Abstract
The ORAL corpus is a corpus containing the transcribed recordings of predominantly informal conversations taking place between native speakers of Czech from all regions of the Czech Republic. The speakers knew each other very well (they were either friends or family members) and they were recorded in their natural environment.
The recordings were made over the course of ten years, between 2002 and 2011. The corpus is not balanced, with the majority of the data originating from the Bohemia region of the Czech Republic (for more visit the corpus structure; Czech only).
There is only one level of transcription, and wherever it was possible, it was unified along with tokenization for all parts of the corpus. The ORAL corpus unifies the corpora ORAL2006, ORAL2008, ORAL2013 and the as yet unpublished recordings ORAL-Z.
The overall size of the corpus is 5 368 391 words, with a total recording time of 582 hours. Part of the transcripts are not linked to the audio (data from the corpora ORAL2006 and ORAL2008).
The corpus is lemmatized and morphologically tagged. It uses the same type of morphological tagging as the contemporary written corpora.