JPWO2009078256A1 - 発音変動規則抽出装置、発音変動規則抽出方法、および発音変動規則抽出用プログラム - Google Patents
発音変動規則抽出装置、発音変動規則抽出方法、および発音変動規則抽出用プログラム Download PDFInfo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/06—Creation of reference templates; Training of speech recognition systems, e.g. adaptation to the characteristics of the speaker's voice
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/08—Speech classification or search
- G10L15/18—Speech classification or search using natural language modelling
- G10L15/183—Speech classification or search using natural language modelling using context dependencies, e.g. language models
- G10L15/187—Phonemic context, e.g. pronunciation rules, phonotactical constraints or phoneme n-grams
Abstract
Description
その ような しゅじゅつ を ほぼ まいにち おこない まし た
その ような しじつ を ほぼ まいんち おこない まし た
まいにち→まいにち 0.884(966/1093)
まいにち→まいんち 0.102(112/1093)
まいにち→まいち 0.012(13/1093)
まいにち→まんいち 0.002(2/1093)
となる。この結果は、標準形発音「まいにち」に対する変形発音の出現傾向に関する確率的な規則と解釈できる。発音変動計数部204は、上記結果を発音変動規則として出力する。
みなさん こんにちわ
発音を表す書き起こしであることから、「こんにちは」は「こんにちわ」と記述される。
Claims (20)
- 音声データを記憶する音声データ記憶手段と、
前記音声データの標準形発音を表す標準形発音データを記憶する標準形発音記憶手段と、
前記標準形発音データからサブワード言語モデルを生成するサブワード言語モデル生成手段と、
前記サブワード言語モデルを用いて前記音声データを認識する音声認識手段と、
前記音声認識手段が出力する認識結果と、前記標準形発音データとを比較して、これらの差分を抽出する差分抽出手段とを備える
発音変動規則抽出装置。 - 前記サブワード言語モデルの重み値を制御する言語モデル重み制御手段を更に備え、
前記言語モデル重み制御手段は、
複数の重み値を出力し、
前記音声認識手段は、
前記複数の重み値のそれぞれについて、前記音声データを認識する
請求の範囲1記載の発音変動規則抽出装置。 - 前記言語モデル重み制御手段は、
前記重み値を制御する際、あらかじめ定められた値の組に基づいて、所定の回数だけ前記重み値を更新する
請求の範囲2記載の発音変動規則抽出装置。 - 前記言語モデル重み制御手段は、
前記差分に応じて、前記重み値を更新することの有無を随時決定する
請求の範囲3記載の発音変動規則抽出装置。 - 前記言語モデル重み制御手段は、
前記差分が所定のしきい値よりも小さい場合に、前記重み値を減少させるように更新する
請求の範囲4記載の発音変動規則抽出装置。 - 前記言語モデル重み制御手段は、
前記差分が所定のしきい値よりも大きい場合に、前記重み値を増加させるように更新する
請求の範囲5記載の発音変動規則抽出装置。 - 前記差分抽出手段は、
前記差分を、前記認識結果と前記標準形発音データとの間の編集距離として計算する
請求の範囲2〜6いずれかに記載の発音変動規則抽出装置。 - 前記差分抽出手段は、
前記差分として、前記認識結果と前記標準形発音データとの相違箇所の文字列対と、前記認識結果が得られたときに前記音声認識手段が前記言語モデル重み制御手段から受け取ったサブワード言語モデルの重み値とを含む発音変動事例を抽出する
請求の範囲2〜7いずれかに記載の発音変動規則抽出装置。 - 前記発音変動事例から発音変動の確率的規則を生成する発音変動確率推定手段を更に備える
請求の範囲8記載の発音変動規則抽出装置。 - 前記発音変動確率推定手段は、
ある発音変動事例が観測されたときのサブワード言語モデルの重み値の大きさに応じて、前記ある発音変動事例の発現確率が高くなるように前記発音変動の確率的規則を生成する
請求の範囲9記載の発音変動規則抽出装置。 - 音声データの標準形発音を表す標準形発音データを記憶することと、
前記標準形発音データからサブワード言語モデルを生成することと、
前記サブワード言語モデルを用いて前記音声データを認識することと、
前記認識することによる認識結果と、前記標準形発音データとを比較して、これらの差分を抽出することとを具備する
発音変動規則抽出方法。 - 前記サブワード言語モデルの重み値を制御することを更に具備し、
前記制御することは、
複数の重み値を出力することを含み、
前記認識することは、
前記複数の重み値のそれぞれについて、前記音声データを認識することを含む
請求の範囲11記載の発音変動規則抽出方法。 - 前記制御することは、
前記重み値を制御する際、あらかじめ定められた値の組に基づいて、所定の回数だけ前記重み値を更新することと、
前記差分に応じて、前記重み値を更新することの有無を随時決定することと、
前記差分が所定のしきい値よりも小さい場合に、前記重み値を減少させるように更新することと、
前記差分が所定のしきい値よりも大きい場合に、前記重み値を増加させるように更新することとを更に含む
請求の範囲12記載の発音変動規則抽出方法。 - 前記抽出することは、
前記差分を、前記認識結果と前記標準形発音データとの間の編集距離として計算することと、
前記差分として、前記認識結果と前記標準形発音データとの相違箇所の文字列対と、前記認識結果が得られたときに受け取ったサブワード言語モデルの重み値とを含む発音変動事例を抽出することとを含む
請求の範囲13記載の発音変動規則抽出方法。 - 前記発音変動事例から発音変動の確率的規則を生成することを更に具備し、
前記確率的規則を生成することは、
ある発音変動事例が観測されたときのサブワード言語モデルの重み値の大きさに応じて、前記ある発音変動事例の発現確率が高くなるように前記発音変動の確率的規則を生成することを含む
請求の範囲14記載の発音変動規則抽出方法。 - 音声データを記憶する音声データ記憶手段と、
前記音声データの標準形発音を表す標準形発音データを記憶する標準形発音記憶手段と、
前記標準形発音データからサブワード言語モデルを生成するサブワード言語モデル生成手段と、
前記サブワード言語モデルを用いて前記音声データを認識する音声認識手段と、
前記音声認識手段が出力する認識結果と、前記標準形発音データとを比較して、これらの差分を抽出する差分抽出手段ととしてコンピュータを機能させるための
発音変動規則抽出用プログラム。 - 前記サブワード言語モデルの重み値を制御する言語モデル重み制御手段を更に備え、
前記言語モデル重み制御手段は、
複数の重み値を出力し、
前記音声認識手段は、
前記複数の重み値のそれぞれについて、前記音声データを認識する
請求の範囲16記載の発音変動規則抽出用プログラム。 - 前記言語モデル重み制御手段は、
前記重み値を制御する際、あらかじめ定められた値の組に基づいて、所定の回数だけ前記重み値を更新し、
前記差分に応じて、前記重み値を更新することの有無を随時決定し、
前記差分が所定のしきい値よりも小さい場合に、前記重み値を減少させるように更新し、
前記差分が所定のしきい値よりも大きい場合に、前記重み値を増加させるように更新する
請求の範囲17記載の発音変動規則抽出用プログラム。 - 前記差分抽出手段は、
前記差分を、前記認識結果と前記標準形発音データとの間の編集距離として計算し、
前記差分として、前記認識結果と前記標準形発音データとの相違箇所の文字列対と、前記認識結果が得られたときに前記音声認識手段が前記言語モデル重み制御手段から受け取ったサブワード言語モデルの重み値とを含む発音変動事例を抽出する
請求の範囲18記載の発音変動規則抽出用プログラム。 - 前記発音変動事例から発音変動の確率的規則を生成する発音変動確率推定手段を更に備え、
前記発音変動確率推定手段は、
ある発音変動事例が観測されたときのサブワード言語モデルの重み値の大きさに応じて、前記ある発音変動事例の発現確率が高くなるように前記発音変動の確率的規則を生成する
請求の範囲19記載の発音変動規則抽出用プログラム。
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