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Amimon brings WHDI to notebook PCs

Posted: 20 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:Wi-Fi? HDTV? WHDI technology? interface?

Video modem approach
Amimon's video modem technology is based on the principle of Joint Source Channel Coding (JSCC). JSCC prioritizes video components according to their importance. It also uses unequal error protection (UEP) to encode most significant bits of the important components better than least significant bits of the less important. It then combines modulation and UEP to generate the proper constellation in the channel signal.

Amimon has always insisted its video modem approach overcomes the challenges of wireless video delivery, where the video transfer must take place in real time with no delay and no loss in high fidelity over wireless channels that tend toward instability. Amimon-proposed WHDI also uses a multi-input-multi-output (MIMO) 20MHz/40MHz bandwidth channel over the 5GHz band, where MIMO provides extra bandwidth and a diversity boost.

The company's new business strategy is to move this JSCC-based video modem approach forward, promoting its advantage in radio-independence.

Sony switch
Regardless of the technological merit of its video modem approach, things have gotten even tougher lately for Amimon, with Sony's switch from Amimon-led WHDI to a competing 60GHz wireless technology called Wireless HD.

Last year, Sony used Amimon's 5GHz wireless chips in its Bravia ZX-1 TV. But when Sony found out that Amimon wasn't ready with a 1080p HD version of WHDI, the Japan company designed Amimon out of this fall's new LCD TV.

The move will officially make Sony the third consumer electronics giant, after Panasonic and LG Electronics, to embrace 60GHz wireless HD. The interface is used to transmit and receive audio and video signals between a TV and a tuner boxplaced close to each other. All three use chips developed by SiBeam, although Sony is not officially disclosing the chip vendor.

Geri called Sony's latest move "an unfortunate design loss for us." But Geri said, "It's my strong believe that OEMs will need WHDI to enable the multi-room high-definition video delivery."

Geri pointed out that Sony's new LCD TV, for example, comes with a little fine print. For example, the display and tuner need to be placed at least 50 cm apart but no farther than 10 meters, and the tuner should not be placed on a metal rack.

Amimon remains optimistic. Geri claims that it has done all the necessary homework to enable multi-room HDTV home networking. Together with Hitachi, LG, Sharp, Sony, Samsung and Motorola, Amimon defined all necessary specs for copy protection (using HTCP), video display resolution and control layers. "We have a 500-page WHDI document to prove it," Geri said.

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