Audio synchronization and delay estimation
a delay estimation and audio synchronization technology, applied in the direction of instruments, electric digital data processing, loudspeaker spatial/constructional arrangement, etc., can solve the problem of delay in the sound of the speaker compared to the sound produced by the electronic devi
Inactive Publication Date: 2020-03-19
POWERCHORD GRP
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This patent describes a system and technique for synchronizing audio signals and estimating delay between them. The technical effect is that this system can help adjust the playback of audio signals based on the relative delay value, ensuring that the audio is synced and aligned accurately.
Problems solved by technology
When the audio signal arriving at the electronic device is used to produce sound based on the audio signal, the sound from the speakers may be delayed compared to the sound produced by the electronic device.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016]Audio synchronization and delay estimation may allow for the synchronization at the location of an electronic device of sound produced by the electronic device using a received audio signal with sound produced by speakers located some distance from the electronic device using another received signal from the same original source as the audio signal received at the electronic device. The delay between the audio signal arriving at the electronic device and the sound produced by the speakers arriving at the location of the electronic device may be estimated. The estimated delay may be used to delay production of sound by the electronic device using the received audio signal by slowing down playback of the audio signal. This may result in the sound produced by the electronic device synchronizing with the sound arriving at the location of the electronic device from the speakers, so that a listener at the location of the electronic device doesn't hear the sound from the audio signal...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
Systems and techniques are provided for audio synchronization and delay estimation. Audio metadata including a first discrete Fourier transform representation may be received. An audio signal may be pre-processed. A second discrete Fourier transform representation may be generated from the pre-processed audio signal. A correlation result in a discrete Fourier transform representation may be generated based on an element-wise multiplication of the first and second discrete Fourier transform representations. An inverse Fourier transform may be performed on the correlation result in a discrete Fourier transform representation to generate a correlated signal including samples that may have a position and a value. A relative delay value may be determined based on the position of a sample having a value with the greatest magnitude. Playback of a second audio signal may be adjusted based on a current delay value adjusted based on the relative delay value.
Description
BACKGROUND[0001]The same audio signal can be delivered to both speakers in a venue, and to electronic devices within the venue. The sound produced by the speakers based on the audio signal may arrive at the location of an electronic device within the venue after the audio signal arrives at the electronic device. When the audio signal arriving at the electronic device is used to produce sound based on the audio signal, the sound from the speakers may be delayed compared to the sound produced by the electronic device. If the electronic device is mobile, the size of the delay between the sound from the speakers and the sound from the electronic device may change as the distance between the electronic device and the speakers changes.BRIEF SUMMARY[0002]According to implementations of the disclosed subject matter, an audio signal may be pre-processed at a transmitter to generate a transmitter pre-processed audio signal including samples including a value and having a position in the trans...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): G06F3/16H04R3/12H04R3/04H04S7/00H04R5/02H04R27/00
CPCH04S7/301H04R27/00G06F3/165H04R2227/003H04R3/04H04R5/02H04R3/12H04R2420/07
Inventor TULL, GRAHAMBASTHOLM, TROELSERIKSEN, MADS BERRERASMUSSEN, KURT HEICKLINDOF, JENS CHRISTIAN
Owner POWERCHORD GRP