A 1-Bit/Pel Digital Encoder for Achromatic Pictures

Abstract

The paper describes a scheme for producing and digitizing a low-resolution (256 × 256 pels) achromatic picture signals. Using the technique of time expansion at the transmitter, it is possible to send a higher quality picture at a lower bit rate. A DM-encoded picture at 8 MHz is transmitted at 4 Mb/s in the channel achieving a band compression by four. Suitable interpolation at the receiver improves the quality of the picture.

Indexing Terms:

• Digital Encoder
• Band Compression
• Interpolation