A broadcasting system 1 provides a digital content to be broadcast with an attribute vector A thereof. A filter 12 is assigned with a selection vector S indicating user's taste. The filter 12 performs a standardized inner product operation between the selection vector S and the attribute vector A for selecting and recording broadcast programs. A=(a1, a2, a3, . . . , an) S=(s1, s2, s3, . . . , sn) P = A · S  A  ⁢ ⁢  S 