Seoul, South Korea
Seoul, South Korea

SK Telecom Co., Ltd. is a South Korean wireless telecommunications operator, controlled by the SK Group, one of the country's largest chaebols.SK Telecom is a provider of mobile service, with 50.5% share of the South Korean market as of 2008. Since its establishment on March 29, 1984, the company has evolved from a first generation analog cellular system, to second generation CDMA, then to the world's first third-generation synchronized IMT-2000 cellular system. SK Telecom also became the world’s first carrier to commercialize HSDPA in May 2006.The company’s current services include NATE, a wired and wireless integrated multi-Internet service, June, a multimedia service, MONETA, a financial service, Telematic service such as NATE Drive and even Digital Home service. In 2004, SK Telecom launched Hanbyul, the world’s first DMB satellite. SK Telecom's subsidiary TU Media provides satellite DMB. SK Telecom also offers a variety of internet services, many through its subsidiary SK Communications. Cyworld is one of the most popular blogging services in South Korea and NateOn is one of the most popular instant messengers. Wikipedia.


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The present disclosure relates to a method for transmitting content between terminals through a service control device link. To this end, A method for content delivery between devices through interworking with a service control apparatus, the method performed by a device, the method comprising: creating a neighboring device list containing connectable neighboring devices by searching for the connectable neighboring devices; transmitting, to the service control apparatus via a network, the created neighboring device list and a domain query message for content; receiving, from the service control apparatus and as a response to the transmitted domain query message, information on a content providing device for providing the content among the connectable neighboring devices contained in the neighboring device list; and requesting and receiving the content from the content providing device.


Patent
SK Telecom | Date: 2017-01-09

A video decoding apparatus includes: a decoder to determine a size of a minimum block unit among block units in which quantization parameter information is decoded from a bitstream, determine a current block to be decoded by dividing a block larger than 1616 into one or more blocks, decode, from the bitstream, a skip information and the motion information for deriving the motion vector of the current block without decoding information on residual signals of the current block, and decode, from the bitstream, prediction information of the current block and quantized transform coefficients of the current block; and a video reconstructor to determine the motion vector of the current block using the decoded motion information, reconstruct residual signals from the quantized transform coefficients by inversely quantizing the quantized transform coefficients using a quantization parameter, and reconstruct the current block based on the prediction information and the reconstructed residual signals.


A video encoding method for encoding a current motion vector of a current block, includes: deriving a plurality of candidate predictive motion vectors by using motion vectors of adjacent blocks of the current block; selecting a predictive motion vector of the current block from among the candidate predictive motion vectors; generating a differential motion vector by subtracting the predictive motion vector from the current motion vector; and encoding, into a bitstream, the differential motion vector and a predictive motion vector index for indicating which candidate predictive motion vector is selected as the predictive motion vector among the candidate predictive motion vectors, where the deriving of the candidate predictive motion vectors includes: deriving a first candidate predictive motion vector based on adjacent blocks located at left side of the current block; and deriving a second candidate predictive motion vector based on adjacent blocks located at upper side of the current block.


The present invention provides a method for non-invasively detecting, expecting, or diagnosing fetal single nucleotide polymorphisms and the resultant monogenic disorders, through maternal cell-free DNA sequencing. The diagnosis method according to the present invention does not harm mothers or fetuses and is convenient, in that analysis is possible using maternal blood samples; and can be favorably used for a prenatal diagnosis method capable of determining at an early stage whether single nucleotide polymorphisms causing monogenic disorders occur or not.


The present invention relates to a method for transmitting content between terminals through a service control device link, and to a method for transmitting content between terminals through a service control device link, capable of supporting content transmission between terminals through a service control device link including a domain name server function. To this end, a method for transmitting content between terminals through a service control device link according to one embodiment of the present invention comprises the steps of: searching for at least one connectible adjacent terminal and creating an adjacent terminal list by a terminal; transmitting, by the terminal, the adjacent terminal list and a domain inquiry message for content to a service control device; receiving, from the service control device by the terminal, information on a content provider terminal capable of providing content among adjacent terminals included in the adjacent terminal list as a response to the domain inquiry message; and making a request for content to the content provider terminal and receiving content by the terminal.


The present disclosure relates to a method and apparatus for encoding/decoding a motion vector and a method and apparatus for encoding/decoding video using same. The motion vector encoding method includes selecting a predicted motion vector candidate set including one or more predicted motion vector candidates for a block; determining one or more search ranges for predicted motion vector candidate set; selecting one predicted motion vector candidate among one or more predicted motion vector candidates as predicted motion vector for each search point with respect to each search point within search range by first determination criterion prearranged with video decoding apparatus; selecting one predicted motion vector among the predicted motion vectors for each search point by a second determination criterion not prearranged with the video decoding apparatus, and determining predicted motion vector, differential motion vector, and current motion vector; and generating and encoding the differential motion vector as motion information.


An apparatus for encoding images includes: a predictor to determine a prediction unit (PU) mode among a plurality of PU modes indicating types of partition of a current coding unit (CU) into one or more prediction units (PUs), and generate a predicted block of the current CU by performing an intra prediction or an inter prediction for each PU of the determined PU mode, wherein a size of the current CU is 2NN, and the plurality of PU modes includes 2NhN or hNN PU mode in which the current CU is partitioned into PUs respectively having a size of 2NhN or hNN, h being a fractional number smaller than 1; a subtractor to subtract the predicted block from the current CU to generate a residual block; a transformer to transform the residual block into a frequency domain to generate a frequency one or more transform blocks.


An apparatus for encoding images includes: a predictor to determine a prediction unit (PU) mode among a plurality of PU modes indicating types of partition of a current coding unit (CU) into one or more prediction units (PUs), and generate a predicted block of the current CU by performing an intra prediction or an inter prediction for each PU of the determined PU mode, wherein a size of the current CU is 2N2N, and the plurality of PU modes includes 2NhN or hN2N PU mode in which the current CU is partitioned into PUs respectively having a size of 2NhN or hN2N, h being a fractional number smaller than 1; a subtractor to subtract the predicted block from the current CU to generate a residual block; a transformer to transform the residual block into a frequency domain to generate a frequency one or more transform blocks.


The present disclosure in some embodiments provides an apparatus and method for supplying quantum keys to multiple apparatuses in a quantum key distribution system. According to some embodiments of the present disclosure, an apparatus and method for supplying quantum keys enable Alice or Bob to deliver the quantum keys to the multiple transmitting apparatuses or receiving apparatuses, in real time without a delay.


An ion trap device is disclosed with a method of manufacturing thereof including a substrate, first and second RF electrode rails, first and second DC electrodes on either upper or lower side of substrate, and a laser penetration passage connected to ion trapping zone from outer side of the first or second side of substrate. The substrate includes ion trapping zone in space defined by first and second sides of substrate separated by a distance with reference to width direction of ion trap device. The first and second RF electrode rails are arranged in parallel longitudinally of ion trap device. The first RF electrode is arranged on upper side of first side, the second DC electrode is arranged on lower side of first side, the first DC electrode is arranged on upper side of second side, and the second RF electrode rail is arranged on lower side of second side.

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