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dc.contributor.advisorLiu, Ming-Kangen_US
dc.contributor.authorChowdhury, Sharmeen, 1966-
dc.creatorChowdhury, Sharmeen, 1966-en_US
dc.date.accessioned2013-05-16T09:52:18Z
dc.date.available2013-05-16T09:52:18Z
dc.date.issued1992en_US
dc.identifier.urihttp://hdl.handle.net/10150/292041
dc.description.abstractVideo communication has advanced significantly over the last decade. Low bit rate video coding and low cost packet switching network access have made video communication practical and cost-effective. CCITT has recommended a compression standard (H.261) with a rate of px 64 Kb/s for p=1 to 30. The key elements of H.261 are: (1) interframe compensation, (2) motion compensation, (3) discrete cosine transform (DCT), (4) quantization, and (5) coding. For interframe compensation, only the difference of two consecutive frames is transmitted. In motion compensation, a spatial displacement vector is derived. DCT is used to convert spatial data into spatial frequency coefficients. All transformed coefficients are quantized with uniform quantizer for which step size is adjusted according to the buffer occupancy. Quantized coefficients are encoded using both fixed and variable length coding. At the decoder, the inverse operation of compression is performed. In this thesis, a detailed description of H.261 and its implementation in software are provided.
dc.language.isoen_USen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.subjectEngineering, Electronics and Electrical.en_US
dc.titleCCITT recommendation H.261 video codec implementationen_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.identifier.proquest1350936en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
thesis.degree.nameM.S.en_US
dc.identifier.bibrecord.b26422712en_US
refterms.dateFOA2018-08-30T04:04:35Z
html.description.abstractVideo communication has advanced significantly over the last decade. Low bit rate video coding and low cost packet switching network access have made video communication practical and cost-effective. CCITT has recommended a compression standard (H.261) with a rate of px 64 Kb/s for p=1 to 30. The key elements of H.261 are: (1) interframe compensation, (2) motion compensation, (3) discrete cosine transform (DCT), (4) quantization, and (5) coding. For interframe compensation, only the difference of two consecutive frames is transmitted. In motion compensation, a spatial displacement vector is derived. DCT is used to convert spatial data into spatial frequency coefficients. All transformed coefficients are quantized with uniform quantizer for which step size is adjusted according to the buffer occupancy. Quantized coefficients are encoded using both fixed and variable length coding. At the decoder, the inverse operation of compression is performed. In this thesis, a detailed description of H.261 and its implementation in software are provided.


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