Speech information processing

Japanese: 音声情報処理 - おんせいじょうほうしょり
Speech information processing
A technology that treats human voice as signal data and uses computers to perform information processing such as analysis, conversion, and synthesis. Specific topics include voice frequency analysis, voice recognition, voice synthesis, voice information compression, and efficient transmission and recording of voice information signals. Research into voice information processing began in 1939 when Bell Labs in the United States developed the vocoder, a device for encoding and decoding voice signals, and made great strides in the 1970s when it became possible to sample and digitize analog voice signals. Voice synthesis and voice compression have become fully practical with the advancement of digital signal processing hardware and software technology, but voice recognition has not yet been put to practical use due to issues such as the diversity of human voices and environmental noise.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
ヒトの音声を信号データとして扱い,コンピュータを用いて分析,変換,合成などの情報処理を行なう技術。音声の周波数分析,音声認識,音声合成,音声情報の圧縮,音声情報信号の効率的伝送・記録などが具体的な内容である。音声情報処理の研究は,1939年アメリカ合衆国のベル研究所が音声信号の符号化・復号化装置であるボコーダを開発したことに始まり,1970年代にアナログ信号である音声をサンプリングしデジタル化できるようになったことで大きく進展した。音声合成や音声圧縮などは,デジタル信号処理のハードウェア,ソフトウェア技術の進歩に伴い十分に実用化されているが,音声認識については,ヒト音声の多様性や環境雑音などの問題があり,実用化にはいたっていない。

出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報

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