Dear Contributors,
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I guess it depends on what you are willing to accept as HD
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"HD Ready" certification for TVs only came into use in 2004. So, any TV that was purchased after that date will likely be 1080p. Although, technically, anything shot or displayed in 720p (or above) is considered "HD" by the audio-visual industry.
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...enlargement from 520p to 720p from .avi files...
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AVI format does allow all kinds of video enhancements, but taking the route of enlarging every single pixel via software means utilizes vast amounts of processing power. Even with one of the latest i7 cpus from Intel, to re-encode a clip from 520 to 720p will have your computer grinding through cycles most of the night!
A better route is to find a 720p AVI source (or reformat into AVI with a software tool) then optimize the gamma levels, color saturation, frame fragmentation and header information. The results can be impressive when viewed on a modern 1080p tv.
Just for fun, I took a look at Christy Canyon's studios (since that was Babycat's question) to ascertain if her content has been released in true 720p DVD format.
Here's my findings:
According to IAFD, Christy worked in the porn industry between 1984-2011. She was also prolific, featuring in over 200 titles and working for a diverse number of studios.
In theory, this sits her squarely in the DVD era, so all her content should be "DVD quality" (at least 720p, or 0.9 megapixels)
In acutality... Just a brief review of her VEF forum thread indicates almost all of her videos have been reformatted into something nearing HD quality: 640, 700, 480...
So, the only way to ensure Babycat got his HD content of Christy, would be access to the original DVDs (that were then carefully encoded at a resolution of 1280 x 720 in a stable format (like mp4), then uploaded to one of the better forum sites (like our very own VEF).
Unless there's a generous soul who collected all her original DVDs, then had the tech know-how to encode them correctly, Christy fans could have a long wait to enjoy her in true HD.
Kind Regards, NB