Abstract: Provided is method for automatic audio gain modulation and a related apparatus. In order to prevent the unstable signals as continuously increasing or decreasing the gain when the signals hover around an upper threshold, it's featured that the method is to predict the signal intensity as pre-adding a predict gain in a hold time before outputting signals. By determining whether the prediction exceeds a predetermined threshold or not, the suitable and adjustable gains can be obtained without exceeding the predetermined threshold. In the automatic gain control mechanism, it's to decrease the gain gradually as automatically entering an attack time, or to increase the gain gradually as performing a conventional auto-gain control procedure including entering a release time. The claimed method can modulate the gain automatically by predicting the gain, and confine the signals under a threshold. In addition to avoid sawtooth phenomena, the method can stabilize the signals.

Abstract: An audio signal transmission apparatus avoiding noise generation is applied to a game platform functions by executing a recording process, and comprises: an analog-to-digital converter, an intermediary processing unit, a counter, and a controlling unit. The analog-to-digital converter is used for converting an analog audio signal to a first digital audio signal. The intermediary processing unit is connected with the analog-to-digital converter for transmitting the first digital audio signal. The counter controls the intermediary processing unit to output the first digital audio signal after counting a specific time. The controlling unit, connected with the counter and the intermediary processing unit, is used for transmitting the first digital audio signal to the game platform. Therefore, the present invention can achieve the purpose for avoiding noise generation when the audio signal transmission apparatus plugs into the game platform.

Abstract: A voltage amplitude limiting circuit of a full differential circuit is provided for limiting voltage levels of a differential signal. The voltage amplitude limiting circuit includes a reference voltage generating unit and a replacing circuit. The reference voltage generating unit generates a high reference voltage and a low reference voltage. The replacing circuit is coupled to the reference voltage generating unit, a first input terminal and a second input terminal. When voltage at the first input terminal is greater than the high reference voltage, the replacing circuit uses the high reference voltage to replace the voltage at the first input terminal to serve as an output. When voltage at the first input terminal is less than the low reference voltage, the replacing circuit uses the low reference voltage to replace the voltage at the first input terminal to serve as an output.

Abstract: Disclosed herein are system, method and apparatus with environmental noise cancellation. The instant disclosure is particularly adapted to a receiver module having at least two inputs. The two inputs respectively receive a main audio portion and the audio with majority of environmental noise. The system firstly calibrates the audio signals to reduce the error caused by the difference between the two inputs. An adaptive beamforming technology and a speech extractor are respectively used to extract the environmental noise portion with less main audio and the main audio portion with less noise. After a process of time-to-frequency domain transformation, a non-linear noise suppression technology is introduced into estimating the environmental noise and acquiring a gain. After noise suppression processed with the gain, a sequence of audio signals is output after a frequency-to-time domain transformation.

Abstract: Disclosed is a method for providing background sound to a communication device and a system applying the method. The method is preferably applied to a voice communication procedure. In the meantime, a background sound is simultaneously played with a telephone call according to a user's selection or a sound schedule. In accordance with an embodiment, the steps in the method firstly include a step of receiving a call, and a step of activating a noise-suppression function and a background-sound enabling procedure. The background-sound enabling procedure is conducted to play the background sound at the time of the call based on the user's selection, or a sound schedule. In particular, the user can decide to play or not to play the background sound while phoning in the beginning. At last, the method ends the voice communication procedure with or without the background sound after hanging up the phone.

Abstract: Provided is method for automatic audio gain modulation and a related apparatus. In order to prevent the unstable signals as continuously increasing or decreasing the gain when the signals hover around an upper threshold, it's featured that the method is to predict the signal intensity as pre-adding a predict gain in a hold time before outputting signals. By determining whether the prediction exceeds a predetermined threshold or not, the suitable and adjustable gains can be obtained without exceeding the predetermined threshold. In the automatic gain control mechanism, it's to decrease the gain gradually as automatically entering an attack time, or to increase the gain gradually as performing a conventional auto-gain control procedure including entering a release time. The claimed method can modulate the gain automatically by predicting the gain, and confine the signals under a threshold. In addition to avoid sawtooth phenomena, the method can stabilize the signals.

Abstract: An auto-execution signal processing method and an apparatus performing the method are provided. That method is particularly applied to the apparatus supporting recognition of a human interface device standard. The apparatus preferably has an activation element such as a button, and it is to execute an automatic execution process by a key-activation manually or automatically as in connection with a computer system. Therefore, a predetermined purpose is met. According to a preferred embodiment, the apparatus having the auto-execution function is firstly initialized. Next, the activation element thereon is used to launch the automatic execution process. The process includes a step of driving a Finite State Machine to transfer an executable string of code to a computer system via a connection interface. After that, the executable string is compiled by an operating system in order to launch an application, such as entering a proprietary webpage.

Abstract: A video and audio signal processor includes a game engine interface mechanism, a video mechanism, a video card, an integration mechanism and a sound effect card. The game engine interface mechanism provides graphic parameters and original sound effect parameters. The video mechanism receives the graphic parameters from the game engine interface and provides video data based on the graphic parameters. The video card receives the video data from the video mechanism and instructs a display to provide images based on the video data. The integration mechanism receives the graphic parameters and the original sound effect parameters from the game engine interface mechanism, analyzes the graphic parameters to derive desired sound effect parameters and integrates the desired sound effect parameters with the original sound effect parameters. The sound effect card instructs at least one speaker to provide sounds under the control of the integration mechanism.

Abstract: An audio signal transmission apparatus avoiding noise generation is applied to a game platform functions by executing a recording process, and comprises: an analog-to-digital converter, an intermediary processing unit, a counter, and a controlling unit. The analog-to-digital converter is used for converting an analog audio signal to a first digital audio signal. The intermediary processing unit is connected with the analog-to-digital converter for transmitting the first digital audio signal. The counter controls the intermediary processing unit to output the first digital audio signal after counting a specific time. The controlling unit, connected with the counter and the intermediary processing unit, is used for transmitting the first digital audio signal to the game platform. Therefore, the present invention can achieve the purpose for avoiding noise generation when the audio signal transmission apparatus plugs into the game platform.

Abstract: The present invention discloses a voltage detection type overcurrent protection device, which applies to the output stage of a CMOS Class-D audio amplifier. Generally, a Class-D audio amplifier is used to drive a high-load loudspeaker; therefore, it needs a high-current driver. When there is a short circuit in the load, the high current will burn out the driver stage. The present invention detects the output voltage to indirectly monitor whether the output current is too large. Once an overcurrent is detected, the output-stage transistor is turned off to stop high current lest the circuit be burned out.

Abstract: The conventional apparatus for reading/writing storage devices need a built-in microprocessor control unit (MCU) to process commands. Thus, the flexiability (e.g.: supporting capacity of storage device) and the cost of the apparatus are not satisfied. The present invention employs a driver and a hardwire circuit to replace the MCU for money saving without changing other units in the apparatus. Moreover, the apparatus of the present invention can raise the supporting capacity of storage device and compatibility by just updating the driver.

Abstract: The scheme for detecting the plug-in status by using single bit generated by a network with serial resistors, comprising a plurality of jacks having a spring switch, wherein the number of the plurality of jacks can be selected depending on the demand and a plurality of resistors followed the spring switch and connected in serial. Output voltage-generating resistor is coupled to the plurality of resistors in parallel to obtain the output voltage, thereby determining the plug-in status. Wherein the plurality of jacks and the plurality of resistors construct a multi-jack network, a first terminal of the multi-jack network refers to a common node between a first connecting terminals of the spring switch of the plurality of jacks and a first resistor of the plurality of resistors, the first terminal being coupled to a first reference voltage, a second terminal of the multi-Jack network refers to a common node between the second connecting terminals of the last jack and the last resistor.

Abstract: A method of performing sound effect comprising providing a headphone-like or earphone-like device with rear speakers carried therein, wherein the headphone-like or earphone-like device includes an opening for receiving the front speaker signal. Then, the signal is transmitted to the front, rear and sub-woofer signal to associated speakers. The signal to the rear speakers is processed by HRTF and means for creating virtual speakers to obtain virtual speakers of the rear side. The processed signal is transmitted to the rear speaker.

Abstract: A method of performing sound effect comprising providing a headphone-like or earphone-like device with rear speakers carried therein, wherein the headphone-like or earphone-like device includes an opening for receiving the front speaker signal. Then, the signal is transmitted to the front, rear and sub-woofer signal to associated speakers. The signal to the rear speakers is processed by HRTF and means for creating virtual speakers to obtain virtual speakers of the rear side. The processed signal is transmitted to the rear speaker.

Abstract: A control method for controlling the sound effect system, comprises implanting a control code into a sound effect data that is transmitted to a sub woofer speaker. Then, the sound effect data with the control code is transmitted to the sound effect system. Next step is to control speakers of the sound effect system by means of the control code. Wherein a data transmission frame between the sound effect system and a computer system for controlling the sound effect system comprises a plurality of bit cells, wherein the data transmission frame includes: a sound effect data transmitted by a data bit; and a control code transmitted by a control bit.

Abstract: Means for compensating rear sound effect, comprising a headphone-like or an earphone-like device with rear speakers carried therein, the headphone-like or earphone-like device including an opening for receiving the front speaker signal, wherein the headphone-like or the earphone-like device includes a housing for receiving the rear speakers, wherein the housings opposite each other, the two housings being joined by a headband, to compose the headphone-like structure; an input plug with conductive wire connected to the housing; and wherein the earphone-like or headphone-like device cannot cover the whole ear for receiving the sound from the front speakers and sub-woofer speaker, the opening allowing the ears to listen the sound from the front speakers, the rear speakers being respectively located on both sides of the earphone-like or headphone-like device to provide virtual speaker of rear side without losing rear bass.

Abstract: System of multi-channel shared resistor-string digital-to-analog converters comprises a time-sharing interpolator converting the multi-channel digital audio input at low sample rate to the multi-channel digital audio output at high sample rate, a time-sharing sigma-delta modulator modulating the multi-channel digital audio input with a long sample wordlength from the interpolator to be a multi-channel digital audio output with a shorter sample wordlength, multi-channel shared resistor-string digital-to-analog converters converting the multi-channel digital audio input to be a multi-channel staircase analog signal output, and one low-order RC filter for each channel further attenuating the out-of-band noise in the analog staircase analog output, especially the high-frequency residue images.

Abstract: A self-balanced active current bridge for measuring the impedance of an external device or an output current, including an input potential source and operation amplifier connected to the input potential source via a first input terminal of the operation amplifier. A balancing bridge is coupled to a first output terminal and a second output terminal of the operation amplifier. A controlled potential source is coupled to the balancing bridge and used to maintain the balance state of the balancing bridge. A resistance is connected between the balancing bridge and an output terminal of the controlled potential source. Wherein the external device is connected a first node between the balancing bridge and a second input terminal of the operation amplifier.

Abstract: A new protocol of a standard game port for interfacing an external HSP modem, and game port devices is disclosed. The invention provides an external HSP modem housed in a compact case which includes a connector for mounting on a PC game port and a connector for coupling to a joystick and a MIDI interface. Inside the case, a bridge module is coupled to a modem module to forward the modem data input in response to a plurality of serial port clocks. The modem data input is then forwarded to an encode/decode module via multiple redefined read-only ports. The encode/decode module is on a sound chip for restoring the modem data input to their original formats. The restored data will be forwarded to a system bus for CPU to access via an HSP modem interface. The signal transmissions for the joystick and the MIDI I/O device are basically the same because the bandwidth of the game port is still enough if the modem, the joystick, and the MIDI I/O device are operated simultaneously.

Abstract: A system for processing Sigma-Delta CODEC. The system includes modulation/demodulation device, Bus, a software-controlled digital signal processor, and Virtual Device Driver (Vxd). Providing high speeds data for operational analysis, transmission and access by the processing ability of CPU and interrelated aided circuits. The present invention provides various digital signal processes that the Virtual Device Driver (Vxd) mates with the processing ability of CPU without replacing by other hardware device (such as the sound card).