Electronics and Telecommunications Research Institute

Korea Telecommunication Authority

Kwang Roh Park

Sangsung Choi

Jae Doo Huh

Sang Wook Park

Kyu Min Kang

Sang Sung Choi

Jong Hyun Jang

Bub Joo Kang

Young Ae Jeon

Ho Jin Park

Mi Kyong Han

Jong Won Kim

Jae Young Kim

Kyeong Deok Moon

Jae Wook Shin

Dong Kyoo Kim

Sang In Cho

Byoung Hak Kim

Hyun Chul Kang

Tae In Hwang

Noh-Sam Park

Eui Hyun Paik

Chunglae Cho

Cheol Ho Shin

Mi Ryong Park

Hae Ryong Lee

Noh Sam Park

Dong Hee Kim

Yoon Seok Nam

Yeon Ju Oh

Hyoung Su Kim

Kyung Shik Lim

Eun Jin Ko

Kyung Ho Chae

Ji Eun Kim

Hoon Ki Lee

Ji Yeon Kim

Cheol-Ho Shin

Jun Hee Park

Sung Woo Choi

Wan Ki Park

Eun Chang Choi

Jeong Goo Lee

Chae Kyu Kim

Jae-Doo Huh

Youn Kwae Jeong

Joon Hak Bang

Young Sung Son

Hyun Woo Oh

Byeong Thaek Oh

Sang Jae Lee

Sangjae Lee

Chang-Sic Choi

Intark Han

Yong Ae Jeon

Deock Gu Jee

Sung-Woo Park

Young Jin Kang

Seong-hee Lee

Jae Kwan Yun

Eun Chang Chol

Moo Hoo Cho

Sun Ho Min

Disclosed are a method and an apparatus for generating metadata of immersive media and disclosed also are an apparatus and a method for transmitting metadata related information. The apparatus includes: at least one of a camera module photographing or capturing the image; a gyro module sensing horizontality; a global positioning sensor (GPS) module calculating a position by receiving a satellite signal; and an audio module recording audio; and a network module receiving sensor effect information from a sensor aggregator through a wireless communication network; and an application generating metadata by performing timer-synchronization of an image photographed based on the camera module, a sensor effect collected by using the gyro module or the GPS module, or audio collected based on the audio module.

Method and apparatus for generating metadata of immersive media

An image encoding method using a Binary Partition Tree (BPT) includes performing the BPT on a reference frame, detecting blocks, each having a difference in a pixel value exceeding a threshold value in a current frame, based on a result of the BPT of the reference frame, and performing the BPT of the current frame on the detected blocks. In accordance with the present invention, block partition is not applied to all frames, but a partial partition method based on a difference between the pixel values of a reference frame and a current frame to be encoded is provided. Accordingly, the encoding speed within the P frame or the B frame can be improved. Furthermore, the PSNR of a corresponding frame can be maintained within a specific range of the PSNR of a reference frame, and a compression effect can be improved.

Image encoding method using binary partition tree

The present invention relates to an image encoding method using an adaptive preprocessing scheme, including loading an input image for each frame, determining an encoding type of each of the frames, determining the size of a block to be encoded in each frame according to the determined encoding type, determining blocks that can be replicated from the blocks having the determined size and performing an intra-picture replication preprocessing or inter-picture replication preprocessing procedure on the determined blocks according to the encoding types of the frames, and encoding the frames on which the preprocessing procedure has been performed.

Image encoding method using adaptive preprocessing scheme

There is provided a method for estimating a position of a mobile node in a wireless sensor network. The method includes estimating a frequency offset between anchor nodes and estimating a difference between times when ranging frames from a mobile node are received by two anchor node, without use of a separate synchronization unit, such as a network synchronized clock supply unit that supplies a network synchronized clock via a cable, in a wireless sensor network, unlike a conventional method of estimating Time of Flight (TOF) using Two-Way Ranging (TWR) and Symmetric Double Sided-TWR (SDS-TWR) schemes. The estimated receiving time difference is directly applied to a Time Difference Of Arrival (TDOA) algorithm in order to estimate the position of the mobile node.

Method of estimating position of mobile node in wireless sensor network

A system for realistically reproducing multimedia content includes a realistic multimedia content producer for providing the multimedia content; a device metadata server for providing device metadata for realistically reproducing the multimedia content; and a realistic multimedia reproducing apparatus for downloading the device metadata for the multimedia content from the device metadata server, and applying device metadata selected by a user to thereby reproduce the multimedia content. Further, a method for realistically reproducing multimedia content includes downloading multimedia content to be reproduced realistically; checking if the multimedia content includes device metadata for realistic reproduction; downloading a plurality of device metadata for realistic reproduction of the multimedia content if the multimedia content does not include the device metadata; and reproducing realistically the multimedia content by controlling a reproducing device to which metadata selected by a user from the plurality of device metadata are applied.

System for realistically reproducing multimedia content and method thereof

The present invention relates to a method of estimating the position of a mobile node in a wireless sensor network using a passive mode OWR method. The method includes: estimating frequency offsets of anchor nodes and a mobile node; allowing the anchor nodes to sequentially transmit ranging frames; allowing the mobile node to receive the ranging frames and to estimate the difference between the reception times of signals from two anchor nodes; and applying the estimated difference between the reception times of the signals to time difference of arrival (TDOA) to estimate the position of the mobile node. According to the above-mentioned structure of the present invention, a plurality of mobile nodes can estimate their positions with a minimum number of ranging frame transmissions, without using a separate network synchronization unit. In addition, it is possible to easily construct a wireless sensor network for position recognition, and rapidly and accurately perform distance estimate using an OWR method.

Provided are a multimedia play apparatus and method. The multimedia play apparatus and method enable synchronization between an audio and a video through existing multimedia play time information, and even in a multimedia service that simultaneously provides multimedia and a message, the multimedia play apparatus and method enable synchronization between multimedia and a message that occurs by terminal characteristics between different environments and different users on the basis of existing multimedia play time information and multimedia meaning information. Moreover, by performing synchronization between multimedia and a message on the basis of the multimedia meaning information, the multimedia play apparatus and method can prevent the damage of a multimedia service that provides multimedia and a message together because of a spoiler corresponding to a malicious message.

Multimedia play apparatus and method

An FIR filter of a DS-CDMA UWB modem transmitter and a control method thereof are disclosed. The FIR filter includes an LUT control device for outputting a resultant value of '0' to all adders if data values corresponding to upper three chips HMand Land lower three chips H, M and L are '000000', and discriminating which group between a first group and a second group the upper/lower data values belong to if the upper/lower data values are not&#x201c;000000&#x201d;. The LUT control device provides upper or lower LUT values to the adders using the upper or lower LUT values as they are, or converts the upper or lower LUT values into 2's complements and provides the converted values to the adders according to the discriminated first or second group.

FIR filter of DS-CDMA UWB modem transmitter and control method thereof

An apparatus for transmitting WPAN (Wireless Personal Area Network) MAC (Medium Access Control) frames includes a transport frame management unit for creating MAC transport frames if data is generated from an upper protocol and application layer unit, classifying the created MAC transport frames by kinds, and managing the classified MAC transport frames by queues, a transport memory control unit for transmitting the transport frames at a high speed, and a transport frame transmission unit for responsible for the transmission of the transport frames by judging the transmission time of the frames.

Apparatus for transmitting WPAN MAC frames and method thereof

Provided are a channel equalization and carrier recovery method and a receiving apparatus thereof. In the method, a receiver of the high speed wireless communication system obtains an initial value of a channel equalization coefficient through non-causal channel estimation in a frequency domain during a preamble transmission section of a packet. High-order QAM signal correction for updating the channel equalization coefficient in a time domain is performed during a data transmission section of the packet. when a payload section starts in the data transmission section of the packet, channel equalization coefficient tracking is performed on the basis of frequency domain decision, and a hard decision of a correction value by the high-order QAM signal correction in the time domain is made to correct carrier phase errors, so that the channel equalization coefficient is updated.

Channel equalization and carrier recovery method and receiver in high speed wireless communication system

Provided are a system for channel sounding of broadband single carrier mobile communications and a method thereof. A channel sounding device is provided, which achieves precise modeling of a broadband mobile communication in a 5 GHz band. The channel sounding device can perform precise channel modeling by collecting broadband channel data of 20 MHz between a base station and a mobile station moving at maximum 150 km/h, using a sounding signal including a 802.15.3 preamble, a maximum length sequence (MLS) signal, and a single carrier frequency domain equalization (SC-FDE) symbol overcoming a limitation of signal distortion of an orthogonal frequency division multiplexing (OFDM) signal. The channel sounding device can simultaneously perform modeling of interference of an adjacent channel as well as a transmission channel.

System for channel sounding of broadband signal carrier mobile communications and method thereof

Provided are a multimedia playing system and a method for playing multimedia using the system. The system includes a first multimedia player, a second multimedia player, and a user interface. The first multimedia player includes a first media controller controlling plays of a first video and a first audio in response to multimedia data received from an external device. The second multimedia player includes a second media controller operating independently of the first multimedia player and controlling plays of second video in response to the multimedia data. The user interface transmits synchronization information to the first and second media controller.

Multimedia playing system and method for playing multimedia using the same

A communication apparatus generates a digital detection signal including a plurality of time symbols by digital-converting a detection signal corresponding to a received signal, estimates an average power value of the detection signal by calculating average power of the digital detection signal based on the digital detection signal, and performs UWB communication through a predetermined first channel when a predetermined reference power value is greater than the average power value.

Apparatus and method for communication

Provided are a routing table generating method, a data transmission method, and a routing route formation method for multi-hop communication in high rate wireless personal networks. In a high rate WPAN environment including a plurality of piconets, a piconet controller (PNC), which performs a topology server function to provide the optimal route, collects link state information from the PNCs or DEVs (devices) belonging to a sub-tree that serves as a root and applies a minimum cost algorithm based on the collected link state information to calculate the optimal route for all pairs of originations and destinations existing within the sub-tree in consideration of QoS. The optimal route information is transmitted to the origination PNC via the destination PNC/DEV. During performing this, the optimal route between the pairs of originations and destinations is set.

Routing table generation, data transmission and routing route formation method for multi-hop services in high rate wireless personal networks

A SMMD media producing apparatus includes: a pre-processor for extracting first media data and produces MXF media data with adjusted resolution using media data of an MXF format; and a neo-data producer for extracting second media data from the MXF media data with the adjusted resolution and produces neo-data to be added to the extracted second media data. The apparatus further includes a media publisher for producing SMMD media data using the neo-data produced by the neo-data producer and the first media data.

SMMD media producing and reproducing apparatus

Growing community of inventors

Daejeon, South Korea

Kwang Roh Park