Viacom’s MTV Networks International (MTVNI) will launch its first international high-definition service dedicated to music and kids—MTVNHD (MTV Networks High Definition). The 24-hour, English-language channel premieres on Sept. 15 and will be available in Belgium, Denmark, Finland, Norway, Poland and Sweden.

Over 300 hours of custom programming has been commissioned over two years, providing viewers with an enhanced music and kids’ entertainment experience across MTV, VH1 and Nickelodeon among other MTVNI brands.

MTVNI intends to extend the MTVNHD service to France, Germany, the Netherlands, Portugal, Spain, the U.K., Argentina, Brazil, Chile, Colombia, Mexico and Venezuela by the end of 2008.