According to IHS (NYSE:IHS), telco IPTV was the only segment of the U.S. pay TV market to achieve growth in the second quarter this year. The U.S. IPTV providers - represented by AT&T Uverse, Verizon FiOS and others - boasted a net addition of 398,000 during the April to June period, up from 304,000 in the second quarter of 2012. During the same period, the U.S. pay TV market as a whole shed 352,000 subscribers.The main component of the pay TV market's decline was the cable segment's loss of 588,000 subscribers, slightly better than the 598,000 customers that cable shed during the same time last year. Meanwhile, satellite's decline widened to 162,000 subscribers, up from 62,000 a year ago.Based on the number of total subscribers at the end of the second quarter, cable had 55% of the U.S. pay TV market, satellite held 34% and telco IPTV had 11%.