16results about "Volume compression/expansion" patented technology

Presented is a method (100) for real-time processing an audio stream in an audio speaker arrangement comprising at least one audio speaker. The method (100) comprises receiving (110) an audio-stream and a playback volume associated with the audio-stream and determining (120) a playback sound pressure level of the audio speaker based on the playback volume and pre-stored acoustic transfer data. The pre- stored acoustic transfer data is associating the playback volume with the playback sound pressure level of the audio speaker. The method further comprises generating (130) a compensation filter based on amplitude compensation data associated with the determined playback sound pressure level and filtering (140) the audio-stream using the compensation filter and applying a gain factor to the audio stream generating a compensated audio-stream. The gain factor is configured such that a total audio power of the audio stream is preserved regardless of the compensation filter. The compensated audio stream is provided (150) to the audio speaker (21). Additionally, an audio speaker arrangement and a computer program product are presented.

To provide an audio compression method and device for suppressing distortion of an audio signal during reproduction and improving reproduction quality. [Solution] The audio compression method includes the steps of obtaining a first audio signal to be processed (an original audio signal to be reproduced), filtering the first audio signal with a frequency spectrum compensation filter based on a predetermined target frequency spectrum related to the distortion band of the audio reproduction device to obtain a second audio signal, processing the second audio signal with a predetermined dynamic range compressor (DRC) to obtain a compression coefficient, and outputting a compressed signal based on the compression coefficient.

The invention relates to the technical field of audio signal processing, in particular to an audio signal processing method and device, electronic equipment and a storage medium. The audio signal processing method comprises the following steps: firstly, receiving a currently input first audio signal, and when the amplitude of the first audio signal is determined to be greater than or equal to a first signal threshold value, firstly turning down a digital gain in the first audio signal to obtain a second audio signal, and then increasing an analog gain in the second audio signal to obtain a third audio signal; or, when it is determined that the amplitude of the first audio signal is smaller than the first signal threshold value, firstly increasing the digital gain in the first audio signal to obtain a fourth audio signal, and then reducing the analog gain in the fourth audio signal; in this way, the digital gain and the analog gain in the first audio signal can be dynamically adjusted according to the amplitude change condition of the input first audio signal, so that it is guaranteed that the quality of the processed audio signal is high, and the processed audio signal has a high signal-to-noise ratio and a wide signal dynamic range.

A signal processing method comprises comparing a first frequency domain representation of a sequence of power values for respective windows of source input samples of a source input signal with a second frequency domain representation of a sequence of power values for respective windows of target input samples of a target input signal so as to generate a frequency domain difference representation; inverse-frequency-transforming the frequency domain difference representation to generate a modification indication; and applying the modification indication to the source input samples to generate respective output samples of an output signal.

Provided is an electronic device comprising: a microphone; a memory for storing instructions; and one or more processors including processing circuitry. When executed individually or collectively by the one or more processors, the instructions instruct the electronic device to perform one or more operations. The one or more operations include: acquiring a volume adjustment model that indicates a target signal level with respect to a noise level; acquiring a first acoustic signal through the microphone of the electronic device; acquiring a second acoustic signal of a medium on the basis that the medium performs playback at a playback volume; adjusting the playback volume on the basis of the volume adjustment model, a first intensity of the first acoustic signal corresponding to the noise level and a second intensity of the second acoustic signal corresponding to the target signal level; and updating the volume adjustment model on the basis that the playback volume exceeds a first threshold time.

To provide an audio compression method and device for improving reproduction quality by suppressing an audio signal from being distorted during reproduction.SOLUTION: The audio compression method includes obtaining a to-be-processed first audio signal (a to-be-played original audio signal), filtering the first audio signal by using a frequency spectrum compensation filter based on a predetermined target frequency spectrum associated with a distortion band of an audio playback device to obtain a second audio signal, processing the second audio signal by using a predetermined dynamic range compressor (DRC) to obtain a compression coefficient, and outputting a compressed signal based on the compression coefficient.SELECTED DRAWING: Figure 6