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 = ( a 1 , a 2 , a 3 , … ⁢ , a n ) S = ( s 1 , s 2 , s 3 , … ⁢ , s n ) P = A · S  A  ⁢ ⁢  S 