WASHINGTON — President Obama defended his authorization of recently revealed domestic and international surveillance programs in comments broadcast Monday night but rejected the suggestion that his policies were basically a warmed-over version of those of the last White House.

“Some people say, ‘Well, you know, Obama was this raving liberal before. Now he’s, you know, Dick Cheney,’ ” Mr. Obama told Charlie Rose on his PBS interview show. “Dick Cheney sometimes says, ‘Yeah, you know, he took it all lock, stock and barrel.’ My concern has always been not that we shouldn’t do intelligence gathering to prevent terrorism, but rather, are we setting up a system of checks and balances?”

In perhaps his most expansive explanation of his surveillance policies since leaked documents exposed a pair of secret programs, Mr. Obama said he had made important changes from the policies of George W. Bush, including making sure that surveillance was approved by Congress and a secret foreign intelligence court. “But I think it’s fair to say that there are going to be folks on the left — and what amuses me is now folks on the right who are fine when there’s a Republican president, but now, Obama’s coming in with the black helicopters,” he said.

Yet like Mr. Cheney, who appeared on “Fox News Sunday” over the weekend, Mr. Obama defended the effectiveness of surveillance programs in heading off threats to the United States. “The one thing people should understand about all these programs, though, is they have disrupted plots, not just here in the United States but overseas as well,” he said. He added that while other factors were at work, “we are increasing our chances of preventing a catastrophe like that through these programs.”