xHE-AAC Codec Test Service

xHE-AAC (the combination of Extended HE-AAC and MPEG-D DRC) is the latest addition to the MPEG AAC codec family and bridges the gap between speech and audio coding. It provides consistently high-quality audio for all signal types, such as speech, music or mixed content, at all bit rates ‐ starting as low as 6 kbit/s for mono and 12 kbit/s for stereo services, up to 500 kbit/s and above. This makes xHE-AAC the audio codec of choice for digital radio and adaptive streaming applications.

The Codec Test Service

The xHE-AAC Codec Test Service is a web-based service offered by Fraunhofer IIS to verify implementations of xHE-AAC encoding and decoding against the MPEG standards. It provides an environment for adopters of xHE-AAC to test their xHE-AAC integration. The service extends and expands the basic MPEG conformance tests to include tests for encoding, adaptive streaming, MPEG-D DRC and additional aspects that are out of scope in the MPEG conformance. It tests against ISO/IEC 23003-3 and ISO/IEC 23003-4 specifications.

The service consists of:

  • a decoder test suite
  • an encoder test suite

It is free of charge and may be accessed by registering with the form below.

The Test Process

Failing test results are automatically and exclusively reported to the registered user. If all tests are successful, the results including a unique identifier will be sent to the registered user and, with the manufacturer's approval, to Fraunhofer IIS. We define the scope and constraints on a page that is accessible for authenticated users only.

For testing encoders

  1. Register using the form below.
  2. Once your registration is confirmed by Fraunhofer IIS, your account will be enabled.
  3. Download the encoder test package and encode the test files using your xHE-AAC encoder implementation.
  4. Upload your encoder's output files as a zip archive to the test service website.
  5. The site will analyze your bitstreams and return a test report to you. Uploaded bitstreams and analysis data will be erased at the conclusion of the tests.

For testing decoders

  1. Register using the form below.
  2. Once your registration is confirmed by Fraunhofer IIS, your account will be enabled.
  3. Download the decoder test package and decode the test files using your xHE-AAC decoder implementation.
  4. Upload your decoder's output files as zip archive to the test service website.
  5. The site will analyze your audio files and return a test report to you. Uploaded audio files and analysis data will be erased at the conclusion of the tests.

Terms and Conditions

1. Description

The xHE-AAC Codec Test Service offers a tailored test suite containing audio files, bitstreams or other test tools ("test suite") to qualified manufacturers and users for testing their xHE-AAC codec implementations used in software products or devices. It is provided by Fraunhofer IIS for professional use only.

The xHE-AAC Codec Test Service allows manufacturers and users to upload the output files from their product testing generated by processing the test suite. The output files will be analyzed by a computer program running on the xHE-AAC Codec Test Service web server and an automatic test report will be sent to the user informing them whether their uploaded output files pass the xHE-AAC codec tests. All tests are conducted by manufacturers and users themselves and in no event is a manufacturer or user permitted to claim any approval or endorsement by Fraunhofer of its products nor to give the impression that Fraunhofer is involved in any verification tests conducted by them. The test suite and any test reports are proprietary information of Fraunhofer and solely for manufacturer’s and user’s internal usage and review. Manufacturers and users are allowed to publicly disclose the fact of their successfully tested products, but are not allowed to disclose test reports except to Fraunhofer.

2. User qualification

Registration and qualification for the use of the xHE-AAC Codec Test Service includes an individual, manual activation step on behalf of Fraunhofer. Fraunhofer reserves the right to deliver the test suite only to qualified manufacturers and users. Qualification is dependent on professional use and in conformance with the German export control laws and regulations. To approve the qualification, manufacturers and users are obligated to submit additional information as requested below.

3. Software license type

  • The test suite license is for internal use only and can be used only for a limited time period as described in the Test Suite License Agreement
  • Copying, modifying, decompiling, analyzing, reverse engineering or distributing any parts of the test suite and/or test reports is prohibited.

xHE-AAC is a registered trademark of Fraunhofer in Germany, the United States and other countries.

Requesting Registration for the xHE-AAC Codec Test Service

Please fill in the following information to register for the xHE-AAC Codec Test Service.

All fields marked with * are mandatory.