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1460results about "Multiplex communication" patented technology

Network Audio Distribution System and Method

System and methods for distributing audio content from plural audio sources to plural client terminals located on a network. The system includes an audio source interface that is coupled to receive raw audio from a first audio source, and converts the raw audio into a digital audio clip that is incorporated into a digital audio packet, which further contains a timestamp and a channel identity corresponding to the first audio source. A network audio server is coupled to receive the digital audio packet from the audio source interface, and operates to format the digital audio packet into a digital audio file that is compliant with the network, and store the digital audio file at a network address. The network audio server generates a directory packet that includes the network address of the digital audio file, the channel identity, and the timestamp, and couples the directory packet to a directory server located on the network. The directory server receives the directory packet and generates a directory stream, including at least a portion of the directory packet, and couples the directory stream through the network to a first client terminal. The first client terminal receives the directory stream and selectively identifies the directory packet according to a client profile, and subsequently communicates an audio file request through the network, requesting the digital audio file from the network audio server. Then, upon receipt of the audio file request, the audio server responds by coupling the digital audio file to the client terminal through the network.

Auto-polling unit for interrupt generation in a network interface device

A system and method for auto-polling a status register within a physical layer (PHY) interface to a local area network (LAN). The system includes a host CPU which needs to detect and service interrupts generated by a PHY device on the LAN which is coupled between a first transmission medium (such as copper or fiber cable) and a management interface to the system. The system further includes an auto-polling unit which monitors activity on the management interface of the PHY device. When the auto-polling unit detects a lack of activity on the management interface of the PHY for a predetermined interval, the auto-polling unit reads a first value from the PHY status register. This first status value is then compared to a previously stored value which corresponds to the last PHY status value read by the host CPU. If a mismatch is detected between these two values, an interrupt is generated to the CPU. In response to receiving the interrupt, auto-polling is suspended (to avoid changing the status data that caused the interrupt) and the CPU requests a read of the status value in the first register. In this manner, the CPU is able to access the status value which caused the interrupt and determine the appropriate course of action. This status read by the CPU also has the effect of clearing the interrupt. This system frees the CPU from having to continually poll the PHY status register to determine if a change in status has occurred.
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