US6061452A
Expired / Lapsed
US
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Secure media on demand system whereby charge is determined in part from the periodicity of an encryption key
Assignee: Canon Inc
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Filing: 1997-11-25
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Granted: 2000-05-09
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Expires: 2017-11-25
Abstract
Abstract An object of the invention is to provide a transmitting system of which data is difficult to be tapped and which is suitable for flexibly determining a watching and listening fee. In order to achieve the object, there is provided a combination of a transmitting method comprising steps of, transmitting encoded data which has been encoded, to a receiving side, changing the encoding in a predetermined unit, and performing recording according to requirement, from the receiving side of information concerning decoding of the encoded data, and a receiving method comprising steps of, receiving the encoded data which has been encoded, from a transmitting side, requiring the information concerning the decoding of the encoded data, to the transmitting side, and decoding the encoded data by using the obtained information concerning the decoding.
Inventors
- 👤 Shigeo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:31
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/1675; G; G06; G06Q; G06Q20/00; G06Q20/02; G06Q20/027; G06Q20/08; G06Q20/085; G06Q20/0855; G06Q20/38; G06Q20/382; G06Q20/3829; H04N21/00; H04N21/20; H04N21/23; H04N21/234; H04N21/2347; H04N21/25; H04N21/254; H04N21/2543; H04N21/40; H04N21/43; H04N21/432; H04N21/4325; H04N21/433; H04N21/4334; H04N21/44; H04N21/4405; H04N21/47; H04N21/472; H04N21/47202; H04N21/60; H04N21/63; H04N21/633; H04N21/6332; H04N21/6334; H04N21/63345; H04N21/65; H04N21/658; H04N21/6581
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
297 words
A transmitting system comprising: a transmitting system includes, image/audio data input means for inputting image and audio data, key generating means for generating a key for new encoding at a predetermined time interval, by using a key encoding system, data encoding means for encoding the image and audio data inputted by said image/audio data input means, in the encoding system by using the key generated by said key generating means, data transmitting means for transmitting the image and audio data encoded by said data encoding means, to a receiving system through digital transmitting media, key transmitting means for transmitting information according to the key generated by said key generating means, to the receiving system from which watching and listening requirement was issued, and recording means for recording information according to the watching and listening requirement, for each watching and listening person; and said receiving system includes, watching and listening requiring means for issuing the watching and listening requirement to said transmitting system at predetermined time interval, in accordance with requirement from the watching and listening person, receiving means for receiving information according to the key transmitted by said transmitting system in response to the watching and listening requirement by said watching and listening requiring means, and data decoding means for receiving the encoded image and audio data transmitted from said transmitting system through the digital transmitting media, decoding the received data by using the information received by said receiving means, and outputting the decoded data, wherein said watching and listening requiring means continuously issues the watching and listening requirement to said transmitting system every predetermined unit time while the watching and listening person wishes the watching and listening, and stops issuing the watching and listening requirement when the watching and listening person terminates the watching and listening.
Claim 2
Dependent Claim
297 words
A transmitting system comprising: a transmitting system includes, image/audio data input means for inputting image and audio data, key generating means for generating a key for new encoding at a predetermined time interval, by using a key encoding system, data encoding means for encoding the image and audio data inputted by said image/audio data input means, in the encoding system by using the key generated by said key generating means, data transmitting means for transmitting the image and audio data encoded by said data encoding means, to a receiving system through digital transmitting media, key transmitting means for transmitting information according to the key generated by said key generating means, to the receiving system from which watching and listening requirement was issued, and recording means for recording information according to the watching and listening requirement, for each watching and listening person; and said receiving system includes, watching and listening requiring means for issuing the watching and listening requirement to said transmitting system at predetermined time interval, in accordance with requirement from the watching and listening person, receiving means for receiving information according to the key transmitted by said transmitting system in response to the watching and listening requirement by said watching and listening requiring means, and data decoding means for receiving the encoded image and audio data transmitted from said transmitting system through the digital transmitting media, decoding the received data by using the information received by said receiving means, and outputting the decoded data, wherein said watching and listening requiring means continuously issues the watching and listening requirement to said transmitting system every predetermined unit time while the watching and listening person wishes the watching and listening, and stops issuing the watching and listening requirement when the watching and listening person terminates the watching and listening.
Claim 3
Dependent Claim
27 words
A system according to claim 1, wherein said data transmitting means transmits the image and audio data after encoding them by using a symmetrical key encoding system.
Claim 4
Dependent Claim
27 words
A system according to claim 1, wherein said key transmitting means stops transmitting the key when there is no watching and listening requirement from said receiving system.
Claim 5
Dependent Claim
31 words
A system according to claim 1, wherein said transmitting system is capable of charging by recording from what time and how many the keys changed every predetermined unit time were transmitted.
Claim 6
Dependent Claim
73 words
A transmitting apparatus comprising: transmitting means for transmitting encoded data which has been encoded, to a receiving side; changing means for changing the encoding in a predetermined unit; and recording means for performing recording according to requirement, from the receiving side, of information concerning decoding of the encoded data, wherein said transmitting apparatus is capable of charging by recording from what time and how many keys changed every predetermined unit time were transmitted.
Claim 7
Dependent Claim
73 words
A transmitting apparatus comprising: transmitting means for transmitting encoded data which has been encoded, to a receiving side; changing means for changing the encoding in a predetermined unit; and recording means for performing recording according to requirement, from the receiving side, of information concerning decoding of the encoded data, wherein said transmitting apparatus is capable of charging by recording from what time and how many keys changed every predetermined unit time were transmitted.
Claim 8
Dependent Claim
25 words
An apparatus according to claim 5, wherein said transmitting means transmits image and audio data after encoding them by using a symmetrical key encoding system.
Claim 9
Dependent Claim
24 words
An apparatus according to claim 5, wherein said transmitting means stops transmitting when there is no watching and listening requirement from the receiving side.
Claim 10
Dependent Claim
76 words
A storing medium for storing, in a computer readable state, the steps of: changing, in case of transmitting encoded data which has been encoded to a receiving side, an encoding key in a predetermined unit; and performing recording according to requirement, from the receiving side, of information concerning decoding of the encoded data, wherein a transmitting side is capable of charging by recording from what time and how many keys changed every predetermined time were transmitted.
Claim 11
Dependent Claim
76 words
A storing medium for storing, in a computer readable state, the steps of: changing, in case of transmitting encoded data which has been encoded to a receiving side, an encoding key in a predetermined unit; and performing recording according to requirement, from the receiving side, of information concerning decoding of the encoded data, wherein a transmitting side is capable of charging by recording from what time and how many keys changed every predetermined time were transmitted.
Claim 12
Dependent Claim
24 words
A medium according to claim 8, wherein transmitting side transmits image and audio data after encoding them by using a symmetrical key encoding system.
Claim 13
Dependent Claim
24 words
A medium according to claim 8, wherein the transmitting side stops transmitting when there is no watching and listening requirement from the receiving side.
Claim 14
Dependent Claim
96 words
A storing medium for storing, in a computer readable state, the steps of: receiving encoded data which has been encoded, from a transmitting side; requiring information concerning decoding of the encoded data to the transmitting side; and decoding the encoded data by using the obtained information concerning the decoding, wherein said requiring step continuously issues watching and listening requirement to the transmitting side every predetermined unit time while a watching and listening person wishes watching and listening, and stops issuing the watching and listening requirement when the watching and listening person terminates the watching and listening.
Claim 15
Dependent Claim
96 words
A storing medium for storing, in a computer readable state, the steps of: receiving encoded data which has been encoded, from a transmitting side; requiring information concerning decoding of the encoded data to the transmitting side; and decoding the encoded data by using the obtained information concerning the decoding, wherein said requiring step continuously issues watching and listening requirement to the transmitting side every predetermined unit time while a watching and listening person wishes watching and listening, and stops issuing the watching and listening requirement when the watching and listening person terminates the watching and listening.
Claim 16
Dependent Claim
270 words
A transmitting system comprising: a transmitting system includes, image/audio data input means for inputting image and audio data, key generating means for generating a key for new encoding at a predetermined time interval, by using a key encoding system, data encoding means for encoding the image and audio data inputted by said image/audio data input means, in the encoding system by using the key generated by said key generating means, data transmitting means for transmitting the image and audio data encoded by said data encoding means, to a receiving system through digital transmitting media, key transmitting means for transmitting information according to the key generated by said key generating means, to the receiving system from which watching and listening requirement was issued, and recording means for recording information according to the watching and listening requirement, for each watching and listening person; and said receiving system includes, watching and listening requiring means for issuing the watching and listening requirement to said transmitting system at predetermined time interval, in accordance with requirement from the watching and listening person, receiving means for receiving information according to the key transmitted by said transmitting system in response to the watching and listening requirement by said watching and listening requiring means, and data decoding means for receiving the encoded image and audio data transmitted from said transmitting system through the digital transmitting media, decoding the received data by using the information received by said receiving means, and outputting the decoded data, wherein said transmitting system is capable of charging by recording from what time and how many the keys changed every predetermined unit time were transmitted.
Claim 17
Dependent Claim
270 words
A transmitting system comprising: a transmitting system includes, image/audio data input means for inputting image and audio data, key generating means for generating a key for new encoding at a predetermined time interval, by using a key encoding system, data encoding means for encoding the image and audio data inputted by said image/audio data input means, in the encoding system by using the key generated by said key generating means, data transmitting means for transmitting the image and audio data encoded by said data encoding means, to a receiving system through digital transmitting media, key transmitting means for transmitting information according to the key generated by said key generating means, to the receiving system from which watching and listening requirement was issued, and recording means for recording information according to the watching and listening requirement, for each watching and listening person; and said receiving system includes, watching and listening requiring means for issuing the watching and listening requirement to said transmitting system at predetermined time interval, in accordance with requirement from the watching and listening person, receiving means for receiving information according to the key transmitted by said transmitting system in response to the watching and listening requirement by said watching and listening requiring means, and data decoding means for receiving the encoded image and audio data transmitted from said transmitting system through the digital transmitting media, decoding the received data by using the information received by said receiving means, and outputting the decoded data, wherein said transmitting system is capable of charging by recording from what time and how many the keys changed every predetermined unit time were transmitted.
Claim 18
Dependent Claim
96 words
A receiving apparatus comprising: receiving means for receiving encoded data which has been encoded, from a transmission side; requiring means for requiring information concerning decoding of the encoded data, to the transmitting side; and decoding means for decoding the encoded data by using the obtained information concerning the decoding, wherein said requiring means continuously issues watching and listening requirement to the transmitting side every predetermined unit time while a watching and listening person wishes watching and listening, and stops issuing the watching and listening requirement when the watching and listening person terminates the watching and listening.
Claim 19
Dependent Claim
96 words
A receiving apparatus comprising: receiving means for receiving encoded data which has been encoded, from a transmission side; requiring means for requiring information concerning decoding of the encoded data, to the transmitting side; and decoding means for decoding the encoded data by using the obtained information concerning the decoding, wherein said requiring means continuously issues watching and listening requirement to the transmitting side every predetermined unit time while a watching and listening person wishes watching and listening, and stops issuing the watching and listening requirement when the watching and listening person terminates the watching and listening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-09 | 2003-11-08 | 2004-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-09 | 2007-11-08 | 2008-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-09 | 2011-11-08 | 2012-05-09 | $7700.00 | Window Closed / Lapsed |