8. The system of claim 6 , wherein identifying speakers for sending the each first speech segment of the plurality of first speech segments further comprises: identifying a plurality of speakers; examining characteristics of each first speech segment; mapping the each first speech segment to a subset of the plurality of speakers based on examining the characteristics of the first speech segment; and identifying the subset of the plurality speakers as the speakers for sending the each first speech segment.
6. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: receiving a speech audio intended for transcription to textual form; dividing the received speech audio into first speech segments; identifying speakers for sending each first speech segment; sending the each first speech segment of a plurality of first speech segments to the speakers determined for a particular first speech segment; receiving second speech segments from the speakers, wherein each second speech segment of the second speech segments is a re-spoken version of a first speech segment of the first speech segments that has been generated by one of the speakers by repeating in spoken form the first speech segment that the one of the speakers has listened to; and processing the second speech segments to generate a complete transcript that is a textual representation corresponding to the received speech audio.