A drumbeat-pattern based error concealment method for music streaming applications

This paper presents a novel drumbeat-pattern based error concealment scheme, which detects the drumbeat-pattern of music signals on the encoder side and embeds the beat information as ancillary data in a preceding data unit in the compressed bitstream. The embedded beat information is then used to perform an error concealment task on the decoder side. The proposed method was implemented using an MPEG-4 AAC (Advanced Audio Coding) codec. Informal evaluations have shown that the proposed active error concealment method clearly improved the overall subjective sound quality in comparison with conventional methods if the packet losses include the drumbeats.