SCTE Issues CALM Best Practices

The SCTE has published a new standards document, SCTE 197 2013, that is designed to help cable  operators and programmers comply with federal Commercial Advertisement Loudness Mitigation (CALM) Act mandates.

"Recommendations for Spot Check Loudness" provides best practices for measuring the audio content carried in a single programming channel of a program network, aligned with techniques discussed in Advanced Television Systems Committee standard A/85, "Recommended Practice: Techniques for Establishing and Maintaining Audio Loudness for Digital Television." SCTE 197 provides guidelines for recording measured loudness and loudness metadata value, as well as approaches for interpretation of the collected data and for actions to be taken in the case of discrepancies.

The new document was developed under the SCTE Digital Video Subcommittee (DVS) Audio Drafting Group. It's available at

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