| 摘要 |
A data compression device for a facsimile apparatus or like picture processing apparatus is operable with a desirable coding efficiency to remarkably reduce the transmission time. When the absolute value of a difference between the numbers of transition points of picture signals associated with two adjacent scanning lines is larger than a predetermined run difference coefficient, the device codes the picture signals by a one-dimensional mode coding operation which occurs with respect to the main scan direction only. When the former is equal to or smaller than the latter, the device codes the picture signals in a two-dimensional mode coding operation which occurs with respect to both the main scan direction and the subscan direction.
|
