Image signal transmitting method, superimposed signal extracting method, image signal output and receiving apparatus, and image signal recording medium

An image signal and receiving device technology, which is applied in the direction of simultaneous/sequential multi-television signal transmission, image communication, selective content distribution, etc., and can solve the problem of inability to perform prevention control signal duplication prevention control, etc.

An image signal and receiving device technology, which is applied in the direction of simultaneous/sequential multi-television signal transmission, image communication, selective content distribution, etc., and can solve the problem of inability to perform prevention control signal duplication prevention control, etc.

CN1187975CInactive Publication Date: 2005-02-02SONY CORP
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  • Image signal transmitting method, superimposed signal extracting method, image signal output and receiving apparatus, and image signal recording medium
  • Image signal transmitting method, superimposed signal extracting method, image signal output and receiving apparatus, and image signal recording medium
  • Image signal transmitting method, superimposed signal extracting method, image signal output and receiving apparatus, and image signal recording medium

Examples

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Embodiment Construction

[0066] Embodiments of the image signal transmission method, the superimposed signal extraction method, the image signal output device, the image signal receiving device and the image recording device medium will be explained below with reference to the accompanying drawings.

[0067] In the following explanation, it is assumed that the image signal output device and the image signal recording device are used for a DVD (Digital Video Disc) recording and reproducing device (hereinafter referred to as a DVD device). Also, explanations about the speech signal system will be omitted.

[0068] figure 2 is a schematic diagram for explaining the image signal output device 10 used in the image signal duplication control system of the first embodiment of the present invention. That is, the output device 10 corresponds to the reproduction system of the DVD device of the first embodiment.

[0069] exist figure 2 In this case, the recording medium 100 is a DVD, and in this example, di...

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Abstract

The PN code generation controlling means 15 produces a PN code generation clock signal PNCLK to generate the PN code of one chip to one vertical section and supplies this clock signal to an SS duplication preventing control signal generating means 16. The SS duplication preventing control signal generating means 16 generates the PN code of one chip to one vertical section depending on the PN code generation clock signal PNCLK and executes the spectrum spread to the duplication preventing control signal S3 using this PN code to form the SS duplication preventing control signal S5. The SS duplication preventing control signal S5 is superimposed to the image signal and is then output. Thereby, elimination and deterioration of the additional information which has been spectrum spread and is then superimposed into the image signal can be prevented to surely provide the additional information superimposed to the image signal.

Description

technical field [0001] The present invention relates to a method and device for reversely duplicating information according to extracted additional information, by outputting an image signal superimposed with additional information and then receiving the image signal to extract the superimposed additional information, the present invention also relates to a An image signal recording medium, for example, is a case where an image signal recorded on the recording medium is reproduced and then transmitted together with an anti-duplication signal, and the transmitted image signal is received to restrict or prohibit or other recording media. Background technique [0002] VTRs (Video Tape Recorders) have been widely used in daily life, and various software capable of playback on the VTRs are widely provided. Digital VTR or DVD (Digital Video Disc) playback devices are also now available, providing extremely high picture and sound quality. [0003] On the other hand, however, the ...

Claims

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Application Information

Patent Timeline
02 Feb 2005
Publication
CN1187975C
IPC
H04N21/2347; H04N5/913; H04N7/08; H04N21/4405
CPC
H04N5/913; H04N2005/91371; H04N2005/91328; H04N2005/91314; H04N7/08; H04N2005/91321; H04N21/2347; H04N21/4405
Inventors
荻野晃; 池田望