Search for dissertations about: "source-coding"

Showing result 1 - 5 of 23 swedish dissertations containing the word source-coding.

2. 1. A Universal Source Coding Perspective on PPM

   Author : Jan Åberg; Institutionen för elektro- och informationsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; coding with side information; multinomial estimation; maximum probability codes; MDL estimation; PPM; hierarchical source coding; universal source coding; text compression; lossless data compression; Automation; robotics; control engineering; Automatiska system; robotteknik; reglerteknik;

   Abstract : The PPM (Prediction by Partial Matching) family of text compression algorithms has several members that have shown to be very efficient in practice. This thesis treats PPM algorithms from an information-theoretical point of view, based on results and methods from universal source coding theory. READ MORE

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

   Author : Tomas Andersson; Mikael Skoglund; Astrid Lundmark; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; source coding; channel coding; joint source-channel coding; multiple description coding; image coding; vector quantization; channel optimized vector quantization; Telecommunication; 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

5. 3. On Secure and Sequential Source Coding

   Author : Hamid Ghourchian; Mikael Skoglund; Tobias J. Oechtering; Michèle Wigger; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

   Abstract : Secure source coding is an important research area in recent years as it deals with the problem of transmitting sensitive information over insecure channels while protecting it from unauthorized access. This is particularly relevant in the context of modern communication systems where the data transmitted is often sensitive in nature and the threat of eavesdropping or data breaches is high. READ MORE

6. 4. Source-Channel Coding in Networks

   Author : Niklas Wernersson; Mikael Skoglund; Geoffrey Chan; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; source coding; channel coding; joint source-channel coding; bandwidth expansion; distributed source coding; multiple description coding; soft decoding; Telecommunication; 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

7. 5. Communication With Reconstruction and Privacy Constraints

   Author : Kittipong Kittichokechai; Mikael Skoglund; Tobias J. Oechtering; Sennur Ulukus; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; source coding; channel coding; information privacy; physical layer security; action; side information; Electrical Engineering; Elektro- och systemteknik;

   Abstract : Communication networks are an integral part of the Internet of Things (IoT) era. They enable endless opportunities for connectivity in a wide range of applications, leading to advances in efficiency of day-to-day life. While creating opportunities, they also incur several new challenges. READ MORE