| |
| The LJ Speech Dataset |
|
|
| Version 1.0 |
| July 5, 2017 |
| https://keithito.com/LJ-Speech-Dataset |
| |
|
|
|
|
| OVERVIEW |
|
|
| This is a public domain speech dataset consisting of 13,100 short audio clips |
| of a single speaker reading passages from 7 non-fiction books. A transcription |
| is provided for each clip. Clips vary in length from 1 to 10 seconds and have |
| a total length of approximately 24 hours. |
|
|
| The texts were published between 1884 and 1964, and are in the public domain. |
| The audio was recorded in 2016-17 by the LibriVox project and is also in the |
| public domain. |
|
|
|
|
|
|
| FILE FORMAT |
|
|
| Metadata is provided in metadata.csv. This file consists of one record per |
| line, delimited by the pipe character (0x7c). The fields are: |
|
|
| 1. ID: this is the name of the corresponding .wav file |
| 2. Transcription: words spoken by the reader (UTF-8) |
| 3. Normalized Transcription: transcription with numbers, ordinals, and |
| monetary units expanded into full words (UTF-8). |
|
|
| Each audio file is a single-channel 16-bit PCM WAV with a sample rate of |
| 22050 Hz. |
|
|
|
|
|
|
| STATISTICS |
|
|
| Total Clips 13,100 |
| Total Words 225,715 |
| Total Characters 1,308,674 |
| Total Duration 23:55:17 |
| Mean Clip Duration 6.57 sec |
| Min Clip Duration 1.11 sec |
| Max Clip Duration 10.10 sec |
| Mean Words per Clip 17.23 |
| Distinct Words 13,821 |
|
|
|
|
|
|
| MISCELLANEOUS |
|
|
| The audio clips range in length from approximately 1 second to 10 seconds. |
| They were segmented automatically based on silences in the recording. Clip |
| boundaries generally align with sentence or clause boundaries, but not always. |
|
|
| The text was matched to the audio manually, and a QA pass was done to ensure |
| that the text accurately matched the words spoken in the audio. |
|
|
| The original LibriVox recordings were distributed as 128 kbps MP3 files. As a |
| result, they may contain artifacts introduced by the MP3 encoding. |
|
|
| The following abbreviations appear in the text. They may be expanded as |
| follows: |
|
|
| Abbreviation Expansion |
| |
| Mr. Mister |
| Mrs. Misess (*) |
| Dr. Doctor |
| No. Number |
| St. Saint |
| Co. Company |
| Jr. Junior |
| Maj. Major |
| Gen. General |
| Drs. Doctors |
| Rev. Reverend |
| Lt. Lieutenant |
| Hon. Honorable |
| Sgt. Sergeant |
| Capt. Captain |
| Esq. Esquire |
| Ltd. Limited |
| Col. Colonel |
| Ft. Fort |
|
|
| * there's no standard expansion of "Mrs." |
| |
| |
| 19 of the transcriptions contain non-ASCII characters (for example, LJ016-0257 |
| contains "raison d'être"). |
| |
| For more information or to report errors, please email kito@kito.us. |
| |
| |
| |
| LICENSE |
| |
| This dataset is in the public domain in the USA (and likely other countries as |
| well). There are no restrictions on its use. For more information, please see: |
| https://librivox.org/pages/public-domain. |
| |
| |
| CHANGELOG |
| |
| * 1.0 (July 8, 2017): |
| Initial release |
| |
| * 1.1 (Feb 19, 2018): |
| Version 1.0 included 30 .wav files with no corresponding annotations in |
| metadata.csv. These have been removed in version 1.1. Thanks to Rafael Valle |
| for spotting this. |
| |
| |
| CREDITS |
| |
| This dataset consists of excerpts from the following works: |
| |
| * Morris, William, et al. Arts and Crafts Essays. 1893. |
| * Griffiths, Arthur. The Chronicles of Newgate, Vol. 2. 1884. |
| * Roosevelt, Franklin D. The Fireside Chats of Franklin Delano Roosevelt. |
| 1933-42. |
| * Harland, Marion. Marion Harland's Cookery for Beginners. 1893. |
| * Rolt-Wheeler, Francis. The Science - History of the Universe, Vol. 5: |
| Biology. 1910. |
| * Banks, Edgar J. The Seven Wonders of the Ancient World. 1916. |
| * President's Commission on the Assassination of President Kennedy. Report |
| of the President's Commission on the Assassination of President Kennedy. |
| 1964. |
| |
| Recordings by Linda Johnson. Alignment and annotation by Keith Ito. All text, |
| audio, and annotations are in the public domain. |
| |
| There's no requirement to cite this work, but if you'd like to do so, you can |
| link to: https://keithito.com/LJ-Speech-Dataset |
| |
| or use the following: |
| @misc{ljspeech17, |
| author = {Keith Ito}, |
| title = {The LJ Speech Dataset}, |
| howpublished = {\url{https://keithito.com/LJ-Speech-Dataset/}}, |
| year = 2017 |
| } |
| |
