Abstract: Provided is a method for transmitting a file during a video call including steps of confirming a first bandwidth for file transmission when a file transmission event is generated during a video call; reducing video call data on the basis of the first bandwidth for file transmission; and transmitting the reduced video call data and the corresponding file data through a second bandwidth for the video call, with the first bandwidth being a partial area or an entire area of the second bandwidth.

Abstract: Provided is a method for transmitting a file during a video call including steps of confirming a first bandwidth for file transmission when a file transmission event is generated during a video call; reducing video call data on the basis of the first bandwidth for file transmission; and transmitting the reduced video call data and the corresponding file data through a second bandwidth for the video call, with the first bandwidth being a partial area or an entire area of the second bandwidth.

Abstract: A method and an apparatus perform a video call service. A transmission communication device provides information on a rotation angle of a video call image transmitted during a video call to a reception communication device corresponding to a counterpart of the video call. Then, the reception communication device renders the received video call image by using the information on the rotation angle of the received video call image, and displays a rendered video call image. Accordingly, an image of a counterpart of the video call can be normally provided during the video call.

Abstract: A terminal device includes a storage medium configured to store a first string and a second string relevant to the first string, a display configured to display the first string on a first screen and the second string on a second screen, and a controller configured to generate sentence-by-sentence matching information between the first string and the second string, and control the scroll of the first screen and the second screen based on the sentence-by-sentence matching information when a certain part of the first string or the second string is selected or a scroll control command for the first screen or the second screen is input. A method includes controlling a scroll of the second screen to allow a corresponding part of the second string matching with a certain part of the first string to be displayed on the second screen when the certain part is selected.

Abstract: A method of removing a signal from among received signals, the method including: filtering the received signals; detecting a time band of the filtered received signals where an energy value of the filtered received signals exceeds a reference energy value; and applying a gain value to one or more received signals, from among the received signals, in the detected time band.

Abstract: An apparatus and method are provided to output a received call with a volume adjusted to a reference level range in the etiquette call mode. In the method for providing the etiquette call mode of a mobile device, the apparatus determines whether the etiquette call mode is activated in a call mode. When the etiquette call mode is activated, the apparatus establishes a transmission gain to a given gain value and also establishes a reception gain to a specific gain value corresponding to a minimum receiving volume level. Then the apparatus amplifies a received call by means of the established reception gain, adjusts a volume of the amplified received call to a given reference level range, and outputs the adjusted received call through a speaker.

Abstract: A hearing test method and apparatus are provided for improving a measuring accuracy and a test speed in finding the auditory threshold that is the audibility limit of discriminating a sound. In the method, after outputting a test sound relevant to a selected test frequency and a selected test sound pressure, the apparatus determines whether a user hears the test sound, then the test sound pressure zone is divided into an auditory threshold presence region and an auditory threshold absence region according to the result of determination. Thereafter, the test sound pressure zone is redefined using the auditory threshold presence region and this process of hearing test is repeated using the redefined test sound pressure zone to finally determine an auditory threshold for the selected test frequency.

Abstract: A method of removing a signal from among received signals, the method including: filtering the received signals; detecting a time band of the filtered received signals where an energy value of the filtered received signals exceeds a reference energy value; and applying a gain value to one or more received signals, from among the received signals, in the detected time band.

Abstract: A method of removing a signal from among received signals, the method including: filtering the received signals; detecting a time band of the filtered received signals where an energy value of the filtered received signals exceeds a reference energy value; and applying a gain value to one or more received signals, from among the received signals, in the detected time band.

Abstract: An apparatus to perform sound processing in a virtual reality system includes a sound processing unit to process and produce sound output in sound areas divided into a focus area within a predetermined visual field and a non-focus area out of the predetermined visual field in a virtual reality space for sound sources; and a control unit to divide the sound areas into the focus area and the non-focus area, and to control the sound output of the sound processing unit such that a volume of sound in a first space is gradually decreased while a volume of sound in a second space is gradually increased when a space shift from the first space to the second space in the virtual reality space is detected.

Abstract: A receiver suppresses noise simultaneously using a noise suppressor and an automatic gain controller (AGC). The receiver divides a received signal into an audio period and a non-audio period, analyzes whether the noise characteristic of the non-audio period corresponds to a non-static noise or a static noise, and if the noise characteristic corresponds to the static noise, analyzes whether the static noise is caused by a network or a transmitter side terminal. In accordance with the analyzed noise characteristic, the noise suppressor firstly suppresses the noise by determining the noise suppressing intensity, and sends a signal, from which the noise has been firstly suppressed, to the AGC. The AGC secondly suppresses the noise included in the signal. In this case, the threshold value of the AGC is controlled in real time in accordance with the noise characteristic.

Abstract: A method of conducting a hearing test, and a device to perform the method, the method including configuring multiple test sound sets including multiple sound sources at each included audio frequency, wherein the sound sources, when sequentially arranged according to volume, have a uniform volume difference and a same frequency band, the uniform volume difference indicating a volume difference between neighboring sound sources, outputting the sound sources included in one of the multiple test sound sets, and determining and outputting a following test sound set according to a subject's input sound sources' number one or more times, and determining an auditory threshold of the subject regarding the audio frequency of the output test sound sets based on a result of the subject's input.

Abstract: An automatic gain controller and a method using the same are provided. The automatic gain controller and method analyze background noise by operating a microphone mounted in a mobile communication terminal and automatically control the gain of the signal part which is non-audible due to the background noise. Thus, a user may listen to music by using an earphone or a headphone connected to the mobile communication terminal in an environment with background noise. The method includes receiving an audio signal to be reproduced, receiving a background noise signal introduced through a microphone, controlling a gain of the audio signal by comparing the background noise signal and the audio signal and outputting the gain-controlled audio signal so that the user can listen to the gain-controlled audio signal.

Abstract: An apparatus and method are provided to output a received call with a volume adjusted to a reference level range in the etiquette call mode. In the method for providing the etiquette call mode of a mobile device, the apparatus determines whether the etiquette call mode is activated in a call mode. When the etiquette call mode is activated, the apparatus establishes a transmission gain to a given gain value and also establishes a reception gain to a specific gain value corresponding to a minimum receiving volume level. Then the apparatus amplifies a received call by means of the established reception gain, adjusts a volume of the amplified received call to a given reference level range, and outputs the adjusted received call through a speaker.

Abstract: A hearing test method and apparatus are provided for improving a measuring accuracy and a test speed in finding the auditory threshold that is the audibility limit of discriminating a sound. In the method, after outputting a test sound relevant to a selected test frequency and a selected test sound pressure, the apparatus determines whether a user hears the test sound, then the test sound pressure zone is divided into an auditory threshold presence region and an auditory threshold absence region according to the result of determination. Thereafter, the test sound pressure zone is redefined using the auditory threshold presence region and this process of hearing test is repeated using the redefined test sound pressure zone to finally determine an auditory threshold for the selected test frequency.

Abstract: An apparatus and method for generating a binaural beat for brainwave induction is provided. Upon receipt of a stereo audio signal, a decorrelator extracts a common component existing in common in both channels of the stereo audio signal, and outputs the remaining stereo components except for the extracted common component. A frequency shifter generates a common component in which the binaural beat is included, by shifting a frequency of the extracted common component. First and second mixers mix the common component in which the binaural beat is included, with the remaining stereo components.

Abstract: A method of removing a signal from among received signals, the method including: filtering the received signals; detecting a time band of the filtered received signals where an energy value of the filtered received signals exceeds a reference energy value; and applying a gain value to one or more received signals, from among the received signals, in the detected time band.

Abstract: The present invention relates to a photosensitive resin composition including a) an alkali-soluble acrylate resin, b) a cross-linking monomer having at least two ethylenic double bonds, and c) a phosphinoxide based photopolymerization initiator and an acridon based photopolymerization initiator; a preparation method thereof; and a dry film resist comprising the same.

Abstract: An apparatus and method for generating a binaural beat for brainwave induction is provided. Upon receipt of a stereo audio signal, a decorrelator extracts a common component existing in common in both channels of the stereo audio signal, and outputs the remaining stereo components except for the extracted common component. A frequency shifter generates a common component in which the binaural beat is included, by shifting a frequency of the extracted common component. First and second mixers mix the common component in which the binaural beat is included, with the remaining stereo components.

Abstract: A method of conducting a hearing test, and a device to perform the method, the method including configuring multiple test sound sets including multiple sound sources at each included audio frequency, wherein the sound sources, when sequentially arranged according to volume, have a uniform volume difference and a same frequency band, the uniform volume difference indicating a volume difference between neighboring sound sources, outputting the sound sources included in one of the multiple test sound sets, and determining and outputting a following test sound set according to a subject's input sound sources' number one or more times, and determining an auditory threshold of the subject regarding the audio frequency of the output test sound sets based on a result of the subject's input.