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Figure 2A shows the short-term perceptual loudness (using ITU-R BS.1770) of two interstitials leveled using a traditional peak-program level measurement of PPM6. Despite both hitting PPM6, it can clearly be seen that the fi rst interstitial has substantially higher perceptual loudness than the second. The fi rst exceeds the defi ned average perceptual loudness limit of - 24LUFS while the second is not taking full advantage of the loudness allowance. By contrast Figure 2B shows the short-term perceptual loudness (using ITU-R BS.1770) of the same two adverts once they have been individually processed using KARMAudioAU in ITU-R BS.1770 (ATSC A/85) loudness mode. Both interstitials now comply with the -24 LUFS average loudness while ensuring that full advantage is taken of the available loudness allowance. As a result of the processing audio compliance failures are eliminated and maximum use of the available loudness allowance is assured. Finally the same audio compliance features are incorporated in the real-time LE-2M-K video and audio legaliser which is designed for Broadcast presentation and playout where a hardware processor is often preferred. Embedded stereo or surround audio loudness are continuously monitored, system gain being seamlessly adjusted across all channels to stay within the loudness limit while preserving audio imaging. Eyeheight Ltd (www.eyeheight.com) was founded in 1992 by Martin Moore and Steve Crocker, BBC- trained engineers who were then working as London- based chief engineers in the post-production industry. Need Help? Call us: +44(0)1932 240 204 www.thameside.tv | firstname.lastname@example.org .tv Ingest & Transmission | Graphics & Effects | Editing | DVE & Character Gen | Film and DI | Router / Switcher | Wireless Link | Robotics | MultiViewer Signal Generators | VTR | Web Streaming | Test & Measure | Camera Equipment | Audio Equipment | Signal Processors | Vision Mixers | Monitors Ingest & Transmission Graphics & Effects Editing DVE & Character Gen Film & DI Router / Switcher Robotics Multiviewer Signal Generators VTRs Web Streaming Test & Measurement Camera Equipment Audio Equipment Signal Processing Vision Mixers Monitors Wireless Link