Wall Street Journal: Comcast has agreed to acquire the TV ad-targeting firm Visible World. The deal could put the cable giant into a stronger position in the data-driven TV advertising business, which is still in its infancy. New York-based Visible World works with marketers to deliver ads to specific audiences and households based on zip codes, using data from cable set top boxes and other sources. It also has a division that that allows marketers to use software to buy TV ads in an automated fashion as they do when they buy online ads.