KR19980061867U - TV receiver with automatic execution of caption function when voice output is reduced - Google Patents

Abstract

In general, a television receiver detects a broadcast signal transmitted from a broadcasting station and outputs a video and audio signal. At this time, the broadcast signal is transmitted through an airwave transmission network rather than a wired cable. Will be affected.

In the present invention, the caption function currently employed in the broadcasting system is considered. When the level of the audio signal output through the speaker of the television receiver falls below a predetermined value, the caption function is automatically executed without the viewer's selection. The viewer can easily recognize the contents of the program currently in the broadcast state.

In the present invention, an integrating circuit 32 for integrating the level of the audio signal output through the speaker 8 and a comparator for comparing the level of the audio signal integrated by the integrating circuit 32 with a predetermined reference voltage. It is comprised with 33.

The microprocessor 35 determines the output signal from the comparator 33, and when the audio signal output from the speaker 8 is detected to be lower than a predetermined value, the microprocessor 35 controls the caption decoder 20 to drive the caption function. It will run automatically.

Therefore, the viewer can always recognize the content of the broadcast program regardless of the output state of the broadcast signal.

Description

TV receiver with automatic execution of caption function when voice output is reduced

The present invention relates to a television receiver having a caption function. Especially, when a voice output of a program currently being broadcast is lowered to a predetermined value or less due to mixing of a noise signal, the viewer automatically executes the caption function so that the viewer always has a broadcast program. The present invention relates to a television receiver having an automatic execution function of a caption function when the output of a voice is reduced, so that the contents of the apparatus can be easily recognized.

Currently, in a broadcasting system, a broadcasting station includes text data corresponding to an audio signal in a video signal and transmits the text data, and a television receiver detects text data included in the video signal and displays it on a CRT (Cathode-ray Tube). The so-called caption function is becoming common.

FIG. 1 is a block diagram showing the internal structure of a television receiver having a caption function. In FIG. 1, reference numeral 1 denotes an antenna for receiving an over-the-air broadcast signal, and 2 denotes a broadcast received by the antenna 1. A tuner (TUNER) for tuning the viewing channel among the signals, 3 is an IF amplifier for amplifying and outputting an intermediate frequency (IF) signal output from this tuner (2), 4 is amplified by this IF amplifier (3) It is a P / S separation unit that separates and outputs an image intermediate frequency (PIF) signal and an audio intermediate frequency (SIF) signal from the intermediate frequency signal.

Further, reference numeral 5 denotes a voice detector for detecting a voice signal from a voice intermediate frequency (SIF) signal separated and output from the P / S separator 4, and 6 denotes a voice output from the voice detector 5. Although not shown for the signal, a voice processor for performing voice processing such as bass, treble, volume, etc. according to a control signal from the microprocessor 16, which will be described later. It is an audio amplifier which amplifies the audio signal processed by the processor 6 and outputs it through the speaker 8 connected to the rear stage.

On the other hand, reference numeral 9 is an image detector for detecting an image signal from an image intermediate frequency (PIF) signal output from the P / S separation unit 4, and 10 is an image signal output from the image detector 9 Color, tint, brightness, and the like are processed according to control signals from the microprocessor 16 for R (Red), G (Green), and B (Blue). ) Is an image processor that outputs a signal.

Reference numeral 14 is a remote control device having a predetermined function key for caption function selection, 15 is a receiving unit for receiving an infrared signal transmitted from the remote control device 14 and converting it into an electrical code signal, and 16 is a receiving unit. It is a microprocessor as a control unit which controls the entire apparatus based on the code signal outputted from (15).

On the other hand, reference numeral 20 detects a caption ID code data signal that is transmitted and carried on, for example, a 21H horizontal scan section of a broadcast signal in accordance with a control signal output from the microprocessor 16, and processes the detected data signal to close the caption. A caption decoder for outputting R, G, B and blanking signals C 'for subtitles, and 11 denotes R, G, B and luminance signals Y and the caption decoder 20 outputted from the image processor 10. Mixer (MIXER) for mixing and outputting the R, G, B and blanking signal (C ') output from the, and 12 drives the CRT (13) connected to the rear end based on the signal output from the mixer (11) CRT drive section.

That is, when the user selects the caption mode through the remote controller 14, the television receiver equipped with the caption function having the above-described configuration, the microprocessor 16 controls the caption decoder 20 to capture the caption ID from the broadcast signal. By extracting and processing the code data signal, caption data corresponding to the current broadcast content is output on the CRT 13. Therefore, the viewer can check the dialogue content through the subtitles output on the screen.

By the way, in the above-described television receiver having a caption function, the selection of the caption function depends entirely on the manual operation of the viewer, which causes a problem that the viewer cannot use the caption function efficiently.

That is, in general, since a television receiver detects a broadcast signal transmitted through an airwave transmission network and provides a video and audio signal, the video and audio signals output through a CRT and a speaker are caused by noise signals mixed into the broadcast signal. It will be affected a lot.

In particular, the audio signal output through the speaker is very vulnerable to noise, so that even if a little noise signal is mixed in the audio signal, the viewer cannot recognize the audio signal output through the speaker.

Therefore, in the above state, the viewer may execute the caption function to watch the audio content as visual text data. In the conventional television receiver, the caption function is executed depending on the viewer's selection, and from the viewer's point of view, Since it is not easy to recognize whether the current caption broadcasting is in a running state, the caption function cannot be effectively utilized.

Accordingly, the present invention is conceived in view of the above circumstances, and when the level of the audio signal output through the speaker drops below a predetermined value while watching a television program, the viewer always broadcasts by executing the caption function. The purpose of the present invention is to provide a television receiver having an automatic execution function of a caption function when the voice output is degraded so that the contents can be easily recognized.

1 is a block diagram showing the internal configuration of a television receiver equipped with a caption function.

Figure 2 is a block diagram showing the configuration of a television receiver having a caption function automatic execution function when the audio output is reduced according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1 antenna 2 tuner (TUNER)

3: IF amplification unit 4: P / S separation unit

5: voice detector 6: voice processor

7: voice amplifier 8: speaker

9: Image detector 10: Image processor

11 Mixer 12 CRT drive unit

13: CRT 14: remote control device

15: receiver 16,35: microprocessor

20: Caption decoder 21: Caption ID detection unit

22: mode state storage unit 30: voice output detection unit

31: buffer 32: integrating circuit

33: comparator R1, R2: resistance

According to the present invention for achieving the above object, a television receiver having an automatic execution function of a caption function when a voice output is degraded has an image detector for detecting a video signal from a broadcast signal received by an antenna and a voice for detecting a voice signal. A television receiver comprising a sound processor for performing volume control on a sound signal output from the sound detector according to a detector and a predetermined control signal, the sound level detector for detecting a level of the sound signal output from the sound processor. And a caption ID detection unit for detecting a predetermined recognition signal indicating caption broadcasting from the composite video signal output from the image detection unit, and a function to execute a caption function when a voice output is deteriorated by the user as flag data as contracted. Mode state storage unit for storing and setting, broadcasting signal according to a predetermined control signal A caption decoder that processes the caption code data applied to the caption code and outputs a color tone and a blanking signal for the caption subtitle, and if the sound output level detected by the sound level detector is equal to or less than a reference level, based on a flag level of the mode state storage unit. It characterized in that it comprises a control unit for controlling the on-drive of the low caption decoder.

According to the present invention having the above-described configuration, if the audio output is lowered to the reference level or lower by ambient noise or noise while watching television while the caption function is turned off, the control means turns on the caption decoder so that the caption The function will run automatically.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention.

Figure 2 shows the configuration of a television receiver having a caption function automatic execution function when the voice output is reduced according to an embodiment of the present invention, the same reference numerals are assigned to the parts performing the same function as the configuration of FIG. Detailed description will be omitted.

In FIG. 2, reference numeral 21 denotes a caption ID detection unit for detecting a predetermined recognition signal indicating caption broadcasting from the composite video signal output from the image detector 9, and 22 denotes a caption function performed when the audio output is degraded by the user. When a function is inputted, it is a mode state storage unit which stores and sets it as contracted flag data.

In the drawing, reference numeral 30 denotes a voice level detector for detecting a level of the voice signal output from the voice amplifier 7 and outputting a low level detection signal, for example, when the level of the detected voice signal is less than or equal to a predetermined level. .

The voice output detector 30 integrates a buffer 31 for buffering and inputting a voice signal output from the voice amplifier 7 to the speaker 8, and integrates a voice signal input through the buffer 31. The integrating circuit 32 and the audio signal output through the integrating circuit 32 are coupled to the non-inverting terminal (+), and the reference voltage set by the resistors R1 and R2 is coupled to the inverting terminal (-). Comprising a comparator 33 for outputting a low level detection signal when the voice signal input through the integration circuit 32 is lower than the reference voltage.

In addition, reference numeral 35 denotes a microprocessor for controlling the entire apparatus, which sets a caption ID by setting a predetermined state flag in the mode state storage unit 22 when a low level detection signal is input from the voice level detector 30. When the caption ID is detected from the detector 21, the caption decoder 20 is driven.

In addition, when the high level detection signal is input again from the voice level detector 30, the microprocessor 35 resets the state flag stored in the mode state storage 22 to cancel the caption function. do.

Next, the operation of the device having the above configuration will be described.

First, in a state where the television receiver is turned on, the caption ID detecting unit 21 detects a recognition signal indicating caption broadcasting from the composite video signal CVS output from the image detecting unit 9. When the caption recognition signal is detected, the caption broadcast signal is output to the microprocessor 35 to indicate that caption broadcasting is being received.

On the other hand, if the function to execute the caption function is set when the voice output is degraded by the user, the microprocessor 35 sets the state flag of the mode state storage unit 22 to '1'.

In the above state, when the caption broadcast is being received but the user is watching television with the general caption reception function turned off, the high level signal is transmitted from the sound level detector 30 through the comparator 33. By being applied to the microprocessor 35, the microprocessor 35 keeps the caption function off.

On the other hand, if the noise is generated in the voice processing unit 6 or the voice amplifier 7 while watching the television while the caption function is turned off, the voice output is deteriorated.

Subsequently, the noisy voice signal is applied to the integrating circuit 32 through the buffer 31, and thus a low level signal is applied to the microprocessor 35 through the comparator 33. Therefore, when a low level signal is input from the voice level detector 30, the microprocessor 35 checks the state flag level of the mode state storage 22.

When the status flag confirms that the level is set to '1', the microprocessor 35 outputs the caption function ON drive signal to the caption decoder 20 to set the caption function to the off state. Will be turned on.

As a result, the caption decoder 20 decodes the caption code data currently being received and outputs color tone signals R, G, and B and a blanking signal corresponding thereto, which are different from the signal output from the image processor 10. The mixer 11 is mixed and output to the CRT driver 12. As a result, the caption caption of the currently received broadcast program is output on the CRT screen.

On the other hand, when the microprocessor 35 receives a high level signal from the voice level detection unit 30 later, the microprocessor 35 resets the state flag stored in the mode state storage unit 22 to caption when the voice output is degraded. The function will be turned off.

That is, according to the embodiment, if the noise is generated due to the ambient noise while watching television, and the audio output is lowered below the reference level, the low level signal is transmitted through the voice level detector 30 to the microprocessor 35. The microprocessor 35 recognizes this and automatically turns on the caption function based on the flag level of the mode state storage unit 22 so that the user can view the program content of the channel being watched through the caption caption. You can check it.

On the other hand, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention.

As described above, according to the present invention, a television receiver having a caption function automatic execution function can be realized when the audio output is automatically turned on when the audio output is degraded due to ambient noise while watching television. Will be.

Claims (2)

Audio processing for performing volume control on the video detector which detects the video signal from the broadcast signal received by the antenna, the audio detector that detects the audio signal, and the audio signal output from the voice detector according to the predetermined control signal. An additionally provided television receiver; A voice level detector for detecting a level of a voice signal output from the voice processor; Caption ID detection unit for detecting a predetermined recognition signal indicating that the caption broadcast from the composite video signal output from the image detector, Mode state storage unit for setting the caption function to be executed when the voice output is reduced by the user to save the set as the contracted flag data, A caption decoder for processing caption code data applied to a broadcast signal according to a predetermined control signal and outputting a color tone and a blanking signal for the caption subtitle; And a control unit for controlling the on-driving of the caption decoder based on the flag level of the mode state storage unit when the voice output level detected by the voice level detector is less than a reference level. Television receiver having an execution function. The method of claim 1, The voice output detector includes a buffer for buffering the detected voice signal, an integration circuit for integrating the buffered voice signal, and a comparator for comparing the integrated voice signal with a reference level. Television receiver with autorun function.