Is the following correct about Automatic Gain Control (AGC)?
- Automatic gain control (AGC) was a feature added to VCRs.
- The goal was to adjust the brightness of the video image to keep it as close to the middle as possible (similar to how some televisions have a feature to reduce the sound automatically if there is a very loud scene).
- The anti-copying feature of Macrovision soon followed in VCRs through an ingenious/devious use of the AGC feature, by fooling the recording VCR to auto adjust the video image to be too bright or door dark, thus ruining the copy.
- Many (all?) external frame TBCs have the ability to ignore Macrovision's ingenious/devious use of the AGC feature.
- Some analog-to-digital capture devices have the AGC feature, but many older capture devices from ATI and others do not.
Question: Is the AGC feature in many modern capture devices meant to improve video capture by adjusting brightness on the fly? Or is AGC forced into capture devices to comply to anti-piracy rules?
Question: Is AGC a good thing for capture hobbyists or a bad thing?
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