JP3025779B2 - Rhythm reproduction device of digital music in online karaoke device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of reproducing digital information obtained by binary-coding music in a reproducing apparatus without using a large amount of information on a drum rhythm without using a large amount of information. The present invention relates to a rhythm reproducing device capable of reproducing well, and is particularly applied to an online karaoke device.

[Conventional technology and its problems]

In general, when reproducing digital information obtained by binary-coding music, the information is analyzed and processed by a CPU, input to a sound source such as a synthesizer, then converted into an analog signal, and then output by a reproducing apparatus. I do. Further, in this case, in order to perform the binary coding of the music, the performance is rearranged into data in chronological order, so that the amount of information becomes enormous. Therefore, if these data are to be input to the storage device in advance, a considerable capacity is required. Furthermore, if these data are stored as a database in the host computer, and are scheduled to be downloaded to the terminal device using a public line as necessary, data for each song can be transmitted. There is a problem that it takes time, not only the entire processing time becomes longer, but also the usage fee of the public line increases.

By the way, apart from complicated music for appreciation, for example, karaoke music is intended to be used for general amateur singing, so that the drum section does not employ a complicated rhythm and is relatively simple. Therefore,
Even in the case of karaoke music in which many genres must be assumed, the rhythm pattern of the drum section can be collected into several tens of typical patterns.

The inventor pays attention to this point, and once a pattern is designated from among the preset rhythm patterns of the drum section, the rhythm pattern is maintained as long as no change information is input, and the amount of information can be compressed as a whole. It is an object of the present invention to provide a digital music rhythm reproducing apparatus in an online karaoke apparatus.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention provides a storage device 5 which reads binary-coded music information in which rhythm information of a drum section predetermined according to a song is mixed in a data stream, Timer 2 divided by
And the output timing corresponding to the count number for one cycle of the counter, wherein the output strength data quantized for each part of the drum section corresponding to the rhythm information is made into continuous bits. A rhythm pattern table 6 accommodating a plurality of rhythm patterns composed of a matrix-like bit map having the following. A rhythm pattern specified by the rhythm information is read from the rhythm pattern table in parallel with the processing of the music information. CPU 4 that processes a plurality of parts of the read rhythm pattern in parallel in time series according to the integrated count value of
The I / O port 7 is used for output to the device.

[Action]

In the above means, the rhythm information is pre-mixed in the data stream, but aims to reduce the amount of transmission data. Then, a flag corresponding to the rhythm information is written in the management area of the CPU as one data table. The counter serves as a time reference for music progress, and has a function of regulating the tempo according to the cycle. The music progresses according to the progress of this counter, and the melody is played,
In parallel with this, one rhythm pattern is read from the rhythm pattern table according to the rhythm information mixed in the music information and processed. The rhythm pattern has an output timing that coincides with the counter cycle and is simultaneously specified in the form of a matrix in a quantized state up to the intensity of the sound. Therefore, the rhythm with the intensity is controlled by the progress of the tempo by the counter. The rhythm pattern is
They are arranged in parallel in time series, and have the effect of reproducing the rhythm according to the integrated count value of the counter by the CPU.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the block diagram schematically showing the reproducing apparatus of FIG. 1, reference numeral 1 denotes a clock, which is configured as an internal clock of a CPU or an external clock. Reference numeral 2 denotes a timer that divides the clock 1 to form a signal at a fixed interval, and 3 denotes a counter that is integrated by the timer 2 and has a fixed period, and the period is repeated by integrating the count value. In this embodiment, one cycle is 192 counts. 4 is a CPU for time management of the entire reproducing apparatus and for outputting signals, and 5 is a storage device for storing binary-encoded music information of one song.
This music information includes information about the rhythm of the drum section. Reference numeral 6 designates the rhythm and the strength of the sound for each part of the drum section.
A rhythm pattern table containing a plurality of rhythm patterns having output timings corresponding to the number of counts in the cycle, and is configured by a bit map. 7 is CPU
For serially outputting music information processed in parallel by
An I / O port 8 is a sound source for converting serially input music information into an analog signal and playing back the music.

FIG. 2 shows an example of a rhythm pattern for reproducing the rhythm of the drum section in the above configuration.
Here, the drum section consists of six types of instruments: bass drum, snare drum, tom tom x 2, cymbals, and hi-hat. There are two types of hi-hats: closed sound and open hit. Set the rhythm sound. Since the output timing coincides with the cycle of the counter 3, the melody can be advanced by the count value, and the rhythm can be advanced in synchronization with the melody. 0 in dynamic data
Indicates that there is no output for that part, a positive integer indicates that there is an output, and also indicates the dynamics of the sound. One rhythm pattern is formed by the bit map shown in FIG. 2. By preparing a plurality of kinds of rhythm patterns in advance, it is possible to adapt to the rhythm of general music.

By the way, since the CPU 4 controlling the entire reproduction apparatus is driven by an internal clock, various processes are restricted by a time axis. Therefore, unless it is a very high-speed CPU, if the CPU actually used processes each part of the drum section sequentially, there will be a gap between the melody and the rhythm, and it will not be possible to play music properly. I can no longer do it. Therefore, in the present invention, as the actual rhythm processing, the bit map of FIG.
It is a continuous bit composed of bytes, and this is advanced according to the count value of the counter 3. FIG. 3 shows an actual bitmap stored in the rhythm pattern table 6. Here, in the memory address, the output timing and the capacity of the strong and weak data are designated.
The strength information is specified in bytes. As can be seen from this table, the product of the number of musical instruments and the output timing matches the memory address. That is, the head address of the instrument-specific strong / low row to be determined from the current timing is immediately known, and the search time is reduced. The rhythm pattern table 6 contains a plurality of such bitmaps.

In the reproducing apparatus thus configured, the CPU 4 processes the melody portion of the music information according to the progress of the count value of the counter 3, outputs the melody portion from the I / O port 7 to the sound source 8, and specifies the music information. The specified rhythm pattern is read from the rhythm pattern table 6 based on the rhythm information, and is processed by the CPU 4 according to the count value. Here, even if the rhythm changes,
If different rhythm information is specified in the music information, the changed rhythm can be reproduced by this, so no matter how the rhythm is changed in one song, it is stored as a rhythm pattern We can respond appropriately as long as we can.

〔The invention's effect〕

According to the present invention, a plurality of types of rhythm patterns of the drum section are set in advance, and these are stored in the apparatus as a single data table in the form of a bit map, and are appropriately read out based on the rhythm information in the music information. The capacity can be reduced to an extremely small capacity, so that even when music information is transmitted through a public line, the transmission time can be shortened and the line usage fee can be reduced.

Further, since the data table is also quantized into the form of the dynamic information in a matrix form, the rhythm of the dynamic progresses only by referring to one table, and it is possible to avoid the processing delay in the CPU.

Also, since the rhythm is reproduced according to the count value of the counter that is the reference for music progression, simple rhythm reproduction that the melody progression and the rhythm progression can be completely matched regardless of the CPU processing capacity Various remarkable effects can be obtained, for example, the device can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing one embodiment of the apparatus of the present invention,
FIG. 2 is a bitmap diagram of a rhythm pattern, and FIG. 3 is a bitmap diagram of a rhythm pattern actually stored in the table. In the drawing, 1 ... clock, 2 ... timer, 3 ... counter, 4 ... CPU, 5 ... storage device, 6 ... rhythm pattern table, 7 ... I / O port, 8 ... sound source.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Shinnosuke Taniguchi 2-6-24 Nakamoto, Higashinari-ku, Osaka-shi, Osaka (56) References JP-A-62-159189 (JP, A) JP-A-59-159 201094 (JP, A) JP-A-60-83090 (JP, A) JP-A-60-24591 (JP, A)

Claims (1)

(57) [Claims] 1. A storage device 5 for reading binary-coded music information in which rhythm information of a drum section determined in advance according to a song is mixed in a data stream, and a timer 2 for dividing a clock 1 to be constant. The counter 3 is integrated in a cycle, and the output intensity data quantized for each part of the drum section in correspondence with the rhythm information is set as continuous bits, and has an output timing that matches the count number of one cycle of the counter. A rhythm pattern table 6 containing a plurality of rhythm patterns composed of a matrix bit map, and a rhythm pattern specified by the rhythm information are read from the rhythm pattern table in parallel with the music information processing, and the counter is integrated. Multiple parts of the read rhythm pattern are arranged in chronological order according to the count value. And CPU4 to process, the signal rhythm reproduction apparatus for digital music in online karaoke apparatus, comprising the I / O port 7 to be output to the tone generator 8 in serially from the CPU.