Note For a great overview of the AAC format, check out this blog post by my Adobe Developer Connection colleague, Fabio Sonnati HEAAC v2 A quick technical overview. HLS vs. HDS What Is the Difference and Why You Should Care. No more missed important software updates UpdateStar 11 lets you stay up to date and secure with the software on your computer. This page shows your currently installed Flash player version. Learn about how Adobe Scout works and how to use it. HLS vs. HDS What Is the Difference and Why You Should Care. Unless you work daily in the streaming business, its sometimes hard to get into the nuances of technologies, and what the impact is for your long term strategy. HLS and HDS are both HTTP based streaming protocols, and sound very similar, but are fundamentally very different. HLS stands for HTTP Live Streaming and is Apples proprietary streaming format based on MPEG2 TS. Its popular since it provides the only way to deliver advanced streaming to i. OS devices. It often mistakenly gets defined as HTML5 streaming, but is not part of HTML5. Adobe Hds Test Player' title='Adobe Hds Test Player' />Apple has documented HTTP Live Streaming as an Internet Draft Individual Submission, the first stage in the process of submitting it to the IETF as an Informational Standard. However, while Apple has submitted occasional minor updates to the draft, no additional steps appear to have been taken towards IETF standardization Wikipedia. HDS stands for HTTP Dynamic Streaming and is Adobes format to deliver fragmented mp. MP4.  HLS uses MPEG 2 Part 1, while HDS uses MPEG 4 Part 1. Part 1. 2. Both formats are MPEG based, so why should you care Adobe, Microsoft and Transitions wrote an interesting white paper highlighting the advantages of f. Complete, huge, mostly technical computer information Site. PHONES All Types ANDROID Smart Phones and Devices CDMA Cell Phones Cell Phones CONVERT ESN. A week with the Xbox One X How it compares to a living room PC Microsofts latest console makes for a much better HDR BluRay player than your PC. Review of the Philips 288P6LJEB 28 inch 4k Ultra HD LED Monitor. Features, Specs, Pricing, Pros Cons. Read Before You Buy and Find Where it is For Sale. Webopedias list of Data File Formats and File Extensions makes it easy to look through thousands of extensions and file formats to find what you need. MP4 HDS over MPEG2 TS HLS. Separating Content and Metadata. With MP4 les, metadata can be stored separately from audio and video content or media data. Conversely, M2. TS multiplexes combines multiple elementary streams along with headermetadata information  This separation of content and metadata allows specication of a format using movie fragments optimized specically for adaptive switching between different media data, whether that media data is varying video qualities, multiple camera angles, different language tracks or even different captioning or time texted data. All crucial features multiple camera angles for interactive TVlive sports, language tracks and especially effective captioning support with the upcoming government requirements. Independent Track Storage. In fragmented MP4 f. MP4, elementary streams are not multiplexed and are independently stored separate from metadata, as noted above. As such, f. MP4 le storage is location agnostic and can store audio or video only elementary streams in separate locations that are addressable from XML based manifest les. A must have feature, especially for large media libraries like the one from Netflix This plethora of combinations can quickly become unwieldy, with upwards of 4. DVD example. Netix estimates using an M2. TS HLS approach for their library could result in several billion assets, due to combinatorial complexitya situation they avoid by using an f. MP4 elementary stream approach, by selecting and combining tracks on the player. Trick play modes. Trick play modessuch as fast forward or reverse, slow motion, and random access to chapter pointscan be accomplished via intelligent use of metadata. A bit more optional, but certainly useful. Backwards compatibility to MPEG 2 Transport Streams. Separating timing information from elementary video and audio streams allows conversion from several fragmented MP4 elementary streams into a multiplexed M2. TS. HLS is similar to what FLV with ON2 VP6 was before Adobe endorsed H. Seamless stream splicing. Fragmented MP4 audio or video elementary streams can be requested separately because each movie fragment only contains one media type. Using independent sync points for media types along with simple concatenation splicing yields shortened segment lengths M2. TS segment lengths are typically ten seconds, limiting frequency of switching and require extra bandwidth and processing. Segment lengths for f. MP4 can be as low as 1 or 2 seconds as they dont consume more bandwidth or require extra processing. Windows 2000 Professional Sp4 Iso. Absolutely crucial for live sports it means the difference between close to real time TV broadcast, and tens of seconds delayed. Integrated Digital Rights Management DRMInherent to the MPEG 4 specication, digital rights andif necessaryencryption, can both be applied at the packet level. In addition, the emerging MPEG Common Encryption ISOIEC 2. Postponing A Meeting Template more. CENC scheme can be combined with MPEG 4 Part 1. DRM and elementary stream encryption. Without DRM no premium content. Caching efciencies. When considering comparative complexity, noted in the sidebar above, its also worth considering the effect that all the possible combinations has on cache efciency. Each track and bitrate combination required for M2. TS delivery means a higher likelihood that an edge cache will not have the particular combination, resulting in a request back to the origin server. Important for HD content and the increasing traffic volume. It also directly saves delivery costs. Bandwidth efciencies in segment alignment. A key factor when generating multiple les at different bitrates is segment alignment. HTTP adaptive streams via f. MP4 relies on movie fragments each being aligned to exactly the same keyframe, whether for on demand or live streaming live requires simultaneous encoding of all bitrates to guarantee time alignment. A packaging tool that is fragment alignment aware maintains elementary stream alignment for previously recorded content. Same as above, the efficiencies reduce bandwidth, increase user experience and battery life. And what does this mean for open standards Its certainly quite a while away, especially since codec licensing costs are making HTML5 codec standardization very challenging, but the most promising initiative is MPEG Dash. MPEG DASH. MPEG, the standards body responsible for MPEG 2 and MPEG 4, is addressing dynamic adaptive streaming over HTTP MPEG DASH through the use of four key prolestwo around CFF for f. MP4 and two for MPEG 2 TS. For f. MP4 both the live ISO LIVE and on demand ISO ON DEMAND proles reference Common Encryption CENC or ISO 2. ISO LIVE, a superset of live and on demand proles, is close to Microsoft Smooth Streaming, meaning Microsoft could easily update its server and client viewers to meet DASH compliance. Update In addition, when comparing the two different approaches, its important to understand the following TV is moving to the web. That means watching more content in traditional online venues browsers, mobile apps, etc and also the development of hybrid TV models where MVPDs utilize webOTT TV technologies to send broadcast TV to connected TVs as well as browsers and mobile devices. While MPEG2 is the technology stack for legacy IPTV, the stack that will be used for this new OTTWebHybrid model is still being determined. This is why the whitepaper is interesting. One thing that is clear is that HTTP streaming will be the backbone of the stack. This is why its important that the container chosen for this new model work well in the context of HTTP streaming. How well it works for legacy streaming is not relevant. Conclusion. HDS f. MP4 has some key advantages over HLS, and is recognized by the industry as the better future solution. Reduces delivery costs. Supports more features, most of them critical. Better user experience. Future safe formati. OS does not support f. MP4 yet and its hard to predict Apples strategy, but with f. MP4s full backward compatibility to HLS, and the fact that media servers like Flash Media Server support both HDS and HLS with one workflow, f. MP4 is the best investment for your future media delivery strategy.