Deinterlacing of the
interlaced video signal can be performed at different points in the TV
production chain.
Progresive
Media
If the broadcast format or media format is progressive, then the
interlaced archive programs will need the help of deinterlacing. Generally
speaking, there are two ways for people to choose from in order to achieve
this.
First of all, people can convert
the interlaced video material to progressive scan during program production. In
this way, the best possible quality is likely to be produced for videographers
are capable of manually choosing the optimal deinterlacing method for each
frame since they have access to expensive and powerful deinterlacing equipment
and software.
Secondly, people could convert
interlaced programs to progressive scan immediately prior to broadcasting with
the help of real-time deinterlacing hardware. However, the conversion may be
inferior to the pre-production method for the processing time is limited by the
frame rate and no human input is available.
Interlaced
media
Real-time deinterlacing also plays an important role in converting
the interlaced video. If the broadcast format or media format is interlaced,
then it can work to help people. However, the quality may be not so
satisfactory because the consumer electronics equipment is rather cheap, which
means that only less processing power and simpler algorithms are available in
comparison with professional deinterlacing equipment.
On the
other hand, what can not be ignored is the fact that the majority of users are
not trained in video production, which sometimes lead to poor quality for many
people have little knowledge about deinterlacing and are no aware that the
frame rate is half the field rate. Therefore, deinterlacing is a very demanding
work which needs to be done in a careful and patient way. Only with these
efforts can people enjoy the video with the best possible quality.
