| 摘要 |
<p>PURPOSE:To attain the conversion of picture elements at a high speed by adding the value -N to the sum total value to count up an address which points the storage position of an output buffer and then adding the value M to the sum total value to count up an address which points the storage position of an input buffer respectively. CONSTITUTION:A means which checks whether the sum total value is negative or not produces a 1st signal showing that the sum total value is not negative and a 2nd signal showing that the sum total value is negative. The picture element data stored in the storage position of an input buffer 2 pointed by an address counter 7 is stored, i.e., moved to the storage position of an output buffer 3 pointed by an address counter 8 in response to the 1st signal. Then the sum total value is updated by adding the value -N to the sum total value. The value M is added to the sum total value in response to the 2nd signal so that the sum total value and then the address of the storage position of the buffer 2 are updated. As a result, the picture elements can be converted at a high speed.</p> |
