A protection circuit for use with an electronic DSL component having a tip connection and a ring connection, the protection circuit including: a first unidirectional transient-voltage-suppression (TVS) diode, having a negative TVS breakdown voltage BDV and diode forward voltage DV clamp, connected between Vcc and the tip connection of the DSL component; a second unidirectional TVS diode, having a diode forward voltage DV, connected between the tip connection of the DSL component and a negative ground clamp node; a third unidirectional TVS diode, having a negative TVS breakdown voltage BDV and diode forward voltage DV clamp, connected between Vcc and the ring connection of the DSL component; and a fourth unidirectional TVS diode, having a diode forward voltage DV, connected between the ring connection of the DSL component and the negative ground clamp node.

A protection circuit for use with an electronic DSL component having a tip connection and a ring connection, the protection circuit including: a first unidirectional transient-voltage-suppression (TVS) diode, having a negative TVS breakdown voltage BDV and diode forward voltage DV clamp, connected between Vcc and the tip connection of the DSL component; a second unidirectional TVS diode, having a diode forward voltage DV, connected between the tip connection of the DSL component and a negative ground clamp node; a third unidirectional TVS diode, having a negative TVS breakdown voltage BDV and diode forward voltage DV clamp, connected between Vcc and the ring connection of the DSL component; and a fourth unidirectional TVS diode, having a diode forward voltage DV, connected between the ring connection of the DSL component and the negative ground clamp node.

Systems and methods according to one or more embodiments are provided for a hum reduction circuit implemented to provide a ground path between an audio generating device and a powered headset. In one example, a system includes a jack configured to accept a plug comprising a first electrical ground connection. The system also includes a switch coupled to the jack at a first end and coupled to second electrical ground connection at a second end. The system also includes the switch is configured to couple to the first electrical ground at the first end. The system further includes a bias control signal coupled to the switch, configured to control a switch bias, where a first switch bias electrically couples the first electrical ground to the second electrical ground, and a second switch bias electrically decouples the first electrical ground from the second electrical ground.

There are disclosed devices, system and methods for desired signal spotting in noisy, flawed environments by identifying a signal to be spotted, identifying a target confidence level, and then passing a pool of cabined arrays through a comparator to detect the identified signal, wherein the cabined arrays are derived from respective distinct environments. The arrays may include plural converted samples, each converted sample include a product of a conversion of a respective original sample, the conversion including filtering noise and transforming the original sample from a first form to a second form. Detecting may include measuring a confidence of the presence of the identified signal in each of plural converted samples using correlation of the identified signal to bodies of known matching samples. If the confidence for a given converted sample satisfies the target confidence level, the given sample is flagged.

There are disclosed devices, system and methods for desired signal spotting in noisy, flawed environments by identifying a signal to be spotted, identifying a target confidence level, and then passing a pool of cabined arrays through a comparator to detect the identified signal, wherein the cabined arrays are derived from respective distinct environments. The arrays may include plural converted samples, each converted sample include a product of a conversion of a respective original sample, the conversion including filtering noise and transforming the original sample from a first form to a second form. Detecting may include measuring a confidence of the presence of the identified signal in each of plural converted samples using correlation of the identified signal to bodies of known matching samples. If the confidence for a given converted sample satisfies the target confidence level, the given sample is flagged.

A position detection method may include obtaining voice signals during a voice call by at least two voice collecting devices; obtaining position energy information of the voice signals; and identifying a position of the terminal device relative to a user during the voice call, from predefined positions based on the position energy information.

Disclosed are systems and methods for a frontend capture module of a video conferencing application, which can modify an input signal, received from a microphone device to match predetermined signal characteristics, such as voice signal level and expected noise floor. An Input stage, a suppression module and an output stage amplify the voice signal portion of the input signal and suppress the noise signal of input signal to predetermined ranges. The input stage selectively applies gains defined by a gain table, based on signal level of the input signal. The suppression module selectively applies a suppression gain to the input signal based on presence or absence of voice signal in the input signal. The output stage further amplifies the input signal in portions having a voice signal and applies a gain table to maintain a consistent noise floor.

The present subject matter relates to one or more devices, systems and/or methods for generating sealing current at a customer's premises or residence and injecting the sealing current into a DSL service provider's telephone cables to prevent the oxidation or corrosion of wire splices or connections on the telephone cables transporting DSL services. A cable pair stabilizer unit is connected at the customer's premises or residence, between the service provider's telephone cables and the customer's residential gateway/modem. The cable pair stabilizer unit comprises circuitry for generating the sealing current and for injecting the sealing current into the service provider's telephone cables transporting DSL services. The cable pair stabilizer unit may be combined with an AC/DC power supply adapter as a single, integrated device. The cable pair stabilizer unit may alternatively be combined with or inside of the Residential Gateway as a single, integrated device.

The present subject matter relates to one or more devices, systems and/or methods for generating sealing current at a customer's premises or residence and injecting the sealing current into a DSL service provider's telephone cables to prevent the oxidation or corrosion of wire splices or connections on the telephone cables transporting DSL services. A cable pair stabilizer unit is connected at the customer's premises or residence, between the service provider's telephone cables and the customer's residential gateway/modem. The cable pair stabilizer unit comprises circuitry for generating the sealing current and for injecting the sealing current into the service provider's telephone cables transporting DSL services. The cable pair stabilizer unit may be combined with an AC/DC power supply adapter as a single, integrated device. The cable pair stabilizer unit may alternatively be combined with or inside of the Residential Gateway as a single, integrated device.

There are disclosed devices, system and methods for desired signal spotting in noisy, flawed environments by identifying a signal to be spotted, identifying a target confidence level, and then passing a pool of cabined arrays through a comparator to detect the identified signal, wherein the cabined arrays are derived from respective distinct environments. The arrays may include plural converted samples, each converted sample include a product of a conversion of a respective original sample, the conversion including filtering noise and transforming the original sample from a first form to a second form. Detecting may include measuring a confidence of the presence of the identified signal in each of plural converted samples using correlation of the identified signal to bodies of known matching samples. If the confidence for a given converted sample satisfies the target confidence level, the given sample is flagged.