Search for dissertations about: "Coding"

Showing result 1 - 5 of 542 swedish dissertations containing the word Coding.

  1. 1. Towards flexible audio coding

    University dissertation from Stockholm : Signaler, sensorer och system

    Author : Renat Vafin; KTH.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Audio coding; multistage coding; waveform coding; parametric coding; sinusoidal coding; Elektronik; TECHNOLOGY Electrical engineering; electronics and photonics Electronics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektronik;

    Abstract : 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. READ MORE

  2. 2. On error-robust source coding with image coding applications

    University dissertation from Stockholm : Signaler, sensorer och system

    Author : Tomas Andersson; KTH.; [2006]
    Keywords : source coding; channel coding; joint source-channel coding; multiple description coding; image coding; vector quantization; channel optimized vector quantization; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : This thesis treats the problem of source coding in situations where the encoded data is subject to errors. The typical scenario is a communication system, where source data such as speech or images should be transmitted from one point to another. A problem is that most communication systems introduce some sort of error in the transmission. READ MORE

  3. 3. Source-Channel Coding in Networks

    University dissertation from Stockholm : KTH

    Author : Niklas Wernersson; KTH.; [2008]
    Keywords : source coding; channel coding; joint source-channel coding; bandwidth expansion; distributed source coding; multiple description coding; soft decoding; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : The aim of source coding is to represent information as accurately as possible using as few bits as possible and in order to do so redundancy from the source needs to be removed. The aim of channel coding is in some sense the contrary, namely to introduce redundancy that can be exploited to protect the information when being transmitted over a nonideal channel. READ MORE

  4. 4. Voronoi-Based Coding

    University dissertation from Chalmers University of Technology

    Author : Erik Agrell; Chalmers tekniska högskola.; Chalmers University of Technology.; [1997]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Informationsteknik; Information technology; source coding; channel coding; Voronoi diagram; nearest neighbor search algorithm; complexity; vector quantization; lattice; index assignment; linear block code; soft-decision decoding; Gaussian channel; neighbor descent; asymptotic theory; computational geometry;

    Abstract : The performance of a digital communication system can generally be improved by increasing the number of variables being jointly coded. In this sense, it is desirable to have, e.g., higher-dimensional quantizers, longer channel codes, and more users in a multiple-access system. READ MORE

  5. 5. Source-channel coding for wireless networks

    University dissertation from Stockholm : KTH

    Author : Niklas Wernersson; KTH.; [2006]
    Keywords : Source coding; channel coding; joint source-channel coding; multiple description coding; soft decoding; permutation codes; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : The aim of source coding is to represent information as accurately as possible using as few bits as possible and in order to do so redundancy from the source needs to be removed. The aim of channel coding is in some sense the contrary, namely to introduce redundancy that can be exploited to protect the information when being transmitted over a nonideal channel. READ MORE