Sökning: "variable rate coding"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden variable rate coding.

  1. 1. Speech coding from a variable rate perspective

    Författare :Thomas Eriksson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; CELP; variable rate coding; speech coding;

    Sammanfattning : .... LÄS MER

  3. 2. Vector Quantization in Speech Coding. Variable Rate, Memory and Lattice Quantization

    Författare :Thomas Eriksson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This dissertation focuses on different quantization methods in speech coding. Variable rate quantization has the potential to substantially reduce the bit rate requirements in speech coding. LÄS MER

  4. 3. Bounds on the maximum coding rate of multiple-access channels and feedback channels

    Författare :Rahul Devassy; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : We provide upper and lower bounds on the coding rate of multiple-access channels (MACs) and feedback channels.Traditional MACs have been extensively studied under the assumption of availability of perfect channel state information (CSI).In Paper A we relax this assumption for a Rayleigh block-fading MAC and provide bounds on the sum-rate capacity. LÄS MER

  5. 4. Coding, Modulation and Multiuser Decoding for DS-CDMA Systems

    Författare :Tony Ottosson Gadd; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The general trend both in wireless and fixed network communication systems is flexibility in services, data rates, desired delay and performance. Future systems should not be designed for specific services but be more general and allow for a multitude of services, both now existing and those not yet invented. LÄS MER

  7. 5. Rate, Reliability and Secrecy Performance Analysis and Optimization for Millimeter WaveCommunications

    Författare :Shaocheng Huang; Ming Xiao; Mikael Skoglund; Marco Renzo; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : With the fast development of electronic devices and computer science, various emerging applications (e.g., virtual and augmented reality, ultra-high-definition three-dimensional video, autonomous driving, big data analysis, etc. LÄS MER