61results about "Remote control of amplification" patented technology

A user terminal apparatus is provided. The user terminal apparatus includes a touchscreen configured to display a plurality of first user interface (UI) elements for adjusting respective sound volumes of the plurality of speaker apparatuses and a plurality of second UI elements for receiving a selection of a speaker apparatus of the plurality of speaker apparatuses, to group speaker apparatuses of the plurality of speaker apparatuses, the grouped speaker apparatuses corresponding to selected UI elements from among the plurality of second UI elements, and to receive sound volume adjusting input through one of the plurality of first UI elements corresponding to any one of the plurality of grouped speaker apparatuses, and a controller configured to change all first UI elements of the grouped speaker apparatuses based on the sound volume adjusting input.

A baby monitor system incorporated into a receiver of the baby monitor circuitry that can remotely control an electric or electronic device when the output sound level of the receiver reaches a reference level. The control can be by infrared, radio frequency or hardwire transmission of a volume control command to the electric or electronic device. By incorporating this control system into the baby monitor, a parent is ensured to hear sounds of a baby.

A method, apparatus, and computer program product are provided for optimising the pulse shape of optical signals output from an optical transmitter. The optical transmitter includes an optical modulator controlled by a bias voltage and a signal drive level, wherein the bias voltage and signal drive level are controlled automatically in a systematic way in dependence on one another to adapt the pulse shape of an optical output signal for optimal transmission over a transmission line.

Optical or electrical attenuation is provided at the infrared (IR) receiver of a first device, such as a remote control, together with a commensurate increase in output of the IR transmitter of an appliance, such as a set top box, to improve the signal-to-noise ratio of IR communications with respect to any background infrared radiation, such as radiation from a plasma display screen.

The invention discloses a digital automatic gain control device based on a specific look-up table, which includes: an antenna (11), a band-pass filter (12), a variable gain amplifier (13), a down-conversion mixer (14), an analog-to-digital converter (15), a baseband module (16) and a DAC (10), an amplitude detector (17) which performs amplitude detection for N received sample points by use of a domain average method, a look-up table (18) which compares detection results and a reference level and gets the error between the two, and a loop filter (19) which obtains series numbers of corresponding gain control signals by series number of error signals, takes the series number of the gain control signals as indexes and inputs into the look-up table to control VGA gains after obtaining the series number of the gain control signals through the DAC feedback. The invention can be used widely in receivers for manifold systems. The AGC feedback control loop of the invention has the same rapid response with the feed forward control loop at the starting phase; and a slow loop filter based on the look-up table is adopted at the AGC tracking stage, thus ensuring high stability of the loop.

A mobile communication terminal interacts with a digital hearing aid and a wireless hearing aid uses the mobile communication terminal. When a user having the mobile communication terminal interworking with the digital hearing aid operates the hearing aid, an amplification function suitable for auditory characteristics of the user is performed. That is, when auditory information of the user is sent to the terminal, the terminal adjusts an amplification gain to prevent the acoustic shock by measuring an environmental signal. The terminal computes an environment profile by analyzing the measured environmental signal and auditory information of the user sent from the hearing aid and automatically adjusts a non-linear amplification level according to a user environment by sending the environment profile to the hearing aid.

A method and portable terminal for automatically controlling an output volume of audio output of a head phone when the head phone is connected to a portable terminal are provided. The method of controlling an audio output in a portable terminal, includes outputting a test audio signal to a head phone for a preset playback time when the head phone is connected to the portable terminal; collecting neighboring noise interval information and impedance interval information of the head phone while the test audio signal is output to the head phone; determining impedance of the head phone based on the neighboring noise interval information and the impedance interval information; determining a gain of an audio signal based on the determined impedance; and amplifying the audio signal in proportion to the determined gain, and outputting the amplified audio signal to the head phone.

An antenna system for receiving radio waves and for operation in conjunction with a remote controller that transmits control data including gain state data. The antenna system includes an antenna that receives the radio waves and outputs a radio frequency signal and a radio frequency amplifier coupled to receive and amplify the radio frequency signal to a gain level controlled through a gain control input. A remote control receiver receives the control data and a controller is coupled to the gain control input and the remote control receiver. The controller couples the gain state data to the gain control input, thereby remotely controlling the gain level of the radio frequency amplifier. A remotely controlled antenna rotor is also taught.

A method of processing an audio signal is disclosed. The present invention includes receiving, by an audio processing apparatus, an input signal; receiving user gain input; generating a linear gain factor and a non-linear gain factor using the user gain input; modifying the non-linear gain factor using absolute threshold of hearing and power of the input signal to generate a modified non-linear gain factor; and, applying the linear gain factor and the modified non-linear gain factor to the audio signal.

An apparatus (10) for adjusting sound volume for an audio system includes a controller (101) connected to an amplifier (40) of the audio system for controlling amplification of the amplifier, and a first circuit (102) for adjusting the sound volume. The controller includes a microprogrammed control unit (1010), a random-access memory (1012), and an electrically erasable programmable read-only memory (1014). The first circuit includes an attenuation circuit (1022) connected to a tuner of the audio system for attenuating input audio signals, and a switch (1024). An input end of the switch is connected to the tuner and an output end of the attenuation circuit, and an output end of the switch is connected to an audio processor (30) of the audio system. The apparatus enables a user to freely adjust an average level of sound produced by the audio system, and simultaneously avoid being bothered by loud transmissions.

Apparatuses, methods and systems are provided for controlling volume of a media system. A remote control is configured to control volume of a media unit and an external device simultaneously or consecutively.

A volume control pedal has an opposed emitter and receiver which are set up to establish an emission path therebetween. A shade is provided to intersect the emission path. Pedal operation induces relative displacement between the shade and emission that as a result varies the emission reception such that the receiver's output provides a control variable for volume control. The shade has a varying regions of light and dark as rendered by an image of a varying dot density pattern. This allows among other things producing the image by a computer-implemented process, as well as printing it on transparent stock such as optionally on a negative film by a film developing process.

The disclosure provides a muffling device and a muffling method, a communication device and a wearable device, relating to the technical field of communications. The muffling device comprises: an acquisition module configured to acquire reference acoustic wave information of a user; a modulation module configured to analyze the acoustic wave characteristics of the reference acoustic wave information to obtain characteristic parameters of the reference acoustic wave information; a muffling module for generating compensated acoustic wave information according to the characteristic parameters ofthe reference acoustic wave information; a correcting module configured to compare the muffed acoustic wave information obtained by superimposing the compensated acoustic wave information with the reference acoustic wave information with the reference acoustic wave information, and feedback the comparison result to the muffling module; and an output module configured to output the adjusted compensated acoustic wave information, wherein the muffling module is further configured to adjust the compensated acoustic wave information according to the fed back comparison result. The disclosure is capable of reducing the impact of the call volume on the surrounding environment and implementing a secure call.

Disclosed are a system and a method for transceiving data in an audio frequency band. The system includes a data input unit to input data for acoustic communication into an audio signal, a transmitting unit to transmit the audio signal including the data in the audio frequency band, and a receiving unit that receives the audio signal including the data and performs synchronization of the audio signal through a matched filtering using a matched filter in order to extract the data according to predetermined extraction processing. The data to be transmitted are added to an audio signal and the audio signal is transmitted in the audio frequency band, so that the data for the acoustic communication are effectively transmitted to the recipient in the audio frequency band.

The application discloses an audio signal processing device and a speaker. The audio signal processing device includes a digital signal processing module, an input module, an output module and a control module; the digital signal processing module is connected to the input module and the output module, and the control module is connected to the output module; the output module is composed of morethan two paths of output channels, and each path of output channel includes a power amplifier and a loudspeaker that are connected in series; the digital signal processing module is used to process areceived audio signal by using at least two different audio processing algorithms to obtain more than two paths of audio processing signals, and each path of audio processing signal corresponds to onepath of output channel; and the control module is used to control whether the power amplifier in each path of output channel works and control the magnification at work. The audio signal processing device provided by the application can implement various sound effects and improve the user experience.

A method to send data or commands through streaming audio signal by using special tone(s) or waveform at a short period of time or using inaudible tone(s) or waveform, filterable tone(s) or waveform mixed into music or audio signal to send for data/commands. In audio stereo channels, by using one of stereo channels or adaptively arranged by time to use one of channels for sending special tone(s) or waveform for data or command purpose as well switching the speaker of sending command channel to other streaming music or audio channel without creating further noise or interruption.