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Tool for subjective quality evaluation of audiosignals restoration
Černý, Viktor ; Dorazil, Jan (referee) ; Záviška, Pavel (advisor)
Bacherol thesis deals with the theory of audio signal depreciation and reconstruction, with objective tests and subjective methods of reconstructed signal evaluation. At first, there are described several types of depreciation of audio signals and then reconstruction types for their reconstruction. After the reconstruction, types six objective and six subjective tests are mentioned for the evaluation of audio signal quality. The next part of the Bachelor thesis is the description of the program that was implemented in the programming language Java. The program is designed to design MOS, MUSHRA and ABX listening tests as well as to use for the actual testing. At the end of the thesis are the results of the listening tests that were used to test the program and the user ratings of the application.
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Analysis of Speech Masked by Noise in Public Transport Vehicles
Kobližka, Martin ; Zvončák, Vojtěch (referee) ; Jirásek, Ondřej (advisor)
This work deals with the problems of noise and speech masking in public transport . The theoretical is focused on the perception of sound in terms of loudness and frequency. The practical part includes recording noise inside public transport vehicles and determining the loudness and masking thresholds by the Zwicker method using Matlab. Furthermore, speech recording in different dynamics, listening tests and their evaluation in terms of speech intelligibility.
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Comparison of objective metrics for evaluating the quality of audio signals
Landsmann, Adam ; Rajmic, Pavel (referee) ; Záviška, Pavel (advisor)
This bachelor thesis deals with the issue of objective testing of sound quality with a comparison with the subjective type of evaluation. The work describes the phenomena in the interpretation of sound through the human auditory organ, possible types of damage to the audio signal and selected types of both objective and subjective methods for evaluating sound quality. Six metrics are included from each type of testing, three of which are selected for comparison. Subjective listening tests were demonstrated using a web interface in accordance with the selected method. After sufficient data were collected, the results were statistically analyzed using analysis of variance. The final comparison of the results of listening tests with the values of objective metrics was proved by regression and correlation analysis.
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Sound source panning in non-standard speaker topologies
Doležel, Roman ; Balík, Miroslav (referee) ; Orlovský, Kristián (advisor)
This work is aimed to sound source panning in two-dimensional space. The first part describes sound sensation by human auditory organ and spatial hearing. Next aim of the work is to describe commonly used panning methods VBAP and Ambisonics and newly introduced method DBAP, which is the main subject of this work. All methods are explained based on theoretical information. The third part of the work deals with knowledge of the amplitude method DBAP obtained by simulation in Matlab for various speakers topologies. The last section is focused on listening tests for comparison of methods DBAP and VBAP.
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Comparison of objective metrics for evaluating the quality of audio signals
Landsmann, Adam ; Rajmic, Pavel (referee) ; Záviška, Pavel (advisor)
This bachelor thesis deals with the issue of objective testing of sound quality with a comparison with the subjective type of evaluation. The work describes the phenomena in the interpretation of sound through the human auditory organ, possible types of damage to the audio signal and selected types of both objective and subjective methods for evaluating sound quality. Six metrics are included from each type of testing, three of which are selected for comparison. Subjective listening tests were demonstrated using a web interface in accordance with the selected method. After sufficient data were collected, the results were statistically analyzed using analysis of variance. The final comparison of the results of listening tests with the values of objective metrics was proved by regression and correlation analysis.
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|
|
Analysis of Speech Masked by Noise in Public Transport Vehicles
Kobližka, Martin ; Zvončák, Vojtěch (referee) ; Jirásek, Ondřej (advisor)
This work deals with the problems of noise and speech masking in public transport . The theoretical is focused on the perception of sound in terms of loudness and frequency. The practical part includes recording noise inside public transport vehicles and determining the loudness and masking thresholds by the Zwicker method using Matlab. Furthermore, speech recording in different dynamics, listening tests and their evaluation in terms of speech intelligibility.
|
|
|
Tool for subjective quality evaluation of audiosignals restoration
Černý, Viktor ; Dorazil, Jan (referee) ; Záviška, Pavel (advisor)
Bacherol thesis deals with the theory of audio signal depreciation and reconstruction, with objective tests and subjective methods of reconstructed signal evaluation. At first, there are described several types of depreciation of audio signals and then reconstruction types for their reconstruction. After the reconstruction, types six objective and six subjective tests are mentioned for the evaluation of audio signal quality. The next part of the Bachelor thesis is the description of the program that was implemented in the programming language Java. The program is designed to design MOS, MUSHRA and ABX listening tests as well as to use for the actual testing. At the end of the thesis are the results of the listening tests that were used to test the program and the user ratings of the application.
|
|
|
Sound source panning in non-standard speaker topologies
Doležel, Roman ; Balík, Miroslav (referee) ; Orlovský, Kristián (advisor)
This work is aimed to sound source panning in two-dimensional space. The first part describes sound sensation by human auditory organ and spatial hearing. Next aim of the work is to describe commonly used panning methods VBAP and Ambisonics and newly introduced method DBAP, which is the main subject of this work. All methods are explained based on theoretical information. The third part of the work deals with knowledge of the amplitude method DBAP obtained by simulation in Matlab for various speakers topologies. The last section is focused on listening tests for comparison of methods DBAP and VBAP.
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