JPH04265892A - Acoustic signal generation device - Google Patents

Abstract

PURPOSE:To enable cost of a device to be reduced by reading an acoustic data out of a memory section of either integrated circuit and then reading non-recorded data from a memory section of another integrated circuit in synchronization with it. CONSTITUTION:The hour signal, etc., are supplied from a clock circuit to a central control circuit 9 at the hour, and then a start signal is supplied to integrated circuits 5a and 5b. Then, a prelude of memory sections 1a and 1b is red out by read control circuits 2a and 2b and a prelude is generated from a sound-generation means 7. Then, reading of the prelude data of the memory section 1a is completed after the memory section 1b, a melody data of the memory section 1a and a non-recorded data of the memory section 1b are read by a program-selection means 6 and then a melody is generated by the mean 7. Then, when reading of the memory section 1a and 1b is completed, a clock count is set by the circuit 9, a clock sound data of the memory sections 1a and 1b is repeatedly read by the circuits 2a and 2b, and clock sound is generated by the means 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic signal generator.

0002

2. Description of the Related Art There are commercially available integrated circuits that include a storage section in which a plurality of types of acoustic data are stored in advance, and a control circuit that selectively reads acoustic data from the storage section.
For example, it is used in watches that allow you to select a melody to be played at the alarm time. Such integrated circuits are operated by clock signals from independent oscillation circuits.

0003

[Problem to be solved by the invention] In the above integrated circuit,
Since the storage capacity of the storage unit is fixed, when used in a watch that requires many types of melodies, it is necessary to use a plurality of the same integrated circuits and store different melodies in each. In that case, providing separate oscillation circuits for each integrated circuit increases costs and makes it difficult to synchronize the operation timings of each integrated circuit.

Furthermore, the above-mentioned integrated circuit has a built-in preamplifier, and this preamplifier is forcibly kept in an inactive state except when reading melody data, and the oscillation circuit is also forced to stop oscillating to reduce current consumption. It is configured to reduce Therefore, simply sharing the oscillation circuit of each integrated circuit,
By simply mixing the outputs of each preamplifier, it has not been possible to activate only one desired integrated circuit. That is, when the oscillation circuit is shared, data is read from all integrated circuits at the same time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an audio signal generating device that can read audio data from a plurality of integrated circuits with a simple configuration.

[0006]

[Means for Solving the Problems] The present invention provides a plurality of integrated circuits including a storage section that stores acoustic data and has a silent data storage area, and a control circuit that reads out acoustic data or silent data from this storage section. a circuit, an oscillation circuit common to each of the integrated circuits, and a sound generating means for generating sound based on the acoustic data read from each of the integrated circuits, reading out the acoustic data from the storage section of any of the integrated circuits, The above problem is solved by reading out silent data from the storage section of another integrated circuit in synchronization with this.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the acoustic signal generating device according to the present invention is used in a clock that generates a sound and strikes the hour every hour on the hour will be described below with reference to the drawings.

In FIG. 1, reference numerals 1a and 1b are storage units in which prelude data, six types of melody data, hour beat data, and silence data (for example, rest data) are stored, respectively. As shown in FIG. 2, each storage area of the storage units 1a and 1b is divided into a plurality of areas, and each of the above-mentioned data is stored in each area. 2a and 2b are storage unit 1a
and a readout control circuit that selectively reads out various data from the storage sections 1a and 1b; 3a and 3b are acoustic signal output circuits that convert the various data read out from the storage sections 1a and 1b into acoustic signals (analog signals) and output them; 4a; 4b is a preamplifier that amplifies and outputs the above acoustic signal. 1a, 2
a, 3a, 4a constitute an integrated circuit 5a, 1b,
2b, 3b, and 4b constitute an integrated circuit 5b. In this example, when the reading of any of the various data described above from either one of the storage sections 1a and 1b is completed, the reading of data from the other storage section is interrupted. Reference numeral 6 designates a music selection means for specifying desired melody data from the storage units 1a and 1b, and 7 represents a sound generation means such as a speaker that generates sounds such as melodies based on the sound signals from the sound signal output circuits 3a and 3b. The capacitor C, the resistors R1 to R3, and the oscillating sections 8a and 8b constitute an oscillating circuit 8 that generates a clock signal for operating the integrated circuits 5a and 5b. 9 is a central control circuit that controls the operation of the entire apparatus.

Next, the operation of generating the prelude, melody, and ticking sound will be explained in accordance with the flowchart of FIG.

First, on the hour, an hour signal and time data are supplied to the central control circuit 9 from a clock circuit (not shown). This time data is stored in the central control circuit 9. Further, in response to the above-mentioned hour signal, a start signal is supplied from the central control circuit 9 to both integrated circuits 5a and 5b, and an enable signal is generated from the respective readout control circuits 2a and 2b. Signal output circuits 3a, 3b
, preamplifiers 4a and 4b, and oscillation circuit 8 are brought into operation (step A).

Next, the readout control circuit 2a specifies address 9 of the storage section 1a to read out the prelude data, and the readout control circuit 2b specifies address 9 of the storage section 1b to read out the prelude data. A prelude is generated from the sounding means 7 based on each prelude data (
Step B). In this example, each of the prelude data uses different musical instrument tones as sound sources, and are played back in synchronization to produce deep, high-quality sounds.

[0012] Subsequently, at the time when the reading of the prelude data from the storage section 1b is completed (time point x1 in FIG. 4), the reading of the prelude data from the storage section 1a is also completed. Continuing,
The melody data specified by the music selection means 6 and silent data are read from the storage section of the integrated circuit where the melody data is not stored, and the melody is generated from the sound generation means 7 based on these data. (Step C). In this example, it is assumed that the music selection means 6 specifies the melody data at address 1 of the storage section 1a, and the readout control circuit 2a specifies the address 1 of the storage section 1a and reads out the melody data. 2b specifies the address 7 of the storage section 1b, the silent data is read out, and the sounding means 7 generates a melody based on the melody data. That is, the storage unit 1a
When any one of addresses 1 to 6 of the storage unit 1b is specified, address 7 is specified in the storage unit 1b, and when any of addresses 1 to 6 of the storage unit 1b is specified, address 7 is specified in the storage unit 1a. It is controlled by the central control circuit 9 so that the Note that, as shown in FIG.
The silent data in the storage section 1b is longer than any of the melody data at addresses 1 to 6 in the storage section 1b, and the silent data in the storage section 1b is longer than any of the melody data at addresses 1 to 6 in the storage section 1a.

[0013] Therefore, when the reading of the melody data stored at address 1 of the storage section 1a is completed (
At time point x2 in FIG. 5), the reading of silent data from the storage unit 1b is completed. Subsequently, the central control circuit 9 sets the number of ticks based on the above-mentioned time data, and the readout control circuit 2a repeatedly reads out the ticking sound data at address 8 of the storage section 1a for the set number of times, and the readout control circuit 2b repeatedly reads out the ticking sound data at address 8 of the storage section 1b, and the sounding means 7 generates a ticking sound based on these ticking sound data (step D). In this case, similarly to the above, when the reading of time-based data from one storage section is completed, the reading of time-based data from the other storage section is also completed. FIG. 6 shows an example of each hourly input data read out at 3 o'clock. In this case, the readout timings of the instant data are synchronized.

When the above-mentioned time stamping is completed, the central control circuit 9
As a result, the oscillation of the oscillation circuit 8 is stopped, and the reading operation of the various data described above is completed (step E).

As described above, the prelude and melody are played and the time stamp is performed every hour on the hour. In the above embodiment, the case where two integrated circuits are used has been described, but the present invention is not limited to this, and three or more integrated circuits may be provided.

[0016]

According to the present invention, a data reading operation from a plurality of integrated circuits including a storage section for acoustic data and silent data and a control circuit for reading desired acoustic data or silent data from the storage section is performed. This can be done with a simple configuration, and an increase in the cost of the device can be suppressed.

[Brief explanation of the drawing]

[Fig. 1] Block diagram showing one embodiment of the present invention

[Figure 2]
Explanatory diagram showing the storage contents of storage units 1a and 1b

[Fig. 3] Flowchart for explaining the operation of Fig. 1

[
FIG. 4: Explanatory diagram showing an example of an output signal based on prelude data

[Fig. 5] Explanatory diagram showing an example of an output signal based on melody data

[Fig. 6] Explanatory diagram showing an example of an output signal based on hourly data

[Explanation of symbols]

1a, 1b Storage section 2a, 2b Read control circuit 5a, 5b integrated circuit 7. Pronunciation means 8 Oscillation circuit

Claims (1)

[Claims] 1. A plurality of integrated circuits including a storage section that stores acoustic data and has a silent data storage area, and a control circuit that reads out acoustic data or silent data from the storage section, and each of the integrated circuits. is equipped with a common oscillation circuit and a sound generating means for generating sound based on the acoustic data read out from each of the integrated circuits, the acoustic data is read out from the storage section of one of the integrated circuits, and the other integrated circuits are synchronized with this. An acoustic signal generating device characterized in that it reads silent data from a storage section of an integrated circuit.