Title :
Wireless transmission of MPEG-4 video: performance evaluation of unequal error protection over a block fading channel
Author :
Martini, M.G. ; Chiani, M.
Author_Institution :
Dipt. di Elettronica, Inf. e Sistemistica, Bologna Univ., Italy
Abstract :
Video transmission over a wireless channel is extremely critical. In order to increase the robustness of the MPEG-4 video bitstream to channel errors, an unequal error protection (UEP) scheme is considered, exploiting the "data partitioning" tool provided by the MPEG-4 standard: each partition is protected according to its sensitivity to channel errors. Performances of such scheme are evaluated in a block fading channel, a model that is well suited to describe, for example, slow frequency hopping (SFH)/TDMA mobile radio systems. Performances are evaluated in terms of PSNR and compared to the case of equal error protection, with a code rate equal to the average rate of the considered UEP scheme. Results obtained with different block lengths are compared; different levels of channel state information availability at the receiver are also considered
Keywords :
cellular radio; code standards; error correction; fading channels; frequency hop communication; telecommunication standards; time division multiple access; video coding; visual communication; CSI availability; MPEG-4 standard; MPEG-4 video; SFH/TDMA mobile radio systems; UEP scheme; block fading channel; block lengths; channel errors; channel state information; code rate; data partitioning tool; performance evaluation; slow frequency hopping TDMA mobile radio systems; unequal error protection; video transmission; wireless channel; wireless transmission; Error correction codes; Fading; Frequency; Land mobile radio; MPEG 4 Standard; PSNR; Performance evaluation; Robustness; Time division multiple access; Wireless sensor networks;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.945058
