JPH024534Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an audio reproducing device having a structure in which an audio recording section and an audio reproducing section are used in a state where they are separated from each other.

Conventional audio playback devices such as record players and tape recorders all have movable mechanical parts, so during normal use, the recording section (audio recording section) and playback section (amplifier, speaker) are integrated. It had a rustic structure. For this reason, the recording section cannot be operated independently, and its shape is large and complicated, which has the drawback of limiting its applications and places of use.

The object of the present invention is to provide a sound reproducing device that eliminates the problems associated with miniaturization by combining an integrated circuit of a sound synthesis circuit and a microwave transmission technology. The present invention will be explained below along with its embodiments.

The drawing shows the configuration of an embodiment of the present invention, in which 1 is a voice recording section, 2 is a voice synthesizer, and 3 is a voice information that is to be recorded in digital form and stored; 4 is a first antenna provided on the audio recording section side, 5 is a modulator consisting of a diode, etc., 6 is a filter circuit, 7 is a trigger pulse generation circuit, and 8 is a power supply. part, a is the speech synthesizer 2
, b is the output terminal, and c is the control terminal. Further, 11 is a reproduction section, 12 is a second antenna for transmitting and receiving the reproduction section, 13 is a directional coupling section, 1
4 is a branch, 15 is a microwave oscillator, 16 is a reception mixer, 17 is an audio amplifier, and 18 is a speaker.

Next, the operation of the embodiment with the above configuration will be explained.
The oscillation output of the microwave oscillator 15 is transmitted from the second antenna 12 via the branch 14 and the directional coupler 13. Several meters from the second antenna 12
When the first antenna 4 placed within the first antenna 4 receives the radiated power, the received output is applied to the diode of the modulator 5, and the detected component is passed through the filter 6 to drive the trigger pulse generation circuit 7. When the voice synthesizer 2 is activated by the trigger pulse generated by this drive and the resulting voice output is applied to the modulation diode, the microwave undergoes AM modulation due to its non-linear characteristics and is replayed from the first antenna 4. radiated. The re-radiated microwave is received again by the second antenna 12, passes through the directional coupler 13, is mixed with the output of the oscillator 15 by the reception mixer 16, and is subjected to homodyne detection to obtain audio information. This audio information signal is amplified by the audio amplifier 17 and output as audio from the speaker.

In the above explanation, the simplest configuration using the presence or absence of a microwave as a trigger pulse source was described, but the output of the oscillator 15 is modulated with a tone signal or the like and an identification signal is added to it, so that when the audio recording unit 1 receives the signal, ,
The low frequency component of the output of the diode 5 may be selected and extracted by the filter 6, and the trigger pulse generator 7 may be activated thereby to prevent malfunction.

Furthermore, the speech synthesizer 2 and the storage section 3 may be configured as a single-chip LSI as shown by the broken line in FIG. 1, or only the storage section 3 may be configured on a separate chip.
It may also be made exchangeable by means such as a plug-in.

In addition, in this embodiment, the frequency used is not limited to microwaves in principle, but if microwaves are used, the antenna part can be made smaller, and
Unlike the VHF or UHF band, the range of use is limited, so there is less damage prevention or interference with other devices, and it is possible to avoid the effects of dirt, dust, etc. on the equipment that occurs when using optical methods. . Furthermore, the voice synthesizer may be started by turning on the power source 8 by receiving microwave power, instead of by using a trigger pulse. Note that various methods and related LSIs have already been published as synthesis methods for the speech synthesizer, and any of them may be used.

As is clear from the above embodiments, according to the present invention, the audio recording section can be used separately from the playback section, and if the first antenna is printed and the other parts are also made into LSI, the structure can be made extremely compact. The drive can be controlled non-contact from the device side, and all components such as the power amplifier and speaker, which tend to be bulky, can be included in the playback section, making it especially convenient for outdoor use. For example, by setting an audio recording unit on a pillar on a train platform, and installing a playback/reading device inside the train, it is possible to automatically announce station names, etc. without requiring any human intervention. It has great practical value as it can be used in a variety of fields.

[Brief explanation of drawings]

The drawing is a block diagram of an audio reproduction device according to an embodiment of the present invention. 1...Speech recording section, 2...Speech synthesizer, 3...
Audio recording unit, 4...First antenna, 5...Modulation diode, 11...Audio playback unit, 12...Second
antenna, 15... oscillator, 16... demodulator,
17...Amplifier, 18...Speaker.

Claims (1)

[Scope of utility model registration request] A first antenna that receives microwaves from the audio reproducing section, a modulation diode that applies the reception input of the first antenna, and a detection output from the diode. a voice synthesizer activated by a voice synthesizer, a voice recording unit in which voice information for the voice synthesizer is recorded, and a voice signal synthesized by the voice synthesizer is sent to the diode to mix it with the reception microwave and send it to the reception microwave. a means for applying amplitude modulation to the wave by an audio signal and re-radiating it from the first antenna; a means for oscillating the microwave and radiating it from the second antenna; 1. An audio reproducing device, characterized in that the audio reproducing section is provided with means for receiving the re-radiated power with a second antenna, detecting and reproducing the re-radiated power, and obtaining an audio output.