Traditional cable-based TV providers saw their share of the pay-TV market decline in 2012 as Internet-based TV services offered by companies like Verizon (VZ) and AT&T (T) grew more popular, according to a new report. Market research firm ABI Research says that as a whole, the global pay-TV industry generated $238 billion in revenue last year. That figure is up from $223 billion in 2011 and is expected to continue growing to $304 billion in 2018. Cable companies’ share of the market dropped to 47% in 2012 from 48.5% in 2011 however, as IPTV services saw their share grow to 11.5% in 2012, up from 10% in the prior year. ABI analyst Khin Sandi Lynn notes that Verizon was the top IPTV provider in 2012 in terms of revenue.