VAE8015/VAE8020 functionality: • Loading of 8 cm and 12 cm discs by a motorized tray • Disc type recognition and in case of a DVD+RW disc laser power calibration • Servo control for disc rotation, sledge movements, tilt, focus and actuator position • EFM+ encoding / decoding for DVD, and EFM decoding for CD • Writes and read DVD+RW discs and reads DVD, CD and CD-R/RW discs • Linking control, header insertion and sector number updating at record • Interfacing to the MPEG back-end (S2B) for control and (I2S and V4) for data • The back-end has to provide MPEG data processing, data buffering, construction • of logical format for Lead-in, Data area and Lead-out part of the DVD+RW dis