An improvement of frame erasure concealment for G.722.1 coding algorithm

摘要

This paper proposes an efficient method for frame erasure concealment in G.722.1 coding algorithm, which can mitigate the adverse impact of frame erasure on the reconstruction quality. The lost frame is reconstructed in the modulated lapped transform (MLT) domain in terms of magnitude and sign of the coefficients. The method of interpolation is employed for the magnitude estimation. Some sign information is recovered by extra information from encoder. Listening test results indicate that improved quality is produced by the proposed algorithm.