Methods and apparatus to measure exposure to streaming media

1. An apparatus comprising:

a communication interface to receive metering data from a media monitor, the metering data including a first subset of a series of metadata tags extracted from media played on a presentation device, the first subset including a first metadata tag extracted proximate in time to a media event associated with the media, the metering data omitting a second subset of the series of metadata tags extracted from the media by the media monitor, the second subset of the series of metadata tags identified for omission based on a temporal proximity of the metadata tags in the second subset to the media event, each of the metadata tags in the series of metadata tags embedded in a different portion of the media, the media monitor extracting each of the metadata tags from the media when the corresponding different portion of the media is played; and

an analyzer to analyze the metering data to determine a first exposure of an audience of the presentation device to the media, the first exposure being the same as a second exposure determined based on an analysis of all tags in the series of metadata tags, at least one of the communication interface or the analyzer implemented by a processor executing instructions stored in a memory.

2. The apparatus of claim 1 , wherein the first subset includes a second metadata tag extracted after the first metadata tag, the analyzer to determine the media event occurred between the extraction of the first and second metadata tags if a first media identifier of the first metadata tag is different than a second media identifier of the second metadata tag, the media event corresponding to an ending of first media associated with the first metadata tag and a beginning of second media associated with the second metadata tag.

3. The apparatus of claim 1 , wherein the media event corresponds to a change from the presentation device accessing a first uniform resource locator to accessing a second uniform resource locator, the media corresponding to first media associated with the first uniform resource locator and second media associated with the second uniform resource locator.

4. The apparatus of claim 3 , wherein the analyzer is to associate the first metadata tag with a beginning of the first exposure of the audience to the second media if the first metadata tag was extracted after the media event.

5. The apparatus of claim 3 , wherein the analyzer is to associate the first metadata tag with an ending of the first exposure of the audience to the first media if the first metadata tag was extracted before the media event.

6. The apparatus of claim 1 , wherein the first metadata tag corresponds to a last tag extracted in the series of metadata tags before the media event, a second metadata tag in the second subset corresponding to a tag extracted last in time before the first metadata tag.

7. The apparatus of claim 1 , wherein the first metadata tag corresponds to a tag in the series of metadata tags extracted first in time after the media event, a second metadata tag in the second subset corresponding to a tag extracted first in time after the first metadata tag.

8. The apparatus of claim 1 , wherein the media is associated with a first uniform resource locator accessed by the presentation device.

9. The apparatus of claim 8 , wherein the media is first media, the media event corresponds to a change from a second uniform resource locator accessed by the presentation device to the first uniform resource locator, the second uniform resource locator associated with second media different than the first media associated with the first uniform resource locator.

10. The apparatus of claim 9 , wherein the first subset includes a second metadata tag associated with the second media, the first metadata tag and the second metadata tag indicative of an ending of the second media associated with the second uniform resource locator and a beginning of the first media associated with the first uniform resource locator.

11. The apparatus of claim 10 , wherein the second metadata tag is a metadata tag extracted last in time before the change from the second uniform resource locator to the first uniform resource locator, and the first metadata tag is a first tag extracted after the change from the second uniform resource locator to the first uniform resource locator.

12. The apparatus of claim 1 , wherein the first subset includes additional metadata tags other than the first metadata tag, adjacent ones of the additional metadata tags separated by at least one of a threshold number of intermediate metadata tags in the second subset of the series of metadata tags or a threshold amount of time.

13. A method comprising:

accessing metering data collected by a media monitor monitoring a presentation device, the metering data including a first tag selected from a series of tags extracted, by the media monitor, from media played on the presentation device, the first tag extracted from the media proximate in time to an event associated with the media playing on the presentation device, the metering data omitting other tags in the series of tags extracted by the media monitor from the media, the other tags in the series of tags identified for omission based on a temporal proximity of the other tags to the event, each of the first tag and the other tags embedded in a different portion of the media, the media monitor extracting each of the first tag and the other tags from the media when the corresponding different portion of the media is played; and

analyzing, via a processor executing instructions stored in a memory, the metering data to determine a first exposure of an audience of the presentation device to the media, the first exposure being the same as a second exposure determined based on an analysis of all tags in the series of tags.

14. The method of claim 13 , wherein the metering data includes a second tag selected from the series, the method further including:

comparing a first identifier in the first tag with a second identifier in the second tag, the first and second identifiers identifying the media associated with the first and second tags; and

determining whether the event occurred between the first and second tags.

15. The method of claim 13 , wherein the event corresponds to a change from the presentation device accessing a first uniform resource locator to the presentation device accessing a second uniform resource locator, the media corresponding to first media associated with the first uniform resource locator and second media associated with the second uniform resource locator.

16. The method of claim 13 , wherein the metering data includes additional tags selected from the series of tags, adjacent ones of the additional tags separated in the series of tags by at least one of the other tags omitted from the metering data.

17. A non-transitory computer readable medium comprising instructions that, when executed, cause a machine to at least:

access metering data collected from a media monitor, the metering data including first and second metadata tags selected from a series of metadata tags extracted, by the media monitor, from media played on a presentation device, the first metadata tag extracted from the media proximate in time to when the media began playing in response to the presentation device accessing a first uniform resource locator, the second metadata tag extracted from the media proximate in time to an event associated with the media, the metering data excluding intermediate metadata tags in the series of metadata tags extracted by the media monitor between the first metadata tag and the second metadata tag, the intermediate metadata tags identified for exclusion based on a temporal proximity of the intermediate metadata tags to the event, each of the metadata tags in the series of metadata tags embedded in a different portion of the media, the media monitor extracting each of the metadata tags from the media when the corresponding different portion of the media is played; and

analyze the metering data to determine a first exposure of an audience of the presentation device to the media, the first exposure being the same as a second exposure determined based on an analysis of all tags in the series of metadata tags.

18. The non-transitory computer readable medium of claim 17 , wherein the instructions when executed further cause the machine to:

compare a first identifier in the first tag with a second identifier in the second tag, the first and second identifiers identifying the media associated with the first and second tags; and

determine whether the event occurred between the first and second tags.

19. The non-transitory computer readable medium of claim 17 , wherein the event corresponds to a change from the presentation device accessing the first uniform resource locator to accessing a second uniform resource locator, the media corresponding to first media associated with the first uniform resource locator and second media associated with the second uniform resource locator.

20. The non-transitory computer readable medium of claim 17 , wherein the first metadata tag is a tag extracted first in time after the presentation device accesses the first uniform resource locator, and the second metadata tag is a tag extracted last in time prior to the event.