TWI403188B - System and method for automatic adjusting sound of speakers - Google Patents

Description

Speaker sound effect automatic adjustment system and method

The invention relates to a speaker sound effect automatic adjustment system and method.

The speaker, which is the most important part of the sound part of the home theater system, is directly related to the level of sound effect reduction, and has always been the focus of audio-visual enthusiasts in selecting equipment. To get the best cinema effect, the speaker part is a factor that cannot be ignored.

Speakers generally consist of multiple speakers. For example, 2.1 channel speakers include right channel speakers, left channel speakers, and subwoofer channels; 4.1 channel speakers include front right channel speakers, front left channel speakers, rear right channel speakers, and rear Left channel speaker and subwoofer speaker; 5.1 channel speaker including front right channel speaker, front left channel speaker, center channel speaker, rear right channel speaker, rear left channel speaker And subwoofer speakers; 7.1-channel speakers include front right channel speakers, front left channel speakers, center left channel speakers, center channel speakers, center right channel speakers, rear right speakers Channel speaker, rear left channel speaker and subwoofer channel speaker.

In the production process, it is difficult to ensure that each speaker in the speaker plays the audio signal at exactly the same time and pitch, which results in an uncoordinated output audio signal that does not meet the high quality requirements.

In view of the above, it is necessary to provide a speaker sound effect automatic adjustment system and method, which can automatically adjust the time and pitch of each speaker to play audio signals, and ensure that each speaker simultaneously outputs audio signals with the same pitch.

A speaker sound effect automatic adjustment system, the system comprising a computer, a microphone and a database, wherein the computer is connected to the microphone, the database and a plurality of speakers whose sound effects are to be adjusted, wherein the data library stores the sound source file. The computer includes: an opening module, configured to select one of the plurality of speakers to be turned on; a playing module for playing a sound source file in the database, and outputting the audio source file from the opened speaker Audio signal, and recording the sound source file start playing time; recording module for recording the audio signal output by the speaker through the microphone, and recording the audio signal to start recording time; delay calculation module for calculating the audio signal to start recording The time difference between the time and the start time of the audio file; the pitch acquisition module is used to obtain the pitch of the recorded audio signal; and the adjustment module is used to test each speaker after all the speakers have been tested. The time difference and pitch obtained at the time adjust the delay and pitch of each corresponding speaker, so that each Yang Homophone simultaneously high output audio signal.

A method for automatically adjusting a speaker sound effect, using a computer and a microphone and a database connected to the computer to automatically adjust the sound effects of the plurality of speakers, wherein the database stores the sound source file, the method comprising the following steps: the opening step: from the plurality of speakers Select a speaker to be turned on; play step: play the sound source file in the database, output the audio signal of the sound source file from the opened speaker, and record the sound source file start playing time; recording step: recording the speaker through the microphone The audio signal outputted in the middle, and recording the audio signal to start recording time; the time difference calculation step: calculating the time difference between the start time of the audio signal and the start time of the audio file; the pitch acquisition step: obtaining the pitch of the recorded audio signal Repeat the above opening step, playing step, recording step, time difference calculation step and pitch acquisition step, continue to test the untested speaker, and obtain the corresponding time difference and pitch; and when all the speakers are tested, according to the test Speaker Each acquired time difference and adjust the pitch delay and pitch corresponding loudspeaker, each loudspeaker unison while high output audio signal.

Compared with the prior art, the speaker sound effect automatic adjustment system and method can automatically adjust the time and pitch of each speaker to play an audio signal, and ensure that each speaker simultaneously outputs an audio signal with the same pitch.

Referring to Figure 1, there is shown a system architecture diagram of a preferred embodiment of the speaker sound effect automatic adjustment system of the present invention. The speaker sound effect automatic adjustment system includes a computer 10, a microphone 30, and a database 40. The computer 10 is connected to a plurality of speakers 20 whose sound effects are to be adjusted, and the plurality of speakers 20 are combined to form a multimedia speaker that can be applied to a home theater. The microphone 30 is connected to the computer 10 for recording a sound source file played from the speaker 20. The database 40 is connected to the computer 10, and the database 40 is pre-stored with a sound source file, and the database 40 is further used for storing the audio file recorded by the microphone 30.

The computer 10 includes an opening module 110, a playing module 120, a recording module 130, a delay calculating module 140, a pitch acquiring module 150, a determining module 160, and an adjusting module 170.

The opening module 110 is configured to select one of the plurality of speakers 30 to be turned on.

The playing module 120 is configured to play the audio file in the database 40, output the audio signal of the audio file from the turned-on speaker 30, and record the start playing time. In the preferred embodiment, the audio file is a waveform audio file; in other embodiments, other formats, such as MIDI, MPI format, etc., may also be employed. Waveform audio files are also known as WAVE format files, ie files with .wav as the file name. The waveform audio file determines the quality of the sound by parameters such as sampling rate and sample value. Compared with other format audio files such as MIDI format files or MP3 format files, the waveform audio files can ensure good audio data integrity in audio recording.

The recording module 130 is configured to record an audio signal output from the speaker 30 through the microphone 30, and store the recorded audio signal in the database 40 as a recorded audio file, and record the audio signal to start recording time. In the preferred embodiment, the recorded audio file is a waveform audio file; in other embodiments, other formats, such as MIDI, MPI format, etc., may also be employed.

The delay calculation module 140 is configured to calculate a time difference between a start time of the audio signal and a start time of the audio file.

The pitch acquisition module 150 is configured to acquire the pitch of the recorded audio signal. The pitch acquisition module 150 first converts the recorded audio file from the time domain to the frequency domain through a fast Fourier transform (FFT), and then acquires the pitch of the recorded audio file in the frequency domain. Wherein, the time domain means that the audio signal is transformed with time, and the frequency domain means that the audio signal is transformed with the frequency transformation. The pitch acquired in the frequency domain is more accurate than the pitch acquired in the time domain.

The determining module 160 is configured to determine whether the speaker 30 is still not tested. If the speaker 30 is not tested, the open module 110, the play module 120, the recording module 130, the delay calculation module 140 and the pitch acquisition module 150 perform relevant tests on the speaker 30.

The adjustment module 170 is configured to adjust the delay and pitch of each corresponding speaker according to each time difference and pitch acquired when testing each speaker 30 after all the speakers 30 have been tested, thereby making each speaker At the same time, the audio signal is output at the same pitch.

Referring to FIG. 2, it is a flow chart of a preferred embodiment of the method for automatically adjusting the sound effect of the speaker of the present invention. First, in step S11, the opening module 110 selects one of the plurality of speakers 30 to be turned on.

In step S12, the playing module 120 plays the audio file in the database 40, outputs the audio signal of the audio file from the turned-on speaker 30, and records the start playing time.

In step S13, the recording module 130 records the audio signal output from the speaker 30 through the microphone 30, and stores the recorded audio signal in the database 40 as a recorded audio file, and records the audio signal to start recording time.

In step S14, the delay calculation module 140 calculates the time difference between the start time of the audio signal and the start time of the audio file.

In step S15, the pitch acquisition module 150 acquires the pitch of the recorded audio signal. The pitch acquisition module 150 first converts the recorded audio file from the time domain to the frequency domain through a fast Fourier transform (FFT), and then acquires the pitch of the recorded audio file in the frequency domain.

In step S16, the judging module 160 judges whether or not the speaker 30 is not tested. If the speaker 30 is not tested, the process returns to step S11 to continue testing the next speaker 30.

In step S17, if all the speakers 30 have been tested, the adjustment module 170 adjusts the delay and pitch of each corresponding speaker according to the time difference and pitch acquired when testing each speaker 30, so that each speaker simultaneously has the same pitch. The audio signal is output and the process ends.

computer. . . 10

speaker. . . 20

microphone. . . 30

database. . . 40

Open the module. . . 110

Play module. . . 120

Recording module. . . 130

Delay calculation module. . . 140

Pitch acquisition module. . . 150

Judging the module. . . 160

Adjust the module. . . 170

Choose to turn on a speaker. . . S11

Play the audio file, output the audio signal of the audio file from the turned-on speaker, and record the start time. . . S12

The audio signal outputted from the speaker is recorded through the microphone, and the recorded audio signal is stored in the database as a recorded audio file, and the audio signal is recorded to start recording time. . . S13

Calculate the time difference between the start of the recording of the audio signal and the start of the audio file. . . S14

Get the pitch of the recorded audio signal. . . S15

Are there still speakers not tested? . . . S16

Adjust the delay and pitch of each corresponding speaker according to the time difference and pitch obtained when testing each speaker, so that each speaker outputs the audio signal at the same pitch. . . S17

1 is a system architecture diagram of a preferred embodiment of the speaker sound effect automatic adjustment system of the present invention.

2 is a flow chart of a preferred embodiment of the method for automatically adjusting the sound effect of the speaker of the present invention.

Choose to turn on a speaker. . . S11

Play the audio file, output the audio signal of the audio file from the turned-on speaker, and record the start time. . . S12

The audio signal outputted from the speaker is recorded through the microphone, and the recorded audio signal is stored in the database as a recorded audio file, and the audio signal is recorded to start recording time. . . S13

Calculate the time difference between the start of the recording of the audio signal and the start of the audio file. . . S14

Get the pitch of the recorded audio signal. . . S15

Are there still speakers not tested? . . . S16

Adjust the delay and pitch of each corresponding speaker according to the time difference and pitch obtained when testing each speaker, so that each speaker outputs the audio signal at the same pitch. . . S17

Claims (4)

A speaker sound effect automatic adjustment system, the system comprising a computer, a microphone and a database, wherein the computer is connected to the microphone, the database and a plurality of speakers whose sound effects are to be adjusted, wherein the data library stores the sound source file. The computer includes: an opening module, configured to select one of the plurality of speakers to be turned on; a playing module, configured to play the audio file in the database, and output the audio file from the opened speaker. The audio signal, and recording the start time of the audio file; the recording module is configured to record the audio signal output by the speaker through the microphone, and record the audio signal to start recording time; the delay calculation module is used to calculate the audio signal The time difference between the recording time and the start time of the audio file; the pitch acquisition module is used to obtain the pitch of the recorded audio signal; and the adjustment module is used to test each of the speakers after all the tests are completed. The time difference and pitch obtained by the speaker adjust the delay and pitch of each corresponding speaker, so that each Speaker while homonym high output audio signal. The speaker sound effect automatic adjustment system of claim 1, wherein the recording module is further configured to store the recorded audio signal as a recorded audio file in a database. A method for automatically adjusting a speaker sound effect, using a computer and a microphone and a database connected to the computer to automatically adjust the sound effects of the plurality of speakers, wherein the database stores the sound source file, the method comprising the following steps: the opening step: from the plurality of speakers Select a speaker to be turned on; play step: play the sound source file in the database, output the audio signal of the sound source file from the opened speaker, and record the sound source file start playing time; recording step: recording the speaker through the microphone The audio signal outputted in the middle, and recording the audio signal to start recording time; the time difference calculation step: calculating the time difference between the start time of the audio signal and the start time of the audio file; the pitch acquisition step: obtaining the pitch of the recorded audio signal Repeat the above opening step, playing step, recording step, time difference calculation step and pitch acquisition step, continue to test the untested speaker, and obtain the corresponding time difference and pitch; and when all the speakers are tested, according to the test Speaker Each acquired time difference and adjust the pitch delay and pitch corresponding loudspeaker, each loudspeaker unison while high output audio signal. The method for automatically adjusting a speaker sound according to claim 3, wherein the recording step further comprises storing the recorded audio signal as a recorded audio file in a database.