SU1476617A1 - Method of stereophonic transmission and reception of information - Google Patents

Abstract

The invention relates to the field of radio engineering and can be used in the organization of a network of stereo information transmission in digital form. The purpose of the invention is to increase the reliability of information transfer. When transmitting from the source signals A and B of the first and second channels, they form an information signal by summing them: A + B. The control signal P is defined as the ratio of the value of the source signal of one of the channels to the information signal P = A / A + B and converts the information and control signals into a digital code. The sign bit of the control signal P is determined by the sign of the value of the ratio A / A + B. In the proposed stereo transmission method, each stereo signal sample contains an information signal (sign bit and N-1 significant bits) and a control signal P (sign bit and N-1 significant bits). A device that implements this method contains an adder, a driver, a divider, a multiplier, two comparators and a rr in the transmitting part, and a driver, four DACs, a subtractor and a constant voltage source in the receiving part. 2 Il.

Description

one ,

The invention relates to the field of radio engineering and can be used in the organization of a network of stereo information transmission in digital form.

The purpose of the invention is to increase the reliability of information transfer.

The method of stereo transmission and reception of information is as follows.

When transmitting from the original signals of the first and second channels, A and B form an information signal by summing them, A + B. The control signal P is then defined as the ratio

the value of the original signal of one of

channels to the information signal

d and transform information

A d

and control signals to a digital code, for which, for example, they are multiplied by the value of 2Pc, where n is the number of bits (number of bits) allocated for transmitting the control signal P, after which the resulting value is rounded to an integer bottom number in the range from 0 to. The sign bit controlling the signal P is determined by

BUT

the sign of the ratio value ---.

i -I B

3147

Thus, in the proposed stereo transmission method, each stereo signal sample contains an information signal (sign bit and n-1 significant bits) and a control signal P (sign bit and n-1 significant bits).

When receiving a single sound source plays the information signal

A + B with a level proportional to P (-ffrtP)

and the manager, with a level (2n - P), and since the maximum value is 1, it is with a level (1-P).

Fig. 1 shows a structural electrical circuit of the transmitting part of the device; Fig. 2 shows the receiving part of the device for carrying out the method of stereo transmission and reception of information.

The device in the transmitting part contains an adder 1, a driver 2, a divider 3, a multiplier 4, a first comparator 5, a control key 6, a second comparator 7 and a generator 8, and the first to fourth digital-analog converters 10 to the receiving part of the device 13, subtractor 14 and a voltage source 15.

The device works as follows.

In this device, in the transmitting part, the source signals A and B are summed in the algebraic sum, A

torus 1 and are shared with respect to

A 15

divider 3. The signal received at the output of divider 3 is multiplied in multiplier 4 by 2 k. After that, in the first comparator 5, the received signal is compared with a binary number in the range of 0-1 (), generated by generator 8. When the number of the generator 8 that appears closest to the number of the multiplier 4, then the control input The key 6 receives the signal and the number from the output of the generator 8 goes to the shaper 2, the other inputs of which receive the sum signal from the output of the adder 1 and information about the sign of the signal at the output of the divider 3, which is determined using the second comparator 7.

At the receiving side, the input signal is divided into information A + B and control signal P by the imaging unit 9. The information signal is fed to the digital inputs of the first and second digital-to-analog converters 10 and 11, the analog inputs of which are supplied with control signals P through the third and fourth digital-to-analog converters 12 and 13; In this case, a control signal P is supplied to the digital input of the third digital-to-analog converter 12, and a control signal () to the digital input of the fourth digital-to-analog converter 13, obtained at the output of the subtractor 14. Then

since, a then multiplying / by P, at the output of the first digital-to-analog converter 10 we get the original signal A, and multiplying L. by (1-P), at the output of the second digital-analog converter 11 we get the original signal B.

Thus, at the output get high-quality reproduction of the original signals.

Claims (1)

Invention Formula A method of stereo transmission and reception of information, which consists in generating initial signals of the first and second channels, from which they form an information signal by summing and a control signal, as well as separating the formed information and control signals during the reception and extraction of the original signals of the first and second signals. channels, so that, in order to increase the reliability of information transfer, the control signal is generated by transmitting by dividing the instantaneous values of the original signal by one From the channels to the value of the information signal, along with digital conversion, the sign signal of the control signal is formed, depending on the polarity of the ratio of the instantaneous values of the original signal of one of the channels to the value of the information signal, when receiving the original signal of one of the channels is multiplied by information signal to the control signal, and the original signal of another channel is extracted by multiplying the information signal by the difference of the maximum and instantaneous 51L766176 the values of the control signal, the dedicated channels are converted into the corresponding initial signals of the first and second analog signals.