Patent EP0367569A2 successfully refreshed from Google Patents.
EP0367569A2
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EP
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Sound effect system
Assignee: Toshiba Corp
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Filing: 1989-10-31
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Granted: —
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Expires: 2009-10-31
Abstract
Abstract An audio signal processing apparatus for processing audio signal including an audio signal input circuit (116 - 118) into which the audio signals are input, an audio signal analyzer (143) which analyzes the input audio signals and generates an output control signal, a sound effect processor (121) which performs a prescribed sound effect processing on the input audio signals and outputs a resulting audio signal, a controller (142) which controls the sound effect processor (121) to optimize the sound effect processing in response to the control signal from the audio signal analyzer (143) and an audio signal output circuit (122 - 131) for outputting the resulting audio signal.
Inventors
- 👤 Akira Intellectual Property Division Sasaki
- 👤 Katsuyoshi Intellectual Property Division Suzuki
- 👤 Kazuyasu Intellectual Property Division Sakai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:07
CPC Classifications
G; G10; G10H; G10H3/00; H; H04; H04S; H04S7/00; H04S7/30; H04S7/305; H04S1/00; H04S1/007
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
121 words
An audio signal processing apparatus for processing audio signals. comprising an audio signal input means (116 - 118) into which the audio signals are input, a sound effect processing means (121) which performs a prescribed sound effect processing on the input audio signals and outputs a resulting audio signal and an audio signal output means (122 - 131) for outputting the resulting audio signal, CHARACTERIZED IN THAT the apparatus further comprises: an audio signal analysis means (143) which analyzes the input audio signals and generates an output control signal; and a control means (142) which controls the sound effect processing means (121) to optimize the sound effect processing in response to the control signal from the audio signal analysis means (143).
Claim 2
Dependent Claim
121 words
An audio signal processing apparatus for processing audio signals. comprising an audio signal input means (116 - 118) into which the audio signals are input, a sound effect processing means (121) which performs a prescribed sound effect processing on the input audio signals and outputs a resulting audio signal and an audio signal output means (122 - 131) for outputting the resulting audio signal, CHARACTERIZED IN THAT the apparatus further comprises: an audio signal analysis means (143) which analyzes the input audio signals and generates an output control signal; and a control means (142) which controls the sound effect processing means (121) to optimize the sound effect processing in response to the control signal from the audio signal analysis means (143).
Claim 3
Dependent Claim
69 words
An audio signal processing apparatus as claimed in claim 1, wherein the audio signal analysis means (143) comprises: a low frequency extracting means (154) which extracts low frequency signals from the audio signals; and a signal level comparing means (156) which compares the level of the low frequency signals extracted by the low frequency extracting means (154) with a preset prescribed level and outputs the result of the comparison.
Claim 4
Dependent Claim
141 words
An audio signal processing apparatus as claimed in claim 1, wherein the audio signal analysis means (143) comprises: a low frequency extracting means (157) which extracts low frequency signals from the audio signals; a first signal level fluctuation determining means (158) which determines the fluctuating level of the low frequency signals extracted by the low frequency extracting means (157) and outputs a first level determining signal; a high frequency component extracting means (159) which extracts high frequency component signals from the audio signals; a second signal level fluctuation determining means (160) which determines the fluctuating level of the high frequency component signals extracted by the high frequency component extracting means (159) and outputs a second level determining signal; and a signal level comparing means (162) which compares the first and second level determining signals and outputs the result of the comparison.
Claim 5
Dependent Claim
160 words
An audio signal processing apparatus as claimed in claim 1, wherein the audio signal analysis means (143) comprises: an intermediate frequency component extracting means (175) which extracts intermediate frequency component signals from the audio signals; a first signal level fluctuation determining means (176) which determines the fluctuating level of the intermediate frequency component signals extracted by the intermediate frequency extracting means (175) and outputs a first level fluctuation determining signal; a high frequency component extracting means (177) which extracts high frequency component signals from the audio signals; and a second signal level fluctuation determining means (178) which determines the fluctuating level of the high frequency component signals extracted by the high frequency component extracting means (177) and outputs a second level fluctuation determining signal; and a signal level comparing means (179) which compares the first and second level fluctuation determining signals from the first and second signal level fluctuation determining means (176, 178) and outputs the result of the comparison.
Claim 6
Dependent Claim
160 words
An audio signal processing apparatus as claimed in claim 1, wherein the audio signal analysis means (143) comprises: an intermediate frequency component extracting means (175) which extracts intermediate frequency component signals from the audio signals; a first signal level fluctuation determining means (176) which determines the fluctuating level of the intermediate frequency component signals extracted by the intermediate frequency extracting means (175) and outputs a first level fluctuation determining signal; a low frequency component extracting means (181) which extracts low frequency component signals from the audio signals; and a second signal level fluctuation determining means (178) which determines the fluctuating level of the low frequency component signals extracted by the low frequency component extracting means (181) and outputs a second level fluctuation determining signal; and a signal level comparing means (179) which compares the first and second level fluctuation determining signals from the first and second signal level fluctuation determining means (176, 181) and outputs the result of the comparison.
Claim 7
Dependent Claim
109 words
An audio signal processing apparatus as claimed in claim 1 wherein: multiple channel audio signals are input independently into the audio signal processing means; the audio signal analysis means (143) is provided with a signal level difference determining means (149) which determines the difference in signal level between the multiple channel audio signals and a signal level comparing means (174) which compares the determined signal level difference with a preset prescribed level and outputs the result of the comparison; and the sound effect processing means (121) performs the sound effect processing on the multiple channel audio signals in response to the output of the signal level comparing means (174).
Claim 8
Dependent Claim
26 words
An audio signal processing apparatus as claimed in any preceding claim wherein the sound effect processing means (121, 184) adjusts the gain of the audio signals.
Claim 9
Dependent Claim
27 words
An audio signal processing apparatus as claimed in claim 7 wherein the sound effect processing means (121, 184, 182) changes the gain of the audio signals gradually.
Claim 10
Dependent Claim
27 words
An audio signal processing apparatus as claimed in any preceding claim wherein the sound effect processing means (121, 183) adjusts the delay time of the audio signals.
Claim 11
Dependent Claim
28 words
An audio signal processing apparatus as claimed in claim 9 wherein the sound effect processing means (121, 183, 182) changes the delay time of the audio signals gradually.
Claim 12
Dependent Claim
40 words
An audio signal processing apparatus as claimed in claim 9 wherein the sound effect processing means (121, 183) adjusts the delay time of the audio signals to provide either a long or a short reverberation time of the audio signal.
Claim 13
Dependent Claim
27 words
An audio signal processing apparatus as claimed in any preceding claim wherein the sound effect processing means (121, 185) adjusts the frequency characteristic of the audio signals.
Claim 14
Dependent Claim
56 words
An audio signal processing apparatus as claimed in claim 12 wherein the sound effect processing means (121, 185) adjusts the frequency characteristic of the audio signals by dividing the audio signal into low frequency signal and high frequency component signal and adjusting the gain of either or both of the low and high frequency component signals.
Claim 15
Dependent Claim
25 words
An audio signal processing apparatus as claimed in any preceding claim wherein the sound effect processing means (121) adjusts the phase of the audio signals.
Claim 16
Dependent Claim
27 words
An audio signal processing apparatus as claimed in claim 14 wherein the sound effect processing means (121) adjusts the phase of the audio signals on multiple channels.
Claim 17
Dependent Claim
36 words
An audio signal processing apparatus as claimed in any preceding claim wherein the sound effect processing means (121) adjusts one or more of the gain, delay time, frequency characteristic, and phase of the input audio signals.
Claim 18
Dependent Claim
55 words
An audio signal processing apparatus as claimed in any preceding claim, comprising: a signal level detecting means (151) which detects the level of the audio signal; and a signal level control means (152) which controls the signal level of the audio signal in response to the level detected by the signal level detecting means (151).
Claim 19
Dependent Claim
31 words
An audio signal processing apparatus as claimed in any preceding claim, wherein the audio signal analysis means (143) comprises a delay means (183) which acts to delay the output control signal.
Claim 20
Dependent Claim
134 words
An audio signal processing apparatus for processing audio signal comprising an audio signal input means (116 - 118) into which the audio signals are input, a video signal input means (134, 135) into which video signals are input, a sound effect processing means (121) which performs a prescribed sound effect processing on the input audio signals and outputs a resulting audio signal and an audio signal output means (122 - 131) for outputting the resulting audio signal, CHARACTERIZED IN THAT, the apparatus further comprises: a video signal analysis means (143) which analyzes the input video signals and generates an output control signal; and a control means (142) which controls the sound effect processing means (121) to optimize the sound effect processing in response to the control signal from the video signal analysis means (143).
Claim 21
Dependent Claim
134 words
An audio signal processing apparatus for processing audio signal comprising an audio signal input means (116 - 118) into which the audio signals are input, a video signal input means (134, 135) into which video signals are input, a sound effect processing means (121) which performs a prescribed sound effect processing on the input audio signals and outputs a resulting audio signal and an audio signal output means (122 - 131) for outputting the resulting audio signal, CHARACTERIZED IN THAT, the apparatus further comprises: a video signal analysis means (143) which analyzes the input video signals and generates an output control signal; and a control means (142) which controls the sound effect processing means (121) to optimize the sound effect processing in response to the control signal from the video signal analysis means (143).
Claim 22
Dependent Claim
149 words
An audio signal processing apparatus as claimed in claim 19, wherein the video signal analysis means (143) comprises: a low frequency extracting means (195) which extracts low frequency signals from the luminance signal contained in the video signals; a first signal level determining means (197) which determines the level of the low frequency signals extracted by the low frequency extracting means (195) and outputs a first level determining signal; a high frequency component extracting means (196) which extracts high frequency component signals from the luminance signal and outputs a second level determining signal; a second signal level determining means (198) which determines the level of the high frequency component signals extracted by the high frequency component extracting means (196) and outputs a second level determining signal; and a signal level comparing means (199) which compares the first and second level determining signals and outputs the result of the comparison.
Claim 23
Dependent Claim
158 words
An audio signal processing apparatus for processing audio signal comprising an audio signal input means (116 - 118) into which the audio signals are input, a video signal input means (134, 135) into video signals are input, a sound effect processing means (121) which performs a prescribed sound effect processing on the input audio signals and outputs a resulting audio signal and an audio signal output means (122 - 131) for outputting the resulting audio signal, CHARACTERIZED IN THAT the apparatus further comprises: an audio signal analysis means (143) which analyzes the input audio signals and generates a first output control signal; a video signal analysis means (143) which analyzes the input video signals and generates a second output control signal; and a control means (142) which controls the sound effect processing means (121) to optimize the sound effect processing in response to the first and second control signals from the audio and video signal analysis means (121).
Claim 24
Dependent Claim
158 words
An audio signal processing apparatus for processing audio signal comprising an audio signal input means (116 - 118) into which the audio signals are input, a video signal input means (134, 135) into video signals are input, a sound effect processing means (121) which performs a prescribed sound effect processing on the input audio signals and outputs a resulting audio signal and an audio signal output means (122 - 131) for outputting the resulting audio signal, CHARACTERIZED IN THAT the apparatus further comprises: an audio signal analysis means (143) which analyzes the input audio signals and generates a first output control signal; a video signal analysis means (143) which analyzes the input video signals and generates a second output control signal; and a control means (142) which controls the sound effect processing means (121) to optimize the sound effect processing in response to the first and second control signals from the audio and video signal analysis means (121).
References Cited (Backward Citations)
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