A context-based adaptive binary arithmetic coding decoding device and a coding method thereof are provided. The distributor conveyor band V is connected to a carrier frame T and can be removed with its carrier frame T from the mobile feeder B. Alternate forms of volumetric enclosures are described for different lens arrangements in compound camera systems. Alternatively the microdisplay may be based on hybrid integration of InGaN based III-nitride semiconductors for blue and green emissions, and AlGaInP based semiconductors for red emissions.