CN114040317A - Sound channel compensation method and device, electronic equipment and storage medium - Google Patents
Sound channel compensation method and device, electronic equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
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- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
The application discloses sound channel compensation method and device of sound, electronic equipment and storage medium, relate to the technical field of vehicles, acquire the sound signal of the sound channel to be processed in the sound source, after copying the sound signal and obtaining the first sound signal and the second sound signal, the loudspeaker that the sound channel to be processed corresponds does not have the low frequency signal playing ability, acquire the low frequency signal in the first sound signal, and confirm the target sound mixing channel that the first sound signal corresponds, the target sound mixing channel is the sound channel that has the low frequency signal playing ability, mix the sound of the first sound signal and the original sound signal of the target sound mixing channel, input the second sound signal into the sound channel to be processed. The low-frequency expressive force of the sound channels with narrow frequency width is improved, so that each sound channel can be output through the full frequency range of the loudspeaker, and the auditory perception of playing multi-channel sound tracks in the vehicle cabin is greatly improved.
Description
Technical Field
The present disclosure relates to the field of vehicle technologies, and in particular, to a method and an apparatus for compensating a sound channel of a sound device, an electronic device, and a storage medium.
Background
With more and more families having cars, automobiles are becoming a mobile infotainment platform, and users have higher and higher requirements for vehicle-mounted sound equipment.
With the increasing demand of users for car audio, decoded multichannel soundtrack content, such as dolby, digital music mode DTS, etc., is becoming mainstream. Such soundtracks were originally designed for use in home theaters, each channel containing full-band content information. Taking the DTS as an example, the central speaker, the ceiling speaker and the surround speaker are limited by physical conditions due to the limitation of a vehicle speaker system, and the speaker is too small in size, so that full-band content playing cannot be satisfied, and a low-frequency part is lost, thereby reducing auditory perception of a user.
Disclosure of Invention
The disclosure provides a sound channel compensation method and device for a sound system, an electronic device and a storage medium.
According to an aspect of the present disclosure, there is provided a method of channel compensation of a sound, including:
acquiring a sound signal of a sound channel to be processed in a sound source, and copying the sound signal to obtain a first path of sound signal and a second path of sound signal, wherein the sound channel to be processed is a sound channel of a low-frequency signal which cannot be played by a loudspeaker;
acquiring the low-frequency signal in the first path of sound signal, and determining a target sound mixing channel corresponding to the first path of sound signal, wherein the target sound mixing channel is a channel capable of playing a low-frequency signal of a sound source;
mixing the first path of sound signal with an original sound signal of the target sound mixing channel, and inputting the target sound mixing channel; and
and inputting the second path of sound signal into the sound channel to be processed.
Before mixing the first sound signal with the original sound signal of the target mixed sound channel, the method further includes:
optionally, the in-ear delay and/or the volume of the low-frequency signal in the first sound signal is adjusted according to the target mixed sound channel.
Optionally, adjusting the in-ear delay and/or the volume of the low-frequency signal in the first sound signal according to the target mixed sound channel includes:
acquiring a reference in-ear delay of the low-frequency signal of the target sound mixing channel, and adjusting the in-ear delay of the low-frequency signal of the channel to be processed to the reference in-ear delay; and/or the presence of a gas in the gas,
and acquiring the reference volume of the low-frequency signal of the target sound mixing channel, and adjusting the volume of the low-frequency signal of the channel to be processed to the reference volume.
Optionally, determining the target mixed sound channel corresponding to the first sound signal includes:
if the channel to be processed is a middle channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the middle channel is a front left door bass channel and a front right door bass channel;
if the channel to be processed is a left back surround channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the left back surround channel is a left back door bass channel;
if the sound channel to be processed is a right back surround sound channel, determining that a target sound mixing channel corresponding to a first sound signal of the right back surround sound channel is a right back door bass sound channel
If the channel to be processed is a front left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front left 3D channel is a front left door bass channel;
if the channel to be processed is a front right 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front right 3D channel is a front right bass channel;
if the channel to be processed is a rear left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the rear left 3D channel is a rear left door bass channel; and
and if the channel to be processed is a rear right 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the rear right 3D channel is a rear right door bass channel.
Optionally, the low-frequency signal in the first sound signal of the center channel is 40Hz to 199 Hz;
the low frequency signal in the first sound signal of the left surround channel and the right surround channel is 40Hz-199 Hz;
the low-frequency signals in the first sound signals of the left front 3D sound channel and the right front 3D sound channel are 40Hz-299 Hz; and
and the low-frequency signals in the first sound signals of the left rear 3D sound channel and the right rear 3D sound channel are 40Hz-299 Hz.
Optionally, the channel to be processed is determined by:
acquiring the required bandwidth of a preset sound channel;
acquiring the frequency width which can be played by a loudspeaker corresponding to a preset sound channel as the frequency width of the loudspeaker;
and if the required frequency width is not in the range of the frequency width of the loudspeaker, determining that the loudspeaker corresponding to the preset sound channel does not have the low-frequency signal playing capability, and determining the preset sound channel as the sound channel to be processed.
Optionally, obtaining the sound signal of the channel to be processed from the sound source includes:
and after confirming that the volume of the sound source is greater than a preset volume threshold, carrying out clipping treatment on the part of which the volume is greater than the preset volume threshold so as to obtain the sound signal.
According to another aspect of the present disclosure, there is provided an acoustic channel compensation apparatus for a sound, including:
the device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring a sound signal of a channel to be processed from a sound source and copying the sound signal to obtain a first channel of sound signal and a second channel of sound signal, and a loudspeaker corresponding to the channel to be processed does not have low-frequency signal playing capability;
the second acquisition unit is used for acquiring the low-frequency signal in the first path of sound signal;
a determining unit, configured to determine a target mixed sound channel corresponding to the first channel of sound signal, where the target mixed sound channel is a sound channel with the low-frequency signal playing capability;
the adjusting unit is used for adjusting the in-ear delay and/or the volume of the low-frequency signal in the first sound signal according to the target mixed sound channel;
the sound mixing unit is used for mixing the first path of sound signal adjusted by the adjusting unit with an original sound signal of the target sound mixing channel and inputting the target sound mixing channel; and
and the input unit is used for inputting the second path of sound signal into the sound channel to be processed.
Optionally, the apparatus further comprises:
and the adjusting unit is used for adjusting the in-ear delay and/or the volume of the low-frequency signal according to the target sound mixing channel before the sound mixing unit mixes the first sound signal with the original sound signal of the target sound mixing channel.
Optionally, the adjusting unit includes:
a first obtaining module, configured to obtain a reference in-ear delay of the low-frequency signal of the target audio mixing channel; and
a first adjusting module, configured to adjust an in-ear delay of the low-frequency signal of the to-be-processed sound channel to the reference in-ear delay; and/or
A second obtaining module, configured to obtain a reference volume of the low-frequency signal of the target mixed sound channel;
and the second adjusting module is used for adjusting the volume of the low-frequency signal of the sound channel to be processed into the reference volume.
Optionally, the determining unit is further configured to:
if the channel to be processed is a middle channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the middle channel is a front left door bass channel and a front right door bass channel;
if the channel to be processed is a left back surround channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the left back surround channel is a left back door bass channel;
if the channel to be processed is a right back surround channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the right back surround channel is a right back door bass channel;
if the channel to be processed is a front left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front left 3D channel is a front left door bass channel;
if the channel to be processed is a front right 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front right 3D channel is a front right bass channel;
if the channel to be processed is a rear left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the rear left 3D channel is a rear left door bass channel; and
and if the channel to be processed is a rear right 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the rear right 3D channel is a rear right door bass channel.
Optionally, the low-frequency signal in the first sound signal of the center channel is 40Hz to 199 Hz;
the low frequency signal in the first sound signal of the left surround channel and the right surround channel is 40Hz-199 Hz;
the low-frequency signals in the first sound signals of the left front 3D sound channel and the right front 3D sound channel are 40Hz-299 Hz; and
and the low-frequency signals in the first sound signals of the left rear 3D sound channel and the right rear 3D sound channel are 40Hz-299 Hz.
Optionally, the apparatus further comprises:
a third obtaining unit, configured to obtain a required bandwidth of the preset channel;
the fourth acquisition unit is used for acquiring the bandwidth which can be played by the loudspeaker corresponding to the preset sound channel and taking the bandwidth as the bandwidth of the loudspeaker;
and the determining unit is used for determining that the loudspeaker corresponding to the preset sound channel does not have the low-frequency signal playing capability when the required frequency width is not in the range of the loudspeaker frequency width, and determining the preset sound channel as the sound channel to be processed.
Optionally, the first obtaining unit is further configured to perform clipping processing on a portion of the sound source with a volume greater than a preset volume threshold after confirming that the volume of the sound source is greater than the preset volume threshold, so as to obtain the sound signal.
According to another aspect of the present disclosure, there is provided an electronic device including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the preceding aspect.
According to another aspect of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of the preceding aspect.
According to another aspect of the present disclosure, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the method according to the preceding aspect.
The method and the device for compensating the sound channel of the sound equipment, the electronic equipment and the storage medium provided by the disclosure are used for obtaining the sound signal of the sound channel to be processed of the sound source, copying the sound signal to obtain a first sound signal and a second sound signal, enabling a loudspeaker corresponding to the sound channel to be processed not to have low-frequency signal playing capability, obtaining the low-frequency signal in the first sound signal, determining a target sound mixing channel corresponding to the first sound signal, enabling the target sound mixing channel to be the sound channel with the low-frequency signal playing capability, mixing the first sound signal and an original sound signal of the target sound mixing channel, inputting the target sound mixing channel, and inputting the second sound signal into the sound channel to be processed. According to the embodiment of the application, the low-frequency expressive force of the sound channel with the narrow bandwidth is improved, each sound signal can be output through the full frequency band of the loudspeaker, and the auditory perception of playing multi-channel sound tracks in a vehicle cabin is greatly improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present application, nor do they limit the scope of the present application. Other features of the present application will become apparent from the following description.
Drawings
The drawings are included to provide a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
fig. 1 is a flowchart illustrating a method for compensating a sound channel of an audio device according to an embodiment of the disclosure;
fig. 2 is a schematic diagram illustrating a processing procedure of channel compensation provided by an embodiment of the present application;
FIG. 3 is a schematic diagram of a channel bass compensation signal chain according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an acoustic channel compensation apparatus for an audio device according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another acoustic channel compensation apparatus according to an embodiment of the present disclosure;
fig. 6 is a schematic block diagram of an example electronic device 600 provided by embodiments of the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of the embodiments of the disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
A method, an apparatus, an electronic device, and a storage medium for channel compensation of sound of the embodiments of the present disclosure are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a method for compensating a sound channel according to an embodiment of the disclosure.
As shown in fig. 1, the method comprises the following steps:
101. the method comprises the steps of obtaining sound signals of a sound channel to be processed in a sound source, copying the sound signals to obtain a first path of sound signals and a second path of sound signals, wherein a loudspeaker corresponding to the sound channel to be processed does not have the low-frequency signal playing capacity.
In the present disclosure, the channel allocation after decoding of the sound source encoded by the techniques such as dolby and DTS is fixed, and in the present application, the following embodiment 7.1.4 channels are taken as an example, and the order of 12 channels is 1 and left channel; 2. a right channel; 3. a center channel; 4. a bass sound; 5. a left surround channel; 6. a right surround channel; 7. a left rear surround channel; 8. a right back surround channel; 9. a left front 3D channel; 10. a right front 3D channel; 11. left rear 3D channel; 12. left rear 3D channel.
For clarity of the embodiment, as shown in table 1, table 1 shows the bandwidth required by the decoder for each channel and the achievable bandwidth for each channel of the car stereo:
TABLE 1
As can be seen from table 1, due to the limitation of the space disposed in the vehicle, the large-sized speakers cannot be selected for the center speaker, the left rear surround speaker, the right rear surround speaker and the ceiling speaker, so that full-band playback cannot be satisfied, and the playback effect of the audio system is seriously affected; in order not to affect the overall auditory effect of the vehicle, a technique for compensating for low frequencies between channels is required.
The method provided by the embodiment of the application aims at the sound channel which cannot play the low-frequency signal of the sound source, and the sound channel which can play the low-frequency signal is not compensated but played by the original sound channel output.
The audio channels to be processed according to the embodiment of the present application include all audio channels whose car audio system bandwidth shown in table 1 cannot meet the bandwidth required by the decoder, and include: the sound system comprises a middle sound channel, a left back surround sound channel, a right back surround sound channel, a left front 3D sound channel, a right front 3D sound channel, a left back 3D sound channel and a right back 3D sound channel.
The method comprises the steps of obtaining a sound signal of a sound channel to be processed, and then fully copying the sound signal, wherein the sound signal is divided into two paths, namely a first path of sound signal and a second path of sound signal, and the low-frequency signal of any one path of sound signal can be processed to ensure that the full-frequency signal can be played, so that the auditory experience of a user of the vehicle-mounted sound system is improved.
It should be noted that, the first and second descriptions in the embodiments of the present application are only for distinguishing different sound signals, and do not include other meanings, such as priority, signal length, and the like.
102. And acquiring the low-frequency signal in the first path of sound signal, and determining a target sound mixing channel corresponding to the first path of sound signal, wherein the target sound mixing channel is a channel with the low-frequency signal playing capability.
For clarity of the embodiment, the low frequency signal is different from the channel, please refer to table 1, wherein the low frequency signal is 40Hz to 199Hz for the center channel, and 40Hz to 299Hz for the front left 3D channel. From the implementation point of view, after passing through a Low Pass Filter (LPF), the first path of sound signal is intercepted according to the "vehicle audio system bandwidth" shown in table 1 to obtain a Low frequency signal to be processed, so as to perform audio mixing processing on the intercepted Low frequency signal.
The premise of performing the sound mixing processing is to determine a sound channel capable of playing a low-frequency signal of a sound source as a target sound mixing channel so as to achieve the purpose of playing the full frequency. In theory, when a target mixed sound channel is confirmed, any channel capable of playing a low-frequency signal of a sound source in a vehicle can be selected as a target mixed sound channel, but due to the left-right symmetry of human ears, in order to not affect the in-ear time of audio, when the target mixed sound channel is determined, a channel which is closest to a channel to be processed and capable of playing the low-frequency signal of the sound source needs to be selected as the target mixed sound channel.
103. And mixing the first path of sound signal with the original sound signal of the target sound mixing channel, and inputting the target sound mixing channel.
In the embodiment of the present invention, the mixing may be performed based on a Mixer, and in fact, the mixing may be performed by any method in the related art, and the mixing means is not limited in the embodiment.
104. And inputting the second path of sound signal into the sound channel to be processed.
The sound channel compensation method for the sound equipment, provided by the embodiment of the application, includes the steps of obtaining sound signals of sound sources to be processed, copying the sound signals to obtain a first path of sound signals and a second path of sound signals, obtaining low-frequency signals in the first path of sound signals, determining a target sound mixing channel corresponding to the first path of sound signals, mixing the first path of sound signals and original sound signals of the target sound mixing channel to input the target sound mixing channel, and inputting the second path of sound signals into the to-be-processed sound channels, wherein the target sound mixing channel is a sound channel with the low-frequency signal playing capability. According to the embodiment of the application, the low-frequency expressive force of the sound channel with the narrow bandwidth is improved, each sound signal can be output through the full frequency band of the loudspeaker, and the auditory perception of playing multi-channel sound tracks in a vehicle cabin is greatly improved.
As an extension to the above embodiment, before the step 103 performs mixing the first sound signal with the original sound signal of the target mixed sound channel, the in-ear delay and/or volume of the low frequency signal in the first sound signal is adjusted according to the target mixed sound channel, and the purpose of adjusting the first sound signal according to the target mixed sound is to let the user view the audio from the channel to be processed from the sense of hearing, so as to improve the hearing feeling of playing a multi-sound track. If the adjustment operation is not performed, although full-frequency playback can be achieved, there may be a case where noise occurs or the volume abruptly changes.
As a first possible implementation manner, the adjusting the in-ear delay of the low-frequency signal in the first sound signal according to the target mixed sound channel includes: firstly, obtaining a reference in-ear delay of the low-frequency signal of the target sound mixing channel, and then adjusting the in-ear delay of the low-frequency signal of the channel to be processed to the reference in-ear delay. Considering the application scenario that a driver and a passenger may ride in a vehicle at the same time, the determination of the in-ear delay is mainly based on the arrival of sound at the ears of the driver.
As a second achievable method, when adjusting the volume of the low-frequency signal in the first sound signal according to the target mixed sound channel, the method specifically includes: and acquiring the reference volume of the low-frequency signal of the target sound mixing channel, and adjusting the volume of the low-frequency signal of the channel to be processed to the reference volume. When the volume is adjusted according to the reference volume, the gain processing is adopted.
Based on the two possible implementation manners, a manner of adjusting both (in-ear delay/volume) independently or simultaneously may be adopted, so that the method of compensating the sound channel is more flexible.
For better understanding, as shown in fig. 2, fig. 2 is a schematic diagram illustrating a processing procedure of channel compensation provided in an embodiment of the present application, where LPF is a low pass filter, G/D in-ear delay and volume, and Mixer is a Mixer. When a target sound mixing channel corresponding to a first path of sound signal is determined, if the channel to be processed is a middle channel, determining that the target sound mixing channel corresponding to the first path of sound signal of the middle channel is a left front door bass channel and a right front door bass channel, and the low-frequency signal in the first path of sound signal of the middle channel is 40Hz-199 Hz.
And if the channel to be processed is a left back surround channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the left back surround channel is a left back door bass channel.
And if the channel to be processed is a right rear surround channel, determining that a target sound mixing channel corresponding to a first path of sound signals of the right rear surround channel is a right rear door bass channel, and the low-frequency signals in the left surround channel and the first path of sound signals of the right surround channel are 40Hz-199 Hz.
And if the channel to be processed is a front left 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the front left 3D channel is a front left bass channel.
If the channel to be processed is a front right 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the front right 3D channel is a front right bass channel, and the low-frequency signals in the front left 3D channel and the first path of sound signal of the front right 3D channel are 40Hz-299 Hz.
And if the channel to be processed is a rear left 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the rear left 3D channel is a rear left door bass channel.
And if the channel to be processed is a rear right 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the rear right 3D channel is a rear right door bass channel, and the low-frequency signals in the rear left 3D channel and the first path of sound signal of the rear right 3D channel are 40Hz-299 Hz.
As can be seen from the above embodiments, the compensation of the channel is performed for the low frequency signal, and therefore, how to determine the channel to be processed is a precondition. The method for acquiring the channel to be processed in the sound source comprises the following steps: acquiring a required frequency width of a preset sound channel, acquiring a frequency width which can be played by a loudspeaker corresponding to the preset sound channel, wherein the frequency width is used as a loudspeaker frequency width, if the required frequency width is not in the range of the loudspeaker frequency width, determining that the loudspeaker corresponding to the preset sound channel does not have the low-frequency signal playing capability, and determining the preset sound channel as the sound channel to be processed. For the required bandwidth and the speaker bandwidth, reference may be made to the detailed description in table 1, which is not repeated herein.
The channel compensation method is processed in a Digital Signal Processing (DSP), wherein a global volume control and a multi-channel media playing signal chain are preset in the DSP, and the channel bass compensation signal chain needs to be embedded between the volume control and the multi-channel media playing signal chain. As shown in fig. 3, fig. 3 shows a schematic diagram of a channel bass compensation signal chain provided by an embodiment of the present application, since the channel bass compensation technology involves setting a volume gain, if the gain is positive, i.e. at the maximum volume, if the channel bass compensation technology signal chain is before the global volume control, the overall signal amplitude will exceed a preset volume threshold (e.g. 0dB), and in order to avoid clipping distortion, the channel bass compensation technology needs to be embedded after the volume control. The channel bass compensation technique is to remix multi-track sound sources, i.e. to re-edit sound sources, which is a precondition for the playing process of multi-channel media, and therefore should be embedded before the playing signal chain of multi-channel media.
Therefore, when acquiring the sound signal of the channel to be processed from the sound source, it is determined whether the volume of the sound source is greater than a preset volume threshold, and if so, clipping processing is performed on the part of the sound source, where the volume is greater than the preset volume threshold, to obtain the sound signal. In practical applications, the full amplitude, i.e., the maximum value, of the sound signal is 0dB, and only attenuation can be performed on this basis. According to the sampling theorem, when a discrete digital signal is converted into a continuous analog signal (sound signal), if the signal amplitude is greater than 0dB, the part greater than 0dB will not be converted into the analog signal, so that the part of the sound source with the volume greater than the preset volume threshold needs to be clipped to obtain the sound signal.
Fig. 4 is a schematic structural diagram of an acoustic channel compensation apparatus for audio according to an embodiment of the present disclosure, as shown in fig. 4, including:
the first obtaining unit 41 is configured to obtain a sound signal of a channel to be processed in a sound source, and copy the sound signal to obtain a first channel of sound signal and a second channel of sound signal, where a speaker corresponding to the channel to be processed does not have a low-frequency signal playing capability;
a second obtaining unit 42, configured to obtain the low-frequency signal in the first path of sound signal;
a determining unit 43, configured to determine a target mixed sound channel corresponding to the first sound signal, where the target mixed sound channel is a sound channel with the low-frequency signal playing capability;
a sound mixing unit 44, configured to mix the first sound signal with an original sound signal of the target mixed sound channel, and input the target mixed sound channel; and
and the input unit 45 is used for inputting the second path of sound signal into the channel to be processed.
The utility model provides a sound channel compensation arrangement of stereo set obtains the sound signal of sound source pending channel, after duplicating the sound signal and obtaining first way sound signal and second way sound signal, obtains the low frequency signal in the first way sound signal to confirm the first way sound signal corresponding target audio mixing channel, the target audio mixing channel is for possessing the channel of low frequency signal broadcast ability, carries out the audio mixing with the original sound signal of target audio mixing channel with first way sound signal, inputs the target audio mixing channel, inputs the pending channel with second way sound signal input. According to the embodiment of the application, the low-frequency expressive force of the sound channels with narrow bandwidth is improved, each sound channel can be output through the full frequency range of the loudspeaker, and the auditory perception of playing multi-channel sound tracks in a vehicle cabin is greatly improved.
According to an implementation manner of the embodiment of the present application, as shown in fig. 5, the apparatus further includes:
an adjusting unit 46, configured to adjust the in-ear delay and/or the volume of the low-frequency signal in the first sound signal according to the target mixed sound channel.
According to an implementation manner of the embodiment of the present application, as shown in fig. 5, the adjusting unit 46 includes:
a first obtaining module 461, configured to obtain a reference in-ear delay of the low-frequency signal of the target mixed sound channel; and
a first adjusting module 462, configured to adjust an in-ear delay of the low-frequency signal of the channel to be processed to be the reference in-ear delay;
a second obtaining module 463, configured to obtain a reference volume of the low-frequency signal of the target mixed sound channel; and
a second adjusting module 464, configured to adjust a volume of the low-frequency signal of the channel to be processed to the reference volume.
According to an implementation manner of the embodiment of the present application, the determining unit 43 is further configured to:
if the channel to be processed is a middle channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the middle channel is a front left door bass channel and a front right door bass channel;
if the channel to be processed is a left back surround channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the left back surround channel is a left back door bass channel;
if the sound channel to be processed is a right back surround sound channel, determining that a target sound mixing channel corresponding to a first sound signal of the right back surround sound channel is a right back door bass sound channel
If the channel to be processed is a front left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front left 3D channel is a front left door bass channel;
if the channel to be processed is a front right 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front right 3D channel is a front right bass channel;
if the channel to be processed is a rear left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the rear left 3D channel is a rear left door bass channel; and
and if the channel to be processed is a rear right 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the rear right 3D channel is a rear right door bass channel.
According to an implementation manner of the embodiment of the application, the low-frequency signal in the first path of sound signal of the center channel is 40Hz to 199 Hz;
the low frequency signal in the first sound signal of the left surround channel and the right surround channel is 40Hz-199 Hz;
the low-frequency signals in the first sound signals of the left front 3D sound channel and the right front 3D sound channel are 40Hz-299 Hz; and
and the low-frequency signals in the first sound signals of the left rear 3D sound channel and the right rear 3D sound channel are 40Hz-299 Hz.
According to an implementation manner of the embodiment of the present application, as shown in fig. 5, the apparatus further includes:
a third obtaining unit 47, configured to obtain a required bandwidth of a preset sound channel before obtaining a sound signal of a sound channel to be processed in a sound source;
a fourth obtaining unit 48, configured to obtain a bandwidth that can be played by a speaker corresponding to the preset sound channel, as a speaker bandwidth;
a determining unit 49, configured to determine that the speaker corresponding to the preset channel does not have a low-frequency signal playing capability when the required bandwidth is not within the range of the speaker bandwidth, and determine the preset channel as the channel to be processed.
According to an implementation manner of the embodiment of the present application, as shown in fig. 5, the first obtaining unit is further configured to, after confirming that the volume of the sound source is greater than a preset volume threshold, perform clipping processing on a portion of the sound source having a volume greater than the preset volume threshold to obtain the sound signal.
It should be noted that the foregoing explanation of the method embodiment is also applicable to the apparatus of the present embodiment, and the principle is the same, and the present embodiment is not limited thereto.
The present disclosure also provides an electronic device, a readable storage medium, and a computer program product according to embodiments of the present disclosure.
FIG. 6 illustrates a schematic block diagram of an example electronic device 600 that can be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the disclosure described and/or claimed herein.
As shown in fig. 6, the device 600 includes a computing unit 601 which can perform various appropriate actions and processes in accordance with a computer program stored in a ROM (Read-Only Memory) 602 or a computer program loaded from a storage unit 608 into a RAM (Random Access Memory) 603. In the RAM 603, various programs and data required for the operation of the device 600 can also be stored. The calculation unit 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An I/O (Input/Output) interface 605 is also connected to the bus 604.
A number of components in the device 600 are connected to the I/O interface 605, including: an input unit 606 such as a keyboard, a mouse, or the like; an output unit 607 such as various types of displays, speakers, and the like; a storage unit 608, such as a magnetic disk, optical disk, or the like; and a communication unit 609 such as a network card, modem, wireless communication transceiver, etc. The communication unit 609 allows the device 600 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The computing unit 601 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of the computing Unit 601 include, but are not limited to, a CPU (Central Processing Unit), a GPU (graphics Processing Unit), various dedicated AI (Artificial Intelligence) computing chips, various computing Units running machine learning model algorithms, a DSP (Digital Signal Processor), and any suitable Processor, controller, microcontroller, and the like. The calculation unit 601 performs the respective methods and processes described above, such as the acoustic channel compensation method. For example, in some embodiments, the acoustic channel compensation method may be implemented as a computer software program tangibly embodied in a machine-readable medium, such as storage unit 608. In some embodiments, part or all of the computer program may be loaded and/or installed onto the device 600 via the ROM 602 and/or the communication unit 609. When the computer program is loaded into the RAM 603 and executed by the computing unit 601, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the calculation unit 601 may be configured by any other suitable means (e.g. by means of firmware) to perform the aforementioned acoustic channel compensation method.
Various implementations of the systems and techniques described here above may be realized in digital electronic circuitry, Integrated circuitry, FPGAs (Field Programmable Gate arrays), ASICs (Application-Specific Integrated circuits), ASSPs (Application Specific Standard products), SOCs (System On Chip, System On a Chip), CPLDs (Complex Programmable Logic devices), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a RAM, a ROM, an EPROM (Electrically Programmable Read-Only-Memory) or flash Memory, an optical fiber, a CD-ROM (Compact Disc Read-Only-Memory), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a Display device (e.g., a CRT (Cathode Ray Tube) or LCD (Liquid Crystal Display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: LAN (Local Area Network), WAN (Wide Area Network), internet, and blockchain Network.
The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The Server can be a cloud Server, also called a cloud computing Server or a cloud host, and is a host product in a cloud computing service system, so as to solve the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service ("Virtual Private Server", or simply "VPS"). The server may also be a server of a distributed system, or a server incorporating a blockchain.
It should be noted that artificial intelligence is a subject for studying a computer to simulate some human thinking processes and intelligent behaviors (such as learning, reasoning, thinking, planning, etc.), and includes both hardware and software technologies. Artificial intelligence hardware technologies generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, big data processing, and the like; the artificial intelligence software technology mainly comprises a computer vision technology, a voice recognition technology, a natural language processing technology, machine learning/deep learning, a big data processing technology, a knowledge map technology and the like.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (11)
1. A method for acoustic channel compensation, comprising:
acquiring a sound signal of a sound channel to be processed in a sound source, and copying the sound signal to obtain a first path of sound signal and a second path of sound signal, wherein a loudspeaker corresponding to the sound channel to be processed does not have the low-frequency signal playing capacity;
acquiring the low-frequency signal in the first path of sound signal, and determining a target sound mixing channel corresponding to the first path of sound signal, wherein the target sound mixing channel is a channel with the low-frequency signal playing capability;
mixing the first path of sound signal with an original sound signal of the target sound mixing channel, and inputting the target sound mixing channel; and inputting the second path of sound signal into the sound channel to be processed.
2. The method of claim 1, wherein before mixing the first sound signal with the original sound signal of the target mixed channel, the method further comprises:
and adjusting the in-ear delay and/or the volume of the low-frequency signal according to the target mixed sound channel.
3. The channel compensation method according to claim 2, wherein the adjusting the in-ear delay and/or the volume of the low-frequency signal according to the target mixed channel comprises:
acquiring a reference in-ear delay of the low-frequency signal of the target sound mixing channel, and adjusting the in-ear delay of the low-frequency signal of the channel to be processed to the reference in-ear delay; and/or the presence of a gas in the gas,
and acquiring the reference volume of the low-frequency signal of the target sound mixing channel, and adjusting the volume of the low-frequency signal of the channel to be processed to the reference volume.
4. The channel compensation method according to any one of claims 1 to 3, wherein determining a target mixed channel corresponding to the first sound signal comprises:
if the channel to be processed is a middle channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the middle channel is a front left door bass channel and a front right door bass channel;
if the channel to be processed is a left surround channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the left back surround channel is a left back door bass channel;
if the channel to be processed is a right surround channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the right back surround channel is a right back door bass channel;
if the channel to be processed is a front left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front left 3D channel is a front left door bass channel;
if the channel to be processed is a front right 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the front right 3D channel is a front right bass channel;
if the channel to be processed is a rear left 3D channel, determining that a target sound mixing channel corresponding to a first path of sound signal of the rear left 3D channel is a rear left door bass channel; and
and if the channel to be processed is a rear right 3D channel, determining that a target sound mixing channel corresponding to the first path of sound signal of the rear right 3D channel is a rear right door bass channel.
5. The channel compensation method of claim 4, wherein the low frequency signal in the first sound signal of the center channel is 40Hz to 199 Hz;
the low frequency signal in the first sound signal of the left surround channel and the right surround channel is 40Hz-199 Hz;
the low-frequency signals in the first sound signals of the left front 3D sound channel and the right front 3D sound channel are 40Hz-299 Hz; and
and the low-frequency signals in the first sound signals of the left rear 3D sound channel and the right rear 3D sound channel are 40Hz-299 Hz.
6. Channel compensation method according to any of claims 1-3, characterized in that the channel to be processed is determined by:
acquiring the required bandwidth of a preset sound channel;
acquiring the frequency width which can be played by a loudspeaker corresponding to a preset sound channel as the frequency width of the loudspeaker;
and if the required frequency width is not in the range of the frequency width of the loudspeaker, determining that the loudspeaker corresponding to the preset sound channel does not have the low-frequency signal playing capability, and determining the preset sound channel as the sound channel to be processed.
7. The channel compensation method according to any one of claims 1 to 3, wherein obtaining the sound signal of the channel to be processed from the sound source comprises:
and after confirming that the volume of the sound source is greater than a preset volume threshold, carrying out clipping treatment on the part of which the volume is greater than the preset volume threshold so as to obtain the sound signal.
8. An acoustic channel compensation apparatus for a sound system, comprising:
the device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring sound signals of a channel to be processed in a sound source and copying the sound signals to obtain a first channel of sound signals and a second channel of sound signals, and a loudspeaker corresponding to the channel to be processed does not have low-frequency signal playing capability;
the second acquisition unit is used for acquiring the low-frequency signal in the first path of sound signal;
a determining unit, configured to determine a target mixed sound channel corresponding to the first channel of sound signal, where the target mixed sound channel is a sound channel with the low-frequency signal playing capability;
a sound mixing unit, configured to mix the first sound signal with the original sound signal of the target sound mixing channel determined by the determining unit, and input the target sound mixing channel; and
and the input unit is used for inputting the second path of sound signal into the sound channel to be processed.
9. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
10. A non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-7.
11. A computer program product, characterized in that it comprises a computer program which, when being executed by a processor, carries out the steps of the method according to any one of claims 1-7.
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