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LDAC is an alternative to Bluetooth SIG's SBC codec. Its main competitors are Huawei's L2HC, Qualcomm's aptX-HD/aptX Adaptive and the HWA Union/Savitech's LHDC. [1]LDAC utilizes a type of lossy compression [2] [3] by employing a hybrid coding scheme based on the modified discrete cosine transform [4] and Huffman coding [5] to provide more efficient data compression.
For the Bluetooth Low Energy stack, according to Bluetooth 4.0 a special set of profiles applies. A host operating system can expose a basic set of profiles (namely OBEX, HID and Audio Sink) and manufacturers can add additional profiles to their drivers and stack to enhance what their Bluetooth devices can do. Devices such as mobile phones can ...
The host stack is generally implemented as part of an operating system, or as an installable package on top of an operating system. For integrated devices such as Bluetooth headsets, the host stack and controller stack can be run on the same microprocessor to reduce mass production costs; this is known as a hostless system.
Screenshot of an iOS 17 home screen, displaying various built-in apps. Apple Inc. develops many apps for iOS that come bundled by default or installed through system updates. . Several of the default apps found on iOS have counterparts on Apple's other operating systems such as macOS, iPadOS, watchOS, and tvOS, which are often modified versions of or similar to the iOS applicati
Apple ported its iWork suite from the Mac to the iPad, and sells pared-down versions of Pages, Numbers, and Keynote apps in the App Store. [40] Although the iPad isn't designed to replace a mobile phone, a user can use a wired headset or the built-in speaker and microphone to place phone calls over Wi-Fi or 3G using a VoIP application. [41]
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This allows output of the audio of protected video content within iTunes, and also correctly maintains the audio sync with the image displayed on-screen. Video is synced with output audio when playing the video through an AirPort Express if the video is in a format supported by QuickTime Player (such as HTML 5 video in Safari etc.).
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