JPH03268665A - Digital tone generating circuit - Google Patents

Abstract

PURPOSE:To attain a change in a kind of a tone to he outputted with a data change only in an inter storage element by designating a sound source of a tone storage element with a sound source designation data of the inter storage element. CONSTITUTION:An interval data of a tone and a sound source data sent to a TS corresponding to a TS counter 8 and an inter counter 7 from an inter storage element 14 are read. The sound source data is an input address to a tone storage element 13, the sound source is designated and a sound source data is read from the tone storage element 13 by a tone counter 3. The sound source data read from the tone storage element 13 is converted into a serial data by a conversion circuit 11, fed to a gate circuit 12, and an interval data is added to the tone data and the result is sent externally. Thus, when the sound source designation data in data structure of the inter storage element 14 is varied, the tone source is changed without changing the data of the tone storage element 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital tone generation circuit that reads out the source and interruption ratio of an audible sound from a storage element and generates a tone.

[Conventional technology]

3 and 4(a) to 4(C) are a block diagram and data state diagram of a conventional digital tone generating circuit.

In Figure 3, 1 is a tone storage element that stores tone data for each TS, which is a continuous tone that is the source of audible sounds, and is determined by frequency and level. TS is an inter-memory element 3 which generates an address for reading the tone data of the 1-on storage element 1, and 4 temporarily stores the counter value of the tone counter 3. A tone and address memory; 5 is a stop detection unit that detects a stop code from the output data of the tone storage element 1; 6 is a stop detection unit that detects a stop code from the output data of the tone storage element 1; 7 is an inter counter that generates an address for reading interval data of the inter storage element 2;

8 is a TS counter that determines the TS that outputs tone data and inter data; 9 is a tone counter 3. A timing circuit generates the evening timing of the inter counter 7 and the TS counter 8; 10 is an interselector that selects the interval data to be sent currently from the output data of the inter memory element 2; 11 is parallel data read from the tone memory element 1; A conversion circuit that converts data into serial data.

12 is a get circuit that adds inter data from the inter selector 10 to continuous audible sound data from the conversion circuit 11;

FIG. 4(a) is a data state diagram showing a state in which tone data to be output to TS○# to n: is accumulated.

(b) is a data state diagram showing a state in which interval data corresponding to each TS is accumulated, and (c) is a state diagram showing tone data, interval data, and TS numbers input to the gate circuit 12. The operation of the conventional digital tone generating circuit will be explained below with reference to FIGS. 1 and 2.

As shown in FIG. 4(a), the tone data stored in the tone storage element 1 is read out by the TS counter 8 and tone counter 3, converted into serial data by the conversion circuit 11, and sent to the gate circuit 12. Figure 4(b)
The inter data stored in the ink storage element 2 is read out by the TS counter 8 and the inter counter 7 as shown in FIG. As shown in the fourth section (c), the gate circuit 12 transmits continuous audible tone data intermittently using interval data.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, since the tone to be remembered for each TS is determined by the tone storage element and the inter-memory element, it is difficult to change the tone type and interruption ratio to be sent to any TS. However, it was difficult to change the tone sent to each TS because two storage elements had to be changed.

An object of the present invention is to change the tone type and interruption ratio sent to each TS.

[Means for Solving the Problems] The above object is to add sound source specification data to the inter storage element, to designate the sound source of the tone storage element by the read data of the inter storage element, and to add the sound source specification data of the inter storage element and the interval. By changing the data, it is possible to change the sound source and interruption ratio sent to each TS.

[Operation] The present invention adds data specifying the sound source to be sent at that time to the inter-memory element that determines the intermittence of tones to be sent to each TS, and reads out the specified sound source from the tone storage element based on the sound source specification data and sends it to each TS. Send a tone.

[Example] An example of the present invention will be described below with reference to FIGS. 1 and 2 (a) to (
This is explained by C). FIG. 1 is a block diagram of a digital tone generating circuit according to the present invention, and FIGS. 2(a) to 2(C) are data state diagrams thereof.

Components in FIG. 1 that have the same functions as those in FIG. 3 are designated by the same numbers. Reference numeral 13 indicates a tone memory element that stores audible continuous data, and reference numeral 14 indicates an inter memory element that stores a sound source for each TS and its corresponding interval.

FIG. 2(a) shows the data structure of the tone storage element 13, and is a data state diagram showing the state in which audible sound source data l to m are stored. FIG. A data state diagram showing a state in which sound source designation data of tones to be transmitted and interval buttons are accumulated for each TS; (C) is a state diagram showing tone data, interval data, and TS numbers input to the gate circuit 12;

In the digital tone generation circuit configured as described above, the interval data of the tone sent to the corresponding TS by the TS counter 8 and the inter counter 7 from the inter storage element 14 in the data state shown in FIG. Sound source data is read. The sound source data becomes the input address of the tone storage element 13 in the data state shown in FIG.
The sound source data is read from the tone storage element 13.

The sound source data read from the tone storage element 13 is converted into serial data by the conversion circuit 11 and sent to the gate circuit 12, where the gate circuit 12 adds an interval variable to the tone data as shown in FIG. 2(C). Send to outside. Therefore, by changing the sound source designation data in the data structure of the inter storage element 14 shown in FIG. 2(b), it is possible to change the tone sound source without changing the data of the tone storage element 13.

Also, if we pay attention to TS1= in the data state diagram of FIG. 2(b), the data of sound sources 2 and 4 are specified on the same -TS, and two types of sound sources are sent on the same -TS. In this way, by specifying several types of sound source specification data, the same -TS
It is possible to send out multiple sounds.

[Effects of the Invention] According to the present invention, since the sound source of the tone storage element is specified by the sound source specification data of the inter-memory element, when changing the tone type of the tone output from the digital tone generation circuit, only the data of the inter-memory element needs to be changed. It has the effect of being able to do this.

Furthermore, by using the sound source specification data to specify a plurality of sound sources, there is an effect that a plurality of sounds can be sent to the same TS.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing a digital tone generation circuit of the present invention, FIG. 2 is a data state diagram showing the input states of the tone storage element, inter storage element, and gate circuit of FIG. 1, and FIG. FIG. 4 is a block diagram showing the digital tone generating circuit. FIG. 4 is a data state diagram showing the input states of the tone storage element, inter storage element, and gate circuit of FIG. DESCRIPTION OF SYMBOLS 1... Conventional tone storage element, 2 - Conventional ink storage element, 3... Tone counter, 4... Tone address memory, 5... Stop detection section, 6... Selector, 7... Inter counter, 8-TS counter. 9...timing circuit, 10...interselector,
11. Conversion circuit, 12. Gate circuit, 13. Figure 4 data interval data of the present invention. 1=ON O=OFF

Claims (1)

[Claims] 1. In a digital tone generation circuit that generates various audible sound signals of a time-sharing electronic exchange, a tone storage element that stores an audible sound source, and an inter-memory element that stores interval data that determines the intermittent ratio of an audible person; Consisting of various counters for reading data from these storage elements, the sound source data read from the tone storage element is stored in the inter storage element,
A digital tone generation circuit characterized in that output data of a tone storage element is controlled by read data of an inter storage element.