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US 7,065,211 B1Granted
Signal reproducing/recording/transmitting method and apparatus and signal recording medium
AssigneeSony Corporation
InventorsYoichiro Sako, Shigeyuki Yoneyama
Life of this patent
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Abstract
A video signal reproduction system for receiving a video signal transmitted via a satellite communication link at a receiving device. A copy permission indicator is inserted in the received video signal. The copy permission indicator is generated on the basis of copy management information that has been appended to the video signal and detected by the system. The indicator is in the form of a multiple of coded bits which are arrayed at a pre-set position in the video signal and are operable to indicate a generation limitation on copying of the video signal.
Claims58
A method for reproducing a video signal, comprising the steps of:
- receiving a video signal with appended copy management information at a reproducing device via a satellite communication link;
- said copy management information including an indicator of whether copying of only digital data is inhibited or copying of both digital data and analog signals is inhibited;
- detecting said copy management information that has been appended to the video signal;
- providing a copy permission indicator in the received video signal by generating a protect code signal based on said copy management information, said protect code signal having plural coded bits and being operable to indicate a generation limitation on copying of the video signal, and arraying said protect code signal at a pre-set position in the video signal;
- and
- performing a pre-set conversion operation on said digital data and/or an analog signal generated from said digital data, based on said copy management information;
- wherein said pre-set conversion operation for said analog signal includes a color burst inverting operation in which the phase of a front part of a color burst signal in said analog signal is inverted.
4 more elements
A method for reproducing a video signal of the type having a vertical blanking interval and sync pulses, comprising the steps of:
- receiving a video signal with appended copy management information at a reproducing device via a satellite communication link;
- said copy management information including an indicator of whether copying of only digital data is inhibited or copying of both digital data and analog signals is inhibited;
- detecting said copy management information that has been appended to the video signal;
- generating a copy protection signal based on said copy management information;
- inserting said copy protection signal into the video signal by arraying a multiple of pseudo-sync pulses in the vertical blanking interval of the video signal, said pseudo-sync pulses having an amplitude substantially equal to the amplitude of the video signal sync pulses, and arraying a multiple of automatic gain control (AGC) pulses in the vertical blanking interval of the video signal;
- and
- performing a pre-set conversion operation on said digital data and/or an analog signal generated from said digital data, based on said copy management information;
- wherein said pre-set conversion operation for said analog signal includes a color burst inverting operation in which the phase of a front part of a color burst signal in said analog signal is inverted.
5 more elements
A method for reproducing a video signal of the type having a vertical blanking interval, comprising the steps of:
- receiving a video signal with appended copy management information at a reproducing device via a satellite communication link;
- said copy management information including an indicator of whether copying of only digital data is inhibited or copying of both digital data and analog signals is inhibited;
- detecting said copy management information that has been appended to the video signal in the form of a multiple of trigger bits;
- providing copy protection in the video signal by arraying a multiple of pseudo-sync pulses and a multiple of automatic gain control (AGC) pulses in the vertical blanking interval of the video signal when said trigger bits indicate that copying should be inhibited;
- and
- performing a pre-set conversion operation on said digital data and/or an analog signal generated from said digital data, based on said copy management information;
- wherein said pre-set conversion operation for said analog signal includes a color burst inverting operation in which the phase of a front part of a color burst signal in said analog signal is inverted.
4 more elements
An apparatus for reproducing a video signal, comprising:
- means for receiving a video signal with appended copy management information at a reproducing device via a satellite communication link;
- said copy management information including an indicator of whether copying of only digital data is inhibited or copying of both digital data and analog signals is inhibited;
- means for detecting said copy management information that has been appended to the video signal;
- means for providing a copy permission indicator in the received video signal by generating a protect code signal based on said copy management information, said protect code signal having plural coded bits and being operable to indicate a generation limitation on copying of the video signal, and arraying said protect code signal at a pre-set position in the video signal;
- and
- means for performing a pre-set conversion operation on said digital data and/or an analog signal generated from said digital data, based on said copy management information;
- wherein said pre-set conversion operation for said analog signal includes a color burst inverting operation in which the phase of a front part of a color burst signal in said analog signal is inverted.
4 more elements
An apparatus for reproducing a video signal of the type having a vertical blanking interval and sync pulses, comprising:
- means for receiving a video signal with appended copy management information at a reproducing device via a satellite communication link;
- said copy management information including an indicator of whether copying of only digital data is inhibited or copying of both digital data and analog signals is inhibited;
- means for detecting said copy management information that has been appended to the video signal;
- means for generating a copy protection signal based on said copy management information;
- means for inserting said copy protection signal into the video signal by arraying a multiple of pseudo-sync pulses in the vertical blanking interval of the video signal, said pseudo-sync pulses having an amplitude substantially equal to the amplitude of the video signal sync pulses, and arraying a multiple of automatic gain control (AGC) pulses in the vertical blanking interval of the video signal;
- and
- means for performing a pre-set conversion operation on said digital data and/or an analog signal generated from said digital data, based on said copy management information;
- wherein said pre-set conversion operation for said analog signal includes a color burst inverting operation in which the phase of a front part of a color burst signal in said analog signal is inverted.
5 more elements
An apparatus for reproducing a video signal of the type having a vertical blanking interval, comprising:
- means for receiving a video signal with appended copy management information at a reproducing device via a satellite communication link;
- said copy management information including an indicator of whether copying of only digital data is inhibited or copying of both digital data and analog signals is inhibited;
- means for detecting said copy management information that has been appended to the video signal in the form of a multiple of trigger bits in the video signal;
- means for arraying a multiple of pseudo-sync pulses and a multiple of automatic gain control pulses in the video signal when said trigger bits indicate that copying should be inhibited;
- and
- means for performing a pre-set conversion operation on said digital data and/or an analog signal generated from said digital data, based on said copy management information;
- wherein said pre-set conversion operation for said analog signal includes a color burst inverting operation in which the phase of a front part of a color burst signal in said analog signal is inverted.
4 more elements
Dependencies are inferred from the claim text.