Audio coding method, apparatus, computer readable storage medium and apparatus
An audio coding and audio frame technology, applied in the field of signal processing, can solve the problems of increasing computing and storage overhead, excessive consumption of computing and storage resources and network bandwidth resources, and increasing network transmission overhead, so as to alleviate computing and storage overhead and avoid computing and storage overhead , avoiding the effect of network transmission overhead
Active Publication Date: 2020-09-25
广州腾讯科技有限公司
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Problems solved by technology
For example, the determined sampling rate may be too high, and a high sampling rate will excessively consume computing storage resources and network bandwidth resources, because the higher the sampling rate, the greater the amount of data to be processed
For example, the amount of data to be processed at a sampling rate of 48kHz is three times larger than that at a sampling rate of 16kHz, which will greatly increase the calculation and storage overhead, and at the same time, the size of the code stream after audio encoding will also increase sharply, thereby greatly Increase network transmission overhead
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[0061] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0062] It can be understood that the terms "first", "second" and the like used in this application may be used to describe various concepts herein, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another.
[0063] Wherein, at least one refers to one or more than one. For example, at least one sampling rate may be any integer sampling rate greater than or equal to one, such as one sampling rate, two sampling rates, or three sampling rates. A plurality refers to two or more, for example, a plurality of sampling rates may be any integer number of sampling rates greater than or equal to two, such as two sampling rates or three sampling rates. Ea...
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The invention discloses an audio coding method and device, a computer readable storage medium and equipment, and belongs to the technical field of signal processing. The method comprises the followingsteps: acquiring an audio signal at a first sampling rate; converting the acquired audio signal from a time domain to a frequency domain, and acquiring a first power spectrum of each frequency pointin the frequency domain; acquiring a noise power spectrum estimation value and an auditory perception coefficient of each frequency point in the frequency domain; wherein the auditory perception coefficient is in positive correlation with the auditory loudness, the auditory loudness is used for describing the loudness degree of sound, and the auditory perception coefficient is used for describingthe auditory perception degree of human ears for sounds at different frequency points; determining a second sampling rate according to the first power spectrum, the noise power spectrum estimation value and the auditory perception coefficient of each frequency point in the frequency domain; and performing audio coding according to the second sampling rate. According to the method and the device, the sampling rate is adaptively and dynamically determined based on the auditory perception characteristics of the audio signal, so that the determined sampling rate is more adaptive to the characteristics of the audio signal, and audio coding can be effectively guided.
Description
technical field [0001] The present application relates to the technical field of signal processing, and in particular to an audio coding method, device, computer-readable storage medium and equipment. Background technique [0002] Audio coding refers to the redundant analysis and compression processing in the time domain and frequency domain of the original collected lossless audio signal, thereby reducing the voice transmission bandwidth and storage space while maintaining good voice quality. Wherein, the conventional input parameters of the audio encoder include but are not limited to: sampling rate, number of channels, encoding bit rate, and the like. Among these conventional input parameters, since the sampling rate has a crucial impact on the computing storage overhead and network transmission overhead, it is of great significance to choose an appropriate sampling rate to guide audio coding. [0003] In related technologies, the sampling rate of the audio encoder is se...
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IPC IPC(8): G10L19/00G10L19/16
CPCG10L19/0017G10L19/167
Inventor 梁俊斌
Owner 广州腾讯科技有限公司