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This paper describes listening tests investigating the audibility of various filters applied in high-resolution wideband digital playback systems. Discrimination between filtered and unfiltered signals was compared directly in the same subjects using a double-blind psychophysical test. Filter responses tested were representative of anti-alias filters used in A/D (analog-to-digital) converters or mastering processes. Further tests probed the audibility of 16-bit quantization with or without a rectangular dither. Results suggest that listeners are sensitive to the small signal alterations introduced by these filters and quantization. Two main conclusions are offered: first, there exist audible signals that cannot be encoded transparently by a standard CD; and second, an audio chain used for such experiments must be capable of high-fidelity reproduction.
Author (s): Jackson, Helen M.; Capp, Michael D.; Stuart, J. Robert
Affiliation:
Meridian Audio Ltd., Huntingdon, UK
(See document for exact affiliation information.)
AES Convention: 137
Paper Number:9174
Publication Date:
2014-10-06
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Session subject:
Perception
Permalink: https://aes2.org/publications/elibrary-page/?id=17497
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Jackson, Helen M.; Capp, Michael D.; Stuart, J. Robert; 2014; The Audibility of Typical Digital Audio Filters in a High-Fidelity Playback System [PDF]; Meridian Audio Ltd., Huntingdon, UK; Paper 9174; Available from: https://aes2.org/publications/elibrary-page/?id=17497
Jackson, Helen M.; Capp, Michael D.; Stuart, J. Robert; The Audibility of Typical Digital Audio Filters in a High-Fidelity Playback System [PDF]; Meridian Audio Ltd., Huntingdon, UK; Paper 9174; 2014 Available: https://aes2.org/publications/elibrary-page/?id=17497