Method of evaluating perception intensity of an audio signal and a method of controlling an input audio signal on the basis of the evaluation
View Patent ↗Method of evaluating perception intensity of an audio input signal (IS) comprising the steps of receiving the audio input signal (IS), estimating a time variant distribution function (TVDF) on the basis of said audio input signal (IS) or a derivative thereof, determining the perception intensity as at least one perception intensity estimate (PIE) on the basis of said estimated time variant distribution function (TVDF). According to the invention perception intensity has been obtained on the basis of a time variant distribution function. Thereby, an advantageous universal and flexible determination of perception intensity is obtained. The universal applicability is basically obtained due to the fact that a distribution function may match and describe audio input signal of very different nature. Thus, according to the invention even speech, music and noise may be evaluated on the basis of a distribution function.
1. Method of evaluating perception intensity of an audio input signal comprising:
receiving the audio input signal;
estimating a time variant distribution function on the basis of said audio input signal or a derivative thereof;
determining the perception intensity as at least one perception intensity estimate on the basis of said estimated time variant distribution function;
establishing at least two different partial representations of the audio input signal,
establishing at least two different statistical functions on the basis of at least one of said different partial representations of said audio input signal; and
combining said determined statistical functions into a perception intensity representation by means of at least one non-linear signal processing.
2. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said estimating of a time variant distribution function is referring to the audio input signal.
3. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said estimating of a time variant distribution function is made on the basis of a modified audio input signal.
4. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said audio input signal comprises a sequence of input samples.
5. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said perception intensity estimate comprises an output sample.
6. Method of evaluating perception intensity of an audio input signal according to claim 5 , wherein the determining of a perception intensity representative output samples is established on the basis of a weighted accumulation of at least two time variant distribution functions estimated at least two different times.
7. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said time variant distribution function is estimated by a shape description of a distribution function.
8. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said time variant distribution comprises an amplitude distribution function.
9. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said time variant distribution comprises a power distribution function.
10. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said time variant distribution comprises a sound intensity distribution function.
11. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said time variant distribution comprises a two-dimensional distribution function.
12. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein the determining of the perception intensity estimate is made on the basis of at least two time variant distribution functions estimated at least two different times.
13. Method of evaluating perception intensity of an audio input signal according to claim 1 ,
wherein an output sample is determined on the basis of a least two audio input samples.
14. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein the determining the perception intensity is established on the basis of said estimated time variant distribution function according to at least one non-linear function.
15. Method of evaluating perception intensity of an audio input signal according to claim 14 , wherein said at least one non-linear function is established by an artificial neural network.
16. Method of evaluating perception intensity of an audio input signal according to claim 15 , wherein said artificial neural network comprises a multilayer perceptron.
17. Method of evaluating perception intensity of an audio input signal according to claim 14 , wherein said at least one non-linear function is established by means of polynomial fitting.
18. Method of evaluating perception intensity of an audio input signal according to claim 14 , wherein said at least one non-linear function is established by means of splining.
19. Method of evaluating perception intensity of an audio input signal according to claim 14 , wherein the evaluation is established by a serial, a parallel or a combination thereof of at least two non-linear functions.
20. Method of evaluating perception intensity of an audio input signal according to claim 14 , wherein said non-linear function is established on the basis of adaptation data.
21. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said perception intensity comprises loudness.
22. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said perception intensity comprises sharpness, annoyance, airiness, punchiness, brilliance, presence, fatness, deepness or edginess or any combination thereof.
23. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein the estimation of said time variant distribution function is made on the basis of at least two different feature characterizing parameters of said audio input signal.
24. Method of evaluating perception intensity of an audio input signal according to claim 23 , wherein at least one of said at least two different characterizing functions comprises a time variant statistical function.
25. Method of evaluating perception intensity of an audio input signal according to claim 23 , wherein at least one of said feature characterizing parameters comprises a central value over time.
26. Method of evaluating perception intensity of an audio input signal according to claim 23 , wherein at least one of said feature characterizing parameters comprises a measure of the spread over time, standard deviation, variance or inter quartile range.
27. Method of evaluating perception intensity of an audio input signal according to claim 23 , wherein preprocessing of the audio input signal is done prior to the establishment of said at least two feature characterizing parameters.
28. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said time variant distribution function is determined in a time window.
29. Method of evaluating perception intensity of an audio input according to claim 1 , wherein said audio input signal is modified on the basis of said evaluated perception intensity.
30. Method of evaluating perception intensity of an audio input signal according to claim 29 , wherein said modifying of the audio input signal is performed as a gain control of the complete or a part of the audio input signal.
31. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said audio input signal comprises a multichannel signal.
32. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein the perception intensity refers to a one-parameter evaluation of the audio input signal or a derivative thereof.
33. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein the audio input signal or a derivative thereof is evaluated with respect to two or more different types of perception intensity and combinations thereof.
34. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said method is implemented in signal processing hardware comprising a digital signal processor and optional supporting electrical circuitry.
35. Method of evaluating perception intensity of an audio input signal according to claim 1 , wherein said method results in automatic control of electronic circuitry.
36. Perception intensity estimating device comprising an audio signal input for receiving an audio input signal and signal processing circuitry performing the following steps:
estimating a time variant distribution function on the basis of said audio input signal or a derivative thereof;
determining the perception intensity as at least one perception intensity estimate on the basis of said estimated time variant distribution function;
establishing at least two different partial representations of the audio input signal, establishing at least two different statistical functions on the basis of at least one of said different partial representations of said audio input signal; and
combining said determined statistical functions into a perception intensity representation by means of at least one non-linear signal processing.
37. Perception intensity estimating device according to claim 36 comprising monitoring means for displaying the estimated perception intensity.
38. Perception intensity estimating device according to claim 36 comprising control means for controlling connected electronic circuitry in response to the established perception intensity.
39. Method of evaluating perception intensity of an audio input signal comprising the steps of
receiving the audio input signal;
estimating a time variant distribution function on the basis of said audio input signal or a derivative thereof;
determining the perception intensity as at least one perception intensity estimate on the basis of said estimated time variant distribution function, wherein the determining the perception intensity is established on the basis of the estimated time variant distribution function according to at least one non-linear function, the non-linear function being established on the basis of adaptation data.
40. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said estimating of a time variant distribution function is referring to the audio input signal.
41. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said estimating of a time variant distribution function is made on the basis of a modified audio input signal.
42. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said audio input signal comprises a sequence of input samples.
43. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said perception intensity estimate comprises an output sample.
44. Method of evaluating perception intensity of an audio input signal according to claim 43 , wherein the determining of a perception intensity representative output sample is established on the basis of a weighted accumulation of at least two time variant distribution functions estimated at least two different times.
45. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said time variant distribution function is estimated by a shape description of a distribution function.
46. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said time variant distribution comprises an amplitude distribution function.
47. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said time variant distribution comprises a power distribution function.
48. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said time variant distribution comprises a sound intensity distribution function.
49. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said time variant distribution comprises a two-dimensional distribution function.
50. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein the determining of the perception intensity estimate is made on the basis of at least two time variant distribution functions estimated at least two different times.
51. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein an output sample is determined on the basis of a least two audio input samples.
52. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said at least one non-linear function is established by an artificial neural network.
53. Method of evaluating perception intensity of an audio input signal according to claim 52 , wherein said artificial neural network comprises a multilayer perceptron.
54. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said at least one non-linear function is established by means of polynomial fitting.
55. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said at least one non-linear function is established by means of splining.
56. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein the evaluation is established by a serial, a parallel or a combination thereof of at least two non-linear functions.
57. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said perception intensity comprises loudness.
58. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said perception intensity comprises sharpness, annoyance, airiness, punchiness, brilliance, presence, fatness, deepness or edginess or any combination thereof.
59. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein the estimation of said time variant distribution function is made on the basis of at least two different feature characterizing parameters of said audio input signal.
60. Method of evaluating perception intensity of an audio input signal according to claim 59 , wherein at least one of said at least two different feature characterizing parameters comprises a time variant statistical function.
61. Method of evaluating perception intensity of an audio input signal according to claim 59 , wherein at least one of said feature characterizing parameters comprises a central value over time, such as a mean value, an average value or a median.
62. Method of evaluating perception intensity of an audio input signal according to claim 59 , wherein at least one of said feature characterizing parameters comprises a measure of the spread over time, standard deviation, variance or inter quartile range.
63. Method of evaluating perception intensity of an audio input signal according to claim 59 , wherein preprocessing of the audio input signal is done prior to the establishment of said at least two feature characterizing parameters.
64. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said time variant distribution function is determined in a time window.
65. Method of evaluating perception intensity of an audio input signal according to claim 39 including the steps of
establishing at least two different partial representations of the audio input signal;
establishing at least two different statistical functions on the basis of at least one of said different partial representations of said audio input signal; and
combining said determined statistical functions into a loudness representation by means of at least one non-linear signal processing.
66. Method of evaluating perception intensity of an audio input according to claim 39 , wherein said audio input signal is modified on the basis of said evaluated perception intensity.
67. Method of evaluating perception intensity of an audio input signal according to claim 66 , wherein said modifying of the audio input signal is performed as a gain control of the complete or a part of the audio input signal.
68. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said audio input signal comprises a multichannel signal.
69. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein the perception intensity refers to a one-parameter evaluation of the audio input signal or a derivative thereof.
70. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein the audio input signal or a derivative thereof is evaluated with respect to two or more different types of perception intensity and combinations thereof.
71. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein said method is implemented in signal processing hardware, such as a digital signal processor and optional supporting electrical circuitry.
72. Method of evaluating perception intensity of an audio input signal according to claim 39 , wherein the method results in automatic control of electronic circuitry.
73. Perception intensity estimating device comprising an audio signal input for receiving an audio input signal and signal processing circuitry performing the following steps:
estimating a time variant distribution function on the basis of said audio input signal or a derivative thereof; and
determining the perception intensity as at least one perception intensity estimate on the basis of said estimated time variant distribution function;
determining the perception intensity as at least one perception intensity estimate on the basis of said estimated time variant distribution function,
wherein the determining the perception intensity is established on the basis of the estimated time variant distribution function according to at least one non-linear function, the non-linear function being established on the basis of adaptation data.
74. Perception intensity estimating device according to claim 73 comprising monitoring means for displaying the estimated perception intensity.
75. Perception intensity estimating device according to claim 73 comprising control means for controlling connected electronic circuitry in response to the established perception intensity.