Abstract: An audio selection circuit. The audio selection circuit includes a control/switch circuit having a first input, a second input, and a first output, and a signal detector module configured to detect an audio signal on the second input. If the signal detector detects presence of the audio signal on the second input, the signal detector is configured to transmit a control signal to the control/switch circuit, and the control/switch circuit is configured in response to the control signal to disconnect the first input from the first output and to connect the second input to the first output. Otherwise, the control/switch circuit is configured to connect the first input to the first output and to disconnect the second input from the first output.

Abstract: An apparatus for and method of distributing and reproducing infrared signals within a digital network is disclosed. The apparatus comprises a control unit for digitizing a received infrared signal command from a wireless remote and transmitting the digitized signal over the digital network. The apparatus also-comprises at least one transceiver device coupled to the network and identified by the control unit to receive the digitized signal and reproduce the infrared signal as originally received. The transceiver device can provide the reproduced infrared signal to at least one electronic device located within a vicinity of the transceiver device.

Abstract: A method for controlling presentation of data through a wireless home entertainment hub in a home entertainment system includes obtaining a registration for one or more source devices and for one or more sink devices. An indication is received at the wireless home entertainment hub that at least one of the source devices has become active. An instruction is transmitted to the sink devices to receive data from the at least one active source device. An indication is transmitted to at least one active source device that at least one of the sink devices is ready to receive data.

Abstract: The present disclosure provides an electronic device and a method for switching an audio input channel of the electronic device. The electronic device includes a headphone interface, a detection circuit, a signal processing unit, and a multiplexer. The headphone interface is operable to connect with an audio connector of a headphone. The detection circuit includes a headphone pin and a button pin. The detection circuit detects a level of a last pole of the audio connector, transfers the level of the last pole into a first level of the headphone pin and a second level of the button pin, and outputs the first level and the second level to the signal processing unit. The signal processing unit transmits commands to the multiplexer in response to the first level and the second level. The multiplexer switches the audio input channel of the electronic device based on the commands.

Abstract: An embodiment of an audio system comprises a speaker system configured to automatically change a coupling of an audio speaker from a first channel input to a second channel input if an external speaker is coupled to a first output. In embodiments of the invention, the speaker that connects to an audio source, such as an audio card of a personal computer (PC), automatically swaps channels based on the jack into which an external speaker is plugged. Thus, the reconfiguration of the audio system is automatic for the user in some embodiments, requiring nothing more from the user than selecting one of two jacks for use with an external speaker.

Abstract: An audio processing apparatus comprising: channel determination section for determining which one of a combination of the first left audio signal and the first right audio signal and a combination of the second left audio signal and the second right audio signal is included in multichannel audio data; and switching section for causing the first amplification section to amplify the first left audio signal and supply the amplified first left audio signal to the first speaker terminal and causing the second amplification section to amplify the first right audio signal and supply the amplified first right audio signal to the second speaker terminal when the combination of the first left audio signal and the first right audio signal is determined to be included; and causing the first amplification section to amplify the second left audio signal and supply the amplified second left audio signal to the third speaker terminal and causing the second amplification section to amplify the second right audio signal and su

Abstract: The invention provides an audio interface device and method to acquire audio signal from either an analog or digital microphone through a common connector. The audio interface comprises a connector, electrically connected with a microphone plugged thereinto, an analog readout circuit, acquiring an analog audio signal from an analog microphone, a digital readout circuit, acquiring a digital audio signal from a digital microphone, and a decision circuit, selectively connecting the analog or digital readout circuit to the connector to acquire the analog or digital audio signal respectively according to whether the microphone plugged into the connector is analog or digital.

Abstract: A guiding device controls the directivity of a sound that is reproduced from a speaker in accordance with an attribute of contents.

Abstract: A sound reproducing apparatus which can be relatively inexpensive as a whole and also be simple in construction with reduced wiring even in the case where many speakers are used. Pulse-width modulated (PWM) pulses are generated based on respective audio signals for multiple-channel speakers. PWM pulses are time-division multiplexed and amplified, and then output as digital driving signals. The multiple-channel speakers are selectively turned on/off such that the digital driving signals are supplied to the respective multiple-channel speakers of corresponding channels.

Abstract: A codec includes an output module for converting a digital input signal into an analog output signal. A controller module monitors a plurality of status conditions and asserts a mute signal for engaging an output mute switch based on a plurality of disconnect rules.

Abstract: Interlocking flag, indicating whether or not an interlocked display should be made, can be set in association with predetermined editing operators. When any of the operators is operated, a displayed screen on a display is switched over to a screen related to the operated operator, if the interlocking flag associated with the operated operator indicates flag-ON; if not, the display device may be used to perform another function. A plurality n of channels may be divided into a plurality of layers each consisting of predetermined number m channels. It is only necessary that a limited number of operators, e.g. faders, be provided to correspond to a single layer, i.e. m channels. Any of the layers is selected, and any of the operators is used for the selected layer. A set of stereo channels can be set across different layers so as to interlock with each other in response to editing operation of the operator.

Abstract: An IO3 that is a connecting node reads waveform data from respective regions, in a TL frame circulated in a first sub-network system, corresponding to transmission channels allocated to any node belonging to the first sub-network system and writes the read waveform data into the regions, in a TL frame circulated in a second sub-network system, corresponding to the same transmission channels, and reads waveform data from regions, in the TL frame circulated in the second sub-network system, corresponding to the transmission channels allocated to any node constituting the second sub-network system and writes the read waveform data into the regions, in the TL frame circulated in the first sub-network system, corresponding to the same transmission channels.

Abstract: The invention pertains to a modular inter-unit transmitter/receiver for a portable audio device such as an MP3 player, a handheld device for playback of audio signals, a telephone, etc. More particularly, the unit is configured for an audio player device to enable the player device for wireless transmission and reception of audio signals. In one aspect, a communication means connects the modular audio unit to the audio player device. The device further comprises a switch in which a user of the audio player device can select to play audio signals received from an inter-unit transmitter/receiver or from the audio player device. The switch further enables the user to select whether to play the audio signal on the audio player device or to play the audio signal while transmitting the signal to a compatible device.

Abstract: Disclosed herein is a communication system including a signal output apparatus for outputting a stream signal, and first and second communication apparatuses for performing wireless communication. The first communication apparatus includes, a communication processing section configured to perform wireless communication of the stream signal over a stream line with the second communication apparatus, a signal input section configured to input the stream signal outputted from the signal output apparatus, a voltage detection section configured to detect a voltage at the signal output apparatus, and a control section configured to perform a streaming process of transmitting the stream signal inputted from the signal output apparatus via the signal input section to the second communication apparatus over the stream line, and also perform operation control based on a result of the detection by the voltage detection section.

Abstract: An audio signal processing device includes multiple input reception units to which analog audio signals, on which watermark information indicating identification information is superimposed, are input, an extraction unit that is adapted to extract the identification information from each of the analog audio signals input to the multiple input reception units, and a display unit for performing display depending on the identification information extracted by the extraction unit in correspondence with the input reception unit to which the analog audio signal, from which the identification information is extracted, is input, or signal processing unit for performing signal processing depending on the identification information extracted by the extraction unit for the analog audio signal, from which the relevant identification information is extracted, and outputting the processed analog audio signal.

Abstract: An audio output device includes: a main unit including a terminal configured to connect an external speaker; a speaker unit configured to be detachably attached to the main unit while the terminal is covered with the speaker unit; and an amplification unit configured to amplify an audio signal so that the amplified audio signal is input to the terminal and the speaker unit.

Abstract: Characteristic amounts in each small region of audio signals transmitted in the working system and the standby system are extracted by characteristic amount calculators 6-1, 6-2. A characteristic amount comparator 7 compares the characteristic amounts and judges occurrence of fault of a fault. Characteristic amount difference calculators 9-1, 9-2, ?D? comparator 10, and faulty system judging unit 11 judges the system having a fault. Majority decision processor 12 and significance judging unit 13 enhance the reliability of the judgement. Delay difference of audio signals between systems is roughly detected by sub-sampling audio signals of two systems and comparing them, and then accurately detected without sub-sampling. Delay difference between audio signals is adjusted by the detected delay difference.

Abstract: A system and method is introduced to facilitate the handover process of performers who are using digital vinyl systems (DVS). A DVS may be connected to an existing audio setup during the playing of another performer without interrupting the other performer and without disconnecting any connections in the existing audio setup. When the DVS is connected and a handover process is required, a switch is activated to select the DVS as the current active device for use. A DVS may be disconnected from an existing audio setup without interrupting another performer. The system may be implemented as part of an audio device or as a separate stand alone device.

Abstract: A method and system for utilizing multiple speakers in a portable electronic device is disclosed. The method includes receiving an input at a user interface of a portable electronic device, switching a first and second speaker in a stereo configuration to a mono configuration by routing a first digital to analog converter (DAC) output to both the first and second speaker in response to the input and coupling a third speaker to a second DAC to receive a first audio signal that is responsive to the input. The system includes a first digital to analog converter coupled to a first speaker, a second DAC coupled to a second speaker, and a third speaker. The system further includes switching logic coupled to the first and second DACs. The switching logic is responsive to an input signal provided by a user interface of a portable device. In response to an input signal from the user interface, the switching logic couples the first and second speakers to the first DAC and the third speaker to the second DAC.

Abstract: Provided is an audio transmission system for use in environments having multiple televisions. An audio transmitter couples to a television via the television's audio output jack and frequency modulates the audio signal for transmission on a user selected channel. An audio receiver receives the frequency modulated audio signal and extracts the audio signal. The audio receiver may be charged in a charging station.

Abstract: Methods and systems for network addressable loudspeakers and audio play are presented. One or more network addressable loudspeakers are registered at a server. An end user selects a network addressable loudspeaker to output audio, and an audio file is streamed from an audio source to the selected network addressable loudspeaker.

Abstract: A sound reproducing system for use with multiple rooms includes a main control unit, and at least one secondary control unit. Thus, the respective automatic level control circuit maintains the voice signal output at a constant level, the respective power amplification circuit of the main control unit converts the voice signal into a larger voice signal, the volume control circuit of the respective secondary control unit converts the larger voice signal and the noise produced during transmission into a smaller voice signal, and the power amplification circuit of the respective secondary control unit converts the smaller voice signal into a larger voice signal output, thereby producing a voice signal output with a higher quality.

Abstract: A sound-source signal processing module is provided, wherein a first or a second sound-source signal connection is provided by a receiving port, and the first sound-source signal in a predetermined state is processed by an audio processing module, and the second sound-source signal is enabled to be output from a speaker via an audio processing module, in response to an enable signal of a switch module.

Abstract: Characteristic amounts in each small region of audio signals transmitted in the working system and the standby system are extracted by characteristic amount calculators 6-1, 6-2. A characteristic amount comparator 7 compares the characteristic amounts and judges occurrence of a fault. Characteristic amount difference calculators 9-1, 9-2, ?D? comparator 10, and faulty system judging unit 11 judges the system having a fault. Majority decision processor 12 and significance judging unit 13 enhance the reliability of the judgment. Delay difference of audio signals between systems is roughly detected by sub-sampling audio signals of two systems and comparing them, and then accurately detected without sub-sampling. Delay difference between audio signals is adjusted by the detected delay difference.

Abstract: The present invention may include a wireless AV transmission system to support wireless transmission of AV data from an AV source device to an AV sink device. Each sink device may be associated with an AV output component, for example, a speaker. The sink devices each may have a unique address in the system. During operation, AV data having a format corresponding to a wired data protocol may be modulated onto RF channels and broadcast to the AV sink device(s). Each AV sink device may identify portion(s) of the RF channels that contain data to be output at the sink device and any timing signals to be decoded to keep the sink devices synchronized. Each AV sink device may demodulate and decode its respective AV channel from within the RF broadcasts, synchronize operation to the timing references in the broadcast signal and output its respective AV channel data.

Abstract: A multi-channel output device for a multimedia device includes a plurality of reception ends, an amplifier having an input end and an output end, a plurality of sound output devices for outputting sound, a first switching unit coupled between the plurality of reception ends and the input end of the amplifier for coupling a reception end of the plurality of reception ends to the input end of the amplifier according to a control signal, a second switching unit coupled between the output end of the amplifier and the plurality of sound output devices for coupling the output end of the amplifier to a sound output device of the plurality of sound output devices according to the control signal, and a control unit coupled to the first switching unit and the second switching unit for outputting the control signal.

Abstract: An audio signal processing method and a broadcasting output apparatus using the audio signal processing method are provided. The audio signal processing method includes selecting an audio signal to be processed from among a plurality of audio signals in which the same audio data is compressed in different formats, when the plurality of audio signals are received; and processing the selected audio signal. Therefore, it is possible to select a high quality audio signal from among audio signals compressed in various audio formats and to provide a user with the high quality sound.

Abstract: A folding electronic device includes an operation unit, a display unit, a memory unit, a pair of speakers, a detection switch, and a switch. A plurality of information input keys are arranged on the operation unit. The display unit is integrated with the operation unit so as to be foldable, and displays at least image information. Sound source data is stored in the memory unit. A pair of speakers for a left channel and a right channel can be driven in a closed state in which the display unit is folded. The detection switch detects the open state in which the display unit is not folded or the closed state in which the display unit is folded. The switch switches paths through which the sound source data stored in the memory unit is output to the pair of speakers on the basis of an output from the detection switch.

Abstract: A wireless headphone device may include a receiver for receiving a wireless digital signal containing a plurality of digital audio streams combined with control codes according to a predetermined format, a manually operated selector switch for selecting one or more of the plurality of digital audio streams to be produced as audio for the user, and a decoder for extracting the selected audio streams from the received signal in accordance with the predetermined format and for responding to the control codes in the received signal to perform predetermined functions.

Abstract: A digital audio distribution network includes a plurality of nodes and at least one transmission line that interconnects the nodes to form the digital audio distribution network. A first node in the plurality of nodes receives a user command, encodes the user command, and sends the encoded user command and digital audio over the transmission line. A second node in the plurality of nodes receives the encoded user command and the digital audio over the transmission line.

Abstract: A user can assign different audio data streams to different output channels of a single audio card using substantially conventional APIs, device drivers, and Audio Codec Interfaces (ACIs). An Application Processing Unit (APU) sequences audio data streams in accordance with a user's output channel assignment.

Abstract: A VOX interface is provided that interfaces with at least two communication paths to two separate devices. One communication path may be to a first electronic device, such as a central monitoring station remote from the VOX interface, and another communication path may be to one or more remote devices, such as to one or more patient devices remote from the VOX interface. The VOX interface may determine which of the communication paths is sending a signal (such as an audio signal), and configure the VOX interface (via one or more switches) to pass the signal through. Specifically, the VOX interface may sense signals indicating the presence of audio from a central station audio bus and the patient station bus, may do some background noise filtering on the signals, and may pass these filtered values through a differentiator circuit to determine which bus presented the audio.

Abstract: The appliance comprises an audio port, which is usable as an interface for testing of the appliance. In a preferred embodiment, the appliance comprises stereo output ports, one port for a reception of digital test signals from a control computer and the other port for a transmission of digital signals from the appliance to the control computer. For the separation of the test signals and the audio signals a test adapter is used which is coupled between the appliance, the control computer and an amplifier for the audio signals. The test signals are modulated onto a carrier signal having a frequency of above 20 kHz, for example a frequency within the frequency range of 1-10 MHz. This allows a serial connection, which is compatible with the widely used RS232 link for set-top boxes.

Abstract: There is provided a method of redirecting an audio stream from a first audio endpoint to a second audio endpoint in a computer operating system. The method includes directing the audio stream from a client application through a first audio resource stack to the first audio endpoint; creating an audio endpoint bridge to provide a path for the audio stream from the first audio resource stack through a second audio resource stack connected to the second audio endpoint; and redirecting the audio stream to the second audio endpoint using the audio endpoint bridge. The audio endpoint bridge can be created by forming a bridging application so as to activate the second audio stack. The bridging application can be hooked into a Windows audio engine in the second audio resource stack. The bridge can be used to intercept an audio stream and remove noise from it. Additionally, a specific type of noise with sporadic intermittent spikes has been observed in this audio framework with certain Bluetooth headsets.

Abstract: A system is provided for receiving audio signals from a plurality of microphones and transferring the audio signals via a common composite signal channel to a receiving unit, such as a mixing console. The system has at least two satellite units, each having a microphone signal input, a composite signal channel input and summing means for summing a microphone signal and a composite signal. The system further has a master unit with a composite signal channel input, and signal converting means for converting said composite signal into a master signal, which is provided to the receiving unit via a master signal output. In the system, each satellite unit is connected to the common composite signal channel, such that the microphone signal received at the respective satellite unit, is added to the composite signal, which is fed to the master unit.

Abstract: A method and system for communicating audio, video, and/or control signals within a home entertainment system. A plurality of audio channels is communicated between a wireless transmitter and a wireless receiver. The wireless transmitter is located proximate to a speaker housing. In some embodiments the speaker housing also encloses a center channel loudspeaker. The center channel loudspeaker transmits an audio signal to a remote loudspeaker. An exemplary remote loudspeaker is a subwoofer loudspeaker. The subwoofer loudspeaker provides one or more received audio channels to one or more surround loudspeakers.

Abstract: A multi-accessory vehicle audio system is providing that includes a plurality of vehicle audio accessories, the vehicle audio accessories generating a corresponding plurality of audio signals; and an audio switching device. The audio switching device includes an input section for receiving the audio signals from the vehicle audio accessories, a switching section operatively coupled to the input section for receiving the audio signals, a controller operatively coupled to the input section for receiving the audio signals and operatively coupled to the switching section for providing control signals to control the switching section and to regulate the output of the audio signals from the switching section according to an instruction set, and an output section operatively coupled to the switching section for receiving the regulated audio signals outputted from the switching section.

Abstract: An amplifier device includes a plurality of input terminals for receiving input signals (e.g. audio signals), a main switch, which switches over the input terminals so as to select one input terminal, an analyzer, which analyzes the input signals at respective timings so as to determine whether or not each of the input signals corresponds to a playback signal, a storage for storing a plurality of determination results in connection with the input terminals, a controller for controlling the main switch to select the input terminal whose input signal is newly determined as the playback signal, and an amplifier for amplifying the input signal of the selected input terminal. The analyzer performs frequency analysis on the input signals so as to determine the input signal including a specific frequency component having a high intensity as noise not forming the playback signal.

Abstract: An apparatus and method for turning on/off a wireless display device, are provided. The apparatus includes a transmitter to receive image signals to be displayed on the wireless display device and to transmit the received image signals via wireless communication, and a receiver to receive the image signals transmitted from the transmitter and to display the image signals on a screen of the wireless display device. The transmitter and the receiver are turned on/off automatically in response to an on/off signal from a remote controller.

Abstract: Information on a use situation of a portable electronic apparatus possessed by a user is acquired from an illuminance sensor, a contact sensor, and a GPS portion as use situation-acquiring portions, and a volume of a sound outputted either to a speaker provided as an internal sound-outputting unit in the portable electronic apparatus or to an external sound-outputting unit such as a headphone is controlled in accordance with the acquired information. Thus, even when a plug of the headphone falls off from the portable electronic apparatus despite an intention of the user, an unpleasant sound is prevented from being outputted from the speaker to a circumference.

Abstract: An internet radio system which includes a network connecting unit for coupling to the internet. A storage unit stores a number of addresses of servers in the internet. A graphical user interface can select one of the servers with the network connecting unit links receiving multimedia data from a selected server. A display unit displays the graphical user interface and a processing unit renders the graphical user interface and processes the multimedia data where the processing unit controls the volume of the multimedia data during selection of the servers.

Abstract: A method and apparatus are provided for matching an output of an auxiliary signal transducer with a reference signal transducer where the auxiliary signal transducer and reference signal transducer receive audio signals from a common signal source along different respective signal paths. The method includes the steps of determining a signal amplitude output value provided by the auxiliary and by the reference transducers within each of a plurality of different frequency ranges in response to the audio signal received along the respective signal paths and adjusting the signal amplitude output value of the auxiliary transducer within at least some of the plurality of different frequency ranges based upon the respective signal amplitude output value of the reference transducer.

Abstract: Provided are a method and apparatus for providing an IP datacasting service in a digital broadcasting system. The method for providing the IP datacasting service in the digital broadcasting system includes: generating service configuration information indicating that the IP datacasting service is provided; packetizing data to be transmitted and generating IP packet data; formatting information related to a configuration of the IP packet data by using a predetermined protocol; and transmitting the service configuration information, the IP packet data, and the information related to the configuration of the IP packet data through separate channels, respectively. Accordingly, various information related to transmitted multimedia data is transmitted together with the multimedia data, so that an IP datacasting function for appropriately processing the multimedia data according to the type of the multimedia data is provided.

Abstract: A method and system for communicating audio signals between an input device and an output device via a network. The output device can include loudspeakers and headphones. In some embodiments an output device, for example a center channel speaker, transmits audio signals to other output devices. In some embodiments, the output device is coupled to, or combined with, a speaker stand or speaker bracket. The network can be wireless, wired, infrared, RF, and powerline.

Abstract: The illustrative embodiments provide a method and system for automatically muting a headphone. The headphone detects a sound external to the headphone. A volume threshold and a frequency threshold are received, wherein the volume threshold and the frequency threshold define a sound of interest. A determination is made as to whether the sound external to the headphone is the sound of interest. Responsive to a determination that the sound external to the headphone is the sound of interest, a signal is transmitted to automatically mute an active state of the headphone.

Abstract: The method and apparatus are provided for several audio signal processing apparatuses to share at least one audio output device. Several audio signals sent from the audio signal processing apparatuses are received. The DC levels of the audio signals are shifted to a predetermined value. One of the adjusted audio signals is then selected for signal-transmitting to the audio output device. Afterwards, the DC level of the selected audio signal is re-adjusted to the predetermined value.

Abstract: A audio codec includes a first analog to digital converter for producing a first one-bit data stream, a second one-bit data stream is received from a digital microphone. A selection module produces a one-bit output signal that is the first one-bit data stream when a selection signal is in a first state, and produces a the one-bit output signal that is the second one-bit data stream when the selection signal is in a second state. A decimation and filter module produces a down sampled signal based on the one-bit output signal.

Abstract: Herein disclosed is an audio signal processing apparatus comprising first audio signal processing means for processing an audio signal within a first process time; second audio signal processing means for processing the audio signal within a second process time which is different from the first process time; audio signal delaying means for delaying the audio signal in response to each of the first process time of the first audio signal processing means and the second process time of the second audio signal processing means; selecting means for selectively receiving the audio signals respectively processed by the first and second audio signal processing means; and audio signal outputting means for selectively outputting the audio signal selectively received by the selecting means and the audio signal delayed by the audio signal delaying means.

Abstract: This invention relates to a wireless digital transmission system for loudspeakers comprising: compression means for the file representing the digital audio signal of the “compact disc” type, a transmission device comprising means of converting this compressed signal into a series signal moving by packets going to a modulator circuit with phase quadrature and means of transmitting the signals exiting the modulator circuit with phase quadrature to the domestic network for feeding electricity; a receiving device comprising means of connecting to this domestic network and of extracting from the feed electrical signal, by a demodulator with phase quadrature, data packets moving the digital audio signal to convert it into a parallelized digital signal sent to a decompression circuit; means of converting the decompressed digital signals into an analog signal intended to feed a loudspeaker after adequate amplification.

Abstract: Audio source selection circuit (QW) for an audio signal processor with inputs for source signals (F1, F2, NA, NB) provided by at least one source (Q1, Q2), with a processing device (V) which forms pairs of signals from the source signals, with a settable source selection logic (Qs) to which the channels of the processing device (V) are applied, and with outputs coupled to signal outputs of the settable source selection logic (Qs) and each forming an output channel (Co1, Co2, Co3), the processing device (V) including an automatic audio mode setting device which generates suitable intermediate channels (Cz1, Cz2, Cz3, Cz4) from the source signals (F1, F2, NA, NB) according to a source- and application-related mode.