Advanced Micro Devices Corporation

Carson Ryley Reece Green

Ngoc Vinh Vu

David Robert Stark, Jr

Neil Patrick Kelly

Stephen Mark Ryan

John Zhong-Chen Li

Victor Selvaraj

Systems, apparatuses, and methods for implementing beamforming techniques to choose transceivers in a wireless mesh network are disclosed. Multiple transceivers are deployed in a wireless virtual reality (VR) environment to provide a high quality path to send an encoded video stream from a graphics source to a head-mounted display (HMD) receiver. When a master transceiver connected to the graphics source does not have a line of sight connection to the HMD, the master transmitter sends the encoded video stream on a path though one or more passive transceivers that have good line of sight connections on the path to the HMD. To determine the quality of the wireless links between the various transceivers and the HMD, beamforming training procedures are performed. These beamforming training procedures are implemented to determine how to route the encoded video stream from the master transceiver to the HMD.

Beamforming techniques to choose transceivers in a wireless mesh network

Systems, apparatuses, and methods for scheduling beamforming training during vertical blanking intervals (VBIs) are disclosed. A system includes a transmitter sending a video stream over a wireless link to a receiver. The wireless link between the transmitter and the receiver has capacity characteristics that fluctuate with variations in the environment. To combat the fluctuating capacity characteristics of the link, the transmitter and the receiver perform periodic beamforming training procedures to determine whether to adjust the beamforming characteristics of their respective antennas. To avoid interfering with the video data being sent, the system waits until a VBI to perform a beamforming training procedure. If the beamforming training procedure cannot be completed in a single VBI, then multiple VBIs can be used for performing separate portions of the beamforming training procedure. In one embodiment, the system can perform a beamforming training procedure every N VBIs, where N is a positive integer.

Custom beamforming during a vertical blanking interval

Systems, apparatuses, and methods for performing efficient video transmission are disclosed. In a video processing system, a transmitter sends encoded pixel data to a receiver. The receiver stores the encoded pixel data in a buffer at an input data rate. A decoder of the receiver reads the pixel data from the buffer at an output data rate. Each of a transmitter and the receiver maintains a respective synchronization counter. When detecting a start of a frame, each of the transmitter and the receiver stores a respective frame start count as a copy of a current value of the respective synchronization counter. The transmitter sends its frame start count to the receiver. The receiver determines a difference between the respective frame start counts, and adjusts the decoding rate based on the difference.

Source clock recovery in wireless video systems

Systems, apparatuses, and methods for implementing enhanced beamforming training procedures are disclosed. A system includes a transmitter communicating over a wireless link with a receiver. To maintain a high quality of transmission over the wireless link, the transmitter and receiver perform periodic beamforming training procedures to test the various sectors of the transmit and receive antennas. In a wide sector sweep procedure, the transmitter and receiver test wide sectors to find the best wide transmit and receive sectors for transferring data. Then in a narrow sector sweep procedure, narrow sectors within and/or adjacent to the best wide sectors are tested, to find the best narrow sectors. This reduces the amount of sectors that are tested during the enhanced beamforming training procedure by skipping those narrow sectors that are far away from the best wide sectors.

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Austin, TX, United States of America

Carson Ryley Reece Green