Chroma keying circuitry - Composite video signals - PC controlled multiple window display card;
D O I:
10.1109/30.338333
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
The development of a personal computer (PC)-controlled multiple window display card for television is described in this paper. A digital encoder card to convert the red, green and blue (RGB) signals from the PC to a composite video signal (CVBS) is designed and developed. This digital encoder card accepts the RGB analog signals from;the computer VGA display adaptor card and converts them into a PAL or NTSC format composite video signal. A chroma keying circuitry, to enable an additional video signal to be displayed with the encoded CVBS signal on a television screen in a picture-in-picture format.