| 摘要 |
An apparatus for digitally encoding/decoding data including pictorial images and sounds for use in High Definition Television (HDTV), High Definition-Video Tape Recorder (HD-VCR), digital VCR, digital camcorder, multimedia, videophone, and video conference type applications. The apparatus includes a motion estimating device for a variable length encoder which encodes a video signal into variable length encoded data. The motion estimating device includes a mean error calculating circuit, responsive to the video signal, for calculating a mean error corresponding to an estimated difference between pixel data of a reference picture and pixel data of a current picture of the video signal, and a motion vector setting circuit, coupled to an output of the mean error calculating circuit, for generating a motion vector corresponding to a minimum horizontal/vertical displacement of the current picture relative to the reference picture.
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