EQUAL-INTERVAL SUBBAND ANALYZING FILTER AND SYNTHETIC FILTER FOR MPEG AUDIO MULTICHANNEL PROCESSING

摘要

PROBLEM TO BE SOLVED: To provide the equal-interval subband analyzing filter for MPEG audio multichannel processing which can analyze and filter frame samples of 5 channels in an assigned cycle at a constant operation frequency. SOLUTION: This filter consists of a window wing module 10 which starts a filtering process in response to the input of a frame start signal and which performs window wing operation for inputted frame data and a matrixing module 20 which receives the arithmetic result of the window wing module 10 and which performs matrixing operation for the frame data; and the window wing module 10 and matrixing module 20 are coupled in a pipeline shape with each other to filter 5 channels by timing division and use one filter bank by making good use of pipeline structure and timing division technique, channel by channel.