Method of simulating a room and/or sound impression

Claim 1

A method of simulating a room impression and/or sound impression occuring at a representative listening location in a room with one of monophonic, stereophonic and multichannel reproduction, the method comprising the steps of: selecting a room whose sound is to be simulated; determining within the room a location of a representative listening location; determining at the representative listening location a corresponding room impulse response at least for one channel; determining for the determined room impulse response a threshold value which extends over at least a portion of the duration of the determined room impulse response; and by comparing the determined room impulse response with the threshold value, producing a reduced room impulse response which within the portion of the duration of the determined room impulse response only includes those contents of the determined room impulse response in which a momentary amplitude is above the threshold value, while setting the reduced room impulse response to the value zero for those contents of the determined room impulse response whose momentary amplitude is below the threshold value, and which outside of the portion of the duration of the determined room impulse response contains the determined room impulse response in unchanged form.

Claim 2

A method of simulating a room impression and/or sound impression occuring at a representative listening location in a room with one of monophonic, stereophonic and multichannel reproduction, the method comprising the steps of: selecting a room whose sound is to be simulated; determining within the room a location of a representative listening location; determining at the representative listening location a corresponding room impulse response at least for one channel; determining for the determined room impulse response a threshold value which extends over at least a portion of the duration of the determined room impulse response; and by comparing the determined room impulse response with the threshold value, producing a reduced room impulse response which within the portion of the duration of the determined room impulse response only includes those contents of the determined room impulse response in which a momentary amplitude is above the threshold value, while setting the reduced room impulse response to the value zero for those contents of the determined room impulse response whose momentary amplitude is below the threshold value, and which outside of the portion of the duration of the determined room impulse response contains the determined room impulse response in unchanged form.

Claim 14

An apparatus for simulating a room impression and/or sound impression occurring at a representative listening location in a room, comprising means for determining at the representative listening location a corresponding room impulse response at least for one channel, for determining for the determined room impulse response a threshold value which extends over at least a portion of the duration of the determined room impulse response and, by comparing the determined room impulse response to the threshold value, for producing a reduced room impulse response which within the portion of the duration of the determined room impulse response only includes those contents of the determined room impulse response in which a momentary amplitude is above the threshold value while setting the reduced room impulse response to the value zero for those contents of the determined room impulse response whose momentary amplitude is below the threshold value, and which outside of the portion of the duration of the determined room impulse response contains the determined room impulse response in unchanged form, further comprising an electronic circuit having programmed therein the reduced room impulse response obtained by said means, the circuit comprising at least one input for feeding in one of a monophonic, a stereophonic and a multichannel audio program, at least one channel and for each channel at least one audio output for outputting a Processed audio program obtained by convolving the fed-in audio program with the reduced room impulse response for each channel.

Claim 15

An apparatus for simulating a room impression and/or sound impression occurring at a representative listening location in a room, comprising means for determining at the representative listening location a corresponding room impulse response at least for one channel, for determining for the determined room impulse response a threshold value which extends over at least a portion of the duration of the determined room impulse response and, by comparing the determined room impulse response to the threshold value, for producing a reduced room impulse response which within the portion of the duration of the determined room impulse response only includes those contents of the determined room impulse response in which a momentary amplitude is above the threshold value while setting the reduced room impulse response to the value zero for those contents of the determined room impulse response whose momentary amplitude is below the threshold value, and which outside of the portion of the duration of the determined room impulse response contains the determined room impulse response in unchanged form, further comprising an electronic circuit having programmed therein the reduced room impulse response obtained by said means, the circuit comprising at least one input for feeding in one of a monophonic, a stereophonic and a multichannel audio program, at least one channel and for each channel at least one audio output for outputting a Processed audio program obtained by convolving the fed-in audio program with the reduced room impulse response for each channel.