Packet Based Delivery of Multi-Channel Audio over Wireless Links

摘要

The present disclosure is directed to systems, apparatuses, and methods for wirelessly delivering multi-channel audio over a packet based network with tight synchronization, high fidelity, and/or low delay as described above. The systems can include a source device that provides multi-channel audio to a distributor device, which wirelessly distributes the multi-channel audio over the packet based network to audio rendering devices, referred to as “sink” devices. The distributor device and the sink devices each include a playback clock that is used to read audio samples of the multi-channel audio from a local memory and drive a digital-to-analog converter (DAC) coupled to a speaker to render the audio samples.

主权项

1. A distributor device comprising:
a buffer configured to store audio samples received from a source device; a network clock generator configured to provide a network timer based on a network clock synchronized with network clocks at sink devices; a playback clock configured to provide a playback timer based on a playback clock used to playback, at the distributor device, a first portion of audio samples retrieved from the buffer; a playback clock tuner configured to tune the playback clock based on an amount of data stored in the buffer; and an application level processor configured to place a sample of the playback timer, a sample of the network timer associated with the sample of the playback timer, and a second portion of the audio samples retrieved from the buffer into a packet for transmission to the sink devices.