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Advanced video codec iphone11/14/2023 ![]() ![]() ![]() ![]() Without the use of the provided DSPs, battery life suffers - typically by a factor of 2.5 - even with the most efficient software decoders. However, this came at a cost: increased CPU load and the need for dedicated decoding hardware, especially on embedded devices like the iPhone. MPEG’s fourth generation video codec introduced radical improvements over previous generations with dramatically decreased bandwidth needs. In the mid 00s, a new kid arrived on the block and remains the dominant video codec on optical media, digital television broadcasting, and online distribution: H.264/AVC/MPEG-4 Part 10. This chip can be found on the Wallstreet, Lombard, and Pismo PowerBook generations, as well as on their professional desktop equivalents.Īpple never exposed a public API, so DVD playback was limited to its own application until the introduction of Mac OS X in 2001, which initially did not include a DVD playback application at all.īy the early 2000s, CPUs and batteries were evolving in a way that they could reasonably decode MPEG-2 video without help from a dedicated chip - at least as long as there wasn't any further demanding process running on the machine (like Mail.app, which constantly checked a remote server). The solution was to add a dedicated decoding chip by C-Cube to the motherboard for all the heavy lifting. Subsequently, Apple added DVD drives to its PowerBooks and ran into an issue: the combination of G3 PowerPC CPUs and batteries was not efficient enough to play a full DVD on a single charge. Up until this point, only specialized computers with certain graphics hardware were able to play color video.īy the end of the century, DVDs had been introduced using the then state-of-the-art MPEG-2 video codec. With the introduction of QuickTime 1.0 and its C-based API in the early 90s, you were able to have a thumbnail-sized video playing, with up to 32,768 possible colors per pixel decoded solely by the CPU. When video decoding with software on computers became popular, it was revolutionary. Only then can we talk about implementation details.Ī Brief History of Hardware Accelerated Decoding on MacsĬPU load is expensive and codecs are complex. In order to get a grasp on what is happening on our machines, we first need to understand the underlying concepts. The process of decoding a video on OS X and iOS is complex. ![]()
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