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.