Channel aware unequal error protection for image transmission over broadband wireless LAN
نویسندگان
چکیده
. . oimullimedia data, Ihr proposed scheme can improve the Peak-SignalIo-Noise-Ratio (PSNR) oireconstrurled imaxes by sip lo RIB. patterns nre introduced and the mean square channel estiination error (MSE) of diffcerent OFDM subchannels is derived. Furthermore, we propose the Priority Transmission (PT) scheme, which provides unequal emor protectioii for multimcdia transmission by matching the iniwrtance oi the data to the error variation iu OFDM suhchnI. 1NTKODUCTION
منابع مشابه
A New Unequal Error Protection Technique Based on the Mutual Information of the MPEG-4 Video Frames over Wireless Networks
The performance of video transmission over wireless channels is limited by the channel noise. Thus many error resilience tools have been incorporated into the MPEG-4 video compression method. In addition to these tools, the unequal error protection (UEP) technique has been proposed to protect the different parts in an MPEG-4 video packet with different channel coding rates based on the rate...
متن کاملLinear Unequal Error Protection for Region of Interest Coded Images over Wireless Channels
In this thesis, an unequal error protection scheme for transmitting JPEG2000 images over wireless channel is investigated. The rapid growth of wireless communication has resulted in a demand for robust transmission of compressed images over wireless networks. The challenge of robust transmission is to protect the compressed image data against the impairments of the radio channel, in such a way ...
متن کاملJPEG Image Transmission over Rayleigh Fading Channel with Unequal Error Protection
In this paper an image transmission system has been proposed where Joint Photographic Experts Group (JPEG) algorithm is used as an image coder and Rate Compatible Punctured Convolution (RCPC) channel coder is used for transmission of coded image over wireless channels (AWGN and Rayleigh fading). JPEG bit stream is partitioned into DC and AC bit streams. AC bit stream further classified using ed...
متن کاملWireless Image Transmission Using Multiple - Description
This work introduces a multiple-description product code which aims at optimally generating multiple, equally-important wavelet image descriptions. The codes used are a concatenated channel code including a row (outer) code based on RCPC codes with CRC error detection and a source-channel column (inner) code consisting of the scalable SPIHT image coder and an optimized array of unequal protecti...
متن کاملRobust adaptive transmission of images and video over multiple channels
Reliable transmission of images and video over wireless networks must address both potentially limited bandwidths and the possibilities of loss . When bandwidth sufficient to transmit the bit stream is unavailable on a single channel, the data can be partitioned over multiple channels with possibly unequal bandwidths and error characteristics at the expense of more complex channel coding (i.e.,...
متن کامل