It is desirable to properly generate inter-channel crosstalk while reproducing legacy stereo sound sources through earphones and headphones. The authors proposed amplitude-based and phase-based crosstalk generators, of which parameters were perceptually optimized by performing a listening test. The optimal parameters were determined based on the perceptual width of the stereo stage by comparing the proposed method with binaural rendering. This paper investigates the relationship between the perceptual stereo stage width and inter-channel cross-correlation. It is confirmed that the inter-channel cross-correlation has non-linear relation to the perceptual stereo stage width. This result contributes to efficiently optimizing the crosstalk generators without subject evaluation.
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