US 2020/0396015 A1Published application

Audio playback system and method

AssigneeRealtek Semiconductor Corp.

InventorsYi-Fan CHIU, You-De Liu

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Abstract

An audio playback system that includes audio playback devices each including a communication module, a playback module and a processing module is provided. The communication module receives a beacon signal and audio signal packets and generates an interrupt signal. The processing module receives the interrupt signal to retrieve an audio source timestamp corresponding to an audio source system time from the beacon signal, compares the audio source timestamp with an internal time generated based on an internal system time when the beacon signal is received to calculate a difference therebetween, receives a playback initialization signal from the audio source device that includes an audio source system playback initialization time, calculates an internal system playback initialization time according to the difference and the audio source system playback initialization time and controls the playback module to playback the audio signal packets from the internal system playback initialization time.

Claims10

Dependent claims

An audio playback system comprising:

a plurality of audio playback devices each comprising:
a communication module configured to receive a beacon signal and a plurality of audio signal packets from an audio source device and generates an interrupt signal while receiving the beacon signal;
a playback module;
and
a processing module configured for:
receiving the interrupt signal through the communication module to retrieve an audio source timestamp corresponding to an audio source system time from the beacon signal and comparing the audio source timestamp with an internal time generated based on an internal system time when the beacon signal is received to calculate a difference between the audio source system time and the internal system time;
receiving a playback initialization signal from the audio source device through the communication module that comprises an audio source system playback initialization time set according to the audio source system time;
calculating an internal system playback initialization time according to the difference and the audio source system playback initialization time;
and
controlling the playback module to playback the audio signal packets from the internal system playback initialization time.

7 more elements

An audio playback method comprising:

receiving a beacon signal and a plurality of audio signal packets from an audio source device and generating an interrupt signal while receiving the beacon signal by a communication module comprised in each of a plurality of audio playback devices;
receiving the interrupt signal through the communication module to retrieve an audio source timestamp corresponding to an audio source system time from the beacon signal by a processing module of each of the plurality of audio playback devices;
comparing the audio source timestamp with an internal time generated based on an internal system time when the beacon signal is received to calculate a difference between the audio source system time and the internal system time by the processing module;
receiving a playback initialization signal from the audio source device through the communication module that comprises an audio source system playback initialization time set according to the audio source system time by the processing module;
calculating an internal system playback initialization time according to the difference and the audio source system playback initialization time by the processing module;
and
controlling the playback module to playback the audio signal packets from the internal system playback initialization time by the processing module.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/885,793Filed 28 May 2020
Priority: TW 10812092917 Jun 2019
Published: 17 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04J 3/0661
Clock or time synchronisation among packet nodes: using timestamps
G06F 3/165
Sound input; Sound output: management of the audio stream, e.g. setting of volume, audio stream path
H04J 3/0632
Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers: synchronisation of packets and cells, e.g.…
H04W 56/001
Synchronisation arrangements: synchronization between nodes

Family

US 11,418,275 B2Related patent
US 2020/0396015 A1This patent

From the US filing history. Foreign family members aren’t listed.

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