Patent ID: 7623767
Filing Date: 2009-11-24
Classification: H03M,Y10S

Abstract:
1. An apparatus for real time data compression applied for a data recorder, the apparatus comprising: a processing unit for performing a data compressing process; an interface unit connected to the processing unit through an interface, adapted to connect to a measuring device to receive measured analog signals from the measuring device, and further including a storing unit connected to the processing unit through data/address bus for storing the compressed data according to a data format; wherein the data compressing process performed by the processing unit comprises steps of: setting the first data point as a starting point X sequentially examining the plurality of the data points to determine whether every present data point X recording the previous data point X wherein when the data points vary quickly during a period and the amount of the continuously examined data points is less than a second predetermined amount, the total amount of the data points that exceed their respective predetermined tolerable error ranges and the value of each of these data point are recorded; wherein the data format for the recorded data points has: a main region composed of multiple segments, wherein each segment has a predetermined length and stores a secondary region recording a start time that the data points are initially recorded, a sampling interval time and multiple blocks, wherein each block corresponds to several segments in the main region and includes a time value and a position value respectively representing a start time of the block and the start position of the block.