Converter and method for converting an audio signal
AssigneeAuro Technologies NV
InventorsWilfried Van Baelen, Ralph Kessler
Life of this patent
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Abstract
A converter and conversion method are disclosed for converting N channel audio input channels into M channel audio output channels, wherein a processor is used for applying a transfer function to a signal received on an input channel to obtain reverberation components of a calculated output channel, wherein said transfer function is a simplified transfer function matching a selected subset of a set of local maxima of a measured reverberation when applied to a corresponding stimulus.
Claims16
A method for simplifying a model of an acoustic environment (1), wherein said model comprises a set of transfer functions, each transfer function corresponding to the sound propagation (4, 5) from a sound emitting position (2) to a sound receiving position (3) in said acoustic environment (1), the method comprising, for each transfer function, the step of:
- calculating a simulated reverberation of a first stimulus emitted at said sound emitting position as received at said sound receiving position by applying said transfer function to said first stimulus;
- characterised in that the method further comprises the steps of:
- selecting a subset (31, 32, 35) of a set of local maxima (31, 32, 33, 34, 35) in an intensity envelope (30) of the simulated reverberation;
- and
- calculating a simplified transfer function which, applied to said first stimulus, provides a simulated reverberation with an intensity envelope matching said selected subset (31,32, 35) of local maxima (31, 32, 33, 34, 35).
Dependencies are inferred from the claim text.