Mobile and Media Giants: What to Expect in Earnings Wednesday

All eyes are on Comcast, Facebook, Viacom and Yelp.

For Comcast, which reports before the opening bell Wednesday, the Street is estimating a 3 percent increase in its quarterly revenue to $15.4 billion, and quarterly earnings of 50 cents a share. Shares of Comcast are up better than 10 percent year to date.

Viacom's earnings are on deck Wednesday morning, before the market opens. According to Thomson Analytics, analysts are looking for a contraction in quarterly revenue and earnings growth (year over year). However, Matthew Harrigan at Wunderlich Securities says the 3-D version of "Star Trek" may generate strong interest overseas, and that could be a catalyst for future earnings.

AP

Facebook will report earnings on Wednesday after the market closes. As more consumers use their mobile phone to access the Internet, analysts will be looking to see if the social networking site is continuing to find ways to monetize mobile. For Facebook, the Street is looking for a quarterly revenue of $1.4 billion, and earnings per share of 13 cents. Keep in mind shares of Facebook, while up roughly 28 percent over the past six months, are still trading well below its IPO price of $38.

Yelp reports quarterly earnings on Wednesday after the bell. Similar to Facebook, analysts will look for more clarity around Yelp's mobile strategy—and how the company is planning to strengthen its international presence—specifically in Europe. In terms of numbers, the Street is looking for a first quarter revenue of $45 million, which would be 63 percent higher than what was reported the same quarter last year. This quarter, analysts are expecting a loss of 6 cents a share.

Disclosure: Comcast is the owner of NBC Universal, the parent company of CNBC and CNBC.com.

_By CNBC's Seema Mody. Follow Seema Mody on Twitter @SeemaCNBC.