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SMPTE 421, [2] informally known as VC-1, is a video coding format.Most of it was initially developed as Microsoft's proprietary video format Windows Media Video 9 in 2003. . With some enhancements including the development of a new Advanced Profile, it was officially approved as an SMPTE standard on April 3, 2
It could be used for streaming a recorded video from a PC media center to a portable player, or a live video from a digital video camera to a TV. Support for the H.263 baseline is mandatory. The MPEG-4 Visual Simple Profile, and H.263 profiles 3 and 8 are optionally supported, and covered in the specification.1
The VC-6 codec is optimized for intermediate, mezzanine or contribution coding applications. [2] Typically, these applications involve compressing finished compositions for editing, contribution, primary distribution, archiving and other applications where it is necessary to preserve image quality as close to the original as possible, whilst reducing bitrates, and optimizing processing, power ...
Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...
Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.