Abstract: A video noise reduction system for incoming video information from a plurality of picture points. A first processor is capable of synthesizing each picture point from incoming picture point information from adjacent picture points to provide noise reduced picture information. A store is provided for storing picture information from at least one frame and a second processor is capable of synthesizing each picture point from incoming and stored information from a corresponding picture point from a current and earlier frames to effect noise reduction. A detector is provided to detect any movement between pictures to allow processing by the first processor when movement is occuring and from the second processor when no movement is occuring. A third processor may be provided to allow synthesizing from adjacent picture points from current and earlier pictures to effect noise reduction when the picture content is detected to be stationary and has only low frequency components therein.

Abstract: A T.V. picture freeze system capable of capturing a video frame comprising first and second fields. Movement is detected between fields for each picture point and data indicative of any movement is stored and is used on read out to determine whether the picture information is taken from a single field, when movement has occurred or from both fields when movement has not occurred for that portion of the picture.

Abstract: Digital standards conversion from one T.V. line standard to another including a processor for synthesizing picture points from adjacent picture point information derived from video signals from at least one field and a digital persistence arrangement for effecting movement interpolation between incoming and stored information. The digital persistence may be cylically varied field by field as well as being variable in dependence on any picture movement detected.

Abstract: A movement detection method and system capable of detecting picture point movement in portions of a picture in the presence of noise. Each picture point within the frame in turn is examined with a corresponding picture point from the previous frame to detect when movement has occurred for that particular picture point. To distinguish between noise and movement, a number of selected picture points adjacent the picture point are also examined to see if movement is occurring. By examining a number of picture joints noise tends to be attenuated while movement is not, so that true movement can be detected.

Abstract: A chroma key measuring system for determining the area of chroma key within a television picture. The position of each side of the key area is measured line by line to determine a maximum and minimum value, and top and bottom of the area is determined from the upper and lower cross over positions of the sides to provide an output indicative of the size and position of the key area. This output can be used as a control signal for further equipment generating a further picture which is to be inserted in the key area so that the size and position of the inserted picture is adjusted to correspond to the calculated parameters.

Abstract: A video noise reduction system including a coefficient modifier for modifying at least a portion of the incoming video information. Video storage is provided to store the modified information and an adder is provided for adding at least a portion of incoming picture information with at least a portion from a corresponding stored picture point from an earlier field. The noise reduced picture information is provided at the store output. The degree of noise reduction may be varied in dependence on movement detected between fields and whether luminance or chrominance components are present.

Abstract: A video system and method for manipulating picture information in the form of a number of picture points. The information is manipulated by sequentially synthesizing a picture point from information on a number of existing picture points adjacent the synthesized picture point from at least one field. The portions of the picture points used from current and previous fields may be varied in dependence on picture movement detected between fields.

Abstract: An electronic circuit for use with telephone instruments or the like in those cases where so-called "dial tap" is encountered, whereby a buzzer or bell included as part of the telephone instrument is adversely affected when the dial is rotated for purposes of dialing a particular call number. The circuit provides a discriminating function against the short term dial pulses by blocking them, but allows ringing current to pass substantially unaffected.

Abstract: A system and method for compensating for drop outs present at the tape output of a video tape recorder. Compensation is effected by storing video information for at least one field in a field or frame store and detecting the presence of drop outs. When a drop out is detected the writing in of information to the store is inhibited so that the previously stored data is retained. The compensator may include additional storage for storing data indicative of drop out and frame identification so as to control processing at the store output to maintain correct color sub-carrier phase.

Abstract: A video data store including at least one storage device containing a plurality of storage elements together with input and output data latches. A queueing control receives write and read store commands and temporarily holds the command if a store cycle is in progress. Timing means receive the write and read commands from the queueing control and produces timing signals required for accessing the storage devices. The store may thus be operated in an asynchronous manner.

Abstract: A video control arrangement for a synchronizer includes a joystick for moving the T.V. picture in at least one plane to a first selected position. A memory arrangement receives and holds information on the location of the first preselected position which can be recalled later to effect automatic movement of the T.V. picture to this preselected position.

Abstract: A T.V. picture processing system comprising an input arrangement for receiving T.V. picture information and converting it into a form suitable for an input processor. The input processor modifies the size of the picture from information received from the input arrangement. A store is provided for storing the input processed picture information. A co-efficient generator is connected to the store for providing modification of incoming data to the store in dependence on the co-efficient generated and on data previously stored in the store. An output processor is provided for modifying the size of the picture from information received from the store and an output arrangement receives the information from the output processor and converts this into a composite T.V. signal.

Abstract: A retaining clip for attachment to a slip sheet used in the stacking and transportation of containers by forklift trucks or the like. A portion of the clip is attached to an edge of the slip sheet tab, and another portion thereof is inserted between, and grippingly engages, adjacent containers on a slip sheet so that the tab of the slip sheet is held up in position to be grasped by the forklift truck.

Abstract: A video processing system comprises an analogue to digital converter for receiving a video signal and converting the signal into digital form. A digital frame store receives and stores the converted video data. Store addressing means address locations within the frame store to write in and read out data therefrom. A digital to analogue converter receives the data read out from the frame store and converts the data into analogue form and accessing means provides random access to the frame store locations during the video blanking time to allow processing of the data with an algorithm.