JP5366169B2 - 音声認識システム及び音声認識システム用プログラム - Google Patents
音声認識システム及び音声認識システム用プログラム Download PDFInfo
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/04—Segmentation; Word boundary detection
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
- G10L15/065—Adaptation
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Description
ベースライン 10個 74.1%
本発明実施 3個 77.9%
上記の結果のベースラインは、未知語の追加登録と発音変形追加登録をしない従来の手法を用いた結果である。そして本発明の実施は、未知語の追加登録と新たな発音を追加登録することにより高精度化した音声認識辞書を用いて音声認識を行った場合の結果である。上記結果から、未知語数が削減され、認識率も改善されていることがわかる。また、同一番組のポッドキャストでは、同じ話者が発生することが多く、決まった言い回しや発音パターンが日々繰り返されることもあるため、本発明が特に有効に働くことが判った。
2 音声認識手段
3 音声認識実行手段
5 音声認識辞書
7 テキストデータ記憶手段
9 単語訂正手段
11 認識結果表示手段
13 音素列変換手段
15 音素列部分抽出手段
16 発音決定手段
17 追加登録手段
19 話者認定手段
21 分野認定手段
23 辞書選択手段
Claims (9)
- 単語と該単語に対する1以上の音素からなる1以上の発音とが組みになった単語発音データが、多数集められて構成された音声認識辞書を利用して、音声データをテキストデータに変換し且つ、前記テキストデータに含まれる各単語に対応する前記音声データ中の単語区間の開始時刻と終了時刻を前記テキストデータに付加する機能を有する音声認識手段と、
前記音声認識手段から得た前記テキストデータ中の各単語に対して競合候補を提示して、前記競合候補中に正しい単語があるときには、前記競合候補から前記正しい単語を選択により訂正することを許容する単語訂正手段と、
前記音声データを音素単位で認識して複数の音素から構成される音素列に変換し且つ、前記音素列に含まれる各音素に対応する前記音声データ中の各音素単位の開始時刻と終了時刻を前記音素列に付加する機能を有する音素列変換手段と、
前記音素列中から、前記単語訂正手段により訂正された単語の単語区間の前記開始時刻から前記終了時刻までに対応する区間内に存在する1以上の音素からなる音素列部分を抽出する音素列部分抽出手段と、
前記音素列部分を前記単語訂正手段により訂正された訂正後の単語に対する発音と定める発音決定手段と、
前記訂正後の単語が、前記音声認識辞書に既に登録されている既登録単語であることを判定すると、前記既登録単語の別の発音として、前記発音決定手段が決定した前記音素列部分からなる発音を追加登録する追加登録手段とを有する音声認識システムであって、
前記単語訂正手段は、前記競合候補中に正しい単語がないときには、訂正対象の単語をマニュアル入力により訂正することを許容し、
前記追加登録手段は、前記訂正後の単語が、前記音声認識辞書に登録されていないことを判定すると、前記訂正後の単語と前記発音決定手段が決定した前記音素列部分からなる前記発音とを組み合わせて新たな発音単語データとして前記音声認識辞書に追加登録することを特徴とする音声認識システム。 - 前記音声認識手段は、前記追加登録手段が新たな追加登録を行うと、前記テキストデータ中でまだ訂正が行われていない未訂正部分に対応する音声データを再度音声認識することを特徴とする請求項1に記載の音声認識システム。
- 前記音声データから話者のタイプを認定する話者認定手段と、
話者のタイプに合わせて予め用意した複数の音声認識辞書から、前記話者認定手段により認定した話者のタイプに対応した音声認識辞書を音声認識手段で使用する音声認識辞書として選択する辞書選択手段とを更に備えている請求項1または2に記載の音声認識システム。 - 前記音声データから話されている内容の分野を認定する分野認定手段と、
複数の分野に合わせて予め用意した複数の音声認識辞書から、前記分野認定手段により認定した分野に対応した音声認識辞書を音声認識手段で使用する音声認識辞書として選択する辞書選択手段とを更に備えている請求項1または2に記載の音声認識システム。 - 前記音素列変換手段は、音素タイプライタである請求項1に記載の音声認識システム。
- コンピュータを、
単語と該単語に対する1以上の音素からなる1以上の発音とが組みになった単語発音データが、多数集められて構成された音声認識辞書を利用して、音声データをテキストデータに変換し且つ、前記テキストデータに含まれる各単語に対応する前記音声データ中の単語区間の開始時刻と終了時刻を前記テキストデータに付加する機能を有する音声認識手段と、
前記音声認識手段から得た前記テキストデータ中の各単語に対して競合候補を提示して、前記競合候補中に正しい単語があるときには、前記競合候補から前記正しい単語を選択により訂正することを許容し、前記競合候補中に正しい単語がないときには、訂正対象の単語をマニュアル入力により訂正することを許容する単語訂正手段と、
前記音声データを音素単位で認識して複数の音素から構成される音素列に変換し且つ、前記音素列に含まれる各音素に対応する前記音声データ中の各音素単位の開始時刻と終了時刻を前記音素列に付加する機能を有する音素列変換手段と、
前記音素列中から、前記単語訂正手段により訂正された単語の単語区間の前記開始時刻から前記終了時刻までに対応する区間内に存在する1以上の音素からなる音素列部分を抽出する音素列部分抽出手段と、
前記音素列部分を前記単語訂正手段により訂正された訂正後の単語に対する発音と定める発音決定手段と、
前記訂正後の単語が、前記音声認識辞書に登録されていないことを判定すると、前記訂正後の単語と前記発音決定手段が決定した前記音素列部分からなる前記発音とを組み合わせて新たな発音単語データとして前記音声認識辞書に追加登録し、前記訂正後の単語が、前記音声認識辞書に既に登録されている既登録単語であることを判定すると、前記既登録単語の別の発音として、前記発音決定手段が決定した前記音素列部分からなる前記発音を追加登録する追加登録手段として機能させるための音声認識システム用プログラム。 - 前記音声認識手段は、前記追加登録手段が新たな追加登録を行うと、前記テキストデータ中でまだ訂正が行われていない未訂正部分に対応する音声データを再度音声認識することを特徴とする請求項6に記載の音声認識システム用プログラム。
- 前記コンピュータを、
前記音声データから話者のタイプを認定する話者認定手段と、
話者のタイプに合わせて予め用意した複数の音声認識辞書から、前記話者認定手段により認定した話者のタイプに対応した音声認識辞書を音声認識手段で使用する音声認識辞書として選択する辞書選択手段として機能させるための請求項6または7に記載の音声認識システム用プログラム。 - 前記コンピュータを、
前記音声データから話されている内容の分野を認定する分野認定手段と、
複数の分野に合わせて予め用意した複数の音声認識辞書から、前記分野認定手段により認定した分野に対応した音声認識辞書を音声認識手段で使用する音声認識辞書として選択する辞書選択手段として機能させるための請求項6または7に記載の音声認識システム用プログラム。
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