What is HDMI& RCA output simultaneously?

What is HDMI& RCA output simultaneously?

For example, there are two channel signal regarding HD& SD signal input,

in general, you need two sets of video encoder to encode it,but we provide

you HDMI+ CVBS video encoder, you can input your HD& SD signal and 

output it with HD& SD ip output,it's best solution for your HD& SD signal IPTV solution

Haiwei released a range of HDMI+ RCA output encoder, divided into two

series;

1. not simutaneously output, such as

2. simultaneously output such as