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Method of and system for transmitting two different messages on a carrier wave over a single transmission channel of pre 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04J-009/00
  • H04J-011/00
출원번호 US-0970835 (1978-12-19)
우선권정보 DE-2757171 (1977-12-22)
발명자 / 주소
  • Gassmann Gerhard-Gnter (Esslingen-Berkheim DEX)
출원인 / 주소
  • International Standard Electric Corporation (New York NY 02)
인용정보 피인용 횟수 : 233  인용 특허 : 0

초록 ▼

In a radio broadcoast channel, an additional message is superimposed on the normal message so as to be inaudible to the listener. To accomplish this, the additional message, consisting of digital signals, is modulated on a subcarrier lying in the ear-physiological masking range of the normal message

대표청구항 ▼

A receiver for use in a transmission system of the type that includes a transmitter having means for providing a first message, a bandpass filter for passing said first message in a baseband, a multiplexer for multiplexing information units of a second message, a clock generator for stepping the mul

이 특허를 인용한 특허 (233)

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  175. Rhoads,Geoffrey B., Network linking using index modulated on data.
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  176. Marchok, Daniel J.; Younce, Richard C.; Melsa, Peter J. W., OFDM/DMT/ digital communications system including partial sequence symbol processing.
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  177. Jones, Robert; Bi, Daoshen; Duggan, Charles F.; Schneck, Nelson T., Optically variable personalized indicia for identification documents.
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  178. Rodriguez, Tony F.; Carr, Jonathan Scott; Rhoads, Geoffrey B., Paper-based control of computer systems.
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  179. Hannigan, Brett T.; Reed, Alastair M.; Bradley, Brett A., Perceptual modeling of media signals for data hiding.
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  180. Hannigan, Brett T.; Reed, Alastair M.; Bradley, Brett Alan, Perceptual modeling of media signals for data hiding.
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  181. Hannigan,Brett T.; Reed,Alastair M.; Bradley,Brett Alan, Perceptual modeling of media signals for data hiding.
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  182. Rhoads Geoffrey B., Photographic products and methods employing embedded information.
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  183. Rhoads,Geoffrey B.; Davis,Bruce L.; Evans,Douglas B., Portable devices and methods employing digital watermarking.
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  184. Rhoads, Geoffrey B., Printable interfaces and digital linking with embedded codes.
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  185. Alattar, Adnan M., Process for marking substrates with information using a texture pattern and related substrates.
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  186. Powell,Robert D.; Nitzberg,Mark, Protecting images with image markings.
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  187. Eastmond Bruce C. (Downers Grove IL) Phillips Sharon E. T. (Lake In The Hills IL), SSB communication system with FM data capability.
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  188. Rhoads,Geoffrey B., Securing media content with steganographic encoding.
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  189. Geoffrey B. Rhoads, Security documents with hidden digital data.
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  190. Bradley, Brett A., Self-orienting watermarks.
    상세보기
  191. Bradley,Brett A., Self-orienting watermarks.
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  192. Rhoads Geoffrey B., Signal processing to hide plural-bit information in image, video, and audio data.
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  193. Rhoads, Geoffrey B., Signal processing to hide plural-bit information in image, video, and audio data.
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  194. Lee Edward A. (Berkeley CA) Shaw David G. (Middletown NJ), Simultaneous transmission of speech and data over an analog channel.
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  195. Nash Randy D. (Ocean NJ) Wong Wai C. (Aberdeen NJ), Simultaneous transmission of speech and data over an analog channel.
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  196. Moses Donald W. (Minneapolis MN) Hustig Charles (Hudson WI) Ballard C. Ray (Venice FL), Simultaneous transmission of two information signals within a band-limited communications channel.
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  197. Srinivasan,Venugopal, Spectral audio encoding.
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  198. Rhoads, Geoffrey B., Steganographic encoding and decoding of auxiliary codes in media signals.
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  199. Rhoads, Geoffrey B., Steganographic encoding and decoding of auxiliary codes in media signals.
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  200. Rhoads, Geoffrey B., Steganographic encoding and detecting for video signals.
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  201. Rhoads, Geoffrey B., Steganographic image processing.
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  202. Rhoads Geoffrey B., Steganographic methods and media for photography.
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  203. Rhoads Geoffrey B., Steganographic system.
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  204. Miller, Marc D.; Levy, Kenneth L.; Rhoads, Geoffrey B., Steganographic systems and methods.
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  205. Miller, Marc D.; Levy, Kenneth L.; Rhoads, Geoffrey B., Steganographic systems and methods.
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  206. Geoffrey B. Rhoads, Steganographically encoding a first image in accordance with a second image.
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  207. Evans, Douglas B.; Conwell, William Y., Substituting information based on watermark-enable linking.
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  208. Evans,Douglas B.; Conwell,William Y., Substituting objects based on steganographic encoding.
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  209. Evans, Douglas B.; Conwell, William Y., Substituting or replacing components in media objects based on steganographic encoding.
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  210. Howard, James V.; Frazier, Francis; Siamak, Parviz, Systems and methods for managing and detecting fraud in image databases used with identification documents.
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  211. Ramos, Daniel O.; Jones, Kevin C.; Rhoads, Geoffrey B., Systems and methods for processing content objects.
    상세보기
  212. Jones, Robert, Systems, compositions, and methods for full color laser engraving of ID documents.
    상세보기
  213. Jones, Robert L.; Bi, Daoshen; Yeh, Tung-Feng, Tamper evident adhesive and identification document including same.
    상세보기
  214. Jones, Robert L.; Kenen, Leo M., Three dimensional data storage.
    상세보기
  215. Goodman, David D., Two-way communication over a single transmission line between one or more information sources and a group of telephones, computers, and televisions.
    상세보기
  216. Geoffrey B. Rhoads, Video copy-control with plural embedded signals.
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  217. Rhoads Geoffrey B., Video steganography.
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  218. Rhoads,Geoffrey B., Video steganography.
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  219. Goodman, David D., Video transmission and control system utilizing internal telephone lines.
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  220. Hashimoto Shinichiro (Koganei JPX) Nagabushi Hiromi (Hino JPX), Voice band multiplex transmission system.
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  221. Geoffrey B. Rhoads ; Ravi K. Sharma, Watermark detection using a fourier mellin transform.
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  222. Rhoads, Geoffrey B., Watermark embedder and reader.
    상세보기
  223. Rhoads, Geoffrey B.; Gustafson, Ammon E., Watermark embedder and reader.
    상세보기
  224. Geoffrey B. Rhoads, Watermark enabled video objects.
    상세보기
  225. Rhoads,Geoffrey B.; Levy,Kenneth L.; McKinley,Tyler J., Watermark encoded video, and related methods.
    상세보기
  226. Geoffrey B. Rhoads, Watermark encoding method exploiting biases inherent in original signal.
    상세보기
  227. Evans, Douglas B.; Conwell, William Y., Watermark-based object linking and embedding.
    상세보기
  228. Rhoads, Geoffrey B., Watermarking methods and media.
    상세보기
  229. Rhoads, Geoffrey B., Wireless methods and devices employing plural-bit data derived from audio information.
    상세보기
  230. Rhoads, Geoffrey B., Wireless methods and devices employing plural-bit data derived from audio information.
    상세보기
  231. Rhoads, Geoffrey B., Wireless methods and devices employing steganography.
    상세보기
  232. Rhoads,Geoffrey B., Wireless methods and devices employing steganography.
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  233. Rhoads Geoffrey B., Wireless telephony with steganography.
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