Samsung Electronics Co., Ltd.

Soo-Yong Kim

Su-Hwan Kim

Young-Hoon Lee

Seok-Min Yun

Hui-Jung Kim

Tae-Sung Kim

Jae-Hyun Ahn

Dong-Han Lee

Jin-yong Chung

Yong-ha Hwang

Ji-Myung Na

Hyeong-Seok Jeong

In-ju Jang

Seung-Ick Cho

Jeong-Yeol Bae

A method and an apparatus are provided for transmitting audio data. The method includes setting a connection with a plurality of slave devices by using a short range wireless communication protocol, generating a data packet comprising the audio data, and repetitively transmitting the data packet to the plurality of slave devices through a multicast/broadcast channel a number of times.

Method and apparatus for communicating audio data

A transceiver and a method operating the transceiver are provided. The transceiver includes a first communication module configured to receive a first signal based on a first communication scheme; a second communication module configured to receive a second signal based on a second communication scheme; a reception module having a low-power circuit configured to detect a signal in a frequency band which can be used by the first communication module and the second communication module; and a controller configured to establish channels for the first communication module or the second communication module based on a strength of the signal detected by the reception module.

Transceiver and operation method thereof

A method and electronic device for receiving information is provided. The method includes transmitting, by the electronic device, a scan time and an identification of the information to cause the identified information to be broadcast at the scan time; and scanning, by the electronic device, during the scan time to receive the information. The electronic device includes a transmitter configured to transmit a scan time and an identification of the information to cause the identified information to be broadcast at the scan time; and a scanner configured to scan during the scan time to receive the information.

Method and apparatus for activating scan function

A servo control system and method is provided, comprising: a controller outputting a parameter control signal; a device having a parameter controlled based on the parameter control signal; a sensing circuit sensing the parameter of the device and generating a parameter error signal; a sinusoidal signal generator generating a sinusoidal signal; and a adder combining the parameter error signal and the sinusoidal signal, wherein the controller includes a servo equalizer that equalizes the added parameter error signal and the sinusoidal signal to output an equalized parameter control signal to adjust the parameter.

Reduced noise servo control

A signal processing apparatus of an optical disk recording/reproducing apparatus and a signal processing method performed thereby are provided. The signal processing apparatus may include an operational data generation unit for receiving digital signals, filtering received digital signals and outputting filtered signals as operational data and a data arithmetic-operation unit for performing an arithmetic operation on the operational data output by the operational data generation unit in response to a command.

Apparatus and method of processing signals of an optical disk recording/reproducing apparatus

A method and apparatus for controlling a light source for use with an optical disc having optimum power values for different stages in a writing signal for the optical disc, includes comparing current operational characteristics of the light source to previous operational characteristics, and, when the current operational characteristics differ from the previous operational characteristics and a stage in the writing signal has overlapping power, determining a compensation voltage based on the current operational characteristics and an optimum power value for that stage.

Apparatus and method for controlling a recording light signal

An apparatus and method for controlling a recording signal are provided. The apparatus may include a light generator generating light used to write information to an optical disk, a light amount compensator setting a voltage level of the recording signal as a second level when the write operation is performed or stopped, and a light amount controller supplying energy to the light generator based on the second level of the recording signal until the voltage level of the recording signal reaches a first level when a rewrite operation is started and controlling the light generated by the light generator to be constant after the voltage level of the recording signal reaches the first level. The apparatus and method for controlling the recording signal may reduce write quality deterioration due to a lack of initial power of the recording signal when an optical disk recording apparatus starts a rewrite operation after stopping a write operation due to buffer underrun, insecure servo signals, wobble quality, contamination of discs, changes in recording speeds, and/or external shocks.

Apparatus and method for controlling recording signals

A step motor control circuit that does not fix a reference voltage of a step motor control signal. The step motor control circuit may include a digital-to-analog (DAC) signal generator configured to generate first and second DAC signals in response to a step motor error signal, a gain adjust block configured to control gains of the first and second DAC signals in response to a control signal and output first and second step motor control signals, and a gain controller configured to output the control signal in response to a mode signal and a gain control signal, in which the first and second step motor control signals are pulse trains including a reference voltage, and the reference voltage may be a fixed voltage when the mode signal indicates a normal mode and the reference voltage may be a variable voltage when the mode signal indicates a power consumption reduction mode.

Step motor control circuit and method of generating step motor control signal

An ADIP (address in pre-groove) signal detection circuit is capable of correctly and quickly detecting discontinuous points in a wobble signal, and has a simple configuration in a wobble detection system of an optical disc device such as a DVD+R/RW, and an ADIP signal detection method thereof. The ADIP signal detection circuit performing the ADIP signal detection method includes one or two window comparators, two edge detection circuits each consisting of an exclusive OR circuit and an AND circuit, and two discontinuous point determination circuits each consisting of a flip-flop and a counter. Therefore, the ADIP signal detection circuit has a simple configuration so that it can be easily implemented. Also, since the ADIP signal detection circuit has a fast operation speed, the ADIP signal detection circuit detects discontinuous points correctly and quickly.

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Suwon-si, South Korea

Soo-Yong Kim