HDS

Adobe’s adaptive bitrate (ABR) technology, known as HTTP Dynamic Streaming, uses AVC/H.264 encoding of elementary streams. It can be used for both unbounded (live) and bounded (on-demand) content playback. HDS relies on Fragmented F4V File Format (F4F) for fragmenting content. F4F is an Adobe-specific derivative of ISO Base Media File Format (ISO BMFF or fMP4). F4F is capable of combining elementary audio and video streams late in the delivery process, meaning that these streams need not be multiplexed together. HDS controls multiple-resolution F4F files via the F4M manifest file format. Adobe has opened up the HDS specification, documenting use the F4F and F4M to allow HTTP-based streaming playback in Adobe Flash Player and Adobe AIR. [http://www.adobe.com/devnet/hds.html] The company has also announced DASH support across its product line, slated for 2014 release.