Comcast, the countryÔÇÖs biggest cable TV operator, reported a jump in second-quarter profits of 53 percent, it said yesterday. The Phildelphia-based firm said that profits were boosted by higher prices and increased spending by consumers on internet and video services such as HD packages. The company said it focused its marketing efforts on attracting new cable television customers in the run-up to the digital transition on June 12. Lower capital investment and cost controls also contributed towards the better results,┬áComcast said.