Patent ID: 7783047

Claim:
A sound field reproduction apparatus adapted to reproduce a sound field in a virtual space within a predetermined area of a real space from contents data including information on a position of a sound source in a virtual space and sound data in response to information on a position of a listener indicating the position of the listener in the virtual space, the apparatus comprising: sound field synthesizing parameter generating means for generating sound field synthesizing parameters in response to a relative positional relationship between the position of the listener and the position of the sound source based on information on the position of the listener and information on the position of the sound source; frequency conversion means for performing frequency conversion on sound data as a function of the relative positional relationship according to the information on the position of the listener and the information on the position of the sound source, in which the frequency conversion on the sound data corresponds to a Doppler effect due to movement of the position of the listener or the position of the sound source; modifying means for modifying the sound field synthesizing parameters generated by the sound field synthesizing parameter generating means in accordance with a change in the relative positional relationship between the position of the listener and the position of the sound source so as to form modified sound field synthesizing parameters; sound field synthesizing means for performing a convolutional operation on the sound data subjected to frequency conversion by the frequency conversion means and the modified sound field synthesizing parameters by the modifying means and synthesizing sound data for each of n channels; and sound field reproducing means for performing an operation of wave front synthesis, using the synthesized sound data for each channel and reproducing a sound field in a predetermined area.