| 摘要 |
A video processing device is provided to enable a compensation unit to perform the compensation of a video signal by using first compensation data stored in correspondence to illumination detected by an illumination sensor, thereby improving user's convenience in a use of the video processing device. A communication antenna(1) receives a radio wave transmitted through the air, converts the radio wave to a high frequency electric signal, and inputs the high frequency electric signal to a radio circuit(2). Furthermore, the antenna converts a high frequency electric signal output from the radio circuit to a radio wave, and emits the radio wave. On the basis of an order issued by a CPU(Central Processing Unit)(7), the radio circuit demodulates the high frequency electric signal received by the communication antenna, and inputs a resultant signal to a coding-decoding processing circuit(3). Under the control of the CPU, the coding-decoding processing circuit conducts decoding processing on the output signal of the radio circuit, outputs talking voice signal to a receiver, and outputs character and image data to the CPU. The CPU conducts general processing of the portable telephone. Besides the program, fixed patterns recorded in the portable telephone previously, a call incoming tone such as a melody, personal information such as a telephone directory or an address book, and downloaded call incoming melody and image data are stored in a memory(9). Upon call incoming, the CPU reads out a caller's name, a call incoming melody, and a call incoming image, outputs voice data from a speaker(11) via a DAC(Digital Analog Converter)(10), and displays image data on a display device(16) via a video I/F(Interface)(14) and a picture quality enhancement circuit(15) to notify a user of call incoming. And it becomes possible for the user to conduct talking and conduct mail transmission and reception by operating keys(6). A TV antenna(12) converts a received TV broadcast radio wave to a high frequency electric signal and outputs the high frequency electric signal to a TV tuner(13). The TV tuner conducts demodulation processing on the input signal, thereby converts the input signal to an electric signal of CMOS level, and outputs the electric signal to the CPU. The CPU initializes the TV tuner and orders station selection. In response to a request from the CPU, the tuner periodically transmits information indicating the reception state such as a bit rate error to the CPU. The picture quality enhancement circuit conducts picture quality enhancement processing on the video signal output from the CPU, and outputs a resultant video signal to the display device. A backlight(17) generates illumination light for the display device based on power supplied from a backlight drive circuit(18), and illuminates the display device. |
