Eyeheight’s video legalising technology took center stage for the worldwide transmission of the BBC output for the annual Wimbledon Open tennis tournament, via Hyperactive Broadcast. “The LE-2M ensured that video content captured throughout the series, conformed to internationally agreed signal levels, given the variation in light levels and bright reflections,” commented Martin Moore, sales director, Eyeheight.
The LE-2M auto-detects incoming SDI or HD-SDI video at 1080i/50/59.94, 720p/50/59.84, 625/50 or 525/59.94, and applies the appropriate legalising format; to conform to EBU-R 2003 standard SDI settings, and 7.5 IRE or 0 IRE Pedestal. It then ensures that the incoming signal video is held within user-selected colour-space parameters: RGB, YUV, composite (PAL or NTSC), or RGB-and-composite combined. Up to six LE-2M or LE-2MK legalisers can be housed in a 1U Eyeheight FB-9E smart chassis, with an integral web server and optional FP-9 front control panel.
Additional features include the clobberRing automatic luma overshoot and undershoot suppression, together with luma and chroma gain, black level adjustment, hue rotation, adjustable clipping levels and soft-clipping-knee levels. An ‘out-of-gamut’ indication feed displays overshoot or undershoot severity, and displays signal corrections.
The LE-2M-K variant provides real-time control of perceptual loudness and true peak level, using ITU-R BS.1770 estimation algorithms, coupled with proprietary correction algorithms. Embedded stereo or surround audio loudness is monitored, and system gain is adjusted across channels to maintain the loudness limit, while preserving the audio imaging. The processor also performs 8x over-sampling true-peak estimation, and instantaneous correction on all stereo or surround channels, ensuring that peak-programme level limits are adhered to.