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Technology Stocks : Cable, iptv, cellphone and satellite ?
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From: Arthur Tang7/3/2007 10:06:58 PM
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Data compression conversion is done in two steps.

First the ability to decompress the older compressed data. This means the digital data is converted back to RGB pixels. The pixel data must be stored and synchronized to be encoded one frame at a time.

This cached pixel data is then encoded into Mpeg4/h.264 standards. Typically done in a digital camera with zoom feature. So, encoders in digital camera has been perfected for sometime. It is a matter of speed if your data stream in the train of live broadcast is not Mpeg4/h.264 already. This is the problem if movies are in Mpeg1 and has to be converted. Or broadcasting is done in Mpeg2.

Mpeg4/h.264 is perfect, if the source is already stored in the same compression scheme. 100 years from now the server farms will still have business to retransmit data in different formats?

So, broadcasting cameras had to use the correct encoder for Mpeg4/h.264. Some studios like CBS, NBC and ABC are still using Mpeg2 cameras. The quality shows on your analog TV compared to Fox cameras. Mpeg4 cameras can do more resolution and colors in a shorter time spent to store the data.

Movies of 35 mm film, has to be encoded by optical conversion to digital pixels, then compressed either to Mpeg1 or Mpeg4/h.264. It should be stored perfectly in Mpeg4/h.264 before transmission to destination. It takes too long a time to convert on the fly to another data compression scheme.

If ARRS does media virtual server farm, then customers can send in Mpeg1 data or Mpeg2 data and get stored Mpeg4/h.264 data for rebroadcast in the correct encoder.
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