Sony Corporation

Kenji Shiba

Tetsuya Aoki

Hiroshi Nagasawa

Masataka Wakamatsu

Satoru Suzuki

Tomomasa Kojo

Teppei Sato

Kengo Sawada

A receiving device includes a receiving unit receiving a transmission signal of audio data sampled by a first clock from a transmitting device, a received data processing unit selectively executing an asynchronous mode process for executing demodulation of the audio data with respect to the transmission signal received in the receiving unit with a second clock which is asynchronous with the first clock and has the same frequency as the first clock and outputting the demodulated audio data and a re-sampling mode process for performing re-sampling with respect to the audio data obtained from the transmission signal received in the receiving unit and outputting the audio data re-sampled with the second clock, and a control unit controlling the received data processing unit to execute any one of the asynchronous mode process and the re-sampling mode process.

Receiving device, transmitting device, receiving method, transmitting method, and communication system

A transmission device includes a transmission power setting unit that respectively sets a transmission power for transmitting a main sound signal indicating a main sound and transmission powers for transmitting one or two or more subsidiary sound signals which pertain to the main sound signal and which realize a predetermined sound effect, and a first communication unit that respectively transmits the main sound signal and the one or two or more subsidiary sound signals on time division channels using the same frequency band, based on the transmission powers set by the transmission power setting unit, wherein the transmission power setting unit sets the transmission power for the main sound signal to a first reference value, and sets the transmission powers for the subsidiary sound signals to a second reference value smaller than the first reference value.

Transmission device and transmission method

An audio data receiving apparatus includes a receiving unit configured to receive audio data sampled in accordance with a first clock signal; a synchronization unit configured to generate a second clock signal that is synchronized with the first clock signal by extracting clock components contained in the audio data; a demodulator configured to demodulate the audio data in accordance with the second clock signal; an oversampling unit configured to oversample the audio data demodulated by the demodulator by using a frequency higher than a frequency of the second clock signal; a clock generator configured to generate a third clock signal having a frequency nearly equal to the first clock signal; and a data output unit configured to output the audio data oversampled by the oversampling unit in accordance with the third clock signal generated by the clock generator.

Audio data receiving apparatus, audio data receiving method, and audio data transmission and receiving system

According to the invention, there is provided an audio signal receiving apparatus which receives audio signals transmitted from external connection apparatuses through a plurality of channels, including an audio signal transmitting scheme determining unit which determines a transmitting scheme of the audio signal in the external connection apparatus on the basis of channel mapping information representing types of the audio signals transmitted by the external connection apparatuses. When the audio signal to be received is changed, a process to be executed is changed depending on the transmitting scheme of the audio signal.

Audio signal transmitting apparatus, audio signal receiving apparatus, audio signal transmission system, audio signal transmission method, and program

There is provided an information processing apparatus according to the present invention performing a bidirectional communication with another information processing apparatus through a plurality of channels in a predetermined frequency band, and including a selecting portion for selecting an identifier from a plurality of identifiers to use for connection with the another information processing apparatus; a radio wave state monitoring portion for monitoring a radio wave state of the plurality of channels; and a channel controlling portion for setting the channel having satisfactory radio wave state as the channel to use in the bidirectional communication based on a monitoring result of the radio wave state.

Information processing apparatus, information processing method, and recording medium

There is provided an audio signal transmitting apparatus including: a channel mapping unit which determines the audio signals allocated to each of the channels and generates channel mapping information representing types of the audio signals allocated to each of the channels; an audio signal transmitting unit which transmits the audio signals allocated to each of the channels by the channel mapping unit to the external connection apparatuses by a first transmitting scheme or a second transmitting scheme; and a connection management information providing unit which provides connection management information including the channel mapping information and transmitting scheme information representing the transmitting scheme of the audio signals to the external connection apparatuses.

A signal reproduction device and signal reproduction method capable of automatically discriminating the format of input data and reproducing the data is provided. The signal reproduction device comprises an IEEE 1394 link chip, which receives transmission signals obtained by converting data in a plurality of prescribed signal formats into a prescribed packet format and transmitting, and reproduces signals in a prescribed signal format from the received transmission signals in packet form, as well as an IEEE 1394 microcontroller, which extracts a prescribed packet of received transmission signals, detects data in the extracted packet indicating modification from the signal format currently being received to another prescribed signal format, and based on the detected signal format modification data, outputs parameters necessary for reproduction of signals in another prescribed signal format from received signals in packet form; and the signal reproduction device automatically discriminates the data format of input data and reproduces the data.

Signal reproducing apparatus and signal reproducing method

A digital signal processor receives 1-bit audio signals acquired by sigma modulation and sent over a predetermined transmission line and makes a changeover between the audio signal and a mute pattern includes an IEEE 1394 interface. The IEEE 1394 interface receives an isochronous packet sent over an IEEE 1394-formatted transmission line, extracts music data from the packet, supplies the music data to a DRAM, monitors the amount of data stored in the DRAM, reads a 1-bit digital signal or generates a mute pattern such as a 9-6 pattern, and makes a changeover between the 1-bit digital signal read from the DRAM and mute pattern while fading them. The digital signal processor further includes a D-A converter to convert the 1-bit digital signal supplied from the IEEE 1394 interface into an analog signal.

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Tokyo, Japan

Kenji Shiba