1. A system for increasing accuracy of computer speech recognition comprising: a dynamic grammar builder computing device comprising one or more processing units and one or more computer-readable media comprising computer-executable instructions which, when executed by the one or more processing units, cause the dynamic grammar builder computing device to: obtain social network data occurring within a threshold timespan of a broadcast of media content; identify named entities from the obtained social network data that are trending within the obtained social network data; rank the identified named entities based upon the trending; and build a dynamic grammar comprising at least some of the named entities based upon the ranking; and a speech recognition computing device comprising one or more processing units and one or more computer-readable media comprising computer-executable instructions which, when executed by the one or more processing units, cause the speech recognition computing device to: perform speech recognition of spoken words, spoken by the broadcast of the media content, utilizing the dynamic grammar to create closed caption text for the broadcast of the media content.
1. A system for increasing accuracy of computer speech recognition comprising: a dynamic grammar builder computing device comprising one or more processing units and one or more computer-readable media comprising computer-executable instructions which, when executed by the one or more processing units, cause the dynamic grammar builder computing device to: obtain social network data occurring within a threshold timespan of a broadcast of media content; identify named entities from the obtained social network data that are trending within the obtained social network data; rank the identified named entities based upon the trending; and build a dynamic grammar comprising at least some of the named entities based upon the ranking; and a speech recognition computing device comprising one or more processing units and one or more computer-readable media comprising computer-executable instructions which, when executed by the one or more processing units, cause the speech recognition computing device to: perform speech recognition of spoken words, spoken by the broadcast of the media content, utilizing the dynamic grammar to create closed caption text for the broadcast of the media content. 3. The system of claim 1 , wherein the trending comprises occurrence metrics identifying a number of times a particular named entity is referenced in the obtained social network data within trending timespan thresholds.