| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an encoding circuit wherein a high compression ratio can be achieved in video encoding with a small-scale circuit. <P>SOLUTION: A block motion detecting circuit 1j detects motion in a block. More specifically, for both blocks of corresponding fields subjected to Hadamard transform, average values of luminance values are calculated. The block motion detecting circuit 1j determines that, when a difference between the average values lies within a predetermined range, there is no motion in the block, while it determines that there is motion in the block when the difference is outside the predetermined range. The circuit 1j supplies the determination result to a Huffman encoding circuit 1h. When the Huffman encoding circuit 1h receives from the block motion detecting circuit 1j the determination result indicating a motion, the Huffman encoding circuit 1h performs an ordinary process (process of encoding addition/subtraction results). On the other hand, when the Huffman encoding circuit 1h receives from the block motion detecting circuit 1j the determination result indicating no motion, the circuit 1h encodes and transmits a motion detection signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
