The Moscow headquarters of Russian media conglomerate Russian Media Group include five radio stations and two television stations. Starting a decade ago, the radio stations began rebuilding their facilities using an Axia Livewire AoIP infrastructure. Axia AoIP consoles, Telos phone systems and digital hybrids, and Axia xNodes were used both as the system core and also to extend the Livewire infrastructure to AES digital audio, and analog audio. Livewire’s ability to handle general purpose interface (GPI) information together with the physical GPIs provided on Axia xNodes and Axia consoles extended the core infrastructure to include GPI on equipment that did not support Livewire+ AES67 AoIP natively. The AoIP infrastructure was soon used throughout all of the radio studios including ISDN interfaces for outside broadcast.Read More
Video and audio were handled separately for years before SDI video with embedded audio came into use. Embedded audio appeared to be a step forward. The reality is that embedded audio has not reduced lip sync issues and metadata is still easily separated from the audio that it describes. This is particularly unfortunate because metadata will become more essential with new audio services. Audio embedding and de-embedding was never perfect and it remains limited. SDI is, at heart, a video format and it cannot support the future of audio. Channel based audio is heading for replacement by carriage of the objects that make up the channels. Multiple languages, emergency audio, and services for the blind are all competing for space in broadcast services. These expanded audio services provide flexibility and enhanced consumer experiences for broadcast and OTT services and even handheld devices. AES67, Livewire+ and related standards offer a path to making all of this work – including lip sync! AES and SMPTE are working together, and the results will enable the sub-sample accurate linking of Audio over IP (which has existed in radio for over a decade and is growing in TV) and video, all without requiring it to be glued together until final delivery.Read More
Over the past several years, the worldwide attention of audio loudness in television broadcasting has grown and it’s now common knowledge that both proper audio measurement and loudness control are required in all aspects of content delivery. Today, there is a new international standard for measuring loudness. Knowing what it is, and understanding how to use it, are critical steps in making reliable and useful loudness measurements.Read More
Topics: Audio Loudness
If you love broadcast audio, you'll love Direct Current! Get it delivered to your inbox weekly!