Patent ID: 6466617
Filing Date: 2002-10-15
Classification: H04N

Abstract:
An apparatus for superimposing information on a main information signal, said apparatus comprising:generating means for generating superimposing information composed of plurality of bits; superimposing means for superimposing said superimposing information on said main information signal by allocating one bit of said superimposing information to one of one block and a plurality of blocks of said main information signal, each said block containing a predetermined amount of data, and generating said main information signal with said superimposing information; and compressing means for converting said information signal with said superimposing information signal from a time-base area signal to a frequency area coefficient by transforming said information signal with said superimposing information for each of said plurality of blocks and for compressing said information signal with said superimposing information and generating a compressed main information signal.