Advertisers will be able to measure the effectiveness of ads they purchase for Internet video viewing similar to the way they evaluate TV ratings, under a deal Tremor Video struck with Nielsen.

The companies said they will give customers of Tremor's VideoHub online video service access to Nielsen Online Campaign Ratings gross rating points (GRP). The move could give advertisers a quick snapshot of ads that run on both TV networks and online video sites. Nielsen says it's the first time that it has integrated GRP data with an online video advertising platform.

With more Web surfers relying on online video sites ranging from Hulu to Comcast's Fancast Xfinity TV, allowing advertisers to measure online video similar ratings used for TV could help drive more spending for online video.