Patent ID: 6570945
Filing Date: 2003-05-27
Classification: G11B,H04J,H04L

Abstract:
A reception interface unit in a transmission system wherein time series data is divided into data groups and a data packet including reproduction specification time data specifying a time at which each data piece in the data groups should be reproduced, added to the data groups is transmitted on a transmission bus in a time division manner, said reception interface unit comprising:a cycle timer for counting a reference time of a home device based on a reference time on the transmission bus; reproduction specification time data extraction means for extracting the reproduction specification time data in the data groups from a signal received via the transmission bus and storing the reproduction specification time data in a buffer; a reception buffer for inputting and storing the data pieces in the data groups in order and reading out the data pieces in the storage order in response to a reproduction clock; a match detection means for generating a reference clock pulse if the reference time of the home device matches the reproduction specification time; and a PLL circuit being responsive to the reference clock pulse for generating a clock signal which is phase synchronized with the reference clock pulse as the reproduction clock; wherein when the reference time on the transmission bus changes, the data stored in the buffer in said reproduction specification time data extraction means and the data stored in said reception buffer are all deleted.