Audio Packet Loss Concealment in a Combined MDCT-MDST Domain

Audio streaming applications have become very popular in recent years, owing to their low cost and convenience. However, during network congestions, data packets are often delayed or discarded, creating an annoying gap in the streamed media. This letter presents a new approach to audio packet loss concealment designed for MPEG-audio streaming applications. In a previous work, we introduced a receiver-based concealment algorithm based on applying the gapped-data amplitude and phase estimation (GAPES) interpolation algorithm in the discrete short-time Fourier transform (DSTFT) complex domain and obtained better results compared to past methods. The current approach applies the same algorithm on a different complex domain, formed from combining the modified discrete cosine transform (MDCT) domain as its real part and the modified discrete sine transform (MDST) domain as the imaginary part. The new approach significantly reduces the complexity demands while maintaining similar high-quality results.