The STC Russian speech database was recorded in 1996-1998. The main purpose of the database is to investigate individual speaker variability and to validate speaker recognition algorithms. The database was recorded through a 16-bit Vibra-16 Creative Labs sound card with an 11,025 Hz sampling rate. The database contains Russian read speech of 89 different speakers (54 male, 35 female), including 70 speakers with 15 sessions or more, 10 speakers with 10 sessions or more and 9 speakers with less than 10 sessions. The speakers were recorded in Saint-Petersburg and are within the age of 18-62. All are native speakers. The corpus consists of 5 sentences. Each speaker reads carefully but fluently each sentence 15 times on different dates over the period of 1-3 months. The corpus contains a total of 6,889 utterances and of 2 volumes, total size 700 MB uncompressed data. The signal of each utterance is stored as a separate file (approx. 126 KB). Total size of data for one speaker approximates 9,500 KB. Average utterance duration is about 5 sec. A file gives information about the speakers (speaker?s age and gender). The orthography and phonetic transcription of the corpus is given in separate files which contain the prompted sentences and their transcription in IPA. The signal files are raw files without any header, 16 bit per sample, linear, 11,025 Hz sample frequency. The recording conditions were as follows: Microphone: dynamic omnidirectional high-quality microphone, distance to mouth 5-10 cm Environment: office room Sampling rate: 11,025 Hz Resolution: 16 Bit Sound board: Creative Labs Vibra-16 Means of delivery: CD-ROM

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ELRA

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