Samsung patents audio sync method using hidden frequency patterns
Samsung describes a method for synchronizing audio between a source device and an external microphone. The system embeds a specific pattern by adjusting the volume of certain sound frequencies at set times. The microphone detects this pattern to align the recorded audio with the original output.
In the filing’s own words
An audio signal processing method including obtaining a first audio signal by generating a pattern in association with the first audio signal to be output, outputting the first audio signal, receiving, through an external voice input device while the external voice input device is communicatively connected to the audio signal processing device, a second audio signal including the output first audio signal, detecting the pattern from the second audio signal, and synchronizing the second audio signal with the first audio signal based on the pattern detected from the second audio signal and the pattern included in the first audio signal.
What exactly they claim (claim 1)
1. An audio signal processing method performed by an audio signal processing device, the audio signal processing method comprising: in response to an external voice input device being used to receive an external audio signal, obtaining a first audio signal by generating a pattern in an audio signal to be output, wherein generating the pattern comprises, at a selected time point of the audio signal, adjusting a magnitude of one or more frequency components of the audio signal such that the adjusted magnitude is greater than or equal to a predetermined reference value or less than or equal to a predetermined reference value; outputting the first audio signal; receiving, through a microphone of the external voice input device while the external voice input device is communicatively connected to the audio signal processing device, a second audio signal including the output first audio signal; detecting the pattern from the second audio signal, wherein detecting the pattern comprises identifying, in the second audio signal, the one or more frequency components whose magnitudes are greater than or equal to the predetermined reference value or less than or equal to the predetermined reference value at the selected time point; and synchronizing the second audio signal with the first audio signal by comparing the pattern detected from the second audio signal with the pattern included in the first audio signal.
Facts
- Company
- Samsung (SAMSUNG ELECTRONICS CO., LTD.)
- Official title
- Audio signal processing device and operating method therefor
- Patent number
- US12755750B2
- Application number
- 18104875
- Filed
- Feb 2, 2023
- Granted
- Oct 6, 2026
- Inventors
- 5
- Claims
- 13
Classified under
G10L 21/055 Physics & computingG10L 21/0208 Physics & computingG10L 25/78 Physics & computingG10L 2021/02082 Physics & computingMore from Samsung in Audio & voice
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.