| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
In order to maintain speech communication in noisy environments, a new speech enhancement method using parameter estimation between frequency subbands is developed. This method divides a speech signal into a low subband signal and a high subband signal. While the low subband signal which has higher SNR is enhanced by the conventional method, the high subband signal which has lower SNR is enhanced using information obtained from low subband signal.
The line spectrum pairs (LSPs) are employed as feature parameters of subband signals. The low subband LSPs are transformed into the high subband LSPs by using the relation between two subbands which was learned preliminarily.
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