Abstract: An apparatus and method for providing video on demand (VOD) service are disclosed, in which a transmission frequency of a program per channel is updated to detect transport stream identifier even in case that the transmission frequency is varied. The method for providing VOD service of a receiving system includes updating a channel map if a transmission frequency included in received service information is varied; and extracting and storing transport stream identifier by scanning a transmission frequency band of the channel map.

Abstract: Provided is a resin composition for laser marking comprising 0.0005 to 0.5 parts by weight of a black pigment, a black dye, or a mixture thereof, and 0.0001 to 0.5 parts by weight of a blue dye, a blue pigment, or a mixture thereof based on 100 parts by weight of a transparent resin composition comprising 80 to 99 wt % of a rubber quarternary transparent copolymer composition or rubber quarternary transparent copolymer, and 1 to 20 wt % of a thermoplastic urethane elastomer or a thermoplastic amide elastomer. A laser marking produced using the resin composition for laser marking according to the present invention has high chemical resistance. In addition, the use of the resin composition for laser marking allows for achievement of highly visible white markings without a yellowish tint and easily adjustable transparency of the marked product.