Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
Reexamination Certificate
2003-01-23
2011-10-11
Goins, Davetta (Department: 2614)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Digital audio data processing system
C704SE19002
Reexamination Certificate
active
08036765
ABSTRACT:
The invention relates to a method of qualitatively evaluating a digital audio signal. It calculates a quality indicator consisting of a vector associated with each time window in real time, in continuous time, and in successive time windows. For example, the generation of a quality indicator vector calculates, for a reference audio signal and for an audio signal to be evaluated, the spectral power density of the audio signal, the coefficients of a prediction filter, using an autoregressive method, a temporal activity of the signal or the minimum value of the spectrum in successive blocks of the signal. To evaluate the deterioration of the audio signal, the method may calculate a distance between the vectors of the reference audio signal and the audio signal to be evaluated associated with each time window.
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Real-time, Computer Dictionary Online, Nov. 23, 1997, http://www.computer-dictionary-online.org/index.asp?q=real-time.
Alston & Bird LLP
Goins Davetta
Saunders, Jr. Joseph
Telediffusion de France
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