Apparatus and method for embedding and extracting information in analog signals using distributed signal features
Номер патента: EP1002388A1
Опубликовано: 24-05-2000
Автор(ы): Eric Metois, Joseph M. Winograd, Kanaan Jemili, Rade Petrovic
Принадлежит: Aris Technologies Inc
Опубликовано: 24-05-2000
Автор(ы): Eric Metois, Joseph M. Winograd, Kanaan Jemili, Rade Petrovic
Принадлежит: Aris Technologies Inc
Реферат: Apparatus and methods are provided for embedding or embedding digital data into an analog host or cover signal. A distributed signal feature of the cover signal in a particular domain (time, frequency or space) is calculated and compared with a set of predefined quantization values corresponding to an information symbol to be encoded. The amount of change required to modify the signal feature to the determined target quantization value is calculated and the cover signal is modified accordingly to so change the feature value over a predefined interval. Information symbols are extracted by the opposite process. In one embodiment, the predefined value is a short term autocorrelation value of the cover signal.
Image photographing apparatus and image photographing method for generating a synthesis image from a plurality of images
Номер патента: US09813615B2. Автор: Hee-chul Han,Tae-Hee Lee,Hyun-Seok Hong,Sung-Ho Lee,Jae-Gon Kim,Kyoung-Young Kim,Seung-ryong JEON,Stepan TULIAKOV. Владелец: SAMSUNG ELECTRONICS CO LTD. Дата публикации: 2017-11-07.