LCD TV picture-in-picture function

My LCD TV to see how cable can not turn picture-in-picture function? Others to do it? Or have a relationship with TV models?

“Home is the number of cable set-top box to see it?
If so, then the picture-in-picture television sets in less than sure of the television signal processing is completed by the set-top boxes, unless the set-top boxes to support the picture-in-picture.You can not turn this painting Chinese painting features, I do not know if you are not the circumstances under which the transfer of this type with a certain relationship between the different models could allow different types of picture-in-picture.
LCD TV is now essential to support the following video input:
1.TV signal
2.AV (video)
3.S-video (s terminal)
4.vga
5.dvi
6.Ypbpr (HD)
7.HDMI
top of these video formats, some video is not at the same time between the two were in the picture of the general situation is that television, av, svideo all the way to signal processing, high-definition, vga, dvi all the way to deal with Therefore, when the main screen is the way that television signals can only son of the general picture is that high-definition signals all the way, and in high-definition signals that the main screen, on-screen TV is the only way that signal.'s Popular and you talk about a Taiwan set-top boxes can not look at the same time, Taiwan 2, that is, picture-in-picture can not be!
TV is not the reason

at the same time watching TV and dvd you certainly will not do so, you look at the brochure, there is no picture-in-picture is also what is called liquid crystal ah? may be broken some support for LCD TV Play games or watch DVD with picture-in-picture television programs, television programs do not support among the so-called picture-in-picture picture-in-picture means you are watching TV at the same time can also look at DVD, it does not mean that the two can be viewed at the same time Different television programs.On the market today are talking like this.