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Video manipulation is a type of media manipulation that targets digital video using video processing and video editing techniques. The applications of these methods range from educational videos [ 1 ] to videos aimed at ( mass ) manipulation and propaganda , a straightforward extension of the long-standing possibilities of photo manipulation .
Vasa praevia or vasa previa is a complication of obstetrics in which fetal blood vessels cross or run near the internal opening of the uterus. Since these vessels are not protected by the umbilical cord or placental tissue , the rupture of the fetal membranes during birth causes them also to rupture, leading rapidly to death of the fetus.
YouTube originally offered videos at only one quality level, displayed at a resolution of 320×240 pixels using the Sorenson Spark codec (a variant of H.263), [29] [30] with mono MP3 audio. [31] In June 2007, YouTube added an option to watch videos in 3GP format on mobile phones. [ 32 ]
Clipping can occur within a system as processing (e.g. an all-pass filter) can change the phase relationship between spectral components of a signal in such a way as to create excessive peak outputs. The excessive peaks may become clipped even though the system can play any simple sine wave signals of the same level without clipping.
The main cause of ringing artifacts is overshoot and oscillations in the step response of a filter.. The main cause of ringing artifacts is due to a signal being bandlimited (specifically, not having high frequencies) or passed through a low-pass filter; this is the frequency domain description.
Clipping can be detected by viewing the signal (on an oscilloscope, for example), and observing that the tops and bottoms of waves aren't smooth anymore. When working with images, some tools can highlight all pixels that are pure white, allowing the user to identify larger groups of white pixels and decide if too much clipping has occurred.
This can happen due to the low capacitance of the filter capacitor. In a smps the switching fequency is more dominant in the ripple voltage. In a regulated power supply the ripple voltage is rejected. So the AC line frequency can affect the clipping behaviour only in unregulated linear power supplies. Nxavar 19:06, 4 April 2021 (UTC)
Increasing the audio volume can lead to distortion if, on playback, multiplying the audio data by the global gain may increase the volume past its clipping threshold. Audio recordings that use Compressed audio to cap the overall volume may have already adjusted the global gain field. This may limit the ability to further amplify the recording ...