Artificial reverberator room size control
OwnerJonathan S. Abelinventor
Life of this patent
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Abstract
In music recording and virtual reality applications, it is desired to control the perceived size of a synthesized acoustic space. In an embodiment, a room size parameter is used to modify characteristics of an artificial reverberator so as to affect a listener's sense of the size of the acoustic space. Properties of the reverberation related to perceived room size such as decay time and equalization are adjusted interactively.
Claims14
An artificial reverberator comprising:
- an input for accepting a nominal room impulse response;
- an input for accepting a perceived room size control, wherein the perceived room size control specifies a perceived room size that is different than a nominal room size associated with the nominal room impulse response;
- and
- a convolution operation with a processing room impulse response, wherein the processing room impulse response is derived by resampling a generating room impulse response related to the nominal impulse response according to the perceived room size control.
A method for artificial reverberation comprising:
- identifying a nominal room impulse response;
- identifying a perceived room size control, wherein the perceived room size control specifies a perceived room size that is different than a nominal room size associated with the nominal room impulse response;
- forming a processing room impulse response by adjusting the nominal room impulse response according to the perceived room size control;
- and
- convolving a signal with the processing room impulse response.
A method for adjusting a perceived room size of an artificial reverberator comprising:
- identifying a nominal reverberation decay time;
- identifying a perceived room size control, wherein the perceived room size control specifies the perceived room size that is different than a nominal room size associated with the nominal room reverberation decay time;
- identifying a decay time associated with air absorption;
- and
- forming a desired reverberation time by adjusting the nominal reverberation decay time according to the perceived room size control and taking into account the air absorption decay time.
A system for artificial reverberation comprising
- a perceived room size control, wherein the perceived room size control specifies a perceived room size that is different than a nominal room size, and
- a network of delay lines, each having a nominal length associated with the nominal room size, and wherein the length of at least one of the delay lines is adjusted from the nominal length according to the perceived room size control.
A system for artificial reverberation comprising:
- a perceived room size control, wherein the perceived room size control specifies a perceived room size that is different than a nominal room size associated with a nominal room impulse response,
- a set of resonant filters representing modes of a room, the set of resonant filters being derived from the nominal room impulse response, each resonant filter characterized by a mode frequency and mode decay rate, and
- a means to adjust the mode decay rate associated with one of the resonant filters in response to the perceived room size control.
Dependencies are inferred from the claim text.