A father and son team of cable-TV barons convicted of fraud in 2004 aren't leaving their federal prison cells in Butner any time soon.

John Rigas, founder of Adelphia Communications, must serve his sentence of 12 years, a federal appeals court in New York ruled today. His son, Timothy Rigas, must serve 17 years.

The appeals court found the sentences were reasonable and don't "shock the conscience," Bloomberg News reported.

The court also rejected the request for a new trial from John Rigas, 84, and Timothy Rigas, 53.

Jurors had found that the Rigases lied about looting millions of dollars from Adelphia and using the money to buy land and other perks for themselves.