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 # Video files - compressed
 *.mp4 filter=lfs diff=lfs merge=lfs -text
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+AISHELL2-Data-Specification\[EN\].docx filter=lfs diff=lfs merge=lfs -text
+AISHELL2-Data-Specification\[ZH\].docx filter=lfs diff=lfs merge=lfs -text

AISHELL-2_README.txt

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+File : README
+
+
+
+		                AISHELL-2 Speech Data
+
+			北京希尔贝壳科技有限公司
+      	            	    Beijing Shell Shell Technology Co.,Ltd
+			           03/10/2018
+
+1. AISHELL-2 Speech Data
+
+		- Sampling Rate : 	16kHz
+		- Sample Format : 	16bit
+		- Environment :		Indoor
+		- Speech Data Type : 	PCM
+		- Channel Number : 	1
+		- Recording Equipment : 	iOS
+		- Time : 	1000 hours of speech data (around 1 million utterances)
+		- Speaker : 	1991 speakers (845 male and 1146 female)
+
+
+2. 数据目录结构
+│  AISHELL2-Data-Specification .docx			                （Corpus Information）
+│  README.txt			                                              (readme）
+│  ChangeLog			                                                      	  （Change Information）
+└─ data				                          	                （Data File）
+	│├─wav.list                                                                               （Audio list）
+	│├─trans.txt                                                                             （Transcript Content）
+	│├─spk_info.txt                                                                       （Speaker Information）
+	│├─wav                                                                                     （Audio Data File）
+	│├─D2166						  （Speaker ID File）
+        	││  ││      ID2166W0001.wav			                （Audio）
+
+3. Evaluation Data:
+		Currently we open-sourced AISHELL2-2018A-EVAL
+		-  dev: 2500 utterances from 5 speaker
+		-  test: 5000 utterances from 10 speakers
+		You can download above evaluation set from: https://www.aishelltech.com/aishell_2018_eval
+
+4. RECIPE
+		Based on Kaldi standard system, AISHELL-2 provides a self-contained Mandarin ASR recipe
+		-  a word segmentation module, which is a must-have component for Chinese ASR systems
+		-  an open-sourced Mandarin lexicon(DaCiDian)
+		-  a simplified GMM training recipe
+		-  80-dim FBank without pitch as NN input feature
+		-  slightly different data augmentation setup(tempo perturbation, max-volume perturbation)
+		-  acoustic channel adaptation recipe(AM fine-tuning)
+		-  a real-time streaming ASR demo via laptop microphone (tested on MacOS)
+		You can download recipe set from: http://www.aishelltech.com/aishell_2

AISHELL2-Data-Specification[EN].docx

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+size 145528

AISHELL2-Data-Specification[ZH].docx

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+version https://git-lfs.github.com/spec/v1
+oid sha256:8c3a82459705d11350027fb791ea0387c3fe07f0ac08e04c2a6f8ca204ec72fb
+size 154677

ChangeLog

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+======================================================
+
+ 			AISHELL-2 Corpus ChangeLog
+Version :	1.0
+Date :	03/10/2018
+
+======================================================
+###	v 1.0 (03/10/2018)
+		- AISHELL-2 is by far the largest open-source speech corpus available for Mandarin ASR research.