通訊產品測試環境中背景噪音重建技術之研究

隨著通訊產品的普及，對語音通話品質的要求日益提升，因此通訊產品研發時必須在各種使用環境下測試產品，以滿足消費者需求。但帶著產品及儀器到各種場所做測試，不僅費時、費力且成本也較高，若能在實驗室內模擬出各種環境的背景聲場做產品測試，則能節省開發時間與成本。半無迴響室優點較一般空間穩定且不易受到外界干擾，而一般辦公室環境空間較易取得。為了探討聲場重建技術應用在不同空間的使用限制與範圍，本研究針對聲源位置改變及錄製位置改變且在不同環境下錄製聲場做有系統的實驗測試，觀察原始聲場與重建聲場之差異，目的是為了探討通訊產品在測試時於不同環境中進行背景聲場重建的準確性。

關鍵字

背景噪音；聲場模擬；通訊產品

並列摘要

The demand for the speech quality of communication products is an important issue for product development. The communication products must be tested in different application environments, but it costs lots of time and manpower to test on-site. It will be time and cost-saving to test products in a simulated background noise environment that created in the laboratory. Systematic experiments are carried out in a semi-anechoic room and an office room. The purpose of this research is to study the feasibility of background noise reconstruction in different environments by investigating the influence of sound source position, recording position and equalization position. The aim is to create an accurate background noise test environment for communication products on the R&D stage.

並列關鍵字

Background noise ； Sound field reconstruction ； communication product

參考文獻

[1] ITU-T, "Perceptual evaluation of speech quality(PESQ)," P.862.

[3] S. Brix and T. Sporer," Wellenfeldsynthese – Eine neue Dimension der 3D-Audiowiederabe," FKT, 11/2002, pp. 735-738.

[10] F. A. Firestone," The phase different and amplitude ration at the ears due to a source of pure tones," J. Acoust Soc. Amer. vol. 2, 1930, pp. 260-270.

參考文獻

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[2] J. Hull, "Surround Sound Past, Present, and Future: A history of multichannel audio from mag stripe to dolby digital," Dolby Laboratories Inc.

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通訊產品測試環境中背景噪音重建技術之研究

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