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README.md

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+# Dataset Card for Nexdata/Brazilian_Portuguese_Conversational_Speech_Data_by_Telephone
+
+## Description
+104 Hours - Brazilian Portuguese Conversational Speech Data by Telephone involved 118 native speakers, developed with proper balance of gender ratio, Speakers would choose a few familiar topics out of the given list and start conversations to ensure dialogues' fluency and naturalness. The recording devices are various mobile phones. The audio format is 8kHz, 8bit, u-law pcm, and all the speech data was recorded in quiet indoor environments. All the speech audio was manually transcribed with text content, the start and end time of each effective sentence, and speaker identification.
+
+For more details, please refer to the link: https://www.nexdata.ai/datasets/1313?source=Huggingface
+
+# Specifications
+## Format
+8kHz 8bit, u-law pcm, mono channel;
+## Environment
+quiet indoor environment, without echo;
+## Recording content
+dozens of topics are specified, and the speakers make dialogue under those topics while the recording is performed;
+## Demographics
+118 speakers totally, with 54% males and 46% females.
+## Annotation
+annotating for the transcription text, speaker identification and gender
+## Device
+Telephony recording system;
+## Language
+Portuguese;
+## Application scenarios
+speech recognition; voiceprint recognition;
+## Accuracy rate
+the word accuracy rate is not less than 98%
+
+# Licensing Information
+Commerical License