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Binaural rendering of Ambisonic signals by head-related impulse response time alignment and a diffuseness constraint
| Publication ID | 66014 |
| Abstract | Binaural rendering of Ambisonic signals is of great interest in the fields of virtual reality, immersive media, and virtual acoustics. Typically, the spatial order of head-related impulse responses (HRIRs) is considerably higher than the order of the Ambisonic signals. The resulting order reduction of the HRIRs has a detrimental effect on the binaurally rendered signals, and perceptual evaluations indicate limited externalization, localization accuracy, and altered timbre. In this contribution, a binaural renderer, which is computed using a frequency-dependent time alignment of HRIRs followed by a minimization of the squared error subject to a diffuse-field covariance matrix constraint, is presented. The frequency-dependent time alignment retains the interaural time difference (at low frequencies) and results in a HRIR set with lower spatial complexity, while the constrained optimization controls the diffuse-field behavior. Technical evaluations in terms of sound coloration, interaural level differences, diffuse-field response, and interaural coherence, as well as findings from formal listening experiments show a significant improvement of the proposed method compared to state-of-the-art methods. |
| ISSN ISBN | 0001-4966 |
| Volume | 143 |
| Journal Nr. | 6 |
| Page from - to | 3616-3627 |
| Publisher Month | 06 |
| Status | published |
| Publication Reference | journal article |
| Year of Publication | 2018 |
| Authors | |
| Keywords | Binaural Rendering, Ambisonics |