A frame error concealment method and apparatus and a decoding method and apparatus using the same. The improved source collimator utilizes a larger collimation angle than has previously been used in the art. For the industry as a whole, the optimal value of the IT benchmark is determined on the basis of profitability measures for individual companies within the industry. In addition, the ignition coils are fixed by a fixture, which has arrangement positions for the ignition coils predetermined according to the mounting directions thereof, in such a manner that the directions of adjacent ignition coils do not coincide with one another, the ignition coils being installed on the engine through the fixture. A telephone number or MIN may be placed on a \u201cblacklist\u201d with a \u2018timer\u2019. In one embodiment, a headlamp comprises a light source and a reflector, which cooperate to form a light pattern, a lens positioned forward of the reflector and configured to project a desired beam pattern, and a light shield disposed between the lens and the reflector.