Copying method of compressed digital data

A digital data compression technology, applied in data recording, image data processing, digital signal formatting, etc., can solve problems such as expensive and complex applications

Inactive Publication Date: 2003-05-14
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It therefore has the disadvantage of being particularly complex and expensive to apply

Method used

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  • Copying method of compressed digital data
  • Copying method of compressed digital data
  • Copying method of compressed digital data

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Embodiment Construction

[0014] The invention relates to a method of duplicating compressed digital data on an information medium taking into account the deterioration of the information originally contained in the image at each generation of duplication. The compressed digital data may originate from a source information medium or be downloaded from a communication network such as the Internet.

[0015] The invention also applies to storing said set of compressed digital data in a reduced format on an information medium of limited size according to the available storage capacity of said medium.

[0016] The invention is particularly performed in the context of the MPEG standard for digital video signals, but other compression techniques are also possible. Thus the duplication method according to the invention can be applied to any digital multimedia signal comprising digital data compressed into a succession of segments according to a scalable compression format. One segment, for example, correspond...

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Abstract

The present invention relates to a method of copying compressed digital data onto an information medium. Said digital data have been compressed by successive fragments according to a scalable compression format, and a fragment according to said format comprises a base layer and at least one improvement layer. The copying method according to the invention comprises a step of eliminating part of the at least one improvement layer. It next comprises a step of copying the improvement layer thus truncated onto a destination information medium. These steps are iterated for all or some of the fragments constituting the digital multimedia signal.

Description

technical field [0001] The invention relates to a method of duplicating compressed digital data on an information medium. A corresponding device is also involved. [0002] It has found particular application in a device allowing the recording of compressed audio or video digital data encoded using encoding techniques such as the MPEG (Moving Picture Experts Group) standard on an information medium of the CD or DVD type. It relates in particular to the duplication of said compressed digital data taking into account the deterioration of the original contained information. Background technique [0003] Current digital data encoding techniques make it possible to obtain reproductions of multimedia works of excellent quality. With the advent of multimedia digital data recording devices, there is a risk of being able to see a large number of broadcasts that reproduce multimedia works regardless of copyright legislation. This risk is exacerbated by the fact that the quality of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/91G11B20/00G11B20/10G11B20/12H04N5/913H04N7/08H04N7/081H04N7/24H04N9/804H04N9/87
CPCH04N5/913H04N21/234327H04N21/64792H04N21/4325H04N21/4402H04N9/87G11B20/00007H04N21/44204H04N21/4621H04N9/8042G11B20/10
Inventor J·戈贝尔
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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