Active auxiliary channel buffering

摘要

A system and a method for communicating configuration data between a source device and a sink are described. An active buffer receives data from an auxiliary communication channel which communicates data between the source device and the sink device. The active buffer modifies data received from the auxiliary communication channel. For example, the active buffer amplifies the received data or electrically reshapes the received data. The modified data is then transmitted from the active buffer to a destination device. In one embodiment, the auxiliary communication channel is bi-directional and upon receiving data from a first device, the active buffer is modified to permit uni-directional transmission of data from the first device to a second device.

主权项

1. A system for communicating configuration data between a source device and a sink device comprising:
a main communication channel coupled to the source device, the main communication channel configured to communicate data from the source device; an auxiliary communication channel coupled to the source device and the sink device, the auxiliary communication channel configured to:
communicate configuration data received from the source device to the sink device, andcommunicate configuration data received from the sink device to the source device; and an active buffer coupled to the source device via the auxiliary communication channel and coupled to the sink device via the auxiliary communication channel, the active buffer configured to:
detect configuration data from the auxiliary communication channel,determine whether the source device or the sink device generated the detected configuration data,responsive to a determination that the detected configuration data was generated by the source device:
enable power to be received by a power supply input of a source signal modification module, the source signal modification module configured to identify a type associated with the detected configuration data and modify at least a portion of the detected configuration data based on the identified type, the source signal modification module having an output coupled to the sink device,further modify, using the source signal modification module, at least a portion of the modified detected configuration data,transmit the further modified configuration data to the sink device via the auxiliary communication channel, andprohibit the configuration data transmitted by the sink device from being received at the source device.