The MPEG-4 Low Delay Audio Coder (a.k.a. AAC Low Delay, or AAC-LD) is audio compression standard designed to combine the advantages of perceptual audio coding with the low delay necessary for two-way communication.
The MPEG-4 Low Delay Audio Coder (often referred to as AAC Low Delay, or AAC-LD) is a standardized method for compressing audio while maintaining acceptable quality and minimizing delay, making it suitable for applications involving two-way communication.