CN102724605A - Virtual bass enhancement processing method - Google Patents
Virtual bass enhancement processing method Download PDFInfo
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- CN102724605A CN102724605A CN2012102249679A CN201210224967A CN102724605A CN 102724605 A CN102724605 A CN 102724605A CN 2012102249679 A CN2012102249679 A CN 2012102249679A CN 201210224967 A CN201210224967 A CN 201210224967A CN 102724605 A CN102724605 A CN 102724605A
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- 230000005236 sound signal Effects 0.000 claims abstract description 23
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- 238000007906 compression Methods 0.000 claims abstract description 11
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Abstract
The invention provides a virtual bass enhancement processing method. The method comprises the following steps: step 1, an audio signal is subject to frequency division processing, one audio signal obtains component which is higher than cut-off frequency of the loudspeaker through the high-pass filtering processing, and then is further subject to the delay processing to directly obtain the high-frequency signal, and the other audio signal is converted into a low-frequency signal through low-pass filtering process; step 2, the low-frequency signal is subjected to the dynamic range compression processing; step 3, the low-frequency signal which is subjected to the dynamic range compression processing is processed into a virtual bass signal; step 4, the high-frequency signal obtained in step 1 and the virtual bass signal obtained in step 3 both are extended audio signals with low frequency; and step 5, the audio signal synthesized in the step 4 is subjected to amplifier processing and then is output to the loudspeaker. According to the invention, the signal in the audio signal which is lower than the cut-off frequency of the loudspeaker is processed into the virtual bass signal which can be restored by the loudspeaker, and is synthesized with the signal which is higher than the cut-off frequency of the loudspeaker to form the extended audio signal with low frequency, and then the extended audio signal with low frequency is output to the loudspeaker after being subjected to the amplifier processing, so that restoring the low-frequency sound which is lower than the cut-off frequency of the loudspeaker is achieved and the sound effect is improved.
Description
Technical field
The present invention relates to audio signal processing technique, specifically be meant a kind of virtual bass enhancement process method.
Background technology
At present, most of loud speakers are the traditional moving-coil structure of this A Yong still, owing to be limited by volume, the low-frequency cut-off frequency of miniature loudspeaker can raise, and also is that the less mature stage of volume can't reduce the lower frequency sounds below the cut-off frequency.Traditional method is to use equalizer to improve the low frequency output function, but audio signal at this moment produces severe distortion, and very big to the infringement of loud speaker.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point of the prior art; A kind of virtual bass enhancement process method is provided; The present invention is exported by loud speaker after handling through power amplifier through the signal that is lower than in the audio signal below the loud speaker cut-off frequency is carried out and can then be synthesized the audio signal that the back forms the low frequency expansion with the signal that is higher than the loud speaker cut-off frequency by the virtual bass signal of loud speaker reduction; Thereby realized the lower frequency sounds below the reduction cut-off frequency, improved audio.
The object of the invention realizes through following technical scheme: virtual bass enhancement process method, and step is following:
S1 handles audio signal through frequency-division section, wherein one the tunnel handle the composition that obtains being higher than the loud speaker cut-off frequency through high-pass filtering, after delay process, directly obtains high-frequency signal again; Another road becomes low frequency signal through low-pass filtering treatment;
S2 sets up the mapping relations of the dynamic range compression processing of low frequency signal as required, according to these mapping relations said low frequency signal is carried out dynamic range compression and handles;
Low frequency signal after S3 handles dynamic range compression is processed into can be by the virtual bass signal of loud speaker reduction;
The virtual bass signal that high-frequency signal that S4 step S1 obtains and step S3 obtain carries out the audio signal for the low frequency expansion;
The S5 audio signal that step S4 is synthetic carries out exporting to loud speaker after power amplifier is handled.
The present invention is following than the advantage and the beneficial effect of prior art: the present invention is through can be by the virtual bass signal of loud speaker reduction with being lower than in the audio signal that signal below the loud speaker cut-off frequency carries out; Then synthesize the audio signal that the back forms the low frequency expansion with the signal that is higher than the loud speaker cut-off frequency; After handling, export by loud speaker through power amplifier; Thereby realized the lower frequency sounds below the reduction cut-off frequency, improved audio.
Description of drawings
Fig. 1 is the flow chart of virtual bass enhancement process method.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but execution mode of the present invention is not limited thereto.
Embodiment
As shown in Figure 1, virtual bass enhancement process method, step is following:
S1 handles audio signal through frequency-division section, wherein one the tunnel handle the composition that obtains being higher than the loud speaker cut-off frequency through high-pass filtering, after delay process, directly obtains high-frequency signal again; Another road becomes low frequency signal through low-pass filtering treatment;
S2 sets up the mapping relations of the dynamic range compression processing of low frequency signal as required, according to these mapping relations said low frequency signal is carried out dynamic range compression and handles;
Low frequency signal after S3 handles dynamic range compression is processed into can be by the virtual bass signal of loud speaker reduction;
The virtual bass signal that high-frequency signal that S4 step S1 obtains and step S3 obtain carries out the audio signal for the low frequency expansion;
The S5 audio signal that step S4 is synthetic carries out exporting to loud speaker after power amplifier is handled.
The foregoing description is a preferred implementation of the present invention; But execution mode of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (1)
1. virtual bass enhancement process method is characterized in that step is following:
S1 handles audio signal through frequency-division section, wherein one the tunnel handle the composition that obtains being higher than the loud speaker cut-off frequency through high-pass filtering, after delay process, directly obtains high-frequency signal again; Another road becomes low frequency signal through low-pass filtering treatment;
S2 sets up the mapping relations of the dynamic range compression processing of low frequency signal as required, according to these mapping relations said low frequency signal is carried out dynamic range compression and handles;
Low frequency signal after S3 handles dynamic range compression is processed into can be by the virtual bass signal of loud speaker reduction;
The virtual bass signal that high-frequency signal that S4 step S1 obtains and step S3 obtain synthesizes the audio signal of low frequency expansion;
The S5 audio signal that step S4 is synthetic carries out exporting to loud speaker after power amplifier is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012102249679A CN102724605A (en) | 2012-06-29 | 2012-06-29 | Virtual bass enhancement processing method |
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| CN2012102249679A CN102724605A (en) | 2012-06-29 | 2012-06-29 | Virtual bass enhancement processing method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104936088A (en) * | 2015-04-21 | 2015-09-23 | 上海大学 | A Hybrid Virtual Bass Enhancement Processing Method |
| CN105246017A (en) * | 2015-10-26 | 2016-01-13 | 东莞酷派软件技术有限公司 | An audio digital signal processor and system |
| CN108781330A (en) * | 2016-05-25 | 2018-11-09 | 华为技术有限公司 | Audio signal processing stage, audio signal processing device and audio signal processing method |
| CN109996151A (en) * | 2019-04-10 | 2019-07-09 | 上海大学 | One kind mixing virtual bass boosting method based on the separation of wink steady-state signal |
| CN112511941A (en) * | 2020-12-01 | 2021-03-16 | 恒玄科技(上海)股份有限公司 | Audio output method and system and earphone |
| CN112637741A (en) * | 2020-12-30 | 2021-04-09 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
| US11477601B2 (en) | 2018-10-16 | 2022-10-18 | Dolby Laboratories Licensing Corporation | Methods and devices for bass management |
| CN115346544A (en) * | 2021-05-14 | 2022-11-15 | 广州视源电子科技股份有限公司 | Audio signal processing method, apparatus, storage medium, and program product |
| CN115442709A (en) * | 2022-07-29 | 2022-12-06 | 荣耀终端有限公司 | Audio processing method, virtual bass enhancement system, device and storage medium |
| CN116072133A (en) * | 2021-10-29 | 2023-05-05 | 上海艾为电子技术股份有限公司 | Bass enhancement method, device and audio output equipment |
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| CN101155440A (en) * | 2007-09-17 | 2008-04-02 | 昊迪移通(北京)技术有限公司 | Three-dimensional around sound effect technology aiming at double-track audio signal |
| CN101964190A (en) * | 2009-07-24 | 2011-02-02 | 敦泰科技(深圳)有限公司 | Method and device for restoring signal under speaker cut-off frequency to original sound |
| US20120008798A1 (en) * | 2010-07-12 | 2012-01-12 | Creative Technology Ltd | Method and Apparatus For Stereo Enhancement Of An Audio System |
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2012
- 2012-06-29 CN CN2012102249679A patent/CN102724605A/en active Pending
Patent Citations (3)
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| CN101155440A (en) * | 2007-09-17 | 2008-04-02 | 昊迪移通(北京)技术有限公司 | Three-dimensional around sound effect technology aiming at double-track audio signal |
| CN101964190A (en) * | 2009-07-24 | 2011-02-02 | 敦泰科技(深圳)有限公司 | Method and device for restoring signal under speaker cut-off frequency to original sound |
| US20120008798A1 (en) * | 2010-07-12 | 2012-01-12 | Creative Technology Ltd | Method and Apparatus For Stereo Enhancement Of An Audio System |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104936088A (en) * | 2015-04-21 | 2015-09-23 | 上海大学 | A Hybrid Virtual Bass Enhancement Processing Method |
| CN105246017A (en) * | 2015-10-26 | 2016-01-13 | 东莞酷派软件技术有限公司 | An audio digital signal processor and system |
| CN105246017B (en) * | 2015-10-26 | 2019-08-02 | 东莞酷派软件技术有限公司 | A kind of audio digital signal processor and system |
| CN108781330B (en) * | 2016-05-25 | 2020-04-28 | 华为技术有限公司 | Audio signal processing stage, audio signal processing device and audio signal processing method |
| CN108781330A (en) * | 2016-05-25 | 2018-11-09 | 华为技术有限公司 | Audio signal processing stage, audio signal processing device and audio signal processing method |
| US10433056B2 (en) | 2016-05-25 | 2019-10-01 | Huawei Technologies Co., Ltd. | Audio signal processing stage, audio signal processing apparatus, audio signal processing method, and computer-readable storage medium |
| US11477601B2 (en) | 2018-10-16 | 2022-10-18 | Dolby Laboratories Licensing Corporation | Methods and devices for bass management |
| CN109996151A (en) * | 2019-04-10 | 2019-07-09 | 上海大学 | One kind mixing virtual bass boosting method based on the separation of wink steady-state signal |
| CN112511941A (en) * | 2020-12-01 | 2021-03-16 | 恒玄科技(上海)股份有限公司 | Audio output method and system and earphone |
| CN112511941B (en) * | 2020-12-01 | 2023-06-13 | 恒玄科技(上海)股份有限公司 | Audio output method and system and earphone |
| CN112637741A (en) * | 2020-12-30 | 2021-04-09 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
| CN112637741B (en) * | 2020-12-30 | 2023-03-10 | 广州酷狗计算机科技有限公司 | Audio signal processing method, device, chip, electronic equipment and storage medium |
| CN115346544A (en) * | 2021-05-14 | 2022-11-15 | 广州视源电子科技股份有限公司 | Audio signal processing method, apparatus, storage medium, and program product |
| CN116072133A (en) * | 2021-10-29 | 2023-05-05 | 上海艾为电子技术股份有限公司 | Bass enhancement method, device and audio output equipment |
| CN115442709A (en) * | 2022-07-29 | 2022-12-06 | 荣耀终端有限公司 | Audio processing method, virtual bass enhancement system, device and storage medium |
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Application publication date: 20121010 |