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.
|Number of pages||26|
|Journal||COMSAT Technical Review|
|State||Published - 1 Jan 1975|