System for coding two-dimensional information

System for compensating for incorrect duty factor when reading o

System for conducting a television audience survey

System for converting frequency band of picture signal

System for converting the number of lines of a television signal

System for determining the contour of a plane form

System for evaluating similar objects

System for improving the evaluation of pictures comprising detai

System for producing a correction signal for the aperture correc

System for reducing the transmission time of similar portions of

System for scanning information recorded on a plurality of magaz

System for use in television receivers for providing improved sh

Systems for eliminating high-frequency disturbances in televisio

Technique for minimizing multi-path distortion effects in video

Telereproduction system for documents

Television aperture correction system having gateable coring mea

Television apparatus suitable for video signal analysis

Television camera arrangement in which electrically generated da

Television camera measuring devices

Television display utilizing local area brightness control