Abstract: A method for operating a data processing system to compress a first frame in an ordered sequence of image frames. A second frame precedes the first frame in the sequence of frames, and the second frame is preceded by a third frame in the sequence of frames. Each frame is divided into a plurality of processing blocks. The method first determines a displacement vector for at least one block in the second frame. The displacement vector identifies a region in the third frame that is an approximation of the block in the second frame. The displacement vectors in the second frame and measured vectors in the first frame are then used to determine an approximation for a displacement vector associated with one of the blocks in the first frame. This approximation is then used to define a search region in a frame preceding the first frame. The search region includes a plurality of sub-regions, each of the sub-regions having the same size as that block.

Abstract: Apparatus for the real-time analysis of speech signals in which a digital signal representative of the speech signal is adaptive threshold center-clipped and infinite peak-clipped to form a signal comprising three logic states (+1,0,-1). The autocorrelation function of this signal is determined by a circuit which employs simple combinational logic and an updown counter circuit. Pitch period and voiced-unvoiced indication are determined from the location and magnitude of the peak value of the autocorrelation function. Additionally, a signal representative of the speech energy is provided by summing the digital speech signals over a predetermined time interval and intervals of silence are detected by comparing the speech energy in an interval of time with a predetermined or adaptively determined threshold energy.