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Analogix ignites MYDP vs. MHL battle

Posted: 08 Sep 2011 ?? ?Print Version ?Bookmark and Share

Keywords:MYDP? mobility interface? interconnect? MHL?

Industry watchers would agree that when it comes to HDTV interface, the clear winner would be HDMI, which was originally developed by Silicon Image Inc.

But in the mobile world, no such consensus applies. The mobile industry hasn't indicated its interface preference for streaming HD video from a smartphone or a tablet to an external large-screen TV.

Analogix Semiconductor Inc. is hoping to tip this uncertain balance and has joined STMicroelectronics' efforts to push Mobility DisplayPort (MYDP). Analogix is known to focus primarily on DisplayPort-based interconnect technologies.

In this report
?? MYDP is 'a rogue' interface
??MHL and HDMI are not the same thing
??Do mobile apps processors support DisplayPort?
??What about MIPI-DSI for mobile devices?

MYDP is a mobile digital interface designed to reduce the number of communication signal pins for the mobile market. Earlier this year, ST, billing it as a companion to the DisplayPort standard, submitted an MYDP proposal to the Video Electronics Standards Association (VESA).

ST and ST-Ericsson are now both behind MYDP.

Carlo Bozotti, ST's CEO, expressed in May ST's commitment to extend the adoption of DisplayPort beyond monitors to mobile devices. Bozotti then said: "DisplayPort can contribute a lot to our top-line evolution."

Although VESA's comment period hasn't started for MYDP, Analogix is jumping the gun and has announced that its own SlimPort family of transmitter and receiver chips, which use the same underlying technology as DisplayPort, is compatible with the ST-promoted MYDP digital interface.

Consider this move an opening salvo in the MYDP vs. Mobile High-Definition Link (MHL) battle.

As Jon Peddie, president of Jon Peddie Research, explained, the MYDP interface doesn't specify the connector type. "That makes it up to the device makers to decide whatever connector they want to use." MYDP features a MUX that allows the DisplayPort signal to share signaling with USB, allowing the standard Micro USB port to be used for both DisplayPort and USB connectivity, he added.

Both Analogix and ST, armed with SlimPort and MYDP, intend to go head-to-head against Silicon Image and MHL.

More than three years ago, Silicon Image and a consortium of companies developed MHL, a new mobile audio/video interface standard for connecting mobile phones and other portable devices to high-definition televisions (HDTVs) and displays.

MYDP is 'a rogue' interface
Industry observers and analysts are hedging their bets on MYDPfor nowover concerns that it's just a re-invention of the MHL wheel.

Randy Lawson, IHS iSuppli, principal analyst for display electronics and consumer market research, noted, "I do believe that MHL has much promise, despite a slow start (MHL was announced in 2008; but the first official standard was not released until last year and first products only coming out now from Samsung)." He described HDMI "the de-facto standard for HD display interface," because its ubiquitous status in HDTVs, and on-going growth of HDMI transmission ports into the mobile space (like laptops). "That would seem to bolster a view that MHL has ample opportunity for future design-ins," he added.

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