COMMUNICATION SYSTEM HAVING PLURAL CODING VOCABULARIES

摘要

A system for providing differently coded signals to represent respective different types of information such as the indicia and margin portions of a document. As a result of successive line scans of the document a sequence of message symbols is generated for each line scan in which each sequence is differently coded to respectively represent areas of different nature along the scan line. Typically the areas of different nature are margin and indicia portions of the document. The scanning of the margin areas of the document can be selectively controlled to minimize coding of areas of margin information.