Inverse Telecine

Inverse telecine (IVTC) is a procedure in which telecine is reversed with the help of video editing tools. It is the process of converting a film from 24 fixtures per second to its original frame rate, into video consisting of 60 fields per second. This expression is also used for apparatus used in post production.

This expression allows a motion picture originally reproduced on a film stock to be viewed with standard video equipment such as television sets or computers.

Inverse Telecine

Instead of shifting fields from one frame to another, various techniques are used. Inverse telecine is done to improve the quality of the video. When a video is digitally encoded, there may be degradations in quality due to the whole compression process.

Inverse telecine is used to ensure that the quality of the digital output is up to standards. During this process, in the case of movies, the original 24 movie frames per second are reconstructed from the input video before encoding the content.

Field matching is the first step of the IVTC process. It is important to combine the field pairs that make the best matches to avoid as much post-processing as possible.

Second step is Decimation; Since frames with extra areas should now be in a normal layout, we're removing them from the video, this is often referred to as decimation.

And the last step is Interlace Artifacts. This is a much simpler process than deinterlacing because no decision needs to be made as to whether there is movement between two fields in the same frame, but can still result in poor quality if the differences between fields are too large.

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