Abstract: The present invention relates to a pulsation reduction apparatus of a hydraulic piston pump, comprising: a block housing that has one end connected to the first hydraulic circuit and the other end connected to the second hydraulic circuit; a damper that is embedded in the block housing, absorbs pressure resulting from working fluid introduced to the first hydraulic circuit, assists with pressure increase of the second hydraulic circuit, and allows shape deformation; and viscosity damping units that are embedded in the block housing, are arranged between the first hydraulic circuit and the damper and between the second hydraulic circuit and the damper, and reduce viscosity of the working fluid introduced from the first and second hydraulic circuits, thereby reducing pressure pulsation and stably performing shock absorption and pressure increase at the same time with a relatively simple configuration.

Abstract: The present invention relates to a pulsation reduction apparatus of a hydraulic piston pump, comprising: a block housing that has one end connected to the first hydraulic circuit and the other end connected to the second hydraulic circuit; a damper that is embedded in the block housing, absorbs pressure resulting from working fluid introduced to the first hydraulic circuit, assists with pressure increase of the second hydraulic circuit, and allows shape deformation; and viscosity damping units that are embedded in the block housing, are arranged between the first hydraulic circuit and the damper and between the second hydraulic circuit and the damper, and reduce viscosity of the working fluid introduced from the first and second hydraulic circuits, thereby reducing pressure pulsation and stably performing shock absorption and pressure increase at the same time with a relatively simple configuration.

Abstract: A method and apparatus are provided for transmitting dummy video sync and audio signals in an optical disc player, which are capable of generating a dummy video sync signal when the optical disc player plays an audio-only optical disc. The method and apparatus transmit to a television the dummy video sync signal along with an audio signal read/reproduced from the optical disc. Accordingly, the invention prevents the television from being automatically turned off or switched to an audio mute state when only audio signals are reproduced from the disc without any reproduction of associated video signals. As a result, the user can hear audio sound through speakers equipped in the television even though only audio signals are reproduced from the disc.

Abstract: A method and apparatus are provided for transmitting dummy video sync and audio signals in an optical disc player, which are capable of generating a dummy video sync signal when the optical disc player plays an audio-only optical disc. The method and apparatus transmit to a television the dummy video sync signal along with an audio signal read/reproduced from the optical disc. Accordingly, the invention prevents the television from being automatically turned off or switched to an audio mute state when only audio signals are reproduced from the disc without any reproduction of associated video signals. As a result, the user can hear audio sound through speakers equipped in the television even though only audio signals are reproduced from the disc.