Abstract: The present invention relates to a pharmaceutical composition comprising an adenosine derivative which can be usefully used for preventing or treating cholangitis or a liver disease caused by cholangitis, and the composition comprises a compound represented by Chemical Formula 1 or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier.

Abstract: For a digital television including an analog/digital converter for converting interlaced scanning video signals into digital video signals, a motion compensating system comprises a color/brightness signal separator for separating the signal and the brightness signal of said digital video signal from each other; a picture transition sensing stage for detecting the amount of the horizontal and time motion of the picture by said brightness signal and the amount of the vertical transistion of the picture by said digital video signal to compare and compensate the two amounts, obtaining the signal of sensing the amount of the motion of the picture; and a mixer for interpolating the color signal, the brightness signal of the color/brightness separator and compensating the interpolated color signal and the brightness signal and the present color signal and the present brightness signal with the signal of the sensed amount of motion of the picture generated by the picture transition sensing stage.

Abstract: A HDTV system compatible with NTSC is accomplished by employing two channels for transmitting data. Since the channel I has low spatial definition+high time definition and the channel II has high spatial definition+low time definition, associating the channel I with the channel II produces high spatial definition+high time definition.

Abstract: There is disclosed a device and a circuit to provide compatibility between NTSC television and HDTV by using dual channel transmission system. One embodiment may be arranged with means for generating a first display signal, a pre-filter (13) which prevents aliasing by filtering the first display signal, a first scanning converter (14), a first NTSC encoder (15), a first RF modulator (16), a delay unit (17), a first line rejecter (18), a second scanning converter (19), a first postfilter (20), a second line rejecter (21), a subtractor, a first frequency shifter (23), a signal reconstruction circuit (24), a second NTSC encoder (25), and a second RF modulator (26).