Audio data transmission system between a master module and slave modules by means of a digital communication network
First Claim
1. A system comprising a digital communication network for data transmission, comprising audio type data, between a master module and a plurality of slave modules, each module comprising at least one network terminal to connect the communication network to the module, at least one network terminal of a slave module being connected to a network terminal of another module by means of the communication network, the system wherein the master module comprises a synchronization clock and supplies data frames comprising synchronization information on its network terminal, each slave module comprising clock reconstitution means, from the synchronization information of the data frames received on its network terminal, and recognition means, synchronized by the associated clock reconstitution means, to recognize the data intended for said slave module so as to ensure synchronous transmission of the data within the system, the system wherein all the data frames are generated by the master module.
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Abstract
The system comprises a master module and slave modules able to be chain-connected and/or star-connected by means of a digital communication network, for example of the Ethernet type. The system is synchronized on the master module clock that supplies synchronization information to all the data frames it sends over the network. Each slave module reconstitutes the clock from the frames it receives. The data frames comprise data packets that can in particular be command data, audio data or video data. Each packet comprises a header describing the content of the packet. Each slave module knows at which location of a packet the data intended for it is located and at which location of a packet it can insert data.
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Citations
20 Claims
- 1. A system comprising a digital communication network for data transmission, comprising audio type data, between a master module and a plurality of slave modules, each module comprising at least one network terminal to connect the communication network to the module, at least one network terminal of a slave module being connected to a network terminal of another module by means of the communication network, the system wherein the master module comprises a synchronization clock and supplies data frames comprising synchronization information on its network terminal, each slave module comprising clock reconstitution means, from the synchronization information of the data frames received on its network terminal, and recognition means, synchronized by the associated clock reconstitution means, to recognize the data intended for said slave module so as to ensure synchronous transmission of the data within the system, the system wherein all the data frames are generated by the master module.
Specification