Abstract: A sub-access point (AP), system, and method for adjusting a power level of a transmission signal, and more particularly, in which the power level of a transmission signal output from the sub-AP is adjusted based on received signal strength indicator (RSSI) readings and frame error rate (FER) of a main AP, thereby eliminating shadow areas and minimizing interference between the main AP and the sub-AP. The sub-AP includes a reception unit which receives a beacon frame and a data frame from a main AP, a RSSI checking unit which checks an RSSI of the main AP, a FER checking unit which checks an FER, and a control unit which determines a power level at which a transmission signal is to be transmitted based on the identified RSSI and the identified FER and causes a transmission signal to be output at the determined power level.

Abstract: A sub-access point (AP), system, and method for adjusting a power level of a transmission signal, and more particularly, in which the power level of a transmission signal output from the sub-AP is adjusted based on received signal strength indicator (RSSI) readings and frame error rate (FER) of a main AP, thereby eliminating shadow areas and minimizing interference between the main AP and the sub-AP. The sub-AP includes a reception unit which receives a beacon frame and a data frame from a main AP, a RSSI checking unit which checks an RSSI of the main AP, a FER checking unit which checks an FER, and a control unit which determines a power level at which a transmission signal is to be transmitted based on the identified RSSI and the identified FER and causes a transmission signal to be output at the determined power level.

Abstract: An apparatus and method for processing a video signal, and particularly, an apparatus and method for deleting a sawtooth wave are provided in which a sawtooth wave component is detected and with consideration of direction the sawtooth wave is deleted. The sawtooth wave deleting method includes (a) detecting a sawtooth wave component based on an area dispersion value and motion information in each frame in an input video signal; (b) detecting a direction from the pixels of the detected sawtooth wave component; and (c) deleting the sawtooth wave component by outputting an interpolated pixel in the detected direction. According to the apparatus and method, since interpolation of a sawtooth wave component is performed with consideration of the direction so that the sawtooth wave component is effectively deleted, a much smoother image is provided after deinterlacing.

Abstract: An apparatus and method for processing a video signal, and particularly, an apparatus and method for deleting a sawtooth wave are provided in which a sawtooth wave component is detected and with consideration of direction the sawtooth wave is deleted. The sawtooth wave deleting method includes (a) detecting a sawtooth wave component based on an area dispersion value and motion information in each frame in an input video signal; (b) detecting a direction from the pixels of the detected sawtooth wave component; and (c) deleting the sawtooth wave component by outputting an interpolated pixel in the detected direction. According to the apparatus and method, since interpolation of a sawtooth wave component is performed with consideration of the direction so that the sawtooth wave component is effectively deleted, a much smoother image is provided after deinterlacing.