For m/n beat wavelet and MxN pixel input image, the control method of the present invention includes using m+2 registers with size M to accept serial input, outputting data parallelly for streamline row conversion and line conversion; adopting control register write mode for front end expansion of lines to save memory space and raise conversion speed; and adopting control register write and symmetrical make-up mode for the back end expansion of lines. The present invention adopts parallel embedded buffer memory to convert the serial input into parallel output, realizes the streamline operation of wavelet row-line conversion, realizes front end and back end expansion of row data via the read-write control of registers, and has simple structure and high operation speed. |