US 2010/0305734 A1Published application

Audio signal processor and network system

AssigneeYamaha Corporation

InventorKei NAKAYAMA

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Abstract

In the case where an audio network system that performs transport of audio signals between a plurality of processors is constructed such that the plurality of processors each including two sets of transmission I/Fs and reception I/Fs are connected in series, and a TL frame generated by a master node is circulated along a ring transmission route formed among the processors in each fixed period, the TL frame including a plurality of storage regions for audio signals, when one of the processors is required to be the master node, the one processor resets in sequence processors which are connected on both sides thereof and processors behind the processors connected on both sides to once remove each of those processors from a ring transmission route if it belong to any ring transmission route, then incorporates the processors into a ring transmission route in which the one processor belongs to.

Claims10

Dependent claims

An audio signal processor comprising two sets of receivers and transmitters each performing communication in a single direction, and capable of being incorporated into a network system as one of processors constituting said network system in which said processors are connected in series by connecting one set of said receiver and transmitter in one processor to one set of said transmitter and receiver in a next processor by communication cables, respectively, one of the processors operates as a master node, an audio transport frame generated by the master node circulates along a ring transmission route formed among said processors in said network system at a constant period, said audio transport frame including a plurality of storage regions for audio signals, and each of said processors writes and/or reads audio signals to/from the audio transport frame, to thereby transport the audio signals between a series of connected processors,

said audio transport frame further including an asynchronous data region for storing asynchronous data,
said audio signal processor comprising:
a first asynchronous data handler that, when said audio signal processor receives an audio transport frame with a free token indicating that said asynchronous data region is not occupied, and asynchronous data to be transmitted exists in said audio signal processor, transmits said audio transport frame to next processor after writing the asynchronous data into said asynchronous data region;
a second asynchronous data handler that, when said audio signal processor receives an audio transport frame with asynchronous data written in said asynchronous data region by a processor other than said audio signal processor, retrieves said asynchronous data from said asynchronous data region and transmits said audio transport frame to the next processor without changing the data in said asynchronous data region;
and
a third asynchronous data handler that, when said audio signal processor receives an audio transport frame with asynchronous data written in said asynchronous data region by the audio signal processor, and asynchronous data to be transmitted does not remain in said audio signal processor, transmits said audio transport frame to the next processor after writing said free token into said asynchronous data region.

3 more elements

A network system composed of consecutive two or more of a plurality of nodes connected in series, wherein each of said plurality of nodes comprising two sets of receivers and transmitters each performing communication in a single direction, one node and a next node are connected in the series by connecting one set of said receiver and transmitter in the one node to one set of said transmitter and receiver in the next node by communication cables, respectively, one of the nodes operates as a master node, and a transport frame generated by the master node circulates along a ring transmission route formed among said nodes in said network system at a constant period,

said transport frame further including an asynchronous data region for storing asynchronous data,
each node of said nodes constituting said network system comprising:
a first asynchronous data handler that, when the node receives a transport frame with a free token indicating that said asynchronous data region is not occupied, and asynchronous data to be transmitted exists in the node, transmits said transport frame to next node after writing the asynchronous data into said asynchronous data region;
a second asynchronous data handler that, when the node receives a transport frame with asynchronous data written in said asynchronous data region by a node other than the node, retrieves said asynchronous data from said asynchronous data region and transmits said transport frame to the next node without changing the data in said asynchronous data region;
and
a third asynchronous data handler that, when the node receives a transport frame with asynchronous data written in said asynchronous data region by the node, and asynchronous data to be transmitted does not remain in the node, transmits said transport frame to the next node after writing said free token into said asynchronous data region.

3 more elements

Dependencies are inferred from the claim text.