JP2013039357A - Video data for golf practice, video reproduction device, and method of generating audio data for golf practice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide video data to be used for learning the rhythm of a golf swing motion more accurately.SOLUTION: The video data contains a video image of a golf swing motion, and music sound consisting of a melody part and a rhythm part. The sound of the rhythm part in the music is synchronized with each of a plurality of features in the swing motion.

Description

  The present invention relates to video data used for golf practice, a video playback device that plays back the video data, and a method for generating audio data included in the video data.

  In golf, it is important to perform a swing motion at a constant rhythm suitable for individual players. As a practice method for acquiring such a swing motion at a constant rhythm, a method using a metronome is known. In this method, the player performs a swing motion in accordance with the sound that the metronome sounds at regular intervals.

  The swing motion starts from a back swing that pulls the club backward, and is composed of a series of operations such as a down swing that lowers the club, an impact that the club head hits the ball, and a follow-through that swings the club after impact. The individual operations constituting the swing operation are not necessarily performed at the same time interval. Specifically, for example, the backswing and the downswing are not performed in the same time, and the downswing is performed quickly in a shorter time. For this reason, even if you try to perform a swing operation in time with a metronome that sounds at regular time intervals, it is difficult to be aware of the characteristic timing included in a series of swing operations, especially the timing of impact, and the timing of the sound that the metronome sounds It is impossible to match. In addition, it is difficult for humans to memorize the interval between the sounds of the metronome. Therefore, even if you can swing with a certain rhythm when practicing while playing the metronome, you can swing with the rhythm when practicing while playing the metronome. It is not easy to reproduce.

  The present invention has been made in consideration of the above circumstances, and one of its purposes is video data that can be used for practice to acquire a swing motion rhythm more accurately in golf, The present invention relates to a video playback device that plays back video data, and a method for generating audio data included in the video data.

  The video data according to the present invention is video data including a moving image of a golf swing motion and a sound of music composed of a melody part and a rhythm part, and a plurality of characteristic timings during the swing motion. The timing at which the rhythm part sounds in the music is synchronized with each other. The moving image may be a moving image of a swing motion of putting.

  The video reproduction apparatus according to the present invention is video data including a moving image of a golf swing motion and a sound of music composed of a melody part and a rhythm part, and a plurality of characteristic timings during the swing motion. Each of which includes means for storing video data in which the timing of the sound of the rhythm part in the music is synchronized, and means for reproducing the video data.

  The audio data generation method according to the present invention includes a step of acquiring a moving image of a golf swing motion, a step of specifying a plurality of characteristic timings in the acquired moving image, and the plurality of specified timings Generating sound data of music that synchronizes the timing at which the sound of the rhythm part is sounded.

It is a figure which shows the 1st example of the correspondence of a swing operation | movement and a music. It is a figure which shows the 2nd example of the correspondence of a swing operation | movement and a music. It is a figure which shows the 3rd example of the correspondence of a swing operation | movement and a music. It is a figure which shows the 4th example of the correspondence of a swing operation | movement and a music. It is a flowchart which shows the production | generation procedure of the video data which concerns on this embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The video data according to the present embodiment is obtained by synthesizing moving image data obtained by imaging a player performing a golf swing motion with a video camera and audio data of a music prepared in accordance with the rhythm of the swing motion. can get. In this video data, the characteristic timing included in the swing motion is synchronized with the timing at which sound is played in the music. Therefore, the player can intuitively understand the rhythm with which the player should swing by viewing this video data. Then, when the player practices the swing motion, the player can swing at the same rhythm as the swing motion in the video data by listening to the sound data of the music and swinging according to the rhythm of the music. .

  Specifically, the characteristic timing that the player is likely to be aware of during the swing motion includes the start time of the back swing (that is, the start time of the swing motion), the time of switching from the back swing to the down swing called the top swing, and There is a point of impact when the club head hits the ball. In the following, the start time of the backswing is expressed as a start timing t1, the switching time from the backswing to the downswing is expressed as a top timing t2, and the impact time is expressed as an impact timing t3. Further, the required time from the start timing t1 to the top timing t2 is expressed as a backswing time T1, and the required time from the top timing t2 to the impact timing t3 is expressed as a downswing time T2. In the backswing time T1 and the downswing time T2, the backswing time T1 is longer than the downswing time T2. Moreover, the backswing time T1 is not always a simple integer multiple of the downswing time T2. For this reason, when using a conventional metronome that simply sounds at regular intervals, it is difficult to set the time interval of the metronome so that sound is produced at all of the start timing t1, the top timing t2, and the impact timing t3. Of course, if the metronome is sounded at short time intervals, the sound may be sounded at any of timings t1, t2, and t3. However, in that case, the number of times that the sound is generated is increased regardless of the swing operation during the elapse of the backswing time T1 and the downswing time T2, and it is difficult to perform the swing operation according to the sound of the metronome.

  In view of this, in the video data according to the present embodiment, the music that produces the sound of the rhythm part (especially the sound with accents) is reproduced along with the moving image of the swing operation in accordance with such characteristic timing during the swing operation. Specifically, this music includes a melody part and a rhythm part, and the sounds of musical instruments (for example, percussion instruments such as bass drums and snare drums) constituting the rhythm part are the start timing t1 and the top timing t2 in the moving image. , And the impact timing t3. FIG. 1 is a diagram showing an example of a correspondence relationship between a swing motion in a moving image and a music piece, and the process of the swing motion in the moving image is shown in the uppermost stage, and the melody constituting the music piece underneath, The score of each part of the bass and drum is shown in order. Further, in the “Rhythm / Accent” column below the score, a speech waveform representing the sound (accent) of the rhythm part that sounds at the timings t1, t2, and t3 is shown. In the lowermost column “Conventional Metronome”, for comparison with the music in this embodiment, a speech waveform when the conventional metronome is played in accordance with the swing motion is shown.

  In the example of FIG. 1, the music has a two-quarter beat, and two quarter notes are included in one measure. The start timing t1 coincides with the first beat of the first measure, and the top timing t2 coincides with the first beat of the second measure. Further, in the swing operation in the example of this figure, the ratio of the backswing time T1 and the downswing time T2 is about 4: 1, the backswing time T1 is equivalent to two quarter notes, and the downswing time T2 is Each corresponds to one eighth note. Therefore, the impact timing t3 does not coincide with the second beat of the second measure, and coincides with the back of the first beat (second eighth note counted from the beginning of the second measure). Therefore, in the example of this figure, there is a rhythm part accent on the front and back of the first beat of the first measure and the first beat of the second measure. In this way, the characteristic timing during the swing motion and the timing at which the rhythm part sounds in the music are synchronized, so the player can watch the video and see what It is possible to clearly grasp whether or not to perform a swing motion with a rhythm. On the other hand, as shown in the lowermost part of FIG. 1, when using the conventional metronome, the sound is generated at a constant interval. Therefore, when the sound interval is set so as to coincide with the start timing t1 and the top timing t2, No sound can be produced at impact timing t3. Therefore, even if the swing operation is practiced while listening to the sound of the metronome, it is difficult to perform the swing operation in consideration of the impact timing t3.

  Furthermore, the audio included in the video data is not simply composed of the drum sound that is played at a specific timing during the swing operation. That is, the audio in the video data is a tune that includes a rhythm part that includes drum sounds that are played at timings t1, t2, and t3, and a melody part that is played along with the rhythm. In general, a song with a melody is more likely to remain in a person's memory than a percussion instrument that sounds at a specific rhythm. Moreover, it is difficult to simply store the tempo of a metronome that sounds at regular intervals, but the tempo of a song with a melody can be stored with relatively high accuracy. Therefore, a player who has watched the video data according to the present embodiment and practiced the swing motion according to the music included in the video data cannot perform the swing motion while viewing the music or video, for example, during the actual round. Even in such a case, it is possible to swing at the same rhythm as the swing motion in the video data by swinging while imagining the music in the head.

  Note that in FIG. 1, only two bars of music corresponding to one swing motion are shown, but in actuality, the music itself needs to start before the swing motion starts. Otherwise, the player cannot determine at what timing in the music the swing operation should be started.

  Further, the video data according to the present embodiment may be obtained by repeating a video obtained by synchronizing such a swing motion and music a plurality of times. Usually, a rhythm part of a music is a rhythm pattern having the same structure that is repeated at regular intervals. Therefore, by synchronizing the moving image of the swing operation with each of the rhythm patterns appearing multiple times in such music, the video data is reproduced so as to reproduce the moving image of the multiple swing operations while reproducing one music. Can be configured. At this time, with respect to the melody part, it is not always necessary to synchronize the same melody with respect to each of a plurality of swing operations. This is because the timing of the swing motion only needs to match the timing of the accent of the rhythm part. Therefore, the melody changes with the progress of the music, and during that time, the music data in which the rhythm pattern synchronized with the swing motion appears multiple times is prepared, so that the video data including only one swing motion is repeated. Compared to the case, it is possible to generate video data that is less tired for the user and easier to store the rhythm pattern. In addition, a moving image of a plurality of swing motions in the video data may appear at a certain time interval (for example, at a time interval assumed to be required to tee up and address the ball during practice). . In this way, it becomes easy to practice the swing motion according to the music in the video data.

  Although FIG. 1 shows a specific example of music in the case where the ratio of the backswing time T1 and the downswing time T2 is 4: 1, the ideal rhythm pattern of the swing motion differs depending on the person, and such 4: In some cases, it is desired to perform the swing motion with a rhythm pattern having a ratio different from the ratio of 1. 2 and 3 show specific examples in the case where music is synchronized with a moving image of a swing operation having a rhythm pattern different from that in FIG.

  Specifically, in the example of FIG. 2, the ratio of the backswing time T1 and the downswing time T2 is 8: 3, the backswing time T1 is eight 16th notes, and the downswing time T2 is 16 minutes. Each corresponds to three notes. Accordingly, the rhythm part of the music has accents corresponding to the start timing t1 and the top timing t2 of the swing operation on the first beat of the first measure and the first beat of the second measure, respectively, as in FIG. ing. On the other hand, unlike FIG. 1, in the example of FIG. 2, the first beat of the second measure is divided into four (ie, the fourth 16th note counted from the beginning of the second measure). There is an accent, and this timing corresponds to the impact timing t3 of the swing motion.

  In the example of FIG. 3, the ratio of the backswing time T1 and the downswing time T2 is 3: 1, the backswing time T1 is two quarter notes, and the downswing time T2 is one quarter note. This corresponds to two triplets divided into three. Therefore, the music in this example is the rhythm part corresponding to the start timing t1 and the top timing t2 of the swing operation on the first beat of the first measure and the first beat of the second measure, respectively, as in FIGS. Have an accent. On the other hand, there is also an accent in the timing of the third of the first beat of the second measure divided into three (that is, the third triplet counted from the beginning of the second measure). This corresponds to the impact timing t3.

  By using such video data shown in FIG. 2 or FIG. 3, the player can also learn a swing operation with a rhythm pattern different from that shown in FIG.

  2 is assumed to be the same as the backswing time T1 in the example of FIG. 1 (in this case, the tempo of the music in the example of FIG. 1 and the tempo of the music in the example of FIG. 2) ), The downswing time T2 of both is only shifted by one 16th note. Here, for example, assume that the tempo of the music is 120 bpm, that is, the speed of 120 quarter notes per minute. In this case, since one quarter note is 0.5 seconds, one sixteenth note corresponds to 0.125 seconds. Normally, it is difficult for a general person to accurately recognize such a slight time lag only by looking at a moving image of a swing motion. However, most people can recognize the difference between the lengths of eighth notes and sixteenth notes in the music. Similarly, the timing of the third triplet corresponding to the impact timing t3 in FIG. 3 is also slightly different from the timing of the impact timing t3 shown in FIGS. 1 and 2, but the rhythm in the music is It is clearly different, and ordinary people can tell the difference. Therefore, by selecting the rhythm of the music that suits you from among the multiple types of music as shown in FIGS. 1 to 3 and performing a swing motion in accordance with the rhythm, This makes it possible to perform a swing operation at a constant rhythm in accordance with a subtle timing that is difficult to discriminate.

  In addition, the video data according to the present embodiment may be generated using moving image data obtained by capturing a player performing a putting swing motion with a video camera. By practicing using such video data, the player can perform putting swing motion at a constant rhythm.

  FIG. 4 shows a specific example when the music is synchronized with the moving image of the putting swing motion. In the example of this figure, the ratio of the backswing time T1 and the downswing time T2 is 2: 1, the backswing time T1 is two eighth notes, and the downswing time T2 is one eighth note. Respectively. Accordingly, the rhythm part of the music has accents corresponding to the start timing t1, the top timing t2, and the impact timing t3 of the swing operation on the first beat, the third beat, and the fourth beat of the first bar, respectively. Yes. The rhythm pattern of FIG. 4 is suitable not only for putting but also for short games such as approach shots (shots with a relatively short hit distance). Further, depending on the player, not only a short game but also a full swing shot may be practiced with the rhythm pattern of FIG.

When creating video data including a moving image of a swing motion in putting using the rhythm pattern of FIG. 4, the tempo of the music is 98 bpm to 110 bpm, that is, the speed of 98 to 110 quarter notes per minute. It is desirable that the speed be 104 bpm, that is, a speed corresponding to 104 quarter notes per minute. This is due to the following reason. That is, in putting, it is desirable that the player perform the swing motion at a speed as if the pendulum is swinging, rather than intentionally adjusting the swing speed. Here, when the putter head is regarded as the weight of the pendulum, the length of the pendulum is the sum of the length of the putter and the length of the arm. When the sum of the length of the putter and the length of the arm is x, the value is typically about 1.3 m although there are individual differences depending on the physique of the player. This is the formula for calculating the pendulum period when the amplitude is small
If applied, the pendulum period T can be calculated. Note that 9.8 in the above equation is the gravitational acceleration. In the case of putting, the backswing operation corresponds to a quarter of one period of the reciprocating motion of the pendulum, and in the rhythm pattern of FIG. 4, this time is one quarter note. From here, assuming that the tempo of the music (number of quarter notes per minute) is y, y = 60 / (T / 4). When x = 1.3 is applied to the above equation, y = It can be calculated as about 104. Furthermore, considering that there are individual differences in arm length and the like, it is considered that a tempo of 98 bpm or more and 110 bpm or less, which is a range of ± 5% around the above value, is suitable as a music for putting practice. . The result of the analysis of the speed of the swing motion of a player who is actually active as a professional also confirms that the above tempo is appropriate.

  Hereinafter, an example of the video data generation procedure described above will be described with reference to the flowchart of FIG. First, moving image data obtained by capturing an image of the player performing a swing motion with a video camera or the like is acquired (S1).

  Next, the start timing t1, the top timing t2, and the impact timing t3 are specified from the acquired moving images. More specifically, it identifies which frame image (key frame image) corresponds to these timings (S2). Then, each of the backswing time T1 and the downswing time T2 is measured by counting the frame images included between these key frame images (S3). As a specific example, when a moving image is captured at 30 fps, one frame corresponds to 1/30 second. Therefore, if the number of frames from the start timing t1 to the top timing t2 is 20, the backswing time T1 is 2/3 seconds. The downswing time T2 can be counted in the same manner.

  After measuring the backswing time T1, the tempo of the music is determined using this time (S4). Further, the rhythm pattern of the swing motion is determined using the ratio of the backswing time T1 and the downswing time T2 (S5). Then, a song having the tempo and rhythm pattern determined in S4 and S5 is prepared (S6). Such a song may be generated by newly composing in accordance with the tempo and rhythm pattern determined in S4 and S5, or a song that meets the conditions may be selected from existing songs. .

  Finally, the music prepared in S6 is synthesized with the moving image acquired in S1 so that the accent of the rhythm part is synchronized with each timing during the swing motion, and video data is generated (S7). This video data may be generated according to various standards such as MPEG-4.

  The video data generated in this manner may be provided by being stored in a video storage medium such as a DVD, or provided to the user by distribution (download distribution or streaming distribution) via a communication network such as the Internet. May be. Alternatively, it may be provided to the user in a state in which it is stored in advance in a video playback device such as a portable video player. Further, this video data may be provided to the user as a set together with audio data of music included in the video data. In this way, after viewing the video data, the user grasps the correspondence between the music and the swing motion, and then listens to the audio data provided together with a music playback device such as an MP3 player, You can practice swinging according to the rhythm pattern.

  In addition to the rhythm pattern differences described above with reference to FIGS. 1 to 4, the ideal tempo of the entire swing operation varies from person to person. If the tempo of the swing motion is different, it is also necessary to change the tempo of the music to be synchronized with the swing motion. That is, the music suitable for the user to practice the swing motion is determined by a combination of a plurality of rhythm patterns and a plurality of tempos. Therefore, video data as described above may be prepared for each of a plurality of combinations of a plurality of rhythm patterns and a plurality of tempos, and provided to the user as a set. In this way, the user can select music that suits his / her swing from various tempos and rhythm patterns, and practice the swing motion using the music.

  In the above description, the three timings of the start timing t1, the top timing t2, and the impact timing t3 are set as characteristic timings of the swing operation. However, in accordance with other timings (for example, timing to finish the follow-through). The music that sounds can be combined with the moving image of the swing motion. In the above description, the start timing t1 and the top timing t2 coincide with the first beat of one measure. However, the method is not limited to such synchronization, and the start timing t1 is, for example, one measure in four quarters. You may adjust to the 3rd beat.

  t1 start timing, t2 top timing, t3 impact timing.

Claims (4)

A golf swing motion video,
The sound of a song composed of a melody part and a rhythm part,
Including video data,
Video data, wherein the timing of the sound of the rhythm part in the music is synchronized with each of a plurality of characteristic timings during the swing operation. The video data according to claim 1, wherein the moving image is a moving image of a swing motion of putting. A video data including a moving image of a golf swing motion, and a sound of a music composed of a melody part and a rhythm part, and each of a plurality of characteristic timings during the swing motion Means for storing video data in which the timing of the sound of the rhythm part is synchronized,
Means for reproducing the video data;
A video reproducing apparatus comprising: Obtaining a moving image of golf swing motion;
Identifying a plurality of characteristic timings in the acquired moving image;
Generating audio data of the music so that the timing of the sound of the rhythm part is synchronized with each of the plurality of identified timings;
A method for generating audio data, comprising: