Device and method for decoding digital video data

Abstract

A device for decoding digital video data including a variable length decoder (VLD), an inverse discrete cosine transform (DCT) converting part, a movement compensating part, and a first storage device for repeated production of first video frame data responsive to a control signal display format. A second storage device is also employed for reordering and storing second video frame data produced by adding the data from the inverse DCT converting part and the movement compensating part repeatedly and repeated production of stored data in response to a control signal produced according to the display format. A switching device is further included that selectively produces the second video frame data, composed of reordered and repeated production of the first video frame data in response to a selection control signal and a controlling device provides control signals and display format information. A converting data device converts data to a picture size, employing interlaced to progressive or progressive to interlaced conversion, for producing frame data matched to the display format, the data having a frame rate thereof converted in the switching device in response to the format information from the controlling device and a synchronizing signal.