Techniques for efficiently determining the boundary between files and for ascertaining the difference between a HEAD response and a GET response. This arrangement renders the lasing characteristics of the VCSEL sensitive to any movement of the membrane produced by sound, vibrations, pressure changes, acceleration, etc. The memory arrangement is designed in such a way that the data signals can be transferred via data signal lines between the controller and the memory device. The lines of pixel values are moved from line buffer i to line buffer i1 as the pixel values are processed for resizing or rotation.