Digital Video Processing for Engineers

6

Video Deinterlacing

Chapter Outline

6.1 Basic Deinterlacing Techniques

6.2 Motion-Adaptive Deinterlacing: The Basics

6.3 Logic Requirements

6.4 Cadence Detection

6.4.1 Another feature that is becoming standard in advanced deinterlacers

6.5 Conclusion

In the days of CRT the video sent to the TV was interlaced (the meaning of which will be discussed later) and the TV monitor on which it was displayed worked perfectly for that format. However, most TVs and monitors are now LCD or Plasma, and these have no ability to interpret interlaced video.

Video deinterlacing techniques were developed to address the problem of legacy interlaced video that was required by old analog televisions.

First we need to understand interlaced video (see Figure 6.1). Consider ...