Abstract: A data communication apparatus which improves security against eavesdropping is provided for secret communication using Y-00 protocol. In a data transmitting apparatus 101, a multi-level code generation section 111 generates, based on key information 11, a multi-level code sequence 12 in which a signal level changes so as to be approximately random numbers. A multi-level processing section 112 generates a multi-level signal 13 having a plurality of levels each corresponding to a combination between information data 10 and the multi-level code sequence 12. A level conversion section 113 divides the plurality of levels of the multi-level signal 13 into several groups, and allocates one level of a converted multi-level signal 21 to a plurality of levels included in each of the several groups in an overlapped manner. The level conversion section 113 then converts the multi-level signal 13 into the converted multi-level signal 21.

Abstract: A content processing apparatus includes a read unit which reads encrypted key information from a recording medium, a decryption unit which decrypts the encrypted key information with a device key and dynamic information to obtain key information containing content keys, an update unit which updates the dynamic information, a key information processing unit which updates the key information by extracting a content key corresponding to a move target content from the key information, and removing the content key from the key information, a first encryption unit which encrypts the updated key information with the device key and the updated dynamic information, a second encryption unit which encrypts the content key with a shared key, and a write unit which overwrites the updated encrypted key information on the encrypted key information in the medium and writes the encrypted content key in the medium.

Abstract: A remote diagnostic system for robots including a number of at least two robots, wherein a controller of each robot of the system is locally connected to a service unit provided with local processing power, a remote service center provided with a connector server is arranged, and a communications infrastructure for transferring packets of information between a controller of a robot of the system and connector server via the service unit is arranged for performing remote monitoring and diagnostics at the remote service center, wherein the communications infrastructure uses internet and/or GPRS communication lines.

Abstract: In a PON system, clocks of an optical network unit and an optical line terminal are synchronized. An optical network unit generates a new encryption key and transmits it to an optical line terminal. The optical network unit transmits a notification that includes an encryption key changing time to the optical line terminal. Finally, the optical network unit and the optical line terminal change previously held encryption keys to the new encryption key at the encryption key changing time.

Abstract: An information processing apparatus includes: an acceptance unit that accepts formed information to be formed on a medium and target information to be recorded as an information image together with an image based on the formed information; a specification acceptance unit that accepts specification of the accepted formed information or information concerning the formation result of information image on the medium; an encryption key acquisition unit that acquires an encryption key based on the specified information; an information image generation unit that encrypts the target information using the acquired encryption key, and that generates the information image based on the encrypted target information; and an output unit that outputs a command for forming the information image on the medium together with the image to be formed.

Abstract: The invention concerns a method and device for actively correcting acoustic properties of a listening zone (27) of an acoustic space (1), comprising means for converting a signal to be reproduced (2, 4) in an acoustic space (1), means for attenuating resonance including at least means for measuring the perturbed sound signal (15), means for processing an electric signal (6) and at least one secondary sound reproduction source (8).

Abstract: A stereophonic sound reproduction device has a sound amplifying device that amplifies multi channel surround sound signals for respective channels and outputs the multi channel surround sound signals to a plurality of speakers that are located surrounding a listening position and a rear reverberation creation device, in the rear reverberation creation device, convolution computations are performed on direct sound or initial reflected sound contained in the sound signals of the respective channels of multi channel surround sound signals, and reverberation groups that have flat frequency characteristics and have non-uniform delay time intervals, and that have different delay time intervals for the respective channels while having the same envelope characteristics for the respective channels are created and output for the respective channels.

Abstract: A subwoofer (72) is equipped with a wireless receiver (80) to receive signals containing information for a Low Frequency Effects (LFE) channel and information for both surround channels. In one form, the LFE is added to one or both surround channels to provide a stereo surround signal (containing both surround channels including a multiplexed LFE channel). The subwoofer (72) utilizes the LFE channel, powers surround speakers (74, 76), and passes the surround signals to respective surround speakers. A receiver (66) multiplexes LFE signals into either one or both surround sound audio channels. A digital RF transmitter (70) of the receiver transmits the combined subwoofer/surround channels to the wireless receiver (80) of the subwoofer. The remote subwoofer is connected to a power source (78). The surround speakers (74, 76) are connected to the subwoofer so as to receive the surround channels and be powered thereby.

Abstract: Separating a source in a stereo signal having a left channel and a right channel includes transforming the signal into a short-time transform domain; classifying portions of the signals having similar panning coefficients; segregating a selected one of the classified portions of the signals corresponding to the source; and reconstructing the source from the selected portions of the signals.

Abstract: A source width estimation system may estimate an auditory source width of a sound. The system detects a first frequency modulated noise signal and a second frequency modulated noise signal. The detected noise signals may be processed to obtain an average value of a lateral width of a binaural activity over time and a plurality of sub-bands. The auditory source width of the noise signals may be determined from the average value of the lateral width of the binaural activity.

Abstract: According to one embodiment, a signal processing apparatus includes a speaker configured to output the received input signal on which a delay detection signal which has a frequency component of an inaudible frequency on a received input signal is superposed to an acoustic space, an extracting section configured to extract the delay detection signal from the sending input signal outputted from microphone configured to collect sound in the acoustic space a calculating section configured to calculate a delay time between the received input signal and an acoustic echo component contained in the sending input signal, a delay section configured to delay the received input signal by a time corresponding to the delay time and generate a delayed received input signal, and an echo suppression processing section configured to suppress the acoustic echo component contained in the sending input signal by use of the delayed received input signal.

Abstract: An audio signal is processed by transforming the signal into a frequency domain representation having a plurality of frequency subbands. A decorrelated signal is derived from the frequency domain representation using a phase rotation.

Abstract: An electricity echo cancellation device applied at a terminal includes: an input buffer memory module, a network echo delay computation module and an adaptive filtering module. The adaptive filtering module includes an adaptive filter, a subtracter and a dual-ended voice detection module. An electricity echo cancellation method includes: calculating a network echo delay according to relevant information of an RTCP packet transmitted from the network; and dynamically adjusting a terminal input signal to be adaptively filtered according to the network echo delay. The present invention ensures the electricity echo cancellation effect at the final user end on the whole, and improves the effectiveness of electricity echo cancellation. Meanwhile method of the present invention can be realized with software, thus avoiding influences of hardware memory restricts on the echo cancellation effect. In addition, the present invention only needs a single-point deployment, and thus the cost is saved.

Abstract: An audio collector collects an ambient sound near a sound-catching ear and converts the collected ambient sound into a collected-sound electrical signal. A noise canceller generates an offset sound for acoustically canceling the ambient sound based on a phase-inverted collected-sound electrical signal obtained when a phase of the collected-sound electrical signal is inverted and emits the generated offset sound near the sound-catching ear. An ambient sound monitor generates a monitor sound which is a phase inversion sound of the ambient sound based on the phase-inverted collected-sound electrical signal and emits the generated monitor sound near the sound-catching ear.

Abstract: An ear insert for protecting the ear from loud noise can have a stem that is configured to be inserted into an ear canal. One or more attachments can be configured to attach to the stem in a manner that at least partially defines a fit of the ear insert within an ear canal. For example, rubber o-rings can be can be selected according to their size so as to provide a desirable fit of the insert within the ear canal. In this manner, the undesirable leakage of ambient noise into the ear canal is mitigated and hearing protection is enhanced.

Abstract: In a short range radio communication headset, signals transmitted by the short range radio communications are received while direct sounds propagated from an external are detected. Then, a digital signal adaptation processing using either received signals or the direct sounds as reference signals are applied, and a ratio between the received signals and the direct sounds is controlled by correlating the reference signals and another one of the received signals and the direct sounds that are not used as the reference signals and extracting necessary components.

Abstract: An audio device integration system is provided. One or more after-market audio devices, such as a CD player, CD changer, MP3 player, satellite receiver, DAB receiver, or the like, is integrated for use with an existing OEM or after-market car stereo system, wherein control commands can be issued at the car stereo and responsive data from the audio device can be displayed on the stereo. Control commands generated at the car stereo are received, processed, converted into a format recognizable by the audio device, and dispatched to the audio device for execution. Information from the audio device, including track, disc, song, station, time, and other information, is received, processed, converted into a format recognizable by the car stereo, and dispatched to the car stereo for display thereon. One or more auxiliary input sources can be integrated with the car stereo, and selected between using the controls of the car stereo.

Abstract: In order to produce a powerful bass, bass boxes require a relatively large installation volume, for which insufficient space is frequently available in the interior of a motor vehicle, in particular in a passenger motor vehicle. When drivers and front-seat passengers require the sound installation to have a powerful bass, a bass box requires a volume in the order of magnitude of at least 10 to 15 liters. In order to restrict the physical space which is required for this purpose in the vehicle interior, the active sound transducer of the loudspeaker system is acoustically coupled on its rear face to a resonant area which is formed at least in parts by the cavity within a supporting structure of the vehicle.

Abstract: An audio system generates position-independent auditory scenes using harmonic expansions based on the audio signals generated by a microphone array. In one embodiment, a plurality of audio sensors are mounted on the surface of a sphere. The number and location of the audio sensors on the sphere are designed to enable the audio signals generated by those sensors to be decomposed into a set of eigenbeam outputs. Compensation data corresponding to at least one of the estimated distance and the estimated orientation of the sound source relative to the array are generated from eigenbeam outputs and used to generate an auditory scene. Compensation based on estimated orientation involves steering a beam formed from the eigenbeam outputs in the estimated direction of the sound source to increase direction independence, while compensation based on estimated distance involves frequency compensation of the steered beam to increase distance independence.

Abstract: A sound source localization system and a sound source localization method. The sound source localization system includes sound capturing devices and an arithmetic unit. The sound capturing devices sense a sound source to output time domain signals. The arithmetic unit transforms the time domain signals into frequency domain signals, performs a cross spectrum process according to the frequency domain signals to determine time differences of arrival, and locates the sound source according to the time differences of arrival and locations of the sound capturing devices.

Abstract: Method and system for digitally directive focusing and steering of sampled sound within a target area for producing a selective audio output accompanying video. In a preferred embodiment, the method and system is characterized by receiving position and focus data from one or more cameras shooting an event, and use this input data for generating relevant sound output together with the picture.

Abstract: A system comprising audio logic adapted to convert captured sound into an audio signal. The system also comprises transmission logic which causes noise to be added to the audio signal. The system further comprises processing logic adapted to at least partially remove the noise from the audio signal by subtracting a noise waveform from the audio signal to produce a result signal. The processing logic generates the noise waveform using power level information associated with the transmission logic. The transmission logic transmits the result signal to another electronic device.

Abstract: A noise suppressing apparatus suppresses a noise component of a sound signal which contains the noise component and a signal component. In the apparatus, a frequency analyzing section divides the sound signal into a plurality of frames such that adjacent frames overlap with each other along a time axis, and computes a first spectrum of each frame. A noise suppressing section suppresses a noise component of the first spectrum so as to provide a second spectrum of each frame in which the noise component is suppressed. A frequency specifying section specifies a frequency of a noise component of each frame. A phase controlling section varies a phase of the noise component corresponding to the specified frequency in the second spectrum by a different variation amount each frame.

Abstract: A sound output device with an earphone mode and a speaker mode is provided. The sound output device changes a circuit resistance value of loudspeaker modules by adjusting a connecting state of the loudspeaker modules in the sound output device. Thus the sound output device is set to an output volume value of the earphone mode or of the speaker mode, so as to meet the requirements of the user, and to improve the convenience in use of the sound output device.

Abstract: Disclosed is a wireless audio transfer system. The wireless audio transfer system includes an audio transmitting apparatus including a microphone and a modulating/transmitting unit for transmitting radio waves modulated using an audio signal from the microphone, an audio receiving apparatus including a receiving/demodulating unit for receiving the radio waves transmitted from the audio transmitting apparatus and demodulating the audio signal and an audio output terminal for outputting the audio signal demodulated by the receiving/demodulating unit, and an image pickup apparatus including an audio input terminal for inputting the audio signal outputted from the audio receiving apparatus.

Abstract: The invention relates to a method of manufacturing a MEMS capacitor microphone and further to such MEMS capacitor microphone. With the method a MEMS capacitor microphone can be manufactured by stacking pre-processed foils (10) having a conductive layer (11a,11b) on at least one side. After stacking, the foils (10) are sealed, using pressure and heat. Finally the MEMS capacitor microphones are separated from the stack (S). The pre-processing of the foils (preferably done by means of a laser beam) comprises a selection of the following steps: (A) leaving the foil intact, (B) locally removing the conductive layer, (C) removing the conductive layer and partially evaporating the foil (10), and (D) removing both the conductive layer as well as foil (10), thus making holes in the foil (10). In combination with said stacking, it is possible to create cavities and membranes. This opens up the possibility of manufacturing MEMS capacitor microphone.

Abstract: An acoustic sensor is disclosed which can be fabricated on a single chip with an electronic detection circuit by modular integration of the fabrication processes. An advantage of the disclosed acoustic sensor with on-chip signal detection circuit is smaller overall device size and lower sensitivity to electromagnetic interference and vibration. A second advantage of the disclosed acoustic sensor is the combined stress-relief and electrostatic clamping design of the diaphragm, which allows for further reduction of the diaphragm size, and hence device size, without compromising the microphone acoustic sensitivity, and at same time eliminates issues with diaphragm bow normally associated with stress-relief techniques.

Abstract: A piezoelectric buzzer driving circuit (200) for driving a piezoelectric buzzer (211) with two terminals includes a reverser (216). The reverser includes an output terminal and an input terminal (24) configured for receiving a controlling signal to control an output of the reverser. The two terminals of the piezoelectric buzzer respectively connected to the input terminal and the output terminal such that a D-value of the voltage across the piezoelectric buzzer is twice as large as the voltage of the controlling signal.

Abstract: A directional loudspeaker provides an enhanced listening environment by producing an indirect sound field of greater amplitude than that of the direct sound field. The directional loudspeaker includes loudspeaker elements positioned to provide a listener located below the loudspeaker elements with an impression of sound spaciousness in a vehicle environment. The loudspeaker elements may include baffles or acoustic lenses to deflect the indirect field away from the path to the listener position. The loudspeaker may also be operated with windows open by channeling the indirect sound field through an acoustic waveguide and deflector to the listener. A sound processor is also provided to accept a sound input, create an indirect and direct sound field, output the sound fields to loudspeaker elements, and also may provide electronic enhancement effects such as multi-channel sound or sound parameter adjustment.

Abstract: An multimedia device integration system is provided. One or more after-market audio or video devices, such as a CD player, CD changer, digital media device (e.g., MP3 player, MP4 player, WMV player, Apple iPod, portable music center, or other device) satellite receiver (e.g., XM or Sirius receiver), DAB receiver, video device (e.g., DVD player), cellular telephone, or any other device or combinations thereof, is integrated for use with an existing OEM or after-market car stereo or video system, wherein control commands can be issued at the car stereo or video system and data from the after-market device can be displayed on the car stereo or video system. Control commands generated at the car stereo or video system are received, processed, converted into a format recognizable by the after-market device, and dispatched to the after-market device for execution.

Abstract: The object is to improve the effect of a noise reduction algorithm for hearing apparatuses and in particular hearing aids. This is achieved by a method wherein the input signal is modeled by a wanted signal model and a noise signal model. In addition, a signal statistic of the input signal is recorded in a data logging unit. The wanted signal model and/or the noise signal model can now be changed as a function of said signal statistic. Finally the noise component of the input signal is reduced using the noise signal model and/or the wanted signal model. This means that the models used can be continuously adapted to the hearing apparatus user's current situation.

Abstract: In order to reduce feedback in a hearing aid, a hearing aid receiver is provided that comprises a housing having an inside surface and an outside surface, a motor, an active armature that is attached to the motor and attached to the inside surface of the housing, the active armature being driven in a vibrational manner by the motor, and an external passive component that is attached to the outside surface of the housing, the external passive component designed to vibrate in a direction opposed to vibrations of the active armature. A corresponding method for operating such a hearing aid receives is also provided.

Abstract: A method and appertaining system for implementing the method is provided for designing hearing aids having flexible parts. Three-dimensional data is provided that is related to both a soft part and a hard part of a hearing aid component into a computer-based system. Additionally, information is entered related to material characteristics for both the soft part and the hard part of the component. A component within the hearing aid shell is placed and moved in a model generated by the system. Forces, stresses, and/or amount of deformation for parts of the component based on the location of the component and at least one of another component and the shell are calculated, and the three-dimensional data model of the shell is revised based upon the calculated degree of deformation, forces, and/or stresses.

Abstract: A hearing aid using a printed circuit board (PCB) is provided which minimizes internal wires since components of the hearing aid are disposed on the PCB. Since individual soldering of amplifier terminals and components of the hearing aid in an existing hearing aid faceplate manufacturing process which consumes the longest time can be automatically performed on the PCB in which the hearing aid components are automatically soldered and disposed, a total process time can be remarkably shortened.

Abstract: A construction of a CIC instrument is provided, along with a corresponding method of manufacturing such a CIC instrument, that prevents floating components from contacting with an insulated receiver and, therefore, assures feedback-free operation. This is achieved through the presence of a compartment for the receiver in which the receiver resides, and a cover placed on top of the receiver compartment in a mating recess of the receiver compartment.

Abstract: The invention provides, in one aspect, a loudspeaker that has electrodynamically-driven piston mounted in one external wall and that has movable panels in one or more other external walls. Those panels are air-coupled to the piston, e.g., via air within the enclosure, such that vibrational motion of the piston causes the vibration of the panels, thereby, improving the overall air coupling of the piston to the external environment, e.g., the listening room. Further aspects of the invention provide an improved driver for use, e.g., in the aforementioned loudspeaker. The driver comprises a three-part piston having first and second diaphragms coupled back-to-back with one another and having a voice coil face-mounted (or front-mounted) within the second diaphragm.

Abstract: A speaker attenuation system includes an attenuating member comprised primarily of open cell foam or other suitable material and having a size and a shape operable to attenuate a speaker when positioned in a central beam region of the speaker. A positioning mechanism positions the attenuating member predominantly in the central beam region of the speaker by attaching the attenuating member to the speaker.

Abstract: An electronic device includes a case and a microphone array. The case includes a front surface, a rear surface, and side edges connecting the front surface and the rear surface. The microphone array includes a first microphone module and a second microphone module disposed in the case and arranged in a row not parallel to the side edges of the case.

Abstract: An electrical module includes a base plate having an acoustic channel that opens into a first cavity at a first end and that is closed off by a microphone chip at a second end. The microphone chip borders a second cavity that opens to an exterior of the electrical module. The second cavity is separated from the acoustic channel by the microphone chip.

Abstract: A microphone unit includes: a housing which has an inner space; a partition member which is provided in the housing and divides the inner space into a first space and a second space, the partition member being at least partially formed of a diaphragm; and an electrical signal output circuit which outputs an electrical signal based on vibrations of the diaphragm. In the housing, a first through-hole through which the first space communicates with an outer space of the housing and a second through-hole through which the second space communicates with the outer space are formed.

Abstract: A condenser microphone includes a microphone chip and an LSI chip, which are stored in a microphone package having a sound hole. External sound enters the sound hole so as to propagate through the internal space of the microphone package, so that it is received by the microphone chip. The microphone package is designed to set the Helmholtz resonance frequency within the audio frequency range. The output signal of the microphone chip is supplied to an impedance converter included in the LSI chip. The output signal of the impedance converter is attenuated by an attenuation device with respect to the prescribed frequency band including the Helmholtz resonance frequency, which decreases when the condenser microphone is installed in the housing of an electronic device. Thus, it is possible to achieve the flat frequency characteristics in the output signal of the condenser microphone, which is thus improved in the S/N ratio.

Abstract: A multiple channel earphone is provided, which includes a chamber main body and a main chamber support located in the chamber main body. A front field mixing chamber, a main chamber, and a back chamber are formed in the chamber main body. The main speaker is located on the main chamber support or a partition board, a sub-speaker is disposed on a protruding portion of the chamber main body, and the back chamber is formed between the sub-speaker and the main chamber support or the partition board. In an embodiment, the multiple channel earphone structure further includes at least one or more pairs of chamber extension tubes disposed outside the chamber main body. According to the length of each chamber extension tube and the space in the chamber main body, a composite sound field characteristic generated in the earphone structure is adjusted and output by the multiple channel earphone.

Abstract: An earplug earphone with a special engagement is provided. The earplug earphone includes a body and an earplug. The body has a protruding connecting portion, wherein the protruding connecting portion has a first engaging element on the inner side thereof. The earplug includes a protruding portion having a second engaging element. The earplug is fixed to the body by engagement of the engaging elements. After the protruding connecting portion is combined with the protruding portion, a buffering segment spaced apart in an appropriate distance is formed between the earplug and the body. The buffering segment has an advantage for the earplug to match different external auricles of different users and to be inserted in the ears of different users, thereby making the earplug earphone of the present invention further conform to ergonomics.

Abstract: An over-the-ear hook is a one-piece tube that can hold an earphone for conducting sounds to the wearer's ear canal. The tube can be adjustable to the wearer's ear shape so as to allow the over-the-ear hook to rest securely behind any wearer's ear. To form an integral unit comprising the over-the-ear hook and the earphone: snugly ensconce the cable of said earphone in the groove cut in the surface of said tube as the opening of the groove is smaller than the diameter of said cable. The earphone can be easily detached from the over-the-ear hook after use for separate storage. Under the circumstances, the earphone cable needs not enlacing the over-the-ear hook for space-saving storage and would not be damaged thereof.

Abstract: An earphone jack comprises a housing, at least one first contact member and one second contact member. A contact piece formed on the first contact member is elastically supported on a supporting portion of the second contact member and located a distance above the contact piece of the second contact member, so as to ensure a good signal transmission between the circuit and the earphone jack.

Abstract: The invention relates to a consumer electronics device for enabling a presentation of media content. The device comprises a housing, a control means (130) for controlling the device, and a socket (110) coupled to the housing for connecting to an output means (200) for outputting the media content, wherein the socket is adapted for a user-operable manipulation to enable the control means. Advantageously, the consumer electronics device may not require any control interface supplementary to the socket according to the present invention.

Abstract: A loudspeaker mounting assembly includes a frame, a sleeve, and a tilt-angle adjustment mechanism. The frame may include an outer frame, an inner frame rotatable about a frame axis relative to the outer frame, and a frame wall extending away from a rear side. The sleeve is coupled to the inner frame at a pivot axis and is tiltable to a plurality of tilt angles relative to the inner frame. The tilt-angle adjustment mechanism is engageable with the sleeve to enable selection of a desired tilt angle. A loudspeaker may be mounted to the sleeve such that the loudspeaker may be swiveled about the frame axis and tilted about the pivot axis.

Abstract: An audio network as part of adapter or appliance for an appliance performing a useful cycle of operation on an object unrelated to the delivery of sound media. The audio network comprises an appliance accepting a plurality of consumer electronic devices and sending acoustical signals from at least one of the devices to a remote speaker.

Abstract: An electromagnetic transducer including a frame, a diaphragm disposed within the frame and coupled to the frame such that the diaphragm may rotate relative to the frame, a panel-shaped former connected to the diaphragm, a conductive coil connected to the former, and a magnetic assembly including a gap in which a magnetic field is provided. The gap is positioned to receive the conductive coil, and the conductive coil is electrically charged within the gap to move such that the diaphragm rotates about a rotational axis to generate sound waves.

Abstract: An apparatus for detecting an object is provided which detects the pitching of a vehicle, and detects the presence of an object the front of the vehicle itself with the pitching being taken into consideration. The apparatus includes a microcomputer that performs image processing for the image of the object to compute the velocity and acceleration of the object present in the picked-up image, and based on the computed acceleration of the object, to determine whether the image was captured when the vehicle itself was balanced. If the image is judged to be an image captured when the vehicle itself was not balanced, then the position of the object present in the picked-up image is computed based on another picked-up image that was captured when the vehicle itself was balanced.