A data processing apparatus and method are provided for pre-decoding instructions. The process discloses frying food products at atmospheric pressure, and deoiling the fried food products using a centrifuge under vacuum pressure. Extrudate shrinkage can also be reduced and controlled by controlling the die swell of the visco-elastic melt by rotating the roller at a selected roller speed less than the melt speed. The image coder orders the vectors in the codebooks and assigns vector indexes to the vectors such that a bit error occurring at a less significant bit in a vector index results in less distortion than a bit error occurring at a more significant bit. A thin-film resistor sensor element is formed in a layer higher than the second thin-film heater element and closer to the air bearing surface than the second heater element. A discrete spray gun is provided for each of the products.