Perceptible reversible watermarks

Method of retrieving compressed information in a signal having media content comprising the steps of:

• receiving or retrieving the media content (F1) including a compressed first piece of information in the form of at least a first limited part of the media content together with perceptible additional information (L), (step 59),
• retrieving the perceptible additional information from the media content, (step 60), and
• presenting at least one of additional information and at least parts of the media content to said user essentially without losses, (step 72).

Signal (30;

• 42) comprising media content (F1) as well as additional information (L) related to the media content, wherein the media content comprises a compressed (<P1>) first piece of information in the form of at least a first limited part of the media content such that the original media content and the additional information can be selectively presented to a user essentially without losses.

Media content editor (23) comprising:

• a decoder (23) arranged to retrieve media content including a compressed first piece of information (<P1>) in the form of at least a first limited part of the media content together with additional information (L) related to the media content,
• an information presentation unit (26), and
• a control unit (24) allowing processing, under the control of a user, of the additional information, such that original media content is restorable in an essentially bit-exact manner.

Computer program product (74), for editing of media content, to be used on a computer, comprising a computer readable medium having thereon:

• computer program code means, to make the computer execute, when said program is loaded in the computer:
• set a decoder to retrieve media content including a compressed first piece of information in the form of at least a first limited part of the media content together with additional information related to the media content, and
• allow processing, under the control of a user, of the additional information, such that original media content is restorable in an essentially bit-exact manner.

Computer program element for editing of media content, to be used on a computer, said computer program element comprising:

• computer program code means, to make the computer execute, when said program is loaded in the computer:
• set a decoder to retrieve media content including a compressed first piece of information in the form of at least a first limited part of the media content together with additional information related to the media content, and
• allow processing, under the control of a user, of the additional information such that original media content is restorable in an essentially bit-exact manner.