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6.1 Macrovision
6.1.1 Description and specifications
■
What is “Macrovision”?
Macrovision is a copy prevention system developed by Macrovision Corporation.
Widely used by video sources such as VHS and DVD-Video on the market and by satellite broadcasts, the system ensures
that, by causing the automatic gain control (AGC) of the video decks to malfunction, users will not be able to record properly
the video output sources protected by the system.
The AGC circuit is designed to adjust the gain of the input signals automatically and maintain the appropriate sensitivity,
and almost all consumer-use VCRs now feature it. It serves to make dark images a little brighter and excessively light
images darker and keep them this way.
While keeping the luminance and chrominance signal components of the video signals unchanged, Macrovision’s copy
prevention signals cause the AGC to malfunction by mixing signals with non-standard levels in the vertical blanking interval.
This is why the brightness of the images will fluctuate even when the images are recorded. These signals also have the
effect of causing trouble for the sync signals and disturbances in the images.
The disturbances caused ensure that content is unwatchable even when it has been copied.
■
What does the “color stripe” function do?
This function is part of the Macrovision standard, and it provides color stripes to overlap with the regular Macrovision signals.
It constitutes a method of superimposing the modulated color burst signal onto the video signals, and it is also referred to
as a means of color burst copy prevention.
The color stripe function inserts thin horizontal lines into the copied images and, like the Macrovision system, it makes the
images unwatchable.
* The color stripes are provided only in the Type 2 and 3 modes of the NTSC-M and J systems.
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Macrovision specifications
Macrovision supports the TV signals of the following systems.
Its signals are superimposed onto the composite signals and Y/C signals.
・
NTSC-M
、
NTSC-J
、
NTSC-443
・
PAL
、
PAL-M
、
PAL-Nc
・
Macrovision is optional. Contact your dealer or the Astrodesign Sales
Department.
・ Macrovision signals have different effects depending on the type of VHS or
DVD player used.
When using the system, be sure to check the terms and
conditions of the agreement with Macrovision Corporation.
CAU
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Summary of Contents for VG-884
Page 1: ...Portable Video Signal Generator VG 884 Instruction Manual Ver 1 00 ...
Page 2: ......
Page 3: ...Portable Video Signal Generator VG 884 Instruction Manual 2012 7 Ver 1 00 ASTRODESIGN Inc ...
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Page 58: ...42 ...
Page 93: ...Chapter 4 Selecting and Editing Pattern Data 77 ...
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Page 99: ...Chapter 4 Selecting and Editing Pattern Data 83 12BIT 0 4095 ...
Page 108: ...92 0 1 2 3 4 5 6 ...
Page 147: ...Chapter 5 Output Settings 131 MENU Display returns to the initial screen ...
Page 161: ...Chapter 5 Output Settings 145 3 4Kx2K 24Hz SMPTE ...
Page 164: ...148 9 16 9 4 3 center ...
Page 166: ...150 3 AdobeYCC601 4 AdobeRGB ...
Page 170: ...154 6 176 4kHz 7 192kHz ...
Page 177: ...Chapter 5 Output Settings 161 2 12bit ...
Page 183: ...Chapter 5 Output Settings 167 1 Advance Cipher Enhanced Link Verification is not supported ...
Page 206: ...190 9 16 9 4 3 center ...
Page 208: ...192 3 AdobeYCC601 4 AdobeRGB ...
Page 211: ...Chapter 5 Output Settings 195 7 192kHz ...
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Page 246: ...230 Teletext waveforms ...
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Page 290: ...274 Select EXECUTE using or INC DEC and then press SET to erase the user characters ...
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Page 351: ...Carter10 Internal data 335 ...
Page 354: ...338 F0H letters me 1 F1H letters me 2 VESA specifications ...
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Page 356: ...340 F2H Chinese character AI F3H Chinese character BI ...
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Page 358: ...342 F4H Chinese character TAKA F5H Chinese character KIRI ...
Page 359: ...Carter10 Internal data 343 ...
Page 360: ...344 F6H Chinese character KEN F7H Burst ...
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Page 362: ...346 10 4 Character pattern data 5 7 character pattern table 1 of 2 ...
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Page 379: ...Chapter10 Internal data 363 Table of TV standard signal timing waveforms 1 of 3 ...
Page 380: ...364 Table of TV standard signal timing waveforms 2 of 3 ...
Page 381: ...Chapter10 Internal data 365 Table of TV standard signal timing waveforms 3 of 3 ...
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