Sökning: "Predictive Coding"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden Predictive Coding.

  1. 1. Interframe quantization of spectrum parameters in speech coding

    Författare :Jan Lindén; Chalmers University of Technology; []
    Nyckelord :spectrum coding; memory vector quantization; interframe coding; speech coding; channel optimized vector quantization; linear predictive vector quantization; finite state vector quantization; line spectrum frequencies;

    Sammanfattning : .... LÄS MER

  2. 2. On codebook driven speech coding

    Författare :Anders Bergström; Chalmers University of Technology; []
    Nyckelord :Vector quantization VQ ; glottal CELP coders; code excited linear predictive CELP coders; Speech coding; vector excited linear predictive coders;

    Sammanfattning : .... LÄS MER

  3. 3. Source and Channel Coding for Audiovisual Communication Systems

    Författare :Moo Young Kim; Bastiaan Kleijn; Richard Heusdens; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telekommunikation; Information theory; high-rate theory; source coding; channel coding; quantization; Telekommunikation; Telecommunication; Telekommunikation;

    Sammanfattning : Topics in source and channel coding for audiovisual communication systems are studied. The goal of source coding is to represent a source with the lowest possible rate to achieve a particular distortion, or with the lowest possible distortion at a given rate. Channel coding adds redundancy to quantized source information to recover channel errors. LÄS MER

  4. 4. On Robust LPC-spectrum Coding and Vector Quantization

    Författare :Roar Hagen; Chalmers University of Technology; []
    Nyckelord :robustness against channel noise; LPC-spectrum coding; vector quantization; speech coding; linear mapping of a block code;

    Sammanfattning : Digital speech coding is concerned with representing a discrete-time speech signal with as few bits per second as possible without introducing annoying artifacts in the coded speech. Many modern speech coders are based on Linear Predictive Coding (LPC) which employ a source-filter model for speech production. LÄS MER

  5. 5. New predictive and diagnostic biomarkers for preeclampsia

    Författare :Ulrik Dolberg Anderson; Lund Obstetrik och gynekologi; []

    Sammanfattning : Abstract Preeclampsia is a serious pregnancy complication that affects 3-8% of all pregnancies leading to maternal- and fetal morbidity and mortality. The etiology is still not known in detail. Previous findings have shown an up regulation of the genes coding for fetal hemoglobin (HbF) in preeclamptic placentas. LÄS MER