Tactile Signal Derivation Part 1: Evaluation of Bandwidth Extension Methods

Stanhope E, Oxnard SG, Hobden LJ. Tactile Signal Derivation Part 1: Evaluation of Bandwidth Extension Methods. In: AES Convention 154. Audio Engineering Society; 2023. Paper 73. Available from: https://aes.org/publications/elibrary-page/?id=22098

@inproceedings{Stanhope2023_22098,
  author = {Stanhope, Ethan and Oxnard, Stephen G. and Hobden, Laurence J.},
  title = {{Tactile Signal Derivation Part 1: Evaluation of Bandwidth Extension Methods}},
  booktitle = {AES Convention 154},
  note = {Paper 73},
  year = {2023},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=22098}
}

TY  - CPAPER
TI  - Tactile Signal Derivation Part 1: Evaluation of Bandwidth Extension Methods
AU  - Stanhope, Ethan
AU  - Oxnard, Stephen G.
AU  - Hobden, Laurence J.
T2  - AES Convention 154
M1  - Paper 73
PY  - 2023
DA  - 2023/05/06
UR  - https://aes.org/publications/elibrary-page/?id=22098
PB  - Audio Engineering Society
LA  - en
AB  - The reception of sound commonly consists of significant tactile sensations in combination with auditory phenomena. This is particularly evident in the reception of high sound pressure level events. The use of tactile sensations, referred to as “haptics”, is becoming increasingly commonplace in entertainment systems particularly within cinema, video gaming, automotive and virtual reality industries. However, the vast majority of audio content formats do not feature dedicated haptic signals and, therefore, such signals must be derived from the original content, with particular attention to the parameters of timing, intensity, and frequency. This work focuses on the parameters of frequency and intensity and assesses the performance of three approaches to bandwidth extension. The lower frequency ranges of traditional audio signals vary in magnitude relative to the broadband response. To ensure a haptic performance congruous with the source audio, bandwidth extension methods offers the opportunity to generate low-frequency content with consistent intensity. The methods studied are pitch-shifting, sub-harmonic generation and a synthesis approach based on dynamic signal generation. Preliminary objective analysis of generated signals provides insight into overall dynamic and timbral characteristics of each method. This analysis then informs findings drawn from the results of a subjective test in which each method is comparatively evaluated in terms of user preference when deployed as part of a multi-sensory entertainment system for music reproduction.
ER  -