KR950003322B1 - Volume control method of keyphone - Google Patents

Abstract

The circuit reduces the manufacturing cost of key phone, and adjusts voice signal. The circuit includes a CPU, a PCM connection/user line connector, a digital data transmit/receive block, a controller which saves the selection data and gain adjust variable data, and generates the multi clock signal and latch signal, a PCM data receiver which outputs PCM data, a gain adjust block which outputs adjusted PCM data.

Description

1 is a block diagram of a volume control device for a digital key phone system according to the present invention.

2 is a configuration diagram of the PCM switching / volume adjusting unit shown in FIG.

3 is a flowchart of a volume control operation of the central control unit shown in FIG.

* Explanation of symbols for main parts of the drawings

10: main unit 11: PCM switching / volume control unit

12: central control unit 13: PCM connection / user line connection

14: digital data transmission and reception unit 20: key phone telephone

30 control unit 40 PCM data receiving unit

50: gain control unit 60: PCM data transmission unit

[Name of invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital keyphone system, and more particularly, to a volume control method and a circuit of a digital keyphone system for digitally controlling various voice signals such as a call voice signal and a ring signal supplied from a keyphone main device to a keyphone telephone. .

In order to adjust the volume in a conventional keyphone system, an analog volume switch composed of a variable resistor or a digital volume controller that can adjust a resistance step by step is installed in a key phone, and the volume control switch is moved to change the resistance of the variable resistor. The volume was controlled by changing the gain ratio of the analog amplification circuit by adjusting the volume or pressing the digital volume control button to change the internal resistance of the digital volume controller.

In the conventional key phone system, the volume control method requires a volume control switch or a digital volume controller to be installed in the key phone, so that it occupies a lot of space mechanically and the number of types of voice signals when adjusting a plurality of voice signals such as voice signals and ring signals. As long as the analog volume switch or digital volume controller has to be installed, there was a problem in that the production cost is high.

The present invention has been made in view of the above-described problems, and when there is a volume control request in any key phone without installing a separate volume controller for each key phone, the volume control request according to the corresponding volume control request data in the key phone main unit. It is an object of the present invention to provide a volume control method and a circuit of a digital key phone system which can reduce the volume of a key phone and at the same time reduce the volume of the key phone by adjusting various voice signals supplied to one key phone.

In order to achieve the above object, the present invention provides a volume control method of a digital keyphone system, in which the voice data, tone data, and ring data of a predetermined level for adjusting the output volume of the keyphone telephone are set in the memory means of the main apparatus in the PCM method. And a second step of determining whether the detected key signal is a key signal for selecting a volume control when the main device detects an input of a key signal applied from a predetermined key phone after the first step. And if the key signal detected in the second step is not a key signal for selecting the volume control, perform an operation corresponding to the detected key signal, and if the detected key signal is a key signal for selecting the volume control, Analyzes the volume control signal, compares the corresponding volume control data with the memory means, and then uses the keyphone at the selected volume control level. It provides a volume adjustment of a digital phone system characterized in that it comprises a third step of adjusting the volume of the firearm.

In addition, the present invention is a key phone system comprising a main unit having a central control unit, a PCM connection / user line connection unit and a digital data transmission and reception unit and a plurality of key phone telephones, from the predetermined key phone telephone through the digital data transmission and reception unit through the central control unit; Control unit for storing multiplexed line selection data and gain control variable data supplied from the central control unit and generating a multiplexed clock signal and a plurality of latch signals according to a separately inputted frame synchronization signal and control clock when the volume control request data is supplied to the controller. When the first latch signal is supplied from the control unit, the PCM data supplied from the PCM connection / user line connection unit is serially converted and multiplexed according to the multiplexing line selection data read from the control unit. PCM data receiver and gain group to do PCM data stored in the stored PCM data and supplied from the PCM data receiver when gain control variable data read from the controller is supplied from the controller and a third latch signal is supplied from the controller when the second latch signal is supplied from the controller. A gain adjusting unit for selecting and outputting the gain-controlled PCM data addressed by the data, and from the gain adjusting unit according to the multiplexed line selection data read from the control unit when a fourth latch signal is supplied from the control unit. After multiplexing the supplied PCM data is converted into a serial in accordance with the multiplexed clock signal supplied from the control unit and the PCM data transmission unit for outputting the volume control request to the key-phone phone side through the PCM connection / user line connection unit and the digital data transmission and reception unit Digital key phone characterized in that Provides a volume control circuit for the system.

By such a method and configuration, the present invention provides the volume control request data set in the keyphone main device to the keyphone phone when the volume control request is made in any keyphone phone without installing a separate volume controller. By controlling various voice signals, the volume of the keypad is reduced and at the same time the cost of manufacturing the keypad is reduced.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a volume control device of a digital key phone system according to the present invention, FIG. 2 is a block diagram of a PCM switching / volume control unit shown in FIG. 1, and FIG. 3 is a volume control operation of the central control unit shown in FIG. It is a block diagram of the flowchart. As shown in FIG. 3 and FIG. 1, the volume control device of the digital keyphone system includes a PCM switching / volume control unit 11, a central control unit 12, a PCM connection / user line connection unit 13 and a main unit 10. A digital data transmission / reception unit 14 is provided, and the telephone phone 20 includes a control unit 21, a key input unit 22, a digital data transmission / reception unit 23, an analog switching unit 24, a handset circuit unit 25, and a speaker. This is achieved by providing the phone circuit section 25 and the signal conversion section 27. The control unit 21 controls the overall operation of the key phone 20. When a key is input, the control unit 21 recognizes a key signal input from the key input unit 22 and transmits the corresponding data through the digital data transmission / reception unit 23. The digital data transmitter 14 is connected to the digital data transmitter 14, and the analog switching unit 24 is controlled to connect the signal converter 27 to the speaker phone circuit 26 or the handset circuit 25.

The signal conversion unit 27 converts the analog signal supplied from the analog switching unit 24 into digital data, outputs it to the digital data transmission / reception unit 23, and outputs the digital data supplied from the digital data transmission / reception unit 23. The signal is converted into an analog signal and output to the analog switching unit 24. The digital data transmission / reception unit 14 of the main device 10 outputs the digital data supplied from the PCM connection / user line connection unit 13 to the digital data transmission / reception unit 23 side of the key phone 20, and the control unit 21. The digital data supplied through the digital data transmission / reception unit 23 is outputted to the central control unit 12 side. The central control unit 12 analyzes what data is supplied from the digital data transmission / reception unit 14 and controls the volume by controlling the PCM switching / volume control unit 11 in the case of data related to the volume control and other functions. If the data requires a different function. When the key to adjust the volume is input to the key input unit 22, the central controller 12 first analyzes the current state of the key phone 20 and ignores the volume control key input when the key phone 20 is not in use. And do not perform any operation, and outputs data for adjusting a voice signal to the PCM switching / volume control unit 11 when the user is in a call state using a handset or a speakerphone, and a ring or tone signal is transmitted to the keyphone telephone 20. In the state of being supplied to the side, data for adjusting the ring or tone signal is output to the PCM switching / volume control unit 11 side. The PCM connection / user line connection unit 13 outputs the multiplexed PCM voice, ring signal and tone data input separately to the PCM switching / volume control unit 11, and is supplied from the PCM switching / volume control unit 11 side. The multiplexed PCM data is outputted to the key phone 20 through the digital data transmission / reception unit 14.

The PCM switching / volume adjusting unit 11 adjusts the volume of the voice, ring signal and tone signal in accordance with the data supplied from the central control unit 12, which is configured as shown in FIG. As can be seen in FIG. 2, the PCM switching / volume adjusting unit 11 is configured to be connected to the control unit 30, the PCM data receiving unit 40, the gain adjusting unit 50, and the PCM data transmitting unit 60. The control unit 30 supplies various data supplied from the central control unit 12 to the PCM data receiving unit 40, the gain adjusting unit 50, and the PCM data transmitting unit 60, and separately inputs a frame synchronization signal and a control clock. By supplying the control signal generated by the PCM data receiving unit 40, the gain adjusting unit 50 and the PCM data transmitting unit 60 to control the overall operation of the PCM switching / volume adjusting unit 11, 31), a control data storage memory 32, a multiplexer 33, a control / multiplexed line clock generation circuit 34 and a data latch 35. The PCM data receiving unit 40 selects the desired PCM data from the multiplexed PCM data supplied from the PCM connection / user line connection unit 13 according to the data supplied from the control unit 30 and the control signal, and then adjusts the gain control unit 50. It is supplied to the side, and is connected to the data latch 41, the serial / parallel conversion circuit 42, and the multiplexer 43. The gain controller 50 controls the PCM voice, ring signal, and tone data gain-adjusted according to the data supplied from the controller 30 and the PCM data receiver 40 and the control signal supplied from the controller 30. It is supplied to the transmitter 60 side, and is connected to the gain control variable latch 51, the PCM data latch 52, and the gain control ROM 53. The PCM data transmitter 60 multiplexes the PCM voice, ring signal, and tone data supplied from the gain control unit 50 according to the data and control signals supplied from the controller 30 to connect the PCM connection / user line. And a data latch 61, a multiplexer 62, and a parallel / serial conversion circuit 63.

When there is a volume control request from the key-phone telephone 20, the central controller 12 sequentially supplies the multiplexed line selection data and the gain control variable data to the data latch 35 side through the data bus and supplies the address signal to the address storage latch. When supplied to the (31) side, the control / multiplexing line clock generation circuit 34 receives the data latch 35 through the port P1 in accordance with the frame synchronization signal supplied to the port P8 and the control clock supplied to the port P9. And the multiplexing line selection data supplied from the central controller 10 to the data latch 35 side by supplying the latch signal to the multiplexer 33 side and outputting the selection control signal to the multiplexer 33 side through the port P10. And gain control variable data are sequentially stored in a control data storage memory 32 consisting of RAM. The serial / parallel conversion circuit 42 of the PCM data receiving unit 40 converts the PCM data supplied in series from the PCM connection / user line connection unit 13 in parallel and outputs them to the multiplexer 43, where the control unit 30 ) When the latch signal is supplied from the port P5 of the control / multiplexed line clock generation circuit 34 to the data latch 41 side, the control / storage data stored in the control data storage memory 32 of the control unit 30 corresponding to the data latch 41 is stored. The multiplexing line selection data is received and the multiplexer 43 is controlled to multiplex the PCM data supplied from the serial / parallel conversion circuit 42 and output to the PCM data latch 52 side of the gain control unit 50. Again, a latch signal is supplied from the port P2 of the control / multiplexing line clock generation circuit 34 of the control section 30 to the gain control variable latch 51 of the gain control section 50 and generates the control / multiplexing line clock. When the latch signal is supplied from the port P3 of the circuit 34 to the PCM data latch 52 side of the gain control unit 50, the gain control variable latch 51 is controlled by the control data storage memory 32 of the control unit 30. Take the gain control variable data stored in the control panel) and output the gain control variable data to the gain control ROM 53 side of the gain control unit 50, and the PCM data latch 52 is supplied from the multiplexer 43 of the PCM data receiver 40. The data is output to the gain control ROM 53 side of the gain adjuster 50.

The gain control unit ROM 53 stores data for adjusting the gain of the PCM data supplied from the PCM data receiving unit 40 and is supplied from the gain control variable latch 51 of the gain control unit 50. Data corresponding to the data and the data supplied from the PCM data latch 52 are addressed to the multiplexer 62 side of the PCM data transmitter 60. At this time, when the latch signal is supplied from the port P4 of the control / multiplexing line clock generation circuit 34 of the control unit 30 to the data latch 61 side of the PCM data transmission unit 60, the data latch 61 controls the control unit. The multiplexed line data stored in the control data storage memory 32 of 30 is received and outputted to the multiplexer 62 side of the PCM data transmitter 60. Accordingly, the multiplexer 62 multiplexes the PCM data supplied from the gain control ROM 53 of the gain control unit 50, outputs the multiplexer 62 to the parallel / serial conversion circuit 63 side of the PCM data transmitter 60, and controls the controller ( The parallel / serial conversion section is supplied when the multiplexed clock signal is supplied from the ports P6 and P7 of the control / multiplexing line clock generation circuit 34 to the parallel / serial conversion circuit 63 of the PCM data transmitter 60. 63 converts the PCM data supplied in parallel from the multiplexer 62 in series and multiplexes them, and outputs them to the PCM connection / user line connection unit 13 as shown in FIG.

The PCM data supplied from the parallel / serial conversion circuit 63 in the PCM data transmission section 60 of the PCM switching / volume control section 11 to the PCM connection / user line connection section 13 is transferred to the digital data transmission / reception section 14. It is supplied to the digital data transmission / reception unit 23 side of the key phone telephone 20 through the control unit. The digital data transmission / reception unit 23 outputs the PCM data supplied from the digital data transmission / reception unit 14 of the host device 10 to the signal conversion unit 27, and the signal conversion unit 27 is the digital data transmission / reception unit 23. And converts the data from the analog signal into an analog signal and outputs it to the speakerphone circuit unit 26 or the handset circuit unit 25 through the analog switching unit 27.

Volume control method and circuit of digital key phone system

Claims (2)

A volume adjusting method of a digital key phone system, comprising: a first step of setting voice data, tone data, and ring data in a predetermined step for adjusting an output volume of a key phone in a memory means of a main device, and performing the first step; After the main device detects an input of a key signal applied from a predetermined key phone, a second step of determining whether the detected key signal is a key signal for selecting a volume control, and the key detected in the second step If the signal is not a key signal for selecting the volume control, an operation corresponding to the detected key signal is performed. If the detected key signal is a key signal for selecting the volume control, the selected volume control signal is analyzed and the corresponding volume control is performed. And a third step of adjusting the output volume of the key-phone telephone to the selected volume control level after reading and comparing the data from the memory means. Volume control method of the digital keyphone system characterized in that it comprises. A key phone system comprising a main unit having a central control unit, a PCM connection / user line connection unit, and a digital data transmission / reception unit and a plurality of key phone telephones, wherein volume control request data is received from a predetermined key phone telephone to the central control unit via the digital data transmission / reception unit. A control unit for storing the multiplexed line selection data and the gain control variable data supplied from the central control unit and generating a multiplexed clock signal and a plurality of latch signals according to a frame synchronization signal and a control clock separately inputted when When the first latch signal is supplied from the PCM data receiving unit for converting and multiplexing the PCM data serially supplied from the PCM connection / user line connection unit in accordance with the multiplexing line selection data read from the control unit and output Gain-controlled PCM data When the second latch signal is stored and supplied from the control unit, addressing is performed by the gain control variable data read from the control unit and the PCM data received from the PCM data receiving unit when the third latch signal is supplied from the control unit. A gain control unit for selecting and outputting the gain-controlled PCM data and the PCM data supplied from the gain control unit according to the multiplexed line selection data read from the control unit when a fourth latch signal is supplied from the control unit; And a PCM data transmitter for multiplexing and converting the signal serially according to the multiplexed clock signal supplied from the controller and outputting the volume control request to the key phone telephone through the PCM connection / user line connection unit and the digital data transmission / reception unit. Volume of digital key system Section circuits.