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Transporting hybrid coded video over wireless channel is very challenging. Efficient coding and compression techniques are required to meet the QoS (Quality of Service) requirements of such services. H.264, the latest coding and compression standard from ITU-T, is currently dominating the field by offering a flexible architecture and compression gain of up to 50%. In H.264, intra frame prediction...
In this paper, a joint source-channel coding (JSCC) scheme for unequal error protection (UEP) based H.264 over wireless channels is proposed. H.264 coded information is divided into different parts according to their different importance, each part is transmitted differentially based on MIMO-OFDM system by applying unequal number of information bits in channel error- correction code to achieve unequal...
We propose a low-delay low-complexity end-to-end video transmission system that integrates the latest scalable H.264 codec and the full-rate full-diversity quasi-orthogonal space-time block codes. At the encoder of the scalable H.264 codec, we have developed a low-delay low-complexity method for the estimation of the video distortion at the receiver for given channel conditions. The distortion estimation...
Unreliable and error-prone nature of wireless channel is a great challenge for wireless video communications. According to high frequency of error occurrence in wireless channel, limited resources bandwidth and transmission power in mobile terminal, this paper represents a content-based adaptive intra block update method. It takes different intra block update rate on different image features. The...
Rapid development in the area of broadband wireless communications demands wireless video services. The maximal challenges of transmitting video over wireless channels are non-line-of-sight (NLOS) fading deteriorate and higher data rates requirement. Fortunately, the 802.16a standard supports licensed and license-exempt spectra between 2 and 11 GHz, which is especially useful for NLOS cases. On the...
In this paper we consider the problem of faded wireless image and video transmission schemes over multi-input multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) channels that are energy and the bandwidth constrained. A computationally inexpensive analytic mean square error (MSE) distortion rate (D-R) estimator for progressive wavelet coders which generates an exact D-R (distortion...
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