Samsung Electronics Co., Ltd.

Seoul National University

Jin-hee Jeong

Yong-sik Kwon

Hak-Ju Lee

Jung-jin Kim

Hae-joo Jeong

Yong-Sik Kwon

Kum-ran Ji

Hong-Sil Jeong

Jae-Yoel Kim

Hyun-Koo Yang

Jung-pil Yu

Joon-soo Kim

Sung-ryul Yun

Se-Ho Myung

Jong-hun Kim

Kum-Ran Ji

Chan-sub Park

Eui-Jun Park

Yong-deok Chang

June-Hee Lee

Sung-il Park

Ga-hyun Ryu

Jong-hwa Kim

Kyo-shin Choo

Jae-hyon Kim

Seho Myung

Sung-Jin Park

Jongho Lee

Provided are a magnetic resonance imaging (MRI) apparatus and method for obtaining a plurality of MR images having different contrasts by using a single pulse sequence. The MRI apparatus includes a controller configured to control a pulse sequence of one cycle to be applied to a plurality of slices of an object, wherein the one cycle includes a first obtaining section during which a first inversion radio frequency (RF) pulse is applied to a first slice of the object and a second obtaining section during which a second inversion RF pulse is applied to a second slice of the object adjacent to the first slice, and to sequentially obtain a first MR signal for capturing a first MR image of the first slice, a second MR signal for capturing at least one second MR image of the second slice adjacent to the first slice, and a third MR signal for capturing at least one third MR image of the first slice, during the first obtaining section.

Magnetic resonance imaging (MRI) apparatus and method of obtaining magnetic resonance image

Provided are a digital broadcast transmitter, a digital broadcast receiver, a method for processing a stream of the transmitter, and a method for processing a stream of the receiver. The method of processing the stream of the transmitter includes: generating a stream in which a plurality of slots of different formats is consecutively arranged; and encoding and interleaving the generated stream, and outputting the encoded and interleaved stream as a transport stream, wherein the generating the stream includes arranging at least one of second mobile data, training data, and dummy data in an orphan region generated according to a difference of the formats between consecutive slots of the plurality of slots.

Digital broadcast transmitter, digital broadcast receiver, and method for constructing and processing streams for same

Provided are a digital broadcast transmitter, a digital broadcast receiver, a stream-processing method for the digital broadcasting transmitter, and a stream-processing method for the digital broadcast receiver. The stream-processing method for the digital broadcasting transmitter includes: configuring a stream in which slots including a plurality of blocks are continuously disposed; and encoding and interleaving the stream to be output as a transport stream, wherein the configuring the stream includes, if slots of a block extension mode 00 are continuously placed, connecting known data placed in predetermined locations of adjacent slots to each other in order to generate a long training sequence.

Digital broadcasting transmitter, digital broadcasting receiver, and stream configuration and method for processing same

The method for transporting a digital broadcast stream includes: receiving a transport stream, including mobile broadcast data that is placed in at least a part of a normal data area allocated to normal data and signaling data that includes an FIC chunk header with a variable length; decoding the signaling data; and decoding the mobile data using the decoded signaling data.

Digital broadcasting transmitter, digital broadcasting receiver, and methods for configuring and processing a stream for same

Disclosed is a method of processing a stream of a digital broadcasting receiver. The method comprises: arranging at least one of new mobile data and known data in at least a portion of an existing mobile data region and in at least a portion of a normal data region, in a stream which includes the normal data region and the existing mobile data region; and composing a transmission stream where at least one of the new mobile data and the known data is arranged, and wherein the arranging combines a block of data arranged in the existing mobile data region and a block of the new mobile data in the stream, and performs serially concatenated convolution code (SCCC) coding on the combined blocks.

Digital broadcasting transmitter, digital broadcasting receiver, and method for composing and processing streams thereof

A method for transmitting encoded data, which improves a diversity effect in a communication system, including generating parity bits for an information word, generating a codeword by encoding an information word using the generated parity bits, puncturing some of the parity bits of the codeword, transmitting a frame including the information word, and generating additional parity bits for decoding the information word and transmitting the additional parity bits in one or more other frames.

Method and apparatus for transmitting and receiving data in a communication system

A method for processing a stream of a digital broadcast transmitter, the digital broadcast transmitter, a method of processing a stream of a digital broadcast receiver, and the digital broadcast receiver are provided. The method includes: configuring a stream including a slot to which mobile data is allocated; and encoding and interleaving the configured stream and outputting the encoded and interleaved stream. Each slot of the stream includes signaling data, and the signaling data includes a slot indicator indicating a type of a slot, and may include at least one of a backward training indicator and a forward training indicator according to a value of the slot indicator. Accordingly, information on an adjacent slot is efficiently used.

Digital broadcast transmitter, digital broadcast receiver, and methods for configuring and processing streams thereof

A method is provided for channel encoding in a communication system using a Low-Density Parity Check (LDPC) code. The method includes grouping information bits into a plurality of groups; determining an order of the plurality of groups to be shortened, based on a ratio of a number of bits to be shortened to a number of bits to be punctured; determining a length of an information word to be obtained by shortening the plurality of groups; shortening the plurality of groups on a group basis in the determined order based on the determined length of the information word; and LDPC-encoding a shortened information word.

Method and apparatus for channel encoding and decoding in a communication system using a low-density parity check code

A method of processing a digital broadcasting signal includes generating a transport stream including a plurality of transport packets; selecting one of the transport packets as a starting packet to be mapped into a first data segment of an encoded data frame; and constructing deterministic data frames in the transport stream beginning with the starting packet; wherein at least one of the 52 transport packets does not have an adaptation field; wherein all remaining ones of the 52 transport packets do have an adaptation field; and wherein the at least one transport packet that does not have an adaptation field is provided at a fixed location in each of the slices.

Method of and apparatus for transmitting digital broadcasting signal in advanced-VSB (A-VSB) system in which transport packet without adaptation field is provided at fixed location in data field slices

A method and apparatus are provided for generating a parity check matrix used to generate a linear block code in a communication system. The method includes determining a basic parameter of a second parity check matrix satisfying a rule predetermined with respect to a given first parity check matrix, generating a submatrix corresponding to a parity part of the second parity check matrix, using the basic parameter; and generating a submatrix corresponding to an information word part of the second parity check matrix, using the first parity check matrix and the basic parameter.

Apparatus and method for generating a parity check matrix in a communication system using linear block codes, and a transmission/reception apparatus and method using the same

A method of resetting a trellis-coded modulation (TCM) encoder to a known state, the TCM encoder including a reset input that resets the TCM encoder to the known state when held at a reset level for a plurality of symbol clock cycles, the method including identifying an event to occur in the future that requires the TCM encoder to be reset to the known state; and holding the reset input of the TCM encoder at the reset level beginning the plurality of clock symbol cycles before a time the event will occur so that the TCM encoder will be reset to the known state immediately before the event occurs.

Advanced-VSB system (A-VSB)

A channel estimation apparatus in a digital communication system includes: a correlation unit for obtaining a correlation function of a first received signal by correlating a received synchronizing signal and a reference synchronizing signal, and obtaining a correlation function of the received synchronizing signal by a correlation between the synchronizing signals, a first estimating unit for estimating a first multi-path by applying a first threshold value to the correlation function of the first received signal, a correlation noise removing unit for obtaining a correlation function of a second received signal by removing correlation noise included in the correlation function of the first received signal, by a first multi-path, and a second estimating unit for estimating a second multi-path by applying a second threshold value to a correlation function of the second received signal in which the correlation noise has been removed.

Channel estimation apparatus and method in digital communication system

A digital communication system having an improved equalization performance according to a channel state and a method for operating the system are disclosed. The digital communication system includes: a channel state judging section; and an equalizing section for compensating for a channel distortion of the inputted signal by initializing a parameter on the basis of the judged channel state. The channel state judging section includes: a channel prediction section for predicting the channel state of the inputted signal by using the field sync; an N number of buffers for storing the state information regarding the N number of channels predicted by means of the N number of the field syncs; a calculating section for calculating a difference between the state information regarding the N number of channels stored in the N number of buffers; and a judging section for judging the channel state on the basis of the calculated difference.

Digital communication system and method for operating the system which can improve equalization performance according to channel state

A channel equalizer for a single-carrier receiver interacting with a Trellis decoder and a channel equalization method therefor. The channel equalizer includes a first equalizer having a first feed forward (FF) unit for eliminating a pre-ghost of an input signal and a first feedback (FB) unit for eliminating a post-ghost of the input signal, a Trellis decoder for Trellis-decoding an output signal of the first equalizer, and a second equalizer having a second FF unit for eliminating the pre-ghost of the input signal and a second FB unit for eliminating the post-ghost of the input signal based on a signal decoded by the Trellis decoder. The first and second equalizers, interacting with the Trellis decoder, enable the equalization performance and speed of the channel equalizer to be enhanced.

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Yongin-si, South Korea

Jin-hee Jeong