Audio is an essential part of the television experience, as the quality and ‘perception’ of sound enhances the image on screen. A number of new techniques have been developed that will heighten the experience and bring it to a new level, while allowing the audience to personalize their experience.

Twenty years ago, the ITU Radiocommunication Sector’s Study Group 6 approved Recommendation ITU-R BS.775 which established 5.1 channels as the surround sound system for broadcasting. This involved the optimum use of five loudspeakers set at ear level surrounding the audience plus a low-frequency sub-woofer.