| 摘要 |
PURPOSE:To avoid the oscillation as at feedback control by devising the transmitter such that the transmission data quantity is controlled to be smaller than a prescribed object by means of feedforward control. CONSTITUTION:A DC component among coefficient data obtained by cosine transformation to a 2-dimension picture block is sent as an original data together with address information sets A0, P0 of a sub block and only a data DATAi not being 0 and significant is sent as the AC component together with address information sets Ai, Pi of a sub block. The transmission data quantity is obtained as the sum of the data quantity relating to the DC component being a fixed data quantity and the address information and the coefficient data relating to the calculated AC component. Then the data quantity required for the transmission is controlled smaller than an object by means of feedforward control. Thus, a problem such as oscillation is not caused different from the case with the feedback control. |
