Abstract: A system for playing back data from a circular buffer is disclosed. The system includes: a buffer, for buffering data, wherein the data is encoded and grouped into Data Units (DUs), each containing an embedded timestamp; a buffer access module, for utilizing a write pointer to record data to the buffer, and for utilizing a read pointer to play back data from the buffer, wherein a DU pointed to by the write pointer corresponds to a current timestamp; and a computing unit, for comparing a timestamp pointed to by the read pointer with the current timestamp, and utilizing the comparison result to determine the validity of playing back data indicated by the read pointer.

Abstract: The present embodiments provide a storage device and a method of accessing the storage device. The storage device is utilized for storing a plurality of first data and a plurality of second data. Each first data correlates respectively to a second data. The storage device includes a first storage segment and a second storage segment. The first storage segment is divided into a plurality of first storage units for storing the first data. The second storage segment is divided into a plurality of second storage units for storing the second data. The size of each first storage unit is larger than the size of each second storage unit, and the size of each first data is larger than the size of its correlating second data.