Wise, Timothy Glen (2009) Error resilient H.264 coded video transmission over wireless channels. [USQ Project]
The H.264/AVC recommendation was first published in 2003 and builds on the concepts of earlier standards such as MPEG-2 and MPEG-4. The H.264 recommendation represents an evolution of the existing video coding standards and
was developed in response to the growing need for higher compression. Even though H.264 provides for greater compression, H.264 compressed video streams are very
prone to channel errors in mobile wireless fading channels such as 3G due to high error rates experienced.
Common video compression techniques include motion compensation, prediction methods, transformation, quantization and entropy coding, which are the common
elements of a hybrid video codecs. The ITU-T recommendation H.264 introduces several new error resilience tools, as well as several new features such as Intra Prediction and Deblocking Filter.
The channel model used for the testing was the Rayleigh Fading channel with the noise component simulated as Additive White Gaussian Noise (AWGN) using QPSK as the modulation technique. The channel was used over several Eb/N0 values to provide similar bit error rates as those found in the literature.
Though further research needs to be conducted, results have shown that when using the H.264 error resilience tools in protecting encoded bitstreams to minor channel errors improvement in the decoded video quality can be observed. The tools did not perform as well with mild and severe channel errors significant as the resultant bitstream was too corrupted. From this, further research in channel coding techniques is needed to determine if the bitstream can be protected from these sorts of error rates
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|Item Type:||USQ Project|
|Item Status:||Live Archive|
|Faculty / Department / School:||Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering|
|Date Deposited:||27 Jul 2010 05:30|
|Last Modified:||16 Nov 2011 05:23|
|Uncontrolled Keywords:||H.264/AVC; error resilience ; encoded bitstreams|
|Fields of Research :||10 Technology > 1005 Communications Technologies > 100509 Video Communications
08 Information and Computing Sciences > 0803 Computer Software > 080309 Software Engineering
10 Technology > 1005 Communications Technologies > 100510 Wireless Communications
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