How digital technology has changed editing

How have digital signals changed editing?

Technology is evolving faster than ever before. Things are still changing. There are massive developments still happening in the digital industry, changing the way we look at gadgets and how we include them in our everyday lives. E.g the change from terrestrial to digital transmission in UK in 2012.
Easier manipulation, new digital hardware and software makes previously labourious tasks easier and faster.
Digital errors can be undone. Back in the times of physical film being used in the process of film post production, one error during the splicing process could not be undone, meaning it was damaged, leaving less oppotunity for mistakes.
In contrast to physically editing magnetic tape, digital programmes allow you to make a visual representation of a sound wave and the time line. You can highlight and edit a particular section and undo anything you are not satisified with or a mistake you made.
It is also easier to back up files, another procedure to protect files. However, analouge video loses quality when copied.
The thing about video editing is that it is non destructible. Whatever footage you edit, it is not actually altered before its final save. This because everything from cuts to transitions are just commands that the computer has followed but can be undone. A digital signal is just a sequence of numbers, so a digital signal can be stored, transmitted, and reproduced exactly – every copy is the same as the original. Mathematics can be used to detect and correct errors. However, with noise or weak reception, a digital signal degrades much less gracefully than analog.
A digital transmission is in the form of a sequence of “true” / “false” settings – commonly described as “zeroes” and “ones” – at a steady signal amplitude (meaning “volume” or “strength”) whereby a machine be programmed to make decisions on its contents

Digital technology has several advantages among which are;
– enables transmission of signals over a long distance.
– transmission is at a higher rate and with a wider broadband width.
– it is more secure.
– it is also easier to translate human audio and video signals and other messages into machine language.
– there is minimal electromagnetic interference in digital technology.
– it enables multi-directional transmission simultaneously.
Compression – placing two parts together, used in photos to make them smaller and allow much more to be stored on hard disk for example JPEG

Sound and video together becoming one file is compression, as it is combined and becomes smaller.

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