def degradation_integration(mos_cod_v, deg_cod_v, deg_scal_v, deg_frame_rate_v):
"""
Integrate the three degradations
"""
deg_all = utils.constrain(deg_cod_v + deg_scal_v + deg_frame_rate_v, 0.0, 100.0)
qv = 100 - deg_all
return utils.mos_from_r(qv)
def audio_model_function(self, codec, bitrate):
"""
Calculate MOS value based on codec and bitrate.
- codec: used audio codec, must be one of mp2, ac3, aaclc, heaac
- bitrate: used audio bitrate in kBit/s
"""
if codec not in self.VALID_CODECS:
raise P1203StandaloneError(
"Unsupported audio codec {}, use any of {}".format(
codec, self.VALID_CODECS))
q_cod_a = self.COEFFS_A1[codec] * math.exp(
self.COEFFS_A2[codec] * bitrate) + self.COEFFS_A3[codec]
qa = 100 - q_cod_a
mos_audio = utils.mos_from_r(qa)
return mos_audio