Under the terms of the deal, The Nielsen Company will apply its range of demographic data to Google TV Ads, the search giant's advertising platform for TV.
Google said that advertisers using Google TV Ads would be provided with data detailing the demographic composition of their audience within 24 hours of an ad running.
The move is part of Google's ambition to apply the detailed metrics involved in search marketing to other media, such as television.
Google launched its TV Ads platform in the US in May and employs the AdWords online interface to enable advertisers to specify budget, upload ads and pay for impressions that are delivered.
Google TV Ads is being beta-tested in the US, but has not yet been brought to the UK.
A Google spokesman said that there are no plans to launch Google TV Ads in the UK at the moment.
Google said in a statement that it will explore how to measure online and other media in partnership with Nielsen.
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