3D Wavelet-Based Video Codec with Human Perceptual Model

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dc.contributor.advisorBaras, John S.en_US
dc.contributor.authorGu, Junfengen_US
dc.contributor.departmentISRen_US
dc.contributor.departmentCSHCNen_US
dc.date.accessioned2007-05-23T10:08:45Z
dc.date.available2007-05-23T10:08:45Z
dc.date.issued1999en_US
dc.description.abstractThis thesis explores the use of a human perceptual model in video compression, channel coding, error concealment and subjective image quality measurement. <p>The perceptual distortion model just-noticeable-distortion (JND) is investigated. A video encoding/decoding scheme based on 3D wavelet decomposition and the human perceptual model is implemented. It provides a prior compression quality control which is distinct from the conventional video coding system. JND is applied in quantizer design to improve the subjective quality ofcompressed video. <p>The 3D wavelet decomposition helps to remove spatial and temporal redundancy and provides scalability of video quality. In order to conceal the errors that may occur under bad wireless channel conditions, a slicing method and a joint source channel coding scenario that combines RCPC with CRC and uses the distortion information toallocate convolutional coding rates are proposed. A new subjective quality index based on JND is proposed and used to evaluate the overall performance at different signal to noise ratios (SNR) and at different compression ratios.<P><P>Due to the wide use of arithmetic coding (AC) in data compression, we consider it as a readily available unit in the video codec system for broadcasting. A new scheme for conditional access (CA) sub-system is designed based on the cryptographic property of arithmetic coding. Itsperformance is analyzed along with its application in a multi-resolution video compression system. This scheme simplifies the conditional access sub-system and provides satisfactory system reliability.en_US
dc.format.extent1126672 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/6103
dc.language.isoen_USen_US
dc.relation.ispartofseriesISR; MS 1999-3en_US
dc.relation.ispartofseriesCSHCN; MS 1999-3en_US
dc.subjectVideo Compressionen_US
dc.subjectHuman Perceptual Modelen_US
dc.subjectData Compressionen_US
dc.subjectIntelligent Signal Processing and Communications Systemsen_US
dc.title3D Wavelet-Based Video Codec with Human Perceptual Modelen_US
dc.typeThesisen_US

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