JPH02215264A - Melody sending system - Google Patents

Abstract

PURPOSE:To evade complex constitution and to send a melody by providing a sound source storing circuit and a sequence information storing circuit, successively reading sequence information, and obtaining sound source information according to the result. CONSTITUTION:A rise I and fall II of the sound and the section except them are divided at the same interval as the I and II, the waveforms of respective patterns of I-III are digitized to respective musical scales, and they are stored in a sound source information storing circuit 4. A counter 2 is operated by a clock pulse 10. The front stage output is made into low order information 11 of the information storing circuit 4, and it is made into the address of a small block in an EI. The output of a rear stage is made into address information 12 of a sequence information storing circuit 3, a high order address 13 of the sound source information storing circuit 4 is read, a detecting circuit 5 is operated by stop information 15, and the counter 2 is reset. By the address information pieces 11 and 13, digital information 14 of the melody is read from the sound source information storing circuit 4. By such constitution, every melody information can be digitized, and the circuit is not made complex.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a melody tone sending system in a digital telephone exchange.

(Prior Art) Conventionally, this type of melody sound was transmitted using an analog sound source as a sound source, digitized by a Kobukku or the like, and then transmitted.For example, as shown in FIG. A digital signal of the melody was obtained from the analog melody by the Kobukku 21 using the clock signal of the clock pulse generation circuit 22.

(Problem B to be solved by the invention) The conventional method described above necessarily requires an analog circuit, resulting in a complex circuit configuration, and is uneconomical because analog and digital data are mixed. But there was.

(Means for Solving the Problems) In order to eliminate the above-mentioned drawbacks, the present invention provides a sound source storage circuit and a sequence information storage circuit, and has a circuit configuration that sequentially reads sequence information and obtains sound source information accordingly. .

(Example) Next, one example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a melody sending device according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of the waveform of the shortest unit of sound required.

Here, divide the duration of the sound into two equal parts, and calculate the rise of the first half by ■,
The fall in the second half is assumed to be ■. For longer sounds,
As shown in Figure 3, except for the rising I and falling ■ parts, I
, II at equal intervals and call this ■. For each scale shown in Figure 6, ■.

The waveforms of each pattern of ■ and ■ are digitized, and this is
The information is stored in the sound source information storage circuit 4 shown in the figure.

FIG. 4 shows an example of this accumulation state, where AI means A
This shows that the digital signal data of the sound ■ pattern is stored in consecutive addresses. Further, the combination information of these sound sources is stored in the sequence information storage circuit 3 of FIG.
is accumulated in FIG. 5 shows a part of the musical score in FIG. 7. Here, the upper address of El is the upper bit of the top address where the El sound source of the storage circuit shown in FIG. 4 is stored. It refers to information.

First, the clock pulse signal 10 is generated by the clock pulse generation circuit 1, and the counter circuit 2 is operated. The output of the previous stage of this counter circuit 2 is the sound source information storage circuit 4.
The lower address information 11 becomes, for example, the address of a small block in El shown in FIG. For example, the upper address information 13 of the sound source information storage circuit 4 is read out in the sequence shown in FIG. 5, and at the end of the sequence,
That is, at the end of the melody, stop data is written in the sound source information storage circuit 4 as shown in FIG. Reset to initial state. Melody digital data 14 is read out from the sound source information storage circuit 4 according to the addresses of the lower address information 11 and the upper address information 13.

In addition, in the description of the above embodiment, for the sake of simplicity, it is assumed that there is no read delay time of the storage circuits 3 and 4, but in reality, it is necessary to take the delay into consideration.

(Effects of the Invention) As explained above, the present invention can digitize all melody information by providing two storage circuits and a circuit for reading them, and can prevent the circuit from becoming complicated and uneconomical. effective.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a melody sending device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of the waveform of the shortest unit of sound, and FIG. 3 is a diagram showing an example of the waveform of a general sound. FIG. 4 is a diagram showing an example of storage of sound source information storage data, FIG. 5 is a diagram showing an example of storage of sequence information storage data, FIG. 6 is a diagram showing a melody scale, and FIG. 7 is a diagram showing an example of musical score. , FIG. 8 is a block diagram of a conventional melody sending circuit. DESCRIPTION OF SYMBOLS 1... Clock pulse generation circuit, 2... Counter circuit, 3... Sequence information storage circuit, 4... Sound source information storage circuit, 5... Stop data detection circuit, 10... Clock pulse signal , 11...Sound source information storage circuit lower address information, 12.
...Sequence information storage circuit address information, 13...
Sound source information storage circuit upper address information, 14... Melody digital data, 15... Stop data information, 16... Counter reset signal. Agent Patent Attorney Toshiyoshi Somekawa

Claims (1)

[Claims] In a melody transmission method using digital telephone exchange equipment, a sound source information storage circuit that divides one continuous note of a musical scale into rising notes, falling notes, and continuous notes, and stores digital signal data for a certain period of time for each note. and a sequence information storage circuit that stores combination information of rising notes, falling notes, and continuous notes of the scale, sequentially reads out the combination information from the sequence information storage circuit, and reads the combination information from the sound source information storage circuit according to the read information. A melody transmission method characterized by reading out digital signal data.