Abstract: A video motion compensation circuit comprising a Y phase variation compensation section for inputting a macro slice address signal and a motion vector Y signal and compensating for a variation in a phase of the motion vector Y signal and a X phase variation compensation section for inputting a macro block address signal and a motion vector X signal and compensating for a variation in a phase of the motion vector X signal. The X phase variation compensation section includes four logic circuits, each having a 2-bit shifter for inputting the macro block address signal of 7 bits and outputting a 9-bit signal, a logic adder for logically combining low order 2 bits of the motion vector X signal of 5 bits to previously add 1 to a LSB of the macro block address signal, and a complement operation unit/shifter for taking a 2's complement of the motion vector X signal of 5 bits and increasing a MSB of the 2's complement-operated signal to output a 9-bit signal.

Abstract: A control handle and viewing screen assembly combines video monitor and remote steering control for a borescope steering section. A joystick or similar device controls the steering section when an inspection mode is employed. In a second or freeze-frame mode the joystick is used to move a cursor on the screen or to carry out a computation function. Steering servo motors can be positioned distally for balance.

Abstract: A camera attachment converts a standard day-light video camera into a day/night-vision video camera. The attachment device has a threaded input and output to physically and optically interconnect an auto-iris lens to a video camera. The attachment device contains an image intensifier tube and a fiber optic image conduit either of which may be switched into the through optical path to receive and either amplify or simply conduct the light image to a relay lens. The relay lens focuses the output image from either the image tube or the fiber optic image conduit onto the optical input of the video camera. The switching of the image intensifier tube or the fiber optic image conduit is dependent upon the ambient light conditions of the camera so that if there is insufficient lighting for normal daytime viewing the image tube is activated and switched into the through optical path of the camera.

Abstract: A verification and repair station for examining a printed circuit board (PCB) at a plurality of predetermined co-ordinates thereon for enabling an operator to classify suspected faults and to effect manual repair thereof if necessary. A worktable is provided for securing thereon the PCB in precise registration with an origin of the worktable and a fixed camera produces a magnified image of an illuminated area of the PCB. The co-ordinates are stored in a memory of a computer whilst a translatory drive is coupled to the worktable and to the computer for moving the worktable under control of the computer through mutually orthogonal axes so that successive co-ordinates are aligned with the camera.