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EURASIP Journal on Audio, Speech, and Music Processing
Figure 4 | EURASIP Journal on Audio, Speech, and Music Processing

Figure 4

From: ViSQOL: an objective speech quality model

Figure 4

Block diagram of POLQA perceptual model block. The perceptual model calculates distortion indicators. An idealisation is carried out on the reference signal to remove low levels of noise and optimize timbre of the reference signal prior to the difference calculation for disturbance density estimation.

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