Apple Inc.

Texas Instruments Corporation

Ran Irony

Ran Katz

Alon Paycher

Sriram Hariharan

Robert Denton Silfvast

Sreeraman Anantharaman

Yossi Tsfaty

Eli Dekel

Amihai Kidron

Methods and apparatus for communicating audio packets with ultra-low latency at high data rates from an audio source device to one or more audio output devices over a wireless personal area network (WPAN) connection, such as via a Bluetooth connection. Latency is reduced by using time-efficient audio coding and decoding, limited retransmissions, reduced time and frequency of acknowledgements, and by combining Bluetooth Classic (BTC) packets for downlink audio and downlink control with Bluetooth Low Energy (BTLE) packets for uplink control, uplink acknowledgements, and inter-device wireless communication. The number of retransmissions and packet concealments per frame cycle can be limited to an upper threshold number to satisfy a low latency requirement.

Ultra-low latency audio over bluetooth

In order to reduce the power consumption after a transmitting electronic device in a wireless network has been detected, a receiving electronic device calculates transmit times of subsequent beacons from the transmitting electronic device based on a clock drift of the transmitting electronic device and the beacon period. Then, the receiving electronic device receives the subsequent beacon by opening scan windows that encompass the calculated transmit times. However, because the transmit times are more predictable after the transmitting electronic device has been detected (and the clock drift of the transmitting electronic device is known to the receiving electronic device), the receiving electronic device can reduce the width of the scan windows. In addition, the transmitting electronic device can further reduce the power consumption by increasing the beacon period.

Method and system for synchronized low-energy scans

Synchronized low-energy detection technique

A novel and useful apparatus for and method of integrating the advanced audio distribution profile (A2DP) audio codec into a Bluetooth controller for audio streaming applications. The mechanism functions to break the prior art Bluetooth protocol stack by integrating a profile packet composer into the controller. The profile/stack control signaling is performed by the host while the profile data packet composer is implemented in the controller. The integrated data packet composer does not break the data path and flow control over the standard HCI. Further, the integrated packet composer allows the controller to open a dedicated data interface for specific applications (e.g., PCM/I2S for audio data).

Controller integrated audio codec for advanced audio distribution profile audio streaming applications

A dual-signal wireless transceiver is provided, comprising: a first wireless transceiver circuit configured to transmit and receive first signals using a first protocol; a second wireless transceiver circuit configured to transmit and receive second signals using a second protocol; and a control circuit configured to generate control signals to control operation of the first and second wireless transceiver circuits, wherein the first wireless transceiver circuit is configured to disable second transmission operations by the second wireless transceiver during first transmission operations by the first wireless transceiver circuit through the use of a shutdown signal. In this method, the second protocol allows the second wireless transceiver to retransmit first signals whose transmission was disabled by the shutdown signal. Furthermore, the second protocol is a Bluetooth protocol, and the first protocol is a wireless protocol other than the Bluetooth protocol.

System and method for avoiding interference in a dual-signal device

Growing community of inventors

Hod Hasharon, Israel

Ran Irony