Variable Ratio Sample Rate Conversion Based on Fractional Delay Filter

• Autorzy: Blok M. , Drózda P.

Identyfikatory

DOI

10.2478/aoa-2014-0027

• Języki publikacji: EN

Abstrakty

EN

In this paper a sample rate conversion algorithm which allows for continuously changing resampling ratio has been presented. The proposed implementation is based on a variable fractional delay filter which is implemented by means of a Farrow structure. Coefficients of this structure are computed on the basis of fractional delay filters which are designed using the offset window method. The proposed approach allows us to freely change the instantaneous resampling ratio during processing. Using such an algorithm we can simulate recording of audio on magnetic tape with nonuniform velocity as well as remove such distortions. We have demonstrated capabilities of the proposed approach based on the example of speech signal processing with a resampling ratio which was computed on the basis of estimated fundamental frequency of voiced speech segments.

Słowa kluczowe

EN

sample rate conversion; offset window method; variable fractional delay filter; variable resampling ratio

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2014
• Tom: Vol. 39, No. 2
• Strony: 231--242
• Opis fizyczny: Bibliogr. 23 poz., rys., wykr.

Twórcy

autor

Blok M.

• Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology G. Narutowicza 11/12, 80-233 Gdańsk, Poland

autor

Drózda P.

• ADVA Optical Networking Sp. z o.o. Śląska 35/37, 81-310 Gdynia, Poland

Bibliografia

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