update readme

README.md

@@ -29,18 +29,38 @@ dataset_info:
 ## Overview
 
 This dataset is part of **LEMAS (Large-scale Extensible Multilingual Audio Suite)**.
-It contains train and eval subsets for 10 languages with
-word-level alignment.
+It contains a large-scale training set (150k+ hours) and a curated evaluation set
+(100 utterances per language) covering 10 languages, all with word-level alignment.
 
 
 ## Fields
-
-- `audio`: relative path to MP3 audio file
-- `dur`: duration in seconds
-- `text`: original transcription
+- `key`: unique utterance identifier; the first two characters indicate the language ID
+- `audio`: relative path to the MP3 audio file
+- `dur`: audio duration in seconds
+- `txt`: original transcription
 - `align.txt`: normalized text used for alignment
-- `align.words`: list of word-level timestamps
+- `align.words`: list of word-level timestamps and confidence scores
+
+
+## Statistics
+
+### trainset
+| lang | total_dur(h) | utterances | avg_dur(s) | total_chars | avg_chars | char/sec | total_words | avg_words | word/sec |
+|------|-------------:|-----------:|-----------:|------------:|----------:|---------:|------------:|----------:|---------:|
+| it   |       6116.69 |    7209567 |      3.054 |   281128388 |    38.994 |  12.7669 |    48859270 |     6.777 |   2.2188 |
+| fr   |       6535.94 |    7557428 |      3.113 |   344633332 |    45.602 |  14.6469 |    65843169 |     8.712 |   2.7983 |
+| vi   |       6600.07 |    6426292 |      3.697 |   387621747 |    60.318 |  16.3139 |    89903814 |    13.990 |   3.7838 |
+| pt   |       7384.42 |    8682442 |      3.062 |   339417251 |    39.092 |  12.7678 |    60316112 |     6.947 |   2.2689 |
+| de   |       9842.14 |   11003833 |      3.220 |   487581808 |    44.310 |  13.7612 |    80119609 |     7.281 |   2.2612 |
+| id   |      11246.27 |   11659550 |      3.472 |   543857918 |    46.645 |  13.4331 |    85967394 |     7.373 |   2.1234 |
+| es   |      21224.55 |   26407271 |      2.893 |  1011116926 |    38.289 |  13.2331 |   183673862 |     6.955 |   2.4038 |
+| ru   |      22919.31 |   27474400 |      3.003 |   991530233 |    36.089 |  12.0172 |   163018329 |     5.933 |   1.9758 |
+| en   |      25347.90 |    9515267 |      9.590 |  1419864294 |   149.220 |  15.5597 |   268676221 |    28.236 |   2.9443 |
+| zh   |      32919.28 |   17776663 |      6.667 |  2474249286 |   139.185 |  20.8781 |   496957308 |    27.956 |   4.1934 |
+
+Words and chars statistics are computed based on the normalized alignment text (`align.txt`).
 
 ## Notes
 
-- The training set is currently being uploaded, and the `eval` set is not the final version. We will complete the update soon.
+- The `eval` set is not the final version. We will complete further updates and release a technical report in a future update.
+