KR20140120805A - File structure of engine sound and Method for playing file thereof - Google Patents

Abstract

The present invention discloses a file structure of an engine sound and a method for playing a file thereof. According to the present invention, the file structure of the engine sound comprises: at least one engine sound data for each section expressing a virtual engine sound corresponding to each section of the number of rotations of a motor in a file structure of a virtual engine sound, wherein the engine sound data for each section is made up of one file designated such that the engine sound data is played corresponding to each section of the number of rotations of the motor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine sound file structure,

The present invention relates to an engine sound file structure and a method for reproducing the file, and more particularly, to a structure and method for reproducing an engine sound file structure, To an engine sound file structure capable of repeatedly reproducing the engine sound of the corresponding section and a method of reproducing the engine sound file structure.

This application claims priority to Korean Patent Application No. 10-2013-0036330, filed on April 3, 2013, and Korean Patent Application No. 10-2013-0069390, filed on June 18, 2013, The disclosure of which is incorporated herein by reference in its entirety.

In eco-friendly cars, especially electric cars, there is almost no noise when driving, so drivers often need to sound their horns when they meet pedestrians, and pedestrians should always be careful because they often do not know when a car is coming. At this time, it can be a good way to hear the engine sounds familiar to these eco-friendly cars. However, in the conventional engine noise of the internal combustion engine, the sound greatly changes according to the running speed or the engine speed. Therefore, there is a problem in that it is difficult to accurately grasp the running state of the vehicle if the engine sound is continuously generated in one section.

1, a conventional apparatus for generating an engine sound includes a control unit 10, a sound generating unit 20, a speaker 30, a memory 40, an external interface (50), each of which comprises a memory (40) for storing engine sound data or a file for each section of the engine speed or the vehicle speed, and a memory A control unit 10 for transmitting engine sound data or files from the memory 40 to the sound generator 20 and a sound generator 20 for receiving data or files from the controller 10, And a speaker 30 for outputting an engine sound of the sound generator 20. The engine sound used at this time uses several sound files corresponding to the number of revolutions of the motor as shown in Table 1 below , Each sound file has a corresponding engine RPM for MP3 The file is created and used.

engine RPM Sound file Motor speed 800 RPM800.MP3 0 900 RPM900.MP3 250 1000 RPM1000.MP3 500 1100 RPM1100.MP3 750 1200 RPM1200.MP3 1000 1300 RPM1300.MP3 1300 1400 RPM1400.MP3 1400 1500 RPM1500.MP3 1500 1600 RPM1600.MP3 1600 1700 RPM1700.MP3 1700 1800 RPM1800.MP3 1800 1900 RPM1900.MP3 1900 2000 RPM2000.MP3 2000 2500 RPM2100.MP3 2500 3000 RPM2200.MP3 3000 3500 RPM2300.MP3 3500 4000 RPM2400.MP3 4000 4500 RPM2500.MP3 4500 5000 RPM2600.MP3 5000

In the example of Table 1, "800", which is the lowest value of the engine RPM, generally means rotation at the idling level, and the number of revolutions of the motor at this time becomes '0'. In this situation, the number of motor revolutions is usually '0' when the power is turned on by the power ON detection signal. However, there is a problem in that it is difficult to manage the engine sounds by dividing them into dozens of files and storing them. In addition, it takes a long time to find and read dozens of files, which can interfere with generating a natural engine sound.

The present invention has been made in order to solve the problems of the conventional art as described above, and it is an object of the present invention to provide an engine sound generator for a motor vehicle, An engine sound file structure for facilitating storage, transmission and management of the engine sound file and generating a natural engine sound by allowing the engine sound to jump to a position in the corresponding file according to the input, The present invention has been made in view of the above problems.

According to another aspect of the present invention, there is provided a structure of a virtual engine sound file, the engine sound file structure including at least one engine sound data for each section, And the engine sound data of the section is designated to be reproducible in correspondence with the intervals of the motor revolution number, and is made up of one file.

Preferably, a header portion having information of at least any one of the size of the motor revolution number, the section of the motor revolution number, the type of the vehicle, the model name of the vehicle, the number of section engine sound data, .

According to another aspect of the present invention, there is provided a method for reproducing an engine sound file, the method comprising the steps of: Wherein the engine sound data of each section is designated to be reproducible in correspondence with each section of the motor revolution number to use an engine sound file composed of one file, And the control unit plays back corresponding engine sound data for each section according to the sensed motor revolution number.

Preferably, the control unit repeatedly plays engine sound data of each section corresponding to the number of revolutions of the motor while the number of revolutions of the motor is maintained.

Preferably, the control unit is configured to select one of FF, Rew, or Jump to reproduce the engine sound data of each section corresponding to the changed motor rotation speed according to the change of the motor rotation speed And performs an operation.

Preferably, at least two or more engine sound files are used, and the controller may toggle the two or more engine sound files to reproduce the engine sound data for each section corresponding to the changed motor rotation speed in accordance with the change in the motor rotation speed (toggle play).

Preferably, the controller performs an operation of increasing the playback speed of the engine sound data for each section in accordance with the increase in the number of revolutions of the motor.

Another technical object of the present invention is achieved by a program for executing the above-described method for reproducing engine sound files or a readable recording medium on which engine sound data for each section is recorded.

According to the present invention, engine sound files can be constructed with one file or a minimum number of files in generating an engine sound of a low-noise eco-friendly automobile. Therefore, it is easy to store, deliver, and manage engine sound files, Since the speed at which a single file or a small number of files are read is much faster than the speed at which the data is read from the medium one by one, the time loss due to the switching and reproduction at each section can be minimized, and a natural engine sound can be generated.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
FIG. 1 is a block diagram schematically showing a configuration of a generator for generating a conventional engine sound.
2 is a diagram illustrating the structure of a segment engine sound file according to the present invention.
3 is a view for explaining an operation of using an interval engine sound file according to the first embodiment of the present invention.
4 is a view for explaining an operation of using an interval engine sound file according to the second embodiment of the present invention.
5 is a view for explaining an operation of using an interval engine sound file according to the third embodiment of the present invention.
6 is a view for explaining an operation of using an interval engine sound file according to the fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

An object of the present invention is to create and use engine sound in a low-noise electric vehicle, in which dozens of sound files are conventionally used as one file.

Here, the characteristic of the engine sound is that it is difficult for a person to distinguish the difference even if the sound for a predetermined time is stored as a file and repeatedly used because a certain sound is generated in a predetermined engine RPM interval. If you create dozens of sound files as a single file, you can reduce the size of the file as compared to dozens of sound files. Of course, in the case of the engine sound, the characteristics may be different for each type of vehicle, so it is preferable to find the optimal time by changing the time of the section or the like for each type of vehicle.

In the present invention, engine noise is artificially generated in a low-noise electric vehicle. In the conventional art, engine sounds generated in an internal combustion engine are divided into sections, and engine sounds for each section are separately divided into dozens of files The engine sound is divided into a plurality of sections, and each engine sound is divided into a single file or a minimum number of files. The engine sound is jumped to a position in the corresponding file according to the input of the motor revolution number of the electric vehicle, It is easy to store, transmit and manage the sound file, and it is possible to generate a more natural engine sound.

That is, the structure of the engine sound file according to the present invention includes at least one engine sound data for each section in which a virtual engine sound corresponding to each section of the motor revolution number of the electric vehicle is expressed, And may be made up of one file so as to be reproducible corresponding to the intervals of the motor revolution number.

For example, engine sounds according to the present invention can be made into one sound file as shown in Table 2 below.

engine RPM Vehicle _ engine sound. MP3 Motor speed 800 1st segment engine sound 0 900 2nd segment engine sound 250 1000 3rd segment engine sound 500 1100 4th engine sound 750 1200 5th engine sound 1000 1300 6th engine sound 1300 1400 7th section engine sound 1400 1500 Eighth section engine sound 1500 1600 9th engine sound 1600 1700 10th engine sound 1700 1800 11th engine sound 1800 1900 12th engine sound 1900 2000 Engine sound of the 13th section 2000 2500 Engine sound of the 14th section 2500 3000 15th engine sound 3000 3500 16th section engine sound 3500 4000 17th section engine sound 4000 4500 18th engine sound 4500 5000 19th section engine sound 5000

In Table 2, engine sounds for a specific vehicle type are recorded according to intervals of the engine RPM, and engine sounds for each section are generated by a predetermined rule into a file "vehicle_mp3 .mp3" can do.

FIG. 2 shows the structure of a section engine sound file according to the present invention. For example, the beginning and end of a file "vehicle_ engine sound .mp3" And the "first section engine sound" is arranged at the beginning. The interval engine sound may maintain a predetermined time or length, and a margin may be inserted between the intervals.

In FIG. 2, "1" represents "first section engine sound" and "2" represents "second section engine sound". The time or length axis represents a collection of interval engine sounds as a time axis or a length axis, and individual intervals such as '1', '2', '3', and the like are optimum for repeated engine sound reproduction Which is the minimum time or length required to generate the sound of the sound.

Configuration item Contents 1st segment engine sound 2.9 sec 2nd segment engine sound 2.9 sec 3rd segment engine sound 2.9 sec ........ ........ n-1 th segment engine sound 2.9 sec nth section engine sound 2.9 sec

In Table 3, the length (or the interval) of the section engine sounds is set to 3 sec, and the effective length of each engine sound, that is, the reproduction time is 2.9 sec, which is preferably determined according to circumstances . At this time, the length (or interval) value may be included in the file name as a method of indicating the length of the interval engine sound. That is, when using the file name "vehicle_signal_3sec.mp3", the control unit can designate the number between "engine sound_" and "sec" as intervals of the interval engine sound when reading the file name . Further, the file name may further include the effective length of section engine sound as "vehicle type_engine sound_3sec_2.9sec.mp3 ".

In other words, the file format of the above-mentioned "vehicle_ engine sound_3sec_2.9sec.mp3" has the header information of mp3 as mp3, and the engine sound of each section is concatenated into a single mp3 file. The format usable in the present invention is not limited to mp3 files, but files of other audio and video formats can be used, and it is preferable that the length or the effective length of section engine sounds included in the file names or file names can be changed for convenience.

Although not shown in FIG. 2, a header portion exists at the beginning of most of the files, and information such as specifications, types and detailed descriptions of the files are specified. By adding a header portion to the engine sound file of the present invention, it is possible to define in detail the engine sound of a vehicle, the time and length of each individual section, how many sections are generated, and how to reproduce And it is possible to use the engine sound file more accurately by referring to this header portion later.

That is, in the header, the number of segments of the engine sound data, the number of segments of engine sound data, the type of the vehicle, the model name of the vehicle, the number of the engine sound data, Time, length, etc., and in actual use, the item can be added or deleted depending on the situation. When the header and the interval engine sound are included, the configuration of the file can be as shown in Table 4 below.

Configuration item Contents File Type riff File Size 10 MByte File Format wave Channel 2 channel Sample Rate 44100 hz Size of motor revolution 6000 Section of motor revolution number 10 Type of vehicle car Model name of the vehicle Kia Motors Number of interval engine sounds nth Length of section engine sound 3 sec 1st segment engine sound 2.9 sec 2nd segment engine sound 2.9 sec 3rd segment engine sound 2.9 sec ........ ........ n-1 th segment engine sound 2.9 sec nth section engine sound 2.9 sec

In Table 4, the length of the configuration item is omitted. The content of the File Type is riff, which is a data format created by Microsoft. Thus, it is desirable that the present invention should create a new name because it is necessary to define a new format.

Therefore, the engine sound file of the present invention can be composed of the header portion and at least one segment engine sound data. In addition to being located at the beginning or the end of the file, the header portion may be used both at the beginning and at the end of the file. In addition, the existence of the header, the location of use, It is preferable to use it properly.

FIG. 3 is a view for explaining an operation of using the section engine sound file according to the first embodiment of the present invention. For example, a "vehicle_ engine sound .mp3" When reaching the end of the interval, the rewind (Rew) is operated to repeat and play the "1st section engine sound" again. This is continuously performed while the number of revolutions of the motor corresponding to the "1st section engine sound" is maintained, and natural engine sounds are generated by the repetitive reproduction operation. When the necessity of the variation of the engine sound of the section occurs in accordance with the change of the motor revolution number, the FF is operated to reproduce the "second section engine sound" And the rewinding (Rew) are repeatedly performed. Continuously, it leads to "3rd section engine sound", "4th section engine sound", ... "nth section engine sound".

FIG. 4 is a diagram for explaining an operation of using an interval engine sound file according to a second embodiment of the present invention. In FIG. 4, the section engine sound is reproduced sequentially due to a sudden change in the number of revolutions of the motor It is possible to reproduce the segment engine sound at a certain position. Since the number of revolutions of the motor is increased at the same time as the start of the reproduction, the FF is operated to reproduce the "2nd section engine sound ", so that the repetition of the play and rewind Action is taken.

Further, due to a sudden increase in the number of revolutions of the motor, a fast forward (FF) operation is performed to reproduce the "fifth section engine sound ", so that the play and rewind Is performed. (FF) can be executed several times when seeking a necessary section to the rear of the current section engine sound, and when it is desired to move to an arbitrary section regardless of the front or rear, the position of the section to be moved is designated, It is possible to simply find a necessary section.

Although not shown in FIG. 4, the operation of the rewinding (Rew) can be shifted from moving the position of the section engine sound to the beginning of any other section engine sound position in front. This is accomplished simply by repeating the operation of rewinding several times. The ability to quickly navigate to such a desired segment location is very easy for a digital product and can be easily moved to a desired location.

FIG. 5 is a diagram for explaining an operation of using an interval engine sound file according to the third embodiment of the present invention. In this case, at least two engine sound files are used. The engine sound files at this time may be the same file or different files. As shown in Fig. 5, in a situation where the number of revolutions of the motor is continuously increased, for example, the " first engine engine sound "of the" car model_ engine sound_1.mp3 " ) When reaching the end of the section, rewind to "Repeat and play the first section engine sound" again and then toggle the file "Vehicle_ engine sound_2.mp3" (lower part in the drawing) toggle ") to perform repetitive operations of" play "and" rewind "with respect to the" second interval engine sound ". And then repeats the play and rewind of the "fourth section engine sound " by toggling the file of the" vehicle type_ engine sound_1.mp3 " It is possible to perform a reproducing operation by toggling between the two engine sound files. This allows to reduce the preparation time for storing the data in the buffer or to reproduce engine sounds in various driving methods.

FIG. 6 is a view for explaining an operation of using the section engine sound file according to the fourth embodiment of the present invention. In the situation where the number of motor revolutions is continuously increased, And the operation to increase the playback speed of the section engine sound according to the increase of the number of revolutions is performed. This increases the playback speed of the interval engine sound, so that it is possible to effectively implement a wide engine sound even with a smaller interval engine sound, thereby reducing the number of interval engine sounds.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

Play: Play Rew: Rewind
FF: fast forward RPM: motor speed

Claims (10)

In the structure of a virtual engine sound file,
And at least one engine sound data for each section in which a corresponding virtual engine sound is expressed for each section of the motor revolution number,
Wherein engine sound data for each section is designated to be reproducible in correspondence with each section of the motor revolution number. The method according to claim 1,
Wherein the engine sound file includes at least one engine sound data of at least one section as one file. The method according to claim 1,
Information of at least any one of the size of the motor revolution number, the section of the motor revolution number, the type of the vehicle, the model name of the vehicle, the number of section engine sound data, and the time or length of the section engine sound data is included in the header part, And the engine sound file structure. A method for reproducing a virtual engine sound,
The control unit senses the number of revolutions of the motor and reproduces at least one engine sound data for each interval in which a virtual engine sound corresponding to each interval of the motor revolution is expressed,
The engine sound file designated by the interval engine sound data is reproducible in correspondence with the interval of the motor revolution number,
Wherein the control unit plays back the corresponding engine sound data according to the sensed motor revolution number. 5. The method of claim 4,
Wherein the engine sound file includes at least one engine sound data of at least one section as one file. 5. The method of claim 4,
Wherein the control unit repeatedly plays engine sound data of each section corresponding to the number of revolutions of the motor while the motor rotation speed is maintained. 5. The method of claim 4,
The controller may perform one of FF, Rew, or Jump to reproduce the engine sound data corresponding to the changed motor rotation speed according to the change of the motor rotation speed The engine sound file is reproduced. 5. The method of claim 4,
At least two or more engine sound files are used,
Wherein the controller performs an operation of toggling two or more engine sound files to reproduce the engine sound data of each section corresponding to the changed motor rotation speed in accordance with the change of the motor rotation speed A method of reproducing a sound file. 5. The method of claim 4,
Wherein the control unit performs an operation of increasing the playback speed of the engine sound data for each section in accordance with the increase in the number of revolutions of the motor. A program for executing the method according to any one of claims 4 to 9 or a readable recording medium on which engine sound data per section is recorded.

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