Sökning: "Voice Active Detection"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Voice Active Detection.

  1. 1. Speaker Diarization System for Call-center data

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Yi Li; [2020]
    Nyckelord :MFCC-vector Speaker Diarization; Speaker Verification; Voice Active Detection; Gaussian Mixture Model; Hierarchy Clustering; MFCC-vektor Högtalardarisering; Högtalarverifiering; Röstaktiv detektering; Gaussisk blandningsmodell; Hierarkikluster;

    Sammanfattning : To answer the question who spoke when, speaker diarization (SD) is a critical step for many speech applications in practice. The task of our project is building a MFCC-vector based speaker diarization system on top of a speaker verification system (SV), which is an existing Call-centers application to check the customer’s identity from a phone call. LÄS MER

  3. 2. The Potential of Visual Features : to Improve Voice Recognition Systems in Vehicles Noisy Environment

    Master-uppsats, Högskolan i Halmstad/Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

    Författare :Ramtin Jafari Moghadamfard; Saeid Payvar; [2014]
    Nyckelord :voice recognition; lip motion; optical flow;

    Sammanfattning : Multimodal biometric systems have been subject of study in recent decades, theirunique characteristic of Anti spoofing and liveness detection plus ability to deal withaudio noise made them technology candidates for improving current systems such asvoice recognition, verification and identification systems.In this work we studied feasibility of incorporating audio-visual voice recognitionsystem for dealing with audio noise in the truck cab environment. LÄS MER

  4. 3. Integrated Speech Enhancement Technique for Hands-free Mobile Phones

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :ANEESH KALUVA; [2013]
    Nyckelord :Beamformer; Speech enhancement; Hands-free communication; Spectral subtraction; anechoic; Noise suppression;

    Sammanfattning : This thesis investigates the systems for hands-free mobile communication. In hands-free communication, there are various kinds of disturbances in the microphone reception due to the distance between the source and the receiver. The disturbances are mainly background noise and reverberation. LÄS MER

  5. 4. Methods for Improving Voice Activity Detection in Communication Services

    Master-uppsats, Institutionen för informationsteknologi

    Författare :Amardeep Amardeep; [2013]
    Nyckelord :;

    Sammanfattning : A video conferencing application has to display only active sites due to limited display area that are identified using voice activity detector  (VAD) and maintain a list of the most vocally active sites. In a typical video conferencing room there will be people typing on their computers or laptops and this can cause problem when the VAD classifies the keyboard typing signals as speech activity even there is nobody talking in the room. LÄS MER

  7. 5. An Ontological Approach to SIP DoS Detection

    Kandidat-uppsats, Fakulteten för ekonomi, kommunikation och IT

    Författare :Anja Fischer; Zak Blacher; [2010]
    Nyckelord :SIP; VoIP; DoS; Denial of Service; Ontology;

    Sammanfattning : Traditional public switched telephone networks (PSTN) are replaced more and more by VoIP services these days.  Although it is good for saving costs, the disadvantage of this development is that VoIP networks are less secure than the traditional  way of transmitting voice. LÄS MER