Abstract
Multi-modal aspects of audiovisual quality assessment for interactive communication services are presented in this chapter. The focus is brought on how perceived auditory and visual qualities integrate to form an overall audiovisual quality perception for different experimental contexts. In particular, three main aspects are investigated: first, the influence of the experimental context referring to the mode of assessment (whether the subjects are placed in a one-way listening and viewing setting, or in a two-way interactive situation of assessment) on the audio, video and audiovisual qualities; second, the effects of cross-modal interactions on the assessment of the audio and video qualities are measured for those experimental contexts and confronted to the results found in the literature; third, the impact of the conversational scenario on the assessment of the auditory and visual qualities is investigated. Finally, audiovisual integration functions are proposed for each mode of assessment and conversational scenario that can be used in a general context.
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- 1.
The linear mapping function is defined as follows: \(Q_{new} = (M_{new}-m_{new})\cdot \frac{Q_{old}-m_{old}}{M_{old}-m_{old}}+ m_{new}\), where \(Q_{new}\) and \(Q_{old}\) represent the quality scores on the new and old scales, \(M_{new}\) and \(m_{new}\), the maximal and minimal values on the new scale, and \(M_{old}\) and \(m_{old}\) the maximal and minimal values on the old scale. After mapping, the quality scores exceeding the range [\(M_{new}\), \(m_{new}\)] were clipped.
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© 2015 Springer International Publishing Switzerland
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Belmudez, B. (2015). Audiovisual Integration for Call Quality. In: Audiovisual Quality Assessment and Prediction for Videotelephony. T-Labs Series in Telecommunication Services. Springer, Cham. https://doi.org/10.1007/978-3-319-14166-4_4
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DOI: https://doi.org/10.1007/978-3-319-14166-4_4
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Publisher Name: Springer, Cham
Print ISBN: 978-3-319-14165-7
Online ISBN: 978-3-319-14166-4
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