Transmission of video telephony images over wireless channels

Rate-distortion based real-time wireless video streaming

“…Therefore, the order of complexity of this algorithm is given by the number of packets as OðLÞ. This order of complexity (14), (15) 3. Label the packets that are not transmitted before, or transmitted at least a round-trip time ago 4.…”

“…The rate function given in (15) is also reduced to R f ;k ðtÞ ¼ B f ;k , since we do not incorporate the FEC rate selection in the packet scheduling. Furthermore, we also ignore the minimization of the rate function, since the video packet sizes are the same on the average.…”

“…In general, FEC techniques use layer information of data as in [15,2]. The other approaches for error correction are to select FEC rates in a R-D optimized manner as in [5,29].…”

“…The first group of FEC/ARQ techniques; [23,14,21] determine FEC rates by taking into account the properties of different video layers, and employs hybrid-I or hybrid-II ARQ schemes as proposed in [16,15].…”

A Jointly Optimized VariableM-QAM and Power Allocation Scheme for Image Transmission

“…In UEP, the coded image information is usually divided into two or more partitions. For instance, the first partition typically contains the DC components and protected with a low code rate followed by one or more partitions containing the AC components that are coded at higher code rates [4][5][6][7]. A variation of the channel coding approach is joint source/channel coding (JSCC) 2 Journal of Computer Networks and Communications [8][9][10][11][12][13] to achieve significant performance improvement, in contrast to Shannon's information separation theorem [14].…”