Bandwidth Extension

Bandwidth extension aims to enhance the quality of low-bandwidth audio signals by reconstructing missing high-frequency components. Current research heavily utilizes deep learning, particularly generative adversarial networks (GANs) and convolutional neural networks (CNNs), often employing dual-stream architectures to separately process amplitude and phase information for improved accuracy and efficiency. This field is significant for improving the quality of speech and music in various applications, including telephony, speech recognition, and audio restoration, with recent advancements focusing on real-time processing and adaptability to varying input bandwidths.