Digital information recording apparatus, reproducing apparatus and transmitting apparatus

Patent metadata

Field	Value
Publication number	US-10529372-B2
Application number	US-201715690640-A
Country	US
Kind code	B2
Filing date	Aug 30, 2017
Priority date	Dec 13, 2000
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A digital information recording apparatus includes a recording circuit for recording information of a retention period included in the digital information and indicating a period for permitting the digital information to be held in the recording medium, starting with a time at which the digital information is recorded on the recording medium; and information of a playback permission period included in the digital information and indicating a period for permitting the digital information to be played back starting with a time at which the information is reproduced initially following recording of the digital information on the recording medium, permitting temporary recording or copying for the information permitted for “copy never” or “copy one generation.”

First claim

What is claimed is:

1. A reproducing system, comprising:
a receiver configured to receive an audio/video information encrypted according to a predetermined encryption method and control information related to the audio/video information, the control information for controlling reproduction of the audio/video information after distribution and at a location different from a distribution location;
a memory configured to at least temporarily store at least a portion of the audio/video information and at least a portion of the control information;
a detector configured to detect at least a portion of the control information, including data indicative of a first period for enabling a reproduction of the audio/video information and disabling reproduction after expiration of a prescribed time and a second period, that begins at a start of an initial reproduction of the audio/video information within the first period and is shorter than the first period, for enabling a reproduction of the audio/video information and disabling reproduction after expiration of a prescribed time following the start of the initial reproduction of the audio/video information;
a decryptor configured to decrypt the audio/video information encrypted according to the predetermined encryption method;
a reproducer configured to reproduce at least a portion of the audio/video information from the memory consistent with restrictions associated with the first period and the second period through decryption by the decryptor; and
a controller configured to control at least the reproducer,
wherein, in a case where the controller confirms that an elapsed time from a start of the first period is within the first period and an elapsed time from a start of an initial reproduction of the audio/video information is within the second period, the controller is configured to, based on at least a portion of the control information detected by the detector, allow the reproducer to reproduce the audio/video information,
wherein, in a case where the controller confirms that a reproduction of the audio/video information is started before an end of the first period and the reproduction is continuing at the end of the first period, the controller is configured to, based on at least a portion of the control information detected by the detector, allow the reproducer to reproduce the audio/video information to an end of the audio/video information beyond the end of the first period and thereafter not allow the reproducer to start an another reproduction of the audio/video information even if an elapsed time from a start of an initial reproduction of the audio/video information is within the second period.

2. The reproducing system according to claim 1 ,
wherein the audio/video information is embedded with at least a portion of the control information.

3. The reproducing system according to claim 1 ,
wherein the control information is embedded as a watermark in the audio/video information.

4. The reproducing system according to claim 1 ,
wherein the control information includes data indicative of user identification information for permitting a specified user to reproduce the audio/video information.

5. The reproducing system according to claim 1 ,
wherein the reproduction to the end of the audio/video information beyond the end of the first period is enabled if the reproduction is not stopped.

6. The reproducing system according to claim 1 ,
wherein the memory is configured to keep storing the audio/video information after the end of the first period, and a start of a reproduction is disabled after the end of the first period.

7. A reproducing system, comprising:
a receiver configured to receive an audio/video information which is encrypted according to a predetermined encryption method and is restricted from reproduction based on at least a portion of control information, including data indicative of a first period for enabling a reproduction of the audio/video information and disabling reproduction after expiration of a prescribed time and a second period, that begins at a start of an initial reproduction of the audio/video information within the first period and is shorter than the first period, for enabling a reproduction of the audio/video information and disabling reproduction after expiration of a prescribed time following the start of the initial reproduction of the audio/video information;
a decryptor configured to decrypt the audio/video information encrypted according to the predetermined encryption method and received by the receiver;
a reproducer configured to reproduce at least a portion of the audio/video information consistent with restrictions associated with the first period and the second period through decryption by the decryptor; and
a controller configured to control at least the reproducer,
wherein, in a case where the controller confirms that an elapsed time from a start of the first period is within the first period and an elapsed time from a start of an initial reproduction of the audio/video information is within the second period, the controller is configured to, based on at least a portion of the control information, allow the reproducer to reproduce the audio/video information,
wherein, in a case where the controller confirms that a reproduction of the audio/video information is started before an end of the first period and the reproduction is continuing at the end of the first period, the controller is configured to, based on at least a portion of the control information, allow the reproducer to reproduce the audio/video information to an end of the audio/video information beyond the end of the first period and thereafter not allow the reproducer to start an another reproduction of the audio/video information even if an elapsed time from a start of an initial reproduction of the audio/video information is within the second period.

8. The reproducing system according to claim 7 ,
wherein the control information includes data indicative of user identification information for permitting a specified user to reproduce the audio/video information.

9. The reproducing system according to claim 7 ,
wherein the reproduction to the end of the audio/video information beyond the end of the first period is enabled if the reproduction is not stopped.

10. A transmitting system, comprising:
a receiver configured to receive a request of a user;
a transmitter configured to transmit an audio/video information to an external reproducing system in response to the request of the user, wherein the audio/video information is encrypted according to a predetermined encryption method and is restricted from reproduction based on at least a portion of control information, including data indicative of a first period for enabling a reproduction of the audio/video information and disabling reproduction after expiration of a prescribed time and a second period, that begins at a start of an initial reproduction of the audio/video information within the first period and is shorter than the first period, for enabling a reproduction of the audio/video information and disabling reproduction after expiration of a prescribed time following the start of the initial reproduction of the audio/video information;
wherein at least a portion of the control information is for controlling a reproduction of the external reproducing system, in a case where an elapsed time from a start of the first period is within the first period and an elapsed time from a start of an initial reproduction of the audio/video information is within the second period, to allow the reproduction of the audio/video information by the external reproducing system, and, in a case where a reproduction o

Assignees

• Maxell Ltd

Inventors

• Okamoto Hiroo
• Owashi Hitoaki
• Yoshioka Atsushi

Classifications

• H04N5/76

  Television signal recording · CPC title

• H04N21/4627

  Rights management {associated to the content (security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08)} · CPC title

• H04N21/4334

  Recording operations (recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27) · CPC title

• H04N2005/91328

  the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS] · CPC title

• H04N21/4542

  Blocking scenes or portions of the received content, e.g. censoring scenes · CPC title