JPS63215149A - Digital announcing machine - Google Patents

Abstract

PURPOSE:To eliminate the need of a coder, to miniaturize and economize a device by making it into an electronic circuit, and to save the labor of maintenance, by digitizing an announce message, multiplexing it as a channel at every write announce message, and performing digital switching directly. CONSTITUTION:A voice message, after being converted to an ADPCM signal with the coder and a signal processor, is written on voice memories 80-87, and after recording, the voice memories 80-87 are converted to PCM signals with the signal processor 7, or the voice message is converted to the PCM signal with the coder 4. And the PCM signal is written on the voice memories 80-87 as it is, and after recording, the PCM signal is read out as it is, and the multiplexed voice message is sent to a highway of 2Mb/s as a digital signal of 64kb/s, and the digital message in a form of the digital signal as it is connected to a digital switching network. In such a way, the coder is eliminated at an announcing machine.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an announcement machine used in a digital switching system.

[Conventional technology]

A conventional announcement machine is an announcement machine using an analog type cassette deck, and outputs analog audio by setting a cassette tape on which announcement messages are recorded in analog audio.

(Problems to be Solved by the Invention) The conventional announcement machine described above uses an analog cassette tape and outputs analog audio, and therefore has the following drawbacks.

(1) In order to connect to the time division switch of the digital exchange, coders for converting into digital signals are required as many as the number of announcement messages.

(2) The lifespan of cassette tapes in frequently used announcement machines is short, lasting from six months to a year.

(3) Periodic inspection and repair of the cassette deck requires a large amount of man-hours.

(4) The cassette deck is large and requires the same number of announcement messages.

(5) It is expensive.

[Means for solving problems]

The digital announcement machine of the present invention includes a coder that converts a recorded analog audio announcement message into a PCM signal, an audio memory, and a voice output from the announcement message converted to a PCM signal as it is or by converting it into an ADPCM signal. an audio memory control circuit that writes PCM signals into a memory and sequentially reads and outputs PCM signals from the written audio memory upon completion of writing of all announcement messages, or sequentially reads DPCM signals and converts them to PCM signals and outputs them; L (Systemically output from the I fi11 circuit 1) Inputs the announcement message of the CM signal, assigns it to the time slot of the preset channel, and outputs the P
A time slot selection circuit that outputs a CM multiplexed audio signal, and a multiplexed P output from the time slot selection circuit.
A highway interface circuit inputs announcement messages of CM signals and outputs them to a PCM multiplex line connected to a time division switch, and a maintenance name is voice memory 1I.
A group of switches for setting the signal conversion information of the IJI11 circuit, the voice memory to be written, and the channel of the announcement message to be output; and a voice memory control circuit, voice memory, and time slot selection circuit based on the settings in the switch group. and a timing circuit that supplies clocks for digital conversion and multiplexing to each part.

[Effect]

By digitizing and writing the announcement message, multiplexing it as a channel for each announcement message, and performing direct digital switching, a coder is no longer required, and the device is made into an electronic circuit, making it more compact, economical, and labor-saving for maintenance. It will be planned.

〔Example〕

Next, the present embodiment will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the digital announcement machine of the present invention.

The coder 4 converts an announcement message from an external device such as a microphone or tape deck into a PCM signal via a receiving transformer 2 and a receiving amplifier 3. signal processor 7
Converts the announcement message converted into a PCM signal by the coder 4 to A I) PCM, writes it to the designated audio memories 80 to 87, and converts the ADPCM signal read from the designated audio memory to a PCM signal. .

The time slot selection circuit 10 converts the PCM signal announcement message output from the signal processor 7 into a designated time slot of the PCM30 channel system and outputs the time slot. The control circuit 17 specifies the audio memory to which the signal processor 7 writes/reads based on the settings of the recording switch 18, the channel selection switch 10, and the command switch 20, and specifies the channel in the time slot selection circuit 10. The highway interface circuit 11 transfers the multiplexed announcement message output from the time slot selection circuit 10 to a 2 Hb/S PCM line connected to a time division switch (not shown). The drive circuit 12 outputs the highway data 26 together with a 2 Hb/S clock 27.8 Kb/S frame pulse 28 from the drive circuit 13.14. The detection circuit 5 monitors the level of the receiving amplifier 3 during recording, and lights up the level detection LED 6 when an abnormality is detected. The decoder 15 decodes the PCM signal output from the time slot selection circuit 10 according to the designation of the control circuit 17, and outputs the PCM signal to the monitor amplifier 16 and monitor transformer 24.
The audio signal is then output as a monitor audio output 25. The timing circuit 21 connects the 2 Hb/S highway to the 2 Hb/S highway.
A b/S frame pulse 30 is input to the S clocks 29 and 8, and necessary timing pulses are supplied to the signal processor 7, time slot selection circuit 10, highway interface circuit 11, drive circuits 12 to 14, and control circuit 17. The clock interruption detection circuit 22 monitors this timing pulse, and lights up the alarm LED 23 if there is an abnormality. Note that the battery 9 is used to prevent memory destruction of the audio memories 80 to 87 due to a power outage.

Next, the operation of this embodiment will be explained.

First, a maintenance person specifies, for example, the audio memory 81 with the recording switch 18, and then inputs an announcement message from a tape deck of an external device.
The signal is input to the signal processor 7, is converted into a PCM signal, and is output to the signal processor 7. This PCM signal is converted into an ADPCM signal by the signal processor 7 and written into a pre-designated audio memory 81. When the above operations are repeated and writing of each announcement message to the voice memory is completed, the maintenance person specifies the channel for each announcement message using one channel selection switch. The contents of the audio memories 80 to 87 are sequentially read out by the signal processor 7, converted into PCM signals, and input to the time slot selection circuit 10. After each announcement message is multiplexed as a PCM signal for each channel in the time slot selection circuit 10, the highway interface circuit 11 multiplexes the 2 Hb/S PCM signals connected to the time division switch.
The 2 Hb/S clock 27.8 and the b/S frame pulse 28 are output to the multiplex lines by the drive circuits 12-14. This output is selected by a time division switch and connected to the desired subscriber.

Note that in this embodiment, in order to reduce the amount of audio memory, A
If DPCM is used, but the recording time is short and there is no particular need to reduce the audio memory, use a simple control circuit instead of the signal processor 7 to fill the audio memories 80 to 87 with PCM signals. You may also write it.

〔Effect of the invention〕

As explained above, the present invention converts a voice message into an ADPCM signal using a coder and a signal processor, writes it into the voice memory, and when recording is completed, converts the voice message into a PCM signal using a signal processor, or converts the voice message into a PCM signal using a coder. Convert it to a PCM signal, write it as a PCM signal to the audio memory, stop recording, read it as a PCM signal, and convert it to a 64 Kb/S digital signal at 2 Hb/S.
Sends a multiplexed voice message to the S highway,
By connecting the announcement message as a digital signal to a digital switching network, the following effects can be obtained.

(1) There is no need for a coder on the announcement machine side.

(2) Compared to analog announcement machines, the reliability and second floor life are much more cloudy.

(3) It becomes possible to use electronic circuits, making it more compact and more economical.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the digital announcement machine of the present invention. 1... Recording personnel (microphone, tape deck, etc.) 2
...Receiving transformer, 3...Receiving amplifier, 4
... coder, 5 ... detection circuit, 6
. . . Level detection LED, 7. Signal processor, 80 to 87. Audio memory, 9. Battery, 10.
...Time slot selection circuit, 11...Highway interface circuit, 12-14
...Drive circuit, 15...Decoder, 16...
Monitor amplifier, 17... Control circuit, 18...
Recording switch, 19...Channel selection switch, 20...Command designation switch, 21...Timing circuit, 22...Clock disconnection detection circuit, 23...Alarm LED. 24...Monitor transformer, 25...Monitor audio output, 26...2 Hb/S highway data, 27...
2 Hb/S clock, 28...8 Kb/S frame pulse, 29...2
Hb/S clock, 30...8Kb/S frame pulse. death

Claims (1)

[Claims] In a digital exchange, there is provided a coder that converts an announcement message of a recorded analog voice signal into a PCM signal, a voice memory, and an announcement message that is converted into a PCM signal either directly or after being converted into an ADPCM signal. PCM signals are written in the voice memory, and upon completion of writing all announcement messages, the PCM signals are sequentially read out from the written voice memory and output, or ADPCM signals are sequentially read out and the PCM signal is output.
An audio memory control circuit that converts into a signal and outputs it, and an announcement message of the PCM signal continuously output from the audio memory control circuit is input, assigned to a preset channel time slot, and output as a PCM multiplexed audio signal. A time slot selection circuit to output, and a multiplexed P output from the time slot selection circuit.
A highway interface circuit inputs the announcement message of the CM signal and outputs it to the PCM multiplex line connected to the time division switch, and a maintenance person inputs the signal conversion information of the voice memory control circuit, the voice memory to be written, and the announcement to be output. a group of switches for setting a message channel; a control circuit for controlling an audio memory control circuit, an audio memory, and a time slot selection circuit based on settings in the switch group; and a clock for digital conversion and multiplexing. A digital announcement machine with a timing circuit that supplies each part.