Abstract: Disclosed is a deinterleaving system for receiving digital transmission data which is interleaved in units of a block and deinterleaving the received data. A sync signal is detected from the interleaved sync data which is included in the data of the received data block, and the deinterleaving is performed according to the detected sync data. In such a deinterleaving system, the transmission apparatus does not need to add a predetermined sync data to the interleaved source data when the data is transmitted, and the received data can be restored into the original data which was maintained prior to being interleaved.

Abstract: An image signal processing system such as a television, a video tape recorder, a video disk player, a digital camera and the like, more particularly to an impulse noise reduction method and circuit which can reduce impulse noise component effectively in the image signal without damage of the original input image signal by using the noise characteristic in which has no vertical correlation and of which frequency component has 2 MHz or more in a horizontal direction at least.