Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Tadayoshi Okuda

Masami Yamamoto

Yosuke Shiota

Kojiro Kawasaki

Toshiya Noritake

Shohei Kawagoe

Yukinobu Tokoro

A playback device (measurement device) in a record playback system including a record player and the playback device measures a frequency characteristic of each of a plurality of input signals which are input from the record player to the playback device when a plurality of test signals for measuring a characteristic of the record playback system are played back by the record player, the plurality of test signals being recorded on a phonograph record, the plurality of input signals corresponding to the plurality of test signals recorded; calculates a measurement error between the frequency characteristic of each of the plurality of input signals measured and a predetermined frequency characteristic; selects a frequency characteristic of which the measurement error is smallest from among the frequency characteristics of the plurality of input signals, as a measurement result of the record playback system; and outputs the measurement result selected.

Measurement device, measurement method, recording medium, and phonograph record

The signal processing device includes: an offset adjuster; an amplitude adjuster; and a delay adjuster, wherein the offset adjuster adjusts the DC offset using a first parameter regarding the DC offset determined based on an output of the offset adjuster which is output when no signal is input to the signal processing circuit by the subtractor, the amplitude adjuster adjusts the amplitude using a second parameter regarding the amplitude determined based on (i) an output of the amplitude adjuster which is output when a first test signal is input to the signal processing circuit and (ii) the first test signal, and the delay adjuster adjusts the delay using a third parameter regarding the delay determined based on the difference signal that is an output of the subtractor when a second test signal is input to the signal processing circuit.

Signal processing device and adjusting method

Electrodes and regions of top plate opposed to electrodes constitute switches that have capacitances varying when the regions of top plate are depressed from top plate toward electrodes. Depression detection circuit calculates the capacitance change amounts of switches indicating changes of the capacitances from a reference value. Depression detection circuit calculates the maximum value and sum of the capacitance change amounts of switches. When the capacitance change amount of at least one switch exceeds threshold and a situation in which the ratio of the maximum value to the sum is equal to or greater than threshold has lasted for the number of repetitions in, depression detection circuit determines that the switch having the maximum value of the capacitance change amount is in a depressed state.

Capacitive multi-switch device with common metal plate and electronic machine

A control device includes a first communication circuit, a microphone, and a first control circuit. The first control circuit: acquires background noise in the room through the microphone and calculates a signal level of the background noise; transmits, to a playback device, a first control signal directing playback of a first test signal through a loudspeaker; acquires the first test signal through the microphone and calculates a signal level of the acquired first test signal; estimates a signal level of a second test signal using the signal level of the first test signal as a reference; increases a set value of a sound volume of the second test signal when a signal level obtained by subtracting a predetermined value from the estimated signal level of the second test signal is less than or equal to the signal level of the background noise; transmits, to the playback device, a second control signal directing playback of the second test signal through the loudspeaker; acquires the second test signal through the microphone, calculates a frequency response of the room, and calculates a correction coefficient based on the calculated frequency response; and transmits a third control signal including the calculated correction coefficient to the playback device.

Playback system, control device, control method, and program

An audio signal amplification device includes: a clock generation circuit that generates a clock for use in amplifying an audio signal; and a power supply circuit that generates direct current power, which is supplied to the clock generation circuit, from input power. The power supply circuit includes: a constant voltage generation circuit that generates direct current power of a constant voltage from the input power; a first capacitor; a first charging circuit that charges the first capacitor by using the input power; and a selection circuit. The selection circuit selects one direct current power of the direct current power generated in the constant voltage generation circuit and of direct current power charged to the first capacitor, and supplies the selected direct current power to the clock generation circuit.

Audio signal amplification device, power supply device, and power supply control method

A video scan converter processes a video stream including a first coding unit, which has been obtained by encoding a pair of fields Nand Nthat has come from a first frame of film video, and a second coding unit, which has been obtained by encoding a pair of a field Nthat has also come from the first frame and a field Mthat has come from a second frame, not the first frame. The video scan converter includes: a decoder, which receives the video stream, decodes the first and second coding units, and sequentially outputs the data of the respective fields N, N, Nand M; and a scan converter, which generates a frame based on associated two of those fields that have been supplied from the decoder. In outputting a frame associated with the field N, the scan converter generates the frame based on the fields Nand Nwithout using the data of the field N

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Osaka, Japan

Tadayoshi Okuda