Abstract: An image processing apparatus separates input image data into low resolution image data and one or more auxiliary image data for interpolating the low resolution image data, and decrypts at least one of the separated auxiliary image data. The image processing apparatus also separates input image data into low resolution image data and at least one auxiliary image data for interpolating the low resolution image data and decodes the image data with at least one of the auxiliary image data being encrypted, and decrypts the encrypted auxiliary image data and synthesizes the low resolution image data with the auxiliary image data.

Abstract: A home banking system comprises a video games entertainment console 10 having a processor 12, a display driver 14, connection means 16 for connection to a television set 17, and an input/output device 20. Such a conventional console 10 is converted to a home banking terminal by an encrypting modem 24 connected into the cartridge slot 26 of the console 10, the encrypting modem having a cartridge slot 30 into which an application cartridge 32 carrying a home banking program can be loaded.

Abstract: Audio signals are scrambled by inverting the original; frequency spectrum so that frequency portions originally lying at the lower end of the audio frequency band are shifted to the upper end while those portions originally lying near the upper end of the band are shifted to the lower end. A pilot tone of known frequency is recorded along with the frequency shifted audio signals, along with accompanying video signal portions. Upon reproduction, any variations in phase and frequency introduction by the recording or reproduction process are tracked by the pilot tone, which is used to generate the demodulation signal for restoring the original frequency content of the audio signals.