System for transmitting and receiving sound broadcasting signals

FIELD: information technology.

SUBSTANCE: invention discloses a system for transmitting and receiving sound broadcasting signals having a transmitting part consisting of a digital signal former for the sound broadcasting program, a source of audio signals and a switch, a sound broadcasting signal transmission channel in which are connected two reception points on audio frequency, units for determining the signal type and a reception controlled switch, a digital signal former, a signal distributor and re-reception controlled switches which are configured to shunt the re-reception point.

EFFECT: possibility of transmitting analogue and digital broadcast signals.

1 dwg

 

The invention relates to a wired broadcasting and can be used for transmission and reception of sound broadcasting signals in the period of transition from analogue to digital broadcasting.

Known systems transmit and receive analog audio broadcasting signals, comprising forming the analog signal on the transmission side, performing the transfer of the audio broadcast signal in a frequency region by multiple modulation and filtering, the received signal is transmitted in a transmission line with a nominal length of 2500 km, with two pripremnih point, which is pararam, i.e. the full demodulation of high-frequency signal to obtain the original audio broadcast signal with subsequent modulation to convert a high frequency signal (pararam audio frequency) (1).

Known transmission system to receive digital audio broadcasting signals in which transmission and reception of broadcast signals are not required perepletnye paragraphs (1).

The digital audio broadcasting signals in digital form can be formed, as indicated in (2), which is characterized by a system of transmission and reception of sound broadcasting signals in digital form, containing the transmitting part, consisting of a driver of digital signals of broadcast programs, the entrance of which is broadcasting the Academy of Sciences of the tax signal, and the output is connected to the sampling rate Converter (PSD), a multiplexer, the output of which is connected to the information input of the modulator, a control input connected to the output clock (SG), and the output is the output of the direct transmission channel information, and consisting of a shaper configuration information multiplexing, the output of which is connected to the information input of the controller (MUX), the output of which is connected to the first Manager of the multiplexer input, and a receiving part that contains a tuner receiving part, the entrance of which is the entrance of the receiving part, and the information output of the tuner is connected to the information input of the decoder source that produces diskriminirovaniya whose output is connected to the information input of the digital-to-analog Converter whose output is the information output of the receiving part, wherein in the transmitting part of the entered block scrambling, an information input connected to the output of the sampling rate Converter, and the output is connected to one of the information inputs of the multiplexer and reference generator pulses, the output of which is connected to control inputs of the driver of digital signals of broadcast programs, sampling rate Converter, block scrambling, with the second opravlyaushi and the input of the multiplexer, control inputs of the driver configuration information multiplexing and controller (MUX), and the tuner transmit side, the entrance of which is input back channel transmit side, and the output is connected with the information input unit diskriminirovaniya, the output of which is connected to the information input of the decoder, the output of which is connected with the information input display device, and the output signals of the clock frequency block diskriminirovaniya connected to control inputs of the decoder and display device information, and the receiving portion of the entered unit selection clock and frame frequency, an input connected to the information output of the tuner of the receiving part, a clock output connected to a clock input of the decoder source and cyclic output connected to the input cycle pulse d / a Converter, and entered the user terminal, the information output of which is connected with the information input unit of scrambling, and control output connected with the control input of the above-mentioned block scrambling, the output of which is connected to the input of the modulator whose output is the output of the backward channel, and put a cable network (e.g., network cable television), direct input channel which is connected to the direct output of the transmitting part, and the output of clicks the private channel is connected to the input of the reverse channel transmit side, and the output of the forward channel of the cable network connected to the input of the direct channel of the receiving part, and the entrance of the backward channel is connected to the output of the backward channel of the receiving part.

Currently in operation is the most systems transmit and receive analog audio broadcasting signals.

Transmission of digital signals in such systems virtually impossible, as installed on pripremnih paragraphs equipment pararam at a low frequency distorts the signal to a form in which there is a loss of information.

The technical result consists in providing the possibility of transmission of both analog and digital signals.

This result is achieved in that a system of transmission and reception of audio broadcasting signals containing the transmitting part, consisting of the imaging unit of the digital audio program signals broadcast by the entrance of which is a source of sound signals, and the output is connected to the first input, a second input connected to the source of sound signals, the output of the switch is connected by a transmission channel of audio broadcasting signals, in which the nominal chain length of 2500 km intervals included two pripremnih point on the sound frequency, and the output of the transmission channel of audio broadcasting signals connected to the inputs of the block definition view of the signal and receiving a managed switch, a control input connected to the output of the block type determination signal, and outputs connected respectively to the input of the Converter of digital signals of broadcast programs and to the input of the distributor signals of the broadcast program, with each pararamcom point to the path by taking the connected block type determination signal, the output of which is connected to the input perepletnogo managed switch, implemented with the ability to create workarounds perepletnogo item.

The drawing shows a structural electrical diagram of the system of transmission and reception of audio broadcasting signals.

The system of transmission and reception of audio broadcasting signals includes transmitting side of the audio source 1, the imaging unit of the digital audio program signals broadcast 2, switch 3, perebranny paragraph 5 audio frequency contains the block type determination signal 4 and a managed switch 6, and at the receiving side block type determination signals 8, receiving a managed switch 7 and the Converter of digital signals of broadcast programs 9.

The system of transmission and reception of audio broadcasting signals is as follows.

With dip switch 3 on the transmission side is transferred to the analog signal (high-frequency) or formed by the driver 2 digital broadcast signal.

On pararamcom paragraph 5 of the block type determination signal 4 determines which signal (digital or analog) is transmitted. In case of detection of the digital signal block type determination signal 4 sends the command to the managed switch 6, which provides workarounds digital signal perepletnogo item 5.

At the receiving side block type determination signal 8 determines the type of signal and using the receiving managed switch 7 sends a signal to the transmitter of digital signals of broadcast programs 9 or demodulation, if the signal is analog.

The proposed system can provide robust transmission of audio broadcasting signals the transition from analogue to digital.

Sources of information

1 But, Magazynowa Comments GOST R 52742-2007" STANDARTINFORM, M., 2009 p.19-23.

2 Patent RU 37839, R & d, 10.05.2004.

The system of transmission and reception of audio broadcasting signals containing the transmitting part, consisting of the imaging unit of the digital audio program signals broadcast by the entrance of which is a source of sound signals, and the output is connected to the first input, a second input connected to the source of sound signals, the output of the switch is connected by a transmission channel of audio broadcasting signals, in which the nominal chain length of 2500 km through equal the intervals included two pripremnih point on the sound frequency, and the output of the transmission channel of audio broadcasting signals connected to the inputs of the block type determination signal and receiving a managed switch, a control input connected to the output of the block type determination signal, and outputs connected respectively to the input of the Converter of digital signals of broadcast programs and to the input of the distributor signals of the broadcast program, with each pararamcom paragraph on the sound frequency to the tract by taking the connected block type determination signal, the output of which is connected to the input perepletnogo managed switch is configured to bypass perepletnogo point.



 

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