A method of encoding a stream of data elements is provided which involves splitting the stream of data elements into a first stream and a second stream; encoding the first stream to produce a first encoded stream; performing a constellation mapping using a combination of the first encoded stream and a third stream which is based an the second stream. The latch mechanism further includes at least one pawl rotably attached to the module such that when the lever arm is moved to the latched position, the lever arm rotates the pawl into a latched position wherein the pawl has an interference fit with the chassis. A security-reference-information transmitting unit transmits, to the peripheral device, security reference information serving as the supplementary information. Foam is disposed between the first panel and the second panel. A laser removal is performed to remove a part of the first portion of the UBM layer and to form an UBM. The performance parameter can be correlated to the performance requirements of an electronic device portion, and the electronic design portion can be implemented in a core region that has a performance parameter matched to the needs of the electronic design portion.