A Macroblock Unequal Error Protection Scheme for Uncompressed Wireless Video Transmission Using Iterative 3D-MRF based Decoder
Date Issued
2015
Date
2015
Author(s)
Lee, Po-Hsi
Abstract
Due to the development of 57-66GHz millimeter-wave, which provides huge bandwidth and multi-Gbps transmission data rate, uncompressed high-definition video transmission is becoming an interesting application over wireless personal area networks (WPANs). However, mmWaves signals have more attenuation than conventional low frequency signals. Hence, wireless transmission under this low SNR condition become an issue. In this thesis, we proposed a unequal error protection (UEP) scheme which determines the power distributing policy according to the redundancy of a macroblock for iterative 3D-MRF based decoder. The 3D-MRF based source decoder utilizes the spatial and temporal redundancy for each macroblock split from a bit-plane. To allocate the transmission power accurately, the encoder estimates the decoded video quality using such MRF model to obtain spatial and temporal redundancy for all macroblocks before transmission. The optimal power allocation problem, which corresponds to maximizing video quality in term of peak-to-noise ratio (PSNR) is then solved by Lagrange multiplier. Simulation results show that the proposed macroblock UEP scheme enhances the decoded visual quality depending on the video properties and content. The bit-plane UEP scheme is also combined with our proposed macroblock UEP scheme. We observe that the proposed macroblock UEP performs better than bit-plane UEP when the transmission video is rich in temporal redundancy.
Subjects
macroblock
unequal error protection
wireless communication
iterative joint source-channel decoding
Markov random fields
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R02942041-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):3e74e56df477d941639b0797609e015f