STUDY AND SIMULATION OF A VARIABLE LENGTH CODE DPCM FOR THE LUMINANCE SIGNAL IN DITEC.

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Abstract

Some quantizing and coding algorithms for differential pulse code modulation (DPCM) are analyzed and evaluated in terms of data statistics generated on the digital television communication system (DITEC) developed at COMSAT Laboratories. A DPCM encoder for monochrome television signals using entropy coding and selective prediction is proposed. Simulations of this encoder show that, at a transmission rate of 4. 5 bits/picture element (pel), there is no perceptible degradation between the original and the reconstructed pictures. A transmission buffer of 4,000 bits has been found adequate to accommodate the digitized signal.

Original languageEnglish
Pages (from-to)275-300
Number of pages26
JournalCOMSAT Technical Review
Volume5
Issue number2
StatePublished - 1 Jan 1975

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