Electronics and Telecommunications Research Institute

Kookmin University

Hidea Solutions Co., Ltd.

Kai Media Co.

Korea Advanced Institute of Science and Technology

Samsung Sds Co., Ltd.

Hanon Systems

Joo Young Lee

Jin Soo Choi

Jin Woong Kim

Sung Hoon Kim

Dong Wook Kang

Kyeong Hoon Jung

Suk Jin Hong

Jin Suk Kwak

Young Soo Kim

Sang Su Lee

Youn Hee Gil

Keon Woo Kim

Sung Kyong Un

Woo Yong Choi

Su Hyung Jo

Hyun Sook Cho

Do Won Hong

Hyon Gon Choo

Min Suk Lee

Se Yoon Jeong

Hyo Jin Yoon

Joo Hee Lee

Ji Hoon Cho

Duk Jae Moon

Seong Kwang Kim

Jin Cheol Ha

Hui Yong Kim

Eun Kyung Kim

Young Min Kim

Jong Soo Jang

Sung Won Sohn

Soo Cheol Jeong

Soon Heung Jung

Eun Gi Son

Ki Young Moon

Ju Han Kim

Myung Seok Ki

Seong Gyu Gong

Won Seok Choi

Hyung In Choi

Min Cheol Son

Yong Ha Son

Byeong Hak Lee

A variable displacement swash plate type compressor control method and a variable displacement swash plate type compressor controlled thereby may include a first determination step of determining whether liquid refrigerant exists within the variable displacement swash plate type compressor; a first operation step of applying power to the field coil assembly and of not applying current to the electronic control valve, when it is determined in the first determination step S1 that the liquid refrigerant exists; a second determination step of comparing an elapsed period of time of operating in the first operation step with a predetermined reference time; and a second operation step of maintaining the power applied in the first operation step to the field coil assembly and applying current to the electronic control valve when the elapsed period of time is greater than or equal to the reference time.

Variable displacement swash plate type compressor and control method

A method for generating a key stream according to an embodiment includes generating r round keys that are each N-dimensional integer vectors including elements of an integer setdefined based on a prime number t, based on a random bit string, an encryption counter, and a secret key that is an N-dimensional integer vector consisting of elements of the integer set, generating a first round output vector xby performing a modular addition operation on an initial vector and a first round key RKof the r round keys with the prime number t as a modulus, and generating a key stream that is an N-dimensional integer vector consisting of elements of the integer setfrom the first round output vector xby using a second to r-th round keys of the r round keys, and one or more first round functions and a second round function.

Method and apparatus for generating key stream

A method for encryption according to an embodiment includes generating a ciphertext for a secret key that is an integer vector by using an integer-based first homomorphic encryption algorithm, generating a key stream that is the integer vector from a nonce and the secret key by using a key stream generator, encoding the key stream by using a message encoding function of the first homomorphic encryption algorithm, encoding a message that is a real vector by using a message encoding function of a real number-based second homomorphic encryption algorithm, generating a ciphertext for the message by using a result of the encoding of the key stream and a result of the encoding of the message, and transmitting the nonce, the ciphertext for the secret key, and the ciphertext for the message to an apparatus for converting a ciphertext.

Apparatus and method for encryption, apparatus and method for converting ciphertext

Disclosed is a method and apparatus for encoding/decoding an image. The image encoding apparatus according to an embodiment of the present disclosure may include: an encoding level decision unit determining an encoding level of an input image; a sampling unit outputting an encoding target picture associated with the encoding level determined in the encoding level decision unit; an encoding unit encoding the encoding target picture output from the sampling unit; a reference picture storage unit storing at least one reference picture; and a reconstructed image generation unit generating a reconstructed image corresponding to the input image in association with the encoding level determined in the encoding level decision unit.

Method and apparatus for image encoding and decoding

Provided is an apparatus and method for reproducing a three-dimensional (3D) image. A 3D image reproduction apparatus may include an image selector configured to select a left-eye image and a right-eye image based on a broadcast standard of a broadcast stream, and an image outputter configured to output the 3D image by synthesizing and output the left-eye image and the right-eye image in a 3D image format.

Apparatus and method for reproducing 3D image

Disclosed are a method and apparatus for providing a three-dimensional (3D) broadcast service using images with asymmetric aspect ratios and a method and apparatus for reproducing a 3D broadcast service. The method of providing the 3D broadcast service includes adjusting a second viewpoint image to be composed with a first viewpoint image into a 3D form with respect to the first viewpoint image and the second viewpoint image for 3D broadcasting, encoding the first viewpoint image and the adjusted second viewpoint image, and generating a broadcast stream of the first viewpoint image and a broadcast stream of the second viewpoint image by multiplexing the first viewpoint image and the second viewpoint image.

3D broadcast service providing method and apparatus, and 3D broadcast service reproduction method and apparatus for using image of asymmetric aspect ratio

An apparatus and a method for synchronizing left and right streams in a stationary/mobile hybrid 3DTV are disclosed. The apparatus according to an exemplary embodiment may synchronize content streams corresponding to left and right images using a timestamp pairing mode, a timestamp offset mode, and a network time protocol (NTP) synchronization mode.

Apparatus and method for providing content for synchronizing left/right streams in fixed/mobile convergence 3DTV, and apparatus and method for playing content

Provided is a video providing method and a video playing method for a three-dimensional (3D) video, and an apparatus for performing the methods. The video providing method may transmit a reconstruction mode for reconstructing a low-resolution additional video having lower resolution than a high-resolution reference video.

Apparatus and method for providing image, and apparatus and method for playing image

A boundary information providing apparatus may include a boundary information generation unit to generate boundary information of a video, the boundary information through which a switching point between a 2D video and a 3D video is recognized, based on a switching mode between the 2D video and the 3D video, and a stream transmission unit to transmit a stream including the boundary information to a video receiving apparatus.

Apparatus and method for 3D content broadcasting with boundary information

A content providing apparatus and method, and a content reproduction apparatus and method for accessing a content stream in a hybrid three-dimensional television (3DTV) are disclosed. The content providing apparatus may include a content stream generation unit to generate a first content stream corresponding to a reference image and a second content stream corresponding to a supplementary image, a descriptor generation unit to generate a descriptor associated with the first content stream and the second content stream, and a data transmission unit to transmit the first content stream, the second content stream, and the descriptor to a content reproduction apparatus.

Device and method for providing content by accessing content stream in hybrid 3D TV, and device and method for reproducing content

A similarity calculating method and apparatus are disclosed. A similarity calculating method according to an exemplary embodiment of the present invention includes extracting similarity calculating data, which is determined in advance, by receiving a communication activity record for every user; modeling a communication activity pattern for every user and common information between the users based on the extracted similarity calculating data; and calculating a similarity between users using the modeled communication activity pattern for every user and common information. The modeling includes: modeling the communication activity pattern by calculating a value of a static feature from the similarity calculating data, and modeling the common information by calculating a value of a dynamic feature from the similarity calculating data.

Similarity calculating method and apparatus

Proposed is a data visualizing apparatus for visualizing data as effectual information using a correlation between forensic data collected from various sources. The proposed data visualizing apparatus may visualize, as effectual information, single-source single-data, single-source multi-data, and multi-source multi-data.

Apparatus and method for visualizing data

Provided is a forensic index method by distributed processing, including: generating data to be divided by dividing data to be indexed according to predetermined division setting for distributed processing; allocating the generated data to be divided to a plurality of data processing units according to the predetermined division setting, extracting an index by filtering the allocated data to be divided in the plurality of data processing units, and generating divided index data including the extracted index; and generating an index database by merging the generated divided index data.

Forensic index method and apparatus by distributed processing

A system and method for data analysis and digital forensics is provided. The system for data analysis and digital forensics may include: an online data forensic server for collecting and analyzing usage history information from an object device, which is subject to data collection, downloading and collecting data on the Internet based on the usage history information, requesting issuance of a timestamp token for the collected data, and receiving the issued timestamp token; a timestamp token issuing server for issuing the timestamp token for the collected data in response to the request for issuance of the timestamp token and proving the issued timestamp token to the online data forensic server; and a storage device for storing the collected data.

Method for data analysis and digital forensics and system using the same

Provided are a method and an apparatus for managing online and offline documents using RFID technology. The method includes: pre-registering online and offline documents using radio frequency identification tag information stored in at least one of the online and offline documents to be output; determining whether the pre-registered online and offline documents are authorized to be output; and if it is determined that the pre-registered online and offline documents are authorized to be output, generating documents of the online and offline documents to be output and storing new radio frequency identification tag information in radio frequency identification tags attached to the documents to be output.

Method and apparatus for managing online and offline documents with RFID technology

Growing community of inventors

Daejeon, South Korea

Joo Young Lee