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Audio encoding and decoding method and related products

An audio coding and correlation technology, applied in the field of audio coding and decoding, which can solve the problems of lack of energy, low signal energy, and degradation of coding quality.

Active Publication Date: 2019-06-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors of the present application have found through research and practice that when using traditional time-domain stereo coding techniques, sometimes the energy of the main signal is extremely small or even lacks energy, which leads to a decline in the final coding quality

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  • Audio encoding and decoding method and related products
  • Audio encoding and decoding method and related products
  • Audio encoding and decoding method and related products

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Embodiment Construction

[0264] Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

[0265] The terms "comprising" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, or product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or optionally further include For other steps or units inherent in these processes, methods, products or apparatuses. In addition, terms such as "first", "second", "third" and "fourth" are used to distinguish different objects, rather than to describe a specific order.

[0266] It should be noted that due to the time-domain scenarios targeted by the solutions in the embodiments of the present application, the time-domain signal may be referred...

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Abstract

The embodiment of the invention discloses an audio encoding and decoding method and related products. The audio encoding and decoding method comprises the steps that a sound track combination scheme of a current frame is determined; according to a down-mixing mode of a previous frame and the sound track combination scheme of the current frame, an encoding mode of the current frame is determined; according to the encoding mode of the current frame, time domain down-mixing processing is carried out on left and right sound track signals of the current frame to obtain main and secondary sound track signals of the current frame; the obtained main and secondary sound track signals of the current frame are encoded. The audio encoding and decoding method and the related products are conductive toimproving the encoding quality.

Description

technical field [0001] This application relates to the technical field of audio codec, in particular to an audio codec method and related products. Background technique [0002] As the quality of life improves, people's demand for high-quality audio continues to increase. Compared with monophonic audio, stereo audio has a sense of orientation and distribution of each sound source, which can improve the clarity, intelligibility and presence of information, so it is favored by people. [0003] Parametric stereo codec technology is a common stereo codec technology for compressing multi-channel signals by converting stereo signals into mono signal and spatial perception parameters. However, since the parametric stereo codec technology usually needs to extract spatial perception parameters in the frequency domain, time-frequency transformation is required, which makes the delay of the entire codec relatively large. Therefore, the time-domain stereo coding technology is a better...

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Application Information

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IPC IPC(8): G10L19/008
CPCG10L19/008G10L19/22H04S3/008H04S2400/03H04S1/007
Inventor 李海婷王宾苗磊
Owner HUAWEI TECH CO LTD