Beyond "Basic Audio Quality" : Characterizing the Perceptual Effects Introduced by Low Bit Rate Spatial Audio Codecs

Paulo Marins

ISBN 10: 3843352267 / ISBN 13: 9783843352260

Published by LAP LAMBERT Academic Publishing, 2010

About this Item

nach der Bestellung gedruckt Neuware - Printed after ordering - The main aim of this work was to characterize the perceptual effects introduced by low bit rate spatial audio codecs. The existing methodologies used to assess the performance of spatial audio codecs were reviewed and it was found that spatial audio coding systems have been evaluated using one perceptual attribute basic audio quality (BAQ). This approach, although effective in terms of the assessment of the overall performance of codecs, does not quantify the contribution of typical codec distortions to the perceived BAQ of the codecs or allow for the identification of independent perceptual attributes that describe the artefacts introduced by spatial audio coding systems. A series of experiments was carried out aiming to characterize the perceptual effects introduced by low bit rate spatial audio codecs. It was found that impairments related to timbral features of the sound are the ones that affect the most the perceived basic audio quality of the codecs. Furthermore, four independent perceptual attributes were uncovered providing a description of the perceptual effects introduced by low bit rate spatial audio codecs.

Seller Inventory # 9783843352260

Bibliographic Details

• Title: Beyond "Basic Audio Quality" : Characterizing the Perceptual Effects Introduced by Low Bit Rate Spatial Audio Codecs
• Publisher: LAP LAMBERT Academic Publishing
• Publication Date: 2010
• Language: English
• ISBN 10: 3843352267
• ISBN 13: 9783843352260
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 220W x 150H x 17D millimeters 220 millimeters width by 150 millimeters height by 17 millimeters depth
• Weight: 429 grams

About this title

Synopsis

The main aim of this work was to characterize the perceptual effects introduced by low bit rate spatial audio codecs. The existing methodologies used to assess the performance of spatial audio codecs were reviewed and it was found that spatial audio coding systems have been evaluated using one perceptual attribute ? basic audio quality (BAQ). This approach, although effective in terms of the assessment of the overall performance of codecs, does not quantify the contribution of typical codec distortions to the perceived BAQ of the codecs or allow for the identification of independent perceptual attributes that describe the artefacts introduced by spatial audio coding systems. A series of experiments was carried out aiming to characterize the perceptual effects introduced by low bit rate spatial audio codecs. It was found that impairments related to timbral features of the sound are the ones that affect the most the perceived basic audio quality of the codecs. Furthermore, four independent perceptual attributes were uncovered providing a description of the perceptual effects introduced by low bit rate spatial audio codecs.

About the Author

Senior Lecturer in the Department of Music at Universidade de Brasília - Brazil. Dr. Marins holds a Ph.D from University of Surrey - UK, a Masters degree from Indiana University - USA and a Bachelor of Arts degree from Universidade de Brasília - Brazil. E-mail: marins@unb.br.