Abstract: A power supply apparatus and an electronic apparatus are provided. The power supply apparatus includes: a plurality of power supplies arranged as a single array; a switch disposed between the plurality of power supplies configured to control connection states of the plurality of power supplies; and a controller configured to control the switch to connect the plurality of power supplies in parallel when a first event requiring a voltage less than a predetermined reference voltage occurs, and configured control the switch to connect the plurality of power supplies in series when a second event requiring a voltage exceeding the predetermined reference voltage occurs.

Abstract: A switching amplifier is provided. The switching amplifier includes an input unit configured to receive an audio signal, a first switching element and a second switching element configured to switch and output the received audio signal, a first regulator configured to vary and provide a voltage input to the first switching element so that the first switching element is not turned on in an operation area of the second switching element, and a second regulator configured to vary and provide a voltage input to the second switching element so that the second switching element is not turned on in an operation area of the first switching element. In addition, the first switching element and the second switching element are a depletion type transistor.

Abstract: An audio output apparatus and a method for audio correction is provided. An audio correction method of an audio output apparatus may include receiving a test signal from a terminal device, generating correction filter information of the terminal device based on the received test signal and a standard signal of the terminal device, and in response to an audio signal being received from the terminal device, correcting the received audio signal based on the correction filter information.

Abstract: An audio output apparatus and a method are provided, which includes calculating a temperature value of a voice coil of the audio output apparatus using a heat transfer model algorithm, in response to power being supplied to the voice coil; adjusting an output level of an audio signal by determining a gain value to adjust the output level of the audio signal according to the calculated voice coil temperature value, and outputting the audio signal with the adjusted output level.

Abstract: An electronic device includes an amplifier which is configured to amplify a sound signal and includes a vacuum tube including a heater configured to heat the vacuum tube; a voltage supply which is configured to supply a first voltage and a second voltage which is higher than the first voltage; and a controller which is configured to control the voltage supply to supply the second voltage to the heater in response to supply of a drive voltage to the amplifier being started and to supply the first voltage to the heater if the vacuum tube reaches a predetermined temperature.

Abstract: An audio signal processing apparatus and method for processing an audio signal are provided. The audio signal processing apparatus includes a signal detector configured to detect a long-term envelope and a short-term envelope of a lower range signal of an input signal, and a controller configured to control a gain in a beat section of the input signal, wherein the beat section is determined based on the detected long-term envelope and the short-term envelope of the lower range signal.

Abstract: A switching amplifier is provided. The switching amplifier includes an input unit configured to receive an audio signal, a first switching element and a second switching element configured to switch and output the received audio signal, a first regulator configured to vary and provide a voltage input to the first switching element so that the first switching element is not turned on in an operation area of the second switching element, and a second regulator configured to vary and provide a voltage input to the second switching element so that the second switching element is not turned on in an operation area of the first switching element. In addition, the first switching element and the second switching element are a depletion type transistor.

Abstract: An audio output apparatus and a method for audio correction is provided. An audio correction method of an audio output apparatus may include receiving a test signal from a terminal device, generating correction filter information of the terminal device based on the received test signal and a standard signal of the terminal device, and in response to an audio signal being received from the terminal device, correcting the received audio signal based on the correction filter information.

Abstract: An audio system, and an audio apparatus and a channel mapping method thereof are provided. The audio apparatus includes a interface configured to receive a plurality of test tone signals from each of a plurality of sound output apparatuses configured to output multichannel audio signals, a channel determiner configured to analyze the plurality of test tone signals determine locations of the plurality of sound output apparatuses, and generate a determination result based on the determined locations, an switch configured to output one test tone to each of the plurality of sound output apparatuses, and perform channel mapping to map channels through which the multichannel audio signals are output according to the determination result, and an output unit configured to be randomly connected to the plurality of sound output apparatuses, and output the multichannel audio signals by adjusting the random connection according to the channel mapping.

Abstract: A power supply apparatus and an electronic apparatus are provided. The power supply apparatus includes: a plurality of power supplies arranged as a single array; a switch disposed between the plurality of power supplies configured to control connection states of the plurality of power supplies; and a controller configured to control the switch to connect the plurality of power supplies in parallel when a first event requiring a voltage less than a predetermined reference voltage occurs, and configured control the switch to connect the plurality of power supplies in series when a second event requiring a voltage exceeding the predetermined reference voltage occurs.

Abstract: An audio output apparatus and a method are provided, which includes calculating a temperature value of a voice coil of the audio output apparatus using a heat transfer model algorithm, in response to power being supplied to the voice coil; adjusting an output level of an audio signal by determining a gain value to adjust the output level of the audio signal according to the calculated voice coil temperature value, and outputting the audio signal with the adjusted output level.

Abstract: A sound output device is provided. The sound output device includes a vacuum tube for amplifying an audio signal; a power supply that supplies power to the vacuum tube; a first switch circuit that selectively connects the power supply to the vacuum tube; and a controller that controls the first switch circuit according to whether the vacuum tube is used.

Abstract: An audio signal processing apparatus and method for processing an audio signal are provided. The audio signal processing apparatus includes a signal detector configured to detect a long-term envelope and a short-term envelope of a lower range signal of an input signal, and a controller configured to control a gain in a beat section of the input signal, wherein the beat section is determined based on the detected long-term envelope and the short-term envelope of the lower range signal.

Abstract: An electronic device includes an amplifier which is configured to amplify a sound signal and includes a vacuum tube including a heater configured to heat the vacuum tube; a voltage supply which is configured to supply a first voltage and a second voltage which is higher than the first voltage; and a controller which is configured to control the voltage supply to supply the second voltage to the heater in response to supply of a drive voltage to the amplifier being started and to supply the first voltage to the heater if the vacuum tube reaches a predetermined temperature.

Abstract: A docking station for docking of a plurality of portable media devices includes a main body, a plurality of accommodation units to accommodate the plurality of portable media devices, the plurality of accommodation units being provided in one side of the main body, and a plurality of docking ports to provide electrical connection between the plurality of portable media devices and the docking station, the plurality of docking ports being installed in the plurality of accommodation units, wherein each of the plurality of docking ports supports electrical connection between the docking station and any one of the plurality of portable media devices belonging to different product groups. Accordingly, a plurality of portable media devices belonging to different product groups is freely connected to one docking station to reproduce a sound signal, thereby improving user convenience.

Abstract: An audio output apparatus and a method for outputting audio are provided. The audio output apparatus includes a receiver which receives a multi-channel audio signal that includes channels; an amplifier which amplifies the received multi-channel audio signal for each channel; and an audio output which includes speakers that output the channels of the amplified multi-channel audio signal, respectively.

Abstract: A sound output device is provided. The sound output device includes a vacuum tube for amplifying an audio signal; a power supply that supplies power to the vacuum tube; a first switch circuit that selectively connects the power supply to the vacuum tube; and a controller that controls the first switch circuit according to whether the vacuum tube is used.

Abstract: An electronic device and a method to control an output thereof are provided. The electronic device includes a controller to control whether to output non-encrypted multimedia data to an external device based on whether the external device is communicatively connected to the electronic device, and an interface to output the non-encrypted multimedia data to the external device under the control of the controller.

Abstract: A video line connection apparatus for adaptively connecting external input/output lines, the apparatus capable of flexibly selecting an output by responding to the external line which is connected to an input jack. The apparatus includes: a plurality of composite video input jacks; a plurality of Y/C separated video input jacks; at least one composite video output jack; at least one Y/C separated video output jack; a first multiplexer; a second multiplexer; a third multiplexer; a luminance/chrominance signal separating unit; an on-screen path control unit; a chrominance signal path control unit; and a control unit. The apparatus offers convenience to the user and dispels the user's uneasiness caused by improper connection of video lines.