초록 ▼

A sonar signal processing and display system is described which converts analog return data to digital form for storage in a magnetic core memory, from which the data can be reconstituted as analog video signals for CRT display at a higher frame rate. Described are means for comparing new data to ol

A sonar signal processing and display system is described which converts analog return data to digital form for storage in a magnetic core memory, from which the data can be reconstituted as analog video signals for CRT display at a higher frame rate. Described are means for comparing new data to old to select updating data for the memory, and means for effecting CRT display of moving target tracks in a color distinct from stationary background returns.

대표청구항 ▼

A sonar signal processing and display system for use with a source of analog sonar return signals, transmitter sync signals, scanner clock signals, and line sync signals, said system comprising: memory means for storing and reading out data in multi-bit digital word form; sample and hold means for p

A sonar signal processing and display system for use with a source of analog sonar return signals, transmitter sync signals, scanner clock signals, and line sync signals, said system comprising: memory means for storing and reading out data in multi-bit digital word form; sample and hold means for periodically sampling said analog return signals; analog to digital converter means, connected to said sample and hold means, for converting samples of said analog return signals into digital word signals; first data register means, connected to said analog to digital converter means, for accumulating a predetermined number of digital words; transfer means, connected between said first data register means and said memory means, for effecting transfer of said digital words for storage in said memory means; input control logic circuit means for controlling said sample and hold means, said first data register means, said transfer means, and said memory means in response to said transmitter sync signals, said scanner clock signals, and said line sync signals to effect said converting and said storage at a predetermined sonar frame rate and at addresses in said memory means corresponding to locations in the sonar field of observation; second data register means, connected to said memory means, for temporarily storing said words in a one at a time sequence as they are read out of said memory means; digital to analog conversion means, connected to said second data register means, for converting said digital words temporarily stored therein into analog output signals; cathode ray tube display means connected to said digital to analog conversion means, for generating a display of said analog output signals; and output control logic circuit means for controlling said memory means, said second data register means, said digital to analog conversion means, and said display means so as to display said analog output signals at a display frame rate which is a multiple of said predetermined sonar frame rate.