Abstract: Device and method for coding an audio/video signal, in which a sampling rate is shifted according to a variance of a received data during data sampling operation for improving a coding efficiency, the device including a first sample/hold unit for sampling/holding an analog video signal at a first sampling rate in response to a sampling control signal, a phase shifter for shifting a phase of the sampling control signal according to a variance of the video signal, a second sampling/hold unit for sampling/holding an analog video signal at a second sampling rate in response to the sampling control signal shifted by the phase shifter, a summer for summing the sampling data from the first sample/hold unit and the sampling data from the second sample/hold unit, a comparator for comparing the sampling data summed at the summer to an arbitrarily set critical value, a switching unit for selectively providing the sampling data either from the first sample/hold unit or from the second sample/hold unit in response to a si

Abstract: A data synchronizing apparatus and method thereof capable of readily synchronizing video data and audio data by using a read pointer and a write pointer in each memory device storing the video and the audio data, includes a host processor for extracting video data, an information value indicating a start time of video data display and a system clock signal, and storing the extracted video data at a first data storing unit; and a video encoder for controlling a decoding speed of the video data read from a second data storing unit in accordance with a read pointer value of the second data storing unit when reading and decoding a write pointer value of the second data storing unit indicating an area where the extracted video data is to be stored and a video data previously stored at the second data storing unit.