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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 01192/KOLNP/2005 A
(22) Date of filing of Application: 21/06/2005 (43) Publication Date: 09/06/2006
(54) Title of the invention: APPARATUS AND METHOD OF DETERMINING AN INPULSE RESPONSE AND APPARATUS
AND METHOD OF PRESENTING AN AUDIO PIECE
(51) International classification : H04S 7/00
(31) Priority Document No : 102 54 470.0
(32) Priority Date : 21/11/2002
(33) Name of priority country : GERMANY
(86) International Application No and : PCT/EP03/012449
Filing Date
: & 06/11/2003
(87) International Publication No : WO 04/047486
(61) Patent of addition to Application No : NA
Filed on : NA
(62) Divisional to Application No : NA
Filed on : NA
(57) Abstract:
The apparatus for determining an impulse response in an
environment in which a speaker (10) and a microphone (12) are
placed works using an audio signal. Means (20) for spectrally
coloring a test signal, which preferably is a pseudonoise signal, works
using a psychoacoustic masking threshold of the audio signal to
obtain a colored test signal, which is embedded in the audio signal to
obtain a measuring signal, which can be fed to the speaker (10).
Means (30, 32) for determining the impulse response preferably
performs a cross-correlation of a reaction signal received via the
microphone from the environment and the test signal or the colored
test signal. With this, an impulse response of an environment may
also be determined during the presentation of an audio piece to
provide an optimal description of environment for a wave-field
synthesis.
(Fig. 1)
(71) Name of Applicant:
FRAUNHOFER-GESELLSCHAFT ZUR
FORDERUNG DER ANGEWANDTEN
FORSCHUNG E.V.,
Address of the Applicant:
HANSASTRASSE 27 C 80686 MUNICH,
GERMANY.
(72) Name of the Inventor:
1) THOMAS SPORER
2) CHRISTIAN NEUBAUER
Filed U/S 5(2) before The Patents (Amendment)
Act, 2005: NO
The Patent Office Journal 09/06/2006 11081