Data processing apparatus and method and storage medium

• US 6,434,253 B1
• Filed: 01/28/1999
• Issued: 08/13/2002
• Est. Priority Date: 01/30/1998
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hayashi, Junichi, Iwamura, Keiichi
• Primary Examiner(s): Johns, Andrew W.
• Assistant Examiner(s): NAKHJAVAN, SHERVIN K
• Application Number:
  US09/238,570
• Time in Patent Office: 1,293 Days
• Field of Search: 382/100, 382/232, 382/248, 382/250, 382/251, 382/276, 382/280, 713/176
• US Class Current: 382/100
• CPC Class Codes: G06T 1/0035 Output size adaptive watermarking
• CPC Class Codes: G06T 2201/0052 Embedding of the watermark in the frequency domain
• CPC Class Codes: H04N 1/32154 Transform domain methods H04N1/32309 takes precedence
• CPC Class Codes: H04N 1/3216 using Fourier transforms
• CPC Class Codes: H04N 1/32165 using cosine transforms
• CPC Class Codes: H04N 1/3217 using wavelet transforms
• CPC Class Codes: H04N 1/32187 with selective or adaptive application of the additional information, e.g. in selected frequency coefficients
• CPC Class Codes: H04N 1/32277 Compression
• CPC Class Codes: H04N 19/467 characterised by the embedded information being invisible, e.g. watermarking
• CPC Class Codes: H04N 2201/3233 of authentication information, e.g. digital signature, watermark
• CPC Class Codes: H04N 2201/327 which are undetectable to the naked eye, e.g. embedded codes
• CPC Class Codes: H04N 2201/328 Processing of the additional information

Abstract

It is an object of this invention to efficiently embed digital watermark information in the above image or audio data. In order to achieve this object, there is provided a data processing apparatus comprising input means for inputting digital data including at least one of image data and audio data, transforming means for transforming a data format of the digital data, compression means for compressing the digital data whose data format has been transformed by the transforming means, and embedding means for embedding digital watermark information in the digital data whose data format has been transformed by the transforming means, wherein the apparatus includes a plurality of image processing modes, compresses the digital data by using the transforming means and the compression means in a first mode, and embeds digital watermark information in the digital data by using the transforming means and the embedding means in a second mode.

Claims

1. A data processing apparatus comprising:

input means for inputting digital data including at least one of image data and audio data;

transforming means for transforming a data format of the digital data;

compression means for compressing the digital data whose data format has been transformed by said transforming means;

embedding means for embedding digital watermark information in the digital data whose data format has been transformed by said transforming means;

first switching means for selectively outputting the digital data outputted from said transforming means to said embedding means or said compression means, said first switching means being connected after said transforming means and before said embedding means and said compression means; and

second switching means for selectively outputting the digital data outputted from said embedding means to said compression means or an another destination, said second switching means being connected after said embedding means and before said compression means,

wherein said apparatus includes a plurality of image processing modes,

compresses the digital data by using said transforming means and said compression means in a first mode, and

embeds digital watermark information in the digital data by using said transforming means and said embedding means in a second mode, and

wherein said first switching means and said second switching means execute switching between the modes, the compressing is not executed on the digital data in the second mode, and the digital watermark information is not embedded in the digital data in the first mode.

2. An apparatus according to claim 1, wherein said transforming means, said compression means, and said embedding means are inseparably integrated.

3. An apparatus according to claim 1, wherein said transforming means, said compression means, and said embedding means are inseparably arranged in one image processing board.

4. An apparatus according to claim 1, wherein transforming of the data format includes any one of wavelet transforming, cosine transforming, and Fourier transforming.

5. An apparatus according to claim 1, wherein transforming of the data format includes predictive coding.

6. An apparatus according to claim 1, wherein the plurality of image processing modes further include a third mode, and

both embedding of digital watermark information in the digital data and compression of the digital data are executed by using said transforming mean, said embedding means, and said compression means in the third mode.

7. An apparatus according to claim 1, wherein said compression means includes quantization means for quantizing the digital data whose data format has been transformed by said transforming means and entropy coding means for performing entropy coding of the quantized data.

8. An apparatus according to claim 1, wherein at least some of said transforming means, said compression means, and said embedding means constitute a media processor.

9. An apparatus according to claim 1, wherein the image data is motion image data.

10. A data processing apparatus, comprising:

input means for inputting digital data including at least one of image data and audio data;

transforming means for transforming a data format of the digital data;

compression means for compressing the digital data whose data format has been transformed by said transforming means;

embedding means for embedding digital watermark information in the digital data whose data format has been transformed by said transforming means; and

selection means for selecting whether to embed digital watermark information in the digital data or compress the digital data first,

wherein said apparatus includes a plurality of image processing modes,

compresses the digital data by using said transforming means and said compression means in a first mode, and

embeds digital watermark information in the digital data by using said transforming means and said embedding means in a second mode, and

both embedding of digital watermark information in the digital data and compression of the digital data are executed by said transforming means, said embedding means, and said compression means in a third mode.

11. A data processing apparatus comprising:

input means for inputting digital data including at least one of image data and audio data;

transforming means for transforming a data format of the digital data;

compression means for compressing the digital data whose data format has been transformed by said transforming means; and

embedding means for embedding digital watermark information in the digital data whose data format has been transformed by said transforming means,

wherein said apparatus includes a plurality of image processing modes,

compresses the digital data whose data format has been transformed by said transforming means, and then embeds digital watermark information in the compressed data in a first mode, and

embeds digital watermark information in the digital data whose data format has been transformed by said transforming means, and then compresses the digital data in the second mode.

12. An apparatus according to claim 11, wherein transforming of the data format includes any one of wavelet transforming, cosine transforming, and Fourier transforming.

13. An apparatus according to claim 11, wherein said compression means includes quantization means for quantizing the digital data whose data format has been transformed by said transforming means, and entropy coding means for performing entropy coding of the quantized data.

14. An apparatus. according to claim 11, wherein at least some of said transforming means, said compression means, and said embedding means constitute a media processor.

15. An apparatus according to claim 11, wherein the image data is motion image data.

16. A data processing method comprising the steps of:

inputting digital data including at least one of image data and audio data;

transforming a data format of the digital data;

compressing the digital data whose data format has been transformed; and

embedding digital watermark information in the digital data whose data format has been transformed,

wherein the method includes a plurality of image processing modes,

compresses the digital data whose data format has been transformed, and then embeds digital watermark information in the compressed data in a first mode, and

embeds digital watermark information in the digital data whose data format has been transformed, and then compresses the digital data in the second mode.

17. A storage medium storing data processing method comprising the steps of:

inputting digital data including at least one of image data and audio data;

transforming a data format of the digital data;

compressing the digital data whose data format has been transformed; and

embedding digital watermark information in the digital data whose data format has been transformed,

wherein the method includes a plurality of image processing modes,

compresses the digital data whose data format has been transformed, and then embeds digital watermark information in the compressed data in a first mode, and

embeds digital watermark information in the digital data whose data format has been transformed, and then compresses the digital data in the second mode.