JPH0236656A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To attain recording without deteriorating voice by recording a voice signal received from a digital data exchange network as the digital data without any conversion. CONSTITUTION:When a call comes, the processing of call connection is applied through an ISDN interface 2, an automatic answering telephone recording start signaling is given to the caller side to start the recording of the received voice. That is, the received voice signal is a digital signal subject to PCM conversion from the ISDN network 10 and fetched by a microcomputer 3 through the ISDN interface 2. The voice data subject to PCM processing is written in a voice memory 4 and recorded in the unit of data by the microcomputer 3. The received voice signal is recorded as the digital data without any conversion so as to record the voice signal without deterioration.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication terminal device that uses a digital data exchange network.

[Prior Art] As a conventional communication terminal device, for example, an answering machine Qr
Telephones equipped with an f-channel are becoming popular. This phone is 1
It records analog voice signals received from public telephone lines.

On the other hand, when a telephone connected to a digital data exchange network records a received digital voice signal, it is handled in the same way as when it receives an analog voice signal, so the received data digitized by the digital data exchange network is recorded as a digital voice signal. H
After converting it to an analog audio signal, it is recorded onto magnetic tape or the like.

Also, the audio signals received from the digital data exchange network can be
When recording on a C, etc., the audio signal was converted from digital to analog, then digitized again using PCM or AD PCM Kasa technology, and then recorded on an IC or the like.

[The problem that the invention tries to solve! &I] However, in the above-mentioned conventional technology, since the audio signal received from the digital data exchange network is converted from -H digital to an analog signal and recorded, there is a problem in that the audio deteriorates due to this conversion.

Also, when recording audio signals on an IC, etc., t±.

- Since the audio signal that has been converted into an analog signal is digitized again, there is a problem in that the audio deteriorates significantly due to the two-time conversion.

SUMMARY OF THE INVENTION An object of the present invention is to provide communication terminal equipment that can record audio received from a digital data exchange network without deteriorating it.

[Means for Solving the Problems] The present invention provides a communication terminal device connected to a digital data exchange network that exchanges voice signals as digitized data, in which voice signals received from the digital data exchange network are exchanged as digital data. It is characterized by recording.

[Function] In the present invention, since the audio signal received from the digital data exchange network is recorded as digital data without being converted, it is possible to record the audio signal without deteriorating it.

[Embodiment] FIG. 1 is a block diagram showing a digital telephone 1 according to an embodiment of the present invention.

This digital phone 41!1 is l5DNdl12110
It is connected to the telephone and has a recording function for 1fF telephone calls when the user is away.

This digital telephone 1 includes an ISDN interface 2 that connects the 15DN #llO to the digital telephone at, a microcomputer 3 that controls the entire digital telephone 1, and a PCM coded An 11-voice memory 4 for holding and recording signals is provided.

This digital telephone Jal also includes a voice data parallel/serial converter 5 and a PCM signal encoder/serial converter 5.
C0DEC6 for decoding and timing circuits 7 and 1 for timing the microcomputer 3, etc.
A handset 8 for making calls and a key input device 9 for inputting telephone numbers and the like are provided.

FIG. 2 is a flowchart showing the operation of the digital telephone 1 when recording an answering machine.

First, the digital telephone 1 is set to operate the answering machine using the key power device 9 (Sl).

As a result, the microcomputer 3 determines whether there is an input from the key power device 9 to cancel the answering machine 4m note (S2).
Is there an incoming call through l5DN interface 2 (S
Continue to monitor 3).

When a call arrives, the call connection process is performed through the 15DN interface 2 (54), a signal to start answering machine recording is sent to the calling party (S5), and recording of the received voice is started.

That is, the received audio signal is 15DNJ1211
It is a digital signal converted from PCM from O, and I SD
Microcomputer 3 through N interface 2
(SS), this PCM audio data is received at a transmission rate of 64 Kbpg, but the unit of audio data is 1 byte, and the microcomputer 3 stores the audio data in the audio memory for each unit. 4 (S7), and the microcomputer 3 repeats this operation until the call is disconnected (S8, S9).

As described above, when the recorded audio data is played back, it is converted into serial data by the parallel/serial converter 5 into the recorded audio data, and is listened to through the CODEC 6 as a round trip.

In one or more embodiments, the digital data received from the digital data exchange network is stored in the audio memory 4, but instead of the audio memory 4, for example, a recording device using DAT (digital audio tape) as a recording medium may be used. Of course, in this case as well, the data received from the digital data exchange network is recorded as digital data.

Further, in the above embodiments, a digital telephone was described, but the present invention may also be applied to, for example, a key telephone device as a private branch exchange or a PBXkJ.

Further, for example, in the case of a blue button telephone, the present invention may be applied to the main device therein, or may be applied to a slave telephone.

(Effect of the Invention 1) According to the present invention, since the audio signal received from the digital data exchange network is recorded as digital data without being converted, there is an effect that the audio can be recorded without deteriorating the audio.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating a digital telephone according to one embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the digital telephone of the same embodiment when recording an answering machine. l...Digital telephone. 3... Microcomputer, 4... Voice memory. 10...l5DN network.

Claims (1)

[Claims] A communication terminal device connected to a digital data exchange network that exchanges voice signals as digitized data, characterized in that the voice signals received from the digital data exchange network are recorded as digital data. communication terminal equipment.