VERFAHREN UND ANORDNUNG FÜR DAS SCHÄTZEN EINER RAUMIMPULSANTWORT

• Main Authors: MOONEN, MARC, STRUYVE, KRIS, ROMBOUTS, GEERT, VAN WATERSCHOOT, TOON, VERHOEVE, PIET
• Format: Patent
• Language: German
• Published: 15.08.2010

The present invention relates to a method for estimating a room impulse response, comprising the steps of : a) applying a far-end signal to a first filter (11) and to a loudspeaker (2) broadcasting said far-end signal in a room, b) picking up by means of a microphone (1) a signal from said room, said signal comprising said broadcast far-end signal and a near-end signal, c) applying the difference signal between a version of said far-end signal filtered by said first filter (11) and said signal picked up with said microphone (1) to an adaptive linear prediction filter (9), d) updating said adaptive linear prediction filter's coefficients â, taking into account the signal output by said adaptive linear prediction filter (9), e) copying said updated coefficients of said adaptive linear prediction filter (9) into a third filter (13) and a fourth filter (14), f) applying said far-end signal to said third filter (13) and calculating the output of said third filter (13), g) applying said 3 rd filter's output to a fifth filter, h) calculating an update of said fifth adaptive filter's filter coefficients f , taking into account the difference signal between the signal output by said fifth filter (15) and a version of signal received by said microphone (1), filtered by said fourth filter (14), and i) copying said adaptive fifth filter's updated coefficients into said first filter (11).