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ludlows / PESQ

PESQ (Perceptual Evaluation of Speech Quality) Wrapper for Python Users (narrow band and wide band)
https://github.com/ludlows/PESQ
MIT License
518 stars 97 forks source link

PESQ score greater than 4.5? #51

Closed frankfyf closed 1 year ago

frankfyf commented 1 year ago

It has been mentioned in many literature that the PESQ score should be ranged from -0.5 to 4.5, but when I set the ref and the deg to be the same it always return a constant value greater than 4.5 (~4.64 actually) , is this something by design or did I missed anything?

For example:

fs = 16000
duration = 10
rand_audio = np.random.randn(duration*fs)
pesq(
    fs,
    rand_audio,
    rand_audio,
    'wb'
)

always gives 4.643888473510742

ludlows commented 1 year ago

Hi @frankfyf , have you check this issue (https://github.com/ludlows/PESQ/issues/13)?