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  2. Compression artifact - Wikipedia

    en.wikipedia.org/wiki/Compression_artifact

    Also, quantization noise can be "hidden" where they would be masked by more prominent sounds. With low compression, a conservative psy-model is used with small block sizes. When the psychoacoustic model is inaccurate, when the transform block size is restrained, or when aggressive compression is used, this may result in compression artifacts.

  3. FaceTime - Wikipedia

    en.wikipedia.org/wiki/FaceTime

    The iOS 7 betas limited FaceTime Audio to calls placed on a Wi-Fi network (the same original limitation of the video version of FaceTime), but the final release has removed that restriction to allow it to work over 3G and LTE data connections, as is the case with most carriers and plans about FaceTime with video.

  4. Sound masking - Wikipedia

    en.wikipedia.org/wiki/Sound_masking

    Sound masking is the inclusion of generated sound (commonly, though inaccurately, referred to as "white noise" or "pink noise") into an environment to mask unwanted sound. It relies on auditory masking. Sound masking is not a form of active noise control (noise cancellation technique); however, it can reduce or eliminate the perception of sound ...

  5. List of built-in iOS apps - Wikipedia

    en.wikipedia.org/wiki/List_of_built-in_iOS_apps

    FaceTime is a videotelephony app available on supported iOS devices running iOS 4 and later which allows for video calls between participants using any camera of their device. FaceTime Audio, an audio-only version, is available on any iOS device that supports iOS 7 or newer. [ 17 ]

  6. Speech coding - Wikipedia

    en.wikipedia.org/wiki/Speech_coding

    Speech coding is an application of data compression to digital audio signals containing speech.Speech coding uses speech-specific parameter estimation using audio signal processing techniques to model the speech signal, combined with generic data compression algorithms to represent the resulting modeled parameters in a compact bitstream.

  7. Comfort noise - Wikipedia

    en.wikipedia.org/wiki/Comfort_noise

    the speech may sound "choppy" (see noise gate) and difficult to understand; the sudden change in sound level can be jarring to the listener. To counteract these effects, comfort noise is added, usually on the receiving end in wireless or VoIP systems, to fill in the silent portions of transmissions with artificial noise.

  8. Comparison of user features of messaging platforms - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_user...

    Video calls: up to 3 members. WhatsApp is an American freeware, cross-platform messaging and Voice over IP (VoIP) service owned by Facebook, Inc. [187] It allows users to send text messages and voice messages, [188] make voice and video calls, and share images, documents, user locations, and other media.

  9. Noise control - Wikipedia

    en.wikipedia.org/wiki/Noise_control

    Using a combination of sound absorption materials, arrays of microphones and speakers, and a digital processor, a restaurant operator can use a tablet computer to selectively control noise levels at different places in the restaurant: the microphone arrays pick up sound and send it to the digital processor, which controls the speakers to output ...