alibabasglab/LJSpeech-1.1-48kHz

LJSpeech-1.1 High-Resolution Dataset (48,000 Hz)

The LJSpeech-1.1 dataset, widely recognized for its utility in text-to-speech (TTS) and other speech processing tasks, has now been enhanced through a cutting-edge speech super-resolution algorithm. The original dataset, which featured a sampling rate of 22,050 Hz, has been upscaled to 48,000 Hz using ClearerVoice-Studio, providing a high-fidelity version suitable for advanced audio processing tasks.

Key Features

• High-Resolution Audio: The dataset now offers audio files at a sampling rate of 48,000 Hz, delivering enhanced perceptual quality with richer high-frequency details.

• Original Content Integrity: The original linguistic content and annotation structure remain unchanged, ensuring compatibility with existing workflows.

• Broader Application Scope: Suitable for professional-grade audio synthesis, TTS systems, and other high-quality audio applications.

• Open Source: Freely available for academic and research purposes, fostering innovation in the speech and audio domains.

Original Dataset

• Source: The original LJSpeech-1.1 dataset contains 13,100 audio clips of a single female speaker reading passages from public domain books.

• Duration: Approximately 24 hours of speech data.

• Annotations: Each audio clip is paired with a corresponding text transcript.

Super-Resolution Processing

The original 22,050 Hz audio recordings were processed using a state-of-the-art MossFormer2-based speech super-resolution model. This model employs:

• Advanced Neural Architectures: A combination of transformer-based sequence modeling and convolutional networks.

• Perceptual Optimization: Loss functions designed to preserve the naturalness and clarity of speech.

• High-Frequency Reconstruction: Algorithms specifically tuned to recover lost high-frequency components, ensuring smooth and artifact-free enhancement.

Output Format

• Sampling Rate: 48,000 Hz

• Audio Format: WAV

• Bit Depth: 16-bit

• Channel Configuration: Mono

Use Cases

1. Text-to-Speech (TTS) Synthesis ○ Train high-fidelity TTS systems capable of generating human-like speech. ○ Enable expressive and emotionally nuanced TTS outputs.

2. Speech Super-Resolution Benchmarking ○ Serve as a reference dataset for evaluating speech super-resolution algorithms. ○ Provide a standardized benchmark for perceptual quality metrics.

3. Audio Enhancement and Restoration ○ Restore low-resolution or degraded speech signals for professional applications. ○ Create high-quality voiceovers and narration for multimedia projects.

File Structure

The dataset retains the original LJSpeech-1.1 structure, ensuring ease of use:

LJSpeech-1.1-48kHz/
├── metadata.csv         # Text transcriptions and audio file mappings
├── wavs/               # Directory containing 48,000 Hz WAV files
└── LICENSE.txt         # License information

Licensing

The LJSpeech-1.1 High-Resolution Dataset is released under the same open license as the original LJSpeech-1.1 dataset (https://keithito.com/LJ-Speech-Dataset/). Users are free to use, modify, and share the dataset for academic and non-commercial purposes, provided proper attribution is given.