Back to results
US 5,852,663 AGranted
Information signal transmission system
AssigneeCanon Kabushiki Kaisha
InventorMasahiko Enari
Life of this patent
Estimating the term…
Abstract
The information signal transmission system of the present invention is so designed as to convert the analog information signal into digital information data and to transmit these digital data after enciphering a part of the digital data. It can therefore maintain the secrecy of the transmitted information signal and can employ a low-speed enciphering process, thereby reducing the magnitude of hardware and reducing its cost.
Claims12
An image processing method, comprising steps of:
- a) inputting predictive encoded image data and reference image data which has been used for predictive encoding the predictive encoded data;
- b) encrypting the reference image data;
- and
- c) outputting the predictive encoded image data without encrypting and the encrypted reference image data, wherein an amount of data of the reference image data per a unit of image is larger than that of the predictive encoded image data.
1 more element
An image processing device, comprising:
- a) inputting means for inputting predictive encoded image data and reference image data which has been used for predictive encoding the predictive encoded data;
- b) encrypting means for encrypting the reference image data;
- and
- c) outputting the predictive encoded image data without encrypting and the encrypted reference image data, wherein an amount of data of the reference image data per a unit of image is larger than that of the predictive encoded image data.
1 more element
An image processing method, comprising steps of:
- a) inputting first image data and second image data, the second image data having larger amount of information per a unit of image than the first image data;
- b) encrypting the second image data;
- c) outputting the first image data without encrypting;
- and
- d) outputting the encrypted second image data.
2 more elements
An image processing device, comprising:
- a) inputting means for inputting first image data and second image data, the second image data having larger amount of information per a unit of image than the first image data;
- b) encrypting means for encrypting the second image data;
- c) means for outputting the first image data without encrypting;
- and
- d) means for outputting the encrypted second image data.
2 more elements
Dependencies are inferred from the claim text.