Abstract: A distributed video frame store and real time processing system which includes a frame store subdivided into a number of sectors each with an associated arithmetic unit capable of parallel operation for processing data from all the sectors simultaneously. Each arithmetic unit which comprises a subtractor, multiplier and adder may be shared as a common input and output processor during write and store read cycles respectively for that sector. During a write cycle, the incoming data together is processed with previously stored data and then written into the store sector, the coefficient for the multiplier being selected in dependence on any difference measured in the subtractor. During a read cycle and stored information can be passed via the arithmetic unit to the output. During the read cycle, data from two locations within that store sector is processed, and in dependence on any movement previously detected, these locations can be from the same or alternate fields.

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 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: 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 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: 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.