JPS61208100A - Multi-phase voice output system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a polyphase audio output method in a digital recording/playback device using a digital memory such as a semiconductor memory.

[Conventional technology]

Currently, the weather forecast notification service using the telephone network records a voice message regarding the weather forecast on a specific recording/playback device connected to the telephone network, connects it to the user's line, plays the recorded message, and sends a notification. This is a service that does

FIG. 4 is a block diagram showing a weather forecast notification service system in the current telephone network. The same figure: (1 and 2 are switchers, 3 and 5 are recording and playback devices, 4 is a recording input device, and 6
7 is a distribution amplifier, 7 is a telephone set, 8 is a subscriber line, and 9 is an exchange.

Next, the operation of the notification service will be explained. First, in FIG. 4, when contact a of switch 1.2 is inactive, recording/playback device 3 is connected to recording input device 4 and used for recording, and recording/playback device 5 is connected to distribution amplifier 6 for playback. used for purposes. During recording, the audio information of the weather forecast inputted from the recording input device 4 is recorded via the switching device 1 to the recording/reproducing device 3 for recording.

On the other hand, the user connects the telephone 7 to the subscriber line 8, to the exchange 9,
It is connected to a recording and reproducing device 5 for reproduction via a distribution amplifier 6 and a recording and reproducing switch 2, so that audio information of the weather forecast can be heard.

When the input of new information to the recording and reproducing device 3 is completed, the recording and reproducing device 3 is set for playback and the recording and reproducing device 5 is set for recording by operating the contact a of the switch 1.2.

As mentioned above, in conventional recording and playback devices of this type, one unit is used for recording and the other unit is used for playback, and when a new message is recorded for recording, it is instantly switched and the one used for recording is used again. It was necessary to use it for playback, and what was originally for playback to be used for recording.

As a result, when many users listen to the same voice message, since the times at which they access the voice message are completely random, they generally end up listening to the voice message from the middle of the voice message being played, making it difficult to understand. In order to solve this problem, it is necessary to install many recording and playback devices so that when a user accesses the system, he or she can select an available recording and playback device and start playing the voice message from the beginning. However, this method is expensive and impractical.

[Problem that the invention seeks to solve]

Therefore, the present invention aims to solve the problem of making it possible to always start playing a voice message from the beginning when a user accesses it, without installing many recording and playback devices in voice notification services etc. .

Accordingly, the present invention seeks to provide a polyphase audio output system that makes the above possible.

[Implementation row]

The present invention will now be described in detail with reference to the drawings.

@1 Figure is a block diagram showing one embodiment of the present invention. The embodiment shown in the figure is an embodiment in which audio data consisting of one message is divided into two audio segments and output in two phases.

In FIG. 1, 10 is a microphone, 11 is an amplifier, 12 is a low-pass filter, 13 is an AD converter, 14 is a voice memo 9, 15 is a polyphase converter, 16 and 17 are DA converters, 18 and 19 are low-pass filters, 20, 21 are amplifiers, 22.23 are analog output terminals, 24.25 are digital output interface units, 26 # 27
2 is a digital output terminal, 28 is a control circuit, and 29 is an expansion power circuit.

The polyphase converter (in this case, a two-phase converter) 15 is composed of output gates (output gates) Gl, G2, panzer memories Bl, B2, and output circuits PI, P2.Operation during reproduction of the above embodiment. Explain about O#! In FIG. 1, during playback, the digital signal stored in the audio memory lj 14 is divided into audio segment units K.
The m-th order is read out, the phase is shifted in two stages by the polyphase converter 15 (two-phase conversion), and the phase is shifted and input to the DA converter 16.17, which is converted into an analog signal and sent to the low-pass filter 18.19. The signals are amplified by amplifiers 20 and 21, and output to analog output terminals 22 and 23 with different phases.

In addition, when relaying to another device via a digital line, the digital output is similarly converted into two phases by the polyphase converter 15, and then transferred to the digital output interface unit 24, 25.
The signals are then output to digital output terminals 26 and 27 with different phases.

FIG. 2 shows an example of the audio signal appearing at the output terminals 22, 23 in FIG.

The audio signal is divided into two audio segments) A and B. At time t1, the audio segment (A) is played at the terminal 22, and the audio segment (B) is played at the terminal 23 at the same time, and at time t2, the audio segment (A) and B are played back at the same time. This shows that audio segment B is being played on terminal 22 and audio segment A is being played on terminal 23.

This embodiment shows a case in which a recorded message consisting of two voice segments is converted into two phases when being played back and output, but by further converting it into multiple phases, the voice message can be transmitted to random accesses from users. By providing the exchange with a function that automatically connects the voice message to the terminal that takes the shortest amount of time until it becomes playable from the beginning, it is possible to enable the user to listen to the voice message from the beginning after a relatively short waiting period. can.

next#! Returning to FIG. 1, the circuit operation of the polyphase converter 15 will be explained with reference to FIG. Note that FIG. 3 is a waveform diagram showing continuous readout waveforms of audio segments A and B.

Now, in response to an instruction from the input circuit 29, the control circuit 28 reads out continuous waveforms of audio segments A and B as shown in FIG. 3 from the audio memory 14.

At this time, the control circuit 28 sends a control signal via the control line C1 to open the output gate G1 between times T1 and T2, and open the output gate G2 between times T2 and T3. As a result, the buffer memory B1tl audio segment A is
The audio segments) B are stored in the buffer memory B2.

Next, when the control circuit 28 sends out a control signal via the control line C2, the audio segment A stored in the buffer memory B1 and the audio segment B stored in the buffer memory B2 are simultaneously sent to the output circuits P1 and P2. The control line C3 is connected to the output circuit p1. This is for controlling the output of audio segments from p2.

Next, the second voice from the voice memory 14)A
During continuous reading of and B, the control signal on control #1 IC1 opens output gate G2 between times T1 and T2,
If the output game (Gl) is opened between times T2 and T3, the audio segment will be stored in the buffer memory B2, and the audio segment will be stored in the buffer memory B2.
Each IK audio segment B can be stored.

It will be appreciated that in this way, in the polyphase converter 15, the desired two-phase conversion takes place.

〔Effect of the invention〕

As explained above, according to the present invention, a recorded message divided into n audio segments is read out, distributed to n buffers 7 in units of audio segments, and outputted to n output circuits with different phases. By making it possible to output the audio message as phased output, it is possible to listen to the voice message from the beginning after a relatively short wait depending on the user's access. It has the advantage of requiring only a single unit and being inexpensive.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a waveform diagram showing an example of the audio signals appearing at the output terminals 22 and 23 in Fig. 11, and Fig. 3 is a continuous readout of audio segments A and B. FIG. 4 is a waveform diagram showing waveforms, and a block diagram showing a conventional example of a weather forecast notification service system in a telephone network. Code explanation

Claims (1)

[Claims] 1) It has an AD converter that inputs an analog audio signal, converts it into a digital signal, and outputs it, and a digital memory that stores the digital signal from the converter, and converts the digital signal read from the memory into an audio signal. polyphase conversion for converting one message worth of digital signal read from the memory into a plurality of digital signals having the same content but having different phases, and outputting the same digital signal; a plurality of DAs each receiving digital signals having different phases from the converting means, converting the signals into audio signals, and outputting the converted audio signals;
A polyphase audio output method characterized by comprising a converter.