KR102250303B1 - Sound source player - Google Patents

Abstract

According to an embodiment of the present invention, there is provided an input unit for receiving sound data; A metadata extracting unit for extracting sound metadata including frequency data and volume data from the sound data; An analysis unit for loading reproduction setting data for reproducing a sound source and updating the reproduction setting data to customized reproduction setting data according to the sound metadata; And a reproducing unit that processes sound source data for reproducing a sound source, wherein the reproducing unit changes at least one of frequency data and volume data of the sound source data according to the customized playback setting data.

Description

Sound source playback device {SOUND SOURCE PLAYER}

The present invention relates to a sound source reproducing apparatus attached to a vehicle.

Vehicles in motion (including vehicles, trains, motorcycles, drones, and aircraft, etc.) are very noisy. From the driver's point of view, the sensitivity to audio quality is also high because the demand for listening to audio functions such as radio or stored music playback is high while the vehicle is driving. Moreover, with the development of ADAS and the development of autonomous driving technology, the consumption of multimedia in vehicles is expected to increase rapidly.

In this background, the vehicle environment is required to have a high level of audio quality, but the unique noise environment and the lack of a personalization method capable of satisfying the individual requirements of the occupants have failed to meet the demand. It is reality.

An object of the present invention is to provide a personalized sound source reproducing apparatus that reflects the vehicle environment and satisfies individual requirements of passengers.

According to an embodiment of the present invention, there is provided an input unit for receiving sound data; A metadata extracting unit for extracting sound metadata including frequency data and volume data from the sound data; An analysis unit for loading reproduction setting data for reproducing a sound source and updating the reproduction setting data to customized reproduction setting data according to the sound metadata; And a reproducing unit that processes sound source data for reproducing a sound source, wherein the reproducing unit changes at least one of frequency data and volume data of the sound source data according to the customized playback setting data.

According to an embodiment of the present invention, there is provided a sound source reproducing apparatus, wherein the customized reproduction setting data includes at least one of a frequency filter for changing the frequency data and a volume filter for changing the volume data.

According to an embodiment of the present invention, when a sound reinforcement in a low-frequency region is required as a result of analyzing the acoustic metadata, the analysis unit sets the customized reproduction setting data to include a low-pass filter.

According to an embodiment of the present invention, when reinforcing sound in a high-frequency region is required as a result of analyzing the acoustic metadata, the analysis unit sets custom reproduction setting data to include a high-frequency pass filter.

According to an embodiment of the present invention, the acoustic data includes a noise signal collected through an input device while driving a vehicle, a listener's hearing level for each frequency, a sound tuning parameter according to vehicle space and structural characteristics, a listener preferred sound setting value, and A sound source reproducing apparatus including at least one of vehicle driving mode data is provided.

According to an embodiment of the present invention, the analysis unit assigns a weight to each of the noise signal, the listener's hearing level for each frequency, the sound tuning parameter, the listener's preferred sound setting value, and the vehicle driving mode data, and the A sound source reproducing apparatus is provided for updating the reproduction setting data to customized reproduction setting data according to the sound metadata to which a weight is assigned.

According to an embodiment of the present invention, the analysis unit assigns the highest weight to the listener's preferred sound setting value, and the analyzed frequency data according to the noise signal, the listener's frequency-specific hearing level, and the sound tuning parameter A sound source reproducing apparatus is provided that applies a frequency filter to match frequency data according to the listener's preferred sound setting value.

According to an embodiment of the present invention, the input unit includes a wireless communication module, and the wireless communication module receives the sound data including a listener's frequency-specific hearing level and a listener preferred sound setting value from an external database through wireless communication. A sound source reproducing apparatus for receiving is provided.

According to an embodiment of the present invention, the input unit receives vehicle driving environment information including weather information and road environment information, and receives the related sound data from the external database according to the received vehicle driving environment information, A sound source reproducing apparatus is provided.

According to an embodiment of the present invention, a sound source reproducing apparatus is provided in which the analysis unit assigns a driver ID to each driver driving a vehicle, matches the driver ID with the customized playback setting data, and stores the matching.

According to an embodiment of the present invention, it is possible to provide a personalized sound source reproducing apparatus capable of reflecting a vehicle environment and satisfying individual requirements of passengers.

In addition, according to an embodiment of the present invention, by controlling the frequency and volume of the sound source, it is possible to reproduce the sound source according to the environment around the vehicle.

1 is a block diagram showing an apparatus for reproducing a sound source according to an embodiment of the present invention.
2 is a block diagram showing a sound source reproducing apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a method of operating a sound source reproducing apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating a method of operating a sound source reproducing apparatus according to an embodiment of the present invention.

In the present invention, various modifications may be made and various forms may be applied, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

The sound source reproducing apparatus according to an exemplary embodiment of the present invention may adjust and reproduce the volume of the sound source for each frequency in accordance with the surrounding environment of the driving vehicle and the preference of the vehicle driver based on the input sound data.

1 is a block diagram showing an apparatus for reproducing a sound source according to an embodiment of the present invention.

The sound source reproducing apparatus 10 is installed in a vehicle to reproduce a sound source file, and provides audio content to a vehicle occupant. In this case, the vehicle in the present invention means any vehicle on which a person rides, including a car, a train, a two-wheeled vehicle, an aircraft, and the like. Accordingly, the sound source reproducing apparatus 10 may be of various types, such as car audio provided to a vehicle and an entertainment system provided to an aircraft.

Referring to FIG. 1, the sound source reproducing apparatus 10 includes an input unit 100, a metadata extracting unit 200, an analysis unit 300, and a reproducing unit 400.

The input unit 100 receives sound data from the outside of the sound source reproducing apparatus 10. In this case, the acoustic data may include a noise signal, a listener's hearing level for each frequency, a sound tuning parameter, a listener's preferred sound setting value, and vehicle driving mode data. Since the types of sound data are various, the input unit 100 for collecting sound data may also include various configurations.

The input unit 100 includes, for example, a recording module for collecting noise signals around the vehicle and inside the vehicle, a listener's frequency-specific audiogram from an external database, a sound tuning parameter according to vehicle space and structural characteristics, and a founder's preferred sound It may include a wireless communication module or the like for receiving a set value or the like. Details of the acoustic data collection means included in the input unit 100 will be described later.

The input unit 100 transmits the collected sound data to the metadata extraction unit 200.

The metadata extracting unit 200 extracts sound metadata including frequency data and volume data from the received sound data. In this case, the frequency data and volume data include not only analyzing the frequency configuration and the size of the sound data received from the input unit 100, but also analyzing the effect of the sound data on reproducing the sound source.

The data processing operation performed by the metadata extractor 200 may thus vary according to the type of sound data. For example, when the sound data is a noise signal around the vehicle and inside the vehicle, the metadata extracting unit 200 analyzes the noise signal and analyzes the loudness of each frequency constituting the noise signal. Accordingly, the sound metadata extracted from the noise signal may be composed of frequency data indicating a frequency of the noise signal and volume data indicating a volume for each frequency. For example, the acoustic metadata may be provided in a form that quantitatively quantifies the volume of each frequency as shown in Table 1 below, and represents the volume measured for each frequency as a negative number. Accordingly, it is possible to intuitively reflect how much and in which band the noise signal appears.

frequency 20hz-60hz 60hz-350hz 350hz-800hz 800hz-2khz 2khz-5khz 5khz-7khz 7khz-20khz size -7 -10 -5 -One 0 0 0

Another example of the data processing operation by the metadata extracting unit 200 may be a case where sound data is a listener's audiogram for each frequency. The listener's audiogram for each frequency may be data previously collected and stored in an external database. Alternatively, the listener's audiogram for each frequency may be newly collected through a preset program in the input unit. For example, a user may execute a program for evaluating a hearing level for each frequency built into the sound source reproducing apparatus, and may evaluate the user's hearing level for each frequency on the program and provide it to the input unit. The listener's audiogram for each frequency may be displayed as a negative value or a positive value for each frequency. For example, when the listener's hearing degree in a specific frequency region is above average, the evaluation value at the corresponding frequency may be expressed as a positive number. Conversely, when the listener's hearing degree in a specific frequency region is below the average, the evaluation value at the corresponding frequency may be expressed as a negative number. For example, the sound metadata extracted from the listener's audiogram for each frequency may be displayed in the form as follows.

frequency 20hz-60hz 60hz-350hz 350hz-800hz 800hz-2khz 2khz-5khz 5khz-7khz 7khz-20khz size 0 2 One 0 -One -2 -5

According to the acoustic metadata processed by the metadata extracting unit 200, the listener has excellent hearing ability in the low-pitched region and poor hearing in the high-pitched tone region. Accordingly, even when listening to the same sound source, the above listener can not hear the sound in the high-pitched region and can hear the sound in the low-pitched region well. The acoustic metadata represents the audiogram as a positive value or a negative value in order to reflect the characteristics of the listener in the reproduction of sound source data. Another example of the data processing operation by the metadata extraction unit 200 is that the acoustic data is a vehicle For example, it is the case of driving mode data. In this case, the metadata extractor may receive the driving mode data of the vehicle from the ECU or the like, and then load the acoustic metadata set according to the vehicle driving mode. In this case, the acoustic metadata may indicate which band of sound is to be emphasized, and may be data including a positive value for a band to be emphasized. For example, in the case of a sports driving mode, the acoustic metadata may be configured to give a positive value to the low-pitched tone band so that the sound of the low-pitched tone band can be emphasized according to the emphasized engine sound.

frequency 20hz-60hz 60hz-350hz 350hz-800hz 800hz-2khz 2khz-5khz 5khz-7khz 7khz-20khz size 4 3 3 0 0 0 0

The metadata extractor 200 extracts and provides sound tuning parameters according to vehicle space and structural characteristics and listener preferred sound setting values in the form of sound metadata quantified as negative or positive values for each band as described above. The sound metadata extracted by the metadata extraction unit 200 may be transmitted to the analysis unit 300.

The analysis unit 300 loads playback setting data for reproducing a sound source, and updates the playback setting data into customized playback setting data according to the sound metadata.

The reproduction setting data loaded by the analysis unit 300 refers to a setting value used to reproduce a sound source in the sound source reproducing apparatus. Specifically, the playback setting data may include a default volume value and a default equalizer setting. For example, the playback setting data loaded by the analysis unit 300 may be in the form as follows.

frequency 20hz-60hz 60hz-350hz 350hz-800hz 800hz-2khz 2khz-5khz 5khz-7khz 7khz-20khz weight - - - - - - -

After loading the playback setting data, the analysis unit 300 may update the playback setting data into customized playback setting data according to the sound metadata received from the metadata extracting unit 200. For example, after reflecting the sound metadata according to Tables 1 and 2 described above, the playback setting data of Table 4 may be updated as follows.

frequency 20hz-60hz 60hz-350hz 350hz-800hz 800hz-2khz 2khz-5khz 5khz-7khz 7khz-20khz Current setting value 0 0 0 0 0 0 0 Acoustic metadata 1 -7 -10 -5 -One 0 0 0 Acoustic Metadata 2 0 +2 +1 0 -One -2 -5 Metadata sum -7 -8 -4 -One -One -2 -5 Update setting value +7 +8 +4 +1 +1 +2 +5

The analysis unit 300 may cancel the sound metadata according to Tables 1 and 2 by using the weight updated from the customized playback setting data. Accordingly, the listener can listen to the sound source in the same manner as the original sound despite the environment inside and outside the vehicle and the user's hearing level. The analysis unit 300 may also update the customized playback setting data to match the listener's preferred sound setting value. . In this case, the analysis unit 300 may configure customized playback setting data so that a user can hear a sound in a desired form in consideration of a degree of change in sound according to a noise signal and a listener's hearing level for each frequency.

frequency 20hz-60hz 60hz-350hz 350hz-800hz 800hz-2khz 2khz-5khz 5khz-7khz 7khz-20khz Current setting value 0 0 0 0 0 0 0 Acoustic metadata 1 -7 -10 -5 -One 0 0 0 Acoustic Metadata 2 0 +2 +1 0 -One -2 -5 Acoustic Metadata 3 (User Preferred) 0 0 0 0 +2 +3 +3 Update setting value +7 +8 +4 +1 +3 +5 +8

As can be seen from the above-described update playback setting data, the analysis unit 300 cancels the influence of each frequency by the sound metadata 1 and the sound metadata 2, and the sound is reproduced in the same manner as the sound metadata 3, which is the listener's preferred sound setting value. You can configure the value of the update settings to be able to. Accordingly, the listener can hear the sound in the form he prefers despite the noise inside and outside the vehicle and the listener's hearing ability. The customized playback setting data provided from the analysis unit 300 may be provided in the form of a frequency filter and a volume filter. I can. The frequency filter is for amplifying or attenuating the loudness of a specific frequency band, and the volume filter may be for amplifying or attenuating the overall volume.

For example, when a sound reinforcement in a low-frequency region is required as a result of analyzing the acoustic metadata, the analysis unit 300 may set the customized reproduction setting data to include a low-pass filter. Conversely, the analysis unit 300 may set the customized reproduction setting data to include a high-frequency pass filter when sound reinforcement in the high-frequency region is required as a result of analyzing the acoustic metadata. The specific types of the low-pass filter and the high-pass filter described above may be set in consideration of acoustic metadata as shown in Table 5 or Table 6 above.

In reflecting the sound metadata, the analysis unit 300 may apply weights to each sound metadata. For example, when the listener's hearing level and the noise signal conflict by giving a relatively high weight to the listener's hearing level and a relatively low weight to the noise signal, the customized playback setting data is updated in a direction that complements the user's hearing level. can do.

The customized playback setting data updated by the analysis unit 300 is transmitted to the playback unit 400.

The reproduction unit 400 is an area that processes sound source data and transmits sound to an external speaker. Accordingly, the reproduction unit 400 may perform a process of converting the sound source data into a voice signal current. In this case, in changing and processing the sound source data into a voice signal current, the customized playback setting data received from the analysis unit 300 may be considered. Specifically, at least one of frequency data and volume data of sound source data may be changed according to customized playback setting data.

Accordingly, from the reproducing unit 400, a customized sound may be reproduced in consideration of the surrounding environment and according to user preference.

According to an embodiment of the present invention, a sound tailored to a listener may be reproduced in consideration of an environment inside and outside a vehicle, a user's hearing level, and the like. Accordingly, it is possible to increase the user's listening satisfaction.

In the above, the basic configuration of a sound source reproducing apparatus for reproducing a sound tailored to a listener has been described. The sound source reproducing apparatus may further include an additional component to reproduce a customized sound.

2 is a block diagram showing a sound source reproducing apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the input unit 100 may include a recording module 110 and a wireless communication module 120, and the analysis unit 300 may include an equalizer 310 and a playback setting database 320.

The recording module 110 included in the input unit 100 records noise inside and outside the vehicle and generates a noise signal based on the recording. The processing method for the noise signal is as described above.

The wireless communication module 120 included in the input unit 100 wirelessly communicates with an external database. The wireless communication module 120 may receive sound data including a listener's hearing level for each frequency and a listener preferred sound setting value from an external database. In addition, the wireless communication module 120 may receive vehicle driving environment information including weather information and road environment information, and may receive related sound data from an external database according to the vehicle driving environment information.

The equalizer 310 included in the analysis unit 300 may analyze sound metadata and apply an appropriate frequency filter and a volume filter according to the result. The operation form of the equalizer 310 is as described above.

The playback setting database 320 included in the analysis unit 300 may store default playback setting data and customized playback setting data. In this case, the customized reproduction setting data may store customized reproduction setting data together with a driver ID assigned to each listener or driver. Accordingly, when the driver ID is loaded, first updated and stored customized playback setting data may be loaded. Since it is not necessary to update the playback setting data every operation, the data processing load in the analysis unit 300 can be reduced.

In the above, the configuration of the sound source reproducing apparatus has been described. Hereinafter, a method of operating the sound source reproducing apparatus having the above-described configuration will be described.

3 is a flowchart illustrating a method of operating a sound source reproducing apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the input unit first receives sound data (S100). The sound data reception may be performed in various forms, such as sound recording through a recording module and data reception through a wireless communication module.

Next, the sound data received from the input unit is extracted as sound metadata by the metadata extraction unit (S200). The acoustic metadata may include frequency data and volume data.

Next, the analysis unit updates the playback setting data into customized playback setting data by referring to the sound metadata (S300). At this time, different weights may be given to the sound metadata, and in some cases, other sound metadata may be offset and customized playback so that the sound source can be played in conformity with the sound metadata extracted from the listener's preferred sound setting value among the sound metadata. Setting data can be set. In this case, the customized playback setting data may be implemented in the form of a frequency filter and/or a volume filter.

Next, the reproduction unit processes the sound source data to implement sound (S400). In this case, the playback unit may change and process the sound source data according to the customized playback setting data.

In the above, the basic operation method of the sound source reproducing apparatus has been described. Hereinafter, another method of operating the sound source reproducing apparatus will be described in more detail.

4 is a flowchart illustrating a method of operating a sound source reproducing apparatus according to an embodiment of the present invention.

According to FIG. 4, after receiving the sound data (S100 ), the sound data transmitted to the metadata extraction unit may be classified into preference data and environment data in the metadata extraction unit (S210 ). The preference data is related to the listener's preference and may include a listener preference sound setting value and vehicle driving mode data. The environmental data is generated irrespective of the listener's preference, and may include a noise signal, a listener's hearing level for each frequency, and acoustic tuning parameters according to vehicle space and structural characteristics.

Next, the metadata extracting unit extracts frequency data and volume data from preference data and environment data, respectively (S220). In this case, different tags may be assigned to the frequency data extracted from the preference data and the frequency data extracted from the environment data. The frequency data extracted from the preference data may be tagged with the preference frequency data FD_pf, and the frequency data extracted from the environmental data may be tagged with the environmental frequency data FD_en.

Next, the analysis unit may load the playback setting data. Specifically, the reproduction setting frequency data FD_ps1 and the reproduction setting volume data VD_ps1 may be loaded.

Next, the preference frequency data FD_pf and the reproduction setting frequency data FD_ps1 may be compared (S320). Also, a first frequency filter may be determined based on the comparison result (S330). The first frequency filter may be provided in a form of attenuating or increasing a frequency of a specific band according to a user's preference.

At the same time as comparing the preference frequency data FD_pf and the reproduction setting frequency data FD_ps1 (S320), the environmental frequency data FD_en and the preference frequency data FD_pf may be compared (S340). A second frequency filter may be determined based on the comparison result (S350). The second frequency filter may be provided in a form of attenuating or increasing a frequency of a specific band so that the sound source can be reproduced according to preference by attenuating or completely conflicting with the influence of the environment.

Next, the reproduction setting frequency data may be updated by reflecting the first frequency filter and the second frequency filter (S360). Accordingly, the reproduction setting frequency data may reflect both an influence on an environment and an influence according to preferences.

Finally, the sound source data may be processed according to the updated customized playback setting data VD_ps2 (S400).

In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be embedded unless otherwise stated, excluding other components. It should not be construed as being able to further include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning in the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: sound source playback device
100: input
200: metadata extraction unit
300: analysis unit
400: regeneration unit

Claims (11)

An input unit for receiving sound data;
A metadata extracting unit for extracting sound metadata including frequency data and volume data from the sound data;
An analysis unit for loading reproduction setting data for reproducing a sound source, and updating the reproduction setting data to customized reproduction setting data according to the sound metadata; And
Including a playback unit for processing sound source data for sound source playback,
The reproduction unit changes at least one of frequency data and volume data of the sound source data according to the customized reproduction setting data,
The sound metadata is in the form of a numerical value for each band as a negative or positive value, and is data indicating which band of sound to be emphasized. The method of claim 1,
The sound metadata,
First sound metadata having a negative or positive numerical value for each band;
Second sound metadata having a negative or positive numerical value for each band and different from the first sound metadata; And
Includes an update setting value set based on the first sound metadata and the second sound metadata,
The sound source reproducing apparatus, wherein the analysis unit emphasizes the sound in the frequency band corresponding to a positive value among a plurality of frequency bands included in the update setting value. The method of claim 1,
The customized reproduction setting data includes at least one of a frequency filter for changing the frequency data and a volume filter for changing the volume data. The method of claim 3,
The analysis unit, when a result of analyzing the acoustic metadata and reinforcing sound in a low-frequency region is required, the customized reproduction setting data is configured to include a low-pass filter. The method of claim 3,
When the analysis unit analyzes the acoustic metadata and a high frequency region sound reinforcement is required, the customized reproduction setting data is configured to include a high frequency pass filter. The method of claim 1,
The acoustic data includes at least one of a noise signal collected through an input device while driving a vehicle, a listener's hearing level for each frequency, an acoustic tuning parameter according to vehicle space and structural characteristics, a listener preference sound setting value, and vehicle driving mode data. That, the sound source playback device. The method of claim 6,
The analysis unit assigns a weight to each of the noise signal, the listener's hearing degree for each frequency, the sound tuning parameter, the listener's preferred sound setting value, and the vehicle driving mode data,
The sound source reproducing apparatus for updating the reproduction setting data to customized reproduction setting data according to the sound metadata to which the weight is assigned. The method of claim 6,
The analysis unit cancels the noise signal, the listener's hearing level for each frequency, and the frequency data analyzed according to the sound tuning parameter, and the customized reproduction setting data so that the sound source data can be reproduced according to the listener's preferred sound setting value. To update, sound source playback device. The method of claim 1,
The input unit includes a wireless communication module,
The wireless communication module receives the sound data including a listener's frequency-specific hearing level and a listener's preferred sound setting value from an external database through wireless communication. The method of claim 9,
The input unit receives vehicle driving environment information including weather information and road environment information,
A sound source reproducing apparatus for receiving the related sound data from the external database according to the received vehicle driving environment information. The method of claim 1,
The analysis unit assigns a driver ID to each driver driving the vehicle,
A sound source reproducing apparatus that matches and stores the driver ID and the customized reproduction setting data.

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