CN109992238B - Automatic volume adjusting system and method for multimedia terminal equipment - Google Patents
Automatic volume adjusting system and method for multimedia terminal equipment Download PDFInfo
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Abstract
The utility model provides a system and a method for automatically adjusting the volume of multimedia terminal equipment, wherein the system comprises a data processing center, and a multimedia sound source module, an environment sound sampling module and a multimedia playing module which are independently connected with the data processing center. According to the utility model, an audio playing feedback system is formed by arranging the data processing center and the environmental sound sampling module, the data processing center extracts and compares the environmental sound audio characteristic information with the sound source sound characteristic information according to the dynamic volume balance calculation module and the human hearing analog calculation module, compares the simulated human ear sensing volume with the user set volume, and adjusts the volume according to the noise change condition in the environment, the space change of the environment and other factors in real time, so that the self-adaptive adjustment of the volume is realized, the working pressure of human ear hearing and the analysis nerve is reduced, the dual effects of protecting the hearing system and optimizing the listening experience are achieved, and the real self-adaptive volume balance can be provided for the user.
Description
Technical Field
The utility model relates to the technical field of volume adjustment, in particular to an automatic volume adjustment system and method for multimedia terminal equipment.
Background
The existing volume adjustment modes of the multimedia terminal equipment are mostly touch screen control or key control, but the volume control modes need manual processing by a user, and when hands of the user are not free, the volume adjustment modes are not easy to operate and cannot be used for carrying out environment adaptive volume adjustment. In addition, in a noisy environment, such as in public places like bus stops and train stations, or houses at both sides of roads, sudden external noise may also make it impossible for a user to hear the specific contents of multimedia terminal devices such as movies, television programs, etc.
For the above scenes, the companies such as sony, apple, dolby and the like all study the automatic adjustment of the multimedia volume, and design a dynamic volume balancing (Dynamic Normalizer) technology for counting the sound sources based on a software algorithm completely. Although this type of technology solves the problem of different media source volumes from the software level, in the case of spatial layout variation, the media volume is submerged by noise due to the increase of external noise, and the volume is continuously changed due to the spatial layout variation, so that these external factors cannot be involved in the algorithm based on statistics of the original data of the multimedia source.
Disclosure of Invention
The utility model provides a system and a method for automatically adjusting the volume of a multimedia terminal device, which solve the technical problem that the existing multimedia tuning device cannot automatically adjust the volume of the external playing of the multimedia terminal device according to the change of external noise.
In order to solve the technical problems, the utility model provides an automatic volume adjusting system of multimedia terminal equipment, which comprises a data processing center, and a multimedia sound source module, an environmental sound sampling module and a multimedia playing module which are independently connected with the data processing center;
the multimedia sound source module is used for providing sound source signals of the multimedia terminal equipment for the data processing center in real time;
the multimedia playing module is used for playing the audio converted by the audio source signal according to the set volume of the user under the control of the data processing center;
the environment sound sampling module is used for providing environment sound digital signals for the data processing center;
the data processing center is used for separating and extracting the audio characteristic information of the environmental sound from the digital signal of the environmental sound, simulating the corresponding perceived volume of human ears, and extracting the audio characteristic information of the sound source and the user-set volume from the played sound source signal; and comparing the environmental sound audio feature information with the sound source sound feature information one by one, comparing the human ear perceived volume with the user set volume, if the environmental sound audio feature information is matched and consistent with the sound source sound feature information, and the human ear perceived volume is matched and consistent with the user set volume, keeping the output volume of the sound source signal, otherwise, increasing or decreasing the output volume of the sound source signal;
the multimedia playing module is also used for keeping, increasing or reducing the output volume of the sound source signal under the adjustment of the data processing center.
The environment sound sampling module comprises a sound receiving microphone and an analog-to-digital conversion module which are connected with each other, and the analog-to-digital conversion module is also connected with the data processing center;
the sound receiving microphone is used for collecting external environment sound, generating corresponding external environment sound analog signals and sending the corresponding external environment sound analog signals to the analog-to-digital conversion module, wherein the external environment sound comprises sound source external sound and environment noise played by the multimedia playing module;
the analog-to-digital conversion module is used for converting the external environment sound analog signal into the external environment sound digital signal and sending the external environment sound digital signal to the data processing center.
The data processing center comprises a dynamic volume balance calculation module and a human hearing simulation calculation module;
the dynamic volume balance calculation module is used for separating and extracting the environmental sound audio characteristic information from the environmental sound digital signal according to a dynamic volume balance algorithm, extracting the sound source sound characteristic information from the played sound source signal, and acquiring the user set volume;
the human auditory simulation calculation module is used for simulating the human ear perception volume corresponding to the environment sound digital signal according to a human auditory simulation algorithm;
the dynamic volume balance calculation module is further configured to compare the environmental sound audio feature information with the sound source sound feature information one by one, compare the human ear perceived volume with the user set volume, and if the environmental sound audio feature information matches with the sound source sound feature information and the human ear perceived volume matches with the user set volume, maintain the output volume of the sound source signal, otherwise increase or decrease the output volume of the sound source signal.
The dynamic volume balance calculation module is further configured to compare the environmental sound audio feature information with the sound source sound feature information, compare the human ear perceived volume with the user set volume one by one, and if the environmental sound audio feature information matches with the sound source sound feature information and the human ear perceived volume matches with the user set volume, maintain the output volume of the sound source signal, otherwise increase or decrease the output volume of the sound source signal, specifically:
if the matching degree of the audio characteristic information of the environment sound and the audio characteristic information of the sound source is within a characteristic information preset matching range, and the absolute value of the difference between the human ear perceived volume and the user set volume is within a preset fluctuation range, comparing and keeping the output volume of the sound source signal;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the characteristic information preset matching range, the human ear perception volume is larger than the user set volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than the first preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is increased;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the preset matching range of the characteristic information, the user set volume is larger than the human ear perceived volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than a second preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is reduced;
and if the matching degree of the environment sound audio frequency characteristic information and the sound source sound characteristic information is not in the preset matching range of the characteristic information, increasing the output volume of the sound source signal.
The multimedia playing module comprises a decoder, a digital-to-analog conversion module and an externally-placed loudspeaker which are sequentially connected, and the decoder is also connected with the dynamic volume balance calculation module and the human auditory simulation calculation module;
the decoder is used for decoding the sound source signal and outputting the decoded sound source signal to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for simulating the decoded sound source signal and outputting the sound source signal to the externally-placed loudspeaker;
the external loudspeaker is used for playing the simulated sound source signals according to the user set volume and keeping, increasing or reducing the output volume of the sound source signals according to the dynamic volume balance calculation module.
The sound receiving microphones are arranged at the central position of the listener area and are provided with one, two or more;
when at least two sound receiving microphones are arranged, the data processing center obtains average results of all adjustment results of the sound receiving microphones, and finally outputs the average results to the external loudspeaker.
The utility model also provides an automatic volume adjusting method of the multimedia terminal equipment, which comprises the following steps:
s1, acquiring a sound source signal of the multimedia terminal equipment;
s2, playing the sound source signal according to the volume set by the user;
s3, collecting environmental sound and generating a corresponding environmental sound digital signal;
s4, separating and extracting the audio characteristic information of the environmental sound from the digital signal of the environmental sound, simulating the corresponding perceived volume of human ears, and extracting the audio characteristic information of the sound source and the user-set volume from the played sound source signal;
s5, comparing the environment sound audio frequency characteristic information with the sound source sound characteristic information one by one, comparing the human ear perception volume with the user set volume, if the environment sound audio frequency characteristic information is matched and consistent with the sound source sound characteristic information, and the human ear perception volume is matched and consistent with the user set volume, keeping the output volume of the sound source signal, otherwise, increasing or decreasing the output volume of the sound source signal.
In the step S5, if the environmental sound audio feature information matches the sound source sound feature information and the human ear perceived volume matches the user set volume, the output volume of the sound source signal is maintained, otherwise, the output volume of the sound source signal is increased or decreased, specifically:
if the matching degree of the audio characteristic information of the environment sound and the audio characteristic information of the sound source is within a characteristic information preset matching range, and the absolute value of the difference between the human ear perceived volume and the user set volume is within a preset fluctuation range, comparing and keeping the output volume of the sound source signal;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the characteristic information preset matching range, the human ear perception volume is larger than the user set volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than the first preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is increased;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the preset matching range of the characteristic information, the user set volume is larger than the human ear perceived volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than a second preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is reduced;
and if the matching degree of the environment sound audio frequency characteristic information and the sound source sound characteristic information is not in the preset matching range of the characteristic information, increasing the output volume of the sound source signal.
When there are at least two independent digital signals of the environmental sound, the method further comprises the following steps after the step S5: s6, calculating an average result of the adjustment results of each path of the environmental sound digital signals, and adjusting the output volume of the sound source signals according to the average result.
According to the utility model, an audio playing feedback system is formed by arranging the data processing center and the environmental sound sampling module, the data processing center extracts and compares the environmental sound audio characteristic information with the sound source sound characteristic information according to the dynamic volume balance calculation module and the human hearing analog calculation module, compares the simulated human ear sensing volume with the user set volume, and adjusts the volume according to the noise change condition in the environment, the space change of the environment and other factors in real time, so that the self-adaptive adjustment of the volume is realized, the working pressure of human ear hearing and the analysis nerve is reduced, the dual effects of protecting the hearing system and optimizing the listening experience are achieved, and the real self-adaptive volume balance can be provided for the user.
Drawings
Fig. 1 is a frame diagram of an automatic volume adjustment system for a multimedia terminal device according to an embodiment of the present utility model;
fig. 2 is a flow chart of automatic volume adjustment of a method for automatically adjusting volume of a multimedia terminal device according to an embodiment of the present utility model;
FIG. 3 is a flow chart of the audio contrast adjustment of FIG. 2 provided by an embodiment of the present utility model;
wherein: a multimedia sound source module 1; the system comprises a data processing center 2, a dynamic volume balance calculation module 21 and a human hearing simulation calculation module 22; the environment sound sampling module 3, the sound receiving microphone 31 and the analog-to-digital conversion module 32; a multimedia playing module 4, a decoder 41, a digital-to-analog conversion module 42 and an external loudspeaker 43.
Detailed Description
The following examples are given for the purpose of illustration only and are not to be construed as limiting the utility model, including the drawings for reference and description only, and are not to be construed as limiting the scope of the utility model as many variations thereof are possible without departing from the spirit and scope of the utility model.
Referring to fig. 1, in this embodiment, the present utility model provides an automatic volume adjustment system for a multimedia terminal device, which includes a data processing center 2, and a multimedia sound source module 1, an environmental sound sampling module 3, and a multimedia playing module 4 that are independently connected with the data processing center 2;
the multimedia sound source module 1 is configured to provide a sound source signal of the multimedia terminal device for the data processing center 2 in real time;
the multimedia playing module 4 is used for playing the audio converted by the audio source signal according to the user-set volume under the control of the data processing center 2;
the environmental sound sampling module 3 is used for providing an environmental sound digital signal for the data processing center 2;
the data processing center 2 is used for separating and extracting the audio characteristic information of the environmental sound from the digital signal of the environmental sound, simulating the corresponding perceived volume of human ears, and extracting the audio characteristic information of the sound source and the user-set volume from the played sound source signal; and comparing the environmental sound audio feature information with the sound source sound feature information one by one, comparing the human ear perception volume with the user set volume one by one, if the environmental sound audio feature information is matched and consistent with the sound source sound feature information, and the human ear perception volume is matched and consistent with the user set volume, keeping the output volume of the sound source signal, otherwise, increasing or decreasing the output volume of the sound source signal;
the multimedia playing module 4 is further configured to maintain, increase or decrease the output volume of the audio source signal under the adjustment of the data processing center 2.
The environment sound sampling module 3 comprises a radio microphone 31 and an analog-to-digital conversion module 32 which are connected with each other, and the analog-to-digital conversion module 32 is also connected with the data processing center 2;
the sound receiving microphone 31 is configured to collect external environmental sound, generate a corresponding external environmental sound analog signal, and send the external environmental sound to the analog-to-digital conversion module 32, where the external environmental sound includes sound source external sound and environmental noise played by the multimedia playing module 4;
the analog-to-digital conversion module 32 is configured to convert the external environmental sound analog signal into the external environmental sound digital signal and send the external environmental sound digital signal to the data processing center 2.
The data processing center 2 comprises a dynamic volume balance calculation module 21 and a human hearing simulation calculation module 22;
the dynamic volume balance calculation module 21 is configured to extract the audio feature information of the environmental sound from the digital signal of the environmental sound according to a dynamic volume balance algorithm, extract the audio feature information of the audio source from the played audio source signal, and obtain the user set volume;
the human auditory simulation calculation module 22 is configured to simulate the human auditory perception volume corresponding to the environmental sound digital signal according to a human auditory simulation algorithm;
the dynamic volume balance calculation module 21 is further configured to compare the environmental sound audio feature information with the sound source sound feature information one by one, compare the human ear perceived volume with the user set volume, and if the environmental sound audio feature information matches with the sound source sound feature information and the human ear perceived volume matches with the user set volume, maintain the output volume of the sound source signal, otherwise increase or decrease the output volume of the sound source signal.
The dynamic volume balance calculation module 21 is further configured to compare the environmental sound audio feature information with the sound source sound feature information one by one, compare the human ear perceived volume with the user set volume, and if the environmental sound audio feature information matches with the sound source sound feature information and the human ear perceived volume matches with the user set volume, maintain the output volume of the sound source signal, otherwise increase or decrease the output volume of the sound source signal, specifically:
if the matching degree of the audio characteristic information of the environment sound and the audio characteristic information of the sound source is within a characteristic information preset matching range, and the absolute value of the difference between the human ear perceived volume and the user set volume is within a preset fluctuation range, comparing and keeping the output volume of the sound source signal;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the characteristic information preset matching range, the human ear perception volume is larger than the user set volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than the first preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is increased;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the preset matching range of the characteristic information, the user set volume is larger than the human ear perceived volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than a second preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is reduced;
and if the matching degree of the environment sound audio frequency characteristic information and the sound source sound characteristic information is not in the preset matching range of the characteristic information, increasing the output volume of the sound source signal.
The multimedia playing module 4 comprises a decoder 41, a digital-to-analog conversion module 42 and an externally-placed loudspeaker 43 which are sequentially connected, wherein the decoder 41 is also connected with the dynamic volume balance calculation module 21 and the human auditory analog calculation module 22;
the decoder 41 is configured to decode the audio signal and output the decoded audio signal to the digital-to-analog conversion module 42;
the digital-to-analog conversion module 42 is configured to simulate the decoded audio signal and output the simulated audio signal to the loudspeaker 43;
the loud speaker 43 is used for playing the simulated sound source signal according to the user set volume, and maintaining, increasing or decreasing the output volume of the sound source signal according to the dynamic volume balance calculation module 21.
The radio microphone 31 is installed at the center of the listener area and provided with one, two or more;
when at least two of the sound receiving microphones 31 are provided, the data processing center 2 averages the adjustment results of all the sound receiving microphones 31 and outputs the averaged result to the external speaker 43.
Referring to fig. 2, the embodiment of the present utility model further provides an automatic volume adjustment method for a multimedia terminal device, corresponding to the automatic volume adjustment system for a multimedia terminal device, including the steps of:
s1, acquiring a sound source signal of the multimedia terminal equipment;
s2, playing the sound source signal according to the volume set by the user;
s3, collecting environmental sound and generating a corresponding environmental sound digital signal;
s4, separating and extracting the audio characteristic information of the environmental sound from the digital signal of the environmental sound, simulating the corresponding perceived volume of human ears, and extracting the audio characteristic information of the sound source and the user-set volume from the played sound source signal;
s5, comparing the environmental sound audio characteristic information with the sound source sound characteristic information one by one, comparing the human ear sensing volume with the user set volume, if the environmental sound audio characteristic information is matched and consistent with the sound source sound characteristic information, and the human ear sensing volume is matched and consistent with the user set volume, keeping the output volume of the sound source signal, otherwise, increasing or decreasing the output volume of the sound source signal.
Referring to fig. 3, in the step S5, if the matching of the environmental sound audio feature information and the sound source sound feature information is consistent, and the human ear perceived volume is consistent with the user set volume, the output volume of the sound source signal is maintained, otherwise, the output volume of the sound source signal is increased or decreased, specifically:
if the matching degree of the audio characteristic information of the environment sound and the audio characteristic information of the sound source is within a characteristic information preset matching range, and the absolute value of the difference between the human ear perceived volume and the user set volume is within a preset fluctuation range, comparing and keeping the output volume of the sound source signal;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the characteristic information preset matching range, the human ear perception volume is larger than the user set volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than the first preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is increased;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the preset matching range of the characteristic information, the user set volume is larger than the human ear perceived volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than a second preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is reduced;
and if the matching degree of the environment sound audio frequency characteristic information and the sound source sound characteristic information is not in the preset matching range of the characteristic information, increasing the output volume of the sound source signal.
When there are at least two independent digital signals of the environmental sound, the method further comprises the following steps after the step S5: s6, calculating an average result of the adjustment results of each path of the environmental sound digital signals, and adjusting the output volume of the sound source signals according to the average result. For example, the radio microphones 31 are respectively arranged at the center or two sides of the middle-rear section of the public classroom, and when processing the environmental sound data, it is necessary to average the environmental sound data collected by the radio microphones 31 distributed around, and the average value is used as the comparison data with the sound volume information preset by the user.
The specific workflow of volume adjustment is as follows:
the multimedia playing module 4 sends the audio information which is coded by the data processing center 2 according to the preset volume of the user to the decoder 41 for decoding, the decoded audio information converts the digital signal into an analog signal by the digital-to-analog converter 42, and finally the analog signal is pushed to the external loudspeaker 43 for amplifying and playing;
at this time, the radio microphone 31 fixed on site collects the audio played from the external loudspeaker 43, the external audio is digitally converted by the analog-to-digital converter 32, and the external audio information is sent to the data processing center 2; the data processing center 2 respectively recognizes the audio characteristic information of the environmental sound in the externally-placed audio through the dynamic volume balance calculation module 21, simulates the perceived volume of the human ear through the human hearing simulation calculation module 22, and compares the two with the audio characteristic information extracted from the audio source and the audio source volume information preset by the user for adjustment;
wherein, firstly, the dynamic volume balance calculation module 21 maintains the original set output audio frequency according to the comparison of the audio frequency characteristic information of the environment sound and the audio source characteristic information when the comparison result is consistent; when the comparison results are inconsistent, the volume is adjusted up or down according to the first preset amplitude;
secondly, when the characteristic information is consistent, the human auditory simulation calculation module 22 simulates the perceived volume of human ears to be compared with the volume preset by a user, and when the absolute value of the difference between the perceived volume of the human ears and the volume preset by the user is within a preset fluctuation range, the comparison is consistent, and the output volume of the sound source signal is maintained; when the human ear sensing volume is larger than the user setting volume and the difference value of the human ear sensing volume and the user setting volume is larger than the first preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is increased; when the user set volume is larger than the human ear perceived volume and the difference value of the user set volume and the human ear perceived volume is larger than the second preset difference value, the comparison is inconsistent, the output volume of the sound source signal is reduced, and finally the degree that the user can hear the characteristic information of the audio frequency and the volume is moderate is achieved.
According to the embodiment of the utility model, an audio playing feedback system is formed by arranging the data processing center and the environmental sound sampling module, the data processing center extracts and compares the environmental sound audio characteristic information with the sound source sound characteristic information according to the dynamic volume balance calculation module and the human hearing simulation calculation module, compares the simulated human ear sensing volume with the user set volume, and adjusts the volume according to the noise change condition in the environment, the space change of the environment and other factors in real time, so that the self-adaptive adjustment of the volume is realized, the working pressure of human ear hearing and analysis nerves is reduced, the dual effects of protecting the hearing system and optimizing the listening experience are achieved, and the real self-adaptive volume balance can be provided for the user.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.
Claims (9)
1. The automatic volume adjusting system of the multimedia terminal equipment is characterized by comprising a data processing center, and a multimedia sound source module, an environment sound sampling module and a multimedia playing module which are independently connected with the data processing center;
the multimedia sound source module is used for providing sound source signals of the multimedia terminal equipment for the data processing center in real time;
the multimedia playing module is used for playing the audio converted by the audio source signal according to the set volume of the user under the control of the data processing center;
the environment sound sampling module is used for providing environment sound digital signals for the data processing center;
the data processing center is used for separating and extracting the audio characteristic information of the environmental sound from the digital signal of the environmental sound, simulating the corresponding perceived volume of human ears, and extracting the audio characteristic information of the sound source and the user-set volume from the played sound source signal; and comparing the environmental sound audio feature information with the sound source sound feature information one by one, comparing the human ear perceived volume with the user set volume, if the environmental sound audio feature information is matched and consistent with the sound source sound feature information, and the human ear perceived volume is matched and consistent with the user set volume, keeping the output volume of the sound source signal, otherwise, increasing or decreasing the output volume of the sound source signal;
the multimedia playing module is also used for keeping, increasing or reducing the output volume of the sound source signal under the adjustment of the data processing center.
2. The automatic volume adjustment system for a multimedia terminal equipment according to claim 1, wherein: the environment sound sampling module comprises a sound receiving microphone and an analog-to-digital conversion module which are connected with each other, and the analog-to-digital conversion module is also connected with the data processing center;
the sound receiving microphone is used for collecting external environment sound, generating corresponding external environment sound analog signals and sending the corresponding external environment sound analog signals to the analog-to-digital conversion module, wherein the external environment sound comprises sound source external sound and environment noise played by the multimedia playing module;
the analog-to-digital conversion module is used for converting the external environment sound analog signal into the external environment sound digital signal and sending the external environment sound digital signal to the data processing center.
3. The automatic volume adjustment system for a multimedia terminal equipment according to claim 2, wherein: the data processing center comprises a dynamic volume balance calculation module and a human hearing simulation calculation module;
the dynamic volume balance calculation module is used for separating and extracting the environmental sound audio characteristic information from the environmental sound digital signal according to a dynamic volume balance algorithm, extracting the sound source sound characteristic information from the played sound source signal, and acquiring the user set volume;
the human auditory simulation calculation module is used for simulating the human ear perception volume corresponding to the environment sound digital signal according to a human auditory simulation algorithm;
the dynamic volume balance calculation module is further configured to compare the environmental sound audio feature information with the sound source sound feature information one by one, compare the human ear perceived volume with the user set volume, and if the environmental sound audio feature information matches with the sound source sound feature information and the human ear perceived volume matches with the user set volume, maintain the output volume of the sound source signal, otherwise increase or decrease the output volume of the sound source signal.
4. The automatic volume adjustment system of a multimedia terminal device according to claim 3, wherein the dynamic volume balance calculation module is further configured to compare the environmental sound audio feature information with the sound source sound feature information one by one, compare the human ear perceived volume with the user set volume, and if the environmental sound audio feature information matches with the sound source sound feature information and the human ear perceived volume matches with the user set volume, maintain the output volume of the sound source signal, and otherwise increase or decrease the output volume of the sound source signal, specifically:
if the matching degree of the audio characteristic information of the environment sound and the audio characteristic information of the sound source is within a characteristic information preset matching range, and the absolute value of the difference between the human ear perceived volume and the user set volume is within a preset fluctuation range, comparing and keeping the output volume of the sound source signal;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the characteristic information preset matching range, the human ear perception volume is larger than the user set volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than the first preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is increased;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the preset matching range of the characteristic information, the user set volume is larger than the human ear perceived volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than a second preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is reduced;
and if the matching degree of the environment sound audio frequency characteristic information and the sound source sound characteristic information is not in the preset matching range of the characteristic information, increasing the output volume of the sound source signal.
5. The automatic volume adjustment system for a multimedia terminal apparatus according to claim 4, wherein: the multimedia playing module comprises a decoder, a digital-to-analog conversion module and an externally-placed loudspeaker which are sequentially connected, and the decoder is also connected with the dynamic volume balance calculation module and the human auditory simulation calculation module;
the decoder is used for decoding the sound source signal and outputting the decoded sound source signal to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for simulating the decoded sound source signal and outputting the sound source signal to the externally-placed loudspeaker;
the external loudspeaker is used for playing the simulated sound source signals according to the user set volume and keeping, increasing or reducing the output volume of the sound source signals according to the dynamic volume balance calculation module.
6. The automatic volume adjustment system for a multimedia terminal equipment as claimed in claim 5, wherein: the sound receiving microphones are arranged at the central position of the listener area and are provided with one, two or more;
when at least two sound receiving microphones are arranged, the data processing center obtains average results of all adjustment results of the sound receiving microphones, and finally outputs the average results to the external loudspeaker.
7. An automatic volume adjusting method for a multimedia terminal device, comprising the steps of:
s1, acquiring a sound source signal of the multimedia terminal equipment;
s2, playing the sound source signal according to the volume set by the user;
s3, collecting environmental sound and generating a corresponding environmental sound digital signal;
s4, separating and extracting the audio characteristic information of the environmental sound from the digital signal of the environmental sound, simulating the corresponding perceived volume of human ears, and extracting the audio characteristic information of the sound source and the user-set volume from the played sound source signal;
s5, comparing the environment sound audio frequency characteristic information with the sound source sound characteristic information one by one, comparing the human ear perception volume with the user set volume, if the environment sound audio frequency characteristic information is matched and consistent with the sound source sound characteristic information, and the human ear perception volume is matched and consistent with the user set volume, keeping the output volume of the sound source signal, otherwise, increasing or decreasing the output volume of the sound source signal.
8. The method for automatically adjusting the volume of a multimedia terminal device according to claim 7, wherein in the step S5, if the matching of the environmental sound audio feature information and the sound source sound feature information is consistent, and the human ear perceived volume is consistent with the user set volume, the output volume of the sound source signal is maintained, and otherwise, the output volume of the sound source signal is increased or decreased, specifically:
if the matching degree of the audio characteristic information of the environment sound and the audio characteristic information of the sound source is within a characteristic information preset matching range, and the absolute value of the difference between the human ear perceived volume and the user set volume is within a preset fluctuation range, comparing and keeping the output volume of the sound source signal;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the characteristic information preset matching range, the human ear perception volume is larger than the user set volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than the first preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is increased;
if the matching degree of the environmental sound audio characteristic information and the sound source sound characteristic information is in the preset matching range of the characteristic information, the user set volume is larger than the human ear perceived volume, and the difference value of the environmental sound audio characteristic information and the sound source sound characteristic information is larger than a second preset difference value, the comparison is inconsistent, and the output volume of the sound source signal is reduced;
and if the matching degree of the environment sound audio frequency characteristic information and the sound source sound characteristic information is not in the preset matching range of the characteristic information, increasing the output volume of the sound source signal.
9. The automatic volume adjusting method of a multimedia terminal equipment according to claim 8, further comprising, after said step S5, the steps of: s6, calculating an average result of the adjustment results of each path of the environmental sound digital signals, and adjusting the output volume of the sound source signals according to the average result.
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| TWI783344B (en) * | 2021-01-11 | 2022-11-11 | 圓展科技股份有限公司 | Sound source tracking system and method |
| CN114138225A (en) * | 2021-11-03 | 2022-03-04 | 东风汽车集团股份有限公司 | Vehicle-mounted entertainment system volume self-adaption method |
| CN115086476B (en) * | 2022-04-26 | 2024-06-25 | 北京达佳互联信息技术有限公司 | Multimedia play adjusting method and device, electronic equipment and storage medium |
| CN116567483B (en) * | 2023-04-18 | 2024-02-09 | 北京万讯博通科技发展有限公司 | Intelligent management method and system for infrared wireless teaching sound expansion |
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