search for: piga

Shows that as the MCU increases, the OpenMP extra overhead is amortized and OpenMP becomes as fast as the pthreads implementation. The last chart http://lampiao.lsc.ic.unicamp.br/~piga/gsoc_2008/systime.png Shows that both pthreads and OpenMP overhead decreases as what seems to be a logarithmic function of the MCU size. This was a great experiment, and from what I can conclude, the OpenMP implementation can be as good as the pthread. Therefore maybe it is worth to work on a O...

...these functions: (c_dec_dc_unpredict_mcu_plane + oc_dec_frags_recon_mcu_plane) and (oc_state_loop_filter_frag_rows + oc_state_borders_fill_rows) as explained in my previous email. But the results were not good. They were equal the implementation without pipeline. http://lampiao.lsc.ic.unicamp.br/~piga/gsoc_2008/comparison.png http://lampiao.lsc.ic.unicamp.br/~piga/gsoc_2008/speedup.png http://lampiao.lsc.ic.unicamp.br/~piga/gsoc_2008/systime.png Next I tried to do some improvements, but without success. I think that the implementation as it is, could not be improved more with parallelism. Ano...

...d too many times. The time spent to create and synchronize threads is greater than the speed up gains. We need functions that are called a few times and spend many cpu time. Also data dependency should be the lowest as possible. According to the model that i did ( http://lampiao.lsc.ic.unicamp.br/~piga/gsoc_2008/implementation.pdf<http://lampiao.lsc.ic.unicamp.br/%7Epiga/gsoc_2008/implementation.pdf>) the decoding time should be reduced in 33%, but it was just 10% for pthread an 5% for openMP. I used a video with 1440x1080. The pthread implementation has 3 threads and the OpenMP was execut...

...roprietary processor. I will comment the code better and post in the SVN the quickest as possible. I will did a little movie with the video playing when I finish the integration with the VGA controller. I want thanks Felipe Portavales Goldstein to the support and help. -- Leonardo de Paula Rosa Piga Undergraduate Computer Engineering Student LSC - IC - UNICAMP http://www.students.ic.unicamp.br/~ra033956

I have tried to add a plunging to the "libtheora-1.0beta2" (network bandwidth measuring component was added) and Got it success for some far now the problem is when it is added the encoding process get extremely slow (around 20 seconds delay). I think that the problem is with my modified Makefile (some flag may have missed). the following is my modified Makefile.am which is in the

...At thi time a samba user different from the owner of a file can't set or unset the archive attribute from a Windows Client. Anyone know how to fix it? Please help me, It's a long time that the backup is unavailable and a hardware failure of the HD is coming....I'm sure... Bye, Carlo Piga

Hi, I did some improvements and some bug corrections in Theora FPGA code. I'd like to post this new version in the SVN. How can I do that? Thanks -- Leonardo de Paula Rosa Piga Undergraduate Computer Engineering Student LSC - IC - UNICAMP http://www.students.ic.unicamp.br/~ra033956

What is the PostProcessingLevel field of PB_INSTANCE? When is it used? It is used for all Theora's video or it is just for legacy support with VP3? Thanks -- Leonardo de Paula Rosa Piga Undergraduate Computer Engineering Student LSC - IC - UNICAMP http://www.students.ic.unicamp.br/~ra033956

...lution is 96x80, because we have some FPGA internal memory constraints. I will try to use external memory to make possible decode a video of at least 320x240. The result can be see here: http://www.youtube.com/watch?v=fPmMYG6_VgI More informations coming soon! Thanks -- Leonardo de Paula Rosa Piga Undergraduate Computer Engineering Student LSC - IC - UNICAMP http://www.students.ic.unicamp.br/~ra033956

Hi all, I have to compare the theora codec with MPEG and H264. I was googling and I found that the PSNR is a common used parameter. How can I do this with Theora? Thanks -- Leonardo de Paula Rosa Piga Undergraduate Computer Engineering Student LSC - IC - UNICAMP http://www.students.ic.unicamp.br/~ra033956

...at Theora Decoder is a good choice for me, because I had been working with it in a FPGA implementation and I have experience with the library. I'm thinking in working with LoopFilter at first. Do you think I could start with it or there is a better choice? Thanks -- Leonardo de Paula Rosa Piga Undergraduate Computer Engineering Student LSC - IC - UNICAMP http://www.students.ic.unicamp.br/~ra033956

I have tried to add a plunging to the "libtheora-1.0beta2" (network bandwidth measuring component was added) and Got it success for some far now the problem is when it is added the encoding process get extremely slow (around 20 seconds delay). I think that the problem is with my modified Makefile (some flag may have missed). the following is my modified Makefile.am which is in the

Are there any academic papers that promote theora? I know of one, are there more? Universal Multimedia Access and Open Standards <http://www.t4p.no/t4p.no/conference/media/Vaaler.pdf> tom_a_sparks Please avoid sending me Word or PowerPoint attachments. but instead use OpenDocument File Formats or use OpenOffice http://en.wikipedia.org/wiki/OpenDocument

...9;s LoopFilter function in a FPGA. I need to know what is the maximum memory allocation size which display_fragment and recon_pixel_index_table points. These are fields of PB_INSTANCE structure that is declared in the codec_internal.h Thank you =========================== Leonardo de Paula Rosa Piga Computer Engineering Student Universidade Estadual de Campinas =========================== -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/theora-dev/attachments/20060606/7cad2174/attachment.htm

...ation of Theora, I saw the "VP3 Compatibility", but this shows the differences between original VP3 and the Theora Specification. What are differences between new and old VP3 codebase that timothy said to me? is there any document that shows the differences? Felipe Portavales and Leonardo Piga used the libtheora-1.0alpha6 in the reference model of Hardware Theora. is libtheora-1.0alpha6 using the new or old codebase? So, I thinks the most important task is the SDRAM controller, but the Integration with a processor and video controller are also important. What do you think that would be...