Abstract: A tab coefficient updating device of an FIRADF capable of greatly reducing the amount of hardware therefor and integrating its tab coefficient updating value operating circuit using a simple circuit design. The tab coefficient updating device includes a finite impulse-responding adaptive digital filter unit for filtering an input signal using a tab coefficient updated for a predetermined one of all tabs by a tab coefficient signal and a tab address signal, and a tab address generating unit for generating the tab address signal associated with the predetermined tab of the finite impulse-responding adaptive digital filter unit and applying the generated tab address signal to a tab coefficient updating value operating unit as well as the finite impulse-responding adaptive digital filter unit.

Abstract: Motion vector decoding apparatus and method for converting a variable length of a motion vector into an original one using a difference component of the motion vector. The motion vector decoding apparatus comprises an X-axis motion vector component decoder for decoding an X-axis component of the motion vector in response to first and second X-axis motion vector difference components, and a Y-axis motion vector component decoder for decoding a Y-axis component of the motion vector in response to first and second Y-axis motion vector difference components. According to the present invention, a compressed video signal can be restored rapidly and accurately in a variable length decoder.

Abstract: A distributor of high-definition television is disclosed that processes inputted serial data as parallel, 24 bit data. During the processing, header data from a central buffer is removed, and a point of time for reading out data from the central buffer is controlled as a starting bit, resulting in prevention of errors and stable data processing..