Method and apparatus for recording an information signal with scrambling thereof

Claim 1

A method of recording information signals of a binary digital signal train to an information signal recording medium formed with circular information signal tracks by scrambling the information signals with scrambling signals of cyclic codes, wherein a part of the scrambling signals is used repeatedly under overlapped conditions, wherein the information signals are scrambled by obtaining exclusive OR of the information signals and the cyclic codes composed of (2 x -1) units of binary numbers; and further a degree x of the cyclic codes is determined as follows: x>log.sub.2 {8×B.sub.sect ×(1+S.sub.max / S.sub.min)+1} wherein B sect denotes the number of bytes of the information signals recorded in one sector of the recording medium, S max denotes the number of sectors included in an outermost circumferential track of the recording medium, and S min denotes the number of sectors included in an innermost circumferential track of the recording medium.

Claim 2

A method of recording information signals of a binary digital signal train to an information signal recording medium formed with circular information signal tracks by scrambling the information signals with scrambling signals of cyclic codes, wherein a part of the scrambling signals is used repeatedly under overlapped conditions, wherein the information signals are scrambled by obtaining exclusive OR of the information signals and the cyclic codes composed of (2 x -1) units of binary numbers; and further a degree x of the cyclic codes is determined as follows: x>log.sub.2 {8×B.sub.sect ×(1+S.sub.max / S.sub.min)+1} wherein B sect denotes the number of bytes of the information signals recorded in one sector of the recording medium, S max denotes the number of sectors included in an outermost circumferential track of the recording medium, and S min denotes the number of sectors included in an innermost circumferential track of the recording medium.