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AC-4 revolutionizes TV sound, accessibility, and spatial audio

AC-4 revolutionizes TV sound, accessibility, and spatial audio

Dolby AC-4 audio compression technology is changing the landscape of speech intelligibility, personalization, and three-dimensional surround sound. Consumers, production houses and broadcast centres, as well as platforms all benefit from AC-4 which reduces bandwidth and costs. Dolby and SRF presented it to the broadcast community for the first time on June 9 at Studio Leutschenbach (Zurich) during the Nations League match between Switzerland and Spain produced in Geneva.

S-ADM workflow demo SRF IP-Lab

S-ADM workflow demo SRF IP-Lab

With the goal to optimize bandwidth-use and enable personalized audio experiences in the future, Swiss broadcaster Schweizer Radio und Fernsehen (SRF) has been experimenting to use S-ADM in their SMPTE ST2110 based IP environment. A selection of open-sourced prototype tools by Dolby were used to generate and analyze dynamic metadata in real-time. The balance of beds and objects of a typical sports production with mult-language commentaries were modified on a mixing desk, with changes traveling as metadata through the broadcaster‘s infrastructure.