High frequency residue replication for audio compression

High Frequency Residue Replication (HFRR) method for audio signal (including wideband speech) compression is introduced. The HFRR method takes the frequency domain audio signal as an input, processes it with frequency domain perceptual filter and gets the frequency residue; then the residue is divided into low frequency and high frequency parts; the high frequency residue can be represented by a small amount of parametric data in compression process and reconstructed in synthesis process by HFRR method. Study results have shown that HFRR is a high efficient audio compression method with good quality, therefore it can be widely used in different low bit rates and high quality audio compression and coding schemes.