Vasileios Theodorakopoulos

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This paper presents a dual priority transmission system for mobile channels suitable for mobile video applications. A dual priority 16-QAM is selected to transport the compressed video bitstream which is partitioned to mach the bit-error sensitivity of the transmitted symbol in terms of mapping in the constellation diagram and picture quality. The partition(More)
This paper presents a dual priority transmission system for mobile channels suitable for mobile video applications. The transmission system is comprised of a 16 quadrature amplitude modulation (QAM) technique and channel-coding scheme. The twin class 16-QAM system is used to transport a compressed video bitstream, which is partitioned to mach the bit-error(More)
This paper presents a robust transmission of H264/AVC coded video using hierarchical quadrature amplitude modulation (HQAM), which takes into consideration the non-uniformly distributed importance of frames in a group of pictures (GOP) intracoded (I-frames) and predictive coded frames (P-frames) as well as the sensitivity of the coded bitsream against(More)
This paper presents a unique set of techniques to support reliable and efficient video transmission over mobile channels. The transmission system is comprised of an M level Quadrature Amplitude Modulation (QAM) technique. A twin class uniform and non-uniform partitioned M-QAM system is used to transport a compressed video bitstream which is partitioned to(More)
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