Update README.md

README.md

@@ -49,7 +49,7 @@ In this STVi dataset, we split the origin audio into 1-15s corresponding to each
 
 The speech material has been subdivided into portions for train and test.
 
-Speech was recorded in a quiet environment with high quality microphone, speakers were asked to read one sentence at a time.
+The speech was split from a TED Talk, and each speech segment corresponds to a transcript sentence.
 
 |                     | Train | Test  |
 | ------------------- | ----- | ----- |