Comcast Corp. reported an 8 percent increase in second-quarter profit Wednesday, a solid performance in the face of a seasonally slower quarter made tougher by a decelerating economy.

While the nation’s largest cable operator lost basic-video subscribers in the quarter, such losses were in line or better than what analysts had expected.

Philadelphia-based Comcast posted second-quarter net income of $632 million, or 21 cents per share, compared with $588 million, or 19 cents per share, in the quarter a year earlier.