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H.264 hierarchical P coding in the context of ultra-low delay, low complexity applications

H.264 hierarchical P coding in the context of ultra-low delay, low complexity applications,10.1109/PCS.2010.5702445,Danny Hong,Michael Horowitz,Alexan

H.264 hierarchical P coding in the context of ultra-low delay, low complexity applications   (Citations: 1)
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Despite the attention that hierarchical B picture coding has received, little attention has been given to a related technique called hierarchical P picture coding. P picture only coding without reverse prediction is necessary in constrained bit rate applications that require ultra-low delay and/or low complexity, such as videoconferencing. Such systems, however, have been using the traditional IPPP picture coding structure almost exclusively. In this paper, we investigate the use of hierarchical P coding vs. traditional IPPP coding and demonstrate that it has significant advantages which have not yet been well documented or understood. From a pure coding efficiency point of view, we show that for encoders configured to use ultra-low delay and low complexity coding tools, hierarchical P coding achieves an average advantage of 7.86% BD-rate and 0.34 dB BD-SNR.
Conference: Picture Coding Symposium - PCS , 2010
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