HDMI Official Compliance Testing & Logo Certification Programs

GRL is an Authorized Test Center (ATC) by HDMI Forum that provides a range of HDMI test services, including HDMI 2.1 FRL, HDMI 2.1 TMDS, HDMI 1.4b, and HDCP 1.2 & 2.2 for sources, sinks, repeaters, and cables…


GRL is a member of the HDMI Forum and offers deep expertise and a range of Certification, Pre-Certification and debugging services.

HDMI 2.1 & 1.4b, HDCP 1.2 & 2.2 for Sources, Sinks, Repeaters, Cables, and Adapters:

  • Electrical Compliance and Protocol Compliance
  • Interoperability (not required for certification)
  • 4K2K, 3D, and other optional HDMI features


Please visit the GRL-Philips HDMI ATCs page for more information and ordering instructions.

HDMI® Test


HDMI® Test

High Definition Multimedia Interface, HDMI, integrates digital video and audio transmission and can transmit audio and video signals on one single cable simultaneously. HDMI can be used in TV boxes, stereos, personal computers, DVD players, and screens,  and is widely used. The latest HDMI technology is HDMI 2.1 FRL (Fixed Rate Link),  released by the HDMI Forum at the end of 2017, it subverts the previous signal transmission mode of the HDMI interface.



HDMI Licensing Administrator (HDMI LA) is the responsible unit for registered members. It regularly organizes various learning, promotion, and publicity activities related to HDMI technology and also is the agent appointed by the HDMI Forum to license Version 2.1 of the HDMI Specification and is the agent appointed by the HDMI Founders to license earlier HDMI Specifications. For more information, please refer to www.hdmi.org.


HDMI Forum

HDMI Forum is a non-profit organization that brings together world-class excellent manufacturers and is also an officially authorized organization of HDMI LA. The HDMI 2.x certification specification was also discussed and formulated by the HDMI Forum. Their main task is to develop future versions of HDMI specifications and technologies and create a complete and compatible HDMI ecosystem. For more information, please refer to www.hdmiforum.org.


HDMI Latest Specification

High-Definition Multimedia Interface Specification Version 2.1-November 13, 2017


Certification Area

HDMI can be certified by the below product types.


HDMI 2.1 FRL test


In response to the increasing demand for high-quality audio and video applications in the consumer market, the HDMI Forum released the latest HDMI 2.1 specifications at the end of 2017. The most amazing new feature is the addition of the FRL (Fixed Rate Link) transmission mode. It can be said It overturns the way the HDMI interface transmits signals in the past.


HDMI 2.1 Test Items Summary


* FRL Source, Sink, Connector, and Cat.3 HDMI Cable already can obtain HDMI 2.1 certification

<Click to Test Instrument Reference>



HDMI 2.0 now has been replaced by HDMI 2.1 completely.

HDMI 2.1 is divided into two modes, FRL and TMDS. For the FRL mode, DSC, HDR, and Gaming  Mode related test items and specifications are being released.




1. What data rate does HDMI 2.1 FRL supports?



2. Do products that support HDMI 2.1 FRL need to use HDMI 2.1 certified connectors?

The product needs to use HDMI Cat-3 connectors so that it is able to obtain HDMI 2.1 FRL certification.

HDMI Certification Process

HDMI Certification Process

atc test process

* This flow is only for HDMI 1.4 and 2.1 ATC tests, if you would like to get detail about HDMI Self-test, please contact us.


(1) Become an HDMI LA Member

You can go to the association website to check whether your Company Name is an association member, members can be OEM or Branding manufacturers, choose one.

If not, apply for the membership online,

  1. Application contact person signs Agreement
  2. payment completed
  3. Applicants will receive a set of IDs and passwords that means the application is successful


(2) Provide sample information. What is CDF & HDCP Form?

  • CDF (Capability Declaration Form):
    This form will record the capabilities of your product. The standard test is in progress, and it will be confirmed whether the content you filled in and the test result are consistent. This form is necessary for testing. You need to be a member of the association to download it.
  • HDCP Form:
    This form is optional. If your product supports HDCP1.x or HDCP2.x, you have to provide this document.
    HDCP Form can be downloaded at DCP Webpage.
  • Family Model list: When performing ATC certification, the main certification model is an extended model (Family Model), no additional testing is required. Please fill in the Family spreadsheet in the CDF and submit it to GRL before certification, and we will help you submit it to the Association for review.
    The Family Model should follow the below conditions:
    • The extended model has no hardware changes (except for the case design, and color change)
    • No software & firmware changes for extended models
    • The DisplayPort hardware design on the extended model remains unchanged

(3) HDMI 1.4 ATC: After getting the certificate provided by GRL

  • You need to apply for the HDMI Confirmation letter on the HDMI Association website
  • Log in to your member account and choose your product category: HDMI 1.4b/2.1 Source/Sink/Repeater/Cable/HDMI Premium Cable
  • The files that need to be uploaded: CDF, GRL test report, HDMI Certificate
  • After filling out all the information and upload to complete the HDMI certification process

HDMI Certification Test Items & Instruments Used


HDMI Certification Test Items

The product category can be certified by HDMI and test items.

* Although the names of the following major items (Electrical test) are the same, the actual test items will vary depending on the product category.




HDMI Certification Test Items

Electrical Test

  • Tektronix DPO72004C
  • Keysight M8195A

Protocol Test

  • Keysight U4998A
  • Keysight M8195A
  • QuantumData 980

Voltage Test

  • Keysight E3634A
  • Advnatest R6240A
  • HIOKI 3522-50


  • QuantumData 882
  • Yokogawa DLM2024

Impedance Test

  • Tektronix DSA8200
  • Keysight E5071C


  • Simplay Labs SL8800



HDMI®, HDMI® High-Definition Multimedia Interface, Ultra High-Speed HDMI® Cable Certification Test, and HDMI trademark

are registered trademarks of HDMI Licensing Administrator, Inc.
This information is provided for convenience only. This information is not and should not be regarded as official information of the HDMI Forum.

For the official information on HDMI®, please visit the website https://www.hdmi.org/, or obtain it directly from the HDMI Forum.


HDMI® 2.1 Cable Test


HDMI 2.1 Cable - Ultra High-Speed Cable

HDMI® 2.1 Specification makes the product reaches a higher fresh rate and up to 10K resolution, and its bandwidth is increased to 48Gbps. The transmission speed on all four lanes can reach 12Gbps. Compared with the HDMI® 2.1 TMDS specification (6Gbps on 3 channels), the bandwidth is doubled. In order to support the HDMI 2.1 FRL product for high bandwidth requirements, a new cable specification has also been introduced.
  • New HDMI® 2.1 Ultra High Speed (UHS) Cable can ensure that high dynamic range uncompressed 8K images that require high-bandwidth transmission can be played normally. And reduce electromagnetic interference to nearby devices.
  • HDMI® 2.1 Ultra High-Speed Cable is backward compatible with the lower version of the HDMI ® specification.


HDMI 2.1 Cable Test Items

  • 4.1 FRL Data Lane Parametric Electrical Test


  • eARC Data Lane Parametric Electrical Tests


  • DDC/CEC Line Tests


  • Note
    • HDMI 2.1 Cable needs to meet the requirements of HDMI 1.4b cable
    • The connectors used must be certified HDMI Category 3 Connectors



HDMI® 1.4 Cable Test



Premium HDMI® Cable Test 


Premium HDMI Cable 

The Premium HDMI® Cable Certification Program covers additional and enhanced cable tests to ensure cables comply with the full 18Gbps bandwidth and with an EMI test to ensure they minimize interference with wireless signals.

The program gives customers confidence when purchasing new HDMI® cables for 4K/UltraHD products that include 4K@60Hz, BT.2020, and HDR features and these newly designed cables are available with both HDMI Type-A and Type-D Connectors.


Premium HDMI Cable Test Items

  • General Cable Assembly Tests



  • Eye Diagram Test



  • Parametric Test



  • HEAC Cable Assembly Tests (Optional)


  • Additional Electrical Performance Tests


  • 600MHz Eye Diagram Test


  • EMI/RFI Test



HDMI®, HDMI® High-Definition Multimedia Interface, Ultra High-Speed HDMI® Cable Certification Test, and HDMI trademark

are registered trademarks of HDMI Licensing Administrator, Inc.
This information is provided for convenience only. This information is not and should not be regarded as official information of the HDMI Forum.

For the official information on HDMI®, please visit the website https://www.hdmi.org/, or obtain it directly from the HDMI Forum.


1. What is the HDMI Certification process? How to become an HDMI member?

For the certification process, membership application, and test preparation documents, please refer to the HDMI Certification Process page.

2. Which party pays the HDMI royalties, OEM or original manufacturer?

The license holder needs to pay royalties. In other words, the company and contact person filled in on the CDF are the units to be paid for the royalties. 

3. My product has been certified, can it be found on the HDMI website?

No. In the past, the association’s website did list certified products on the official website. But since the end of 2015, the association no longer lists certified products on the official website.

Since the association requires HDMI products to use certified connectors, the connector part continues to be listed on the official website.

<Please click me to find the certified HDMI connector>

4. What should I do if my product needs more Family Model?

There are two conditions: testing is in progress or testing is completed

(1) Testing

Family Model list:

When performing ATC certification, if the main certification model has an extended model (Family Model), no additional testing is required. Please fill in the extended model information on the Family page of the CDF before the certification, and we will help you submit it to the Association for review. The extended model must meet the following three conditions:

  1. The extended model does not have any hardware changes (except for appearance, case design, or color changes).
  2. No software & firmware changes for extended models.
  3. There are no changes to the HDMI hardware and circuit design on the extended model.

*When filling in CDF, the number and model of the Family Model do not include the main model.


(2) Testing Completed

If your product has been certified, but you need to add a Family Model, you can contact the laboratory for a Self-test. After the test is completed, the laboratory will provide you with a Self-test report, which you need to submit to the HDMI official website And get the Confirmation Letter, and the HDMI test process is completed.

5. If ModelA products use multiple/different types of connectors, do I need to retest?

Yes. The association has stated that if the connector of your product has a second source, it needs to be tested again. The test content includes all HDMI test items.

6. What are the customer conditions for self-test report?
  • The customer must be a member of the association <Membership List>
  • Must have made the same type of product and obtained HDMI ATC certification(according to product category)
    • Example: If you have a product that is a laptop that has passed HDMI ATC, the next desktop computer can perform Self-test
7. What is the difference between Self-test and ATC?

The following is the integration of test executives, test items, report formats, certificates and notice.



8. If the HDMI product supports HDCP related instructions?

If the product t supports HDCP at the same time, HDCP is different from HDMI, and there is no requirement that it must be backward compatible. In other words, your product can only support HDCP 2.x but does not require support for HDCP 1.x.

9. Can the sample be retrieved after the test is completed?

If your product has passed the certification and got the certificate, you can get the sample back.

10. HDMI logo format and regulation?

For the HDMI logo regulations, please refer to the HDMI official website regulations: https://www.hdmi.org/resource/logos

11. If applying for a Family Model, can the model filled in be sold by non-HDMI members?


Please follow the instructions below to apply:

  1. The Applicant Information company name in the CDF must be an HDMI member.
  2. Brand names of non-HDMI members can appear in Product Brand Names and Family models.
  3. If the certified product will apply for Family models for multiple manufacturers at the same time, please be sure to list the manufacturer's name and the corresponding product model in detail on the CDF Family page.

*Please comply with the regulations of the extended model (Family Model), please refer to the HDMI test process for detailed conditions.