Abstract: Systems and methods for second call during ring suppression are disclosed. After a communications device receives a first incoming call, the ringer is activated to produce an initial audible alert and thereafter, the ringer of the communications device is suppressed for subsequent audible alerts according to a timed ring suppression profile. Thereafter, a secondary incoming call is routed to the communications device and the ringer is activated to provide notification of the secondary incoming call while the first call is suppressed.

Abstract: In accordance with the teachings described herein, systems and methods are provided for optimizing distribution of advertisement information. In one example, call tracking data may be generated from a plurality of telephone calls made to a business entity, where the call tracking data includes geographical information to identify locations from which the plurality of telephone calls originated. A call distribution may be determined from the call tracking data, where the call distribution groups the call tracking data based at least in part on distances between the business entity and the locations from which the plurality of telephone calls originated. A probability density function may be generated from the call distribution and used in the generation of the advertisement distribution plan.

Abstract: A telecommunications system is disclosed that enables a user to pair a desk set that is an extension of a private-branch exchange with a cell phone that is accessible via the Public Switched Telephone Network. One feature of the telecommunications system enables an active call that is between the desk set and another party, to be transferred to the user's cell phone, while in the presence of third-party call control. This is advantageous because a user who is initially on a call at her desk set, but needs to get somewhere else (e.g., a meeting, the airport, home, etc.), is able to continue the call by transferring it to her cell phone. The third-party call control can be part of a computer-telephony integration (CTI) application—for example, in a telephone telemarketing center, which concurrently handles many active telephone calls.

Abstract: A method may include receiving a call having call data, determining that the call data cannot be forwarded along a call path, assigning an identifier to the call data, forwarding the call along the call path without the call data, and storing the call data and the identifier at a device outside the call path.

Abstract: Methods and apparatuses are disclosed herein for organizing communication information. Data received associated with a communication is recorded at the communication device. An identifier is associated with the communication. The identifier indicates a unique identity. A call score is calculated for the identifier at the communication device based on the communication. The particular identifier is ranked in a list in accordance with the calculated call score.

Abstract: A methodology wherein a voice service client application on one or more phones and a voice service server perform a call set-up process through a mix of an external data channel and a normal voice channel that enables call subject information to be effectively provided by a calling party to a called party so that it can be displayed along with other caller ID information.

Abstract: A system, method, and computer readable medium for establishing communication between two devices comprises connecting, by a first computer, to an open source Private Branch Exchange (PBX) platform via a port, receiving a phone number sent by a first one of the two devices at the open source PBX platform, invoking an interface module by the open source PBX platform, where the interface module resides on the open source PBX platform, and building a Calling Name request by the interface module related to the received phone number.

Abstract: A self-provisioning telephony service includes assigning a toll-free telephone number to a customer account for a customer of a telecommunications provider, distributing the toll-free telephone number and an access number to the customer along with an invitation to provision a toll-free telephone number service, and receiving, at a local exchange carrier switch, a call from the customer. The access number is identified by the local exchange carrier switch for the call in response to performing a call number translation. The telephony service also includes accessing, by a server, the toll-free telephone number identified for the customer account and generating a provisioning order that includes a customer telephone number from the customer account and the toll-free telephone number. The telephony service further includes transmitting the provisioning order to a service control server, the service control server activating the toll-free telephone number for the customer account.

Abstract: A method is provided for authorizing an authenticated user into a teleconference session as a participant that avoids some of the costs and disadvantages of doing so in the prior art. The authorization is a combination of the enterprise user's authentication at work and cryptographic authorization to the teleconference system by the inviter. When a user goes to work and connects with his or her office computer to the network of the user's employer, a secure single sign-on (SSO) access control procedure is executed. In a secure single sign-on (SSO) access control procedure, the user submits authentication information, such as a user name and password, to an identity provider and receives back a credential token when the identity provider determines that the user name/password pair is valid. The credential token is saved on the user's computer and used for further authentication.

Abstract: A conference call system comprises an input interface for receiving during a conference call at least two input streams of audio signal, each from another source. A selection unit is connected to the input interface, for selecting a number of dominant speaker streams out of the input streams, the number being less than or equal to a maximum number of dominant speakers value and each of the dominant speaker streams representing speech from a respective dominant speaker. A mixer is connected to the selection unit, for mixing the selected streams into an output stream. The conference call system comprises an output interface for outputting the output stream and a selection control unit connected to the selection unit and the input interface, for dynamically setting, during the conference call, the maximum number of dominant speakers value based on dynamics of the conference call.

Abstract: Methods and devices for controlling a set-up of a call from a calling entity (CE201) to a called entity in a telecommunications network are described. The telecommunications network comprises a service control entity (SCE205) and a service switching entity (SSE204). The service control entity (SCE205) is adapted to perform the steps of receiving from the service switching entity (SSE204) an indication that the first call attempt failed, receiving from the service switching entity (SSE204) an indication of the further call attempt, obtaining call information related to the first call attempt, determining a call establishment procedure for the further call attempt based on the call information related to the first call attempt, sending an instruction to the service switching entity (SSE204) to continue the set-up of the further call attempt according to the call establishment procedure.

Abstract: Certain embodiments of the present invention employ targeted speech detection as part of end-of-hold detection in an end-of-hold notification system. The targeted speech detector is configured to be particularly sensitive to specific words or phrases so as to increase the likelihood of detecting a correct end-of-hold condition while reducing the likelihood of false end-of-hold detection. Targeted speech detection may be used along with other detection mechanisms such as DTMF detection and/or background noise detection.

Abstract: A method includes accessing information associated with a call at an attendant interaction module. The call is associated with a task. The information associated with the call includes a first action object identifier, a first result identifier, and a first reason identifier. The first action object identifier is associated with the task, the first result identifier indicates a status of the task, and the first reason identifier includes information related to the first result identifier. The method includes generating an attendant interaction signal subsequent to receiving the information associated with the call.

Abstract: This document discusses, among other things, a networked contact center that includes multiple platforms to host multiple tenants. Example embodiments include receiving a message associated with one of the tenants and identifying one or more of the platforms associated with the message. For some example embodiments, the networked contact center may allow the platform to access a data location that is both associated with the tenant and shared by two or more of the multiple tenants.

Abstract: A queueless contact center is described along with various methods and mechanisms for administering the same. The contact center proposed herein provides the ability to, among other things, achieve true one-to-one matching. Solutions are also provided for managing data structures utilized by the queueless contact center. Furthermore, mechanisms for generating traditional queue-based performance views and metrics for the queueless contact center are proposed to help facilitate a smooth transition from traditional queue-based contact centers to the next generation contact centers described herein.

Abstract: An adaptive hybrid system is coupled to a loop for adjusting trans-hybrid loss. The system comprises a fixed portion comprising a first receiver transfer function block and a first hybrid transfer function block. The fixed portion is configured to receive a far-end signal and mitigate frequency dependent attenuation experienced by the far-end signal. The system also comprises a variable portion comprising a second receiver transfer function block and a second hybrid transfer function block configured to subtract a transmit echo from the received far-end signal.

Abstract: Methods and systems for updating the adaptive filter of an echo canceller. A method of updating the adaptive filter of an echo canceller in which an estimated echo is resolved from a received signal and then subtracted from an incoming echo-contaminated signal so as to produce a filtered output signal, includes: obtaining a corrected impulse response of an echo reconstruction filter (ERF); calculating specified decision measures usable to decide whether to prospectively apply the corrected ERF impulse response or a current ERF impulse response; determining whether application of the corrected ERF impulse response would result in improved echo cancellation; and updating the ERF to apply the corrected impulse response, when it is determined that the updating would result in a lower residual echo.

Abstract: Systems and methods provide multiple partitions hosted on an isolation technology such as a hypervisor where at least one of the partitions, a local secure service partition (LSSP), provides security services to other partitions. The service partitions (LSSPs) host those high assurance services that require strict security isolation, where the service can be shared across partitions and accessed even when the user is not connected to a network. The LSSP also can certify the results of any computation using a key signed by a TPM attestation identity key (AIK), or other key held securely by the hypervisor or a service partition. The LSSPs may be configured to provide trusted audit logs, trusted security scans, trusted cryptographic services, trusted compilation and testing, trusted logon services, and the like.

Abstract: A method and system are provided for atomicity for elliptic curve cryptosystems (ECC-systems). The method includes a side channel atomic scalar multiplication algorithm using mixed coordinates. The mixed coordinates are chosen based on a ratio of I/M where I and M are the time required to execute an inversion and a multiplication in the ground field respectively. If the I/M ratio is less than 60, a mixture of affine and Jacobian coordinates are used during scalar multiplication. If the I/M ratio is 60 or more, a mixture of Chudnovsky-Jacobian and Jacobian coordinates are used during scalar multiplication. The method is optimized for elliptic curves over Fp defined by an equation of the form y2=x3+ax+b, where a, b?Fp, having a=?3.

Abstract: The present invention provides a flexible encryption device, comprising N encryption units connected in series for encrypting N-bit input data, each one of the N encryption units further comprising an exclusive-OR gate for receiving an input data; and a flip-flop connected coupled to the exclusive-OR gate. Furthermore, the present invention also provides the data transferring system that can be easily modified without the needs of manual intervention.

Abstract: A spread scrambled multiple access (SSCMA) scheme is described. A first encoded bit stream of a first terminal is scrambled according to a first scrambling signature. A second encoded bit stream of a second terminal is scrambled according to a second scrambling signature. The first scrambled bit stream is spread to match a communication channel bandwidth. The second scrambled bit stream is spread to match the communication channel bandwidth.

Abstract: A cipher processing apparatus for arithmetic operations of an FO function and an FL function comprising: an FL function operating unit for generating a 2N-bit output based on a first extension key; a partial function operating unit for generating an N-bit output based on second and third extension keys; an N-bit intermediate register for storing an output of the partial operating unit; a 2N-bit first data register for storing data based on the output of the FL function operating unit; and a controller for making the partial function operating unit perform six cycles, inputting an output of the intermediate register to the FL function operating unit, and storing the data based on the output of the FL function operating unit in the first data register, in a first case in which the FL function uses a result of an arithmetic operation of the FO function.

Abstract: An encryption/decryption method comprises by using a generalized Feistel structure in which data is divided into n pieces and mixing processing with key data is performed, diffusion processing, in which data transformation via linear operation is executed, is performed at least once between rounds of the generalized Feistel structure, wherein. As the diffusion processing, linear transformation is performed in which each of n pieces of output data is operated on by two or more pieces of input data. The method is adapted for encryption or decryption.

Abstract: An elliptic curve cryptographic system where point coordinates are transformed from a first coordinate system to a second coordinate system. The transformed coordinates are processed by field operations, which have been modified for operating on the transformed point coordinates. In some implementations, the point coordinates are transformed from an affine coordinate system to a projective coordinate system using a non-random value for the projective coordinate. In some implementations, the transformed projective representation of the point can be changed from a first representation of the point in projective coordinates to a second representation of the point in projective coordinates, where the projective coordinate used in the representation change is a random value.

Abstract: A method and a system allow accessing several of a user's controlled access accounts by presenting the credentials of only one of the accounts. The method may include (a) storing the credentials for each of the user's accounts; (b) receiving from the user credentials corresponding to any of the user's accounts; (c) presenting the received credentials to access the corresponding account; and (d) upon successful access of the corresponding account, using the stored credentials to access one or more of the user's accounts without requiring the user to present the corresponding credentials. For each of the user's accounts, the credentials are stored encrypted, using a randomly generated key, common to all the encrypted credentials. In addition, the randomly generated key is encrypted using the credentials of each of the accounts. In that manner, plain-text copies of neither the random key nor the credentials of the accounts need to be stored.

Abstract: Electronic devices and methods are disclosed to provide and to test a physically unclonable function (PUF) based on relative threshold voltages of one or more pairs of transistors. In a particular embodiment, an electronic device is operable to generate a response to a challenge. The electronic device includes a plurality of transistors, with each of the plurality of transistors having a threshold voltage substantially equal to an intended threshold voltage. The electronic device includes a challenge input configured to receive the challenge. The challenge input includes one or more bits that are used to individually select each of a pair of transistors of the plurality of transistors. The electronic device also includes a comparator to receive an output voltage from each of the pair of transistors and to generate a response indicating which of the pair of transistors has the higher output voltage.

Abstract: Hierarchical cryptography expressed in a general semiordered structure other than a tree structure is implemented. In information generation, random numbers ?v and (?vj)j?w(v)?Zq are generated; main information kv=?v?i?{1, . . . , N-1}\w(v)vibi*+bN* is calculated; and derivation information kvj=?vj?i?{1, . . . , N-1}\w(v)vibi*+bj* is calculated for each j?w(v). In information derivation, random numbers ?u and (?uj)j?w(u)?Zq are generated; main information ku=?u?i?w(v)\w(u)uikvi+kv is calculated; and derivation information kuj=?uj?i?w(v)\w(u)uikvi+kvj is calculated for each j?w(v).

Abstract: Arbitrary numerical distributions are presented for use in devices having limited processing and storage capabilities by having the device accept strings of arbitrarily distributed numbers from a source outside of the device. In one embodiment, a master controller creates a table of values which follow the desired minimum, maximum, mean, and standard deviation, etc. of the particular desired statistical distribution required. The created table is then communicated to the limited capacity device and can be used whenever a distribution of random values is required. The master controller could have one of several slave devices associated with it in the system. In another embodiment, where the storage capability of the device is large enough to store a table of values with sufficient different entries to create a distribution of satisfactory “randomness” for the particular application, a random number generator within the device is used to select the order of presentation of the table of values.

Abstract: The present invention relates to data rights management and more particularly to a secured system and methodology and production system and methodology related thereto and to apparatus and methodology for production side systems and are consumer side systems for securely utilizing protected electronic data files of content (protected content), and further relates to controlled distribution, and regulating usage of the respective content on a recipient device (computing system) to be limited strictly to defined permitted uses, in accordance with usage rights (associated with the respective content to control usage of that respective content), on specifically restricted to a specific one particular recipient device (for a plurality of specific particular recipient devices), or usage on some or any authorized recipient device without restriction to any one in specific, to control use of the respective content as an application software program, exporting, modifying, executing as an application program, viewing,

Abstract: A digital TV conditional access system having an authentication module, a conditional access front-end module, and a receiver module. The authentication module communicates bidirectionally with and authenticates the receiver module to generate a unique ID number and authentication information, the ID number and the authentication information being recorded to a data base. The conditional access front-end module communicates bidirectionally with the data base, collects information of the receiver module from the data base, encrypts entitlement management message of the receiver module, and transmits the encrypted entitlement management message to the receiver module by an addressing mode. The conditional access front-end module further includes an entitlement control message generator, and the receiver module receives a scrambled program with the help of the ID number and the authentication information.

Abstract: User rating data may be received at a correlation engine through a network. The user rating data may include ratings generated by a plurality of users for a plurality of items. Correlation data may be generated from the received user rating data by the correlation engine. The correlation data may identify correlations between the items based on the user generated ratings. Noise may be generated by the correlation engine, and the generated noise may be added to the generated correlation data by the correlation engine to provide differential privacy protection to the user rating data.

Abstract: For a defined cryptographic process including an original substitution table, split masked substitution tables are provided to resist cryptographic attacks. The split masked substitution tables are defined with reference to a set of random value data words and a mask value. An entry in the split masked substitution tables is defined by selecting bits from the corresponding entry in the original masked substitution table, as masked by the corresponding one of the set of random value data words and by selecting bits from the corresponding one of the set of random value data words as masked by the mask value. The split masked substitution tables are usable in a modified cryptographic process based on the defined cryptographic process to permit a masked output to be generated. The split masked substitution tables are refreshed by each entry in the tables being refreshed upon access during execution of the modified cryptographic process.

Abstract: An apparatus and methods of securely communicating a message between a first device and a second device using a message specific identifier is disclosed. The method begins by receiving an encryption key request from a sending device, where the encryption key request is based upon the message specific identifier, which is associated with a plurality of attributes associated with the message and the sending device. In more detail, the message specific identifier may be an information-based indicator that is unique with respect to the message and the sending device. The method parses the encryption key request and the message specific identifier to provide an intermediate argument used to enter a current random character set that is periodically generated and stored into memory. The intermediate argument helps identify which type of encryption method is desired for use in encryption key generation.

Abstract: Disclosed is a system for transmitting encrypted broadcast signals to different transmitters on a single frequency network (SFN) in a digital broadcasting system. The system for transmitting encrypted broadcast signals on the SFN includes: a main broadcasting system for transmitting encrypted broadcast signals including data streams and transmitter identification information (TII) through a main broadcasting network; a repeating system for amplifying encrypted broadcast signals of the main broadcasting network and transmitting the amplified broadcast signals, or modulating and amplifying streams input by the main broadcasting system through a private line and repeating broadcast signals of the main broadcasting system through a repeating network; and a decrypting key provider for receiving a decrypting key value from the main broadcasting or repeating system and transmitting a user authentication and decrypting key to a charged subscriber terminal through a mobile communication network.

Abstract: A method of providing virtual Wi-Fi service with accounting and authentication control via a virtual Wi-Fi access network is provided. The method comprises: connecting a subscriber to the virtual Wi-Fi access network, wherein the virtual Wi-Fi access network comprises a plurality of individual Wi-Fi access points in communication with at least one virtual Wi-Fi access server; prompting the subscriber for an account ID and password; performing subscriber authentication at the virtual Wi-Fi access server; where the subscriber has been authenticated, establishing a Wi-Fi session for the subscriber in the virtual Wi-Fi access network and applying an accounting function to the Wi-Fi session; and notifying the virtual Wi-Fi access server when the subscriber exits from the virtual Wi-Fi network.

Abstract: A home wireless router establishes a Wireless Local Area Network (WLAN) that supports wireless communications within a WLAN service area. The home wireless router establishes broadband communications via a broadband connection with a VoIP service accumulator. The home wireless router services a plurality of wireless terminals within the WLAN service area, including at least one Voice over Internet Protocol (VoIP) wireless terminal. The home wireless router determines that a VoIP wireless terminal desires VoIP call servicing determines a WLAN encryption scheme supported by the VoIP wireless terminal, sets up, and services the VoIP call via the WLAN and the broadband connection. Servicing includes terminating the WLAN encryption scheme supported by the VoIP wireless terminal to protect the VoIP call as it is wirelessly serviced by the WLAN and terminating a broadband encryption scheme supported by the broadband connection to protect the VoIP call as it is serviced by the broadband connection.

Abstract: A system for creating a secure key is provided that includes a computer processor and an application configured to execute on the computer processor, the application implementing a method that includes creating a token and populating a key control information section of the token with a value to indicate a minimum number of key parts used to form a key. Creating the secure key also includes populating a payload section of the token with a first key part, binding the key control information section to the payload section, adding a second key part to the first key part and iterating the value and binding the key control information section to the payload section after the second key part has been added. Creating the secure key further includes indicating the key is complete, wherein the key comprises a combination of the first and second key parts.

Abstract: An encoding/decoding operation portion includes an encoding/decoding operation circuit and an avoiding path for detouring the encoding decoding operation circuit and can select between encoding or decoding input data in the encoding/decoding operation circuit and detouring the encoding/decoding operation circuit to output the input data without change. Only one wire has to be provided from a selector to a key storage portion and an initialization-vector storage portion. With this construction, it is possible to realize an encoding/decoding circuit which can suppress an increase in the number of wires used to transmit a content of key data to the key storage portion and the initialization-vector storage portion and does not cause complication of circuit layout.

Abstract: Creating a secure key includes creating a token and populating a key control information section of the token with a value to indicate a minimum number of key parts used to form a key. Creating the secure key also includes populating a payload section of the token with a first key part, binding the key control information section to the payload section, adding a second key part to the first key part and iterating the value and binding the key control information section to the payload section after the second key part has been added. Creating the secure key further includes indicating the key is complete, wherein the key comprises a combination of the first and second key parts.

Abstract: A system and method of providing content protection for OMA Broadcast smartcard profiles. When an electronic device has a content item for encryption, the device generates a random number. The electronic device then transmits a content encryption key request message, including the random number and a service encryption key identifier, to a smartcard, which then responds with a a content encryption key response message. The content encryption key response message includes the random number and a content encryption key. The electronic device can then use the content encryption key to manage the encryption of the content item. The electronic device stores random number, service key identifier and encrypted content item into a certain file format. The electronic device sends again content encryption key request at the time of rendering. The content encryption key returned by the content encryption key response message is used for the decryption of the stored content item.

Abstract: The present invention relates to a method and system for providing a digital content service that provides packaging content consisting of digital rights management (DRM) content and advertisement content, and is able to use the DRM content for free by watching or listening to the advertisement content, including: generating packaging content consisting of pilot content and target content, which has been encrypted using an encryption key of the pilot content, and providing the packaging content to a portable terminal; and obtaining a decryption key for the target content through playing the pilot content of the packaging content, and playing the target content by the decryption key, by the portable terminal.

Abstract: Methods and apparatus for generating, communicating, and/or using sets of addresses corresponding to a communications device are described. A first communications device generates, from a public key and a random number, both a first address and a second address. The generated address pair is communicated to a second communications device along with proof of ownership information regarding the address pair via an address signaling message such as a binding update message. The second communications device processes the received address signaling message and determines address pair validity and/or address pair ownership information. The first address may be associated with a first network, e.g., an unsecure WAN network, while the second address may be associated with a second network, e.g., a secure peer to peer network. Decisions on switching between using the first address to using the second address may be based on address validity and/or address ownership determinations.

Abstract: Provided are a method and apparatus for transmitting digital multimedia broadcasting data, and a method and apparatus for receiving digital multimedia broadcasting data. A basic audio signal and a multichannel audio signal are encoded to generate a basic audio stream and a multichannel audio stream, and a first data stream describing property and position data of the basic audio stream and a second data stream describing property and position data of the multichannel audio stream are transmitted as independent streams. According to the performance of the receiving apparatus, an audio signal may be decoded by using just the first data stream only or both the first data stream and the second stream.

Abstract: A receiving apparatus includes: a local oscillator to output first- and second-local-oscillator signals whose phases are orthogonal to each other; a mixer to output first- and second-intermediate-frequency signals; a first filter to allow a component from a desired signal to pass therethrough, and eliminate a component from an image signal having a frequency symmetrical with that of the desired signal, in the first- and second-intermediate-frequency signals; a second filter to allow a component from the image signal to pass therethrough, and eliminate a component from the desired signal, in the first- and second-intermediate-frequency signals; a comparator to compare levels between output signals of the first and second filters; and a control unit to switch a frequency of the first- and second-local-oscillator signals to a difference frequency between a frequency of the desired signal and the intermediate frequency or a sum frequency thereof, according to a comparison result of the comparator.

Abstract: The present invention describes techniques that can be used to provide novel methods of spatial audio rendering using adapted M-S matrix shuffler topologies. Such techniques include headphone and loudspeaker-based binaural signal simulation and rendering, stereo expansion, multichannel upmix and pseudo multichannel surround rendering.

Abstract: A decoded sound analysis unit (104) calculates, regarding the frequency-region stereo signals L(b) and R(b) decoded by the PS decoding unit (103), a second degree of similarity (109) and a second intensity difference (110) from the decoded sound signals. A spectrum correction unit (105) detects a distortion added by the parametric-stereo conversion by comparing the second degree of similarity (109) and the second intensity difference (110) calculated at the decoding side with the first degree of similarity (107) and the first intensity difference (108) calculated and transmitted from the encoding side, and corrects the spectrum of the frequency-region stereo decoded signals L(b) and R(b).

Abstract: An audio output controlling apparatus and method, and a mobile terminal system using the same control settings of an audio out port according to whether an audio frame includes an audio signal. The audio output controlling method includes receiving an audio frame, determining whether an audio signal is included in the audio frame, and setting, depending on whether the audio signal is included in the audio frame, a power voltage provided to an audio out port. The mobile terminal includes a wireless transceiver; an audio unit, through an audio out port, an audio frame among the wireless data; and an audio output controlling unit to control a power voltage of the audio out port. The apparatus includes a section determining unit; and a power controlling unit to set a power voltage provided to an audio out port according to whether the audio signal is included in the audio frame.

Abstract: A vehicle sound generator system is configured to generate a signal configured to drive one or more speakers produce sound waves simulating sounds associated with a desired engine type. The signal is based on one or more operating conditions of a vehicle. The vehicle sound generator system is configured to select sounds from a plurality of sounds based on the operating conditions of the vehicle. Each sound corresponds to a simulated sound of an engine operating in a respective gear. The vehicle sound generator system may generate the signal to drive the speakers to produce selected sounds to simulate shifting between the respective gears.

Abstract: The invention converts non audio systems into distributed audio sources for active noise control solutions. The system transforms non acoustic structures into soundboards using inertial type acoustic transducers. Acoustic parameters unique for each application due to the variation in properties of the sound board are compensated by equalizers. The invention also uses damping means to limit the reflection of bending waves from the edges. The inertial type acoustic transducer is driven by an amplifier. The acoustic signal to the amplifier is modified by a signal conditioner to compensate for the non optimal response of the acoustic system. An external controller communicates with the amplifier to control its operating parameters. A series of distributed audio sources in a variety of positions may each be addressable as a node on a network wherein noise detected at that source is analyzed and the system generates sound at that source to mask the noise.

Abstract: An electronic device includes an audio jack, a power supply unit, a determining circuit, and an executing circuit. The audio jack may be arranged for transmitting an audio input signal, and the electronic device may be configured to connect with an audio accessory via the audio jack. When the audio accessory may be connected to the electronic device, the power supply unit provides a first voltage to the audio jack and a second voltage. The determining circuit determines whether to trigger an interrupt request according to the second voltage and a third voltage, wherein the third voltage may be coupled to the audio jack and may be generated according to the first voltage. The executing circuit may be coupled to the determining circuit, for determining whether to execute a corresponding function according to the third voltage when the interrupt request may be received.