Optical disk with copy protection, and apparatus and method for recording and reproducing same

Optical disk recording apparatus, for use with a data stream signal defining a channel clock having a frequency of f.sub.CC clocks per unit time, comprising:

• a spinner for spinning a disk;
• a write head disposed relative to said disk and directing a writing beam toward a surface of said disk, said writing beam being moveable radially relative to said disk so as to traverse a substantially spiral centerline of said spinning disk, said write head modulating said beam in response to said data stream signal, said write head further having a deflection signal input and deflecting said beam radially with respect to said disk in response to a signal received on said deflection signal input;
• and
• a wobble control circuit having an output connected to said deflection signal input, said wobble control circuit producing an output signal on its output which has substantially greater energy at a predefined frequency f.sub.CPW than at a frequency of f.sub.CC /196, at least.

Optical disk recording apparatus, for use with a data stream signal defining a channel clock having a frequency of f.sub.CC clocks per unit time, comprising:

• a spinner for spinning a disk;
• a write head disposed relative to said disk and directing a writing beam toward a surface of said disk, said writing beam being moveable radially relative to said disk so as to traverse a substantially spiral centerline of said spinning disk, said write head modulating said beam in response to said data stream signal, said write head further having a deflection signal input and deflecting said beam radially with respect to said disk in response to a signal received on said deflection signal input;
• and
• a wobble control circuit having an output connected to said deflection signal input, said wobble control circuit producing an output signal on its output which has substantially greater energy at a frequency f.sub.CPW than at a predefined reference frequency f.sub.REF, where f.sub.CPW is approximately equal to an integer sub-harmonic of f.sub.CC /196.

Optical disk recording apparatus, comprising:

• a spinner for spinning a disk;
• a write head disposed relative to said disk and directing a writing beam toward a surface of said disk, said writing beam being moveable radially relative to said disk so as to traverse a substantially spiral centerline of said spinning disk, said write head modulating said beam in response to a beam modulation signal;
• and
• a modulation signal provider which provides said beam modulation signal in accordance with a first channel clock frequency f.sub.CC1 when said beam is traversing a first predetermined segment of said centerline, and which provides said data stream signal in accordance with a second channel clock frequency f.sub.CC2 when said beam is traversing a second predetermined segment of said centerline, said spinner spinning said disk at a first linear velocity when said beam is traversing said first predetermined segment of said centerline and spinning said disk at a second linear velocity substantially equal to said first linear velocity when said beam is traversing said second predetermined segment of said centerline,
• wherein f.sub.CC1 bears a predetermined non-equal relationship to f.sub.CC2 and said write head further has a deflection signal input and deflects said writing beam radially with respect to said disk in response to a signal received on said deflection signal input, further comprising:
• a wobble control circuit having an output connected to said deflection signal input, said wobble control circuit producing an output signal on its output which has substantially greater energy at a frequency f.sub.CPW than at a predefined reference frequency f.sub.REF, where f.sub.CPW is approximately equal to an integer sub-harmonic of f.sub.CC /196.

Optical disk recording apparatus, comprising:

• a spinner for spinning a disk;
• a write head disposed relative to said disk and directing a writing beam toward a surface of said disk, said writing beam being moveable radially relative to said disk so as to traverse a substantially spiral centerline of said spinning disk, said write head modulating said beam in response to a beam modulation signal;
• and
• a modulation signal provider which provides said beam modulation signal in accordance with a first channel clock frequency f.sub.CC1 when said beam is traversing a first predetermined segment of said centerline, and which provides said data stream signal in accordance with a second channel clock frequency F.sub.CC2 when said beam is traversing a second predetermined segment of said centerline, said spinner spinning said disk at a first linear velocity when said beam is traversing said first predetermined segment of said centerline and spinning said disk at a second linear velocity substantially equal to said first linear velocity when said beam is traversing said second predetermined segment of said centerline,
• wherein f.sub.CC1 bears a predetermined non-equal relationship to f.sub.CC2 and said write head further has a deflection signal input and deflects said writing beam radially with respect to said disk in response to a signal received on said deflection signal input, further comprising:
• a wobble control circuit having an output connected to said deflection signal input, said wobble control circuit producing an output signal on its output which has substantially greater energy at a frequency f.sub.CPW than at a predefined reference frequency f.sub.REF, where f.sub.CPW is approximately equal to an integer sub-harmonic of f.sub.CC3 /196.