Samsung Electronics Co., Ltd.

University-Industry Cooperation Group of Kyung Hee University

Nam-guk Kim

Sang-hoon Chu

Cheol-hoon Park

Seung-Woo Lee

Kyu-Heon Kim

Gwang-Hoon Park

Doug-Young Suh

Tae-sung Park

Do-young Joung

Woo-Young Choi

Sung-Won Park

Jang-Won Lee

Ga-hyun Ryu

Su-Hyung Kim

Jun-Seo Lee

Hyun-surk Ryu

Woo-jong Park

Jung-han Kim

Gil-yoon Kim

Kyoung-whan Oh

Hee-jean Kim

Sung-won Park

Heung-Ki Lee

Gil-Yoon Kim

Kyung-Jin Ahn

Seung-Ryong Kook

Jin-won Choi

Jae-Yong Yang

Hae-Taek Jung

Hristov Stoev Youlian

Soo-young Choi

Yu-kun Kim

Provided are method and apparatus for transmitting and receiving a multimedia streaming service via a network. The method of providing a multimedia streaming service includes: dividing encoded data of a video including at least one of a two-dimensional (2D) video and a three-dimensional (3D) video into fragments; determining at least one of 3D signaling information for each fragment and relationship information to be used when the video refers to other videos; and continuously transmitting the fragments including the property information regarding the fragments and encoded video data.

Method for providing fragment-based multimedia streaming service and device for same, and method for receiving fragment-based multimedia streaming service and device for same

Methods and apparatus are provided for transmitting and receiving multimedia contents. A transmission characteristic relating to a section, from among a plurality of sections for transmitting data, where an initial transmission speed is high, is provided from a server. The multimedia contents are requested in consideration of the transmission characteristic. The multimedia contents are received from the server.

Method and apparatus for receiving multimedia contents

A method of operating a hard disk drive (HDD) on the basis of a predicted new defect in a disk associated with the HDD is disclosed. The method includes detecting defects in a magnetic surface of the disk, defining a plurality of clusters by grouping the detected defects using a hierarchical clustering algorithm, calculating a curve fit for each one of the plurality of clusters, predicting a new defect likely to occur in the magnetic surface of the disk on the basis of the calculated curve fit; and writing data to the disk on the basis of the new defect prediction.

Method operating hard disk drive on the basis of predicted defect using hierarchical clustering and curve fit

A disturbance compensation determination apparatus, a related method, a computer readable medium storing a computer program related to the method, and a disk drive comprising the apparatus are provided. The disturbance compensation determination apparatus includes a disturbance observer (DOB) receiving a control input signal and a servo output signal of a plant, wherein the DOB calculates and outputs a current estimated disturbance value. The apparatus also includes a disturbance evaluation unit selectively changing a current disturbance compensation (DC) mode, wherein selectively changing the current DC mode comprises evaluating an accumulated estimated disturbance value in accordance with a condition corresponding to the current DC mode. In addition, the apparatus includes a switching unit selectively providing the current estimated disturbance value to a control loop of the plant in accordance with the current DC mode as selectively changed by the disturbance evaluation unit.

Disturbance compensation determination apparatus, a related method, a computer-readable medium storing a computer program related to the method, and a disk drive comprising the apparatus

A packet forwarding system to transfer packets through a plurality of interfaces by reading out information for the packet forwarding beforehand includes a packet processor that organizes and processes data to be transferred into packets, a packet memory storing the organized packets, a plurality of interfaces respectively transferring the packets stored in the packet memory depending on destinations of the packets, and a packet forwarding manager managing an packet information to transfer the packets through the plurality of the interfaces, respectively, and to control transfer of the packets immediately through a corresponding interface of the plurality of the interfaces by reading out the packet information before the packet forwarding. Accordingly, the fast packet forwarding is realized by processing the packet information read and the actual packet forwarding in parallel.

Packet forwarding system capable of transferring packets fast through interfaces by reading out information beforehand for packet forwarding and method thereof

Provided are an apparatus and method for controlling a motor which compensates for a mechanical tolerance of the motor in a case where a feedback sampling frequency increases in order to more precisely control a brushless DC motor. The apparatus for compensating the mechanical tolerance of the brushless DC motor includes: a speed controller calculating a speed error that is a difference between a motor speed measured in control sections and a reference speed using a back electromotive force generated by the motor, and generating a motor control input signal using the speed error of the control section; a moving average calculator calculating a moving average value of the motor control input signals in a predetermined moving average section including recently generated motor control input signal whenever the motor control input signals are generated; and a motor driver generating an electric current for driving the motor corresponding to the moving average value.

Apparatus and method compensating mechanical tolerance of brushless direct current motor and related disk drive

A method used in a disk drive system for compensating a frequency component affecting servo control performance. The method includes detecting a frequency component affecting a servo control output in a disk drive/head during a manufacturing process and storing the detected frequency component in a nonvolatile memory device. A frequency component is read from a nonvolatile memory device corresponding to a selected head each time the disk drive is turned on by a user. A parameter value of a filter is determined by using a servo control circuit of the disk drive to suppress the read frequency component.

Disk drive adaptive resonance compensation method and apparatus

A method and apparatus to safely repress disturbances from being applied to a system from the surroundings in which the system is used. The method of adaptively repressing disturbances includes estimating frequency components of a disturbance applied to a system in a user environment; and optimizing parameter values determining characteristics of a disturbance compensating servo control loop including a disturbance observer, based on the estimated frequency components of the disturbance.

Adaptive disturbance repressing method and apparatus, and disk drive apparatus using the same

An apparatus, medium, and method to control a disk drive, and in particular, an apparatus, medium, and method controlling a disk drive to perform a seek mode at an optimum state with respect to an operational temperature. A seek servo control method considering temperature change in controlling a disk drive may includes determining a seek time considering a given seek length and operational temperature change in a seek mode, and generating position, velocity, and acceleration trajectories to move a transducer according to the determined seek time.

Apparatus, medium, and method with seek servo control considering temperature change

A method, medium, and apparatus controlling a hard disk drive, and particularly, embodiments include methods, media, and apparatuses compensating for torque variations with respect to temperature variations in a seek servo operation, compensating for differences between modeling torque constants, used for servo designing, and actual torque constants. The method includes controlling gain of a seek control loop to vary depending on a torque constant temperature compensation value corresponding to a measured temperature of the hard disk drive, the seek control loop generating a seek driving current to be applied to a voice coil in the seek mode.

Method, medium, and apparatus compensating for torque variations based on temperature

A seek servo control method and device for a disk drive device for performing seek servo control according to a variation in a power supply voltage for the disk drive. The seek servo control method includes: detecting a supply voltage for the disk drive; and adjusting a seek time according to a track seek length based on the detected supply voltage.

Seek servo control method for adapting to supply voltage variation and disk drive using the same

A method, medium, and apparatus controlling a hard disk drive, and more particularly, a method, medium, and apparatus controlling a track seek of a hard disk drive, where the hard disk drive compensates for a gain distortion and a phase delay caused by a notch filter and a VCM driver using a sinewave acceleration trajectory. According to the method of controlling a track seek of a hard disk drive, an ideal sinewave for obtaining a position y*(n), a velocity v*(n), and an acceleration a*(n), according to a sinewave acceleration trajectory, and a sinewave indicating a gain distortion and a phase delay may be integrated and a VCM driving current u(n) can be generated by the integrated sinewave for compensating for gain distortion and phase delay, compensating for a value C(j2&#x3c0;f) of the gain distortion and the phase delay caused by the notch filter and the VCM driver.

Method, medium, and apparatus controlling track seek in a recording and/or reproducing apparatus

A noise-resistive, burst-mode receiving apparatus including a voltage control signal generator for multiplying a frequency of a system clock signal and generating a voltage control signal having a level that corresponds to the multiplied frequency; a reset signal generator for delaying an irregular input signal in the unit of a packet, in response to the voltage control signal, performing an exclusive OR operation on the delayed and input signals, and outputting the result as a reset signal; a clock signal generator for generating a signal having a level that is changed at the middle point of each bit included in the packet as a recovered clock signal in response to the reset signal and the voltage control signal and outputting the recovered clock signal; and an output buffer for buffering the input signal and outputting the buffered signal as recovered data in response to the recovered clock signal.

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Anyang-si, South Korea

Nam-guk Kim