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Thus, the spatial direction and location of virtual sound image are mainly considered in the subjective experiment to evaluate the spatial perceptual distortion caused by quantization of spatial parameters with different methods.
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Thus, with the perceptual characteristics of JND, if the spatial distortion caused by quantization errors of spatial parameters can be limited below the JND thresholds, then the quantization is almost perceptual lossless.
If the spatial distortion caused by quantization errors of spatial parameters can be limited below, the correlated JND threshold, then the quantization can be regarded as nearly perceptual lossless.
Thus, in parametric stereo (PS), the uniform quantization of spatial parameters are replaced by nonuniform quantization according to the perceptual sensitivity attributes of interaural cues.
In this comparison experiment, the core quantization of spatial parameters ICLDs were replaced with different quantization methods.
MPEG surround and Choi's methods provide quantization of spatial parameters ICLDs between channel pairs.
In this paper, the quantization of spatial parameters between two or more channel signals are both discussed.
Owing to the quantization of spatial parameters, the spatial qualities of test signals are different with that of the original signals.
The abovementioned spatial audio coding methods are mainly based on the elementary mechanism of parametric stereo and focus on the quantization of spatial parameters between two channel signals.
Just noticeable difference (JND) characteristics of human auditory system can be used to efficiently remove spatial perceptual redundancy in the quantization of spatial parameters.
In the current experiment, the codebook sizes required for quantization of spatial direction information in a circle of 360° at horizontal plane were compared between proposed JSPQ and reference quantization methods.
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CEO of Professional Science Editing for Scientists @ prosciediting.com