AC4
AC4, occasionally written AC-4, is a designation used in different contexts to denote different things. The most widely recognized use is Dolby AC-4, a digital audio coding format developed by Dolby Laboratories for broadcast and streaming. Dolby AC-4 is designed to deliver high-quality audio at lower bitrates and to support flexible delivery across a range of networks and devices. The format supports scalable coding, object-based audio capabilities, and metadata to enable accessibility and user preferences; it is compatible with current transmission standards and can be integrated into television, streaming services, and devices that decode Dolby-encoded content. Dolby AC-4 aims to provide improved efficiency over its predecessor, Dolby Digital Plus, while enabling features such as multi-channel audio and personalized listening experiences.
In other domains, AC4 may refer to product codes, model numbers, or organizational designations that are not