JP2932026B2 - Key telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone apparatus having a voice mail apparatus for recording and reproducing voice messages.
About the installation .

[0002]

2. Description of the Related Art A voice mail device that uses a voice storage memory to record or play back voice signals in the voice storage memory uses a recording / playback LSI (hereinafter referred to as a recording / playback LSI). Have been. This recording / playback LSI is
When recording an audio signal, this analog audio signal is digitized, the data is further compressed by signal processing and recorded as audio data in the audio storage memory, and when the audio signal is reproduced, read from the audio storage memory. The expanded audio data is converted into an analog signal and reproduced as an audio signal. FIG. 4 is a diagram showing a connection configuration between such a recording / reproducing LSI 21 and a voice storage memory (RAM) 30. One voice storage memory 30 is connected to one recording / playback LSI 21. It has a configuration. Here, the recording / reproducing LSI 2 records and reproduces an audio signal with respect to an audio storage memory under the control of the CPU 40.

[0003]

A conventional voice mail apparatus using a voice storage memory has a unit configuration in which a recording / reproducing LSI and a voice storage memory are connected one-to-one. Therefore, there is a problem that a plurality of voice messages cannot be simultaneously recorded or reproduced because one recording / playback LSI occupies one voice storage memory.

Accordingly, an object of the present invention is to enable simultaneous recording and playback of a plurality of voice messages, and to enable playback of another voice message while recording of a certain voice message is being executed.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a main unit of a key telephone apparatus having a main unit for accommodating an outside line and a key telephone connected to the main unit. A plurality of recording / reproducing circuits for encoding and compressing audio signals and for expanding and decoding compressed audio data, and a RAM (audio storage memory) for storing audio data
And, in each recording and playback circuit between each recording and playback circuit and RAM
A plurality of dual-port RAMs arranged correspondingly for storing a predetermined amount of audio data from a recording / reproducing circuit or a RAM
And store the audio data from each recording / reproducing circuit in the RAM.
That during the recording of the audio signal of the sound data of the dual port RAM connected to the recording and playback circuits which are accessed
The transfer to the RAM is sequentially performed in a time-division manner ,
These audio data are transferred to each recording / playback circuit and decoded
At the time of audio signal playback, each recording and playback circuit accessed
From RAM for each connected dual port RAM
Transfer means for sequentially transferring the audio data in a time-division manner, detecting means for detecting that a predetermined amount of audio data has been stored in the dual port RAM, and output of the detecting means for recording.
For each transfer instruction to the transfer means and for playback
Is provided with transfer instruction means for executing a transfer instruction to the transfer means based on the output of the detection means until there is no more voice data.

[0006]

When recording or reproducing an audio signal by accessing an audio storage memory via each recording / reproducing circuit, transfer of audio data between each buffer memory connected to each accessed recording / reproducing circuit and the audio storage memory is performed. It is performed by a predetermined amount and time-divisionally. As a result, it is possible to simultaneously access the voice storage memory from a plurality of recording / reproducing circuits, thereby enabling simultaneous recording and reproduction of a plurality of voice messages.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. Figure 3 is a block diagram of the engaging Rubo Tan telephone apparatus according to the present invention. In the figure, a main device 1 has a plurality of external lines 21 to
2n is connected, and a plurality of key telephones and single telephones 41 to 4m are connected. Here, in the main device 1, each of the external line interfaces 111 to 11n, the communication path switch 12, each of the telephone interfaces 131 to 13m,
A CPU 14, a ROM 15, a RAM 16, and a voice mail device 17 are provided, and under the control of the CPU 14, call processing such as an external call or an internal call is executed. The voice mail device 17 connected to the communication path switch 12 can record a plurality of voice messages, and can simultaneously record voice messages from a plurality of external lines via the communication path switch 12, Simultaneous reproduction by a plurality of key telephones is possible.

The key telephone 4 also has a call circuit 3
1, a transmission circuit 34, a control unit 35, a display circuit 36, a keyboard 37, and the like are provided, and perform external calls and internal calls under the control of the main device 1 while performing data transmission with the main device 1. I have.

FIG. 1 is a block diagram showing an embodiment of the present invention, and shows the configuration of the voice mail apparatus 17 shown in FIG. In this figure, this apparatus comprises a plurality of recording / reproducing units (hereinafter referred to as recording / reproducing units) 201 to 20n connected to respective communication paths of a communication path switch 12 in the main apparatus 1.
, A RAM 30 serving as an audio storage memory, a CPU 40, and a DMA controller 5 for performing block transfer of audio data
0, a decoder 60 for decoding an address signal from the CPU 40. In addition, each recording / playback unit 2
Recording / playback LSI 21 for performing A / D conversion and D / A conversion, compression and decompression of audio signals, RAM 3
FIFO 22 for temporarily storing audio data from 0 and outputting it to the recording / reproducing LSI 21, and FIFO 2 for temporarily storing audio data from the recording / reproducing LSI 21 and outputting to the RAM 30
3 and gate circuits 24 and 25 are provided.

A RAM 30 for storing audio data
Is divided into a plurality of areas so that audio data passing through a plurality of recording / reproducing units can be separately stored. Here, the CPU 14 in the main device 1 sends a voice message arriving at, for example, the recording / reproducing unit 201 among the recording / reproducing units connected to the ports of the communication path switch 12 to the CPU 40 in the voice mail device 17. RAM3
When the instruction to record to 0 is issued, the CPU 40 instructs the recording / reproducing LSI 21 and the FIFO 23 in the unit 201 to record the voice message. Then, the recording / reproducing LSI 21 digitizes and compresses the analog voice message and sends it to the FIFO 23. The compressed audio data is sequentially stored in the FIFO 23. When a predetermined amount of audio data, that is, audio data corresponding to half of the total capacity of the FIFO 23 is stored, the FIFO
The OHA 23 outputs a “HALF” signal to the CPU 40.

When the CPU 40 detects the "HALF" signal by sensing or interrupting, the CPU 40 instructs the DMA controller 50 to store the data stored in the FIFO 23 in the RAM 23.
An instruction is given to perform block transfer to a predetermined area of No. 30. As a result, the audio data stored in the FIFO 23 is
MA controller 50 via data bus BS
The data is transferred to a predetermined area of the AM 30 and stored therein.
The next audio data from the recording / reproducing LSI 21 is stored in the FO 23. Then, the next audio data is similarly transferred to the next area in the predetermined area of the RAM 30 by the DMA controller 50 and accumulated. By repeating such processing operations, audio signals are sequentially recorded in a predetermined area in the RAM 30.

Next, the CPU 14 instructs the CPU 40
When an instruction to send audio data stored in a predetermined area of the AM 30 to a key telephone is given through, for example, the recording / reproducing unit 20n and the communication path switch 12 connected thereto, the CPU 40 causes the DMA controller 50 and the recording It instructs the FIFO 22 and the recording / reproducing LSI 21 in the reproducing unit 20n to reproduce the voice message. Then
The DMA controller 50 reads out audio data from a predetermined area of the RAM 30 and performs FIFO reading via the data bus BS.
The audio data is read out from the FIFO 22 by the recording / reproducing LSI 21 and decompressed, converted into an analog signal, and converted into an analog signal.
2 to the key telephone.

When a predetermined amount of audio data has been stored in the FIFO 22, a "HA"
LF "signal is output to CPU 40. When the CPU 40 detects this signal as a sense or an interrupt, it determines that the stored audio data has already been processed by the recording / reproducing LSI 21 and has been output to the telephone side. An instruction to transfer the audio data in the area to the FIFO 22 is issued.
As a result, the audio data is transferred to the FIFO 22,
The signal is converted to an analog signal by the recording / playback LSI 21 and output to the key telephone. As described above, when the audio data in the RAM 30 is reproduced, the above processing is repeatedly executed until all the audio data in the predetermined area is transferred.

FIG. 2 is a block diagram showing another embodiment of the present invention. The difference from the first embodiment shown in FIG.
The difference is that a dual port RAM 26 is used in the recording / reproducing unit 20 instead of the FIFOs 22 and 23, and audio data is transferred via the dual port RAM 26 when recording and reproducing an audio signal. That is, when an analog audio signal is recorded in the RAM 30, this audio signal is used for recording / reproducing L.
The signal is converted into a digital signal by the SI 21 and compressed. Then, the audio data is sent to the dual port RAM 26 and temporarily stored therein, and the stored audio data is transferred to a predetermined area of the RAM 30 by the DMA controller 50 via the data bus BS and stored therein. When reproducing audio data in a predetermined area in the RAM 30, the audio data is read from the RAM 30 and transferred to the dual port RAM 26 under the control of the DMA controller 50. Then, the recording / reproducing LSI 21 reads out and decompresses the audio data of the dual port RAM 26 one by one, converts it into an analog signal, and outputs it.

Here, the CPU 40 confirms that a predetermined amount of audio data has been stored in the dual port RAM 26 from the RAM 21 or the LSI 21 for recording / reproducing.
26 in the address [AD
RL "(where Am> Am in the figure and its inverted output) as a sense or an interrupt, and instructs the transfer of audio data based on the detected output, as in the first embodiment. Has become. In each of the above embodiments, both the CPU 40 and the recording / reproducing LSI 20 access the FIFO and the buffer memory such as the dual port RAM at the same time. However, the FIFO has no problem in its function. Port RAM
In the case of (1), no simultaneous access to the same address occurs in processing, so that there is no problem.

As described above, one RAM 30 is provided as an audio storage memory, a plurality of recording / reproducing LSIs are provided, and a FIFO or a FIFO for temporarily storing compressed audio data between the RAM 30 and each recording / reproducing LSI is provided. Each buffer memory such as a dual port RAM is provided, and when recording and reproducing a voice message, the buffer memory and the RAM are used.
The configuration is such that the transfer of audio data between 30 is performed in units of a fixed amount of blocks. Therefore, since the compressed audio data is transferred on the data bus BS between the buffer memory and the RAM 30, it can be transferred in a time-division manner. In other words, during the recording or reproduction of an audio signal by a certain recording / reproducing LSI, it is possible to transfer the already processed audio data of another recording / reproducing LSI via the same data bus BS. Accordingly, the RAM 30 can be accessed from a plurality of recording / reproducing LSIs, so that simultaneous access to recording and reproduction, exchange of audio signals, and broadcasting can be performed.

Further, since the RAM 30 is used as a common voice storage memory, the CPU 50 can centrally manage the memory. Further, if the address bank switching function is added to the CPU 50, the capacity of the RAM 30, which is an IC memory, can be expanded, so that a large-capacity, small-sized and lightweight voice mail can be realized. In this embodiment, data transfer between the memory buffer and the RAM 30 is performed by the DMA controller 50.
If the DMA function is set to 0, the DMA controller 50 can be omitted.

[0018]

As described above, according to the present invention, a plurality of recording / reproducing circuits for encoding and compressing an audio signal and for expanding and decoding the compressed audio data, and an audio for storing the audio data. A storage memory, and a plurality of buffer memories disposed between the plurality of recording / playback circuits and the voice storage memory for storing a predetermined amount of voice data. When performing recording or reproduction of audio data, the transfer of audio data between each buffer memory and the audio storage memory connected to each accessed recording / reproduction circuit is performed in a predetermined amount and in a time-division manner. Simultaneous recording and playback of multiple voice messages, and recording and playback of multiple voice messages, allowing simultaneous access from multiple recording and playback circuits It is possible to perform at the same time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a voice mail device applied to a key telephone device according to the present invention.

FIG. 2 is a block diagram showing another embodiment of the device.

FIG. 3 is a block diagram of a key telephone device to which the above device is applied.

FIG. 4 is a block diagram of a conventional voice mail device.

[Explanation of symbols]

14, 40 CPU 30 RAM (voice storage memory) 201 to 20n Recording / reproducing unit 21 LSI for recording / reproducing (recording / reproducing circuit) 22, 23 FIFO 24, 25 Gate circuit (buffer memory) 26 Dual port RAM (buffer memory) 50 DMA Controller 60 Decoder

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04M 3/42 H04M 3/50 H04Q 3/58

Claims (1)

(57) [Claims] 1. A key telephone device having a main device for receiving an outside line and a key telephone connected to the main device, and having a voice mail function, wherein the main device encodes a voice signal. a plurality of recording and reproducing circuit for decoding by decompressing audio data compressed with compression, a RAM for storing the audio data, corresponding to the respective recording and reproducing circuits between each recording and playback circuits and RAM
To accumulate a plurality of dual port RAM which is arranged to accumulate a predetermined amount of audio data from the recording and reproducing circuit or a RAM, and a voice Deda from the recording and reproducing circuit to the RAM
That during the recording of the audio signal of the audio Deda each dual port RAM connected to the recording and playback circuits which are accessed
Performs sequentially time division transfer to the RAM, the
The audio data from the RAM is transferred to each recording / playback circuit and restored.
When playing back the audio signal to be encoded,
Before each dual port RAM connected to the raw circuit
And the rolling <br/> feeding unit performs sequentially time-division transmission of voice data from the serial RAM, and detecting means for detecting that the audio data is a predetermined amount stored in the dual port RAM, the case of the recording the The transfer means for each output of the detection means
Transfer instruction means for issuing a transfer instruction to the transfer means based on an output of the detection means in the case of the reproduction, until the voice data is exhausted.