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Hdmi licensing, llc releases hdmi specification version 1.4a

Lee Stewart
03-10-2010, 03:05 PM

Latest Version Specifies Mandatory 3D Formats For Broadcast Content

SUNNYVALE, Calif., March 4, 2010 HDMI Licensing, LLC today announced the release of the HDMI Specification Version 1.4a, featuring key enhancements for 3D applications including the addition of mandatory 3D formats for broadcast content as well as the addition of the 3D format referred to as Top-and-Bottom. The complete HDMI Specification Version 1.4a, along with the Compliance Test Specification (CTS) Version 1.4a, is available to HDMI Adopters on the HDMI Adopter Extranet.

In addition, an extraction of the 3D portion of the HDMI Specification Version 1.4a is available for public download at http://www.hdmi.org (http://cts.vresp.com/c/?HDMILicensingLLC/e9b1cd33f0/1b3f5790f6/7e02c670c0). The purpose of the extraction document is to provide public access to the 3D portion of the HDMI Specification for companies and organizations that are not HDMI Adopters but require access to this portion of the Specification.

The latest HDMI Specification adds key enhancements to support the market requirements for bringing broadcast 3D content into the home:

The addition of Top-and-Bottom to the Specification.
The addition of two mandatory formats for broadcast content:

Side-by-Side Horizontal

With the addition of these two mandatory formats, the HDMI Specification Version 1.4a provides a level of interoperability for devices designed to deliver 3D content over the HDMI connection. The mandatory 3D formats are:

Mandatory 3D Formats

For movie content:

Frame Packing

1080p @ 23.98/24Hz

For game content:

Frame Packing

720p @ 50 or 59.94/60Hz

For broadcast content:

Side-by-Side Horizontal

1080i @ 50 or 59.94/60Hz


720p @ 50 or 59.94/60Hz
1080p @ 23.97/24Hz

Implementing the mandatory formats of the HDMI Specification facilitates interoperability among devices, allowing devices to speak a common 3D language when transmitting and receiving 3D content. The mandatory requirements for devices implementing 3D formats are:

Displays must support all mandatory formats.
Sources must support at least one mandatory format.
Repeaters - must be able to pass through all mandatory formats.

HDMI Adopters will have 90 days from the publication of the HDM Specification Version 1.4a to build and sell products that are compliant with the HDMI Specification Version 1.4a as well as pass the CTS Version 1.4a. This also applies to legacy set-top boxes that may have upgraded to use Specification Version 1.4 signaling.

For more information about the HDMI specification please visit http://www.hdmi.org (http://cts.vresp.com/c/?HDMILicensingLLC/e9b1cd33f0/1b3f5790f6/26dc06bfee).

Lee Stewart
03-10-2010, 03:07 PM
Frame packing looks like this :


There is a "master frame" that is 2205 x1920. Within that master frame are two 1920x1080 frames - one L and the other R. They are seperated from each other by 45 pixels of vertical active blanking which helps the electronics seperate the two frames.

When they say a 3D BD player will output frames at 24 FPS - that is 24 "master frames"/packed frames per second. It is up to the display to unpack them and show them in the Frame Sequential 3D format:


Additional info on the different 3D formats - you can see how each format gives something up with the exception of the Frame Sequential 3D format which is the only Full HD per eye 3D format: