EP 1468416 A1 20041020 - METHOD FOR QUALITATIVE EVALUATION OF A DIGITAL AUDIO SIGNAL
Title (en)
METHOD FOR QUALITATIVE EVALUATION OF A DIGITAL AUDIO SIGNAL
Title (de)
VERFAHREN ZUR QUALITATIVEN BEWERTUNG EINES DIGITALEN AUDIOSIGNALS
Title (fr)
PROCEDE D'EVALUATION QUALITATIVE D'UN SIGNAL AUDIO NUMERIQUE.
Publication
Application
Priority
- FR 0300222 W 20030123
- FR 0200856 A 20020124
Abstract (en)
[origin: WO03063134A1] The invention relates to a method for qualitative evaluation of a digital audio signal, characterized in that a quality indicator consisting of a vector associated with each time window is calculated in real and continuous time in successive time windows. The generation of said quality indicator vector involves, for example, the following stages for a reference audio signal and an audio signal to be evaluated: calculation of the spectral density of the power of the audio signal or calculation of the coefficients of a prediction filter by means of an autoregressive method, or calculation of the time activity of the signal or calculation of the minimum spectrum in successive blocks of the signal. The method can involve calculation of a distance between the vectors of the reference audio signal and the audio signal to be evaluated which are associated with each time window in order to evaluate the degradation of the audio signal.
IPC 1-7
IPC 8 full level
G10L 25/69 (2013.01)
CPC (source: EP US)
G10L 25/69 (2013.01 - EP US)
Citation (search report)
See references of WO 03063134A1
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 03063134 A1 20030731; CA 2474067 A1 20030731; CA 2474067 C 20141230; EP 1468416 A1 20041020; EP 1468416 B1 20151223; FR 2835125 A1 20030725; FR 2835125 B1 20040618; US 2005143974 A1 20050630; US 2012099734 A1 20120426; US 8036765 B2 20111011; US 8606385 B2 20131210
DOCDB simple family (application)
FR 0300222 W 20030123; CA 2474067 A 20030123; EP 03715043 A 20030123; FR 0200856 A 20020124; US 201113219391 A 20110826; US 50242505 A 20050125