As already stated, that attachment is NOT a datasheet. It is a schematic for the complete circuit of a DVD player. There are many individual components used in the schematic which will have respective datasheets available, along with a few which are probably classed as proprietary and as such, unless someone has leaked the datasheet to the public domain, information will likely be pretty imposible to find.
What are you confused about?
To be more precise, what are your intentions with regard to all these datasheet requests?