KR19980027311A - Broadcasting channel circuit capable of bidirectional communication and opposite communication with voice band channel circuit - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a broadcast channel circuit capable of bidirectional communication and opposite communication with a voice band channel circuit.

The broadcasting channel circuit of the present invention comprises an A / D converter 32 for converting analog data of an audio band into 14-bit digital data, and a compression unit connected to the A / D converter 32 for compressing digital data. (33), a coupling unit (34) connected to the compression unit (33) for rearrangement into 12-bit digital data, and a packing unit (35) connected to the coupling unit (34) to carry digital data in a trunk. A transmission circuit unit 31 including; An unpacking unit 42 for extracting digital data carried in the trunk, a reverse coupling unit 43 connected to the unpacking unit 42 to generate 14-bit digital data, and the reverse coupling unit 43 A receiving circuit section 41 including a decompressing section 44 connected to the decompressing digital data and a D / A converting section 45 connected to the decompressing section 44 to convert the digital data into analog data; A frequency converter which is connected in common to the inverse coupling unit 43 and the extension unit 44 of the reception circuit unit 41 and converts the digital data of the audio band generated by the inverse coupling unit 43 into 12-bit digital data; A voice band signal generation unit 51 connected to the frequency conversion unit 52 and having a mapping unit 53 for transcoding digital data to generate 8-bit digital data; And a local controller 61 for controlling the transmission circuit section 31, the reception circuit section 41, and the voice band signal generation section 51.

Description

Broadcasting channel circuit capable of bidirectional communication and opposite communication with voice band channel circuit

The present invention relates to broadcasting communication equipment, and more particularly, to a broadcasting channel circuit for processing an audio band signal.

In general, a broadcasting communication network includes a transmitting broadcast channel unit having a transmitting broadcast channel circuit connected to a broadcasting device, and a receiving broadcast channel having a receiving broadcast channel circuit connected to the transmitting broadcast channel unit via a transmission trunk. Unit and a public communication network connected to the receiving broadcast channel unit.

In the conventional broadcast channel circuit, transmission and reception are built in separate units, and only one-way communication is possible.

1 is a conventional broadcast channel circuit, FIG. 1A is a functional block diagram of a transmission broadcast channel circuit, and FIG. 1B is a functional block diagram of a reception broadcast channel circuit.

Referring to FIG. 1A, a transmission broadcast channel circuit receives an analog data signal in an audio band, adjusts a signal level, and converts the level-adjusted analog data into 14-bit digital data. / D conversion section); A compression unit (2) for compressing 14-bit digital data converted by the A / D conversion unit (1); A shuffling unit (3) for rearranging the digital data compressed by the compression unit (2) according to the PCM coding row to generate 12-bit digital data; It is composed of a packing unit (4) for carrying the 12-bit digital data generated by the shaping unit (3) in the time slot of the trunk frame.

In the packing section 4 of the transmission broadcast channel circuit, the digital data carried in the frame signal of the trunk is transmitted to the reception broadcast channel circuit of the opposing system.

1B, the receiving broadcast channel circuit includes an unpacking section 11 for extracting digital data from a frame signal transmitted via a trunk from a transmission broadcast channel meeting of an opposing system; An inverse shaping unit 12 for generating 14-bit digital data from the 12-bit digital data extracted by the unpacking unit 11; An expansion unit 13 for expanding the 14-bit digital data generated by the reverse coupling unit 12; A digital / analog converter 14 (hereinafter referred to as a D / A converter) for converting 14-bit digital data extended by the decompression unit 13 into analog data and adjusting and transmitting the converted analog data to a standard output level. It consists of.

Conventionally, since a transmission or reception broadcast channel circuit is implemented using a separate unit, and a circuit for matching an audio band signal and a voice band signal is not configured, bidirectional communication is impossible and a signal of a general voice band is processed. There is a problem in that it cannot communicate with the voice band channel circuit.

SUMMARY OF THE INVENTION An object of the present invention is to provide a broadcast channel circuit capable of bidirectional communication and opposite communication with a voice band channel circuit.

1 is a conventional broadcast channel circuit.

1A is a functional block diagram of a broadcast channel circuit for transmission

Fig. 1B is a functional block diagram of a receiving broadcast channel circuit.

2 is a functional block diagram of a broadcast channel circuit according to the present invention;

* Description of the symbols for the main parts of the drawings *

1, 32: analogue / digital conversion part 2, 33: compression part

3, 34: coupling part 4, 45: packing part

52: frequency converter 53: mapping part

61: local control unit

The broadcast channel circuit according to the present invention is connected to a broadcast device to adjust the level of the analog data of the audio band received from the broadcast device, A / D conversion unit for sampling the level-adjusted analog data converted to 14-bit digital data A compression unit 33 connected to the A / D conversion unit 32 to compress digital data converted by the A / D conversion unit 32, and a compression unit 33 connected to the compression unit 33 to compress the digital data. The shaping section 34 for rearranging the digital data compressed by the section 33 into 12-bit digital data in accordance with the PCM coding row, and the rearrangement of the shaping section 34 connected to the shaping section 34. A transmission circuit section 31 including a packing section 35 for carrying digital data in a time slot of a trunk frame; An unpacking unit 42 connected to a transmitting circuit unit packing unit of an opposing broadcast channel circuit through a transmission trunk and extracting digital data contained in a time slot of a trunk frame; and an unpacking unit connected to the unpacking unit 42; A 14-bit reverse shaping section 43 for generating 14-bit digital data from the 12-bit digital data extracted in 42), and a 14-bit A decompression unit 44 for decompressing digital data, and digital data, which is connected to the decompression unit 44, is converted into analog data of an audio band, and the gain of the converted audio band analog data is adjusted to adjust data of a standard output level. A receiving circuit section 41 including a D / A converter section 45 for generating a? It is connected in common to the reverse coupling unit 43 and the extension unit 44 of the receiving circuit unit 41 to convert digital data of the 14-bit audio band generated by the reverse coupling unit 43 into 12-bit digital data. A mapping unit connected to the frequency converter 52 and the frequency converter 52 to code-convert the 12-bit digital data converted by the frequency converter 52 to generate 8-bit digital data. A voice band signal generation unit 51 including 53; It consists of a local control part 61 which controls the said transmission circuit part 31, the reception circuit part 41, and the voice band signal generation part 51 according to the control signal from a network management system.

The local control section 61 designates a broadcast channel circuit according to the present invention as a transmission broadcast channel circuit or a reception broadcast channel circuit, and assigns the mapping section 53 of the voice band signal generation section 51 to the transmission trunk. It can be connected so that it can communicate with voice band channel circuit.

In the packing unit 35 and the unpacking unit 42, the process of loading and extracting digital data in a time slot of a trunk frame is performed at a broadcasting frequency of 7.5 KHz, and the sampled signal is represented by 12 binary codes and the transmission trunk is T1. As an example, when the number of real data bits of the T1 transmission line is 1.536 Mbps divided by the sampling frequency of 16 KHz (more than twice the broadcasting frequency of 7.5 KHz) and 12 bits, the number of broadcast channels that can be accommodated in one T frame is 8 When the number of broadcast channels is divided by 8 and the number of bits per frame of the T1 transmission path is 192, the number of bits that can be loaded per broadcast channel is 24. Accordingly, the packing unit 35 carries two sampled audio band data per channel in three 8-bit timeslots, and the unpacking unit 42 has two 12-bit audio band digital data in three 8-bit timeslots. Extract

When the two transmission circuit units and the reception circuit unit according to the present invention are interconnected by a transmission trunk, bidirectional communication is possible, and when the mapping unit 53 of the voice band signal generator 51 is connected to the transmission trunk, The digital data converted from the audio band to the voice band can be transmitted to the voice band channel circuit of the opposite system. Due to the nature of the broadcast channel, transmission of voice band digital data from the voice band channel circuit to the broadcast channel circuit need not be considered.

As described above, unlike the conventional case in which the transmitting broadcast channel circuit and the receiving broadcast channel circuit are configured in separate units, the broadcasting channel circuit according to the present invention constitutes a transmitting circuit section and a receiving circuit section in one unit, and further includes a receiving circuit section. By additionally configuring a voice band signal generating unit for converting an analog signal of an audio band into a digital signal of a voice band, data can be transmitted to a voice band channel circuit mounted in an opposite system as well as bidirectional communication.

Claims (2)

An A / D converter 32 for adjusting the level of analog data of an audio band received from the broadcasting device, sampling the level-adjusted analog data, and converting the converted analog data into 14-bit digital data; A compression unit 33 connected to the D conversion unit 32 to compress the digital data converted by the A / D conversion unit 32, and a digital connection connected to the compression unit 33 and compressed by the compression unit 33; A shaping unit 34 for rearranging data into 12-bit digital data in accordance with PCM Coding Law, and digital data rearranged in the shaping unit 34 by being connected to the shaping unit 34. A transmitting circuit section 31 including a packing section 35 carried in a time slot of the trunk frame; An unpacking unit 42 connected to a transmitting circuit unit packing unit of an opposing broadcast channel circuit through a transmission trunk and extracting digital data contained in a time slot of a trunk frame; and an unpacking unit connected to the unpacking unit 42; A reverse 14-bit digital data generated from the 12-bit digital data extracted in 42), and a 14-bit 14 connected to the inverse-coupled 43, The decompression unit 44 which decompresses the digital data and the digital data which is connected to the decompression unit 44 and decompresses the analog data of the audio band and adjust the gain of the converted audio band analog data to adjust the gain of the standard output level. A receiving circuit section 41 including a D / A converter section 45 for generating data; It is connected in common to the reverse coupling unit 43 and the extension unit 44 of the receiving circuit unit 41 to convert digital data of the 14-bit audio band generated by the reverse coupling unit 43 into 12-bit digital data. A mapping unit 53 connected to the frequency converter 52 and the frequency converter 52 to code-convert the 12-bit digital data converted by the frequency converter 52 to generate 8-bit digital data. A voice band signal generation unit 51 including; And a local control section (61) for controlling the transmission circuit section (31), the reception circuit section (41) and the voice band signal generating section (51) in accordance with a control signal from a network management system. The control signal according to claim 1, wherein the control signal includes a control signal for designating a broadcast channel circuit as a transmission broadcast channel circuit or a reception broadcast channel circuit, and the mapping unit 53 of the voice band signal generator 51 to a transmission trunk. Broadcasting channel circuit comprising a control signal for connecting.