EP0649261A2
Expired / Lapsed
EP
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Image data processing and encrypting apparatus
Assignee: Canon Inc
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Filing: 1994-10-17
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Granted: —
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Expires: 2014-10-17
Abstract
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. An image processing apparatus for separating input image data into low resolution image data and at least one auxiliary image data for interpolating the low resolution image data and decoding the image data with at least one of the auxiliary image data being encrypted decrypts the encrypted auxiliary image data and synthesizes the low resolution image data with the auxiliary image data. <IMAGE>
Inventors
- 👤 Masahiko C/O Canon Kabushiki Kaisha Enari
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 15:32
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/234; H04N21/2343; H04N21/234327; H04N19/00; H04N19/60; H04N19/61; H04N19/63; H04N21/2347; H04N21/23476; H04N21/25; H04N21/266; H04N21/2662; H04N7/00; H04N7/16; H04N7/167; H04N7/1675; H04N7/24; H04N19/30
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
52 words
An image processing apparatus comprising: a) input means for inputting an image signal; b) division means for dividing the image signal inputted from said input means to a plurality of frequency band signal groups; and c) encryption means for encrypting at least one of the signal groups divided by said division means.
Claim 2
Dependent Claim
22 words
An image processing apparatus according to Claim 1, further comprising: encoding means for encoding the signal groups divided by said division means.
Claim 3
Dependent Claim
19 words
An image processing apparatus according to Claim 2, wherein said encoding means conducts block encoding by using orthogonal transform.
Claim 4
Dependent Claim
18 words
An image processing apparatus according to Claim 2, further comprising: multiplexing means for multiplexing the encoded signal groups.
Claim 5
Dependent Claim
53 words
An image processing apparatus comprising: a) input means for inputting an image signal; b) conversion means for converting the image signal inputted from said input means to a plurality of image signals of different resolutions; and c) encryption means for encrypting at least one of the image signals converted by said conversion means.
Claim 6
Dependent Claim
22 words
An image processing apparatus according to Claim 5, further comprising: encoding means for encoding the image signals converted by said conversion means.
Claim 7
Dependent Claim
19 words
An image processing apparatus according to Claim 6, wherein said encoding means conducts block encoding by using orthogonal transform.
Claim 8
Dependent Claim
18 words
An image processing apparatus according to Claim 6, further comprising: multiplexing means for multiplexing the encoded image signals.
Claim 9
Dependent Claim
61 words
An image processing apparatus for dividing an image signal into a plurality of frequency band signal groups and decoding the divided signal groups with at least one of the signal groups being encrypted, comprising: a) decryption means for decrypting the encrypted signal group and b) synthesization means for synthesizing the signal group decrypted by said decryption means with other signal groups.
Claim 10
Dependent Claim
29 words
An image processing apparatus according to Claim 9, wherein said signal groups are encoded and said image processing apparatus further comprises decoding means for decoding the encoded signal groups.
Claim 11
Dependent Claim
28 words
An image processing apparatus according to Claim 9, wherein the output of the encrypted signal group is inhibited when said decryption means cannot decrypt the encrypted signal group.
Claim 12
Dependent Claim
31 words
An image processing apparatus according to Claim 9, wherein a predetermined signal is produced in lieu of the encrypted signal group when said decryption means cannot decrypt the encrypted signal group.
Claim 13
Dependent Claim
63 words
An image processing apparatus for dividing an input image signal into a plurality of image signals of different resolutions and decoding the divided image signals with at least one of the image signals being encrypted, comprising: a) decryption means for decrypting the encrypted image signal; and b) synthesization means for synthesizing the image signal decrypted by said decryption means with other image signals.
Claim 14
Dependent Claim
29 words
An image processing apparatus according to Claim 13, wherein said image signals are encoded and said image processing apparatus further comprises decoding means for decoding the encoded image signals.
Claim 15
Dependent Claim
28 words
An image processing apparatus according to Claim 13, wherein the output of the encrypted image signal is inhibited when said decryption means cannot decrypt the encrypted image signal.
Claim 16
Dependent Claim
31 words
An image processing apparatus according to Claim 13, wherein a predetermined signal is produced in lieu of the encrypted image signal when said decryption means cannot decrypt the encrypted image signal.
Claim 17
Dependent Claim
46 words
An image processing apparatus comprising: a) separation means for separating input image data into low resolution image data and one or more auxiliary image data for interpolating said low resolution image data; and b) encryption means for encrypting at least one of the auxiliary image data.
Claim 18
Dependent Claim
22 words
An image processing apparatus according to Claim 17, further comprising: encoding means for encoding the image data separated by said separation means.
Claim 19
Dependent Claim
22 words
An image processing apparatus according to Claim 17, further comprising: synthesization means for synthesizing the image data encoded by said encoding means.
Claim 20
Dependent Claim
71 words
An image processing apparatus for separating input image data into low resolution image data and one or more auxiliary image data for interpolating said low resolution image data and decoding the image data with at least one of the auxiliary image data being encrypted, comprising: a) decryption means for decrypting the encrypted auxiliary image data; and b) synthesization means for synthesizing the low resolution image data with the auxiliary image data.
Claim 21
Dependent Claim
42 words
An image processing apparatus according to Claim 20, wherein said low resolution image data and said auxiliary image data are encoded, and said image processing apparatus further comprises decoding means for decoding the encoded low resolution image data and auxiliary image data.
Claim 22
Dependent Claim
29 words
An image processing apparatus according to Claim 20, wherein the output of the encrypted auxiliary image data is inhibited when said decryption means cannot decrypt the encrypted image data.
Claim 23
Dependent Claim
32 words
An image processing apparatus according to Claim 20, wherein a predetermined signal is outputted in lieu of the encrypted auxiliary image data when said decryption means cannot decrypt the encrypted image data.
Claim 24
Dependent Claim
46 words
An image processing apparatus comprising: a) separation means for separating input image data into low resolution image data and one or more auxiliary image data for interpolating said low resolution image data; and b) mask means for masking at least one of the auxiliary image data.
Claim 25
Dependent Claim
22 words
An image processing apparatus according to Claim 24, further comprising: encoding means for encoding the image data separated by said separation means.
Claim 26
Dependent Claim
22 words
An image processing apparatus according to Claim 24, further comprising: synthesization means for synthesizing the image data encoded by said encoding means.
Claim 27
Dependent Claim
46 words
A video transmission system wherein one or more auxiliary video signals are transmitted with a basic video signal, so as to enable reproduction of basic quality images or higher quality images, wherein the or each auxiliary signal is subjected to encryption independently of the basic signal.
Claim 28
Dependent Claim
46 words
A record carrier or signal conveying video information, wherein images are encoded at a basic quality level and a higher quality level by means of basic and auxiliary signal components, and wherein at least one auxiliary signal component is encrypted independently of the basic signal component.
References Cited (Backward Citations)
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