[fernalfer]

Whats the difference between HDMI 1.1 and HDMI 1.2?


I'm deciding between the yamaha 1700 and 2600 or the Pioneer elite 82 or 84


Now the 2600 id HDMI 1.1 and the rest are 1.2.


What is the benefit of having 1.2 over 1.1 or is there any?

 

[fernalfer]

I hope someone can at least clarify.

 

[MichaelJHuman]

Odds are VERY good that you don't care about HDMI 1.2 or 1.2a. It does support DSD(Super Audio CD) bitstream, but as of today this is not very useful even if you have an SACD player with HDMI because of the lack of receivers/processors which decode DSD.


The following is a quote from hdmi.org about 1.2a which adds more rigorous controls:

Quote:
HDMI 1.2a

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.

 

[HDMI_Org]

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.

 

[kelpie]



Quote:
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.

I certainly see your point about focusing on feature availability, but I haven't often (ever?) seen manufacturers mention that they included improved cable and connector testing and verification and used certified connectors in their HDMI 1.2a products. Since interoperability between HMDI products seems to have been a common complaint made by consumers, wouldn't one think that this would be important features to make known- say by making the HDMI version number available to consumers when they ask? Either the mandatory testing/verification/certification included in the HDMI 1.2a standard is relevant or it isn't. Again I certainly see your point about features, but don't really understand why manufacturers are so tight lipped about their products' HDMI version number. You're not saying that the connector testing/verification/certification in the HDMI 1.2a standard is optional for manufacturers, are you?

 

[HDMI_Org]

Correct- we made it a mandatory requirement that manufacturers adhere to the new specification defining the improved cable and connector testing and verification procedures- this is not an option. We allow for a short but reasonable amount of time for manufacturers to comply to minor new specification requirements after the new revision of the spec is released.