Patent application number | Description | Published |
20090059066 | Image processing apparatus and image processing method - A double rate processing part generates, at a double rate, a non-interlaced image signal every frame to twice generate a double-rate non-interlaced signal which has identical information duplicately. An interlace part, after a predetermined process is carried out on the double-rate non-interlaced signal twice generated by the double rate processing part, extracts an odd scan lines from one of the twice generated double-rate non-interlaced signal to generate an odd scan line image signal, extracts an even scan lines from the other of the twice generated double-rate non-interlaced signal to generate an even scan line image signal, so as to obtain an interlaced image signal for one frame. | 03-05-2009 |
20090297160 | Optical transceiver - An optical transceiver stores an output A/D value which is A/D-converted from reference voltage in an EEPROM as correction data in preparing the optical transceiver. The optical transceiver, receiving a request for outputting a monitored value from an external device connected therewith, calculates a variation based on difference between the output A/D value which is A/D-converted from the reference voltage at the timing when the request for outputting the monitored value is received and the correction data stored in the EEPROM. Then, the optical transceiver uses the calculated variation to convert current of light-input power which is input thereinto into voltage, amplify the voltage, and A/D-convert the voltage to thereby correct the output A/D value. The optical transceiver outputs the corrected A/D value to the connected external device as the monitored value. | 12-03-2009 |
20100226658 | OPTICAL RECEIVING APPARATUS, METHOD FOR OPTICAL RECEPTION, AND OPTICAL TRANSMISSION SYSTEM - An optical receiving apparatus, including an optical interferometer including first and second optical waveguides having light paths different in length and converting a phase modulated signal received by the optical receiving apparatus into an intensity modulated signal, monitors the results of the detecting by the temperature detector and the measuring by the electric current measure while sweeping the temperature of the first optical waveguide in a predetermined range; selects the temperature of the first optical waveguide at which temperature the average photocurrent has an extreme value based on the result of the monitoring; and varies the temperature of the first optical waveguide to the selected temperature. | 09-09-2010 |
20110170863 | PHASE MODULATED SIGNAL RECEIVER - A phase modulated signal receiver includes an operation part and a control part. An input power of a received light signal is measured based on current monitored by a monitor circuit. The operation part is configured to correct, on the basis of a ratio of the input power measured when a delay of a phase reference light output from a delay interferometer is a first delay and the input power when the delay of the phase reference light is a second delay, a value of the current monitored by the monitor circuit when the delay is the first delay to a corrected value that depends on the input power of the received light signal obtained when the delay is the first delay. The control part is configured to control the delay of the phase reference light of the delay interferometer by comparing the current monitored when the delay is the first delay and the corrected value of the current monitored when the delay is the second delay and maximizing or minimizing the current monitored by the monitor circuit. | 07-14-2011 |