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Modifying source material

A material and element technology, applied in the field of perceptible modification, can solve the problem of low compression efficiency

Inactive Publication Date: 2002-07-10
索尼欧洲有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, compression is often less efficient if modifications are made to the footage that require adding data to the footage

Method used

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  • Modifying source material
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Experimental program
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Embodiment approach

[0034] overview

[0035] Embodiments of the invention described herein are applicable to the modification of images, in this case embedding watermarks in images. Figure 13 is an example of generating a watermarked image according to an embodiment of the present invention; it will be more clearly seen from the description set forth below, although Figure 13 The overall effect of the modification given is a pattern of intelligible shape (SONY), but the modification itself does not represent data, and the pattern itself need not be intelligible.

[0036] Encoder, Fig. 1.

[0037] Figure 1 is an example of an encoder. The encoder of Figure 1 may be, for example, a high definition camera / video recorder incorporating an image compression system. The encoder comprises a color analog image source 1 and an analog to digital converter and processor 2 for image samples according to the well known 4:2:2 format. Such as figure 2 As shown, each of the 1080 lines in a luminance compon...

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Abstract

Material is represented by transform coefficients represented by digital numbers. A method of perceptibly watermarking the material comprises the steps of: changing representations of the said numbers according to an invertible algorithm without changing the number of bits in the said numbers; and encoding the changed n bit numbers to effect compression encoding of the material.

Description

technical field [0001] The present invention relates to modifying material, and the preferred embodiment of the present invention relates to perceptual modification. [0002] The "material" used here refers to information material including at least one or more of image material, sound material and data material. Image materials are divided into still and moving images, which include video signals and other forms of information signals representing images. Background technique [0003] We all know watermark material. The watermark may be data embedded in the material in the form of a watermark. Watermarks can be perceptible or hidden. The preferred embodiment of the present invention employs visual watermarking. [0004] It is known to embed a watermark in an image by transforming the image from the spatial domain to the transform domain, such as the wavelet domain, and embedding the watermark by changing the wavelet coefficients. The watermarked transform domain image ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G10L19/018G10L25/51H04N1/387H04N7/08H04N7/081H04N19/60
CPCG06T2201/0052G06T2201/0083G06T1/0035H04N19/00557G06T2201/0053H04N19/467
Inventor J·C·柏利S·M·基庭
Owner 索尼欧洲有限公司