Survey of Dirac: A Wavelet Based Video Codec for Multiparty Video Conferencing and Broadcasting - Intelligent Video Event Analysis and Understanding - page 246

we modified the Openphone architecture to transmit the whole bitstream of one
frame before grabbing the next frame. After encoding, the transmission module is
called and the bitstreams packets are sent until the whole bitstream for one
encoded frame is transmitted. The new modified set of operations is presented in
Figure 37.
Fig. 37 Architectural modifications in Openphone [7]
By implementing these modifications we came up with a real time test bed in
the form of Openphone. To check any video codec in real time video conferencing
system, we can embed it Openphone and can calculate its bitrate, frame rate and
other real time options [6].
References
[1] Onthriar, K., Loo, K.K., Xue, Z.: Performance Comparison of Emerging Dirac Video
Codec with H.264/AVC. In: ICDT 2006 (September 2006)
[2] Ghanbari, M., Crawford, D., Fleury, M., Khan, E., Woods, J., Lu, H., Razavi, R.:
Future Performance of Video Codecs. Video Networking Laboratory (November
2006)
[3] Tun, M., Loo, K.K., Cosmas, J.: Semi-Hierarchical Based Motion Estimation
Algorithm for the Dirac Video Encoder. WSEAS Transactions on Signal
Processing 4(5), 261-270 (2008)
[4] Ali, A., Ali, S.F., Khan, N.A., Masud, S.: Performance improvement in motion
estimation of Dirac wavelet based video codec. In: Proc. ISCIT, Icheon, South Korea,
pp. 764-769 (2009)
[5] Bradley, A.P., Stentiford, F.W.M.: JPEG 2000 and Region of Interest Coding. In:
DICTA 2002: Digital Image Computing Techniques and Applications, Melbourne,
Australia, January 21-22 (2002)
[6] Ravi, A.: Performance Analysis and Comparison of Dirac Video Codec With H.264 /
Mpeg-4 Part 10 Avc
[7] Ahmad, A., Hussnain, M., Nazir, A., Khan, N., Masud, S.: Open Source Wavelet
Based Video Conferencing System using SIP. In: Proceedings of International
Conference on Information Society (I-Society 2010), London, UK, June 28-30 (2010)
[8] Dirac developer support,
http://dirac.sourceforge.net/documentation/algorithm/
algorithm/intro.htm
[9] Malvar, H.S., Hallapuro, A., Karczewicz, M., Korofsky, L.: Low-Complexity
Transform and Quantization in H.264/AVC. IEEE Trans. on Circuits and Systems for
Video Technology 13(7), 598-603 (2003)