Search for dissertations about: "efficient coding"

Showing result 11 - 15 of 141 swedish dissertations containing the words efficient coding.

  2. 11. Link Reliability in Cooperative Relaying Using Network Coding

    Author : Tafzeel ur Rehman Ahsin; Slimane Ben Slimane; Ove Edfors; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cooperative Communications; Network Coding; Multiple Access Relay Channel; Telecommunication; Telekommunikation; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Abstract : Demand for high data rates is increasing rapidly for future wireless systems.This trend is due to the increase in the number of mobile subscribers that need bandwidth hungry multimedia applications anywhere, anytime. Fourth generation cellular systems like IMT-advanced are being developed to meet these requirements. READ MORE

  4. 12. Very low bitrate facial video coding : based on principal component analysis

    Author : Ulrik Söderström; Haibo Li; Umeå universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Image processing; Video processing; Very low bitrate coding; Other electrical engineering; electronics and photonics; Övrig elektroteknik; elektronik och fotonik;

    Abstract : This thesis introduces a coding scheme for very low bitrate video coding through the aid of principal component analysis. Principal information of the facial mimic for a person can be extracted and stored in an Eigenspace. Entire video frames of this persons face can then be compressed with the Eigenspace to only a few projection coefficients. READ MORE

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

    Author : Nan Li; Lars Kildehöj Rasmussen; Daniel Lucani; KTH; []
    Keywords : 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;

    Abstract : 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. READ MORE

  6. 14. Quantization, Perception and Speech Coding

    Author : Fredrik Nordén; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This thesis is about compression of speech signals, a research area known as speech coding. The aim of a speech coder is to provide efficient digital representations of speech signals, required in digital transmission and storage systems. Contemporary speech coding algorithms typically separate the speech signal into sets of parameters. READ MORE

  7. 15. Energy Efficient and Programmable Architecture for Wireless Vision Sensor Node

    Author : Muhammad Imran; Mattias O’ Nils; Bernhard Rinner; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wireless Vision Sensor Node; Smart camera; Wireless Vision Sensor Networks; Architecture; Video coding.;

    Abstract : Wireless Vision Sensor Networks (WVSNs) is an emerging field which has attracted a number of potential applications because of smaller per node cost, ease of deployment, scalability and low power stand alone solutions. WVSNs consist of a number of wireless Vision Sensor Nodes (VSNs). READ MORE