Sökning: "sinusoidal coding"

Hittade 4 avhandlingar innehållade orden sinusoidal coding.

  1. 1. Towards flexible audio coding

    Författare :Renat Vafin; Bastiaan Kleijn; Juergen Herre; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Audio coding; multistage coding; waveform coding; parametric coding; sinusoidal coding; Elektronik; Electronics; Elektronik;

    Sammanfattning : thesis is about audio coding and improving flexibility thereof. Audio coding is used to reduce the bit rate needed to represent audio signals in digital format. When the available bit rate is low, parametric coding methods that use models to describe perceptually-important features of audio signals have shown their efficiency. LÄS MER

  2. 2. Coding Speech for Packet Networks

    Författare :Jonas Lindblom; Chalmers University of Technology; []
    Nyckelord :packet loss concealment; voice over IP; speech coding; harmonic modeling; vector quantization; sinusoidal modeling; Gaussian mixture modeling; bounded support; frame erasure; variable dimension;

    Sammanfattning : The topic of this thesis is speech coding for packet networks. Problems related to the use of packet networks for voice communication are addressed. Real-time voice communication is for example very delay sensitive; if the total end-to-end delay in a telephone session grows large, it is perceived as annoying. LÄS MER

  3. 3. Packetized speech transmission - combatting the packet loss problem

    Författare :Jonas Lindblom; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bounded support; voice over packet packetized speech; spectrum prediction; Gaussian mixture modeling; frame erasure; speech coding; packet loss concealment; sinusoidal modeling;

    Sammanfattning : .... LÄS MER

  4. 4. Evolution of Membrane Bound Proteins and their Ligands : The Melanocortin (MC) Receptor Inverse Agonists AgRP2, ASIP2, Drug/Metabolite Transporters, and SPNS1

    Författare :Åke Västermark; Helgi Schiöth; Arne Elofsson; Uppsala universitet; []
    Nyckelord :;

    Sammanfattning : Integral membrane proteins play a key role hormonal and neuronal signaling. Transmembrane helix (TM) proteins form about 27% of the human proteome. Furthermore, 44% of the human drug targets are receptors, and 19% of these are seven-transmembrane domain receptors (GPCRs), which constitute 4% of the entire protein-coding genome. LÄS MER