Sony Corporation

Taiyo Yuden Co., Ltd.

Osamu Hamada

Koji Nishimura

Hiroshi Kakuda

Takashi Sasai

Kazuya Odagiri

Naohisa Kitazato

Hideo Nakamura

Mitsuo Ohsawa

Toshitada Doi

Hidekazu Watanabe

Katsuei Ishida

Akira Iga

Yuichiro Hamada

Yoshihiro Matsuzaki

Jyoji Hukuda

In a calibration process, a capacitor unit is removed from end terminals, or namely, respective capacitors are not connected to terminals. A prescribed voltage (a known voltage) is applied between these end terminals. Among bypass switches of a bypass circuit, the bypass switches connected to one terminal or two or more consecutive terminal pairs from the positive end terminal side are ON. Terminal voltages other than the negative end terminal are obtained and stored as calibration information.

Capacitor power supply, voltage monitoring device, method of monitoring voltage, and method of manufacturing capacitor power supply

The present invention relates to a radio communication apparatus and a radio communications method, a radio communication system, a recording medium, and a computer program in which a response signal to an inquiry is returned to a master only when instructions to perform radio communications are issued. A CPUblinks LEDwhen an inquiry signal is received, and transmits a response to the inquiry signal when a user who has referred to lighting of the LEDoperates a connection response button. The connection response buttonis operated when the user issues radio communications instructions with respect to the inquiry signal. In other words, even when wireless headphonesare within an area capable of radio communications with the master, only if the connection response buttonis operated by the user, it sends to the master a response to the inquiry, and establishes connection. The present invention may be applied to a wireless storage server, wireless headphones, and audio reproduction apparatuses.

Radio communication apparatus and radio communication method, radio communication system, recording medium, and computer program

The present invention relates to a radio communication apparatus and a radio communications method, a radio communication system, a recording medium, and a computer program in which a response signal to an inquiry is returned to a master only when instructions to perform radio communications are issued. A CPUblinks LEDwhen an inquiry signal is received, and transmits a response to the inquiry signal when a user who has referred to lighting of the LEDoperates a connection response buttonThe connection response buttonis operated when the user issues radio communications instructions with respect to the inquiry signal. In other words, even when wireless headphonesare within an area capable of radio communications with the master, only if the connection response buttonis operated by the user, it sends to the master a response to the inquiry, and establishes connection. The present invention may be applied to a wireless storage server, wireless headphones, and audio reproduction apparatuses.

Disclosed herein is a radio transmission device comprising data inputting means for inputting transmission data, data storing means for storing the inputted transmission data temporarily, data compression means for reading data from the data storing means to compress the data, and data transmitting means for transmitting the compressed data through a radio line. With this configuration, a real-time signal in a radio transmission system, in which effective throughput is not guaranteed like ACL link of Bluetooth can be transmitted and received. Delay of data transmission caused by a change in throughput of the line is absorbed by the data storing means. In addition, controlling a compression rate in response to the change in throughput enables transmission with an optimum data rate.

Radio transmission device and method, radio receiving device and method, radio transmitting/receiving system, and storage medium

A signal receiver such as a portable telephone set or pager becomes more convenient when receiving an incoming call. A radio signal receiver for receiving a signal transmitted via a radio communication network line includes calling sound generator operable when an incoming call is received. An informing processing done by the calling sound generator can be varied by the user by selecting keys on a keyboard.

Telephone apparatus

A digital graphic equalizer includes a pulse-sequence generator for generating a sequence of pulse signals, a first digital signal processor for filtering the pulse signals to produce a filtered signal, a digital-to-analog converter responsive to the filtered signal for producing a calibrating signal, and a loudspeaker responsive to the calibrating signal for propagating a calibrating sound in a listening environment, the frequency characteristics of the calibrating sound being subject to modification by the listening environment. A detector detects the calibrating sound as propagated in the listening environment and produces a detection signal representative thereof. An analog-to-digital converter is responsive to the detection signal for producing a digital signal corresponding thereto, and a second digital signal processor is responsive to the digital signal for producing a plurality of frequency-divided signals. A spectrum analyzer is responsive to the frequency-divided signals for analyzing the frequency characteristics of the calibrating sound as propagated in the listening environment and producing a compensating signal adapted to compensate for the modification by the listening environment of the frequency characteristics of the calibrating sound.

Digital graphic equalizer

Described is a digital signal processor including at least two memories, that is, a microprogram memory for storing a series of microinstructions for instructing a digital signal processing procedure, and a coefficient memory for storing coefficient data required for performing a series of arithmetic operations on the digital signal data. These data being transferred and written into said microprogram memory and said coefficient memory from a host computer system. The coefficient memory has at least two pages corresponding to the total memory area which may be addressed during digital signal processing to be effected by said microinstructions. Page selection of the coefficient memory may be performed from said host computer system.

Digital signal processing system

A signal processing system records and reproduces a music signal which varies repeatedly. The music signal is sampled at a given sampling period and pulse row obtained from the sampling is rearranged into a given pattern to achieve a new pulse row which is stored. For read out from a storage medium, a read-out means reproduces the original pulse row sequence and provides a wave form of the original music signal.

Signal processing system

A digital waveform generating apparatus includes a key assignor selecting a frequency of a signal to be generated, a number-setting circuit for generating a first data word corresponding to the selected frequency, a first memory for storing said first data word, a second memory for storing a second data word, an accumulator for accumulating the first data word onto the second data word stored in the second memory, so that the second data word stored in the second memory after accumulating represents the sum of the second data word immediately prior thereto added with said first data word, a waveform memory, preferably an ROM, for storing predetermined waveform data and for generating a waveform data output signal, and a control circuit for controlling such accumulating and progressively addressing the waveform memory in accordance with the stored second data word at the time of a timing signal. Preferably, the number-setting circuit generates a plurality of the first data words corresponding to at least one corresponding frequency, the first and second memories have a plurality of channels storing the first data word and the second data words to be added with the first data words, and the control circuit operates in a time-sharing fashion. To avoid folded errors in the output signal, the waveform memory can include a plurality of data banks each storing waveform data corresponding to a predetermined portion of the frequency range of the apparatus, and the control circuit operates to select an appropriate data bank corresponding to the selected frequency.

Digital waveform generating apparatus

A fluid flow control system has a fluid source and plural flow pipes connected to the fluid source. Each of the pipes has an opening of a specific area corresponding to one of the bit orders of a PCM (Pulse Code Modulated) input signal. The flow-condition of the fluid through each of the pipes is controlled by the PCM signal without changing the PCM signal to an analog signal. The summation of the outflow from each of the pipes combines to produce an analog flow output signal in response to the PCM input signal.

Fluid flow control speaker system

In a tone generating apparatus for an electrical music instrument having an array of switches corresponding to respective keys of a keyboard and which are selectively actuable by manipulation of the respective keys, a timing signal generator, preferably including a shift register, has a repetitive operating cycle and is connected with the switches for providing timing signals in response to actuation of the latter, with each of the timing signals occurring at a time during the operating cycle which corresponds to the position of the respective actuated switch in the switch array, an exponential signal generator provides an exponential signal in synchronism with the operating cycle of the timing signal generator, a sample and hold circuit receives the exponential signal and is operative to sample and hold a value of the exponential signal in dependence on the time of occurrence of a timing signal in the operating cycle, and variable frequency oscillator controlled in accordance with the value of the exponential signal which is sampled and held for providing an output oscillation having a frequency determined by a selectively actuated one of the switches.

Tone generator for electrical music instrument

A pulse width modulation circuit which comprises a mixer for combining an input audio signal with a feedback signal and for developing a difference signal to feed to an integration circuit. The integration circuit is coupled to a pulse width modulator which has a sawtooth carrier input for modulating the input audio signal. The resulting pulse modulated signal is then fed to a pulse amplifier and a low-pass filter and finally to a load. The output of the low-pass filter is coupled back to the mixer.

Growing community of inventors

Kanagawa, Japan

Osamu Hamada