Dolby’s Speech-Gating Reference Code

Now available as a free download.

Accurate loudness estimation is an important element of any broadcast chain. It allows a broadcaster to regulate program loudness, which minimizes the viewer annoyance from shifting loudness levels between programs, advertisements, and channels.

Dolby’s approach to this problem is Dialogue Intelligence™, a speech-gating technology that only measures loudness on the segments of a program that contain dialogue. This is effective because:

Content creators typically set dialogue at a fixed level and mix other content around it.

Viewers typically adjust their television volume controls according to the audibility and intelligibility of dialogue.

To enable you to create and integrate the most effective loudness measurement solutions for your situation, we are offering the reference code for the algorithm behind our unique Dialogue Intelligence as a free download. Dolby also offers an enhanced loudness measurement program that includes optimized code for Dialogue Intelligence and the main loudness measurement algorithms, access to technical support, and use of appropriate Dolby trademarks.

Apply for a license for the enhanced loudness measurement program.

To receive the free reference code, simply complete the form below and read and accept the agreement.

* Indicates a required field
Company website
Country of company headquarters
Type of company*
Is your company a current Dolby licensee?*
Please provide details of the product or products in which you wish to include speech gating.*
Other comments

Please select the "I AGREE" checkbox to acknowledge your acceptance of these terms and continue your application process.