Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.

Abstract: A spool for winding an optical fiber includes flanges attached to each other using an ultrasonic fusion splicer. The spool has first and second cylindrical barrels, on which the optical fiber is wound. The flanges have a disk shape and protrude radially from the first and second cylindrical barrels so as to restrict the winding area of the optical fiber. Ultrasonic fusion splicing points form along a junction by engaging the first and second cylindrical barrels in an axial direction so as to face each other, locating a head of an ultrasonic fusion splicer on the junction and generating an ultrasonic wave from the head to the junction so as to fusion splice the first and second flanges together.

Abstract: A spool for winding an optical fiber includes flanges attached to each other using an ultrasonic fusion splicer. The spool has first and second cylindrical barrels, on which the optical fiber is wound. The flanges have a disk shape and protrude radially from the first and second cylindrical barrels so as to restrict the winding area of the optical fiber. Ultrasonic fusion splicing points form along a junction by engaging the first and second cylindrical barrels in an axial direction so as to face each other, locating a head of an ultrasonic fusion splicer on the junction and generating an ultrasonic wave from the head to the junction so as to fusion splice the first and second flanges together.

Abstract: A spool for winding an optical fiber includes flanges attached to each other using an ultrasonic fusion splicer. The spool has first and second cylindrical barrels, on which the optical fiber is wound. The flanges have a disk shape and protrude radially from the first and second cylindrical barrels so as to restrict the winding area of the optical fiber. Ultrasonic fusion splicing points form along a junction by engaging the first and second cylindrical barrels in an axial direction so as to face each other, locating a head of an ultrasonic fusion splicer on the junction and generating an ultrasonic wave from the head to the junction so as to fusion splice the first and second flanges together.

Abstract: Disclosed is a spinning device for low polarization mode dispersion. The spinning device for minimizing PMD(Polarization Mode Dispersion) of the drawn optical fiber in the optical fiber drawing process includes: a base plate arranged at a lower end of a drawing tower; a tilting spinning wheel mounted on the base plate for rotating along a first rotational shaft, for transferring a drawn optical fiber to a capstan, for periodically rotating along a second rotational shaft within a predetermined angle range at a perpendicular relation to the first rotational shaft, for applying a periodic twisting on the optical fiber using the tension of the drawn optical fiber with its outer periphery touched with the drawn optical fiber; and, a speed reducing unit connected to the second rotational shaft of the tilting spinning wheel for reducing the rotational speed of the wheel.