A wireless speaker system configured to receive stereo audio information wirelessly transmitted by an audio source including first and second loudspeakers. The first loudspeaker establishes a bidirectional secondary wireless link with the audio source for receiving and acknowledging receipt of the stereo audio information. The first and second loudspeakers communicate with each other via a primary wireless link, and the first and second loudspeakers are configured to extract first and second audio channels, respectively, from the stereo audio information. A wireless audio system including an audio source and first and second loudspeakers, each having a wireless transceiver. The first and second loudspeakers communicate via a primary wireless link. The audio source communicates audio information to the first loudspeaker via a secondary wireless link which is configured according to a standard wireless protocol. The first loudspeaker is configured to acknowledge successful reception of audio information via the secondary wireless link.

Un-tethered wireless stereo speaker system

A wireless speaker system may include a primary speaker including a first transceiver and a second transceiver and programmed to receive audio data from a user device at the first transceiver, and at least one secondary speaker including a receiver and programmed to receive a wireless signal including the audio data from the primary speaker at the receiver, each speaker configured to transmit audio signals consistently there between based on the received audio data.

Wireless speaker system

A wireless speaker audio system configured to receive audio information wirelessly transmitted by an audio source including first and second wireless transceivers. The first wireless transceiver establishes a bidirectional secondary wireless link with the audio source for receiving and acknowledging receipt of the audio information. The first and second wireless transceivers communicate with each other via a primary wireless link. A wireless audio system including an audio source and first and second wireless transceivers. The first and second wireless transceivers communicate via a primary wireless link. The audio source communicates audio information to the first wireless transceiver via a secondary wireless link which is configured according to a standard wireless protocol. The first wireless transceiver is configured to acknowledge successful reception of audio information via the secondary wireless link.

Un-tethered wireless audio system

Exemplary embodiments include a system having a first wireless audio output device configured to connect to a source device via a first piconet and a second wireless audio output device configured to connect to the first wireless audio output device via a second piconet. A schedule of the first piconet includes a plurality of slots associated with an audio packet, a first subset of the slots used by the source device to transmit the audio packet, the first and second wireless audio output devices tuning to the first piconet to listen for the transmissions of the audio packet, and when, after a last one of the first subset of slots, the first or second wireless audio output devices did not receive the audio packet, the first and second wireless audio output devices exchange information via the second piconet such that the both wireless audio output device receive the audio packet.

Real-time relay of wireless communications

A data source sends a synchronization signal and information to several data sinks that use the synchronization signal and a specified parameter to determine when to process the information. The data source and data sinks may comprise wireless nodes such as, for example, a wireless audio source that sends multi-channel data to a pair of wireless earpieces. The wireless earpieces use the synchronization signal and a latency interval to determine the appropriate time to output audio based on the audio channels.

Synchronization of signals for multiple data sinks

A system and method is described herein in which an audio source wirelessly transmits audio content to a first audio sink over one wireless link and to a second audio sink over another wireless link. The two audio sinks also exchange forward error correction (FEC) streams over a wireless link between the two audio sinks, wherein the FEC streams are generated by FEC encoding the audio content received from the audio source. The audio sinks advantageously use the exchanged FEC information to synchronize the playback of the audio content as well as to improve the robustness of the wireless links with the audio source in a manner that does not consume additional bandwidth on those links.

Dual streaming with exchange of fec streams by audio sinks

A system and method for discarding or inserting audio frames in a jitter buffer is described. The system and method provides improved audio quality as compared to conventional jitter buffer management systems. In one embodiment, buffer control logic determines whether to discard audio frames to be stored in a jitter buffer or to insert audio frames among audio frames to be output from a jitter buffer based not only on the number of audio frames currently stored in the jitter buffer but also based on the power of the current audio frame to be stored in or output from the jitter buffer. The system and method is generally applicable to any wireless or wired communication system in which audio signals are transmitted between entities operating in different clock domains.

Jitter buffer adaptation based on audio content

In a Bluetooth™ Sub-band Codec (SBC), the size of a bit pool allocated for encoding is adapted in a manner that is dependent upon the audio content that is being encoded. In one implementation, the size of the bit pool is increased during periods when the audio input signal represents an active audio signal, such as speech or music, and decreased when the audio input signal represents background noise or silence. This has the effect of increasing the bit rate (and thus the audio quality) in the presence of speech or music but decreasing the bit rate (and thus the audio quality) in the presence of background noise or silence. By adapting the size of the bit pool in this manner, the quality of the encoded bit-stream transmitted from the SBC encoder may be improved or power may be conserved depending upon the implementation.

Adaptive bit pool allocation in sub-band coding

Aspects of a method and system for a distributed Bluetooth® Host Architecture may include combining a single main Bluetooth® host with subsidiary Bluetooth® hosts to form a distributed Bluetooth® processing entity that operates as a single Bluetooth® host for a Bluetooth® host controller. An active data connection may be handed over between the main Bluetooth® host and the subsidiary Bluetooth® hosts, where the active data connection may be between the Bluetooth® host controller and the distributed Bluetooth® entity. The active data connection may be an Asynchronous connection-less (ACL) link or a Synchronous Connection-Oriented (SCO) link. Layers of a protocol stack of the main Bluetooth® host may be synchronized with one or more of the subsidiary Bluetooth® hosts to achieve hand over.

Method and system for a distributed bluetooth® host architecture

A system and method is described for updating the state of an audio decoder, such as a CVSD decoder, after a packet loss has occurred. In response to the loss of a packet, the system and method encodes audio samples produced by a packet loss concealment (PLC) algorithm and effectively passes the encoded audio samples through the audio decoder in lieu of the contents of the lost packet. This operation brings the state of the audio decoder into better synchronization with the state of a remote audio encoder, thereby reducing or minimizing the degrading effect of the packet loss on the perceived quality of an output audio signal produced by a voice processing system that includes the audio decoder.

Mickael Jougit

Papers

Dual streaming with exchange of fec streams by audio sinks

Jitter buffer adaptation based on audio content

Adaptive bit pool allocation in sub-band coding

Method and system for a distributed bluetooth® host architecture

Cvsd decoder state update after packet loss