NDLI: A general perceptual tool for evaluation of audio codecs

Content Provider	IEEE Xplore Digital Library
Author	Umapathy, Karthikeyan Krishnan, Sridhar Garabet Sinanian
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, Ont., Canada (Karthikeyan Umapathy)
Abstract	Subjective evaluation forms an important part of any research work, where the feedback and perception of general public or a trained set of specialists are mandatory. Many audio and video coding techniques have emerged to tackle the bandwidth problems imposed by the Internet with data compression schemes either with lossless or perceptually lossless quality. In order to evaluate the performance of these techniques a Mean Opinion Score (MOS) test has to be performed with wide variety of subjects. In this paper we present a MOS tool developed to evaluate the audio codecs both in controlled and uncontrolled listening environments. The technique is based on the international telecommunication union - radiocommunication sector (ITU-R) standard. This novel approach of performing distributed listening tests in uncontrolled environments will help researchers to collect substantial feedback and perform statistical analysis of an audio codec's performance in an efficient manner particularly for Internet driven applications. Results of perceptual evaluation of 8 sample audio files of different varieties with an adaptive time-frequency transform (ATFT) audio codec indicates the ease, independency, and the effectiveness of performing MOS studies with the proposed technique.
Starting Page	683
Ending Page	686
File Size	324658
Page Count	4
File Format	PDF
ISBN	0780377818
ISSN	08407789
DOI	10.1109/CCECE.2003.1225987
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-04
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Codecs Performance evaluation Feedback Internet Testing Video coding Bandwidth Data compression Telecommunication control Telecommunication standards
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Hardware and Architecture

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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