Sony Corporation

Panasonic Corporation

Mitsubishi Electric Corporation

Takehiro Sugita

Takashi Usui

Akira Ogino

Shigeru Sugaya

Kunio Fukuda

Yasunori Maeshima

Akira Sakamoto

Junichi Nakata

Hisaki Hiraiwa

Takeshi Fukami

Seiji Kobayashi

Hisao Koga

Tetsuya Naruse

Koji Ikeda

Akio Kurobe

Nozomu Ikeda

Yuji Igata

Toshiyuki Hiroi

Go Kuroda

Tatsuo Shimizu

Hidemasa Yoshida

Shigeru Takasu

Michimasa Komatsubara

Hirotoshi Yamada

Hiromu Okamoto

Kazuji Sasaki

Takanobu Kamo

Junichi Ohshima

Mie Tajima

Yoshinori Mizugai

Tomoya Yamaura

Akira Shimizu

Isao Hidaka

Masakatsu Toyoshima

Toshiya Miyata

Hisato Shima

A signal processing method comprising rearranging transmission data so that a predictable portion of the transmission data is spread more uniformly in the transmission data, the predictable portion including information that is predictable by a receiver side. The phase of a carrier signal can be modulated based on the rearranged transmission data, and the modulated signal may be transmitted. The transmitted signal is received by the receiver side. A header position of each frame of the received signal is detected based on the information predictable to the receiver side. Once detected, the frames of the received signal are integrated, and the transmission data is decoded based on the integration. A signal processing device, a transmitter, and/or a receiver may utilizes these methods to transmit, receive, and/or process signals.

Signal processing device and method and program

There is provided an electronic appliance including a hinge portion including a first rotating hinge including a first electrode for transmitting a direct current and a first coil for transmitting/receiving a data signal by using electromagnetic induction, and a second rotating hinge including a second electrode for receiving the direct current by contacting the first electrode and a second coil for transmitting/receiving the data signal to/from the first coil. The hinge portion connects the first rotating hinge and the second rotating hinge in a rotatable manner while maintaining a state where the first electrode and the second electrode are in contact with each other and a center axis of the first coil and a center axis of the second coil are substantially same.

Electronic appliance

Provided is a signal processing apparatus including an encoder for encoding, according to respective specific coding schemes, a first bit string formed from bit values at odd-numbered positions and a second bit string formed from bit values at even-numbered positions that are obtained by alternately extracting bit values from a bit string that is expressed by mutually different first and second bit values, and generating first and second encoded signals that do not include a DC component, and a signal generation unit for generating a multilevel signal by respectively adding, to a clock signal having larger amplitude than the first and second encoded signals that are generated by the encoder, the first encoded signal in synchronization with a timing of the clock signal being at a positive amplitude value and the second encoded signal in synchronization with a timing of the clock signal being at a negative amplitude value.

Signal processing apparatus, information processing apparatus, multilevel coding method, and data transmission method

There is provided an information processing apparatus, including a signal receiver that receives a signal encoded in such a way that a signal containing a first bit value and a second bit value, wherein the first bit value is represented by first amplitude values, the second value is represented by a second amplitude value, and polarity of the encoded signal amplitude value is reversed in each period, a conversion processor performs conversion to add a delayed signal that is delayed by delaying a signal received by the signal receiver by one period of the received signal, an inversion processor that performs inverse processing of the conversion on the signal output from the conversion processor, and an input data decoder that decodes an input data by determining the first and second values based on the amplitude value of the signal output from the inversion processor.

Information processing apparatus and signal determination method

There is provided an information processing apparatus, including a signal receiving unit that receives a signal encoded in such a way that a signal containing a first bit value and a second bit value that are mutually different, wherein the first bit value is represented by a plurality of first amplitude values, the second bit value is represented by a second amplitude value that is different from the first amplitude values, a same amplitude value is not taken successively, and polarity of the amplitude value is reversed in each period, an amplitude square unit that squares an amplitude of the signal received by the signal receiving unit, and an input data decoding unit that decodes an input data by determining the first and second bit values based on the amplitude value of the signal output from the amplitude square unit.

Information processing apparatus, decoding processing method and signal transmission method

There is provided a signal transmission system including an information processing device and an interface device. The information processing device codes transmitted data into a code that does not include a direct-current component, and the information processing device transmits the code while superimposing the code on a direct-current power. A polarity of the code is inverted every half a period of a clock. The interface device detects a polarity inversion period of a signal received from the information processing device, and the interface device reproduces the clock based on the detection result.

Signal transmission system, interface device, and signal transmission method for superimposing a data signal on an electric power line

A wireless communication system has transmission apparatus transmitting a wireless signal based on a transmission unit and reception apparatus. The reception apparatus includes plural reception devices receiving the wireless signal to obtain the informational signals and output-controlling device selecting any informational signal from the informational signals. The reception device has communication-quality-detecting device that detects communication quality of the wireless signal, a memory storing the informational signal, and synchronization-detection-storage-controlling device that detects the synchronization signal and controls the memory to store the informational signal based on a detected result of the synchronization signal. The output-controlling device reads the informational signals out of the memories with the signals being synchronized after the reception devices have detected the synchronization signals, selects the reception device having satisfactory communication quality based on a detected result of the communication quality, and outputs the informational signal read out of the selected reception device.

Space-diversity wireless image communication system

Provided is an information processing apparatus which includes a first-module including a first narrow-band communicator for performing narrow band communication with a second-module, a first broadband-communicator for performing broadband communication with the second-module, and a first controller for controlling an operation state of the first broadband-communicator according to an operation mode, and a second-module including a second narrow-band communicator for performing narrow-band communication with the first-module, a second broadband-communicator for performing broadband communication with the first-module, and a second controller for controlling an operation state of the second broadband-communicator according to an operation mode. The first controller places the first broadband-communicator in an operation state in a first mode, and places the first broadband-communicator in a standby state in a second mode. The second controller places the second broadband-communicator in an operation state in the first mode, and places the second broadband-communicator in a standby state in the second mode.

Information processing apparatus and mode switching method

Disclosed herein is a communication system including: at least one power line communication apparatus connected via a general power line for supplying a commercial alternate current power; a communication terminal having a modem for power line communication, and a plurality of first coils having different directivities; and a coupling apparatus, connected to a power line, having a filter for attenuating an alternate current component of the power line, and a second coil arranged after the filter; wherein the communication terminal executes mutual communication with any of the power line communication apparatus connected via the general power line through proximity communication based on an electromagnetic coupling action that is generated between the plurality of first coils and the second coil when the communication terminal is brought to the proximity of a coupling surface of the coupling apparatus.

Communication system and communication apparatus

An information processing device is provided that includes a signal receiving portion, an absolute value conversion portion, and an input data decoding portion. The signal receiving portion receives a signal that is encoded such that mutually distinct first and second bit values are respectively expressed by pluralities of mutually distinct first amplitude values and second amplitude values, the first and second bit values also being encoded such that the same amplitude value does not occur twice in succession and such that the polarities of the amplitude values are inverted with each cycle. The absolute value conversion portion converts into absolute values the amplitude values of the signal that has been received by the signal receiving portion. The input data decoding portion decodes the first and second bit values based on the amplitude values in the signal that have been converted into absolute values by the absolute value conversion portion.

Information processing device and signal processing method

An information processing device includes: a signal receiving portion that receives a signal in which input data that contains first and second bit values different from one another is encoded such that the first bit value is expressed by first amplitude values and the second bit value is expressed by second amplitude values different from the first amplitude values, and such that the same amplitude value does not occur twice in succession and the polarities of the amplitude values are inverted with each cycle; a clock signal extraction portion that extracts a clock signal by detecting polarity inversions in the received signal; a clock signal subtraction portion that subtracts the extracted clock signal from the received signal; and an input data decoding portion that decodes the input data by determining the first and second bit values based on an amplitude value of the signal obtained by subtracting the clock signal.

Information processing device, signal processing method, and signal transmission method

A communications device, which performs data communication, includes an AC cycle sensorwhich is connected to a power linesupplied with an a.c. voltage and generates a synchronous signal SS at timing of an a.c. voltage waveform AC of the power line; a data communicatorfor performing data communication; and a communications controllerwhich performs communication of a control signal including information showing at least one of a communications device and a communications standard and controls the data communicator. When the a.c. voltage supplied to the power lineis an N-phase and when the cycle of the a.c. voltage waveform is T, data communication to be performed in a communication period subsequent to the period is controlled on the basis of the control signal included in the period of T/2M on condition that M is a natural multiple of N.

Communications device and communications method

Provided is an information processing apparatus including a distributor that distributes input data in units of M bits and generates N M-bit bit sequences, an encoder that converts each of the N bit sequences distributed by the distributor into a binary symbol sequence of K symbols and generates N binary symbol sequences, a signal generator that generates N transmission signals Sj synchronized with a specific symbol clock and having, as an amplitude value, each symbol value included in the N binary symbol sequences, a signal delay unit that delays, with regard to j, the transmission signals Sj generated by the signal generator by a (j&#x2212;1)/N-symbol period and generates delay signals Rj, a signal addition unit that adds the delay signals Rj generated by the signal delay unit and generates an added signal, and a signal transmitter that transmits the added signal generated by the signal addition unit.

Information processing apparatus, and signal processing method

A signal processing apparatus is provided, which generates a data signal having a signal waveform corresponding to a first bit value of a signal waveform transitioning from a high level to a low level or a signal waveform transitioning from a low level to a high level, a pre-transition signal level corresponding to a second bit value of one of a plurality of high levels and a plurality of low levels, and a post-transition signal level corresponding to a third bit value of the other.

Growing community of inventors

Kanagawa, Japan

Takehiro Sugita