Abstract: A pre-out terminal that outputs a left outside audio signal can be fixed and an increase of the number of DACs is prevented. In the case that a surround back left audio signal SBL and a left outside audio signal LW are included, the signal SBL is amplified and output to a surround back left SP terminal 14a through a switch S13a. The signal LW is amplified and output to a left outside SP terminal 14b through a switch S13c. The signal LW is supplied from a DAC 11b to a left outside pre-out terminal 11d through a switch S11c. At this point, in order to supply the signal LW to the left outside pre-out terminal 11d, a DAC 11c is not used, but the DAC 11b is used. Accordingly, the DAC 11c can be used for another signal (ex., ZONE2) to decrease the number of DACs.

Abstract: A method and system for removing noise due to bias electric power (MIC_Bias) or Time Division Multiple Access (TDMA) noise are provided. The system includes an interface with a microphone contact, for connecting to an accessory, an Analog-to-Digital (AD) converter for converting an analog voltage level, input via the microphone contact, into a digital voltage level, an audio processing unit for processing an audio signal input via the microphone contact, a switch for at least one of connecting and disconnecting the microphone contact and the AD converter, and a controller. The controller compares the digital voltage level with voltage levels stored in a look up table. The controller identifies a type of accessory connected to the interface. The controller also switches off the switch to prevent noise from being introduced into the audio signal via a wire connecting the microphone contact and the AD converter.

Abstract: An audio interruption and buffering playback system includes a primary audio source for reproducing primary audio content and a secondary audio source for reproducing secondary audio content. A processing device detects an interruption event that includes the secondary audio source reproducing secondary audio content having priority over the primary audio source. The processor mutes the output of the primary audio content in response to the interruption event. A buffer buffers the audio content from the primary audio source during the interruption event. The buffered audio content is reproduced by the processor to the user at an accelerated playback speed following the interruption event.

Abstract: Apparatus is provided for processing a switched audio signal output received from a crosspoint router having a plurality of inputs and a plurality of outputs, there being a control signal that defines which of the plurality of inputs is to be routed by the crosspoint router to which of the plurality of outputs. A control unit receives the control signal and serves to identify a route change in the control signal. An instantaneous value of the switched audio signal prior to the route change is stored. A signal processing unit then combines the stored value with values of the switched audio signal after the route change to form a processed audio signal that changes smoothly.

Abstract: Herein provided is a method for acoustical switching suitable for use with a microphone enabled electronic device. The method includes capturing a first microphone signal from a first microphone on a device, analyzing the first microphone signal for a contact event versus a non-contact event, and directing the electronic device to switch a processing state responsive to detection of either the contact event or non-contact event. In another configuration, additional microphone can be added for performing coherence analysis between at least two microphone signals mounted on or in the device. At least one parameter settings of the device can be changed in response to at least one detected physical contact on the device. Other embodiments are disclosed.

Abstract: Systems, methods, apparatus, and articles of manufacture to provide for low-latency delivery and playback of audio are disclosed. In one embodiment, an example audio system includes multiple playback devices including a primary device and one or more secondary devices, whereby, the primary device establishes and controls a peer-to-peer network that connects, wirelessly or wired, to each of the satellite devices. An example audio device contains a channel selector, a control interface, and an audio interface. In some embodiments the control interface is used to transmit control information to another device on a first frequency channel, and the audio interface is used to transmit audio information to another device on a second frequency channel.

Abstract: An audio interface self-adaption device includes an audio interface, a first level comparison module, a second level comparison module, a PNP triode Tc, a power output terminal VBAT, a switching module, a resistor R2a, and a resistor R2b. The audio interface includes a pin 1, a pin 2, a pin 3, and a pin 4. One of the pin 3 and the pin 4 is a microphone pin of the audio interface, and the other one of the pin 3 and the pin 4 is a ground pin. The switching module is configured to connect one of a first input pin B0L and a second input pin B1H of the switching module to an output pin of the switching module according to a level of a signal received by a signal input pin Sel of the switching module.

Abstract: An audio control circuit receives analog audio signals and digital audio signals via an audio signal input interface. The audio control circuit includes an audio codec chip, a first control circuit, a first switch circuit, a second control circuit, and a second switch circuit. The first control circuit obtains the analog audio signals from the audio signal input interface and converts the analog audio signals into first control signals to control the first switch circuit turned on and off. The second control circuit obtains the digital audio signals from the audio signal input interface and converts the digital audio signals into second control signals to control the second switch circuit turned on and off. The audio codec chip receives the analog audio signals in response to the first switch turned on and receives the digital audio signals in response to the second switch turned on.

Abstract: An earphone plug with a mode switching function is presented. The earphone plug includes a terminal and a switching device. The terminal has a plurality of electrodes to transmit signals. The switching device is combined with the terminal, and is capable of switching between a first mode and a second mode, and part of the electrodes of the terminal are electrically connected together, so as to achieve mode switching to perform processing on different transmission signals.

Abstract: A method, apparatus, and computer readable medium for mixing a plurality of audio signals within an audio mixing system are disclosed. The method comprises receiving a plurality of audio signals, extracting at least one audio feature from each of the plurality of audio signals, determining, for each of the audio signals, an associated processing control function in accordance with a plurality of the extracted audio features, processing each audio signal in accordance with each associated processing control function, and outputting the plurality of processed audio signals.

Abstract: An adaptive method and device of an audio interface and an electronic signature token are provided. The audio interface comprises a first pin and a second pin, and the method comprises: not implementing an identification operation on the first pin and the second pin of the audio interface when an absolute value of a voltage difference between the first pin and the second pin is less than a first threshold; determining a type of each of the first pin and the second pin according to a sign of the voltage difference between the first pin and the second pin when the absolute value of the voltage difference is greater than or equal to a second threshold, in which the second threshold is greater than or equal to the first threshold; and connecting the identified ground pin to a common ground.

Abstract: In some embodiments, a media device is configured so that it automatically causes a first predetermined channel to be displayed on an output device when a user sends a request signal to the media device to turn the output device off. The media device may be configured so that it causes the output device to shut off after the first predetermined channel has been on for a dwell period of time after the request signal has been received. The dwell period of time may be approximately two seconds. In some embodiments, a media device is configured so that it automatically causes a first predetermined channel to be displayed on an output device when a user sends a request signal to the media device to turn the output device on. In some embodiments, the media device is a television device. In other embodiments, the media device is a radio device.

Abstract: This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. In an example, the accessory detection device can include a comparator and a switch. The comparator can be configured to receive mobile device accessory information from the mobile device accessory and to determine activation of the send/end key using the received mobile device accessory information. The switch can be configured to receive connection information indicative of mobile device accessory connection to the audio jack and to isolate a reference input of the comparator from a supply voltage using the connection information, for example, to reduce leakage current.

Abstract: An impedance matched resonant circuit uses inductors coupling an audio source and a speaker array in order to reduce feedback reflection induced by an audio signal traveling from the audio source to the array of speakers. An RC circuit could also be coupled to the positive and negative terminals of the speaker array to reduce the slope differential of the audio signal at certain frequencies. The circuit can be packaged together in a single module with switches to activate and deactivate portions of the circuit to alter the effectiveness of the circuit depending upon need.

Abstract: Electronic devices such as compact portable media players are provided. A housing for an electronic device may be relatively compact. The housing may include a door assembly with an attached spring-loaded clip. The electronic device may include a hold switch. Depending on the state of the hold switch, the electronic device may be in an off mode, a continuous playback mode, or a shuffle playback mode. The electronic device may not have integrated media playback controls such as play, pause, rewind, fast forward, etc. As one example, the electronic device may connect to an accessory that has media playback controls. Buttons and other user interfaces may be included in the accessory and user input information may be conveyed between the accessory and the electronic device using a wired path including audio connectors. The electronic device may include a printed circuit board assembly that is nested together with a battery assembly.

Abstract: A secure mounting device for connecting handheld electronic equipment securely to a control panel, including the dashboard of a vehicle, can include a cover panel, and a connecting component with a locking component, which can be inserted in a joint between the control panel and a radio or other control panel instrument, to lock in place in a locking surface. Additionally, the cover panel can hold an electronic device. The connecting component can be configured as a media box with a box cavity for storing an electronic device. The secure mounting device can also include a switchover device, which optionally keeps a vehicle audio system intact and fully functional, to switch back and forth between the vehicle audio system and external electronic devices, such that the secure mounting device functions as a docking station for electronic devices.

Abstract: Disclosed is a headset, and a method of switching a first input signal for a left ear and a second input signal for a right ear of a user.

Abstract: A microphone system has a primary microphone for producing a primary signal, a secondary microphone for producing a secondary signal, and a selector operatively coupled with both the primary microphone and the secondary microphone. The system also has an output for delivering an output audible signal principally produced by one of the to microphones. The selector selectively permits either 1) at least a portion of the primary signal and/or 2) at least a portion of the secondary signal to be forwarded to the output as a function of the noise in the primary signal.

Abstract: Through a cable coupling two portions of a communications headset, conductors of the cable providing electric power from one of the portions to another are caused to do so with one of a selection of different predetermined voltage levels used to control aspects of one or more functions performed by the communications headset, including enabling or disabling functions, perhaps at least partially by controlling the manner in which the provided electric power is used.

Abstract: Technology for smart line-in processing in an audio environment is disclosed. An example playback device includes a line-in connector for receiving a first audio signal, a network interface, and a processor. A computer readable storage medium has stored instructions executable by the processor to determine that the first audio signal is present at the line-in connector, and, in response to determining that the first audio signal is present at the line-in connector, (i) cease playback of a second audio signal being played by the playback device, wherein the second audio signal is not present at the line-in connector, (ii) cause the playback device to play at least a first portion of the first audio signal, and (iii) cause the playback device to transmit, via the network interface, at least a second portion of the first audio signal to another playback device.

Abstract: A channel conversion part (214) performs channel conversion on audio data of a plurality of channels so that the number of channels thereof is converted to an appropriate number of channels for which an acoustic effect can be verified or perceived by audience according to the volume level of reproduced sound, and audio is output only with a required number of channels. In addition, a frequency control part (215) for controlling the operating frequencies of switching regulators (220-223) of audio amplifiers (224-227) also performs frequency control according to the volume level of sound of each channel which performs an audio output.

Abstract: An image display device includes: a first audio signal input terminal to which a first audio signal is input from a microphone; and a control section adapted to control power supply from a power supply circuit to the microphone based on type information indicative of whether a type of the microphone to be connected to the first audio signal input terminal is a first type which is requiring power supply or a second type which is not requiring power supply.

Abstract: An all-in-one audio system includes an audio chip, an audio interface, first and second audio signal amplifiers, a speaker, a woofer, a multi-function controller, a high definition multimedia interface (HDMI), and a switch. The multi-function controller is connected to the audio chip, the switch, the audio interface, the first and second audio signal amplifiers, and the HDMI. When the multi-function controller detects a high definition multimedia signal through the HDMI, the multi-function controller turns off the switch, decodes the high definition multimedia signal into an audio signal, and transmits the audio signal to the audio interface, and the first and second audio signal amplifiers. The first and second audio signal amplifiers amplify the audio signal and output the amplified audio signal to the speaker and woofer.

Abstract: An output controller and an method for outputting a signal flow to one or more earphone jacks according to a connection status of each earphone jack. The output controller includes an interface unit having more than one earphone jacks and an output control unit. The output control unit includes a signal input terminal for receiving a signal flow, a detector, and a determining module. The detector detects whether each earphone jack is connected with an earphone and outputs one or more detected signals representing the connection status of the earphone jacks. The determining module outputs the signal flow directly to the connected earphone jack if only one earphone jack is connected to the earphone or distributes the signal flow being amplified correspondingly into each connected earphone jack if more than one earphone jack is connected to the earphones.

Abstract: A pair of PWM signals having mutually opposite or identical phases is applied to both terminals of a load to drive the load. An anomaly detection circuit detects a state of change in the pair of PWM signals (PWM+ and PWM?), performs counting operation when at least one PWM signal stops changing, and outputs an anomaly detection signal when the count value becomes a predetermined value.

Abstract: A method, computer program product, and computer system for sending, by a first computing device, a video feed with a pre-determined quality level to a second computing device. The first computing device determines that a volume level associated with the video feed reaches a threshold. The first computing device sends the video feed with a higher quality level to the second computing device based upon, at least in part, determining that the volume level associated with the video feed reaches the threshold.

Abstract: An electronic device includes a power supply, an adjustment circuit, and an audio outputting module. The power supply provides a working voltage. The adjustment circuit includes a control unit, a switch unit, and an adjustment unit. The control unit comprises a first pin and a second pin for outputting a first control signal or a second control signal respectively. When received first control signal from the control unit, the switch unit establishes a connection between the power supply and the adjustment unit, and the adjustment unit generates different driving voltages based on different combination of the first control signal and the second control signal outputted by the first pin and the second pin. The audio outputting module generates different tone frequencies based on different driving voltage.

Abstract: Embodiments disclosed herein provide systems and methods for pairwise audio capture device selection. In a particular embodiment, a method provides capturing audio information via a plurality of audio capture device pairs, wherein each audio capture device pair comprises a first audio capture device and a second audio capture device. Based on the audio information, the method provides determining a difference in audio energy between audio captured by the first and second audio capture devices for each of the plurality of audio capture device pairs. The method further provides selecting an audio capture device pair of the plurality of audio capture device pairs based on the audio capture device pair having the largest difference in audio energy.

Abstract: A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.

Abstract: An application for present invention includes a television with a set of speaker outputs including at least a left speaker and a right speaker. On screen displays are used to properly configure the speakers and assure maximum audio quality from the television. In some embodiments, a cross-point switch connects the speakers attached to the television with the correct outputs of an internal amplifier.

Abstract: An audio system including a legacy radio system having a radio and a set of speakers, and an audio selection system electrically coupled between the radio and the set of speakers. The audio selection system is configured to detect a signal containing audio information, with the signal not coming from the radio. The audio selection system is further configured to electrically disconnect the set of speakers from the radio and to route the audio information to the set of speakers upon detection of the signal.

Abstract: A method of communicating with an electronic device. The method includes providing an electronic device having an audible sound receiving and generating sub-system including a microphone, transmitting from a source at least one acoustic signal encoded with information, receiving said at least one acoustic signal by said microphone and determining a spatial position, distance or movement of the microphone relative to the source, responsive to the received at least one signal.

Abstract: Method for creating an audio environment having N speakers HPi, i=1 . . . N fed by N signals Si, i=1 . . . N generated from M theoretical signals STj, j=1 . . . M provided to feed M theoretical speakers HPTj, j=1 . . . M , wherein: position information is determined relating to the N speakers HPi, i=1 . . . N and a listening point, the two theoretical speakers HPTj and HPTj+1 which would be angularly closest to a speaker HPi, the signal Si is determined according to the following equation: Si=Gi[STj(GpijGeij)+STj+1(Gpi(j+1)Gei(j+1))]e?i??i wherein: Gpij and Gpi(j+1) are panning gains, Geij and Gei(j+1) are balancing gains Gi and i are a positioning gain and delay, respectively, which enable the speakers HPi, i=1 . . . N to be virtually repositioned in terms of distance so that all sounds intended to simultaneously arrive at the listening point according to the encoding format actually arrive therein simultaneously, irrespective of the remoteness of the speakers relative to the listening point.

Abstract: An ultra-compact headset device including both speaker and microphone capability in at least one earphone overcomes the minimum size requirements of previous headsets by controlling the speaker and microphone functionality so that each earphone functions either as a speaker or microphone, but never both at the same time. Various embodiment headsets may include a pair of earphones each with one or more transducers capable of converting electrical signals into sound and vice versa. The ultra-compact headset may be wirelessly coupled to a mobile device, such as a cellular telephone or smart phone.

Abstract: A handset microphone includes: a microphone unit, a first switch for turning on or off the output from the microphone unit, and a second switch for enabling or disabling the output from the microphone unit; the first and second switches have contacts operated by a magnetic field; the contact of the first switch is closed and short-circuits the output terminals while the first switch is being affected by the magnetic field; and the contact of the second switch is opened and disconnects one of the output terminals while the second switch is being affected by the magnetic field.

Abstract: Techniques for utilizing a plurality of switches to reduce crosstalk in a headset jack for accommodating both European and North American type headset plugs. In an aspect, a six-switch solution is provided to selectively couple first and second terminals of the jack to a ground and a microphone terminal, and further to selectively couple a ground sensing input to the first or second terminal of the jack. The ground sensing input is provided to left and right audio channel amplifiers for driving the corresponding left and right terminals of the headset, to provide a common-mode reference level to the left and right audio channel amplifiers. In another aspect, at least four physical pins are provided to couple the switches to the ground and microphone terminals of the jack, and the connections between the ground sensing inputs and the jack may be provided adjacent to the jack for better isolation.

Abstract: N input channel signals from an input channel section having N input channels are selectively supplied to M mixing buses and cue buses. Mixed outputs from the mixing buses are supplied, via talkback input sections, to an output channel section having M output channels, and M output channel signals from the output channel section are patched to output ports via an output patch section. Talkback signal from a talkback supply section is supplied to the talkback input sections. When a talkback function is ON, a talkback signal is mixed with the mixed outputs from the mixing buses and then output to the output channels, during which time the mixed outputs are temporarily attenuated.

Abstract: An analog input module includes an activation unit, an analog/digital converter, an input circuit with a first input and a second input and a voltage divider disposed between the first input and the second input. The activation unit is connected to the first input and the second input and is connected upstream of the analog/digital converter. The voltage divider has center tap which is connected to a first comparator input of a comparator of a closed-loop control unit. The closed-loop control unit has a switching device disposed between the second input and a reference point. The comparator includes a second comparator input which is connected to a reference source. The comparator has a control output which is connected to a control input of the switching device. The closed-loop control unit is configured such that the switching device enables or disables a current path to the reference point.

Abstract: A method and apparatus for adapting an electronic device to receive digital television broadcast signals is disclosed. The device comprises a switch commandable to interpose one or more matching networks as in the RF signal path according to a channel command to match an integrated headset antenna to the tuner receiving the RF signals.

Abstract: Practical speaker connection is identified using a device having a sound channel of a 5.1 channel or 7.1 channel, and a device is provided that can easily reproduce the optimum multiple channels. Actual speaker arrangement can be identified by, for example, measuring the impedance of a terminal at the side of an audio amplifier. If incorrect connection is found, a warning is issued. This information is transmitted to a signal source with an EDID and a signal with the optimum a number of sound channel is sent. The EDID is also used for the connection with a display unit and the speaker connection with which the display unit is provided uniquely. For example, a sound through the 7.1 channel is easily reproduced using the speaker of the display unit in the channel of the front speaker.

Abstract: A microphone amplifier comprises an input terminal (E100) for applying an input signal (IN), an output terminal (A100a) for outputting an output signal (OUT), and an additional output terminal (A100b) for outputting an additional output signal (VBIAS). The microphone amplifier also contains an amplifying circuit (10) for generating the output signal (OUT) by amplifying the input signal (IN), wherein the amplifying circuit (10) is connected between the input terminal (E100) and the output terminal (A100a), and a voltage generator (30) for generating the additional output signal (VBIAS). A supply voltage terminal (V30) of the voltage generator (30) is connected to the output terminal (A100a) of the microphone amplifier. Since the amplifying circuit (10) makes available a supply voltage (V) for the voltage generator (30), the microphone amplifier can be operated without a separate supply voltage terminal.

Abstract: The invention is directed to systems, methods and computer program products associated with a microphone system for receiving a sound and producing an output signal representing the sound. The microphone system has a first microphone having a first dynamic range, the first microphone to receive the sound and produce a first sound signal based on the received sound. It also has a second microphone having a second dynamic range, the second microphone to receive the sound and produce a second sound signal based on the received sound, wherein the first dynamic range and the second dynamic range overlap thereby forming a transition dynamic range and processing logic operatively coupled to the first microphone and the second microphone. The processing logic is configured to receive the first sound signal from the first microphone, receive the second sound signal from the second microphone, and generate the output signal by combining the first sound signal and the second sound signal.

Abstract: A method and apparatus for controlling a sound input path in an electronic device. The method includes detecting a connection of an earphone device to an earphone interface; detecting a sound input through an earphone microphone, when detecting the connection of the earphone device. The earphone microphone is selected as a sound input device, when detecting the sound input through the earphone microphone.

Abstract: Managing audio of a device including transmitting a signal through a port of the device in response to an audio device coupling to the port, initializing an audio mixer of the device in response to detecting the signal, and configuring the audio mixer to manage audio transferred between the device and the audio device.

Abstract: Techniques for providing multiple power supplies in electronic devices are disclosed. According to one aspect of the present invention, an appropriate power supply is provided only to accommodate a volume setting. In other words, there are at least two power supplies, one with a low voltage and the other with a high voltage. The high voltage power supply is only applied when there is a need to accommodate a volume setting. Thus the power consumption of the amplifiers is well controlled. As a result, the designs of the device and heat dissipation therein can be simplified and lowered in cost.

Abstract: In an audio processing apparatus of the present invention, one or two audio signals selected from a surround rear left audio signal, a left outer audio signal and a left upper audio signal is (are) amplified to be outputted from a speaker terminal(s) corresponding to this (these) channel(s) without necessity to provide amplifiers of all channels. When the surround rear left audio signal is included, a switch S13a is turned ON to supply the surround rear left audio signal amplified by an amplifier 12a to a SP terminal 14a. When the left outer audio signal is included, a switch 13b is turned ON to supply the left outer audio signal amplified by the amplifier 12a to a SP terminal 14b, or a switch 13c is turned ON to supply the left outer audio signal amplified by an amplifier 12b to the SP terminal 14b. When the left upper audio signal is included, a switch 13d is turned ON to supply the left upper audio signal amplified by the amplifier 12b to a SP terminal 14c.

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: The present technology relates generally to a closed-loop power stage and audio amplifier circuits comprising the same. The present technology further provides a method for controlling an amplifier circuit. The closed-loop power stage is configured to receive a PWM input signal having a first frequency and a first duty cycle, a power supply voltage, and a bias signal related to the power supply voltage, and to output a square-wave signal having a second frequency and a second duty cycle. The closed-loop power stage comprises a feedback loop which is configured to regulate the second duty cycle of the square-wave signal in response to a variation in the power supply voltage. The audio amplifier circuit comprising the closed-loop power stage may have a stable output voltage and thus have good power supply rejection performance.

Abstract: Systems and methods are described that perform audio source localization in a manner that provides increased robustness and responsiveness in the presence of acoustic echo. The systems and methods calculate a difference between a signal level associated with one or more of the audio signals generated by a microphone array and an estimated level of acoustic echo associated with one or more of the audio signals. This information is then used to determine whether and/or how to perform audio source localization. For example, a controller may use the difference to determine whether or not to freeze an audio source localization module that operates on the audio signals. As another example, the audio source localization module may incorporate the difference (or the estimated level of acoustic echo used to calculate the difference) into the logic that is used to determine the location of a desired audio source.

Abstract: A system for wireless control of audio signal switching. The system includes a remote unit, having a physically actuated switch and a remote unit status indicator, and a main unit. The main unit includes a main unit transceiver and one or more relays which may switch the path of the audio signal or provide remote control of external devices, in response to input at the physically actuated switch. The main unit may send status updates to the remote unit, allowing the remote unit to display the current state of the main unit to a user at the remote unit.