Lattice Semiconductor Corporation

Silicon Image Gmbh

Sergey Yarygin

Taliaferro Smith

Gyudong Kim

Chandlee B Harrell

Laurence Alan Thompson

Jiong Huang

Jaeryon Lee

Payam Kermani

A sink device transmits capabilities information associated with the sink device to the source device. The source device, responsive to receiving the capabilities information of the sink device generates a multimedia stream, and transmits the generated multimedia stream to the sink device to be output to the user. The sink device identifies a portion of the capabilities information that has changed and transmits to the source device a notification notifying the source device that a portion of the capabilities information has changed. The source device transmits a request for the portion of the capabilities information that has changed to the sink device. The sink device responsive to receiving the request transmits the portion of the capabilities information that has changed to the source device. The source device then modifies the multimedia stream output to the sink device based on the portion of the capabilities information that has changed.

System for dynamic audio visual capabilities exchange

The discovery of a topology of a network with an unknown topology can enable the selection of a data path within the network, and the establishment of a data stream over the selected data path. Routing tables mapping originating nodes to input ports can be created based on the receipt of discovery messages generated by the originating nodes. A source node can select a data path between the source node and a sink node in order to establish a data stream using the routing tables. Data paths can be selected based on, for instance, routing table bandwidth information, latency information, and/or distance information. Data streams can be established over the selected data path, and each node can release any reserved output bandwidth determined to be unnecessary for the data stream.

Stream creation with limited topology information

Embodiments of the present disclosure relate to transmitting or receiving a media stream and associated control parameter over different physical channels. The transmitter transmits a media stream over a first physical channel and at least one associated control parameter along with a time parameter associated with a part of the media stream over a second physical channel. The associated control parameter along with the time parameter is sent before the media stream to the receiver. The receiver processes the media stream, by extracting the control parameter and time parameter associated with a part of the media stream, and at least applying the extracted control parameter to the part of the media stream.

Media stream data and control parameter synchronization

A device may communicate a delay request value to downstream devices in order to synchronize A/V streams. For example, rather than adding the delay required to synchronize audio and video streams, an A/V splitter may instead communicate to downstream devices, asking them to add the amount of delay desired.

Method for synchronizing A/V streams

Aspects relate to transmission of metadata from a source to a sink device, and optionally through one or more intermediaries. A source device encodes metadata into what would have been a blanking area of a field to be transmitted, according to a current video format. The source device encodes a timing for an active video data signal that is modified from a timing that would be used only for transmission of video data at a current resolution. A separate indicator from the source, or a negotiation between source and sink allows the sink to determine what part of the data indicated as being active video data is metadata, and to use that metadata for controlling aspects of the video display, and to use other parts of the received video data as video data for display. A sink can signal supported capabilities to a source.

Metadata transfer in audio video systems

Embodiments relate to identifying a topology of a network based on information identifying adjacent devices from each of the devices in the network. In one embodiment, each device identifies one or more adjacent devices within one hop and stores information identifying the one or more adjacent devices. A requesting device aggregates information identifying one or more adjacent devices of each device and identifies the topology of the network based on the aggregated information. By each device storing and transmitting information identifying adjacent devices connected within one hop, amount of information stored in each device and bandwidth of information exchanged can be reduced.

Network topology discovery

A system of devices includes a plurality of devices such as a sink device, a source device and an intermediate device. In one embodiment, a first device propagates to a second device, via a multimedia link, an address of the first device in association with an indication that the first device is a master for a remote control command type. The second device responsive to receiving a remote control command from a remote control identifies the remote control command type of the remote control command. Responsive to the command type of the received remote control command being the remote control command type that the first device is the master for, the second device forwards the received remote control command using the address of the first device. The first device upon receiving the remote control command modifies a multimedia output by the first device based on the remote control command received.

Control target selection

Techniques and mechanisms for communicating sideband information in a data frame including video data. In an embodiment, a data frame is exchanged between two device via a hardware interconnect which is compatible with physical layer requirements of an interface specification. The interface specification identifies a data frame format comprising a total of X consecutive horizontal lines of vertical blanking data and a total of Y consecutive horizontal lines of data including video data. In another embodiment, vertical blanking data of the data frame includes only (X&#x2212;N) consecutive horizontal lines of data. Active data of the data frame includes N horizontal lines of data including sideband data, and Y additional horizontal lines of data including video data.

Growing community of inventors

San Jose, CA, United States of America

Sergey Yarygin