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Re: Buzzoff post# 5398

Thursday, 12/08/2011 11:40:53 AM

Thursday, December 08, 2011 11:40:53 AM

Post# of 28022
Buzzoff, you claim to "know something" about compression technology in a previous post. I searched for "h264 compression ratio" on Google and one of the first results to come up was the following link:

http://www.kanecomputing.co.uk/pdfs/compression_ratio_rules_of_thumb.pdf

The point of my search was to get a rough idea for the compression ratios achievable for high-quality video using the h264 AVC standard. x264, an open-source product, is one implementation of the h264 AVC standard, and according to several technical people who investigated Raystream on YCombinator, Raystream is just using X264 as their supposed "product", which is ridiculous. Do your DD.

Raystream claims 70% compression? That source I posted says H264 gives 50:1, which is 98% compression, for "maintaining excellent quality"!

On Wikipedia, "Whereas modern interframe video formats, such as MPEG1, MPEG2 and H.264/MPEG-4 AVC, achieve real-world compression-ratios of 1:50 or better..." again, something in the 95%+ range.

Even a researcher in the field, published in a *peer-reviewed* journal, see here:

http://spiedigitallibrary.org/jei/resource/1/jeime5/v14/i1/p013013_s1

In the article, "The compression ratios of H.264's I pictures can be more than 50:1 in luminance...."

So again, another source for a figure around 50:1 or above 95%. And your DD said you get 70% with Raystream? And this is for high quality video?

That means that encoding a video with H264 at a *lower* compression ratio, perhaps around 90% or 80%, will be *even better*. If you do more research, you can see how H264 has the highest signal dB per bit of storage versus previous algorithms.

It's state of the art, and there are implementations of it that are open-source.

Why would someone as smart as Google or Microsoft pay a company to get 70% compression when there are *free products* that are vetted as state-of-the-art that achieve *higher compression* for *high quality HD video*?

I smell BS on your supposed "DD". Simple Google searches revealed credible sources, one being a *peer-reviewed researcher*, saying the compression ratios are much higher than what Raystream is claiming.

Go do a Google search for Vega Star Capital and their indictment by the SEC for stock price manipulation, too. This company stinks!

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