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다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0338995 (1999-06-24) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 200 인용 특허 : 245 |
Image or audio content data is encoded to steganographically convey plural bit auxiliary data. The content data is thereafter subjected to lossy compression/decompression, and the auxiliary data can still be recovered and used, e.g., to control associated audio or video equipment.
1. A method of embedding multi-bit auxiliary data into an input motion picture content signal that is thereafter compressed to yield a compressed signal, and thereafter discerning the multi-bit auxiliary data from a non-identical counterpart to a signal obtained by decompressing the compressed signa
1. A method of embedding multi-bit auxiliary data into an input motion picture content signal that is thereafter compressed to yield a compressed signal, and thereafter discerning the multi-bit auxiliary data from a non-identical counterpart to a signal obtained by decompressing the compressed signal, the method comprising:providing an input content signal comprising a plurality of samples, each sample having a value associated therewith; for each of a plurality of samples, transforming the value thereof in accordance with at least some of said multi-bit auxiliary data, wherein a first encoded content signal is produced having the auxiliary data embedded therein; compressing the first encoded content signal; decompressing the compressed, first encoded content signal to produce a second encoded content signal, said second encoded content signal being non-identical to the first encoded content signal due to said compression/decompression process; and discerning the multi-bit auxiliary data from the second encoded content signal; wherein the discerning includes processing plural redundantly-encoded excerpts of said second encoded content signal to determine the auxiliary multi-bit data embedded therein, wherein greater or lesser confidence in the auxiliary multi-bit data discerned from said second encoded content signal can be obtained by processing longer or shorter excerpts, respectively.
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