SPEECH ARTICULATION IMPROVING DEVICE AND NOISE LEVEL ESTIMATION METHOD THEREOF
PROBLEM TO BE SOLVED: To provide "a speech articulation improving device and a noise level estimation method thereof" in which even when noise level abruptly varies, a suitable correction gain can be set. SOLUTION: When the noise level is in a stationary state, a switch 15 is switched to t...
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| creator | MARUMOTO TORU |
| description | PROBLEM TO BE SOLVED: To provide "a speech articulation improving device and a noise level estimation method thereof" in which even when noise level abruptly varies, a suitable correction gain can be set. SOLUTION: When the noise level is in a stationary state, a switch 15 is switched to the side of a terminal (a) so as to output an average value of the noise level calculated by an averaging processing section 12 as a current estimated noise level, and when a determination processing section 14 detects that difference between an instantaneous value of the estimated noise level and the average value thereof is larger than a threshold continuously for a predetermined time, the switch 15 is switched to the side of a terminal (b) so as to output the instantaneous value of the noise level as a current estimated noise value. Thus, when the noise level abruptly varies, the estimated noise level output from a noise level estimation section 7 to a gain correcting section 8 can be switched from the average value to the instantaneous value, so that follow-up ability of noise level estimation in the abrupt variation in noise level can be enhanced. COPYRIGHT: (C)2008,JPO&INPIT |
| format | Patent |
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SOLUTION: When the noise level is in a stationary state, a switch 15 is switched to the side of a terminal (a) so as to output an average value of the noise level calculated by an averaging processing section 12 as a current estimated noise level, and when a determination processing section 14 detects that difference between an instantaneous value of the estimated noise level and the average value thereof is larger than a threshold continuously for a predetermined time, the switch 15 is switched to the side of a terminal (b) so as to output the instantaneous value of the noise level as a current estimated noise value. Thus, when the noise level abruptly varies, the estimated noise level output from a noise level estimation section 7 to a gain correcting section 8 can be switched from the average value to the instantaneous value, so that follow-up ability of noise level estimation in the abrupt variation in noise level can be enhanced. 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SOLUTION: When the noise level is in a stationary state, a switch 15 is switched to the side of a terminal (a) so as to output an average value of the noise level calculated by an averaging processing section 12 as a current estimated noise level, and when a determination processing section 14 detects that difference between an instantaneous value of the estimated noise level and the average value thereof is larger than a threshold continuously for a predetermined time, the switch 15 is switched to the side of a terminal (b) so as to output the instantaneous value of the noise level as a current estimated noise value. Thus, when the noise level abruptly varies, the estimated noise level output from a noise level estimation section 7 to a gain correcting section 8 can be switched from the average value to the instantaneous value, so that follow-up ability of noise level estimation in the abrupt variation in noise level can be enhanced. 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SOLUTION: When the noise level is in a stationary state, a switch 15 is switched to the side of a terminal (a) so as to output an average value of the noise level calculated by an averaging processing section 12 as a current estimated noise level, and when a determination processing section 14 detects that difference between an instantaneous value of the estimated noise level and the average value thereof is larger than a threshold continuously for a predetermined time, the switch 15 is switched to the side of a terminal (b) so as to output the instantaneous value of the noise level as a current estimated noise value. Thus, when the noise level abruptly varies, the estimated noise level output from a noise level estimation section 7 to a gain correcting section 8 can be switched from the average value to the instantaneous value, so that follow-up ability of noise level estimation in the abrupt variation in noise level can be enhanced. COPYRIGHT: (C)2008,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACOUSTICS BASIC ELECTRONIC CIRCUITRY CONTROL OF AMPLIFICATION ELECTRICITY MUSICAL INSTRUMENTS PHYSICS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION |
| title | SPEECH ARTICULATION IMPROVING DEVICE AND NOISE LEVEL ESTIMATION METHOD THEREOF |
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