Deinterlacing of the interlaced video signal can be performed at different points in the TV production chain.
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.
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.