I am surprised to hear the Ambarella chip is good enough for broadcast applications. And at 1W, its a bit high power for a portable device.
Ron Economos wrote:
This is one of the big reasons broadcasters are choosing H.264 over VC-1. With the abundant toolset of H.264, there are many opportunitys for improvements and consequently, a long lifespan (the expectation is at least 10 years, which is about how long MPEG-2 has been around). Second generation H.264 real-time encoders are just starting to ship. Almost all of these are based on the Ambarella single chip device, replacing big multi-chip encoders like the Tandberg DSP based encoder with 19 TI DSPs and 9 big Xilinx FPGAs. There's a picture of the Tandberg board at the end of this presentation:http://www.smpte.org/sections_chapters/toronto/media/SMPTE%20HD%20Boot%20Camp%20-%20HD%20Compression%20v2.pdfBoth Tandberg and Harmonic are claiming that the Ambarella based 2nd generation encoders are at least 20 percent more efficient than the 1st gen DSP based encoders. But the Ambarella chip was originally targeted at low power portable applications (video cameras), and has some design trade-offs to achieve it's 1 watt power dissipation. No doubt that Ambarella (and others) are working on something better yet. And the beat goes on.... Ron Albert Manfredi wrote:And H.264 systems will also have to deal with their own legacy problem, no doubt, in a few years.---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways:- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.
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