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 Title: |
US5893067:
Method and apparatus for echo data hiding in audio signals
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Bender, Walter; Auburndale, MA
Gruhl, Daniel; Cambridge, MA
Morimoto, Norishige; Tokyo, Japan
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| Assignee: |
Massachusetts Institute of Technology, Cambridge, MA
other patents from MASSACHUSETTS INSTITUTE OF TECHNOLOGY (357270) (approx. 2,706)
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| Published / Filed: |
1999-04-06
/ 1996-05-31
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| Application Number: |
US1996000656378
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| IPC Code: |
Advanced:
G09C 5/00;
G10L 11/00;
G10L 19/00;
H04B 1/66;
H04H 1/00;
H04K 1/00;
Core:
more...
IPC-7:
G10L 3/02;
H03G 3/00;
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| ECLA Code: |
G10L19/00W; H04B1/66M; H04K1/00;
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| U.S. Class: |
Current:
704/502;
381/063;
704/E19.009;
Original:
704/502;
381/063;
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| Field of Search: |
704/501,500,502,229
381/063,62,61
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| Priority Number: |
| 1996-05-31 |
US1996000656378 |
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| Abstract: |
A method of hiding information in a host audio signal introduces one or more echoes into the signal. The separation in time between the host signal and an echo is associated with the value of a datum embedded in the signal. The identity of the embedded datum is determined by observing the delay between the host signal and the echo.
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| Attorney, Agent or Firm: |
Cesari and McKenna, LLP ;
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| Primary / Asst. Examiners: |
Hudspeth, David R.; Edouard, Patrick N.
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| INPADOC Legal Status: |
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| Designated Country: |
AL AM AP AZ BA BB BG BR BY CA CN CU CZ EE EP GE HU IL IS JP KG KP KR KZ LK LR LT MD MG MK MN MX NO NZ OA PL RO RU SG
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| Family: |
Show 4 known family members
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First Claim:
Show all 61 claims |
What is claimed is:
1. A method of embedding a data value in a host audio signal, the method comprising the steps of:
- a. defining an offset value associated with the data value;
- b. defining a first echo amplitude associated with the data value; and
- c. creating an encoded signal comprising the host audio signal and a first repetition of at least a portion of the host audio signal, the repetition having the first echo amplitude, and, in the encoded signal, being separated in time from the host audio signal by the offset value.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 49 U.S. patent(s) that reference this one
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| Foreign References: |
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| Other Abstract Info: |
DERABS G1998-145911
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| Other References: |
Gruhl, D. et al, "Echo Hiding", Information Hiding (1996).
Bender, W. et al, "Techniques for data hiding", IBM Systems Journal, vol. 35, No. 3-4, pp. 313-336 (1996).
(24 pages)
Cited by 53 patents
[ISI abstract]
Bender, W. et al, "Techniques for data hiding", SPIE, vol. 2420, pp. 164-173 (1995).
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