| # 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. | |
| The following files provide raw lavels for the train/validation/test split | |
| * train.txt | |
| * valid.txt | |
| * test.txt | |
| Friendly metadata with the split is provided in the following files: | |
| * ljspeech_train.json | |
| * ljspeech_test.json | |
| * ljspeech_valid.json | |
| The JSON files are formatted as follows: | |
| ```json | |
| { | |
| "<sample-id>": { | |
| "char_raw": "<label text (raw)>", | |
| "char": "<label text (preprocessed)", | |
| "phn": "<experimental phoneme annotation obtained using a G2P model", | |
| "wav": "<relative path to the file" | |
| } | |
| } | |
| ``` | |
| The dataset is also usable as a HuggingFace Arrow dataset: | |
| https://huggingface.co/docs/datasets/ | |
| # FILE FORMAT | |
| Original 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 [email protected]. | |
| 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 | |
| } | |