JPS59171248A - Digital signal transmitter - Google Patents

Abstract

PURPOSE:To suppress automatically noise produced at an output terminal of a voice decoding circuit at the transmission of digital data by converting a theoretical value of the digital data into a prescribed repetitive signal. CONSTITUTION:The digital data in low speed applied to an input terminal 4 of a data converting circuit 3 at a transmission section is converted into ''1010101'' to ''0'' input and into ''0101010'' to ''1'' input. This converted data and a voice digital signal from an adaptive delta coding circuit 1 are selected by a changeover switch 5 and transmitted sequentially to a modulating circuit 6, transmission line 7 and a demodulating circuit 8.

Description

[Detailed Description of the Invention] Outside of Industrial Applications The present invention is a method for transmitting digital signals by using a wired or wireless transmission path for transmitting an audio signal, such as a mobile radio device. This is a digital Buddhist name transmission device (C) that transmits data.

Configuration of the conventional example and its problems FIG. 1 shows the general structure of the transmitter and receiver of a conventional digital mobile radio.

Figure 1 ((where 1 is the sound from microphone 2, “)
- ; I H - Akubudibuno sword circuit that converts the bow into audio digital 4g, 3 is the input terminal 41c input [
) Add redundant data to the digital data
-, , -1, data conversion circuit to be converted, 5 is a switching switch.
The audio digital signal or the digital data selected by this changeover switch 5 is manually input to the modulation circuit 6.
(The output of the rJH demodulation circuit 8 is the same as that of the demodulation circuit 8.)
Touch the voltage. 11 is the output terminal connected between the adaptive delta decoding circuit 9 and the speaker 12. 1.3 is the output terminal of the switch output terminal.

Next, the operation of the above conventional example will be explained.

The audio signal applied to the input end of the adaptive output signal generator 1 is converted into a digital signal, and is applied to the modulation circuit 6 through the changeover switch 5. The signal input to this modulation circuit 6 causes the other input of the modulation circuits to be a certain key! −,,'! qiJ4J for 4h on 7 signal
After that, wired or axis transmission line 7 transmission l:1. i
be done. '-PJ1' = recorded audio data, digital data which is lower in transmission than digital signals but more reliable is added to the data conversion circuit 30 input terminal; Then, after adding redundant bits and converting the rate, the signal is applied to the modulation circuit 3 in the same way as the audio tintal signal.

On the other hand, the signal '(bow) that has passed through the wired or wireless transmission line 7 is demodulated into a digital signal by the demodulation circuit 8p.

If the demodulated signal corresponds to an audio signal, the demodulated signal is decoded into an audio signal by the adaptive delta decoding circuit 9, and then sent to the speaker 2 (at the Connected.

On the other hand, if the digital signal demodulated by the demodulation circuit 8 is (corresponds to the digital data input), if it is 1, then 1'11
1 Nia≠digital signal Lri! u F:) Correction: 舊1Q'
Error bits occurring on the line are corrected using M bits 1 and received as digital data output.

However, in the conventional example described above, large noise is generated at the output end of the adapter circuit 9 during data transmission, so in this case, it is necessary to take the trouble to disconnect it using the switch 11. was there.

In other words, when there is no voice signal, the attarbition input router code and decoding circuit will repeat 10161: ○... and repeat No. 4. :,,,Continued: The selling point was that as the output level of the Σ and F4 circuits increased, it produced a loud noise.

[Object 1 of the Invention] The present invention eliminates the drawbacks of the above-mentioned conventional example, eliminates the need for a switch to cut off audio, and eliminates unnecessary noise signals during digital data transmission. It is. .

Structure of the Invention - In order to achieve the above-mentioned object I, the present invention repeatedly transmits digital data "1'" and "'○pa".

By converting the signal into a signal, it is possible to automatically suppress the noise generated at the output end of the audio decoding circuit during digital data transmission.

DESCRIPTION OF EMBODIMENTS (C) An example of an actual gun according to the present invention will be described below. In this embodiment, the switch 10 in the conventional example Q shown in FIG. 1 is removed, and a specific take conversion is performed in the data conversion circuit 3. This is known as Kinjicho.

Next, the operation of the above embodiment will be explained with reference to the timing chart of FIG.

The low-speed digital data applied to the input terminal 4V'tC of the data conversion circuit 3 of the transmitting section is converted to the input of digital data "o" by the data conversion circuit 3 and converted into [10
1o1o1J,, -“olololQ” for “1”
is converted to data and output. This waveform is shown in Figure 2 f.
Shown in b). The digital data converted by the data conversion path 3 or the audio signal encoded by the adaptive delta encoding circuit 1 is selected by the changeover switch 5. Next, this digital signal is sent to the modulation circuit 6. 7. Wired or wireless line transmission. The signal is transmitted through the demodulation circuit 8 and the original digital Hayabusa signal is restored.
.

Zarani, is this Tee? In the case of corresponding to the tartake signal (b), the error correction circuit 10 corrects the line error with 1: and then restores the original digital data.

Here, the timing when majority logic is used in this error correction circuit is shown in FIGS. 2(b) to 2(e) &. The error correction circuit 10 performs an exclusive OR of the internally generated waveform (C) and the input waveform (t)l (this waveform is converted into a subframe (C1+', not shown) in the same figure). If Q
0 or 1 is determined depending on which number is greater, I+ or #111.

This waveform is not shown in figure (6)K. In addition, Fig. 2(b) f(
],) The shaded portion in ) shows the waveform when a line error occurs.

−J Hadizotarbuta input or transmission has been cut off,
'f; Tazote, Interta decoding circuit 9 (, f? 2nd
Figure (b+ waveform is applied. In this case, due to the following two reasons, the reciprocal waveform is suppressed to a small value (this glue 1 is noise). V konaru.

(aj Atanora Inotel/2♀1 recurve circuit 1, 9
The ataptizo theory till is encoded in most cases /, -''1゛, ``○゛Buddha bow゛'' series (] (examples - is 3)
-
, Knee decided on that quantized slur 7-koiro. the/
Knock it down! Figure 2 (b) 1] J, i'j-1 in the 41st tray with almost no name.
The knob is very small.
/This message-shiji 1)'-\rL becomes a small cold thing.

fb) Completed fterta sign-5Ui circuit rυ[1
Warudintal f, “j-bow ga′”1 ”, ”O
``The police box I1-1 with the bow/mi) and the reciprocating;
) outside 1. Even if the waveform of (b) is applied to the anotative teltar decoding circuit, Most of the components become out-of-band signals and can be removed.

In this embodiment, 1. During digital data transmission, it is possible to automatically suppress the output of the 171-path output-arch (verification), which is different from the conventional example.
1. Use the eel switch 11 to manually tie the 7 tones, and identify the audio signal and the digital surikyu in the oxda receiver (in this case, it will take 1 hour for each iIl). Therefore, noise will be generated during that time, and the width will become unnecessary.

Effects of the Invention The present invention is composed of 71 grams as described above, and is a digital device.
1010 for Ta's l111+ ・1 Yuki no Kokei Shinkyu''
○ “Ni-woman” and its opposite polarity are paired [j\: Let-C, so the digital data transmission bacterium V will suppress the 41st / clear 11th tone in the atanotinoulta encoder. . At that point, put a switch to cut off the straddle, and automatically (/(sound jj,, i transmission or digital data transmission status / identification J-7\) I'!”ia Raku C) 2.1 Power t
11-, Teti / Tarbes “-ta (7th delivery) Samurai’s 9
(It is not necessary to cut 1-2 or do 1 go f.)
: Make a profit of 1.

[Brief explanation of the drawing]

11:'<1 is a block diagram of the original digital signal transmission device, and FIG. 1... Atabj if delta code circuit, 2...-7
1.1 phon, 3.Rata conversion circuit, 4-...
Di7゛tarbutano\power terminal, 5... bB exchange switch, 6- food adjustment circuit, 7... transmission line, 8 ・
Demodulation circuit, 9 ・Decoding circuit for converter 7 to converter, 1
0...Error correction iF circuit, 11 Switch, 1
2... Subi Tsuba 13--9 ,';;Taru-i
- Data output terminal. Name of agent: Iya-L Naka Jf, Toshio, and 1 other person Procedural amendment (old style) July 28, 1958 Director-General of the Japan Patent Office 1 Indication of 1 case 1988 Patent Demon 1 No. 44926. ．． j'32 Name of invention Digital signal transmission device 3 Matters for correction
) Request Address Osaka + (J Kadoma City Oazamon ↓'!, 1. OO6 address name ('+; (5
82) Representative of Matsushita Electric Industrial Co., Ltd. [formerly To゛ 1 Hiko 4 Representative 〒571 Address Oaza Kashima, Q City, Fumon, Osaka], 006 @ 4' within Matsushita Electric Industrial Co., Ltd. [Chart: S97] Story (Tokyo M37-1121/IL Koho, 1
-1.1 S.C.5 Amendment Order Daily 7, Details of Amendment 1, page '9, line 2 □ "Figure 2 (a) to (e)
) is” is corrected to “Figure 2 is” -.

Claims (1)

[Claims] γblind-b1 convex bow voice te 2f sita 7L signal is 7-variable 1 increment means for adafchiibu-ano L digitization, input categorical data's pa 1°l, It oI+, so Jl zowa "1''O
“i starting with °: jj PI Hit's manipulation return Shinkyu,
Or enter Katishitano 1 Cheetah・2L>1-1'-1
"'o" (42 vs. Shiso J'L-7Cwa ○") Multiple hit repetition starting from ''I'1-i-bow,"starting from 1''': Ruto, 1 number hit, To Repeat 2 bales - bow i/(
2) converting data transducer) means' and converting jl/ko sound μ
) Dibutalui 8-: No. y, (1-cho J: -, 7 in.
A modulation means that modulates the Nordeta, a wired or wireless transmission line that transmits the output of this modulation T stage, and a modulated signal transmitted via this transmission line 4 is being demodulated (2). revenge ^11
t, + means, and then L15. The output of means j is sound piece 1f
t+I bow ('(Second generation) - A digital iris comprising an attabu-i-fterta extracting means for bowing, and a data restoring means for restoring the output of the demodulation means to data. code transmission device.