Spatial processing stereo system
First Claim
Patent Images
1. A spatial processing stereo system (SPSS), comprising:
- a plurality of filters for filtering a left audio signal and a right audio signal;
a room response generator;
a user interface for entry of parameters associated with the spatial attributes of a room;
a user response processor that receives the parameters from the user interface and generates coefficients that are used by at least one of the plurality of filters and being in receipt of a room impulse response that is also used by at least one of the plurality of filters; and
at least two additional audio signals that are generated with filters that use the coefficients filtering the left audio signal and right audio signal with a signal processor that receives at least the right audio and the left audio signal and generates at least a left signal, a first left surround signal, a right signal and a first right surround signal with a coefficient matrix using the coefficients where the signal processor includes a pair of shelving filters and a pair of delay lines and generates at least a second left surround signal and a second right surround signal.
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Abstract
A spatial processing stereo system (“SPSS”) that receives audio signals and a limited number of user input parameters associated with the spatial attributes of a room, such as “room size”, “stage distance”, and “stage width”. The input parameters are used to define a listening room and generate coefficients, room impulse responses, and scaling factors that are used generate additional surround signals.
301 Citations
22 Claims
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1. A spatial processing stereo system (SPSS), comprising:
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a plurality of filters for filtering a left audio signal and a right audio signal; a room response generator; a user interface for entry of parameters associated with the spatial attributes of a room; a user response processor that receives the parameters from the user interface and generates coefficients that are used by at least one of the plurality of filters and being in receipt of a room impulse response that is also used by at least one of the plurality of filters; and at least two additional audio signals that are generated with filters that use the coefficients filtering the left audio signal and right audio signal with a signal processor that receives at least the right audio and the left audio signal and generates at least a left signal, a first left surround signal, a right signal and a first right surround signal with a coefficient matrix using the coefficients where the signal processor includes a pair of shelving filters and a pair of delay lines and generates at least a second left surround signal and a second right surround signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for spatial processing in a spatial processing stereo system (SPSS), comprising:
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receiving parameters at a user interface associated with spatial attributes of a room; filtering a left audio signal and a right audio signal with a plurality of filters; generating with a room response generator having a user response processor that receives the parameters from the user interface, coefficients that are used by at least one of the plurality of filters that is in receipt of a room impulse response; and processing the left audio signal and right audio signal with the at least one of the plurality of filters to generate at least two other surround audio signals with a processor that receives at least the right audio signal and the left audio signal and generates at least a left signal, a first left surround signal, a first right surround signal with a coefficient matrix using the coefficients where the signal processor includes a pair of shelving filters and a pair of delay lines and at least a second left surround signal and a second right surround signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A spatial processing stereo system (SPSS), comprising:
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a plurality of filters for filtering a left audio signal and a right audio signal; a room response generator; a user interface for entry of parameters associated with spatial attributes that include a room size spatial attribute, a stage width spatial attribute and a stage distance spatial attribute; a user response processor that receives the parameters from the user interface and generates coefficients that are used by at least one of the plurality of filters; a room response generator that determines the room impulse response for the room size spatial attribute, where the impulse response is used by at least one of the plurality of filters; and at least two additional, audio signals that are generated with filters that use the coefficients with the left audio signal and right audio signal. - View Dependent Claims (21)
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22. A spatial processing stereo system (SPSS), comprising:
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a plurality of filters for filtering a left audio signal and a right audio signal; a room response generator; a user interface for entry of parameters associated with spatial attributes of a room; a signal processor that receives at least the right audio signal and the left audio signal and generates at least a left signal and right signal and center signal with a coefficient matrix using the coefficients generated from at least one of the parameters and a shelving filter that receives delay amplitude scale coefficients derived from at least one of the parameters and generates at least a first left surround signal and a first right surround signal; a user response processor that receives the parameters from the user interface and generates coefficients that are used by at least one of the plurality of filters and being in receipt of a room impulse response that is also used by at least one of the plurality of filters; and at least two additional audio signals that are generated with filters that use the coefficients filtering the left audio signal and right audio signal and where the signal processor includes a fast convolution processor that generates a second left surround signal and a second right surround signal using at least one of the parameters.
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Specification