IBC, Amsterdam (4.A61h): “Low bitrate, low latency, high quality – pick two” sums up the current state of audio codecs for broadcast contribution. A demo of Opus at IBC aims to show that you can now have all three. Opus is a low-delay, royalty-free audio codec designed for a wide range of audio applications and is used in Skype, WebRTC and on the Playstation 4. A specification for using Opus in a standard MPEG Transport Stream was recently written meaning it could be used in broadcast contribution for the first time.
The IBC demo will show a live 1080i feed from a camera going into a 1/2U OBE C-100 encoder, encoded as high bitrate H.264 video and low bitrate Opus audio in an MPEG Transport Stream and into a 1U OBE C-100 decoder with an end to end latency of around 300ms.
The Opus in MPEG-TS standard is published freely online and is available for all manufacturers to implement without royalties.
More detailed technical information can be found on our blog: http://obe.tv/about-us/obe-blog/item/14-using-opus-audio-in-broadcasting