Motion vector detecting apparatus for video telephone/teleconfer

Details Motion vector detecting apparatus for video telephone/teleconfer Motion vector detecting apparatus for video telephone/teleconfer

1991-06-19

1992-08-25

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, H04N 713

Patent

active

051423618

ABSTRACT:
A motion vector detecting apparatus for detecting motion vectors based on a current frame data and the preceding frame data. In the motion vector detecting apparatus, first and second memories are provided in order to store the current frame data and the preceding frame data. Additionally, a number of first cache memories, a number of second cache memories, a control circuit, and a motion vector calculation circuit are provided. The control circuit selects the input cache memories into which pixel data are to be written, and the output cache memories, from which pixel data are to be read out, from the first and second cache memories, so that the input cache memories and the output cache memories have no redundant cache memory. Pixel data corresponding to the detection image blocks stored in the first memory and pixel data corresponding to the search image blocks stored in the second memory are sequentially written in the selected input cache memories of the first and second cache memories. Simultaneously, the pixel data corresponding to the detection image blocks and the search image blocks are sequentially read out from the selected output cache memories, and are sequentially supplied to the motion vector calculation circuit.

REFERENCES:
patent: 4800425 (1989-01-01), Schwerzel et al.
patent: 5012337 (1991-04-01), Gillard

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