摘要:
A communication system includes an echo canceller and double-talk detector. The echo canceller includes an adaptive finite impulse response filter that generates an adaptive filter weight vector. The double talk detector computes a squared norm of the filter weight vector and detects an increase of the squared norm in order to detect double-talk status. Upon detection of double-talk status, operation of the echo canceller is suspended.
摘要:
A method and apparatus for enhancing a speech signal contaminated by additive noise through Kalman filtering. The speech is decomposed into subband speech signals by a multichannel analysis filter bank including bandpass filters and decimation filters. Each subband speech signal is converted into a sequence of voice frames. A plurality of low-order Kalman filters are respectively applied to filter each of the subband speech signals. The autoregression (AR) parameters which are required for each Kalman filter are estimated frame-by-frame by using a correlation subtraction method to estimate the autocorrelation function and solving the corresponding Yule-Walker equations for each of the subband speech signals, respectively. The filtered subband speech signals are then combined or synthesized by a multichannel synthesis filter bank including interpolation filters and bandpass filters, and the outputs of the multichannel synthesis filter bank are summed in an adder to produce the enhanced fullband speech signal.
摘要:
An antitussive composition is provided. A pharmaceutical composition for relieving, preventing and/or treating a cough includes a sufficient amount of the Morus australis Poir extract as an active component. The effective Morus australis Poir extract is prepared by extracting the root-bark of the Morus australis Poir with water, ethanol, acetone, ethyl acetate, or a combination thereof. The crude extract can be further fractioned by ultrafiltration or reverse phase column.
摘要:
A data processing device applying for a storage device includes: a first interface circuit coupled to the storage device; a processing circuit coupled to the first interface circuit for reading a control code from a divided storage area in the storage device, and executing the control code to generate a storage capacity of the storage device; and a second interface circuit coupled to the processing circuit for feeding the storage capacity back to an operating system such that the operating system regards the storage capacity as a usable capacity of the storage device.
摘要:
A liquid crystal display having pixel data self-retaining functionality includes a gate line for delivering a gate signal, a data line for delivering a data signal, a control unit for providing a first control signal and a second control signal, a data switch, a voltage-control inverter, a liquid crystal capacitor, and a pass transistor. The data switch is utilized for inputting the data signal to become a first data signal according to the gate signal. The voltage-control inverter is utilized for inverting the first data signal to generate a second data signal furnished to the liquid crystal capacitor according to the enable operation of the first control signal. The pass transistor is used for passing the second data signal to become the first data signal or for passing the first data signal to become the second data signal according to the second control signal.
摘要:
A data backup apparatus includes a host interface, a first storage medium interface, a second storage medium interface and a controller. The host interface is utilized to be electrically connected with a host, the first storage medium interface is utilized to be electrically connected with a first storage medium, and the second storage medium interface is utilized to be electrically connected with a second storage medium. The controller is coupled to the host interface, the first storage medium interface and the second storage medium interface, and is utilized for copying data from the first storage medium to the second storage medium without passing through the host interface.
摘要:
A liquid fuel oil warming device is provided. The device with safety, efficiency increasing, and fuel saving, the main structure thereof comprises a fuel oil conversion cylinder, a vapor transportation pipe, and a warming burner, in which the fuel oil conversion cylinder contains a fuel oil body therein, and provide a fuel oil filling port used for adding fuel oil, a constant-temperature means, and a fanning means used for feeding air into the fuel oil conversion cylinder beneficial for generating oil vapor containing fuel oil and then for outputting the oil vapor from the fuel oil conversion cylinder. One end of the vapor transportation pipe is connected to the fuel oil conversion cylinder for delivering fuel vapor. A warming burner is connected to the other end of the vapor transportation pipe, and used for igniting oil vapor to warm, further cooperating with appropriate fuel oil and the low-pressure fanning means in order to obtain the effect of fuel saving, efficiency increasing, and safety.
摘要:
A liquid display panel driving method to drive a plurality of pixels of a liquid display panel in a frame period comprising a plurality of data input intervals is provided. Each pixel comprises first and second capacitors coupled to a first and second common electrode respectively. The liquid display panel driving method comprises the steps of: keeping the second common electrode at the same voltage level; modifying the voltage of the first common electrode of each pixel along a row of scan line to perform a first pre-charge before the data input interval; turning on the pixels to make each pixel receive the data voltage from the data lines during the data input interval; and turning off the pixels and modifying the voltage of the first common electrode to further set the voltage of each of the pixels to a target level after the data input interval.
摘要:
A controlling circuit applicable in a physical storage device includes: a dividing circuit coupled to the physical storage device for dividing a storage capacity of the physical storage device into a plurality of divided storage areas, wherein a divided storage capacity of each divided storage area is not larger than the capacity corresponding to the largest address generated by an operating system; and a feedback circuit coupled to the dividing circuit for feeding back the plurality of divided storage areas to the operating system such that the operating system regards the plurality of divided storage areas as a plurality of independent physical storage devices.
摘要:
A method for configuring a network-attached storage (NAS) includes: coupling the network-attached storage to a user-end personal computer (PC) via an external bus which supports a plug & play function; and utilizing the user-end PC to configure a network interface of the NAS via the external bus. A network-attached storage (NAS) includes a network interface, a bus interface, and processor. The network interface is for connecting with a network. The bus interface is for connecting with an external bus which supports a plug & play function and for receiving network interface setting parameters outputted by a user-end PC via the external bus. The processor is coupled between the network interface and the bus interface, and implemented for configuring the network interface according to the network interface setting parameters received by the bus interface.