A Study on Transmission of Scalable Video Coding Signals using Hybrid-Multiplexing Scheme based on OVSF Codes in VLC (VLC시스템에서 OVSF 코드 기반의 Hybrid 다중화 방식을 이용한 SVC 신호 전송에 관한 연구)

김균탁; Lee Kyu Jin (이규진)

A Study on Transmission of Scalable Video Coding Signals using Hybrid-Multiplexing Scheme based on OVSF Codes in VLC

Journal of Knowledge Information Technology and Systems
Abbr : JKITS
2016, 11(5), pp.549-558
Publisher : Korea Knowledge Information Technology Society
Research Area : Interdisciplinary Studies > Interdisciplinary Research
Published : October 31, 2016

김균탁 ¹, Lee Kyu Jin ²

¹경희대학교
²세명대학교

Accredited

ABSTRACT

In this paper, we propose a hybrid-multiplexing scheme in order to effectively transmit scalable video coding (SVC) signals in the visible light communication systems. SVC signals are composed of one base layer (level 0) and several enhance layers (level 1~L). In the transmission systems of SVC signals, base layer’s signals must achieve the best bit error rate (BER) performance. Also, in enhance layers, the improved BER performance is required, when the level of those is reduced. Hence, those SVC layers have different weights in accordance with each layer’s level. Based on those characteristics, SVC signals can be multiplexed by allocating the orthogonal spreading codes with different lengths, and those orthogonal codes are called as orthogonal variable spreading factor (OVSF) codes. However, in the conventional code division multiplexing (CDM) systems, inter-code interference (ICI) is increased, when the number of multiplexing blocks is increased. So, the BER performance of SVC transmission systems is degraded. To overcome those problems, our proposed system combines CDM with time division multiplexing (TDM) based on OVSF codes. When the proposed multiplexing scheme was adopt to the SVC transmission system, the number of multiplexing blocks can be decreased and the BER performance can be improved by reducing the ICI effects. Through the simulation results, we demonstrate the effectiveness of our proposed system.

KEYWORDS

Visible light communication, Scalable video coding, orthogonal variable spreading factor codes, code division multiplexing, time division multiplexing

Citation status

* References for papers published after 2023 are currently being built.

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