Fig 5 - uploaded by Jia-Chyi Wu
Content may be subject to copyright.
Source publication
Under limited channel capacity condition, this study investigates a combined source and channel coding algorithm providing a uniform video transmission rate to achieve better system performance in wireless MIMO systems. In the proposed algorithm, we applied MPEG2 video source coding scheme with convolutional channel coding as well as space-time blo...
Context in source publication
Context 1
... order to reduce the channel error effect and to improve the system performance while transmitting video signals over wireless channel, we have employed the convolutional encoder and maximum-likelihood Viterbi hard decision decoder for channel error correction. Figure 5 shows a typical 1/2 recursive systematic convolutional (RSC) code scheme with generator function Proakis, 2001). After the convolutional encoding, the processed data is fed into a random interleaver to reduce burst error effect in wireless channel. ...
Similar publications
Applications of wireless multimedia sensor networks (WMSNs) require high data rates to enable delivery of quality video at any channel conditions. In order to improve the performance of video transmission over ultra-wideband (UWB) WMSNs, we first propose an optimum group-of picture bit-stream partitioning algorithm for unequal error protection (UEP...
This paper deals with performance investigation of
H.264/MPEG-4 video transmission using unequal error protec-tion (UEP) and turbo product coding (TPC) in wireless prone
channels. Unequal amounts of protection are allocated to the
different frames (I, P and B frames) of a group-of-pictures
(GOP) according to different contribution of such frames on...
Multicarrier systems are adopted in several standards for their ability to achieve optimal performance in highly dis- persive channels. In particular, Orthogonal Frequency Division Multiplexing (OFDM) and Filtered Multitone (FMT) systems are two special cases of multicarrier sys- tems which differs in terms of spectral partitioning. FMT does not re...
Citations
... Many different approaches have been proposed in order to improve video transmission over the wireless communication system. In [6] , a simple scheme is introduced to investigate the system performance of MPEG-2-coding scheme with a joint of convolution channel coding and MIMO based on space-time block code (STBC) techniques over Rayleigh fading noises. In addition, in [7], a MIMO system based on full multiplexing structure is proposed. ...
The multiple input multiple output (MIMO), cooperative communication and three dimensional (3-D) video coding are three state-of-the-art techniques. The combination be-tween the cooperative system with MIMO is useful to pro-vide a high data rate with a high quality of 3-D video services. By taking the advantages of these techniques, this paper presents 3-D video transmission over cooperative MIMO system. The proposed system based on a partitioning scheme, which uses adaptive allocation of Variable Length Codes (VLCs) with Unequal Error Protection (UEP) scheme for left and right views. In this scheme, video data is par-titioned according to its importance into high priority (HP) and low priority (LP) coefficients. Because the video signal is usually sensitive to bit error, two methods are proposed. The first proposed technique is to interleave the Resynchro-nization pattern between VLCs to isolate the propagation of errors over the video stream. The second method is to im-prove the performance of the video decoder decision at lower values of Signal to Noise Ratio (SNR). Simulation results demonstrate the effectiveness of the proposed schemes.
Currently, there has been intensive research to drive three-dimensional (3-D) video technology over mobile devices. Most recently, multi-input multi-output (MIMO) with orthogonal frequency division multiplexing (OFDM) and cooperative diversity have been major candidates for the fourth-generation mobile TV systems. This article presents a novel unequal error protection (UEP) scheme for 3-D video transmission over cooperative MIMO-OFDM systems. Several 3-D video coding techniques are investigated to find the best method for 3-D video transmission over the error-prone wireless channels. View plus depth (VpD) has been found the best technique over other techniques such as simulcast coding (SC) and mixed-resolution stereo coding (MRSC) in terms of the performance. Various UEP schemes are proposed to protect the VpD signals with different importance levels. Seven video transmission schemes for VpD are proposed depending on partitioning the video packets or sending them directly with different levels of protection. An adaptive technique based on a classified group of pictures (GoP) packets according to their protection priority is adopted in the proposed UEP schemes. The adaptive method depends on dividing GoP to many packet groups (PG’s). Each PG is classified to high-priority (HP) and low-priority (LP) packets. This classification depends on the current signal-to-noise ratio (SNR) in the wireless channels. A concatenating form of the rate-variable low-density parity-check (LDPC) codes and the MIMO system based on diversity of space-time block codes (STBC) is employed for protecting the prioritized video packets unequally with different channel code rates. For channel adaptation, the switching operations between the proposed schemes are employed to achieve a tradeoff between complexity and performance of the proposed system. Finally, three protocols for 3-D video transmission are proposed to achieve high video quality at different SNRs with the lowest possible bandwidth.
The Dynamic Traffic Information publish platform is a core component of the ITS information service system, which focuses on the function of retrieving ITS data from background servers and delivering them to the registered client terminators. The Intelligent Transportation System data format is characterized by its diversity and the complexity, and the traditional data representation cannot fulfill the performance goal of ITS data publish. For this reason, a new publish platform of Dynamic Traffic Information was discussed in this paper. Basing on the latest DATEX II data exchange standard, the platform’s scalability and functionality were greatly enhanced.
