초록 ▼

Digital data is steganographically encoded in printed materials, and--when sensed by an appropriately-equipped webcam or other imaging device--can be used to link to associated electronic resources. Data hidden in a business card, for example, may enable linking to a person's electronic calendar--sh

Digital data is steganographically encoded in printed materials, and--when sensed by an appropriately-equipped webcam or other imaging device--can be used to link to associated electronic resources. Data hidden in a business card, for example, may enable linking to a person's electronic calendar--showing the person's schedule availability. Likewise, data hidden in a corporate ID badge may serve to unlock doors at a corporate office, or to enable access to corporate computers. Many other such applications are detailed.

대표청구항 ▼

Digital data is steganographically encoded in printed materials, and--when sensed by an appropriately-equipped webcam or other imaging device--can be used to link to associated electronic resources. Data hidden in a business card, for example, may enable linking to a person's electronic calendar--sh

Digital data is steganographically encoded in printed materials, and--when sensed by an appropriately-equipped webcam or other imaging device--can be used to link to associated electronic resources. Data hidden in a business card, for example, may enable linking to a person's electronic calendar--showing the person's schedule availability. Likewise, data hidden in a corporate ID badge may serve to unlock doors at a corporate office, or to enable access to corporate computers. Many other such applications are detailed. is accommodated in a correspondingly pot-shaped recess in the carrier, and the at least one electroacoustic transducer is mounted in the pot-shaped foam-material configuration. 6. A device as claimed in claim 3, characterized in that the foam-material configuration includes a single foam-material part. 7. A device as claimed in claim 2, characterized in that the foam-material configuration comprises open-pore and densified polyurethane. 8. A device as claimed in claim 2, characterized in that the foam-material configuration comprises open-pore and densified polyethylene. 9. A device in which a user can assume a user posture, said device comprising: at least one electroacoustic transducer; and a carrier for carrying said at least one electroacoustic transducer and for supporting an upper torso portion of said user, said carrier being made of an acoustically dense material and extending comparatively close to at least one ear of a user who is in the user posture, said at least one electroacoustic transducer being attached to the carrier for acoustic reproduction of sound signals for the ear of the user who is in the user posture, said at least one electroacoustic transducer comprising sound-generation means for generating and emitting sound waves, characterized in that the transducer is constructed for an optimum acoustic reproduction of speech-signal sound waves, additional means for realizing a distinct directivity for the speech-signal sound waves emitted by said at least one electroacoustic transducer, whereby, as a result of said distinct directivity, the speech-signal sound waves emitted from said at least one electroacoustic transducer are directed preferentially into an anterior acoustic free space and directly to the ambient air in the direction of the ear of the user who is in the user posture, characterized in that the additional means comprises a foam-material configuration including at least two foam-material parts having different foam-material structures and operative as an acoustic delay element and being arranged in a sound path of sound waves emitted into the acoustic free space via the back volume of the electroacoustic transducer, the foam-material parts at least circumferentially enclosing the at least one electroacoustic transducer in the area of the back volume, said at least two foam-material parts directly adjoining one another pairwise and each of said at least two foam-material parts directly adjoining an acoustic free space anterior of the electroacoustic transducer. 10. A device as claimed in claim 9, characterized in that one of the at least two foam-material parts comprises an acoustically dense foam material. 11. A directional loudspeaker apparatus comprising: an electroacoustic transducer for generating and emitting sound waves, a carrier made of an acoustically dense material and having a recess therein in which the electroacoustic transducer is attached, the recess in said carrier being located in a portion thereof separate from any headrest if present for a user of the loudspeaker apparatus, such that the electroacoustic transducer can emit sound waves to the ear of the user of the loudspeaker apparatus, and additional means for realizing a distinct directivity for the sound waves emitted by said electroacoustic transducer, whereby, as a result of said distinct directivity, the sound waves emitted from said electroacoustic transducer are directed preferentially to the ear of the user along a linear path from the electroacoustic transducer to the ear of the user and wherein the additional means comprises a form-material body operative as an acoustic delay element and being arranged in a sound path of the sound waves emitted into the acoustics free spaced via the back volume of the electroacoustic transducer. 12. The loudspeaker apparatus as claimed in claim 11 wherein the electroacoustic transducer is arranged to generate and emit only speech-signal sound waves. 13. The loudspeake