Title:
METHOD OF IMPROVING SIGNAL-TO-NOISE RATIO OF SCANNING SIGNAL DEPENDING UPON TIME OBTAINED THROUGH PERIODIC SCANNING METHOD
Document Type and Number:
Japanese Patent JPS5892876
Kind Code:
A
Abstract:
A method of increasing the signal-to-noise ratio of a time-dependent scanning signal produced during a periodic scanning operation wherein a defined or bounded and centered field is scanned line-by-line by means of a scanning device, there is produced a time-dependent supplementary or additional signal corresponding to the spacing of the momentarily scanned location from the center of the field and possessing a momentary value r as well as a maximum value R. Successive line scans occur in directions which in each instance differ from one another by a predetermined angle in such a manner that as a function of the line width the neighboring lines successively adjoin one another at the field boundary and within the field partially overlap and at the field center completely overlap. From the scanning signal there is produced a multiplicity of primary signals forming a sequence, which in this sequence possess a stepwise time-delay which in each case increases by a period of the line scanning. From the supplementary signal there is produced a multiplicity of auxiliary signals, a respective auxiliary signal is multiplied in a respective multiplier with a respective associated primary signal for producing a respective intermediate signal, and the intermediate signals are summated in an adder for producing an output signal.
Inventors:
HANSUIERUKU SHIYUREEPUFUERU
Application Number:
JP11787182A
Publication Date:
June 02, 1983
Filing Date:
July 08, 1982
Export Citation:
Assignee:
CONTRAVES AG
International Classes:
H04N5/33; F41G7/22; G01S3/78; G01S3/781; G01S3/782; G01S3/786; H04N3/00; (IPC1-7): G01S3/78; H04N5/33
Attorney, Agent or Firm:
Ezaki Mitsuyoshi