Abstract: A method of controlling a device that provides content is provided. The method includes receiving a control signal for controlling at least one item of content provided by the device; in response to receiving the control signal, capturing, at preset intervals, a screen of the device on which content is displayed; in response to the captured screen corresponding to a template screen, extracting content information from a preset area of the captured screen; and identifying the content displayed on the screen of the device, based on the extracted content information.

Abstract: Provided is a video processing device and method capable of managing a security level of content included in a video. The video processing method includes: receiving an identifier of a video and information about a security policy to be set to the video; receiving security information related to the security policy; preparing the video by using the received identifier of the video; and updating security information of the prepared video by using the received security information according to the security policy.

Abstract: Provided is a video processing device and method capable of enhancing security of content included in a video, the video processing device including: a loader configured to load an original video; an encoder configured to generate an encoded video including a header and a payload by encoding the loaded original video; and a security information inserter configured to insert security information comprising information about a reproduction right of the video into the header or the payload.

Abstract: A method of compensating audio frequency response characteristics of a portable sound system can be performed using acoustic characteristics of a user measured in real-time. The method of compensating the audio frequency response characteristics can be used by a portable sound system. The method includes generating an acoustic characteristics curve of a user based on a minimum perception level of a user with respect to audible audio frequency bandwidths, generating an acoustic compensation curve of the user based on the acoustic characteristics curve of the user and a predetermined frequency characteristics target curve, and compensating the audio frequency response characteristics of a sound based on the acoustic compensation curve of the user.

Abstract: A method of reproducing a virtual sound and an apparatus to reproduce a 2-channel virtual sound from a 5.1 channel (or 7.1 channel or more) sound using a two-channel speaker system. The method includes: generating a 2-channel virtual sound from a multi-channel sound, sensing a listener position with respect to two speakers, generating a listener position compensation value by calculating output levels and time delays of the two speakers with respect to the sensed listener position, and compensating output values of the generated 2-channel virtual sound based on the listener position compensation value.

Abstract: A method and an apparatus for compensating for nonlinear distortion are provided to divide audio signals reproduced in a nonlinear speaker system into linear and nonlinear components in a time domain and a frequency domain, and then generate inversely-corrected signals by means of an inverse filtering scheme, so that it is possible to further consider a variety of nonlinear distortion characteristics such as viscous damping and structural damping which have not been reflected in the conventional lumped parameter method, and thus to obtain better sound quality.

Abstract: A method and an apparatus to record an audio signal use a beam forming algorithm for at least two microphones. The method includes disposing a plurality of microphones at a plurality of predetermined locations to generate audio signals upon receiving a sound signal output from a sound source, forming a beam from the audio signals by adjusting a delay and a level of the audio signal of each of the plurality of microphones, and adjusting an angle and a width of the beam by a user.

Abstract: A method of compensating audio frequency response characteristics of a portable sound system can be performed using acoustic characteristics of a user measured in real-time. The method of compensating the audio frequency response characteristics can be used by a portable sound system. The method includes generating an acoustic characteristics curve of a user based on a minimum perception level of a user with respect to audible audio frequency bandwidths, generating an acoustic compensation curve of the user based on the acoustic characteristics curve of the user and a predetermined frequency characteristics target curve, and compensating the audio frequency response characteristics of a sound based on the acoustic compensation curve of the user.

Abstract: An earphone frequency characteristic compensating method and apparatus to compensate for a frequency response characteristic of earphones by selecting a target curve. The method includes measuring the frequency response characteristic of the earphones considering a frequency characteristic of an ear canal, extracting a filter coefficient by comparing the measured frequency response characteristic of the earphones with a frequency characteristic of a target curve, and compensating for the frequency response characteristic of the earphones based on the extracted filter coefficient.

Abstract: A method of reproducing a virtual sound and an apparatus to reproduce a 2-channel virtual sound from a 5.1 channel (or 7.1 channel or more) sound using a two-channel speaker system. The method includes: generating a 2-channel virtual sound from a multi-channel sound, sensing a listener position with respect to two speakers, generating a listener position compensation value by calculating output levels and time delays of the two speakers with respect to the sensed listener position, and compensating output values of the generated 2-channel virtual sound based on the listener position compensation value.

Abstract: An apparatus and method of encoding an audio signal and an apparatus and method of decoding an audio signal. The audio decoding method includes: generating an audio signal by decoding an input signal, and transforming an original waveform of the generated audio signal into a compensation waveform that is compensated for an acoustic resonance effect in the audio signal. Therefore, an audio signal having excellent sound quality without an amplified middle band can be heard via earphones, headphones, or a phone earpiece by using an inverse compensation waveform to compensate an ERP-DRP resonance effect, which is an acoustic resonance effect generated due to the structure of the human ear.

Abstract: An apparatus and method of reproducing a 2-channel virtual sound while dynamically controlling a sweet spot and crosstalk cancellation are disclosed. The method includes: receiving broadband signals, setting compensation filter coefficients according to response characteristics of bands and setting stereophonic transfer functions according to spectrum analysis; down mixing an input multi-channel signal into two channel signals by adding head related transfer functions (HRTFs) measured in a near-field and a far-field to the input multi-channel signal, canceling crosstalk of the down mixed signals on the basis of compensation filter coefficients calculated using the set stereophonic transfer functions, and compensating levels and phases of the crosstalk cancelled signals on the basis of the set compensation filter coefficients for each of the bands.

Abstract: A method and an apparatus for compensating for nonlinear distortion are provided to divide audio signals reproduced in a nonlinear speaker system into linear and nonlinear components in a time domain and a frequency domain, and then generate inversely-corrected signals by means of an inverse filtering scheme, so that it is possible to further consider a variety of nonlinear distortion characteristics such as viscous damping and structural damping which have not been reflected in the conventional lumped parameter method, and thus to obtain better sound quality.

Abstract: A rotary compressor includes a motor which rotates a crankshaft about an axis. The crankshaft includes an eccentric portion disposed in a cylinder which has a fluid inlet and a fluid outlet. A roller is mounted on the eccentric portion to be orbited within the cylinder when the crankshaft rotates, for compressing fluid. The eccentric portion and roller are together movable radially with respect to the axis in response to centrifugal force, so that the roller maintains tight contact with the cylinder.