Abstract: A communication system for reproducing a voice and video session includes a call center having a voice server and a video server. The call center also includes agent and supervisor workstations with computers and associated voice instruments. The voice server records and communicates voice segments associated with the session using a voice path. The computers at the agent and supervisor workstations retrieve the video segment captured and stored by the video server, and display the video segment adjusted in time to reproduce the session.

Abstract: A scheme is provided for processing previous frame data in a motion compensated digital video system to interpolate pixels used in reconstructing a current video frame. Pixel data from a previous video frame is arranged into sub-blocks containing a plurality N of pixels. The sub-blocks are stored in a memory to enable the retrieval of at least one sub-block per memory access cycle. A plurality M of sub-blocks are retrieved from the memory in response to a displacement vector associated with a portion of a current video frame. M is less than or equal to N and the M sub-blocks are retrieved in no more than M memory access cycles. A subset of pixels is chosen from the selected plurality of sub-blocks for use in interpolating pixels for the current video frame portion. The subset of pixels is processed over no more than N memory access cycles to provide N interpolated pixels for the current video frame portion.

Abstract: An ink jet printer includes a platen having a planar surface sized to hold a sheet upon which an image is to be printed flat on the planar surface. The platen is movably mounted for linear reciprocal movement between a sheet receiving position and a sheet releasing position. In operation, a sheet is fed onto or otherwise acquired on the platen. The sheet can be held on the platen by a holddown force such as by vacuum or electrostatic attraction. The platen moves a sheet held thereon across a full width printhead located between the two positions to print an image on the sheet. Sheets are released from the platen at the sheet releasing position which may include an output tray. After the sheet is released from the platen, the platen is reciprocated back to the receiving position to accept another sheet.

Abstract: Stacking apparatus for stacking sheets in corner registration to form sets positioned with respect to a finishing device such as a stitcher or stapler. The apparatus comprises a stack support surface which is inclined downwardly towards an endless belt extending across the surface and which forms a registration stop. The belt aligns the sheets in one plane and full corner registration is achieved by driving the belt to feed the sheets against a second registration stop.

Abstract: A light modulator comprises a crystal of the m3m class such as potassium tantalum niobate in which electrically-induced birefringence is obtained by setting up a field within the crystal in a direction which is not parallel to any of the crystallographic axes. With this orientation of the field (preferably at 45.degree. to the axes) the crystal becomes birefringent for light travelling parallel to the field direction. The birefringence is proportional to the square of the field. The modulator may, for example, be constructed as an amplitude modulator in which case it will be situated between a crossed polarizer and analyzer.