JPS6284631A - Multiplex broadcasting system - Google Patents

Abstract

PURPOSE:To allow a reception-side user to make a selection freely and to improve service by converting an output signal corresponding to original information into a specific code and broadcasting it, reproducing the specific code at a reception side from an arrival radio, wave, and then converting it into the original information in various output forms and outputting it. CONSTITUTION:A speech signal inputted from a microphone 1 is amplified 2 in a figure (a) and converted into a code by a code conversion part 3 according to a specific rule. A receiver shown in a figure (b) receives the radio wave sent from a broadcasting device by a a receiving antenna 7, a high frequency amplifier 8 amplifies the radio wave, and a demodulation part 9 reproduces the code of the original information. The obtained code is converted by an information conversion part 10 into the speech signal, which is amplified by an amplifier 11, so that original speech information is reproduced by a loudspeaker 12. A receiver shown in a figure (c), on the other hand, converts the code obtained by the demodulation part 9 into a signal indicating character information by an information conversion part 13 and the character information is printed out on paper through a printing part 14.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wireless broadcast system.

[Conventional technology]

Conventionally, 1. If you broadcast an acoustic signal such as voice, it will be reproduced as an acoustic signal on the receiving side, and if you broadcast it using a code such as facsimile communication, the receiving side will be able to receive a facsimile in the same way as the sending side.
When reproduced with a device, t-source broadcasting was put into practical use.

[Problem that the invention seeks to solve]

However, if it were possible to receive broadcast audio information as text information, for example, the service would be improved not only for the hearing-impaired but also for general users.

[Ninth way to solve the problem]

The multiplex broadcasting system of the present invention includes nine radio broadcasting devices having means for converting the original output signal into a predetermined special code and broadcasting it, and a reproduced special code t? q! It is used in combination with nine broadcast receiving apparatuses having means for converting and outputting original information in r types of output formats.

[For production]

On the broadcast receiving device side, the original information is reproduced in its original form or output in a different form, depending on the user's needs.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention.
Figure a) shows the broadcasting device side, and Figures (b) to (d) show the receiving device side.

In FIG. 2A, an audio signal input from a microphone 1 is amplified by an amplifier 2, and converted into a code by a code converter 3 according to a predetermined rule. Modulation section 4
, the high frequency current sent from the high frequency oscillator 41 is modulated by the next sign current obtained in the code conversion s3, and the resulting subharmonics are amplified by the high frequency amplification section 5 and radiated into the air through the antenna 6.

- 10, b) & C in the same figure In the next receiving device, the radio waves sent from the above-mentioned broadcasting device are captured by the receiving antenna T, amplified by the high frequency amplifier 8, and then sent to the demodulator 9 to encode the original information. is reproduced. The obtained code is converted into an audio signal by an information converter 10, amplified by an amplifier 11, and then reproduced by a loudspeaker 12 as the original audio information.

On the other hand, in the next receiving device shown in FIG. and output. Reference numeral 15 indicates an output hard copy, for example, a facsimile output paper.

In addition, in the receiving device shown in FIG. 3(d), the demodulated next code is converted into a text code in the information conversion section 16, and output as text on the display 18 under the control of the text code control section 17. .

In this way, the broadcasting device side converts the original information into a certain common code and broadcasts it, and the receiving device side has the function of converting the information sent from the broadcasting device side into the desired output format. By providing at K, different types of outputs can be obtained. This means that, for example, if the information sent is news-like content, you can not only hear it (but also see it visually) as text.
It is possible to provide a service tailored to the user's needs, such as the ability to make a hard copy of Mayu, which has the effect of ensuring information transmission. Furthermore, even if the receiving user is, for example, a hearing-impaired person with a disability, he or she can receive the same services as other healthy people.

FIG. 2 is a diagram showing the format of radio waves radiated into the air in this embodiment, where (a) shows the modulation waveform of the radio waves, and (b) shows the occupied band of the radio waves. In the present invention, the original information is encoded and sent, so it can be sent as a signal with an extremely narrow frequency band, theoretically a single frequency F, as shown in the figure. On the other hand, Figure 3 shows the case of an amplitude modulated wave, which is one of the modulated waves currently widely used.
In the modulated wave as shown in the figure (b), lf
It is understood that a wider frequency band is used compared to that shown in FIG. 2. In other words, it is understood that the present invention is useful for effectively utilizing radio waves, which are a limited resource.

Note that in the above-described embodiment, the original information on the broadcasting side is audio information, but it goes without saying that the information is not limited to this.

〔Effect of the invention〕

As explained above, according to the present invention, the output signal corresponding to the original information is converted into a special code and broadcast, and the receiving side reproduces the special code from the incoming radio wave and then converts it into the original information in various output formats. By outputting the same information, users on the receiving side have more freedom of choice, and compared to the conventional unified broadcasting system, it is more convenient for people with hearing and visual impairments, and it is also more convenient for general users. You can make choices that suit your diverse needs and improve your services.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an embodiment of the present invention, Figure 2 is a diagram showing an example of the radio wave format used therein, and Figure 3 is an example of the radio wave format used in the conventional broadcasting system. FIG. 1... Microphone, 3... Code converter, 4...
...Modulation section, 6. γ: antenna, 9: φ: decoding section, io, 13, 16: information converting section, 12...
- Loudspeaker, 14...Printing section, 15...Hard copy, 17...Text code control section, 18...
display.

Claims (1)

[Claims] A radio broadcasting device having a means for converting the output signal into a special code and transmitting it when superimposing an output signal on a carrier wave to create a modulated wave and transmitting this as a radio wave via an antenna, It is equipped with a broadcast receiving device that receives radio waves, demodulates them, reproduces the special code, converts the obtained special code into original information in various output formats, and outputs the same. A multiplex broadcast system characterized by allowing outputs in various formats to be obtained on the broadcast receiving device side.