KR0119488Y1 - Sound multiple receiving apparatus - Google Patents

Abstract

The present invention improves the detection of the pilot signal for distinguishing the broadcast mode of the voice multi-broadcast in the two-carrier type voice multi-receiving in the voice signal processing apparatus, and the user can change the broadcast mode of the voice multi-broadcast. The present invention relates to a multiplex receiver capable of directly selecting and receiving a first signal. The first signal for detecting and outputting a left and right signal for stereo broadcasting and a first language signal for bilingual broadcasting from a voice intermediate frequency of a selected channel. A processing unit, a second signal processing unit for detecting and outputting a cross signal and a bilingual signal from an audio intermediate frequency, and a pilot signal processing unit for detecting and outputting a pilot signal modulated to a second voice carrier of the second signal processing unit. A pseudo pilot signal generator for generating a first pilot pilot signal and a second pilot pilot signal for a predetermined time according to the output of the pilot signal processor; The left and right voice signals are determined by a mode judgment unit for outputting a signal for determining which broadcast mode the current broadcast mode is compared with a preset reference frequency output from the four pilot signal generator, and a signal output from the mode decision unit. And a sound output unit for outputting the first and second national language signals and the same voice signal through the left and right channels, respectively, to provide a stable pilot signal for the smooth reception of stereo or bilingual broadcasting.

Description

Voice Multiple Receiver

1 is a block diagram of a conventional multiplex voice receiver.

2 is a block diagram according to an embodiment of a voice multiplexing device according to the present invention.

* Explanation of symbols for main parts of the drawings

101, 201: first signal processor 105, 202: second signal processor

109,203: pilot signal processing section 114,213: frequency comparison section

116,215: mode control unit 117,216: matrix

205: pseudo pilot signal generator

The present invention relates to a voice multiple receiver in a voice signal processing apparatus, and in particular, improves detection of a pilot signal, which is a recognition signal for distinguishing a broadcast mode of a voice multiple broadcast, when a voice multiple reception is performed, and also allows a user to broadcast a voice multiple broadcast. The present invention relates to a voice multiple receiver capable of directly selecting a mode.

In general, apparatuses for receiving multiple voices include televisions and video cassette recorders (VCRs). These video apparatuses are provided with a tuning circuit to tune and receive a desired signal from a signal transmitted from a broadcasting station. In particular, voice multicasting, which requires two voice channels, realizes not only stereo broadcasting but also bilingual broadcasting. Broadcasting method of voice signal is slightly different in each country. In other words, the Americas adopts the Zenith method, an AM-FM method that modulates a sub-channel to subcarriers, and adopts a two-carrier method using separate carriers for additional voice channels in Korea and Europe. Doing. Since the two-carrier method was first put into practice in West Germany, which adopts the PAL method, the two-carrier method in Korea, which adopts the NTSC method as the basic broadcasting method of TV, is different from the West Germany.

In order to minimize the mutual interference between video and audio signals, the two-carrier method, which is a TV voice multiple broadcasting method adopted by Korea, is set to 4.5 MHz for the first voice carrier. In the case of the second audio carrier, 2.7242 MHz is set. The pilot signal corresponding to the recognition signal for distinguishing modes of broadcasting is AM-modulated with a subcarrier of 55.07 KHz on the second audio carrier, and it is 149.9 Hz for stereo broadcasting using this pilot signal. In case of (Bilanguage) broadcasting, it modulates 276.0Hz. Both frequencies use 1/105 and 1/57 divisions of the horizontal synchronization signal (F _H = 15.73KHz). If no signal is modulated by subcarriers, it indicates mono broadcasting. This is to minimize the influence with the image and to facilitate separation from each other in the receiving circuit.

FIG. 1 is a block diagram of a conventional voice multiplexing device. The first signal processor 101 processes a first voice carrier signal by inputting a voice intermediate frequency of a tuned channel and a second sound carrier signal. A pilot signal connecting an input terminal to an output terminal of the second signal processing unit 105, an output terminal of the second signal processing unit 105, and an output terminal of the pilot signal processing unit 109. An input terminal is connected to the amplifying unit 113, an output terminal of the pilot signal amplifying unit 113 and an output terminal of the oscillating unit 115, and a frequency comparing unit 114 connected to an input terminal. An input terminal is connected to the mode control unit 116, an output terminal of the first signal processing unit 101, and an output terminal of the second signal processing unit 105, respectively, and one input terminal is connected to an output terminal of the mode control unit 116. A matrix 117 having output terminals connected to the channel output terminals, respectively. It is.

In the conventional voice multi-broadcast receiver having such a configuration, the pilot signal is modulated to such an extent that it does not affect the actual listening signal of the first voice carrier (1.5 MHz) and the second voice carrier (4.7242 MHz). The pilot signal may cause an error in the signal of the signal and the signal of the loud noise. That is, even though the first audio signal and the second audio signal are sufficiently demodulated, there is a problem in that the broadcast mode is not recognized properly due to an error of the pilot signal, and thus, smooth broadcast reception is not possible.

Therefore, the purpose of the present invention is to generate a stable pseudo pilot signal when receiving voice multiple broadcasts to more stabilize the functions of stereo and bilingual broadcasts, and even if the pilot signal is not detected. The present invention provides a voice multiple receiver capable of receiving voice multiple broadcasts by selecting a broadcast mode determined by the above.

In order to achieve the above object, in the apparatus for receiving a broadcast signal of a two-carrier (Two-Carrier) method of the voice multiple broadcasting method according to the present invention,

Detecting and outputting the first audio carrier band from the voice intermediate frequency of the tuned channel and detecting the L / R signal for stereo broadcasting and the first national signal for bilingual broadcasting. The first signal processor for detecting the second audio carrier band from the voice intermediate frequency of the tuned channel and the left and right signals (LR) in the case of stereo broadcasting, and the second language in the case of bilingual broadcasting A second signal processing unit for detecting and outputting a signal, a pilot signal processing unit for detecting and outputting a pilot signal modified to a second voice carrier of the second signal processing unit, and a stereo according to the output of the pilot signal processing unit (Stereo) a pseudo pilot signal generator for generating a first doctor pilot signal for broadcasting, a second doctor pilot signal for bilingual broadcasting for a predetermined time, and the pseudo pilot signal generator In comparison with the signals and a preset reference frequency having a frequency between the first pilot pilot signal and the second doctor pilot signal, the current broadcast mode is stereo broadcast and bilingual broadcast. In the case of stereo broadcasting, a mode determining unit for outputting a signal for determining whether or not a mono broadcasting and a signal output from the mode determining unit processes the outputs of the first and second signal processing units. It includes a voice output unit for outputting the left and right audio signals to the left and right channels, respectively, when the first and second language signals in the bilingual broadcast and the same audio signal in the mono broadcast. It features.

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of an embodiment of the present invention. The configuration of FIG. 2 is a first signal processor 201 which inputs an audio intermediate frequency of a tuned channel, and an audio intermediate frequency of a tuned channel. A pilot signal processor 203 which connects an input terminal to an output terminal of the second signal processor 202, a second signal processor 202, and a pilot signal amplifier which connects an input terminal to an output terminal of the pilot signal processor 203. 204, the pseudo pilot signal generator 205 connecting the input terminal to the output terminal of the pilot signal amplifier 204, the output terminal of the pseudo pilot signal generator 205 and the second oscillator 214. A frequency comparator 213 connecting inputs to an output terminal, a mode control unit 215 connecting an input to an output terminal of the frequency comparator 213, an output terminal of the first signal processor 201, and a second signal processor 202. Connect the output terminal of) to the input terminal and connect the output terminal to the L channel output terminal and the R channel output terminal, respectively. Belongs comprises a matrix (216).

Next, the operation of FIG. 2 will be described with reference to FIG. 1.

The first and second signal processing units 201 and 202 and the pilot signal processing unit 203 are configured similarly to the first and second signal processing units 101 and 105 and the pilot signal processing unit 109 shown in FIG.

That is, the signal transmitted from the broadcasting station is tuned to the frequency of the tuned channel so that a corresponding voice intermediate frequency is input to the first signal processing unit 201 and the second signal processing unit 202. The signal flowing into the first signal processing unit 201 is applied to the first band pass filter 102 to detect the first voice carrier of 4.5 MHz, amplified by the first amplifier 103 and the first detector 104. Signals detected on the first audio carrier are detected and output. The signal introduced into the second signal processing unit 202 is applied to the second band pass filter 106 to detect the 4.7 MHz second voice carrier, is amplified by the second amplifier 107, and the second detector 108. Signals detected on the second voice carrier are detected and output.

The signal output from the second signal processing unit 202 is input to the pilot signal processing unit 203 to detect a pilot signal AM-modulated with a 55 KHz subcarrier on the second voice carrier and is then passed through the third band pass filter 110. The subcarrier of 55 KHz is detected, amplified by the pilot carrier amplifier 111, and the signal loaded at 55 KHz by the third detector 112 is detected and output.

The signal output from the pilot signal processor 203 is applied to the pilot signal amplifier 204 and amplified and then applied to the pseudo pilot signal generator 205.

Even if the signal output from the pilot signal amplifier 204 is weak and unstable, the pseudo pilot signal generator 205 generates a stable pilot signal and outputs it to the frequency comparator 213 so that it can be used in stereo broadcasting and bilingual. You can listen to the broadcast stably.

This will be described in more detail as follows. The signal applied to the pseudo pilot signal generator 205 is input to the mode discriminating unit 206, and the mode discriminating unit 206 has the same function as the frequency comparing unit 213 in the pilot signal amplifying unit 204. If the output signal has a frequency component lower than 210Hz, it indicates the stereo broadcasting mode and if there is a high frequency component, it indicates the bilingual broadcasting mode. When the mode discriminating unit 206 detects a predetermined signal from the pilot signal amplifying unit 204, a control signal indicating that the pilot signal is input is output to the power generation control unit 210 and the delay unit 211, and simultaneously Outputs the selection control signal of the control switch SW1.

The switching operation is controlled in the first control switch SW1 by the result determined by the mode discriminating unit 206. That is, when a control signal indicating the stereo mode is input, the frequency comparison unit 213 is switched to the first contact point S1 to divide the frequency generated by the first oscillator 207 by 1/105 from the 1/105 divider 208. ) The frequency generated by the first oscillator 207 is a horizontal synchronous frequency of 15.73 KHz. However, when a signal indicating a bilingual mode is input, the frequency is switched by switching to the second contact point S2 to divide the frequency generated by the first oscillator 207 by 1/57 from the 1/57 divider 209. 213).

The second control switch SW2 and the third control switch SW3 are controlled by a mode control signal given to an external input. The user may determine a broadcast mode of a program to be viewed using a newspaper, and control the second control switch SW2 and the third control switch SW3 to listen to the broadcast in a desired mode.

The delay unit 211 starts the count COUNT by a control signal indicating that the pilot signal output from the mode discriminator 206 is input, and ends the end signal for notifying the end of the count after a predetermined time elapses. Output to 210). This end signal is a signal for stopping the operation of the first oscillator 207.

The delay canceling unit 212 delays the delay control signal input by the user when the stereo or bilingual broadcasting mode is maintained for a predetermined time even after the stereo or bilingual broadcasting is terminated. The release signal is output to the delay unit 211.

The oscillation controller 210 generates a signal for driving the first oscillator 207 according to a control signal indicating that a pilot signal output from the mode discriminator 206 is input, and outputs a predetermined signal output from the delay unit 211. A signal for stopping the operation of the first oscillator 207 is output by the end signal indicating the end of time. The oscillation controller 210 may control the first oscillator 207 by inputting an external oscillation control signal determined by the user again after a predetermined time set by the delay unit 211.

Meanwhile, the 1/105 divided signal or the 1/57 divided signal of the horizontal synchronous signal which is a signal output from the pseudo pilot signal generator 205 is input to the frequency comparator 213. The frequency comparator 213 outputs to the mode controller 215 a signal indicating a stereo broadcasting mode when the frequency is lower than 210 Hz and a bilingual broadcasting mode when the frequency is higher than 210 Hz, compared to 210 Hz output from the second oscillator 214. In addition, a signal for driving a display element such as a light emitting diode (LED) mounted on a key panel of the set is output together so that the user can directly distinguish between the stereo broadcasting mode and the two voice broadcasting mode.

The matrix 216 processes a signal output from the first signal processor 201 and a signal output from the second signal processor 202 according to a signal output from the mode controller 215 or a mode determination signal set by a user. Outputs left and right channel signals. In the stereo broadcasting mode, the signal output from the first signal processor 201 is a left and right sum signal (L + R), and the signal output from the second signal processor 202 is a left and right difference signal (LR). The process separates the L signal component and the R signal component and outputs them to the L output terminal and the R output terminal, respectively.

In the bilingual mode, the signal output from the first signal processor 201 is a first language signal, and the signal output from the second signal processor 202 is a second language signal. Output to L output terminal and R output terminal, respectively.

As described above, the apparatus for receiving a voice multiplexed according to the present invention generates a stable pseudo pilot signal and enables the user to select a broadcasting mode judged by the user without generating a pilot signal, thereby making the voice multicast signal transmitted from a broadcasting station more stable. There is an advantage that you can listen.

Claims (6)

In an apparatus for receiving a two-carrier broadcasting signal of a voice multiple broadcasting method, a first audio carrier band is detected from a voice intermediate frequency of a tuned channel, and in case of stereo broadcasting, the left and right signals are mixed. A first signal processor for detecting (L + R) and outputting a first language signal in the case of a bilingual broadcast; The second audio carrier band is detected from the voice intermediate frequency of the tuned channel to detect and output the left and right signals LR in the case of stereo broadcasting, and the second language signal in the case of bilingual broadcasting. 2 signal processing unit; A pilot signal processor for detecting and outputting a pilot signal modulated to a second voice carrier of the second signal processor; According to the output of the pilot signal processor, a pseudo pilot signal generator for generating a first pilot signal for stereo broadcasting and a second pilot pilot signal for bilingual broadcasting for a predetermined time. ; Compared with the signals and the preset reference frequency having a frequency between the first pilot pilot signal and the second pilot pilot signal output from the pseudo pilot signal generator, the current broadcast mode is stereo (Stereo) broadcast, A mode determination unit for outputting a signal for determining whether a bilingual broadcast or a mono broadcast; The output signal of the first and second signal processing units is processed by the signal output from the mode determining unit, and the left and right audio signals are output in the case of stereo broadcasting and the first and the second signals in the case of bilingual broadcasting. In the case of mono broadcasting, the mono or bilingual broadcasting is smoothly carried out by a stable pilot signal including a voice output unit which outputs the same voice signal to the left and right channels, respectively. An apparatus for receiving multiple voices, which can be listened to. The method of claim 1, wherein the pseudo pilot signal generator determines a pilot signal output from the pilot signal processor to output a signal indicating that a pilot signal is input, and outputs a signal distinguishing stereo and bilingual broadcasting. Mode discrimination unit for; A first oscillator for oscillating a horizontal synchronous signal frequency of an image signal; A first divider dividing a first constant to output a frequency corresponding to a pilot signal for stereo broadcasting by outputting the first oscillator; A second divider for dividing a second constant to output a frequency corresponding to a pilot signal for bilingual broadcasting to the output of the first oscillator; A first control switch for selectively outputting the output of the first oscillator to the first divider or the second divider according to the output of the mode discriminating unit; A delay unit which is operated by a signal indicating that the pilot signal output from the mode discriminating unit is received and outputs a signal for stopping the operation of the first oscillator after a predetermined time delay; A driving signal for driving the operation of the first oscillator is output by inputting a signal indicating that the pilot signal output from the mode discriminator is input, and the operation of the first oscillator is performed by a signal output from the delay unit. And an oscillation control unit for outputting a stop signal for stopping. The oscillation control unit according to claim 2, wherein the oscillation control unit controls the driving of the oscillation unit by an external oscillation control signal set after the predetermined time elapsed by the delay unit has been determined by the user through a mass media or the like. Voice multiple receiver device characterized in that. The method of claim 2, wherein the pseudo pilot signal generator is further configured to prevent the oscillation control signal for stereo or bilingual broadcasting from being maintained after a predetermined time set by the delay unit even after the stereo or bilingual broadcasting is terminated. And a delay release unit for outputting a delay release signal to the delay unit according to a delay control signal set by a user. The method of claim 2, wherein the pseudo pilot signal generating unit outputs the first divider for stereo broadcasting by an external mode control signal set by the user by judging the mode of the broadcast by the user in advance. And a selection unit for selectively outputting an output of a second divider for bilingual broadcasting to the mode determining unit. 2. The apparatus of claim 1, wherein the mode determining unit comprises: a second oscillating unit for oscillating a predetermined frequency for distinguishing stereo and bilingual broadcasting; The signals output from the pseudo pilot signal generator and the output signals of the second oscillator are compared, and the stereo broadcast mode is lower than a predetermined frequency of the second oscillator, and bilingual broadcasting is higher than a predetermined frequency of the second oscillator. A frequency comparator for outputting a signal indicating a mode; A mode for distinguishing between stereo and bilingual broadcasting outputted from the frequency comparator, and a mode determination signal set by the user by judging the mode of the broadcast in advance by the user through a mass media or the like and outputting to the voice output unit Voice multiple receiving apparatus comprising a control unit.