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Lossless Coding of Speech from Microphone Array
Myška, David ; Černocký, Jan (referee) ; Malenovský, Vladimír (advisor)
This bachelor's thesis deals with lossless coding of speech signals from microphone arrays. It describes the methods used in the FLAC reference codec and their variations to increase compression for signals from microphone arrays. The following describes methods for aligning channels for their subsequent processing. At the end of the work the results obtained are compared with the reference codec FLAC.
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Acoustic Detection of Speaker Position Using Microphone Array
Horázný, František ; Mošner, Ladislav (referee) ; Szőke, Igor (advisor)
This thesis describes the problem of determining the approximate position of a sound source in a coordinate system needed using the microphone field. It covers all possible variables influencing the detection of the sound source and explains the basic methods which can be used to determine the origin of the sound. The solution proposed in this thesis is to use synchronized static recordings and further modifications for running the program in real-time on the provided ARM/SHARC system, which has limited performance. This thesis contains also tests of the individual components and their parameters. The effect of changing these parameters on the behavior of the system is also shown in this thesis. Additionally, the developed application is used to perform the experiments demonstrating the shift of results during computation without any limitations and when running on the sound system. It also shows experiments with the resulting application, how the results change when calculating without performance limitation and when running on a sound card. Finally, this thesis gives several recommendations and assumptions on how to improve the results when using the program and how to eliminate several system limitations in unfavorable conditions.
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Acoustic Detection of Speaker Position Using Microphone Array
Horázný, František ; Mošner, Ladislav (referee) ; Szőke, Igor (advisor)
This thesis describes the problem of determining the approximate position of a sound source in a coordinate system needed using the microphone field. It covers all possible variables influencing the detection of the sound source and explains the basic methods which can be used to determine the origin of the sound. The solution proposed in this thesis is to use synchronized static recordings and further modifications for running the program in real-time on the provided ARM/SHARC system, which has limited performance. This thesis contains also tests of the individual components and their parameters. The effect of changing these parameters on the behavior of the system is also shown in this thesis. Additionally, the developed application is used to perform the experiments demonstrating the shift of results during computation without any limitations and when running on the sound system. It also shows experiments with the resulting application, how the results change when calculating without performance limitation and when running on a sound card. Finally, this thesis gives several recommendations and assumptions on how to improve the results when using the program and how to eliminate several system limitations in unfavorable conditions.
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Lossless Coding of Speech from Microphone Array
Myška, David ; Černocký, Jan (referee) ; Malenovský, Vladimír (advisor)
This bachelor's thesis deals with lossless coding of speech signals from microphone arrays. It describes the methods used in the FLAC reference codec and their variations to increase compression for signals from microphone arrays. The following describes methods for aligning channels for their subsequent processing. At the end of the work the results obtained are compared with the reference codec FLAC.
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