Patent ID: 11915710
Assignee: ACER INCORPORATED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. An embedding method of audio watermarks adapted for a conference terminal, and the embedding method of audio watermarks comprising:
receiving, by the conference terminal, a first speech signal from a first network packet via a network interface, and receiving, by the conference terminal, a first audio watermark signal from a second network packet via the network interface, wherein the first speech signal comprises a signal recorded from a voice of a speaker through another conference terminal, the first audio watermark signal corresponds to the another conference terminal;
processing, by the conference terminal, the first speech signal via a host path of the conference terminal through connecting the first speech signal with a first application in an application layer of an audio processing architecture to output a second speech signal, and processing, by the conference terminal, the first audio watermark signal via an offload path of the conference terminal through connecting the first audio watermark signal with a second application in the application layer of the audio processing architecture to output a second audio watermark signal, wherein an audio engine of the conference terminal has the host path and the offload path for providing audio processing objects (APOs) of the conference terminal implementing digital signal processing effects, the host path provides more digital signal processing effects than the offload path, the audio engine is located between the application layer and a driver layer of the audio processing architecture,
the audio engine provides, for the first application, a stream effect, a mode effect, and an endpoint effect of the APOs with system pins to a driver of the driver layer in the host path,
the audio engine provides, for the second application, an offload stream effect and offload mode effect of the APOs with offload pins to the driver of the driver layer in the offload path, and the first audio watermark signal is subjected to gain adjustment without undergoing voice-related signal processing;

adding the second audio watermark signal to the second speech signal to generate a synthesized audio signal; and
playing the synthesized audio signal through a loudspeaker of the conference terminal.