Lattice Semiconductor Corporation

Silicon Image Gmbh

Chandlee B Harrell

Gyudong Kim

Baegin Sung

Inyeol Lee

Shrikant Ranade

Shinje Tahk

Hanwoong Sohn

Sun Woo Baek

Sergey Yarygin

Jeffrey M Gilbert

Hoon Choi

Laurence Alan Thompson

Ju Hwan Yi

Young Il Kim

Jiong Huang

Kihong Kim

Jaeryon Lee

Payam Kermani

MyounHwan Kim

Alexander Pevsakhovich

Joohong Choi

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 of the present disclosure are related to identifying the orientation of a multimedia link connected between a source device and a sink device. A sink device includes a plurality of pins that are configured to interface with a plurality of pins of the multimedia link. The sink device identifies based on the values of one or more pins of the plurality of pins of the sink device whether the multimedia link is connected to the sink device. Further, the sink device determines an orientation of the multimedia link connected to the sink device. The multimedia link can be in one of two orientations, straight or flipped. The sink device may communicate the orientation of the multimedia link to the source device. The source device may perform lane mapping based on whether the multimedia link is in the straight or flipped orientation.

Detecting the orientation of a multimedia link connected to a device

A device converts between electrical duplex and optical signals. In one embodiment, such a device includes an echo cancellation circuit that reduces the echo from an incoming optical signal.

Electrical duplex to optical conversion

Embodiments of the invention are generally directed to simultaneous transmission of clock and bidirectional data over a communication channel. An embodiment of a transmitting device includes a modulator to generate a modulated signal including a clock signal and a data signal, the clock signal being modulated by a first signal edge of the modulated signal and the data signal being modulated by a position of a second signal edge of the modulated signal; a driver to drive the modulated signal on a communication channel; an echo canceller to subtract reflected signals on the communication channel; and a data recovery module to recover a signal received on the communication channel, the received signal being encoded by Return-to-Zero (RZ) encoding, the signal being received simultaneously with driving the modulated signal on the communication channel.

Simultaneous transmission of clock and bidirectional data over a communication channel

Embodiments of the invention are generally directed to multiple protocol tunneling using time division operations. An embodiment of an apparatus includes an interface for communication with a second apparatus, the interface including a shared communication link; and a multiplexer to multiplex data of each of multiple protocols into time slots for transmission, the protocols including a first protocol. The time slots are distributed among the protocols, where the distribution of the time slots among the protocols includes assigning one or more time slots to the first protocol to enable the data of the first protocol to meet one or more performance requirements for the first protocol.

Multiple protocol tunneling using time division operations

In one embodiment, a source device and sink device communicate with one another via a multimedia link. The multimedia link includes a cable and a plug. The cable includes one or more data lines, power lines, ground lines or control bus lines. The plug includes a plurality of pins each connected to the one or more lines included in the cable. The plug also includes a ground plane and a power plane, wherein a ground pin of the plug connects the ground plane to the ground line of the cable of the multimedia link and a power pin of the plug connects the ground plane to the power line of the cable. In one example, the ground plane and power plane are placed within a threshold distance of one another, such that the power line connected to the power plane via the power pin behaves as a signal return path.

Multimedia link having a plug and a receptacle with a power line configured as a signal return path

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.

Method, apparatus and system for communicating sideband data with non-compressed video

Embodiments of the invention are generally directed to detection of cable connections for electronic devices. An embodiment of an apparatus includes a port for the connection of a cable, the port being compatible with a first protocol and a second protocol, the port including a connector for the second protocol, the port including multiple pins including a first pin and a second pin. The apparatus further includes a pull-up resistor coupled between the first pin and a voltage source, a pull-down resistor coupled between the second pin and ground, and a voltage detection element coupled with the second pin. The apparatus is to determine that a cable compatible with the first protocol is connected to the port if the voltage detection element detects a voltage above a first threshold.

Detection of cable connections for electronic devices

Embodiments of the invention are generally directed to detection of cable connections for electronic devices. An embodiment of an apparatus includes a port for the connection of a cable, the port being compatible with a first protocol and a second protocol, the port including multiple pins including a first pin for a first line and a second pin for a second line. The apparatus further includes a processor to determine a type of source device connected to the cable, where determination of the type of source device includes the apparatus detecting a low signal on the first line and a high signal on the second line, and, upon detecting the low signal on first line and the high signal on the second line, the apparatus initiates a discovery sequence, the discovery sequence including transmitting a signal sequence on the second line and attempting to receive the signal sequence on the second line. If the signal sequence is successfully received on the second line, the apparatus determines that a source device compatible with the first protocol is connected to the cable.

Growing community of inventors

Los Altos, CA, United States of America

Chandlee B Harrell