A charging system for a portable electronic device is disclosed. The beam shaping mirror causes each of the laser beams to be incident on a transmission surface, reflects the beam from a reflection surface being unparallel to the transmission surface and causes the beam to emerge from the transmission surface, thereby to convert a light intensity distribution of the beam of each of the wavelengths from an elliptic shape into a circular shape. The cap has a first and a second cap engagement location. In order to select the type of coding to be applied to the macroblock, the parameter MB_activ_Q, is determined, in which MB_activ=4lumablocksBlock_activ.