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Speech processing is the study of speech signals and the processing methods of these signals.The signals are usually processed in a digital representation whereby speech processing can be seen as the intersection of digital signal processing and natural language processing.

• Speech recognition, which deals with analysis of the linguistic content of a speech signal.
• Speaker recognition, where the aim is to recognize the identity of the speaker.
• Enhancement of speech signals, e.g. audio noise reduction,
  
• Speech coding, a specialized form of data compression, is important in the telecommunication area.
  
• Voice analysis for medical purposes, such as analysis of vocal loading and dysfunction of the vocal cords.
  
• Speech synthesis: the artificial synthesis of speech, which usually means computer generated speech.
  
• Speech enhancement: enhancing the perceptual quality of speech signal by removing the destructive effects of noise, limited capacity recording equipment, impairments, etc.

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