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Computer system and video reproduction output control method

A computer system and output technology, applied in the field of computer systems

Inactive Publication Date: 2004-08-04
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is a copy protection method for TV monitors, not for computer monitor monitors

Method used

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  • Computer system and video reproduction output control method
  • Computer system and video reproduction output control method
  • Computer system and video reproduction output control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] figure 1 Shown is the structure of a portion related to video playback in the computer system according to Embodiment 1 of the present invention. This computer system has the decoder 11 that video data 10 is decoded, graphics driver 12, video memory 13, the graphics controller 14 that is started by graphics driver 12, is used for the monitoring display 15 of computer by graphics controller 14 control of the video reproduction output.

[0074] The video data 10 is data compressed by, for example, MPEG2, and is reproduced as an encoded stream from a DVD through a DVD drive under the control of an application program for video reproduction. A copy protection signal as digital watermark information is embedded in the video data 10 . The reproduced video data 10 is decoded by a decoder 11 . The decoder 11 is, for example, an MPEG2 decoder, and is realized by software or hardware such as an animation reproduction application program. The function of authentication (referr...

Embodiment 2

[0095] Figure 4 Shown is the structure of a portion related to video playback in the computer system according to Embodiment 2 of the present invention. if combined with figure 1 The same parts are assigned the same symbols for description, and in this embodiment, the graphics controller 14 also has an area separation function 14C. With this area division function 14C, when performing video playback on the monitor display 15, the graphics controller 14 divides the reproduced screen of the monitor display 15 into a plurality of areas, and uses the video data corresponding to each divided area for each divided area. The digital watermark information detected on the data 10 performs copy protection authentication as to whether the video data 10 is copy protected or not.

[0096] When the graphic controller 14 is embedded with electronic watermark information in the decoded data decoded by the decoder 11, the graphic controller 14 performs authentication (authentication 1) on w...

Embodiment 3

[0111] Figure 8 Shown is the structure of a portion related to video playback in the computer system according to Embodiment 2 of the present invention. if combined with figure 1 The same parts are assigned the same symbols for description, and in this embodiment, the graphics controller 14 also has a window function 14D. Through this window function 14D, when the monitor display 15 is used for video reproduction, the graphics controller 14 performs window recognition on the reproduction screen of the monitor display 15, and uses the video data 1 detected from the video data 1 corresponding to each recognized window for each recognized window. Copy protection authentication is performed on whether the received digital watermark information is copy-protected data.

[0112] When the graphic controller 14 is embedded with digital watermark information in the decoded data decoded by the decoder 11, the graphic controller 14 performs authentication (authentication 1) on whether ...

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PUM

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Abstract

A decorder (11) decodes video data (10) to output decorded data and performs a decorder authentication whether or not the video data (10) is a piece of data reproduced by a normal reproducing route. A graphic controller (14) performs copy protect authentication whether or not the video data (10) is copy protected using a digital watermark information detected in video data. When both of the decorder authentication and the copy protection authentication work out, the decorded data are output on the monitor display (15) through a video memory (13) after copy protecting. When the decorder authentication fails and the copy protection authentication works out, output of the decorded data on the monitor display (15) is prohibited. To provide a computer system which outputs copy protected video data on a monitor display by copy protecting without fail.

Description

technical field [0001] The present invention relates to a computer system having the function of reproducing and outputting video data recorded in media such as DVDs through a monitor display, and in particular to a computer system capable of preventing illegal copying of video programs requiring copyright protection, and video reproduction in the computer system Output control method. Background technique [0002] In recent years, with the development of computer and multimedia technologies, so-called personal computers compatible with multimedia have been widely put into practical use. Such a personal computer is provided with a function for reproducing video data (moving image data) recorded in multimedia such as DVD (Digital Versatile Disc), in addition to reproduction of text data or graphic data. [0003] Video data recorded in DVD is encoded by MPEG2 (Moving Picture Experts Group Phase 2). When reproducing such MPEG2 video data on a personal computer, under the cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16
CPCH04N7/163H04N21/4405H04N21/4408H04N21/4143H04N21/8358H04N21/4627
Inventor 小暮央山影朋夫竹岛秀则增仓孝一加藤拓石原淳浅野涉
Owner KK TOSHIBA
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