Car radio's turn off(press) and on(release) when brake

i have some problem nowadays during pressing break that time, my radio will shut off for about one second and switch on back again, all lights and headlamp will dim out and light back a while as well. i wonder what problem i've occur. probably what is going on, anyone can tell?

Will it helps if i install VS and Grounding cable? or something cut lose inside?i've never touch anything before. if my negative terminal of the battery...