Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Nokia Technologies Oy

Tapio Lokki

Ville Topias Pulkki

Juha Merimaa

Antti Johannes Eronen

Tapani Pihlajakuja

Archontis Politis

Otto Puomio

An apparatus comprising means configured to: obtain at least one impulse response; obtain at least one reflection filter based on the obtained at least one impulse response, wherein the at least one reflection filter is configured to determine at least one early reflection from an acoustic surface which is not overlapped in time by any other reflection, wherein a duration of the at least one early reflection is shorter than a duration of the obtained at least one impulse response. In addition, an apparatus comprising means configured to: obtain at least one impulse response, wherein the at least one impulse response is configured with a perceivable timbre during rendering; create a timbral modification filter; obtain at least one audio signal; and render at least one output audio signal based on the at least one audio signal, wherein the at least one output signal is based on an application of the timbral modification filter.

Rendering reverberation

The invention concerns a method for reproducing spatial impression of existing spaces in multichannel or binaural listening. It consists of following steps/phases: a) Recording of sound or impulse response of a room using multiple microphones, b) Time- and frequency-dependent processing of impulse responses or recorded sound, c) Processing of sound to multichannel loudspeaker setup in order to reproduce spatial properties of sound as they were in recording room, and (alternative to c), d) Processing of impulse response to multichannel loudspeaker setup, and convolution between rendered responses and an arbitrary monophonic sound signal to introduce the spatial properties of the measurement room to the multichannel reproduction of the arbitrary sound signal, and is applied in sound studio technology, audio broadcasting, and in audio reproduction.

Method for reproducing natural or modified spatial impression in multichannel listening

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Helsinki, Finland

Tapio Lokki