Transmitter, signal transmitting method, data distributing system and its method, data receiver, data providing device and its method and data transmitter
First Claim
1. A transmitter comprising:
- a transmission processing means for transferring a content signal or processing copyright protection on a content signal and then transferring the processed content signal and a transmission controlling means for holding information indicating a receiver which does not have a function enabling copying of content by using the content signal or the processed content signal transferred from the transmission processing means and controlling output of the signal to be transferred from the transmission processing means according to whether or not information indicating the receiver which is connected to the transmission processing means is included in the held information.
1 Assignment
0 Petitions
Accused Products
Abstract
To enable usage of content at a receiver which does not have a copying function even if copyright protection is provided. Model names of receivers not having a function enabling copying of content are held in an authentication processing circuit (151) of a transmitter (10). When a model name obtained from a connected receiver (40) is held, regardless of whether the content is copyright protected, a signal selection circuit (122) selects a terminal a side, a switch (123) is turned on, and an unencrypted signal is transmitted. When a change of the receiver (40) is detected by a hot plug detection function or a plug and play function at a processing circuit (152) during the transfer of a signal of copyright protected content without providing copyright protection, the selection circuit (122) is made to select a terminal b side or the switch (123) is turned off to suspend the transfer of the non-copyright protected signal. The information indicating the receiver is held in a tamper-proof updateable manner.
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Citations
45 Claims
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1. A transmitter comprising:
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a transmission processing means for transferring a content signal or processing copyright protection on a content signal and then transferring the processed content signal and a transmission controlling means for holding information indicating a receiver which does not have a function enabling copying of content by using the content signal or the processed content signal transferred from the transmission processing means and controlling output of the signal to be transferred from the transmission processing means according to whether or not information indicating the receiver which is connected to the transmission processing means is included in the held information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A signal transfer method including of the steps of
holding in a transmitter information indicating receivers not having the function of being able to receive a content signal to copy the content and controlling the output of the content signal or copyright protected content signal at the transmitter according to whether or not information indicating a connected receiver is included in the held information.
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12. A data distribution system comprising:
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a data providing means for adding first control information for controlling a usage state of the content data to the intended content data and providing the result as the data to be distributed, a data transmitting means for performing predetermined second encryption on said provided data to be distributed and transmitting the encrypted data to be distributed, and a data receiving means for receiving said transmitted encrypted data to be distributed, performing decryption of said second encryption, detecting said first control information from the decrypted data to be distributed, and controlling the output of said content data based on the detected first control information.
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20. A data distribution method including the steps of
adding first control information for controlling a usage state of content data to intended content data based on an instruction of an owner of the content data and providing the result as the data to be distributed, performing predetermined second encryption on said provided data to be distributed, transmitting the encrypted data to be distributed, receiving said transmitted encrypted data to be distributed at any receiver, performing the decryption of said second encryption, detecting said first control information from the decrypted data to be distributed, and controlling the output of said content data based on the detected first control information.
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28. A data receiver for receiving a signal comprised of data to be distributed including intended content data plus first control information for controlling a usage state of the content data and transmitted after performing predetermined second encryption, comprising
a receiving means for receiving said transmitted signal, a second decrypting means for performing decryption of said second encryption with respect to said received signal, a first control information detecting means for detecting said first control information from said decrypted data to be distributed, and an output controlling means for controlling the output of said content data based on said detected first control information.
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38. A data provider comprising
a control information adding means for adding control information for controlling a usage state of content data designated by an owner of the content data to intended content data and provides the content data with said control information added thereto as data to be distributed.
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43. A data providing method including the steps of
adding control information for controlling a usage state of content data designated by an owner of content data to intended content data, encrypting said content data with the control information added thereto by a predetermined method, and providing the encrypted content data as the data to be distributed.
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45. A data transferer comprising
an encrypting means for further encrypting, by a predetermined method, data to be distributed including intended content data plus control information for controlling a usage state of said content data designated by an owner of the content data and encrypted by a predetermined scheme and a transferring means for transferring said encrypted data to be distributed to any channel.
Specification