Sökning: "spectrum coding"

Visar resultat 1 - 5 av 57 avhandlingar innehållade orden spectrum coding.

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

    Författare :Jan Lindén; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 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

  3. 2. Quantization of speech parameters : some studies in glottal pulse and spectrum coding

    Författare :Jan Skoglund; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; glottal codebook; glottal source modeling; spectrum coding; vector quantization; speech coding; memory vector quantization; excitation coding;

    Sammanfattning : .... LÄS MER

  4. 3. On speech spectrum coding : interframe memory and perception

    Författare :Fredrik Nordén; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; speech coding; memory based quantization; distortion measure; vector quantization; spectrum coding; speech perception;

    Sammanfattning : .... LÄS MER

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

    Författare :Roar Hagen; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 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

  7. 5. Smart Cooperation with Network Coding in Hierarchical Wireless Networks

    Författare :Nan Li; Lars Kildehöj Rasmussen; Daniel Lucani; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wireless communications; Hierarchical networks; 5G; Cognitive radio; Internet of Things; Cooperative communications; Spectrum sharing; Network coding; Optimization; Performance analysis.; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : To achieve more dynamic, efficient and intelligent use of the scarce wireless spectrum resource, the concept of cooperation has been formalized into several hierarchical network models in future mobile networks. Cooperative communications, such as relaying, can potentially increase communication efficiency and spectrum utilization due to the broadcast nature of wireless networks, and may lead to a better support for diverse communication modes with flexible spectrum sharing. LÄS MER