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Method and apparatus for conveying rights across an analog video interface

A technology of analog video and digital video, applied in the field of video

Inactive Publication Date: 2006-12-27
ROVI SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, further copy prevention problems arise when, for example, analog video is subsequently recorded (stored) in digital form

Method used

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  • Method and apparatus for conveying rights across an analog video interface
  • Method and apparatus for conveying rights across an analog video interface
  • Method and apparatus for conveying rights across an analog video interface

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Embodiment Construction

[0022] figure 1 The status of the analog protection system (APS) using the AGC and CS processes disclosed herein is described in the form of a table ("APS" is a general term used in the video field). In this case, four APS states numbered 0 to 3 are described in the left hand column. Each state corresponds to the presence / absence of the above-described pseudo synchronization (AGC) and color stripe (CS) modifications to the characteristics of the analog video signal (the BPP modification is not used in this example). It can be seen from the state 0 that both AGC and CS are "off", that is, they do not exist. Therefore, this state is a standard video signal of the NTSC or PAL type without modification. In this case, as with traditional video, unlimited storage (copy) in PVR is permitted. Corresponding to the state 1 when AGC is on and CS is off, it is an instruction to set the amount of storage time (duration) that the PVR can store video. This state will be further described below....

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Abstract

Method and apparatus for controlling subsequent permitted use, such as storage, of video on a digital storage device such as a personal video recorder (PVR). An analog video signal is provided with at least one modification to its video characteristics, for instance in the horizontal blanking interval and vertical blanking intervals, which is of the type having the capacity to inhibit making an acceptable analog video recording of the analog video signal. Examples of these modifications are the well known pseudo-sync (automatic gain control), color stripe (color burst modifications), and added back porch pulses. The pattern of presence or absence or nature of the modifications also serves as a code to carry information as to the subsequent permitted use in the digital realm, such as whether the accompanying content of the video signal is allowed to be digitally recorded in digital form in a compatible PVR personal video recorder, and if it is allowed to be recorded, the length of time that the recording is allowed to persist, for instance one day, one week, one month. Hence the modifications to the analog video signal have a dual use in both inhibiting recording in the analog realm and carrying information across the analog video interface so as to control storage (copying) or other use of the video in the digital realm.

Description

Technical field [0001] The disclosed content relates to a video, and more specifically, to a control over the use of video content. Background technique [0002] The technical issues of video usage control, such as video copy prohibition and copy control, are already familiar to people. There are some technologies that prevent or prevent unauthorized copying of movies or TV programs or other video materials that usually have copyrights. Ryan’s U.S. Patent 4,631,603 discloses an example of copy prohibition, in which the analog video signal is modified so that the television receiver will still provide a normal color picture from the modified video signal, and when the modified video signal is played back Videotape recordings usually produce unacceptable television pictures. This "AGC" method relies on the fact that a specific video cassette recorder (VCR) automatic gain control system cannot distinguish between the normal "sync" pulse of the traditional video signal and the added ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/913H04N5/781H04N9/804
CPCH04N2005/91364H04N2005/91371H04N5/781H04N2005/91328H04N2005/91314H04N5/913H04N9/8042H04N5/76H04N7/167
Inventor 马克·A·霍拉
Owner ROVI SOLUTIONS CORP
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