Introduction

Czech Broadcast News Speech contains audio recordings collected from three Czech radio stations (Cesky rozhlas 1 Radiozurnal - CRo1, Cesky rozhlas 2 Praha - CRo2, Cesky rozhlas 3 Vltava - CRo3) and two TV channels (Ceska televize - CTV and Prima TV - Prima). The audio was recorded between February 1 and April 22, 2000, at the Department of Cybernetics, University of West Bohemia in Pilsen.

The corpus was created to support the development of large vocabulary speaker independent speech recognition systems for Czech.

Data

There are 286 audio files, totaling approximately 50 hours of broadcast news. The news do not contain weather forecasts, sports news, or traffic announcements. The audio files are single-channel, 22.05 kHz, 16 bit linear wav files. The stations, channels, number of files and number of hours are listed below:

Radio

Source	Files	Hours
CRo1	138	30.8
CRo2	90	7.8
CRo3	14	2

TV

Source	Files	Hours
CTV	22	5.1
Prima	22	4.2

The corresponding transcripts are available as Czech Broadcast News Transcripts. The transcripts were created by native Czech speakers working at the Department of Cybernetics, University of West Bohemia in Pilsen, under the direction of Vlasta Radova. The transcription was done using software provided by the LDC (Transcriber 1.4.1). Those parts of the audio recordings that do not contain speech or where the signal was disrupted were not transcribed. As a consequence, the corpus contains about 23 hours of transcribed speech. The transcriptions are provided in both the ISO-8859-2 and Windows-1250 character set. For an example transcript please click on this example.

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