Abstract: Methods and systems for optimizing a routing of audio data to audio transmitting devices using a Bluetooth network are disclosed. One method includes receiving an encoded audio bitstream at a first speaker of the audio rendering system comprising a first and a second audio channels, separating a first set of spectral components of the first audio channel and a second set of spectral components of the second audio channel from the encoded audio bitstream, without decoding the audio bitstream, generating a first encoded bitstream from the first set of spectral components, and forwarding the first encoded bitstream to a second speaker of the audio rendering system over the wireless link.

Abstract: Methods for communicating audio and voice signals as well as hearable devices therefor are disclosed. A disclosed method includes creating an audio and voice Bluetooth communication link between a computing device and a hearable device. The audio and voice Bluetooth communication link includes a downlink and an uplink. The method further includes configuring the downlink with a downlink audio codec and the uplink with an uplink voice codec and receiving, by the hearable device through the downlink, a channel of a downlink audio signal from the computing device. The channel is encoded with the downlink audio codec. The method further includes transmitting, to the computing device, an uplink voice signal by the hearable device through the uplink. The uplink voice signal is encoded with the uplink voice codec.

Abstract: The invention relates to a method of determining latency information in a wireless audio system, the wireless audio system comprising at least one wireless receiver, a wireless transmitter and a sound recorder, the method comprising the following steps: transmitting at least one test signal from the wireless transmitter to the wireless receiver, the test signal defining a time reference; playing the test signal at the wireless receiver; acquiring an audio record by the sound recorder while the test signal is played by the wireless receiver; determining, by the sound recorder, a latency information related to the wireless receiver at least based on the time reference and based on the audio record, and the wireless transmitter and the sound recorder being synchronized; transmitting the determined latency information to the wireless transmitter.

Abstract: Audio rendering devices comprising at least one audio rendering unit for playing audio streams, a processing circuit and a wireless communication unit for establishing wireless links and related method are disclosed. One audio rendering device is configured to receive a remote audio stream prioritization policy comprising one or more lists of associations between audio stream attributes and priority values, update a local audio stream prioritization policy based on the remote audio stream prioritization policy, identify audio streams available via wireless links, retrieve audio stream attributes of the available audio streams, select an available audio stream to be played among the available audio streams, based on the updated local audio stream prioritization policy and based on the audio stream attributes of the available audio streams, and play the selected audio stream, by the audio rendering unit of the audio rendering device.

Abstract: A Bluetooth device with a host system and a controller is disclosed. The host system supports a host stack of a Bluetooth protocol, and the controller supports a controller stack of the Bluetooth protocol. The device includes an interface for receiving, at the controller, a piconet-synchronized signal. The device also includes an interface for providing, by the controller to the host system, a derivative of the piconet-synchronized signal. The device also includes a circuit for determining a latency of the providing. The device also includes a circuit for synchronizing, at the host system of the Bluetooth device, a host clock with a timing reference of a master device of the Bluetooth piconet using said latency and the derivative of the piconet-synchronized signal.

Abstract: A Bluetooth audio streaming passthrough, and a method for transmitting an audio stream over a Bluetooth communication link and disclosed. The method is carried out by a source device. An audio codec configuration and a sampling rate of the audio stream are received, the audio stream coming from a streaming application running on the source device. A Bluetooth audio stream between the source device and a sink device is configured using the received audio codec configuration and sampling rate. The first audio stream is received from the streaming application. The received first audio stream is packetized into the Bluetooth audio stream. The Bluetooth audio stream is transmitted to the sink device over the Bluetooth communication link, including the packetized received audio stream.

Abstract: A method and multimedia device for calibrating audio delays of an audio system with wireless loudspeakers are disclosed. The method allows to emulate surround or 3D sound systems with spatially distributed wireless loudspeakers. A first probe signal for audio playback, having a first audio pattern, is transmitted by a loudspeaker. A signal quality is determined by listening to an acoustic response of the loudspeaker to the first probe signal. A second audio pattern is determined by modifying the first audio pattern based on the signal quality. A second probe signal for audio playback having the second audio pattern is transmitted by the loudspeaker. An audio delay compensation is then determined for the loudspeaker based on a measure of an audio delay between the transmitted second probe signal and an acoustic response of the loudspeaker in response to the second probe signal.

Abstract: A Bluetooth device with a host system and a controller is disclosed. The host system supports a host stack of a Bluetooth protocol, and the controller supports a controller stack of the Bluetooth protocol. The device includes an interface for receiving, at the controller, a piconet-synchronized signal. The device also includes an interface for providing, by the controller to the host system, a derivative of the piconet-synchronized signal. The device also includes a circuit for determining a latency of the providing. The device also includes a circuit for synchronizing, at the host system of the Bluetooth device, a host clock with a timing reference of a master device of the Bluetooth piconet using said latency and the derivative of the piconet-synchronized signal.

Abstract: The invention relates to a method of determining latency information in a wireless audio system, the wireless audio system comprising at least one wireless receiver, a wireless transmitter and a sound recorder, the method comprising the following steps: transmitting at least one test signal from the wireless transmitter to the wireless receiver, the test signal defining a time reference; playing the test signal at the wireless receiver; acquiring an audio record by the sound recorder during the test signal is played by the wireless receiver; determining, by the sound recorder, a latency information related to the wireless receiver at least based on the time reference and based on the audio record, the wireless transmitter and the sound recorder being synchronized; transmitting the determined latency information to the wireless transmitter.

Abstract: A Bluetooth device with a host system and a controller is disclosed. The host system supports a host stack of a Bluetooth protocol, and the controller supports a controller stack of the Bluetooth protocol. The device includes an interface for receiving, at the controller, a piconet-synchronized signal. The device also includes an interface for providing, by the controller to the host system, a derivative of the piconet-synchronized signal. The device also includes a circuit for determining a latency of the providing. The device also includes a circuit for synchronizing, at the host system of the Bluetooth device, a host clock with a timing reference of a master device of the Bluetooth piconet using said latency and the derivative of the piconet-synchronized signal.

Abstract: A Bluetooth device with a host system and a controller is disclosed. The host system supports a host stack of a Bluetooth protocol, and the controller supports a controller stack of the Bluetooth protocol. The device includes an interface for receiving, at the controller, a piconet-synchronized signal. The device also includes an interface for providing, by the controller to the host system, a derivative of the piconet-synchronized signal. The device also includes a circuit for determining a latency of the providing. The device also includes a circuit for synchronizing, at the host system of the Bluetooth device, a host clock with a timing reference of a master device of the Bluetooth piconet using said latency and the derivative of the piconet-synchronized signal.

Abstract: Disclosed is a device (DEV) for controlling Bluetooth multimedia devices, the controlling device including a Bluetooth chip (BC) arranged to implement a modified A2DP profile (A2DP?) so as to create a point-to-multipoint link (LNK) from the Bluetooth chip to several Bluetooth multimedia devices (SPK1, SPK2, SPKN), the Bluetooth chip of the controlling device being arranged to stream several interconnected multimedia streams, each to a respective Bluetooth multimedia device from among the several Bluetooth multimedia devices, based on a non-blocking Bluetooth usage. The description also refers to a method for controlling Bluetooth multimedia devices, to a computer program arranged to implement such a method as well as to a storage medium storing such a computer program.

Abstract: Disclosed is a device for controlling wireless multimedia devices, including: a wireless communication circuit, to receive a wireless multimedia device identifier from each wireless multimedia device; an access circuit for accessing a database of wireless multimedia devices, to obtain from the database characteristics of each wireless multimedia device for which the communication circuit has received an identifier; a separation circuit for separating a main multimedia stream into as many separated multimedia streams as the communication circuit has received identifiers of wireless multimedia devices; an allocation circuit for allocating each separated multimedia stream to a respective wireless multimedia device; and a synchronization circuit for synchronizing the separated multimedia streams based on the characteristics of the wireless multimedia devices obtained from the database.