Fast and bit-saving video bit-rate switching is an important issue in video streaming systems on a time varying channel as the one offered by a wireless mesh network, or the one sensed during a vertical handover. The recent H.264 video coding standard supports the seamless switching among bitstreams coded at different bit-rates by means of suitably coded frames, named Switching Pictures. This work addresses the modelling of the traffic generated by a H.264 source performing bit-rate switching using SP frames. The H.264 source is modelled by a Markov chain where each state models the generation of an entire Group Of Pictures (GOP), and is characterized by the kind of SP frame encoded in the GOP. Interframe correlation, typical of video sources, is suitably taken into account by the interstate dependence. The accuracy of the model is assessed by comparison of the cell loss rate of a fixed size buffer filled with a synthetic source according to the model herein proposed, with a state of the art AR model and with a real H.264 video codec. © 2008 IEEE.

MARKOV MODEL OF H.264 VIDEO SOURCES PERFORMING BIT-RATE SWITCHING / Colonnese, Stefania; Gianpiero, Panci; Rinauro, Stefano; Scarano, Gaetano. - (2008), pp. 2556-2559. (Intervento presentato al convegno 15th IEEE International Conference on Image Processing (ICIP 2008) tenutosi a San Diego; United States nel OCT 12-15, 2008) [10.1109/icip.2008.4712315].

MARKOV MODEL OF H.264 VIDEO SOURCES PERFORMING BIT-RATE SWITCHING

Stefania Colonnese;RINAURO, STEFANO;SCARANO, Gaetano
2008

Abstract

Fast and bit-saving video bit-rate switching is an important issue in video streaming systems on a time varying channel as the one offered by a wireless mesh network, or the one sensed during a vertical handover. The recent H.264 video coding standard supports the seamless switching among bitstreams coded at different bit-rates by means of suitably coded frames, named Switching Pictures. This work addresses the modelling of the traffic generated by a H.264 source performing bit-rate switching using SP frames. The H.264 source is modelled by a Markov chain where each state models the generation of an entire Group Of Pictures (GOP), and is characterized by the kind of SP frame encoded in the GOP. Interframe correlation, typical of video sources, is suitably taken into account by the interstate dependence. The accuracy of the model is assessed by comparison of the cell loss rate of a fixed size buffer filled with a synthetic source according to the model herein proposed, with a state of the art AR model and with a real H.264 video codec. © 2008 IEEE.
2008
15th IEEE International Conference on Image Processing (ICIP 2008)
bit-rate switching; h.264; source modelling
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
MARKOV MODEL OF H.264 VIDEO SOURCES PERFORMING BIT-RATE SWITCHING / Colonnese, Stefania; Gianpiero, Panci; Rinauro, Stefano; Scarano, Gaetano. - (2008), pp. 2556-2559. (Intervento presentato al convegno 15th IEEE International Conference on Image Processing (ICIP 2008) tenutosi a San Diego; United States nel OCT 12-15, 2008) [10.1109/icip.2008.4712315].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/326356
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