Method for facilitating copyright protection in digital media and digital media made thereby
View Patent ↗In one embodiment, a disc has a substrate; a data layer on the substrate; an anomaly-feature in the data layer disc capable of generating a read anomaly having a predictable anomaly profile; and anomaly profile data recorded in the data layer for characterizing the anomaly-feature. A disc can be labeled by imposing an anomaly-feature in the data layer capable of generating a read anomaly having a predictable anomaly profile; and disposing anomaly profile data on the disc, wherein the anomaly profile data characterizes the anomaly-feature.
1. A disc, comprising:
a substrate;
a data layer on the substrate;
a protective layer on a side of the data layer opposite the substrate;
an anomaly-feature in the data layer capable of generating a read anomaly having a predictable anomaly profile, wherein the anomaly-feature comprises a superimposed data anomaly-feature comprising first data overlying second data; and
anomaly profile data in the data layer for characterizing the anomaly-feature.
2. The disc of claim 1 , wherein one or both of the first data and the second data comprises a mark comprising a series of pits and lands extending for a distance of about 1 mm to about 50 mm along a spiral data track.
3. The disc of claim 2 , wherein one or both of the first data and second data comprises a mark sequence.
4. The disc of claim 3 , wherein the first data comprises a first mark sequence and the second data comprises a second mark sequence, and wherein the second mark sequence overlays the first mark sequence in staggered relation thereto.
5. The disc of claim 4 , further comprising a third mark sequence overlaying the second mark sequence in staggered relation thereto.
6. A disc, comprising:
a substrate;
a data layer on the substrate;
a protective layer on a side of the data layer opposite the substrate;
an anomaly-feature in the data layer capable of generating a read anomaly having a predictable anomaly profile; and
anomaly profile data in the data layer for characterizing the anomaly-feature
wherein the disc comprises a predetermined format comprising a spiral data track configuration, and wherein the anomaly-feature comprises wobble in the spiral data track; and
anomaly profile data in the data layer for characterizing the anomaly-feature.
7. The disc of claim 6 , wherein the wobble has an amplitude of about 25 nanometers to about 3,500 nanometers and a frequency of about 1 hertz to about 100 kilohertz at a rotational speed of about 1×.
8. The disc of claim 7 , wherein the wobble has an amplitude of about 50 to about 1,600 nanometers.
9. The disc of claim 6 , wherein the wobble comprises eccentricity having a magnitude of about 500 nanometers to about 200 micrometers.
10. A method for labeling a disc, the method comprising:
imposing an anomaly-feature in the data layer capable of generating a read anomaly having a predictable anomaly profile;
disposing anomaly profile data on the disc, wherein the anomaly profile data characterizes the anomaly-feature; and
overwriting first data with second data;
wherein the disc comprises a substrate and a data layer with a protective layer on a side of the data layer opposite the substrate.
11. The method of claim 10 , wherein one or both of the first data and second data comprises a mark comprising a series of pits and lands extending for a distance of about 1 mm to about 50 mm along the spiral data track.
12. A method for labeling a disc, the method comprising:
imposing an anomaly-feature in the data layer capable of generating a read anomaly having a predictable anomaly profile; and
disposing anomaly profile data on the disc, wherein the anomaly profile data characterizes the anomaly-feature;
wherein the disc comprises a substrate and a data layer with a protective layer on a side of the data layer opposite the substrate and comprises a predetermined format comprising a spiral data track configuration, and further comprising writing data on the disc in a configuration defining a wobble in the spiral data track.
13. A method for labeling a disc, the method comprising:
imposing an anomaly-feature in the data layer capable of generating a read anomaly having a predictable anomaly profile; and
disposing anomaly profile data on the disc, wherein the anomaly profile data characterizes the anomaly-feature, wherein the anomaly-feature further comprises wobble having an amplitude of about 25 nanometers to about 3,500 nanometers and a frequency of about 1 hertz to about 100 kilohertz at a rotational speed of about 1×;
wherein the disc comprises a substrate and a data layer with a protective layer on a side of the data layer opposite the substrate.
14. A method for labeling a disc, the method comprising:
imposing an anomaly-feature in the data layer capable of generating a read anomaly having a predictable anomaly profile; and
disposing anomaly profile data on the disc, wherein the anomaly profile data characterizes the anomaly-feature, wherein the anomaly-feature further comprises eccentricity having a magnitude of about 500 nanometers to about 200 micrometers;
wherein the disc comprises a substrate and a data layer with a protective layer on a side of the data layer opposite the substrate.