Audio coding method and coding and decoding equipment
An audio coding and coding technology, applied in the field of a method of audio coding and coding and decoding equipment, can solve the problems of reducing the coding bit rate of the encoder, reducing the coding bit rate, etc.
Pending Publication Date: 2022-01-21
HUAWEI TECH CO LTD
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[0067] The technical solution in this application will be described below with reference to the accompanying drawings.
[0068] The embodiments of the present application may be applied to stereo codecs in communication modules of terminal equipment, wireless access network equipment, and core network equipment.
[0069] An application scenario of the embodiment of the present application is introduced below, figure 1 A schematic diagram of an application scenario 100 of the embodiment of the present application is shown. figure 1 What is shown is a schematic diagram of the system architecture applied on the terminal device side according to the embodiment of the present application. Such as figure 1 as shown, figure 1 includes a first terminal device 110 , a second terminal device 120 , a wireless or wired network communication device 130 and a wireless or wired network communication device 140 . Wherein, the first terminal device 110 and the second terminal device 120 ma...
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The invention provides an audio coding method and coding equipment, which can reduce coding redundancy and improve coding efficiency. The method comprises the following steps: acquiring a current frame of an audio signal, wherein the current frame of the audio signal comprises a high-frequency band signal and a low-frequency band signal; performing first coding according to the high-frequency band signal and the low-frequency band signal to obtain a first coding parameter of the current frame; performing second coding according to the high-frequency band signal, obtaining a second coding parameter of the current frame, wherein the second coding parameter is used for representing information of tone components of the high-frequency band signal; adjusting the frequency spectrum of the high-frequency band signal after frequency band expansion according to the information of the tone component of the high-frequency band signal so as to obtain the frequency spectrum of the adjusted high-frequency band signal; performing third coding according to the frequency spectrum of the adjusted high-frequency band signal to obtain a third coding parameter; and performing code stream multiplexing on the first coding parameter, the second coding parameter and the third coding parameter to obtain a coding code stream of the current frame.
Description
technical field [0001] The present application relates to the media field, and more specifically, relates to an audio coding method and a codec device. Background technique [0002] In order to reduce the coding bit rate, audio codecs often further use the correlation between signals in different frequency bands for coding. The high-band signal is encoded with fewer bits, thereby reducing the encoding bit rate of the encoder. However, in real audio signals, there are often some tonal components in the spectrum of the high frequency band that are not similar to the spectrum of the low frequency band. Due to the limitation of the number of coding bits, when encoding the tonal component information in the high-frequency band signal, how to determine the tonal component that needs to be coded, and how to efficiently use the limited number of coding bits to obtain a better coding effect has become an issue that affects the coding quality. One of the key technologies. Contents...
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Login to View More IPC IPC(8): G10L19/008G10L19/02G10L19/16
CPCG10L19/008G10L19/02G10L19/16G10L19/0204G10L21/038
Inventor 夏丙寅李佳蔚王喆
Owner HUAWEI TECH CO LTD