Comcast, the nation's biggest pay-TV provider and the majority owner of NBC Universal, is expected to extend its string of strong results when it reports its first-quarter earnings.

Comcast's results have been going against the grain of the industry for a year. It's been curbing the loss of cable-TV subscribers and has increased its TV revenue even as other cable companies lose viewers to satellite and phone-company TV services.

On its last quarterly earnings conference call, executives hinted that there might be positive TV subscriber numbers this year, which would be a feat. They said the trend break would likely come after the first quarter, however.

The report comes out before the market opens Wednesday.

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