Profits for the New-York based company rose to $754m (£408m) from $660m a year earlier. Revenue also grew 7% to $6.8bn.
However, Viacom's radio business has languished in recent months. While overall media sales grew 11%, led by a 26% boost in ad sales at MTV, Comedy Central and Black Entertainment Television, radio revenue only increased by 2%. Radio and cable revenue accounted for 8% and 23% respectively.
Viacom's chairman and chief executive, Sumner Redstone, said: "Our television businesses continue to lead the industry in converting creative and ratings successes into strong double-digit increases in operating income and revenue.
"We also experienced strong increases in the television upfront advertising process, locking in higher rates and increased dollars, a performance which should benefit Viacom through at least the third quarter of 2005."
Redstone told analysts earlier in the quarter that the company plans to shed underperforming radio stations across its national portfolio of properties, but will retain the Infinity radio division.
The company has also confirmed that it plans to spin off its Blockbuster video rental chain in early October. In June, the company struck a deal to buy VIVA Media, the German rival to MTV.
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