Zusammenfassung
This thesis provides an analysis of the entire video communication system assuming a wireless, frequency- and time-selective channel under low-delay constraints. The whole system consists of a standard-compliant video codec (HEVC), a channel codec and a modem (OFDM). A design methodology in terms of the rate-distortion optimization and a suitable framework to asses the entire system is proposed. It has synchronization capabilities and a suitable metric that turns out to be a key component of the rate-distortion based optimization procedure.
The trade-offs and interrelations of the parameters that have the most significant impact in the total distortion and robustness of the video signal are investigated. By means of intensive and sufficient simulations of an entire video transmission chain, it has been shown that the multiple techniques introduced and described in this thesis are viable tools for the design and optimization of specific video communication systems and its components.
C O N T E N T S
1 introduction 1
1.1 Basics of Video Communication Systems . . . . . . . . . . 1
1.2 Challenges . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.1 Shannon’s Separati...
Schlagworte
Videocodierung Fehlerverschleierung Videokommunikationssysteme Orthogonal Frequency-Division Multiplexing (OFDM) Video coding error concealment video communication systems- 1–14 1 Introduction 1–14
- 120–124 5 Conclusions 120–124
- 125–138 Bibliography 125–138
7 Treffer gefunden
- „... introduced in detailin Chapter 4.2.4 basics of high efficiency video codingHigh Efficiency Video Coding (HEVC ...” „... basics of versatile video codingThe basic coding structure of VVC is the same as in HEVC: a ...” „... video coding, i.e., a higher codingefficiency means a better reduction of the redundancy from the ...”
- „... Team on Video CodingJSCC Joint Source-Channel CodingJVET Joint Video Exploration TeamLPF Low-Pass ...” „... Autocorrelation FunctionARQ Automatic Repeat RequestAVC Advanced Video CodingAWGN Additive White Gaussian ...” „... PicturesHD High-DefinitionHEVC High Efficiency Video CodingHM HEVC Test ModelHM Reference Software of HEVCICI ...”
- „... Efficiency Video Coding(HEVC) and a channel coding with variable coding rate, demon-strate the procedure to ...” „... of identifying and reducing the redundancy of the video signal si.We assume a lossy source coding ...” „... quality of the video must be maximized. Forthe video encoding block, the High Efficiency Video Coding ...”
- „... was selected to controlthe video coding efficiency are: {QP, GOP, Slices}. We observed thatQP has the ...” „... conclusionscontrolled by the code rate rc of the channel coding. Moreover, thedesigned video communication system was ...” „... conclusions regarding a video coding system with the introduced ECfor HEVC in this thesis can also be applied ...”
- „... Liu, and YK Wang. “Versatile Video Coding(Draft 10).” In: ITU-T and ISO/IEC JVET-S2001 (2020).[11 ...” „... Ostermann. “Parameter Selection fora Video Communication System based on HEVC and ChannelCoding.” In: IEEE ...” „... .” In: (2008).[27] Mathias Wien. “High efficiency video coding.” In: Coding Toolsand specification 24 ...”
- „... bit-budget is spent for the channel coding,then less bits are available for the video coding. Therefore ...” „... communication systemover an error prone channel is investigated. The video coding system ofChapter 2 and the ...” „... systems for video and channel coding. No modificationare intended in any system. One of the problems when ...”
- „... , channel coding and modulation. These blocks are speciallydesigned to achieve video information ...” „... coding block is introduced, which is responsible for compressingthe video signal to a rate lower than the ...” „... analogous to IDR framesin video coding, the insertion of preambles helps to resynchronize but ifthere is no ...”