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Loudspeaker sound field equalization automatic calibration method and device
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An automatic calibration and speaker technology, applied in the direction of electrical components, etc., can solve the problems of high cost, no solution proposed, poor precision, etc.
Active Publication Date: 2020-12-11
BEIJING THUNDERSTONE TECH CO LTD
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Manual tuning has many limitations, such as poor accuracy, long adjustment time, uneven level of tuners, high cost, etc.
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Embodiment 1
[0051] Such as Figure 1~3 The automatic calibration method for speaker sound field equalization is shown, including:
[0052] S1. Obtain initial parameters;
[0053] The initial parameters include:
[0054] The input channel configuration table is used to indicate whether the current channel is a normal channel or a low-frequency channel;
[0055] Automatic calibration start level STARTSPL, the output level required for automatic calibration needs to be manually set by the user according to the specific application situation;
[0056] Sampling rate Fs, that is, the sampling frequency of the audio signal ADC, is usually set to 44.1KHz or 48KHz, and is used to calculate the filter parameters of the characteristic curve extraction and the parameters of the calibration equalizer
[0057] The target characteristic curve DS is an array of 31 points, marked as DS1~DS31, and the sequence of center frequency points represented by it is 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 2...
Embodiment 2
[0111] Such as Figure 4 , Figure 5 The loudspeaker sound field equalization automatic calibration device 1 shown includes:
[0112] A parameter acquisition unit 11, configured to acquire initial parameters;
[0113] A mono-channel calibration module 12, configured to calibrate the channels of the equalization filter 2 one by one according to the initial parameters, and output a calibration result;
[0114] The initial parameters include:
[0115] The input channel configuration table is used to indicate whether the current channel is a normal channel or a low-frequency channel;
[0116] Automatic calibration start level STARTSPL, the output level required for automatic calibration needs to be manually set by the user according to the specific application situation;
[0117] Sampling rate Fs, that is, the sampling frequency of the audio signal ADC, is usually set to 44.1KHz or 48KHz, and is used to calculate the filter parameters of the characteristic curve extraction and...
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Abstract
The embodiment of the invention provides a loudspeakersound fieldequalization automatic calibration method. The method comprises the steps of S1, obtaining initial parameters; S2, calibrating soundchannels of equalization filters one by one according to the initial parameters; And S3, after all sound channels of the equalization filter are calibrated, carrying out overall sound channel calibration on the equalization filter, and outputting a calibration result. The system is suitable for application scenarios such as home KTV, movie theaters, stages and conference rooms, and can achieve theeffects of inhibiting room squeaking, detecting equipment faults, improving tone quality, saving labor cost, improving adjustment consistency and precision and reducing adjustment time. By setting different target characteristic curves, automatic fitting of the target characteristic curves is realized.
Description
technical field [0001] The invention relates to the technical field of audio signalprocessing, in particular to a method and device for automatic calibration of loudspeakersound field equalization. Background technique [0002] In KTV, concert hall and other application backgrounds, after the completion of new construction, the audio curve in the room needs to be adjusted, or after a period of operation in KTV or concert hall, the placement of furniture in the room and the aging of decoration materials will affect the The audio curve in the room has an effect. It is necessary to hire a professional tuner to adjust the audio equipment / speakers in various rooms of KTV or concert hall. [0003] Based on experience, the tuner adjusts the equalization curve through the effector at the best treble position. During the adjustment process, the tuner repeatedly compares and plays music to achieve the best tuning effect. Manual tuning has many limitations, such as poor accuracy, ...
Claims
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