Abstract: A communication receiver includes a first signal processing circuit and a second signal processing circuit. The first signal processing circuit includes a first feedforward equalizer and a decision circuit. The first feedforward equalizer processes a received signal to generate a first equalized signal. The decision circuit performs hard decision upon the first equalized signal to generate a first symbol decision signal. The second signal processing circuit includes a second feedforward equalizer, a decision feedforward equalizer, and a first decision feedback equalizer. The second feedforward equalizer processes the first equalized signal to generate a second equalized signal. The decision feedforward equalizer processes the first symbol decision signal to generate a third equalized signal. The first decision feedback equalizer generates a second symbol decision signal according to the second equalized signal and the third equalized signal.

Abstract: A virtual reality wearable device and an obstacle detecting method thereof are disclosed. The virtual reality wearable device includes an environment capture module, an image integration module, a detection module and a warning module. The environment capture module is used for capturing an external image. The image integration module is used for receiving the external image in real time as a real-time environment image, and integrating the external images captured around one circle into an initial environment image. The detection module is used for detecting whether there is a difference between the initial environment image and the real-time environment image. When there is a difference between the initial environment image and the real-time environment image, the detection module generates a notification signal. The warning module is used for sending a warning signal according to the notification signal.

Abstract: An advertisement image generation system and an advertisement image generating method thereof are disclosed. The advertisement image generation system stored an original advertisement image includes an image display device, an image capturing device, an image selection module and a synthesis module. The image capturing device is used to capture a capturing image of a scene, wherein the capturing image has an object. The image selection module is used to find a corresponding selected area image which is having the object from the capturing image. The synthesis module is used for combining the selected area image and the original advertisement image into a final advertisement image, thus the image display device is able to display the final advertisement image.

Abstract: A video image generation system and a video image generating method thereof are disclosed. The video image generation system includes an image capturing module, an image selection module and a background synthesis module. The image capturing module is used to capture an original image of a scene, wherein the original image has an object. The select the image module is used to find a corresponding selected area image which is having the object from the original image. The background synthesis module is used for combining the selected area image and a background image into a final image.

Abstract: A system includes a plurality of modules which are configured for determining a suitable impedance for a modem. The plurality of modules send signals with a plurality of signal frequencies to a telephone and receive feedback signals from the telephone under each of a plurality of impedances of the modem, compute a total decibel value of the feedbacks under each impedance, and determine a suitable impedance according to a minimum total decibel value from the plurality of total decibel values.

Abstract: A modem (10) includes a signal tuner module (101), a signal processing module (103), and a mode switching module (105). The signal tuner module receives a radio frequency (RF) signal in a first operation mode, and converts the RF signal to an intermediate frequency (IF) signal according to the first operation mode. The signal processing module processes the IF signal to generate an error rate according to the first operation mode. The mode switching module determines whether the first operation mode is right according to the error rate, and switches from the first operation mode to a second operation mode when the first operation mode is not right. A method for switching operation modes thereof is also provided.

Abstract: A system includes a plurality of modules which are configured for determining a suitable impedance for a modem. The plurality of modules send signals with a plurality of signal frequencies to a telephone and receive feedback signals from the telephone under each of a plurality of impedances of the modem, compute a total decibel value of the feedbacks under each impedance, and determine a suitable impedance according to a minimum total decibel value from the plurality of total decibel values.

Abstract: A method of scanning channels for a digital broadcasting receiver includes: presetting a starting frequency, a time interval, a first threshold, and a second threshold; scanning a channel from the starting frequency; reading a first gain value of an IF signal from a buffer when the receiver begins to scan the channel; reading a second gain value of the IF signal from the buffer after the time interval has elapsed; determining whether a difference between the first value and the second value is less than or equal to the first threshold; determining whether the second value is less than or equal to the second threshold, if the difference between the first value and the second value is less than or equal to the first threshold; and the receiver moving on from the channel being currently scanned to scan a next channel, if the second value is greater than the second threshold.

Abstract: The retractable cable device includes a base, a rotary portion, a spring, a cover, and at least two medal plates. The rotary portion cooperates with the base to form a cavity, and the cable is disposed on the rotary portion. The spring is disposed in the cavity for driving the rotary portion to rotate. The cover is coupled to the base. The metal plate is connected to the rotary portion for maintaining an electrical connection between the antenna and the cable when the rotary portion rotates.

Abstract: A modem (10) includes a signal tuner module (101), a signal processing module (103), and a mode switching module (105). The signal tuner module receives a radio frequency (RF) signal in a first operation mode, and converts the RF signal to an intermediate frequency (IF) signal according to the first operation mode. The signal processing module processes the IF signal to generate an error rate according to the first operation mode. The mode switching module determines whether the first operation mode is right according to the error rate, and switches from the first operation mode to a second operation mode when the first operation mode is not right. A method for switching operation modes thereof is also provided.

Abstract: The retractable cable device includes a base, a rotary portion, a spring, a cover, and at least two medal plates. The rotary portion cooperates with the base to form a cavity, and the cable is disposed on the rotary portion. The spring is disposed in the cavity for driving the rotary portion to rotate. The cover is coupled to the base. The metal plate is connected to the rotary portion for maintaining an electrical connection between the antenna and the cable when the rotary portion rotates.

Abstract: A method of scanning channels for a digital broadcasting receiver includes: presetting a starting frequency, a time interval, a first threshold, and a second threshold; scanning a channel from the starting frequency; reading a first gain value of an IF signal from a buffer when the receiver begins to scan the channel; reading a second gain value of the IF signal from the buffer after the time interval has elapsed; determining whether a difference between the first value and the second value is less than or equal to the first threshold; determining whether the second value is less than or equal to the second threshold, if the difference between the first value and the second value is less than or equal to the first threshold; and the receiver moving on from the channel being currently scanned to scan a next channel, if the second value is greater than the second threshold.