9. A system for audience measurement, comprising: a capture device, comprising a video input, a closed captioning decoder connected to the video input, and a first network interface for transmitting a first identification of closed captioning data received by the capture device during playback of an item of content to an audience measurement server; and an audience measurement server comprising a processor executing a measurement engine, and a second network interface for receiving the identification of closed captioning data; wherein the measurement engine is configured for: matching the first identification of closed captioning data received by the capture device to a second identification of closed captioning data stored in a database in a storage device of the audience measurement server, retrieving an identification of the item of content associated in the database with the second identification of closed captioning data, responsive to the match, associating a device identifier of the capture device with an audience list of the identified item of content, receiving, from the capture device, a third identification of closed captioning data received by the remote device during playback of the item of content, matching the third identification of closed captioning data received by the capture device to a fourth identification of closed captioning data stored in the database, retrieving the identification of the item of content associated in the database with the fourth identification of closed captioning data, responsive to the match, determining that the device identifier of the capture device is included in an audience list of the identified item of content, increasing a value of a confidence metric associated with the device identifier of the capture device in the audience list of the identified item of content, and incrementing an audience measurement counter for the item of content for each device identifier included in the audience list of the identified item of content having a confidence metric value greater than a threshold.
9. A system for audience measurement, comprising: a capture device, comprising a video input, a closed captioning decoder connected to the video input, and a first network interface for transmitting a first identification of closed captioning data received by the capture device during playback of an item of content to an audience measurement server; and an audience measurement server comprising a processor executing a measurement engine, and a second network interface for receiving the identification of closed captioning data; wherein the measurement engine is configured for: matching the first identification of closed captioning data received by the capture device to a second identification of closed captioning data stored in a database in a storage device of the audience measurement server, retrieving an identification of the item of content associated in the database with the second identification of closed captioning data, responsive to the match, associating a device identifier of the capture device with an audience list of the identified item of content, receiving, from the capture device, a third identification of closed captioning data received by the remote device during playback of the item of content, matching the third identification of closed captioning data received by the capture device to a fourth identification of closed captioning data stored in the database, retrieving the identification of the item of content associated in the database with the fourth identification of closed captioning data, responsive to the match, determining that the device identifier of the capture device is included in an audience list of the identified item of content, increasing a value of a confidence metric associated with the device identifier of the capture device in the audience list of the identified item of content, and incrementing an audience measurement counter for the item of content for each device identifier included in the audience list of the identified item of content having a confidence metric value greater than a threshold. 10. The system of claim 9 , wherein the measurement engine is further configured for adding a device identifier of the capture device to an audience list of the identified item of content.