JP4561561B2 - Karaoke equipment - Google Patents

Description

  The present invention relates to an audio apparatus and a karaoke apparatus capable of changing keys of performance voices.

  2. Description of the Related Art Conventionally, an audio device that can change a performance voice key is widely known (see, for example, Patent Document 1). FIG. 5 is a diagram for explaining key change processing. In the key change process, a frame is cut out from the performance sound signal at predetermined time intervals. FIG. 2A is a diagram showing a cut out digital audio signal for one frame.

  A conventional audio device performs processing (dividing processing) for dividing a cut-out frame by a predetermined length. In FIG. 4A, the frame is divided at the position of the dotted line. Next, a process of resampling for each divided frame (resampling process) is performed. The sampling interval is shorter than the original audio signal sampling interval when changing to a higher key, and conversely longer than the original sampling interval when changing to a lower key.

  FIG. 4B shows the audio signal after the resampling process is performed on the audio signal shown in FIG. In this example, resampling is performed with x2 longer than the original sampling interval x1 as the sampling interval, and the key is changed to a key lower than the original key. The audio signal after being resampled in this way changes in length from the original audio signal. For example, the length of the resampled audio signal shown in FIG. 5B is longer than that of the original audio signal shown in FIG.

  In order to change the length of the resampled audio signal to the original length in this way, when changing to a higher key, the audio signal of a predetermined part in the frame is repeated by the length shortened. The audio device performs processing such as use. When the key is changed to a lower key, a process (superposition process) is performed in which the divided frames are overlapped and added and combined as shown in FIG. In this way, the length of the resampled audio signal can be returned to the original length.

The key of the performance sound can be changed by the division processing, resampling processing, and superposition processing as described above.
JP 2000-172278 A

  In the conventional audio apparatus, since the resampling process is performed, the sound signal before resampling and the frequency characteristic are changed. For example, when the key is changed in the bass direction, the peak of the frequency component moves in the bass range direction. On the other hand, when the key is changed in the high sound direction, the peak of the frequency component moves in the high sound direction. For this reason, the tone color differs from the tone color before resampling.

  Further, in the conventional audio apparatus, since the overlapping process is performed, the overlapped portions of the divided frames may be in opposite phases. In this case, after the addition and synthesis of the divided frames, the sound in the opposite phase portion disappears. This gives a sense of modulation to the listener. On the other hand, since the overlapped portions have the same phase, the level of the same phase portion may become too high after the addition synthesis. In this case, the listener will feel a double feeling.

  The problem described above becomes more prominent as the degree of key change increases. This is because the greater the degree of key change, the greater the degree of change in frequency characteristics due to resampling and the longer the overlapped portion.

  Therefore, in order to solve the above-described problems, the present invention can effectively reduce the degree of timbre change caused by key change, and can effectively reduce the degree of giving a sense of modulation and doubleness to the user. An object of the present invention is to provide an audio device and a karaoke device.

  In order to solve the above problems, the present invention employs the following means.

(1) The present invention includes a storage unit that stores karaoke song data divided for each frame, and an operation signal input unit that inputs an operation signal from an operation unit that receives an operation instructing a change in key setting of the song. And a performance means for performing a performance process for reproducing the music data stored in the storage unit and performing a key change process for changing the reproduced audio signal to a key in accordance with a change instruction received by the operation unit. The karaoke apparatus outputs the audio signal to a speaker, and the storage unit stores a plurality of pieces of music data of different keys, and when the operation unit accepts an operation of a key change instruction, the storage unit stores The music data of the key closest to the key instructed to change is selected from a plurality of stored music data, and the key change process is performed on the audio signal of the selected music data. Further comprising a performance control unit for controlling the key change processing of the play means, said performance control unit, during the playing means of the music data reproduction, when receiving an operation instruction key change in the operating unit The performance means is controlled so that the selected music data is reproduced from the next frame.

  According to the above configuration, the operation of the key change instruction is accepted by the operation unit. Here, a plurality of audio data of different keys are stored in the storage unit. The sound data of the key closest to the key for which the change instruction has been received by the operation unit is selected from the plurality of sound data stored in the storage unit by the performance control means. In the performance means, performance processing for reproducing audio data is performed. The performance processing by the performance means may be performed for all the plurality of sound data stored in the storage unit or only for the sound data selected by the performance control means.

  When the operation unit accepts the key change instruction operation, the performance control means selects the sound data of the key closest to the key instructed to change from the plurality of sound data stored in the storage unit. The Then, the key changing process of the performance means is controlled so that the key changing process is performed on the audio signal of the selected audio data. In this way, the voice data of the key closest to the key instructed to change is selected from the plurality of voice data, and the key change process is performed on the voice signal of the voice data.

  For this reason, it is possible to reduce the degree of key change from the original key of the audio signal, compared to a configuration in which the key change is always performed using the audio signal of a single audio data. As a result, the degree of timbre change due to the key change can be effectively reduced, and the degree of giving a sense of modulation and doubleness to the user can be effectively reduced.

(2) The present invention is in the aforementioned mosquito Raoke device, with one of the data of the plurality of easy song data is data of the original key of the karaoke music piece, a predetermined amount than the other data original key The karaoke apparatus is characterized in that it is music data with only a high or low key.

  According to the above configuration, in the karaoke apparatus, normally, the karaoke piece data of the original key is subjected to performance processing by the performance means (before the key is changed), and the audio signal resulting from the performance processing is input to the speaker. On the other hand, when the key change instruction is received, the karaoke piece data of the key closest to the key for which the change instruction has been made is selected by the performance control means. Then, the selected karaoke music data is reproduced by the performance means, and after the key change processing is performed on the reproduced audio signal, it is input to the speaker.

  According to the present invention, the voice data of the key closest to the key instructed to change is selected from the plurality of voice data, and the key change process is performed on the voice signal of the voice data. For this reason, the degree of key change from the original key of the audio signal can be reduced compared to a configuration in which the key change is always performed using the audio signal of a single audio data. As a result, the degree of timbre change due to the key change can be effectively reduced, and the degree of giving a sense of modulation and doubleness to the user can be effectively reduced.

  Hereinafter, an embodiment in which the present invention is applied to the karaoke apparatus 1 will be described with reference to FIGS. The karaoke apparatus 1 stores karaoke music karaoke music data D1, and performs karaoke music performance using the karaoke music karaoke music data D1, and can change the key of the performance music based on an operation from the user. .

  The karaoke song data D1 is digital audio data compressed in the MP3 (MPEGaudio layer 3) format, and is composed of a plurality of tracks. The plurality of tracks are three music tracks in which three music data d having different keys are stored, and a lyrics track in which lyrics data is stored.

  The music data d is audio data for one music divided into frames (sectors) having a time length of 1/75 sec, for example, and includes a header including a time code at the head of each frame. The three music data d are original music data d (hereinafter referred to as original key data d1), music data d (hereinafter referred to as treble key data d2) having a key higher than the original key by a predetermined amount (3 semitones). And music data d whose key is lower than the original key by a predetermined amount (3 semitones) (hereinafter referred to as bass key data d3).

  In this embodiment, when the karaoke apparatus 1 accepts an operation for instructing the user to change the key, the song data d of the key closest to the key for which the change instruction has been made among the song data d1 to d3 described above. Select. And the karaoke apparatus 1 performs the performance process which converts the selected music data d into an audio | voice signal, and performs the process for a key change with respect to this audio | voice signal.

  As a result, the degree of key change from the original key of the audio signal can be reduced compared to the case where the key change is always performed using the original key data d1. For this reason, it is possible to effectively reduce the degree of timbre change due to the key change, and it is possible to effectively reduce the degree of giving a sense of modulation and double feeling to the user.

  FIG. 1 is a block diagram showing a configuration of a karaoke apparatus 1 according to an embodiment of the present invention. The karaoke apparatus 1 is connected to a microphone 2, a speaker 3, and a monitor 4. The karaoke apparatus 1 is composed of a CPU (Central Processing Unit) 11 that controls the operation of the entire apparatus, and various devices connected to the karaoke apparatus 1 via buses and connectors (not shown).

  The CPU 11 is connected to a hard disk (hereinafter referred to as “HDD”) 12, a RAM (Random Access Memory) 13, an operation unit 14, an infrared light receiving unit 15, a performance processing unit 21, A / D (analog / A digital) converter 22, a mixer 23, a D / A (digital / analog) converter 24, and an amplifier 25 are connected. These devices perform karaoke music, change the key of the music, and mix the singing voice into the music.

  The HDD 12 stores a program such as a performance program for performing a karaoke song, and stores data necessary for executing the program. The HDD 12 functionally includes a song data storage unit 121 and a video data storage unit 122. The song data storage unit 121 is an area for storing karaoke song data D1 for playing karaoke songs. The karaoke piece data D1 includes the original key data d1, the high tone key data d2, and the low tone key data d3 described above, and also includes lyrics data d4.

  The lyric data d4 includes timing data that defines the timing for processing the event data, along with event data indicating the display, color change, and deletion of the lyrics. The video data storage unit 122 is an area for storing video data (background video data) D2 of a background image to be displayed on the monitor 4. The RAM 13 is a work area of the CPU 11, and an area for reading a program, song data, and background video data from the HDD 12 is set.

  The operation unit 14 includes, for example, a panel switch group and receives an operation from the user and inputs an operation signal indicating the operation content to the CPU 11 (an operation input processing unit 111 described later). Further, the infrared light receiving unit 15 receives infrared light indicating the operation content output from the remote controller (remote controller) 1A attached to the karaoke apparatus 1 as an operation signal. The infrared light receiving unit 15 inputs the received operation signal to the CPU 11 (operation input processing unit 111 described later).

  The operation using the operation unit 14 or the remote controller 1A described above includes, for example, an operation for selecting a karaoke piece to be reserved for performance by inputting a song number for identifying a karaoke piece, or a key change of a karaoke piece to be played. There are key control operations for inputting instructions.

  Referring to FIG. 2, the operation unit 14 includes a key display unit 201 made of, for example, an LCD (Liquid Crystal Display), a key up button 202, and a key down button 203. The above-described key change instruction is input using the key-up button 202 and the key-down button 203. Specifically, the key is changed from the original key to the treble direction according to the number of times the user presses the key up button 202 with a finger or the like. Further, the key is changed from the original key to the bass direction according to the number of times the user presses the key down button 203 with a finger or the like.

  For example, when the key up button 202 is pressed once, “+1” is obtained, and when the key down button 203 is pressed once, “−1” is obtained. “+1” makes the semitone key higher than the original key, and “−1” makes the semitone key lower than the original key. If the key up button 202 and the key down button 203 are simultaneously pressed, the key setting is restored to the original key. Then, the key change amount (for example, “−1”, “+1”, etc.) from the original key is displayed on the key display unit 201.

  Returning to FIG. 1, the performance processing unit 21 is realized by, for example, a DSP (Digital Signal Processor). The performance processing unit 21 receives one piece of music data d among the data d1 to d3 from the CPU 11 (a performance control unit 112 described later). The performance processing unit 21 performs a process of decoding the input music data d into an audio signal.

  The performance processing unit 21 is notified of the key change amount from the CPU 11 (operation input processing unit 111 described later). The performance processing unit 21 performs a process (key change process) for changing the key with the notified key change amount for the expanded audio signal. This key change processing is the division processing, resampling processing, superposition processing, and the like shown in FIG. Thereby, a karaoke performance can be performed with a user desired key.

  The A / D converter 22 converts the singing voice signal of the singer input by the microphone 2 into a digital signal and outputs the digital signal to the mixer 23.

  The mixer 23 inputs the voice signal of the karaoke music from the performance processing unit 21 and also inputs the singer's singing voice signal via the microphone 2-A / D converter 22. The mixer 23 gives an effect such as echo to the audio signal and the singing audio signal of these karaoke songs, and mixes these signals with an appropriate balance. The mixer 23 inputs the mixed digital audio signal to the D / A converter 24. The effect that the mixer 23 gives to each audio signal and the balance of mixing are controlled by the CPU 11. The D / A converter 24 converts the input digital audio signal into an analog signal and inputs the analog signal to the amplifier 25. The amplifier 25 amplifies the input audio signal and inputs it to the speaker 3. As a result, the singing voice is emitted from the speaker, and the karaoke music is emitted by the user desired key.

  The CPU 11 is connected to an MPEG decoder 31 and a synthesis circuit 32, and a background image in which lyrics telops are synthesized is displayed on the monitor 4 by these devices.

  The MPEG decoder 31 converts the input MPEG data into an NTSC (National Television System Committee) video signal and inputs it to the synthesis circuit 32. For example, the MPEG decoder 31 performs signal conversion of background video data encoded in the MPEG2 format, which is input from the CPU 11 (background video reproduction processing unit 114 described later). The MPEG decoder 31 outputs the converted signal to the synthesis circuit 32.

  The synthesizing circuit 32 is a circuit that synthesizes an OSD (On Screen Display) such as a lyrics telop with the video signal of the background video output from the MPEG decoder 31. The monitor 4 is, for example, a CRT (Cathode Ray Tube) display, an LCD (Liquid Crystal Display), or the like, and displays an image output from the synthesis circuit 32.

  A communication unit 33 is further connected to the CPU 11. The communication unit 33 is an interface circuit for performing communication via a wide area network such as a LAN (Local Area Network) or the Internet.

  The CPU 11 functionally includes an operation input processing unit 111, a performance control unit 112, a lyrics sequencer 113, a background video reproduction processing unit 114, and a communication processing unit 115 by executing the program.

  The operation input processing unit 111 executes processing according to the operation signal input from the operation unit 14. For example, when an operation signal indicating a song number of a karaoke song selected as a performance reserved song by the user is input, this song number is notified to the performance control unit 112. When an operation signal indicating a key change is input, the operation input processing unit 111 notifies the performance control unit 112 of the changed key setting and notifies the performance processing unit 21 of the key change amount. The operations of the performance control unit 112 and the performance processing unit 21 that have received this notification will be described in detail later.

  The performance control unit 112 reads the karaoke song data D1 corresponding to the song number notified from the operation input processing unit 111. That is, the performance control unit 112 reads the lyrics data of the lyrics track and stores it in the RAM 13 before the performance starts.

  The performance control unit 112 sequentially reads the music data d from the HDD 12 for each frame and inputs it to the decoding processing unit 211. At the same time, the performance control unit 112 instructs the lyrics sequencer 113 to read the event data in accordance with the timing data of the lyrics data D11.

  Here, the performance control unit 112 normally reads the original key data d1 (when the changed key setting is not notified). On the other hand, when the changed key setting is notified, the data of the key closest to the key instructed to change is read out of the music data d1 to d3 included in the karaoke music data D1 indicated by the music number.

  For example, when the key is changed higher than “+2”, the treble key data d2 is read out because the treble key data d2 is closer to the changed key than the original key data d1. On the other hand, when the value is changed to be lower than “−2”, the bass key data d3 is closer to the change key than the original key data d1, and thus the bass key data d3 is read.

  If there is a notification of the changed key setting before the start of the performance of the karaoke music, the performance control unit 112 reads the music data d closest to the key instructed to change from the beginning of the performance. On the other hand, when there is a notification of the changed key setting in the middle of the song and the song data d to be input to the performance processing unit 21 is changed, the performance control unit 112 of the frame currently performing the performance processing by the performance processing unit 21 From the next frame, the data to be read out of the music data d1 to d3 is changed and input to the performance processing unit 21.

  Here, the music data d1 to d3 includes the same time code in the headers of the parallel frames. Therefore, by reading a frame having the same time code as the next frame of the frame being processed by the performance processing unit 21, a frame at a performance position synchronized with the performance position of the next frame can be read out. Thereby, even if the music data d to be read out is changed, the performance flow of the karaoke music is not affected.

  The performance control unit 113 inputs the read data to the performance processing unit 21. As described above, the performance processing unit 21 converts the input music data d into an audio signal, and executes a process of changing the key with the notified content for the converted audio signal. Here, the music data d input from the performance control unit 112 is the music data d closest to the key instructed to be changed as described above.

  For this reason, the key change process is executed for the audio signal of the music data d of the key closest to the key instructed to change, and the key change is always performed using the audio signal of the music data d1 of the original key. Thus, the degree of key change can be suppressed to a lower level. As a result, the degree of timbre change and the degree of modulation and dubbing due to the key change process can be reduced.

  The lyric sequencer 113 sequentially reads out the lyric data d4 in the karaoke song data D1 from the RAM 13 when the performance control unit 112 instructs to read out the lyric data. The lyrics sequencer 113 generates a lyrics pattern by processing the event data in accordance with the timing data included in the read lyrics data d4 and inputs it to the synthesis circuit 32.

  The timing data is set so that the lyrics corresponding to the performance position are displayed when the performance of the karaoke music is performed with the timing data included in the music data d1 to d3. Also, the lyrics of the part after the performance are changed. Thereby, the lyrics can be displayed on the monitor 4 in synchronization with the performance of the karaoke music, and the color of the lyrics pattern can be changed in synchronization with the performance.

  For example, the background video reproduction unit 33 sequentially reads background video data D2 corresponding to the selected karaoke song in accordance with an instruction from the performance control unit 112 and outputs the background video data D2 to the synthesis circuit 32. The communication processing unit 115 performs communication using the communication unit 33. Specifically, the communication processing unit 115 downloads the karaoke song data D1 from the center server that distributes the karaoke song data D1, and stores it in the HDD 12.

  FIG. 3 is a flowchart showing a music data change process executed by the performance control unit 112 shown in FIG. First, the performance control unit 112 repeatedly determines at every predetermined time interval whether or not the changed key setting has been notified until it is determined that it has been notified (S1). If it is determined that the changed key setting has been notified (YES in S1), the performance control unit 112 determines which music data d has the key closest to the changed key setting (S2).

  Thereafter, the performance control unit 112 determines whether the currently read music data d is the music data d of the key closest to the changed key setting (S3). If it is determined that the currently read music data d is not the music data d of the key closest to the changed key setting (NO in S3), then the performance control unit 112 returns this process to step S1. . For this reason, the performance control unit 112 continues to read the currently read music data d.

  On the other hand, when it is determined that the currently read music data d is the music data d of the key closest to the changed key setting (NO in S3), the performance control unit 112 is the most similar to the changed key setting. The music data d to be read is changed to the music data d of the near key (S4). Thereafter, the performance control unit 112 returns the process to step S1.

  FIG. 4 is a flowchart showing a key change process executed by the operation input processing unit 111 shown in FIG. This process is executed in parallel with the performance process of karaoke music described above. First, the operation input processing unit 111 repeatedly determines whether a key setting change instruction has been input at predetermined time intervals until it is determined that the input has been input (S11).

  When it is determined that a key setting change instruction has been input (YES in S11), the operation input processing unit 111 notifies the performance control unit 112 of the key setting according to the key setting change instruction (S12). Thereafter, the performance control unit 112 sets a change amount from the current key setting in accordance with the key setting change instruction in the performance processing unit 21 (S13). Thereafter, the operation input processing unit 111 returns the process to step S11.

  As described above, in this embodiment, the karaoke song data D1 stores song data d2, d3 of different keys in addition to the song data d1 of the original key. When an operation for instructing key change is received from the user via the operation unit 14, the music data d closest to the key instructed to change is selected and read. Then, key change processing is performed on the audio signal of the music data d. The audio signal after the key change process is input to the speaker 3.

  In this way, since the key change processing is performed on the audio signal of the music data d closest to the key instructed to be changed, the original key data d1 is always used only to change the key compared to the original key data d1. The degree of key change from the key can be reduced. As a result, the degree of timbre change due to the key change can be effectively reduced, and the degree of giving a sense of modulation and doubleness to the user can be effectively reduced.

  In the present embodiment, the following modifications can be adopted.

  (1) In this embodiment, when the key change instruction is received by the operation unit 14, the music data d closest to the key instructed to change is selected, and the performance is performed on the selected music data d. The processing unit 21 performs performance processing and key change processing. The present invention is not limited to this. For example, the performance processing unit 21 may perform the performance processing by synchronizing all the music data d1 to d3. Then, only the audio signal of the music data d selected by the performance control unit 112 may be subjected to key change processing by the performance processing unit 21 and output to the mixer 23. This configuration also has the same effect as this embodiment.

  (2) The number of music data d included in the music data is not limited to three, and may be two or more than three.

  (3) The present invention is not limited to being applied to a karaoke apparatus. The present invention can be applied to any audio device having a function of changing keys.

It is a block diagram which shows the structure of the karaoke apparatus concerning embodiment of this invention. It is a figure which shows the external appearance structure of the part which inputs the instruction | indication of a key change of an operation part and a remote control. It is a flowchart which shows the change process of the music data which the performance control part shown in FIG. 2 performs. It is a flowchart which shows the process for the key change which the operation input process part shown in FIG. 2 performs. It is a figure for demonstrating the process of a key change.

Explanation of symbols

1-karaoke device (audio device) 1A-remote controller (operation unit) 3-speaker 14-operation unit 21-performance processing unit (performance means) 111-operation input processing unit (operation signal input unit) 112-performance control unit (performance) Control means) 113-performance control section (performance control means) 121-music data storage section (storage section) d (d1-d3) -karaoke music data d1-original key data d2-high key data d3-basic key data

Claims (2)

Stored in the storage unit for storing the song data of the karaoke song divided for each frame, the operation signal input means for inputting the operation signal from the operation unit for accepting the operation for instructing to change the key setting of the song, and stored in the storage unit And a performance means for performing a performance process for reproducing the reproduced music data and performing a key change process for changing the reproduced audio signal to a key in accordance with a change instruction received by the operation unit. A karaoke device that outputs to
The storage unit stores a plurality of pieces of music data with different keys,
When a key change instruction operation is accepted by the operation unit, the music data of the key closest to the key instructed to change is selected from a plurality of music data stored in the storage unit, and the selected music A performance control means for controlling the key change process of the performance means so as to perform a key change process on the audio signal of the data;
The performance control means is configured such that when the performance means accepts an operation of a key change instruction while the music data is being reproduced by the operation unit, the selected music data is reproduced from the next frame. A karaoke apparatus characterized by controlling the means. The karaoke apparatus according to claim 1,
One of the plurality of music data is original key data of the karaoke music, and the other data is music data of a key that is higher or lower by a predetermined amount than the original key.
A karaoke apparatus characterized by that.

Images