EP 2006841 A1 20081224 - Signal processing method and device and training method and device
Title (en)
Signal processing method and device and training method and device
Title (de)
Signalverarbeitungsverfahren und Trainingsverfahren und Vorrichtungen dazu
Title (fr)
Méthode et dispositif de traitement du signal et système d'entraînement
Publication
Application
Priority
EP 06007389 A 20060407
Abstract (en)
A Signal processing method comprises the steps of - acquisition of an audio signal (A1 y(t)), - periodically digitizing the audio signal (A1 y(t)) resulting in frames (1) of the digitized audio signal (A4 y 1 (n)), - determining a noisy audio signal spectrum (A6 Y 1 (k)) for each frame (1) of the digitized audio signal (A4 y 1 (n)), - determining quantized a priori and a posteriori signal to noise ratios (A10 ¾ 1 A12 ³,( k )) depending on the noisy audio signal spectrum (A6 Y 1 (k)) for the provided discrete frequencies (k) of each frame (1), - determining for the provided discrete frequencies (k) given associated Perceptual scale gain values A ¢ 28 ¢ G VAD Bark m dependent on the quantized a priori and a posteriori signal to noise ratios (A14 ¾ 1 ( k ), A16 ³ l ( k )), the given Perceptual scale gain values A ¢ 28 ¢ G VAD Bark m being provided on a Perceptual scale for respective Perceptual scale subbands (m), - multiplying the respective spectral values of the noisy audio signal spectrum (A6 Y 1 (k)) of the respective frame (1) with the determined respective Perceptual scale gain values A ¢ 28 ¢ G VAD Bark m resulting in estimated wanted spectrum values (A50 X 1 ( k )) and - determining an estimated digitized wanted signal (A48 x 1 ( n )) dependent on the estimated wanted spectrum values (A50).
IPC 8 full level
G10L 21/02 (2006.01); G10L 21/0208 (2013.01)
CPC (source: EP)
G10L 21/0208 (2013.01)
Citation (search report)
- [XA] EP 1635331 A1 20060315 - SIEMENS AG [DE]
- [A] US 6643619 B1 20031104 - LINHARD KLAUS [DE], et al
- [A] SETIAWAN PANJI ET AL: "Robust speech recognition for mobile devices in car noise", EUR. CONF. SPEECH COMMUN. TECHNOL.; 9TH EUROPEAN CONFERENCE ON SPEECH COMMUNICATION AND TECHNOLOGY; 9TH EUROPEAN CONFERENCE ON SPEECH COMMUNICATION AND TECHNOLOGY, EUROSPEECH INTERSPEECH 2005, 4 September 2005 (2005-09-04), pages 2673 - 2676, XP002395155
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2007003189 W 20070410; EP 06007389 A 20060407