Consumer Electronic Control (CEC) features and command sets and CEC compliance tests are now fully specified.
Creation of version 1.2a of the HDMI Compliance Test Specification (CTS), which includes a CEC Supplement. HDMI CTS 1.2a has been updated for technical consistency with HDMI Specification 1.2a as well as to the recently released HDMI Specification 1.2. o Significantly, CTS 1.2a contains additional cable and connector testing and Authorized Testing Center (ATC) submission requirements. Specifically, under CTS 1.2a, the Adopter shall submit for testing to the ATC any new HDMI cable whose length exceeds previously tested cables.
Additionally, HDMI Licensing, LLC will maintain a list of approved connectors. For a device to pass CTS 1.2a testing at an ATC, all connectors on such device must appear on the approved connector list. To add a connector to this list, the vendor must submit to the ATC or HDMI Licensing, LLC full and passing testing results.
Originally Posted by HDMI_Org /forum/post/0
I recommend that you do not focus on the HDMI version number, but rather on the specific features you are looking for. Many of the features in HDMI are options, but support for a particular HDMI version number does not mean that the latest features enabled by that version are incorporated into the product itself.
That said, here is a brief summary of the revision changes:
From HDMI 1.1 to HDMI 1.2, the major things added were:
- Support for SACD ("One Bit") audio format
- Enabled easier implementation of HDMI in PCs by 1) eliminating restrictions on the connector and RGB color space, and 2) requires displays to support future low-voltage (ex. AC-coupled) sources
From HDMI 1.2 to HDMI 1.2a, the major things added were:
- CEC protocol and testing was fully specified
- Improved cable and connector testing and verification procedures defined
- Established a certified connector list
A final note: all versions of HDMI are fully backwards compatible. This is again a reason why one should not focus on the version number when evaluate a product.