Title:
【発明の名称】有音検出装置および有音検出方法
Document Type and Number:
Japanese Patent JP3034279
Kind Code:
B2
Abstract:
PURPOSE:To obtain a satisfactory detection rate without being affected by an input level even in the environment of large background noise by discriminating an input signal for each frame unit by using a noise standard pattern and a sound standard pattern. CONSTITUTION:A feature vector calculator 1 calculates a predictive linear coefficient by using a Durbin method or the like for the unit of a frame. A feature vector X(n), which is estimated as noise by a noise block estimating device 2, is transferred to a noise standard pattern preparing device 7. The device 7 prepares the noise standard pattern. Based on the feature vector X(n) outputted from the feature vector calculator 1, a discriminating device 10 discriminates a sound block. By using the feature vector estimated as noise, the noise standard pattern is prepared and based on this noise standard pattern and the sound standard pattern, the discrimination of sound/noise is executed. Thus, the satisfactory detection rate can be obtained without being affected by the input level even in the environment of large background noise.
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Inventors:
Hitoki Satoh
Tsuneo Nitta
Tsuneo Nitta
Application Number:
JP17202890A
Publication Date:
April 17, 2000
Filing Date:
June 27, 1990
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G10L15/04; G10L25/78; H04J3/17; (IPC1-7): G10L11/02; G10L15/04; H04J3/17
Domestic Patent References:
| JP6148898A | ||||
| JP2282798A | ||||
| JP226640A | ||||
| JP348900A | ||||
| JP556512B2 |
Other References:
１９８９年電子情報通信学会春季全国大会 第３分冊 「Ｂ−３７２ ＡＴＭ通信のための音声セル化方式」ｐ．３−７８
１９９０年電子情報通信学会春季全国大会 第１分冊 「Ａ−２２８ 背景雑音への適応変換に基づく有音検出方式」ｐ．１−２２８
電子情報通信学会技術研究報告［通信］，Ｖｏｌ．８９，Ｎｏ．１３２，ＣＳ８９−３３「音声パケット通信のための有音検出方式」ｐ．６１−６６（１９８９年７月１９日発表）
１９９０年電子情報通信学会春季全国大会 第１分冊 「Ａ−２２８ 背景雑音への適応変換に基づく有音検出方式」ｐ．１−２２８
電子情報通信学会技術研究報告［通信］，Ｖｏｌ．８９，Ｎｏ．１３２，ＣＳ８９−３３「音声パケット通信のための有音検出方式」ｐ．６１−６６（１９８９年７月１９日発表）
Attorney, Agent or Firm:
Saichi Suyama