Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a peripheral device may synchronize a local clock to an access point timing synchronization function clock (TSF_AP) that is maintained by an access point (AP) connected to the peripheral device. The peripheral device may maintain, based at least in part on the local clock, an estimated time-to-play timing synchronization function clock (TSF_est) that is associated with outputting user data. The peripheral device may receive, from the AP, timing synchronization information that is based at least in part on a comparison between a wireless communication device (WCD) time-to-play timing synchronization function software clock (TSF_soft) and the TSF_est. The peripheral device may output the user data based at least in part on the TSF_est and the timing synchronization information. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device (WCD) may perform a clock tracking procedure that comprises: transmitting, to an access point (AP), an extended personal area network (XPAN) synchronization message pair that is addressed to a peripheral device associated with the WCD, and receiving, from the AP, an XPAN synchronization response message pair that is associated with the XPAN synchronization message pair. The WCD may transmit, to the AP, user data that is addressed to the peripheral device at a time that is based at least in part on an estimated awake window, the estimated awake window being based at least in part on the XPAN synchronization response message pair. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. In a wireless audio system, a first wireless device may generate a first media stream associated with a first media mode and a second media stream associated with a second media mode, buffer the first media stream in accordance with a first latency time value for adjusting a first latency time of the first media stream and buffering the second audio stream, independently from the first media stream, in accordance with a second latency time value for adjusting a second latency time of the second media stream, and transmit a mixed media stream including the buffered first media stream mixed with the buffered second media stream to a second wireless device.

Abstract: Methods, systems, and devices for wireless communications are described. In a wireless audio system, a first wireless device may generate a first media stream associated with a first media mode and a second media stream associated with a second media mode, buffer the first media stream in accordance with a first latency time value for adjusting a first latency time of the first media stream and buffering the second audio stream, independently from the first media stream, in accordance with a second latency time value for adjusting a second latency time of the second media stream, and transmit a mixed media stream including the buffered first media stream mixed with the buffered second media stream to a second wireless device.

Abstract: In general, techniques are described that enable a source device to perform level estimation for processing audio data. The source device may include a memory and a processor. The memory may store at least a portion of the audio data. The processor may obtain a current indication representative of a current level of a current block of the audio data, and obtain a previous indication representative of a previous level of a previous block of the audio data. The processor may perform, based on the current indication and the previous indication, level estimation to obtain a level estimate indication representative of an estimate of the level of the current block of the audio data. The processor may also perform, based on the level estimate indication, compression with respect to the current block of the audio data to obtain a bitstream.

Abstract: A method of defining an acoustic channel in a vehicle or other environment involving providing a respective definition of in-vehicle sound sources, the definitions including a definition of a respective sound associated with each sound source and a respective location within the vehicle associated with each sound source. Segments corresponding to the sounds are identified in an output signal of a microphone located in the vehicle. Definitions of acoustic channels are generated from the output signal segments in respect of the location associated with the respective sound source. The sounds relate to intrinsic parts of the vehicle, for example a door closing or a windshield wiper operating. A map of acoustic channels is maintained and used to compensate audio signals for distortion caused by a relevant acoustic channel. The acoustic map can be updated while the vehicle is driving in response to detection of sounds from the sound sources.

Abstract: A method of determining contexts for a vehicle, each context corresponding to one or more events associated with the vehicle, for example that the radio is on and a window is open. The method comprises detecting sound activities in an audio signal captured in the vehicle, and assigning context to the vehicle based on the detected sound activities. Non-audio data such as the operational status of a vehicle system or device is used to help assign contexts.

Abstract: A method of determining contexts for a vehicle, each context corresponding to one or more events associated with the vehicle, for example that the radio is on and a window is open. The method comprises detecting sound activities in an audio signal captured in the vehicle, and assigning context to the vehicle based on the detected sound activities. Non-audio data such as the operational status of a vehicle system or device is used to help assign contexts.

Abstract: A method of defining an acoustic channel in a vehicle or other environment involving providing a respective definition of in-vehicle sound sources, the definitions including a definition of a respective sound associated with each sound source and a respective location within the vehicle associated with each sound source. Segments corresponding to the sounds are identified in an output signal of a microphone located in the vehicle. Definitions of acoustic channels are generated from the output signal segments in respect of the location associated with the respective sound source. The sounds relate to intrinsic parts of the vehicle, for example a door closing or a windshield wiper operating. A map of acoustic channels is maintained and used to compensate audio signals for distortion caused by a relevant acoustic channel. The acoustic map can be updated while the vehicle is driving in response to detection of sounds from the sound sources.