Information signal processing unit

Abstract

Abstract A new additional information generating section (12) generates new additional information FS1 based upon information from an additional information reading section (11). The spectrum of the new additional information FS1 is spread by an SS additional information generating section (14) and supplied to a signal superimposing section (15) as SS additional information SF1. The signal superimposing section (15) generates a digital video signal S2 by superimposing the SS additional information SF1 on a digital video signal S1. A writing section (16) records the digital video signal S2 on which the SS additional information SF1 is superimposed on a recording medium (100). Hereby, adding additional information to an information signal without deteriorating the quality of the read information signal so that the falsification and deletion are disabled, detecting the additional information added to the information signal if necessary and utilizing it are enabled. <IMAGE>

Inventors

• 👤 Akira Ogino

Bibliographic Details