Yamaha Corporation

Tatsutoshi Abe

Junichi Fujimori

Hirotaka Kuribayashi

Yoshinari Nakamura

Shoichi Matsumoto

Shinsuke Saba

Kunihiko Maeda

Takashi Furukawa

Kotaro Terada

Masaya Kano

Takao Yamamoto

Shunichi Kamiya

Yoshihiro Inagaki

Yoshinori Kawase

Yasushi Tamazawa

Yasushi Ohtani

Sound device receives a first sound signal from a first sound processor, generates a second sound signal based on the first sound signal, and transmits the second sound signal to a second sound processor. The second sound processor performs signal processing to the second sound signal to generate a third sound signal. The sound device receives the third sound signal from the second sound processor, checks a state of the second sound processor based on a signal received from the second sound processor, transmits a fourth sound signal based on the third sound signal to the first sound processor when determining that the state of the second sound processor is normal, and generates a fifth sound signal based on the first sound signal or the second sound signal to transmit it to the first sound processor when determining that the state of the second sound processor is abnormal.

Sound processing method, and sound processing system

An audio interface apparatus includes a communication apparatus configured to receive first time-series sound data from a computing device, an input circuit including an input port configured to be coupled with a sound input apparatus, an output circuit including an output port configured to be coupled with a sound output apparatus, a memory, and a processor. The processor is configured to: store, in the memory, the first time-series sound data, to output, to the output circuit, the first time-series sound data stored in the memory, to acquire a second time-series sound data from the input circuit, to store, in the memory, the second time-series sound data, to generate an identifier for synchronizing the second time-series sound data with the first time-series sound data, and to transmit, to the computing device, the second time-series sound data and the identifier.

Audio interface apparatus and recording system

A data transmission apparatus connecting to a network consisted of a plurality of data transmission apparatuses comprises a disconnecting device that disconnects a connection established between a transmission plug of a transmitting node and a reception plug of a receiving node, both nodes being connected to the network, an optimization requesting device that requests optimization of transmitting sequences to the transmitting node, a receiver that receives information about a transmission plug newly assigned to the transmitting sequence used by the transmitting nodes of which connection has been disconnected by the disconnecting device, the information being received as an answer for the optimization request from the transmitting node, and a connecting device that establishes a new connection between the newly assigned transmission plug and the reception plug of the receiving node of which connection has been disconnected by the disconnecting device.

Data transmission apparatus efficiently using network resources

A connection setting apparatus having a connection information acquiring unit for acquiring first connection information from a plurality of apparatus connected to a network, each apparatus having at least one line, and a generating unit for generating second connection information in accordance with the acquired first connection information.

Connection setting apparatus

A communication control apparatus is provided for setting a plurality of node apparatuses to either of a transmitter and a receiver of synchronization information to synchronize the node apparatuses with each other. A storage device memorizes capability information representing either of an active capability to transmit the synchronization information and a passive capability to receive the synchronization information, owned by each of the node apparatuses. An indicating device indicates the active capabilities and the passive capabilities owned by the node apparatuses. A specifying device is operated in association with the indicated active capabilities and the passive capabilities for outputting status information effective to specify each node apparatus to a transmitter or a receiver. A plurality of memory blocks are provided in correspondence to the plurality of the node apparatuses to memorize status information. A registering device registers each of the outputted status information into each memory block to set the corresponding node apparatus to a transmitter of the synchronization information when the status information specifies the transmitter, and to set the corresponding node apparatus to a receiver of the synchronization information when the status information specifies the receiver.

Method of determining master and slaves by communication capability of network nodes

In transmitting a plurality of data arranged in a time series of a first period (T), there is formed, every predetermined second period (SF) longer than the first period (T), a packet containing a plural number (x) of data supplied within a given cycle of the second period (SF). At that time, one data is specified from among every group consisting of a fixed number (M), not smaller than two, of the data, and time information indicative of a time position of the specified data is attached to the packet which the data belong to. A receiving-end unit reproduces the data, by reproducing the respective time positions, i.e., the first period (T), of the individual data on the basis of the time information contained in the received packet.

Data communication method and system

A network system is logically established according to path information to circulate a data throughout a complex of electronic equipments which are communicably connected to one another. Each electronic equipment has at least either of a receiver port which receives a data and a transmitter port which transmits a data. The path information is effective to enable a primary electronic equipment having a receiver port to identify a secondary electronic equipment having a corresponding transmitter port. The primary electronic equipment opens a logical path of the data connecting between its own receiver port and the corresponding transmitter port of the secondary electronic equipment according to the provided path information to thereby enable circulation of the data throughout the complex of the electronic equipments.

Network system having automatic reconstructing function of logical paths

In a network system, a plurality of nodes are communicable with one another to exchange information and to transfer data, and a bus is provided for connection to the nodes and for configuration of logical paths to logically link one node to another node so as to secure transfer of the data. Each node has at least one port which is allocated for accessing the bus and which is classified into four types of an isochronous talker, an isochronous listener, a multicast talker and a multicast listener. The nodes are allocated to bind isochronous channel numbers or multicast channel numbers to respective isochronous or multicast talkers and listeners in a manner so as to maximize efficiency of the network.

Local area network transferring data using isochronous and asynchronous

A musical network system has a plurality of musical equipments interconnected to each other through a communication network which circulates a control message for producing a musical sound. One musical equipment has a transmitter for transmitting a control message to the communication network. Another musical equipment has a receiver for receiving the control message from the communication network. An internal tone generator operates according to the received control message for producing a musical sound. A detector detects whether the received control message is a right one which may not disturb operation of the generator means or a wrong one which may disturb operation of the generator means. A transmitter returns an error message to the one musical equipment through the communication network when the detector detects that the received control message is the wrong one. Further, a receiver of the one musical equipment receives from the communication network status information which is returned by another musical equipment, and checks the returned status information to detect if mis-operation has occurred in another musical equipment for initiating recovery of the mis-operation.

Growing community of inventors

Hamamatsu, Japan

Tatsutoshi Abe