A power delivery system for a vehicle is disclosed. Only the light which impinges on this entering area passes into the core and is guided therein. A collector or a drain of the voltage change detecting element is connected to the collector or the drain of the driving element, and a gate of the voltage change detecting element is connected to an emitter or a source of the voltage change detecting element. In addition, the surface roughness of the hitting surface may also be increased as loft increases to further control the spin imparted to the ball. The encodingdecoding apparatus decodes a data sequence to be decoded, included in the encoded data sequence, by using the data interleaving processes and the sequences of first and second error correcting codes.