DE9314438U1 - Small device for playing music and speech - Google Patents

Description

PATENT ATTORNEYS

HAUCK, GRAApFSl'JwEfi^K·'?· ©bR^cf.; BBHHES HAMÖtöfe - ÄOTNCftEN - ⁴ OUSSELObRF* *

Wolfgang Beyer KG COM-ELECTRONIC Company for

Kaiserstraße 18 Communication and Information

40764 Langenfeld systems mbH

Niedenstrasse 58 a

40721 Hilden

Attorney file: Dn-1661 Düsseldorf, 23.09.1993

Small device for playing music and speech

The present innovation concerns a device for playing music and speech onto the waiting loop of telephone systems, onto which the caller is placed when the call is transferred, with a power supply, a memory for storing digitized music and speech, a D/A converter stage, an analogue part and an interface.

Such devices are used in telephone systems to implement the "music on hold" feature when a subscriber is put on hold when a call is transferred. A continuously running music program with intervening hold requests is played on this hold via an interface adapted to the corresponding communications system.

The known device has a power supply in which the 220 V mains voltage is converted to the system voltages. The device's memory is divided into three areas, a program memory, a

Voice memory and a music memory. The assembler operating system is housed in a read-only memory in the program memory. The voice memory in the form of a read-only memory stores the digitized wait requests. The music memory is housed in a replaceable music module. An 8-bit microcontroller acts as the CPU for the well-known device, which performs the control functions and calculations. In the converter stage, the digital information is converted into NF signals. The analog part has a filter that influences the volume and sound. As an amplifier, an output stage increases the output signal to such an extent that the downstream output transformer works correctly.

The music module is replaceable and is inserted into a module slot on the back of the device.
15

These well-known devices available on the market work satisfactorily.

The invention is based on the object of creating a device of the specified type that is particularly simple in design and operates without disruption.

This task is solved in accordance with the innovation in a device of the type described above in that the device is designed without a microcontroller and has a module that can be plugged into a slot in the base unit, which module has the memory, a shift register connected to it via a data bus, an address decoder connected to the memory via an address bus and a clock line between the address decoder and the shift register, and that the base unit has the power supply, the interface, the analogue part, the

D/A converter stage, which are connected in series, and a clock generator, wherein the D/A converter stage and the clock generator can be connected via connectors to the shift register or the address decoder of the module.

The newly designed device is very simple in design, as it does not have a microcontroller, and is therefore not susceptible to failure. The replaceable module contains the digital part of the device, with the corresponding music and voice signals being permanently stored in the memory, for example in a fixed program sequence as follows:

1. Waiting request

2. Piece of Music I

3. Waiting request
4. Piece of Music I

5. Waiting request

6. Piece of Music II

24. Piece of Music VI
1. Beginning

According to this program scheme, a program sequence of up to 128 see.

The associated clock generator is housed in the base unit. It sets the clock for reading the digitized music and voice data from the memory, which is then read into the shift register in order to be output from there. For this purpose, a data bus is connected between the memory and

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Shift registers are provided. The corresponding addressing is carried out via an address decoder, which is connected to the memory via an address bus. The address decoder and shift register are connected via a clock line.

The selected digitized music or voice data is sent from the shift register via the corresponding connectors on the module and the base unit to a D/A converter in the base unit, which converts the data into analog signals. The analog signals are processed accordingly in the analog part of the base unit and fed to an interface for the corresponding communications or telephone system, which also has a power supply.

In a further development of the innovation, the analog part has an amplifier, a sound control unit including volume control and a filter. The filter is a high-pass and/or low-pass filter. From the perspective of the receiver, the filter is connected downstream of the D/A converter stage. The filtered signals are sent to the component containing the sound control unit and the volume control and can be manually adjusted in terms of sound and volume. From this component, the signals are fed to an amplifier, in which they are boosted to such an extent that suitable NF signals are permanently made available at the subsequent interface for the waiting loop of the corresponding communication or telephone system. 25

The memory for the digitized music and voice signals is preferably an EPROM or a FLASH MEMORY.

An RC element is used as a clock generator. 30

In a further development of the innovation, the module is designed as a card that can be inserted into a slot provided on the front of the base unit. When inserted, a contact is made between the two connectors (connections of the shift register and address decoder) of the card and two connectors of the base unit, which on the one hand lead via the D/A converter stage to the analog part and on the other hand to the clock generator (oscillator).

The newly designed device has, for example, a 600 ohm interface. The card technology used enables the music and waiting requests to be changed quickly and easily. The transmission rate is 64 kbit/sec. This value guarantees high-quality and consistently good playback of music and speech. The simple structure means that the system is largely wear-free and trouble-free.

To start using the device, the corresponding card is inserted into the slot of the base unit. The device is then connected to the corresponding power supply, for example via an integrated power supply or a separate power supply. Finally, the cable connection is established between the associated communications system and the device, for example using a TAE plug. The device is then ready for use.

The volume and tone can be adjusted using the controls provided on the device.

The innovation is explained in detail below using an example in conjunction with the drawing. They show:

Fig. 1 is a schematic spatial representation of a device designed in accordance with the innovation; and

Fig. 2 a block diagram of the base unit and module. 5

As can be seen from Fig. 1, the device designed in accordance with the new design consists of a base unit 1 and an associated plug-in module, which is designed as a plug-in card 3. This plug-in card can be inserted into a slot 2 provided on one end of the base unit 1. The device is made ready for operation by inserting the card 3 into the base unit.

The base unit consists of a flat housing that has the corresponding connections to the power supply and the associated communication or telephone system. These connections are not shown in Fig. 1. The device also has two control buttons 4 and 5 on the back for adjusting the volume and tone.

The circuit design of the base unit 1 and the plug-in card is shown in Fig. 2. The plug-in card 3 is provided with a memory (EPROM) in which digitized music and speech are stored. A data bus 22 leads from the memory 14 to a shift register 13, while an address bus 23 leads from the memory 14 to an address decoder 18. The address decoder is connected to a connector 17, while the shift register 13 is connected to a connector 12. The shift register and address decoder are connected to one another via a clock line 24.

When inserting the plug-in card 3 into the slot of the base unit 1 30

the connectors 12, 17 of the card come into contact with the corresponding connectors 11, 16 of the base unit. The connector 17 of the card is connected to the connector 16 of the base unit, which is connected to an RC element acting as a clock generator 15. The clock generator 15 provides a corresponding clock for reading the digitized data in the memory 14, which is read into the shift register 13, to be read out from there and fed to a digital/analog converter stage 10 via the connectors 12, 11. The corresponding digitized data is converted here into analog signals and reaches the analog part 6 of the base unit, which contains a filter 21 (high-pass and/or low-pass filter), a module 20 with a tone control and volume control and an amplifier 19. The signals from the amplifier reach an interface 7 and are permanently available there as NF output signals. These signals are fed to the waiting loop of a telephone system via a line 9. The device is supplied with power via line 8.

Claims (5)

HAUCK, GRAASLFS, WEHNERT, BORiNG, HAMBURG - MUNICH - DUSSELDORF Wolfgang Beyer KG COM-ELECTRONIC Company for Kaiserstraße 18 Communication and Information 40764 Langenfeld systems mbH Niedenstrasse 58 a 40721 Hilden Attorney file: Dn-1661 Düsseldorf, 23.09.1993 Protection claims 1. Device for playing music and speech onto the waiting loop of telephone systems, onto which the caller is placed when the call is transferred, with a power supply, a memory for storing digitized music and speech, a D/A converter stage, an analog part and an interface, characterized in that the device is designed without a microcontroller and has a module (3) which can be plugged into a slot (2) of the base device (1), which module has the memory (14), a shift register (13) connected thereto via a data bus (22), an address decoder (18) connected to the memory (14) via an address bus (23) and a clock line (24) between the address decoder (18) and the shift register (13), and that the base device (1) has the power supply, the interface (7), the analog part (6), the D/A converter stage (10), which are connected in series, and a clock generator (15), wherein the D/A converter stage (10) and the clock generator (15) can be connected to the shift register (13) or the address decoder (18) of the module (3) via connectors (11, 12; 16, 17). • · · — au-· ··· 2. Device according to claim 1, characterized in that the analog part (6) comprises an amplifier (19), a sound control unit including volume control (module 20) and a filter (21). 3. Device according to claim 1 or 2, characterized in that the memory (14) is an EPROM or a FLASH MEMORY. 4. Device according to one of the preceding claims, characterized in that the clock generator (15) is an RC element. 5. Device according to one of the preceding claims, characterized in that the module (3) is designed as a card.