Method and system of processing multichannel audio signals

An audio signal, multi-channel technology, used in stereo systems, quasi-stereo systems, electrical components, etc., can solve the problems of sudden volume drop and loss of information

Active Publication Date: 2013-07-03
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0005] The applicant conducted in-depth research on the existing audio processing methods and found that the method of extracting only one channel of the audio signal for playback will lose a lot of information when the content of the two channels is quite different
However, the method of simply superimposing two or more channels and then taking the average value will cause a sudden drop in volume when the two channels have mutual inversion characteristics.

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  • Method and system of processing multichannel audio signals
  • Method and system of processing multichannel audio signals
  • Method and system of processing multichannel audio signals

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Embodiment Construction

[0064] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0065] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0066] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0067] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

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Abstract

The invention discloses a method and a system of processing multichannel audio signals. The method comprises dividing the audio signals of at least two sound channels of the multichannel audio signals into a plurality of frames; acquiring target mixed factors of a current frame based on the audio signals of at least two sound channels of the current processing frame, wherein the target mixed factors enable a sound mixing state function indicating sound mixing effects to acquire a maximum value; acquiring a mixing weight coefficient based on the target mixed factors of the current frame; and mixing the audio signals of at least two sound channels of the current frame at single channel audio signals by using the mixing weight coefficient. By adopting the method of processing the multichannel audio signals, the multichannel audio signals are mixed as the single channel audio signals, the acquired single channel audio signals have good sound mixing effects, and the phenomena that information is seriously lost or sound volume drops sharply and the like are avoided.

Description

technical field [0001] The invention relates to the field of audio signal processing, in particular to the field of processing multi-channel audio signals. Background technique [0002] Currently, a large number of binaural or multi-channel audio materials exist. Among them, audio data with two channels, such as stereophonic music, is currently the most widely used audio format. This includes traditional CD records, as well as compressed music streams including MP3, AAC, OGG, etc. Binaural or stereo still occupies a very high proportion with its sufficient audio quality and spatial expression. [0003] However, some small mobile devices are often equipped with only one speaker due to the limitation of device space or manufacturing cost. These mobile devices configured with only one speaker can be mobile phones, personal digital assistants (PDA, Personal Digital Assistant), mobile Internet devices (MID, Mobile Internet Devices), tablet computers or small notebook computers...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S5/00
Inventor 吴晟林福辉李昙张本好徐晶明
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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