Spring 2011 (RA)

Courses:
- CMPT 771: Internet Architectures and Protocols
- CMPT 885 : Special Topics, Computer Architecture

Read a paper about various types of coding used in 3D technologies. Surprisingly, H.264/MVC does not seem to add that much of compression when considering the significant increase of processing power required for decoding. On the other hand, Video plus depth requires a fraction of bitrate of its coloured counterpart (in the range of 10-20%) in order to achieve high quality. Multiview video plus depth coding can be useful in order to estimate views instead of sending them. Such process can again, be computionally expensive, and estimation algorithms are still not perfect. However, such method has an interesting aspect to it: one could use multiview video plus depth in order to have a proxy storing the video, and estimates the specific number of views required for the device that needs to display the video. The beauty of this is the flexibility when it comes to support a broad array of mobile devices.

In my readings, I have found that MPEG-3 Part C can be used for Video Plus Depth, something that should be looked a bit more into. It gives some flexibility when it comes to how to encode the colour video, and the depth map independently. H.264 Auxiliary Picture Syntax, on the other hand, does not offer such flexiblity

Had a busy weekend with my birthday ;-) But, also worked on the presentation I gave about 3D videos during our weekly team meeting. During the same week, I got familiar with the concept of remote rendering. I have read about some previous experiments where it was used in a virtual reality environment, and how the concept was used to improve the current viewpoint selection process on mobile devices. The papers helped me understand the concept, and the various way a proxy server could be used, even if it was used in a freeview point context rather than a stereo video one. For example, it can be used to partially render a video, or even completely. GPUs could also be used if needed. However, the problematic being solved being different than the one I am focusing on, the aspect of computing the reference frames needed when a user change the viewpoint was of little interest.

Fall 2010 (TA)

Worked on Litterature Survey of 3D technologies, and understanding the current research areas with a focus on those that are related to the field of 3DTV on Mobile Devices. Also, I got familiar with a power measurement tool for Android, and understand how to apply it in the context of academic research.