Patent ID: 8294751

Claim:
An electronic endoscope system composed of an electronic endoscope and a processor, including: A. said electronic endoscope including: an imaging sensor for obtaining an image of an observation area of a subject and outputting analog image signals; an A/D converter for converting said analog image signals into digital image signals; a synchronizing signal encoder for encoding a vertical synchronizing signal and a horizontal synchronizing signal into synchronization codes representing ON/OFF states thereof by several maximums and minimums of signal levels for representing said digital image signals, using a maximum and a minimum signal level except said signal levels representing said synchronization codes to express said digital image signals which would normally be represented by said signal levels representing said synchronization codes, and replacing said digital image signals corresponding to said several maximums and minimums with a maximum and a minimum of remaining signal levels, while said image signals whose levels are not in said signal levels representing said synchronization codes are not subject to change; a modulating section for applying a digital quadrature modulation to said synchronization codes and said image signals to generate RF signals; and a transmitter for transmitting said RF signals to said processor as a radio wave; B. said processor including: a receiver for receiving said RF signals transmitted from said transmitter; a demodulating section for demodulating said RF signals into said image signals by digital quadrature detection; a synchronizing signal decoder for decoding said vertical synchronizing signal and said horizontal synchronizing signal based on said synchronization codes; and an image signal processing section for generating an endoscopic image from said image signals.