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dc.date.accessioned2013-03-12T07:57:52Z
dc.date.available2013-03-12T07:57:52Z
dc.date.issued2011en_US
dc.date.submitted2011-09-08en_US
dc.identifier.citationFinstad, Dag Haavi. Multi-Rate VP8 Video Encoding. Masteroppgave, University of Oslo, 2011en_US
dc.identifier.urihttp://hdl.handle.net/10852/8984
dc.description.abstractAdaptive HTTP streaming is frequently used for both live and on demand video delivery over the Internet. Adaptiveness is often achieved by encoding the video stream in multiple qualities (and thus bitrates), and then transparently switching between the qualities according to the bandwidth fluctuations and the amount of resources available for decoding the video content on the end device. For this kind of video delivery over the Internet, H.264 is currently the most used codec, but VP8 is an emerging open source codec expected to compete with H.264 in the streaming scenario. The challenge is that, when encoding video for adaptive video streaming, both VP8 and H.264 run once for each quality layer, i.e., consuming both time and resources, especially important in a live video delivery scenario. In this thesis, we address the resource consumption issues by proposing a method for reusing redundant steps in a video encoder, emitting multiple outputs with varying bitrates and qualities. It shares and reuses the computational heavy analysis step, notably macro-block mode decision, intra prediction and inter prediction between the instances, and outputs video in several rates. The method has been implemented in the VP8 reference encoder, and experimental results show that we can encode the different quality layers at the same rates and qualities compared to the VP8 reference encoder, while reducing the encoding time significantly.eng
dc.language.isoengen_US
dc.titleMulti-Rate VP8 Video Encodingen_US
dc.typeMaster thesisen_US
dc.date.updated2012-02-22en_US
dc.creator.authorFinstad, Dag Haavien_US
dc.subject.nsiVDP::420en_US
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Finstad, Dag Haavi&rft.title=Multi-Rate VP8 Video Encoding&rft.inst=University of Oslo&rft.date=2011&rft.degree=Masteroppgaveen_US
dc.identifier.urnURN:NBN:no-29844en_US
dc.type.documentMasteroppgaveen_US
dc.identifier.duo135255en_US
dc.contributor.supervisorHåkon Kvale Stensland, Pål Halvorsenen_US
dc.identifier.bibsys120377225en_US
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/8984/1/Finstad.pdf


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