Differences between ypbpr and YCbCr

Transfer: Http://blog.csdn.net/kickxxx/article/details/7086888

In the past few days, the component video input involves the representation of the component video, and comes into contact with the concepts of ypbpr and YCbCr. It is found that not only their own projects, but these two concepts are out of order, that is, the Internet is also filled with a lot of false statements.

The component interface has two names: ypbpr and YCbCr, which are two completely different concepts. The concept of YCbCr is earlier than that of ypbpr.

History

Early DVDs were displayed in different rows. The advantage of using YUV (YCbCr) color space for data storage and transmission is that it reduces storage space and data transmission bandwidth, at the same time, it is convenient to be compatible with black and white TVs. Therefore, almost all the component terminals of the DVD machine with component output are marked as YCbCr (YUV). Everything seems reasonable, but this has laid the foundation for conceptual confusion in the future. Until one day, a row-by-row DVD appeared, and manufacturers made it difficult to identify the row-by-row component terminals until the emergence of the American Standard ypbpr, many manufacturers used ypbpr to represent row-by-row, use YCbCr to represent the row separation. This violates the ypbpr standard. The ypbpr American standard only marks the analog video component interface and supports 525i,
625i, 525 P, 625 p, I, P, etc., does not distinguish row by row or interlace.

Correct Representation

YUV (YCbCr) is the input interface of 525i/625i (480i/576i)

Ypbpr is the component Input Interface Standard (line-by-line and line-by-line) from I to P. It is shared with the line-by-line component terminals and marked as ypbpr, both the line-by-line and line-by-line component signals are input from this port.

Incorrect Representation

1. Separate the line-by-line component terminals and line-by-line component terminals. YCbCr indicates the line-by-line component terminal, and ypbpr indicates the line-by-line component terminal.

2. The line-by-line component terminals and line-by-line component terminals are shared, expressed by ypbpr/YCbCr. Both the line-by-line component signal and the line-by-line component signal are input from this terminal.