Method of generating a left modified and a right modified audio signal for a stereo system
AssigneeKoninklijke Philips Electronics N.V.
InventorDaniel Willem Elisabeth Schobben
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Abstract
The invention relates to a method of generating a left modified and a right modified audio signal for a stereo system from multichannel audio signals (XL, XR, XLS, XRS, and XC) with a left and a right channel and at least one further audio channel. According to the invention, the signal of the channel of highest energy is modified in a filter (1) with a transformation function in a first parallel branch (2) and is modified in a second filter (6) with a reverberation function in a second parallel branch (5), whereupon the modified signals are joined together in a summation unit (8).
Claims20
A method of generating virtual sound signals from multi-channel audio signals, the method comprising the steps of:
- determining, from the multi-channel audio signals, at least one signal of relative highest energy;
- filtering the remaining audio signals of the multi-channel audio signals not being determined as the at least one signal of relative highest energy of the multi-channel audio signals;
- first summing said at least one signal of the relative highest energy with, if any, the filtered remaining audio signals thereby forming a first summed signal;
- and
- transforming the first summed signal into a virtual sound signal.
An apparatus for generating virtual sound signals from multi-channel audio signals, the apparatus comprising:
- means for determining, from the multi-channel audio signals, at least one signal of relative highest energy;
- filters for filtering the remaining audio signals of the multi-channel audio signals not being determined as the at least one signal of relative highest energy of the multi-channel audio signals;
- a first summing device for summing said at least one signal of the relative highest energy with, if any, the filtered remaining audio signals thereby forming a first summed signal;
- and
- a transform circuit for transforming the first summed signal into a virtual sound signal.
Dependencies are inferred from the claim text.