A stand attachment structure includes a front cabinet, a rear cabinet and a pair of screws. Unique chip ID values may be assigned to chips in a system having multiple branches. In a first embodiment, the attachment element is a third member with a ratchet face that engages a ratchet on the rear face of the first and second U-shaped members along with an T-shaped clamping arm that is adjustably bolted to the U-shaped member. The encoder further comprises a moving picture compression unit, a still picture compression unit, and a recording unit.