PURPOSE: To execute high density recording without deteriorating a signal to the limit of the resolving power of film by providing a digital sound track where digital sound data is optically two-dimensionally recorded as the data which does not include an isolated pit.
CONSTITUTION: The digital sound data in 8-bit units obtained by digitizing an analog sound signal is two-dimensionally recorded on the digital sound track 5(6) as the pit pattern of 4×3=12 bits which does not include the isolated pit by 8-12 modulation. The shortest repeat lengthwise or breadthwise is equal to or above 2 pits, and the digital sound data is two-dimensionally recorded on the track 5(6) of motion picture film 1 as the pit pattern whose lengthwise and breadthwise four directions are not surrounded by other kinds of pits, so that any of up, down, right and left pits becomes the same kind. Therefore, the film 1 is hardly deteriorated by diffraction at the time of recording and the diffusion of particles at the time of developing.
YAMAMOTO KENJI
YOSHIMURA SHUNJI
