JP2002132257A - Method of reproducing midi musical piece data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of reproducing MIDI musical piece data which smoothly executes processing exclusive of MIDI by lessening the burden of a CPU 1 rapidly increasing after the start of MIDI musical piece reproduction in an on-line KARAOKE sing-along machine. SOLUTION: A step (step 2) of extracting the setup data described forward of playing data in the MIDI musical piece data and a step (step 3) of setting (timbre, sound volume, normal of tones, etc.), of a MIDI sound source circuit 3 by using the extracted setup data are executed prior a step (step 5) of reproducing the musical pieces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a MIDI music data reproducing method for reproducing music using a MIDI music reproducing device such as a communication karaoke device.

[0002]

2. Description of the Related Art For example, a MIDI (Musical Instrument Digital) such as a communication karaoke apparatus described below.
Interface) Many MIDI music reproducing devices that use music data simultaneously perform processing other than the MIDI processing when executing the MIDI music data processing.

FIG. 2 shows a configuration of a communication karaoke apparatus for reproducing music using MIDI music data as an example of a MIDI music reproducing apparatus according to the prior art. The communication karaoke apparatus shown in FIG. 2 has a memory 2 for recording music data (including music performance data, chorus voice data, lyrics character data, etc.) including MIDI music data (music performance data), and a CPU (CPU) for controlling the apparatus. Central Pr
processing unit) 1, a MIDI tone generator circuit 3 for playing back music using MIDI music data, an audio reproduction circuit 4 for playing sound (chorus) accompanying the music using audio data included in the music data, A lyric character synthesizing circuit 5 for synthesizing and outputting lyric characters of a music with a background image for monitor display using lyric character data included in the data, and a communication circuit 6 as a communication interface with the outside. .

[0004] In the conventional communication karaoke apparatus having the above-described configuration, the operation performed at the time of reproducing the music is as follows.

A C operating according to a predetermined processing program
The PU 1 first reads out music data recorded on the memory 2. Then, the CPU 1 executes the following (1) to (4)
Are required to be performed simultaneously. (1) The MIDI music data section (performance data section) included in the music data is transmitted to the MIDI tone generator circuit 3 to reproduce the music. (2) The audio data portion included in the music data is transmitted to the audio reproduction circuit 4, and the audio (chorus) accompanying the music is reproduced. (3) The lyrics character data portion included in the music data is transmitted to the lyrics character synthesizing unit 5, and the background image is synthesized with the lyrics character screen. (4) Execute network processing via the communication circuit 6.

Here, the configuration of MIDI music data included in the music data will be described with reference to FIG. As shown in FIG. 3, the MIDI music data is composed of a plurality of tracks (track 1 to track n in FIG. 3) in units of a musical instrument to be played. At the beginning of each track, data (hereinafter referred to as setup data) for performing various initial settings of the MIDI tone generator circuit 3 in order to correspond to the tone color of each musical instrument, etc., is about 2 seconds at the beginning of the music performance time. It is described that the setting is transmitted to the above-mentioned MIDI tone generator circuit 3 and set therein. The performance data is created so that the sound of the music starts after about 2 seconds required for the setting.

The MI used by the communication karaoke apparatus of this embodiment
The DI music data does not have a configuration in which the performance data of the music and the above-described setup data are separated from each other, but has a configuration in which the initial setting data is included in the first two seconds or so as a part of the data. The reason for this configuration is as follows. (1) In the case of a medley tune or the like in which a plurality of tunes are continuously played, the settings may be changed during the performance, and it is originally difficult to completely separate the performance data and the setup data (setup data). (2) In particular, in a reproducing apparatus for karaoke use, a certain period of time is required from the start of performance to the start of actual reproduction of a musical tone for title display and the like, and the time is used to initialize the MIDI sound source means. It is possible to do.

[0008]

By the way, the data amount of the above-mentioned setup data has been gradually increased with the improvement of the performance of the MIDI sound source. In order to complete the transmission of the increased setup data within a time period of about 2 seconds generally allowed as a setup time, the transmission rate of the MIDI data in this section is often increased to near the limit, and the transmission is often performed. However, there is a possibility that the load for performing the MIDI processing immediately after the start of the music reproduction occupies most of the allowable load (processable load) of the CPU 1.

On the other hand, the CPU 1 performs not only the above-mentioned MIDI music reproduction processing, but also communication processing that occurs irregularly, and during the time period immediately after the music performance starts, the title display and deletion of lyrics characters, voice narration, and the like are performed. Other processing is also required. Therefore, as described above, only the MIDI processing is performed by the CPU 1
If the load is occupied, processing other than the MIDI processing may not be performed smoothly.

Therefore, the present invention has been made in view of the above-mentioned problems, and in particular, prior to the start of music reproduction, a step of extracting all of the setup data and designating a tone to be played, and And reproducing the performance data based on the designated tone.
M that reduces the processing load of the arithmetic unit (CPU) that controls the MIDI music playback device immediately after the start of the MIDI music playback, and executes various processes performed by the arithmetic unit without any trouble.
An object of the present invention is to provide an IDI music data reproducing method.

[0011]

In order to solve the above-mentioned problems, the present invention provides a MIDI music data reproducing method having the following configuration. Music data including setup data that specifies the tone to be played in the performance data specified by the MIDI standard (FIG. 3 MIDI music data)
To the sound source means defined by the MIDI standard (FIG. 2 MID
Playback apparatus (communication karaoke apparatus) provided with I sound source means 3
In the method of reproducing MIDI music data, the step of extracting all of the setup data and designating a tone to be played (FIG. 1, steps S2, S3, S)
4) and a step of reproducing the performance data based on the designated tone color (step S5).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIG. FIG.
5 is a flowchart of MIDI music reproduction performed by the communication karaoke apparatus of the present embodiment. The same parts as those described above are denoted by the same reference numerals and description thereof will be omitted.

The communication karaoke apparatus of the present embodiment extracts only the data of the setup section used for setting the MIDI apparatus from the music data, and performs an initial setting process according to the data extracted before starting the reproduction of the music data. Is characterized in that the load on the arithmetic unit after the reproduction is started is reduced, and sufficient processing capability is supplied to processing other than the MIDI music reproduction. Hereinafter, the communication karaoke apparatus of the present embodiment will be specifically described.

The communication karaoke apparatus according to the present embodiment is described in FIG.
2, a memory 2 for recording music data including MIDI music data, a CPU 1 for controlling the apparatus, and a MIDI tone generator circuit for playing music using the MIDI music data. 3. A sound reproduction circuit 4 for reproducing a sound (chorus sound) accompanying the music using the sound data included in the music data, and a lyric character data included in the music data as a background image for monitor display. The system includes a lyric character synthesizing circuit 5 for synthesizing and outputting lyric characters of a song, and a communication circuit 6 as a communication interface with the outside. Just CPU
No. 1 exerts a specific effect by performing control specific to the present embodiment as described below.

FIG. 1 shows a flowchart of the MIDI music reproduction executed by the CPU 1 as the control means of the communication karaoke apparatus of the present embodiment. The communication karaoke of the present embodiment is characterized in that the following processing (steps S1 to S4) is performed prior to the start of music reproduction (step S5), which is the same operation as the conventional communication karaoke apparatus. There is.

Prior to the description of FIG. 1, a description will be given to supplement the configuration of MIDI data. As described above, the MIDI music data includes a plurality of tracks, and each track describes the following message to be transmitted to the MIDI sound source circuit in the order of reproduction along with the performance time to be transmitted. (1) System exclusive message: Set the volume of the entire tone generator circuit. (2) Channel message: Selects the tone color of each instrument, sets the volume, etc., and controls sound generation and mute.

The above channel messages are further mainly classified into the following messages. (2-1) Note message: Controls sound generation and mute. (2-2) Program change message: Select instrument tone. (2-3) Control change message: Set volume, localization, etc.

At the time of playback of MIDI music, these messages are taken out of all tracks in the order of playback,
Transmission is performed to the tone generator circuit according to the performance time.

Returning to the flowchart of FIG. 1, when the CPU 1 of the communication karaoke apparatus of the present embodiment starts a pre-process performed before reproduction (step S1), it extracts a message corresponding to the setup data from the music data (step S2). Then, the extracted contents are transmitted to the tone generator circuit to perform setting (step S3). The message corresponding to the setup data extracted as described above refers to a message described at a position before the first note message (note-on message for sounding, note-off message for silencing). Specifically, the tone, volume,
This is a message for setting sound localization and the like.

Then, the CPU 1 detects a note message (step S4). At the time when the note message is detected, the CPU 1 assumes that all the setup data has been extracted, terminates the preprocessing, and starts reproducing the music. (Step S5).

The MIDI music data used for the reproduction of the music in step S5 has the same structure as the MIDI music data shown in FIG. 3 except that there is no portion corresponding to the setup data and only the performance data is used. Are equivalent. Therefore, the processing load of the CPU 1 in the section immediately after the start of the music performance has a sufficient margin as compared with the conventional communication karaoke apparatus because the setting based on the setup data is not executed. It is possible to improve the performance and functions by performing other processing operations of the communication karaoke apparatus, for example, setting of character display, communication with the outside, etc.

As described above, the communication karaoke apparatus of this embodiment performs processing other than MIDI music data reproduction in the MIDI music data reproduction apparatus having a limited processing capability.
It can be executed smoothly at the same time as the reproduction of the music data.

[0023]

As described above in detail, according to the present invention, prior to the start of reproduction of a music piece, all of the setup data is extracted and a tone color to be played is designated, and then, a tone is specified based on the designated tone color. And reproducing the performance data, thereby reducing the processing load of the arithmetic means (CPU) for controlling the MIDI music reproducing apparatus immediately after the start of the MIDI music reproduction and executing the various processings performed by the arithmetic means without any trouble. A method of reproducing MIDI music data can be provided.

[Brief description of the drawings]

FIG. 1 is a flowchart of a music reproduction operation performed by a communication karaoke apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram of a communication karaoke apparatus.

FIG. 3 is a configuration diagram of MIDI music data.

[Explanation of symbols]

 3 MIDI sound source means (sound source means)

Claims (1)

[Claims] 1. A MIDI music data reproducing method for reproducing music data including setup data for specifying a tone to be played in performance data specified by the MIDI standard by a reproducing apparatus having a sound source means specified by the MIDI standard. A step of extracting all of the setup data and designating a tone to be played prior to the start of reproduction of the music, and a step of playing back the performance data based on the designated tone. A method for reproducing MIDI music data.