• Channel selection and reverberation-robust automatic speech recognition 

    Wolf, Martin (Universitat Politècnica de Catalunya, 2013-11-11)
    Tesi
    Accés obert
    If speech is acquired by a close-talking microphone in a controlled and noise-free environment, current state-of-the-art recognition systems often show an acceptable error rate. The use of close-talking microphones, however, ...
  • Channel selection measures for multi-microphone speech recognition 

    Nadeu Camprubí, Climent; Wolf, Martin (2014-02-01)
    Article
    Accés restringit per política de l'editorial
    Automatic speech recognition in a room with distant microphones is strongly affected by noise and reverberation. In scenarios where the speech signal is captured by several arbitrarily located microphones the degree of ...
  • Channel selection using N-best hypothesis for multi-microphone ASR 

    Wolf, Martin; Nadeu Camprubí, Climent (2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    If speech is captured by several arbitrarily-located microphones in a room, the degree of distortion by noise and reverberation may vary strongly from one channel to another. Channel selection for automatic speech recognition ...
  • Extension of the remos concept to frequency-filtering-based features for reverberation-robust speech recognition 

    Maas, Roland; Wolf, Martin; Sehr, Armin; Nadeu Camprubí, Climent; Kellermann, Walter (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The introduction of partly decorrelated features into the REMOS (REverberationMOdeling for Speech recognition) concept for distant-talking speech recognition [1] is discussed. REMOS combines a hidden Markov model (HMM), ...
  • Model-based processing for acoustic scene analysis 

    Nadeu Camprubí, Climent; Chakraborty, Rupayan; Wolf, Martin (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The analysis of acoustic scenes requires several functionalities, being perhaps recognition (speech, speaker, other acoustic events) and spatial localization the two most relevant ones. For a reduced invasiveness, ...
  • On the potential of channel selection for recognition of reverberated speech with multiple microphones 

    Wolf, Martin; Nadeu Camprubí, Climent (2010)
    Text en actes de congrés
    Accés obert
    The performance of ASR systems in a room environment with distant microphones is strongly affected by reverberation. As the degree of signal distortion varies among acoustic channels (i.e. microphones), the recognition ...