Media distribution methods and systems with quality degradation

• US 20070086033A1
• Filed: 10/14/2005
• Published: 04/19/2007
• Est. Priority Date: 10/14/2005
• Status: Abandoned Application

• Current Assignee: Sony Interactive Entertainment Inc. (Sony Group Corp.)
• Original Assignee: Sony Computer Entertainment Incorporated (Sony Group Corp.)
• Inventors: Tu, Edgar
• Application Number:
  US11/251,293
• Publication Number:
  US 20070086033A1
• Time in Patent Office: Days
• US Class Current: 358/1.120
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00818 wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals

Abstract

Methods and apparatus are provided for copying digital content, such as videos and feature-length movies, that introduce a degree of degradation into each successive copy generation. The introduced degradation can take many different forms, from noise that emulates the noise introduced by analog copying, to reductions in the numbers of colors used. The methods and apparatus can also comprise transcoding the digital content.

Claims

1. A method for producing a degraded copy of digital content, the method comprising:

receiving the digital content;

degrading the digital content; and

outputting the degraded digital content as the degraded copy.

2. The method of claim 1 wherein receiving the digital content includes receiving commercial quality digital content.

3. The method of claim 1 wherein receiving the digital content includes receiving a storage medium containing the digital content.

4. The method of claim 1 wherein receiving the digital content includes downloading a file containing the digital content.

5. The method of claim 1 wherein receiving the digital content includes receiving streaming media.

6. The method of claim 1 wherein degrading the digital content includes a reduction in quality of about 10%.

7. The method of claim 1 wherein degrading the digital content includes introducing noise to the digital content.

8. The method of claim 7 wherein introducing noise emulates analog copying.

9. The method of claim 1 wherein degrading the digital content includes replacing a percentage of pixels with other values.

10. The method of claim 9 wherein the other values are random values.

11. The method of claim 9 wherein the other values are the same value.

12. The method of claim 1 wherein degrading the digital content includes reducing a dynamic range of a sound recording.

13. The method of claim 1 wherein degrading the digital content includes reducing the number of colors of a video recording.

14. The method of claim 1 wherein degrading the digital content includes reducing the luminosity of pixels of a video recording.

15. The method of claim 1 wherein degrading the digital content includes degrading fewer than all of the frames of a video recording.

16. The method of claim 1 wherein degrading the digital content includes removing frames of a video recording.

17. The method of claim 1 wherein degrading the digital content includes reducing an image area of a video recording.

18. The method of claim 1 wherein degrading the digital content includes overlaying a scroll bar over a video recording.

19. The method of claim 1 wherein degrading the digital content includes adding a fade effect to a video recording.

20. The method of claim 1 wherein degrading the digital content includes using a compression codec that employs an insufficient number of bits in a compression algorithm than would otherwise be needed to faithfully represent the digital content.

21. The method of claim 1 further comprising determining whether the digital content has previously been degraded.

22. The method of claim 1 further comprising transcoding the degraded digital content.

23. An apparatus for degrading digital content comprising:

means for receiving digital content;

means for degrading the digital content; and

means for outputting the degraded digital content as the degraded copy.

24. The apparatus of claim 23 wherein the means for degrading the digital content introduces noise to the digital content in a manner that emulates analog copying.

25. A multimedia home server comprising:

a digital content input for receiving digital content from a digital content source;

electronics for degrading the digital content; and

an output for providing the degraded digital content to a digital content player.

26. The multimedia home server of claim 25 wherein the digital content input is configured to receive streaming media.

27. The multimedia home server of claim 25 wherein the electronics for degrading the digital content includes a dedicated processor.

28. The multimedia home server of claim 27 wherein the dedicated processor is configured to transcode the degraded digital content.