KR19990004718A - Audio Multiple Signal Level Correction Method - Google Patents

Abstract

According to the present invention, when reproducing a voice signal of a native language or a foreign language in a voice multiple mode on a television, the volume of the voice signal according to a foreign language is changed by a change frequency signal generated by applying a basic frequency signal to the voice signal of the native language. Provided is a method for correcting a sound multiple signal level of a television which can be corrected.

To this end, the present invention is directed to a television having a voice multiple function for reproducing voice signals of a native language / foreign language through voice multiple processing of a voice signal according to television broadcasting by the voice multiple processing means 12 according to execution of the voice multiple mode. When a pilot signal indicating a voice multiple mode is detected from a voice signal according to television broadcasting, a predetermined basic frequency signal is supplied to the voice multiple processing means 12 to apply a change frequency signal changed by a voice signal of a foreign language. A first step of receiving and storing a second step of reproducing switching of a voice signal of a foreign language, a second step of comparing a prestored change frequency signal with the base frequency signal, and a result of comparing the stored change frequency signal with the base frequency signal Generates a volume correction signal based on the comparison difference according to It characterized by comprising a third step of correcting the volume of the audio signal of the foreign language is multiprocessing.

Description

Audio Multiple Signal Level Correction Method

The present invention relates to a method for correcting a sound multiple signal level of a television. More specifically, when a sound signal of a native language / foreign language is reproduced in accordance with a sound multiple mode on a television, The present invention relates to a sound multiple signal level correction method of a television which enables to correct a volume level.

In general, in a television system in which a predetermined channel is selected among a plurality of channels transmitted from a plurality of television broadcasting stations, and a video signal is reproduced through audio / video processing, the audio signal of the audio signal according to the television broadcasting of the selected channel is used. Correspondingly, voice processing is performed.

In general, the voice system for the audio signal of the television broadcast is provided with a voice multiplex system, which is a stereo broadcast or bilingual system by simultaneously transmitting another voice signal on a voice carrier of a television broadcast. A method of adding a second voice carrier in addition to the existing voice carrier while multicasting a subcarrier modulated with a dual carrier system and a negative voice to a conventional voice carrier. In subcarrier system, it can be classified into two-carrier, AM-FM, analog-based by FM-FM and digital by DPSK.

In the multi-carrier method, the multi-carrier method is used in Korea, Germany, and China. In the Korean method, a second voice carrier is dropped by 14.25 fH (ie, fH is 15.7342 KHz) in addition to the existing voice carrier. The pilot signal is transmitted to generate a pilot signal for determining whether the voice signal is multiplied by the audio, and the subcarrier of 3.5 fH is generated as a 50% AM-modulated control signal. It is excellent in left / right separation in the state and excellent in crosstalk and S / N ratio in two languages.

In the voice multiplex method, the AM-FM method is adopted in the Americas, such as the United States. In the stereo method, 2fH is used as a subcarrier and fH is a pilot signal, while bilingual broadcasting uses SAP (Second). The second carrier 5fH, referred to as an Audio Program, is transmitted as a second FM channel modulated by FM, and a noise attenuating circuit is employed to improve the S / N ratio for the second subchannel.

However, according to the voice multiplexing method of the television, since the voice signal level of the voice signal of the native language and the voice signal level of the voice signal of the foreign language are not equally received in the voice multiplex signal, the voice signal of the native language is reproduced. When switching to the playback state for the voice signal of a foreign language is made, a volume difference occurs due to the level difference of the voice signal, which not only reduces the listening effect, but also causes a disadvantage that it is inevitable to readjust the desired volume.

Accordingly, the present invention has been made in view of the above circumstances, and in the case of reproducing a voice signal of a native language or a foreign language in accordance with a voice multiple mode on a television, a change frequency signal generated by applying a basic frequency signal to a voice signal of a native language It is an object of the present invention to provide a method for correcting a sound multiple signal level of a television which can correct a volume of a sound signal according to a foreign language.

In order to achieve the above object, according to the audio multiple signal level correction method of a television according to the present invention, a voice multiple processing means performs a multiplexing of a native signal / foreign language through audio multiple processing of a voice signal according to a television broadcast in accordance with the execution of the audio multiple mode. In a television having a voice multiplex function for reproducing an audio signal, when a pilot signal indicating a voice multiple mode is detected from a voice signal according to a television broadcast, a predetermined basic frequency signal is supplied to the voice multiplexing means to provide a foreign language. A first step of receiving and storing a changed frequency signal changed by a voice signal of the second signal; and a second step of comparing a previously stored change frequency signal with the basic frequency signal when reproduction switching is performed for a voice signal of a foreign language; Comparison difference according to the comparison result between the stored change frequency signal and the fundamental frequency signal And a third step of generating a volume correction signal and correcting a volume of a voice signal of a foreign language which is multi-processed by the voice multiplexing means.

According to the present invention configured as described above, in the case of reproducing the audio signal of the native language / foreign language according to the audio multiplex signal of the television broadcast on the television, the multiple frequency processing of the fundamental frequency signal of 1 KHz in the state of reproducing the audio signal of the native language It supplies by means of the means to store the changed frequency signal changed by the audio signal of the foreign language, and when there is a playback switch for the audio signal of the foreign language, compares the stored changed frequency signal with the fundamental frequency signal and The volume of the foreign language audio signal can be corrected.

1 is a block diagram showing a state in which an audio multiple signal level correction method according to the present invention is applied to a television;

2 is a flowchart illustrating the operation according to the preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2: tuner, 4: video IF section,

6: voice detector, 8: voice amplifier,

10: voice FM detector, 12: voice multiple processor,

14: sound output unit, 16: function setting unit,

18: ADC, 20: data memory,

22: control unit.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a state in which the voice multiple signal level correction method according to the present invention is applied to a television. In FIG. 1, reference numeral 2 denotes a channel channel for tuning a predetermined channel from the controller 22, which will be described later. The tuner receives data and tunes the corresponding channel, converts it into an intermediate frequency signal, and shows a tuner.

Further, reference numeral 6 denotes a voice detector which performs a voice detection operation for separating a voice signal from the video intermediate frequency-amplified television broadcast signal, and 8 denotes a voice detected voice signal (i.e., voice for a multiplex signal). Signal amplification part for amplifying the signal up to a signal level capable of voice signal processing, and 10 denotes a voice FM detector for detecting the FM component of the signal amplified voice signal.

In addition, reference numeral 12 denotes a voice multiple signal including a voice signal of a native language / foreign language in the FM detected voice signal, and selectively performs a voice multiplexing on the basis of reproduction switching of a native language or a foreign language, and A voice multiple processing unit for adjusting the volume is shown, and 14 denotes a voice output unit for amplifying and outputting the multi-processed voice signal so that the speaker can reproduce voice.

Further, reference numeral 16 is composed of a matrix button unit provided in a predetermined portion of the remote control remote controller or the control panel of the main body, so that a voice signal of a native language (i.e., a main voice signal) or a voice signal of a foreign language (i.e., a negative voice signal) for a voice multiple signal is provided. Indicates a function setting section for performing key input for selective playback switching to "

Also, reference numeral 18 denotes an ADC for receiving a change frequency signal changed by a voice signal of a foreign language from the voice multiplexer 12 to a fundamental frequency signal of 1 KHz generated from the controller 22 to be described later. Analog-Digital Converter, and 20 denotes a data memory for storing the digitally changed frequency data after the recording operation is enabled by the controller 22 described later.

Reference numeral 22 detects a pilot signal indicating a voice mode for the voice multiplex signal from the voice detector 6, applies a fundamental frequency signal of 1 KHz to the voice multiplexer 12, and changes its frequency. A signal is stored in the data memory 20, and when there is a playback switch to a voice signal of a foreign language by the function setting unit 16, the change frequency signal from the data memory 20 is converted into 1 KHz. And a control unit for generating a volume correction value based on the comparison difference and applying it to the voice multiplexer 12 as a volume control signal.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 2.

First, when a television broadcast signal of a predetermined broadcast channel is tuned through the tuner 2 in step 30, the image IF unit 4 performs an image intermediate frequency amplification processing of the tuned television broadcast signal, and the sound detector 6 In order to separate a voice signal from the intermediate frequency amplified television broadcast signal, a detection operation is performed, and the controller 22 applies a pilot signal indicating a mode state of a voice multiple mode from the voice detector 6. In response to this, a state in which a voice multiple signal having a voice signal of a native language / foreign language is applied is recognized.

In this state, the process proceeds to step 31 where the voice multiple signal including the voice signal of the native language / foreign language which has undergone the signal amplification processing of the voice amplifier 8 and the FM detection operation of the voice FM detector 8 is converted into a voice multiple processing unit ( 12, the controller 22 applies a basic frequency signal of 1 KHz to the voice multiplexer 12, and in step 32 is changed by a voice signal of a foreign language in the voice multiplexer 12. When the change frequency signal is generated, it can be stored in the data memory 20 through digital conversion through the ADC 18.

On the other hand, in step 33, the controller 22 determines whether or not the function setting unit 16 performs key setting for reproducing and switching to a voice signal of a foreign language while the voice signal of a native language is reproduced according to the voice multiple mode. do.

As a result of the determination in step 33, the control unit 22 determines that the function setting unit 16 is performing key setting for playback switching to the voice multiple mode. The changed frequency signal stored at 20 is compared with the fundamental frequency signal of 1 KHz.

In this state, the flow advances to step 35 and the control unit 22 generates the volume correction value through the comparison difference according to the frequency comparison result of the change frequency signal from the data memory 20 and the change frequency signal of 1 KHz and controls the volume. As a signal is applied to the voice multiplexer 12, the voice signal of the foreign language adjusted by the voice multiplexer 12 can be reproduced with a volume level equivalent to the volume of the voice signal of the native language.

According to the present invention made as described above, if the regeneration switching to a foreign language voice signal by pre-stored the frequency signal changed by applying a basic frequency signal of 1KHz in the audio multiple mode in the television, the basic frequency signal and By comparing the changed frequency signal and allowing volume correction for the voice signal of a foreign language according to the comparison difference, the volume of the voice signal of the native language and the voice signal of the foreign language can be output evenly. .

Claims (2)

In a television having a voice multiple function for reproducing a voice signal of a native language / foreign language through voice multiple processing of a voice signal according to television broadcasting by the voice multiple processing means 12 according to execution of the voice multiple mode, When the pilot signal indicating the voice multiple mode is detected from the voice signal according to the television broadcast, a predetermined basic frequency signal is supplied to the voice multiple processing means 12 to receive and store the changed frequency signal changed by the voice signal of a foreign language. The first step, A second step of comparing a prestored change frequency signal with the basic frequency signal when reproducing switching of a voice signal of a foreign language is performed; Generating a volume correction signal based on a comparison difference according to a comparison result of the stored changed frequency signal and the fundamental frequency signal, and correcting the volume of the voice signal of the foreign language to be multi-processed by the voice multi-processing means 12; The audio multiple signal level correction method of the television, characterized in that consisting of steps. 2. The method of claim 1, wherein the basic frequency signal is set to 1 KHz in the step.