A MODIFIED ADAPTIVE DELTA MODULATOR FOR VIDEO DATA COMPRESSION.
Item
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Title
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A MODIFIED ADAPTIVE DELTA MODULATOR FOR VIDEO DATA COMPRESSION.
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Identifier
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AAI8203266
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identifier
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8203266
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Creator
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BARBA, JOSEPH.
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Contributor
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Prof. Donald L. Schilling
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Date
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1981
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Electronics and Electrical
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Abstract
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This paper presents the results of a study in data compression of adaptive delta modulated video signals. The Song mode ADM is first investigated and shown not to produce enough redundancy to warrant entropy encoding. We then present a modified adaptive delta modulator algorithm that produces sufficient redundancy to yield a 40-50% data compression by using a simple 4-bit block code. Other techniques such as field interpolation and direct substitution are shown to further increase the possible data compression without noticeable degradation in the two input images used in this investigation. A Frame Freeze unit is presented in appendix A that can be used in conjunction with the MADM to capture a frame a video for transmission over a computer network.;The effects of channel error in the transmission of packet video over a computer network are considered in the last chapter. A leaky integrator is used to reduce the effects of channel errors in the data bits. We show that the effects of channel errors on the block code header bits can be reduced by field interpolating those packet that can be determined to contain error on header bits.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Engineering
