No, it doesn't say in this announcement...
On the official MHDL homepage (
http://www.mhlconsortium.org) you can read about what the standard supports (not the same as saying that Roku's hardware/software will support this though... but on the other hand, I think adopters have to support the full standard...!)
http://www.mhlconsortium.org/about/FAQs.aspx
(4. What are the main features of this and how is it optimized for mobile phone and portable devices?)
Products implementing the MHL specification will feature:
HD Video and Digital Audio
Consumers will be able to experience HD video content with up to 1080p/60 picture quality, and digital audio up to 192 kHz and capable of delivering 7.1 channel surround sound from their mobile device.
Utilization of Existing Connectors
The MHL specification gives manufacturers the flexibility to utilize widely established connectors available in today’s mobile and CE products.
Low Pin-Count Interface
HD video and digital audio are enabled with only a 5-pin interface while at the same time providing control and power, which along with utilizing existing connectors allow mobile devices to maintain their small form factor and keep implementation costs low.
Provision of Power to the Mobile Device
The MHL specification enables operation of the mobile device in MHL mode while 5 volts and 500 mA of power are simultaneously provided from an HDTV or other CE device. For example, a mobile phone can play back a full-length movie on an HDTV without draining power, so the mobile phone can continue to be used for other purposes, such as calls and emails.
Content Protection
The MHL specification fully supports High-bandwidth Digital Content Protection (HDCP) technologies for the safeguarding of high-value digital motion pictures, television programs and audio against unauthorized interception and copying.
So even-though the site lacks information about bitrate (should be 24bit to my knowledge) - my best guess is that the Roku Stick will also support DTS-HD/TrueHD
More info:
http://en.wikipedia.org/wiki/Mobile_High...ition_Link
Would be nice to get hands on the MHL 1.0 specification (need adopter signup and payment...).
It would perhaps give the possibility to start implementation/configuration of the RC keymaps.xml already...
XBMC could even become the preferred option for some manufacturers (easy customisation of skin and add-ons) - maybe that is a "little" far-fetched... but who knows
~maymann