Subjective audio quality evaluation of embedded-optimization-based distortion precompensation algorithms

Defraene, Bruno; Waterschoot, Toon van; Diehl, Moritz; Moonen, Marc

doi:10.1121/1.4955025

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…In terms of the ideal number of participants to use in such audio quality evaluations, the International Telecommunication Union Radiocommunication (ITU-R) body advocates a minimum of 10, if using expert listeners, or minimum of 20, if using nonexpert listeners [29]. Existing subjective audio evaluation studies have tended to comply with this utilisation of small sample sizes, with 26 being an average number of participants [30][31][32][33].…”

Section: Perceptual Audio Evaluationmentioning

confidence: 99%

Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM

Cunningham

McGregor

2019

International Journal of Digital Multimedia Broadcasting

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Audio data compression has revolutionised the way in which the music industry and musicians sell and distribute their products. Our previous research presented a novel codec named ACER (Audio Compression Exploiting Repetition), which achieves data reduction by exploiting irrelevancy and redundancy in musical structure whilst generally maintaining acceptable levels of noise and distortion in objective evaluations. However, previous work did not evaluate ACER using subjective listening tests, leaving a gap to demonstrate its applicability under human audio perception tests. In this paper, we present a double-blind listening test that was conducted with a range of listeners (N=100). The aim was to determine the efficacy of the ACER codec, in terms of perceptible noise and spatial distortion artefacts, against de facto standards for audio data compression and an uncompressed reference. Results show that participants reported no perceived differences between the uncompressed, MP3, AAC, ACER high quality, and ACER medium quality compressed audio in terms of noise and distortions but that the ACER low quality format was perceived as being of lower quality. However, in terms of participants’ perceptions of the stereo field, all formats under test performed as well as each other, with no statistically significant differences. A qualitative, thematic analysis of listeners’ feedback revealed that the noise artefacts that produced the ACER technique are different from those of comparator codecs, reflecting its novel approach. Results show that the quality of contemporary audio compression systems has reached a stage where their performance is perceived to be as good as uncompressed audio. The ACER format is able to compete as an alternative, with results showing a preference for the ACER medium quality versions over WAV, MP3, and AAC. The ACER process itself is viable on its own or in conjunction with techniques such as MP3 and AAC.

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Section: Perceptual Audio Evaluationmentioning

confidence: 99%

Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM

Cunningham

McGregor

2019

International Journal of Digital Multimedia Broadcasting

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“…Their subjective experiment was used to quantitatively evaluate the combination of acoustic parameters and degree of diffusion. Burno [12] conducted a subjective audio quality evaluation experiment to assess the performance of a precompensation algorithm for mitigating perceptible linear and nonlinear distortion in audio signals. The subjective experiment in his study used a degradation category scale to quantitatively evaluate the sound quality.…”

Section: Introductionmentioning

confidence: 99%

Impact of Structural Parameters on the Auditory Perception of Musical Sounds in Closed Spaces: An Experimental Study

Wang

Zeng

2019

Applied Sciences

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This study attempts to investigate the impact of structural parameters (volume, shape, and the wall absorption coefficient) in closed space on the auditory perception of three different musical sound types. With binaural audibility technology and room impulse response measurement (RIR), this paper first verifies the reliability of using ODEON software in simulating simplified closed-space auditory scenes. Then, 96 music binaural signals produced in eight simulated closed spaces with different structural parameters are synthesized. Finally, auditory perception experiment is conducted on the synthesized binaural signals by using pair comparison method, and variance analysis is also made on the experimental results. It is concluded that (1) a hemispherical cabin with a small volume and large wall sound absorption coefficient is most suitable for playing a single instrument, such as the flute or violin, and (2) a cabin with large volume is suitable for playing multiple instruments music such as symphony, but the walls should not be totally reflective. The experimental scheme and results of current study provide guidance for designing the inner structure of the concert hall to achieve preferable auditory perception in practice.

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Subjective audio quality evaluation of embedded-optimization-based distortion precompensation algorithms

Cited by 2 publications

References 7 publications

Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM

Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM

Impact of Structural Parameters on the Auditory Perception of Musical Sounds in Closed Spaces: An Experimental Study

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