"Jersey Shore was a game-changing hit for TV but it also precipitated an overemphasis on one night," he said. "We're now successfully building out additional nights."
Viacom, which is based in New York, took an after-tax charge of $379 million in the 2011 quarter to cover an arbitration award won by the original shareholders of Harmonix.
Viacom had acquired Harmonix in 2006, but sold it back to its founders in 2010. The founders then sued, claiming that they were owed extra payments for the performance of "Rock Band" during its spell of popularity. They won an arbitration award of $383 million. Viacom is appealing the award, but has set aside the money.
Viacom's more heavily traded class of stock, Class B, rose $1.02, or 1.7 percent, to close at $60.35 Thursday. It rose as high as $60.84 earlier in the session. That was an all-time high, according to FactSet. Viacom's stock began trading in its current form in late 2005, just before CBS Corp. separated into a separate company.