KR20130087678A - The apparatus and method for lip sync control between audio from the speaker and video from the tvset - Google Patents

The apparatus and method for lip sync control between audio from the speaker and video from the tvset Download PDF

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Publication number
KR20130087678A
KR20130087678A KR1020120008705A KR20120008705A KR20130087678A KR 20130087678 A KR20130087678 A KR 20130087678A KR 1020120008705 A KR1020120008705 A KR 1020120008705A KR 20120008705 A KR20120008705 A KR 20120008705A KR 20130087678 A KR20130087678 A KR 20130087678A
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South Korea
Prior art keywords
audio signal
speaker
delay time
time
detected
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KR1020120008705A
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Korean (ko)
Inventor
남재권
김완규
이형우
김경준
안효원
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오픈스택 주식회사
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Priority to KR1020120008705A priority Critical patent/KR20130087678A/en
Publication of KR20130087678A publication Critical patent/KR20130087678A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals

Abstract

The present invention relates to a device for adjusting a sync between an image output from a TV set and an audio signal output from a speaker. A specific frequency detector for detecting an audio signal corresponding to a waveform; a time when the audio signal of a specific waveform of a specific frequency output from the speaker is detected through the specific frequency detector and a specific frequency output from the speaker of the TV set A delay time calculating unit for calculating a signal delay time of the TV set with respect to the speaker by comparing the detected time of an audio signal of a waveform, and being output from the delay time calculating unit to the speaker in proportion to the signal delay time of the TV set And a delay time controller for delaying the audio signal.
Accordingly, the present invention delays the audio signal output to the speaker when the sync of the video signal output from the TV set and the audio signal output from the speaker due to the delay time difference of each signal, the video signal and the speaker output from the TV set This has the effect of automatically syncing the audio signal output from.
In addition, by providing the sync control device of the present invention in each classroom, there is an effect of automatically matching the sync of the video signal output from the TV set and the audio signal output from the speaker according to the environment of each classroom.

Description

TECHNICAL APPARATUS AND METHOD FOR LIP SYNC CONTROL BETWEEN AUDIO FROM THE SPEAKER AND VIDEO FROM THE TVSET}

The present invention relates to an apparatus and a method for controlling a sync of an image output from a TV set and an audio signal output from a speaker, and in particular, a sync of an image signal output from a TV set and an audio signal output from a speaker. The present invention relates to a sync control apparatus and method for synchronizing an audio signal output from a speaker with a video signal output from a TV set by delaying an audio signal output from a speaker when the delay time does not match.

Recently, each school has a broadcasting room equipped with a camera and a microphone. In such a broadcasting room, all students transmit a video signal input from a camera and an audio signal input from a microphone to a TV installed in each classroom. You can enjoy the video and audio from the video.

In general, however, the TV in each classroom is equipped in the front, and there is a limit in controlling the audio volume greatly, so that the students sitting behind the classroom have difficulty in sounding.

Therefore, the video signal is output from the TV set, and the audio signal is output from the speakers installed in each classroom so that the students sitting in the back of the classroom can hear the sound well. There was an inconvenience that the audio signal was not well synchronized.

To overcome this problem, a method of delaying an audio signal output to a speaker using a signal delay device has been implemented.

1 is a perspective view showing a broadcast transmitting device and a signal delay device in the related art.

As shown in FIG. 1, an audio signal input from the microphone 100 is conventionally output to a speaker installed in an existing classroom, and an image signal input from the camera 100 is transmitted to the classroom through the broadcast transmission device 200. We used a binary way of exporting to the installed TV set.

However, in order to transmit the video signal input from the camera 100 to the TV set in the broadcast transmission device 200 is encoded using a compression algorithm such as MPEG-2, H.264, multiplex the encoded signal to the transport stream The time required to modulate the transport stream through 8-VSB modulation and the time required to re-demodulate the video signal received from the TV set, so that the video signal output from the TV set and the audio signal output from the speaker There was a discomfort out of sync.

In order to solve this problem, a method of delaying the audio signal output to the speaker is provided by installing a time delay relay 201 in the middle of a path through which the audio signal input from the microphone 100 is output to the speaker.

However, by measuring the time difference between the audio signal output from the speaker and the video signal output to the TV set, the conventional method of delaying the signal output to the speaker manually, the audio signal output to the speaker and the image output to the TV set There was a difficulty in accurately synchronizing the signal, and it was cumbersome to use.

In addition, for example, when the audio broadcasting and video signals are transmitted from the school broadcasting room to the speakers and TV sets installed in each classroom, the delay time of the audio signals may vary depending on the location and environment of the classroom, so that the audio There was a difficulty in delaying the signal.

The present invention has been made to solve the above-mentioned problems, and when the sync of the video signal output from the TV set and the audio signal output from the speaker does not match due to the delay time difference of each signal automatically outputs the audio signal output to the speaker The present invention relates to a sync control device and a method for adjusting the sync between the video signal output from a TV set and the audio signal output from a speaker.

In order to achieve the above object, a sync control apparatus for an image output from a TV set and an audio signal output from a speaker includes a microphone for detecting an audio signal output from a speaker and a speaker of the TV set, and detected through the microphone. A specific frequency detector for detecting an audio signal corresponding to a specific waveform of a specific frequency among audio signals, a time for detecting an audio signal of a specific waveform of a specific frequency output from the speaker through the specific frequency detector and a speaker of the TV set A delay time calculating unit for comparing the detected time of an audio signal of a specific waveform output from a specific frequency and calculating a signal delay time of the TV set with respect to the speaker, wherein the delay time calculating unit is used to determine the signal delay time of the TV set. A delay time delay that proportionally delays the audio signal output to the speaker It includes parts.

In addition, the delay time calculating unit determines that the first detected audio signal as the audio signal output through the speaker when a specific waveform of two specific frequencies are detected within the predetermined time through the microphone, the second detected audio The signal is determined to be an audio signal output through the TV.

The sync control apparatus of the image output from the TV set and the audio signal output from the speaker of the present invention is a microphone for detecting the audio signal output from the speaker and the speaker of the TV set, the specific frequency of the audio signal detected through the microphone A specific frequency detector for detecting an audio signal corresponding to a waveform; a time when the audio signal of a specific waveform of a specific frequency output from the speaker is detected through the specific frequency detector and a specific frequency output from the speaker of the TV set A delay unit calculating a signal delay time of the TV set with respect to the speaker by comparing the detected time of an audio signal of a waveform, a communication unit transferring a signal delay time of the TV set calculated through the delay time calculator; The switch in proportion to the signal delay time of the TV set received through the communication unit And a first delay time controller configured to delay the audio signal output to the beaker, wherein the first delay time controller receives an image signal and an audio signal through a camera and a microphone and outputs the signal to the TV set and the speaker. Include.

The apparatus may further include a second delay time controller configured to delay the audio signal received from the broadcast transmission device for a predetermined time and output the delayed audio signal to the speaker, wherein the second delay time controller is a signal delay of the TV set in the first delay time controller. If only part of the time t1 of the time T = t1 + t2) delays the audio signal, the audio signal output to the speaker is delayed for the remaining time t2 except for the partial time.

In addition, the TV set and the speaker receives and outputs an audio signal to which an audio signal of a specific waveform corresponding to an inaudible frequency is added to an audio signal input from a microphone from a broadcasting transmission device at predetermined time intervals, and outputs the audio signal. The apparatus includes an inaudible frequency insert for inserting the inaudible frequency.

In the sync control device of the present invention, a method of synchronizing an image of a TV set with an audio signal of a speaker is performed by a delay notification device. When an audio signal corresponding to a specific waveform of two specific frequencies is detected within a predetermined time, (A) determining the audio signal corresponding to the specific waveform of the first detected specific frequency as the audio signal output from the speaker and detecting the detected time, the corresponding waveform of two specific frequencies detected within the predetermined time (B) determining an audio signal corresponding to a specific waveform of a second detected specific frequency among audio signals as an audio signal output from the speaker of the TV set, and detecting the detected time; detecting the detected audio signal from the speaker To the speaker based on the detected time and the time when the audio signal output from the speaker of the TV set is detected. And a step (c) and (d) for delaying the audio signal in proportion to the signal delay of the TV set to be output to the speaker for calculating a signal delay time of the TV set.

In the sync control apparatus of the present invention, a method of synchronizing an image of a TV set with an audio signal of a speaker is performed when the delay notification device detects an audio signal corresponding to a specific waveform of two specific frequencies within a predetermined time. (A) determining the audio signal corresponding to the specific waveform of the audio signal output from the speaker and detecting the detected time, wherein the delay notification device corresponds to the specific waveform of two specific frequencies detected within the predetermined time. (B) determining an audio signal corresponding to a specific waveform of a second detected specific frequency among audio signals as an audio signal output from a speaker of a TV set, and detecting a detected time, wherein the delay notification device outputs from the speaker The time when the detected audio signal was detected and the time when the audio signal output from the speaker of the TV set was detected. (C) calculating and transmitting the signal delay time of the TV set with respect to the speaker with a hot water; and transmitting the audio signal to the delay notification device by delaying an audio signal by a part of the signal delay time of the TV set. In step (d), the delay notification device delays the audio signal by the remaining time except for the time delayed in step (d) of the signal delay time of the TV set and outputs it to the speaker.

The present invention delays the audio signal output to the speaker when the sync of the video signal output from the TV set and the audio signal output from the speaker is not matched due to the delay time difference of each signal output from the video signal and the speaker output from the TV set There is an effect of automatically syncing the audio signal.

In addition, by providing the sync control device of the present invention in each classroom, there is an effect of automatically matching the sync of the video signal output from the TV set and the audio signal output from the speaker according to the environment of each classroom.

1 is a perspective view showing a conventional broadcast transmitting device and a signal delay device;
2 is an internal configuration diagram of a sink adjusting device according to an embodiment of the present invention;
3 is an internal configuration diagram of a sink adjusting device according to another embodiment of the present invention;
4 is a flowchart illustrating a process of synchronizing an image signal output from a TV set with an audio signal output from a speaker through a sync control device according to an embodiment of the present invention;
5 is a view illustrating a time difference between an image signal output from a TV set and an audio signal output from a speaker according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

2 is an internal configuration diagram of a sink control apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the broadcasting apparatus 100 is provided in a broadcasting station or a broadcasting room, and includes a camera for receiving an image signal and a microphone for receiving an audio signal.

The sink control device includes a broadcast transmission device 200 and a delay notification device 400.

The broadcast transmission device 200 is installed in a broadcasting station or a broadcasting room to transmit an image signal input through a camera and an audio signal input through a microphone to a TV set and a speaker installed in each classroom, and the receiver 210 and a video encoder. 220, an audio encoder 230, a multiplexing and transport stream generator 240, a modulator 250, an A / D converter 260, a first delay time controller 270, an inaudible frequency inserter ( 280), and a D / A converter 290.

The receiver 210 is a signal receiving apparatus and receives an image signal from a camera.

The video encoder 220 receives an image signal input from the receiver 210 and encodes it using a compression algorithm such as MPEG-2 or H.264, and then outputs it to the multiplexing process and transport stream generator 240.

The audio encoder 230 receives an audio signal input from the microphone from the inaudible frequency inserting unit 280 and encodes it using a compression algorithm such as AC-3 or AAC, and then multiplexes and transmits the stream generator 240. Will output

The multiplexing and transport stream generator 240 generates a transport stream by multiplexing the video signal encoded by the video encoder 220 and the audio signal encoded by the audio encoder 230.

In this case, the multiplexing and transport stream generating unit 240 may generate a transport stream by multiplexing the additional service data and music-related data together with the video signal and the audio signal, and the additional service data may include program specific information (PSI). ) And Program and System Information Protocol (PSIP) information.

Here, the program specification information is composed of a total of four tables such as a program association table (PAT), a program map table (PMT), a network information table (NIT), and a conditional access table (CAT).

In addition, program and system information protocols include STT (System Time Table), MGT (Master Guide Table), VCT (Virtual Channal Table), RRT (Rating Region Table), EIT (Event Information Table), ETT (Extended Text Table), etc. It consists of a table.

In addition, music-related data includes information such as music title, artist, genre, and the like.

The modulator 250 modulates and outputs the transport stream generated by the multiplexing and transport stream generator 240.

At this time, the modulation method is determined according to the digital broadcasting method. In the case of the Advanced Television System Committee (ATSC) method, 8-VSB (Vestigial Side Band) modulation method is used.

The first delay time controller 270 delays the audio signal input from the microphone and transmits the delayed audio signal to the inaudible frequency insertion unit 280.

The first delay time controller 270 notifies the signal delay time of the TV set to the speaker calculated based on the time difference between the audio signal output from the speaker of the TV set and the audio signal output from the speaker from the delay notification device 400. When received, the audio signal received from the microphone is delayed by the signal delay time that is notified and transmitted to the inaudible frequency insertion unit 280.

In this case, when the digital audio signal is input from the microphone, the audio signal input from the microphone is directly transmitted to the first delay time controller 270. When the analog audio signal is input from the microphone, the A / D is shown in FIG. It is preferable to convert the digital audio signal through the converter 260 and then transfer the digital audio signal to the first delay time controller 270.

On the other hand, in the case of an audio signal output to a speaker of a TV set in general, the time taken for the audio signal and the video signal to be compressed and modulated by the multiplexing and transport stream generator 240 and the modulator 250 and received from the TV set is received. Since there is a time to demodulate the audio signal and the video signal, the audio signal and the video signal output from the TV set are output before the audio signal output from the speaker. Therefore, the delay time is usually generated in the audio signal and the video signal output from the TV set.

Therefore, the first delay time controller 270 delays the output of the audio signal output to the speaker.

The inaudible frequency inserting unit 280 receives an audio signal corresponding to a specific waveform of a specific frequency to the audio signal received from the first delay time controller 270 at a predetermined time interval (for example, 40 kHz sine wave 10 ms). For example, 10 seconds) is added to the D / A converter 290 and the audio encoder 230.

In this case, it is preferable that a specific waveform of a specific frequency becomes an inaudible frequency, and the inaudible frequency is not inserted between the audio signals, but is preferably loaded together at regular intervals.

In this case, the delay notification device 400 may calculate the signal delay time of the TV set for the speaker based on the time when the audio signal corresponding to the inaudible frequency is detected, and the first delay time controller 270 may determine the audible frequency. It calculates the signal delay time of the TV set for the speaker at regular intervals while the corresponding audio signal is output, and delays the audio signal input from the microphone to synchronize the video signal output from the TV set with the audio signal output from the speaker. Can be corrected.

In this case, the inaudible frequency insertion unit 280 may remove the audio signal corresponding to the audible frequency and transmit only the inaudible frequency to the audio encoder 230 according to the setting, and add the inaudible frequency to the audio signal input from the microphone. You can also pass it.

If the inaudible frequency insertion unit 280 transmits both the audio signal and the audio signal corresponding to the inaudible frequency to the audio encoder 230, both the video signal and the audio signal is output to the TV set, the delay notification device installed in the classroom Through the 400 and the first delay time control unit 270, the image output from the TV set, the audio, and the audio output from the speaker are all matched.

The D / A converter 290 converts the digital audio signal received from the inaudible frequency insertion unit 280 into an analog audio signal and transmits the analog audio signal to the speaker.

The delay notification device 400 may be installed in each classroom equipped with a TV set and a speaker, which are broadcast reception devices, and include a microphone 410, a specific frequency detector 420, a delay time calculator 430, and a communication unit 440. It includes.

The microphone 410 receives an audio signal output from the speaker of the TV set and an audio signal output from the speaker.

The specific frequency detector 420 converts an audio signal input from the microphone 410 into a frequency domain and determines whether an audio signal corresponding to a specific waveform of a specific frequency is input.

In this case, a modified discrete cosine transform (MDCT) method may be used as a method of converting an audio signal into a frequency domain, and a detailed description thereof will be omitted.

In addition, according to an embodiment of the present invention, it is preferable that a specific waveform of a specific frequency detected by the specific frequency sensing unit 420 is an inaudible frequency.

If it is determined that the audio signal corresponding to the inaudible frequency is detected in the specific waveform of the specific frequency through the specific frequency detector 420, the delay time calculator 430 may output the audio of the specific waveform of the specific frequency corresponding to the inaudible frequency. The signal delay time generated in the TV set is calculated by calculating a time difference between the time inputted from the speaker of the TV set and the time inputted from the speaker.

The communication unit 440 transfers the signal delay time of the TV set calculated by the delay time calculating unit 430 to the delay time inserting unit 250 through wired or wireless communication.

3 is a perspective view of a sink control apparatus according to another embodiment of the present invention.

3 is a configuration in which the second delay time controller 450 is further included in the delay notification device 400 shown in FIG. 2. The video signal and audio are transmitted to the TV set and the speaker of each classroom through the broadcast transmission device 200. Even if the signal is transmitted, different delay times may occur because the environment in which the video signal is output through the TV set and the environment in which the audio signal is output through the speaker are different in each classroom.

In this case, the second delay time controller 450 is installed between the D / A converter 290 of the broadcast transmission device 200 and the speaker installed in the classroom to delay the audio signal output from the D / A converter 290. The signal delay time of the TV set calculated at 430 is delayed to be output to the speaker.

That is, the first delay time controller 270 or the second delay time controller 450 may delay the audio signal output to the speaker by the signal delay time of the TV set calculated by the delay time calculator 430.

In another embodiment of the present invention, when the first delay time controller 270 receives the signal delay times of the plurality of TV sets from the delay notification device 400 installed in each classroom, The audio signal is first delayed by the corresponding signal delay time.

In addition, the second delay time controller 450 installed in each classroom delays the audio signal only by a signal delay time insufficient for each classroom environment so as to be output to the speaker.

For example, in the first classroom, when the signal delay time of the TV set occurred 3.1 seconds, the second classroom, the signal delay time of the TV set 3.0 seconds occurs, the first delay time controller 270 is input from the microphone The audio signal is delayed for 3 seconds and transferred to the inaudible frequency inserter 260.

In this case, the second delay time control unit 450 installed in the first classroom delays the audio signal received through the D / A converter 290 only for the remaining time of 0.1 second, and outputs it to the speaker and is installed in the second classroom. The second delay time controller 450 outputs the audio signal received from the D / A converter 290 to the speaker without delay.

In this case, the audio can be tuned to satisfy all of the slightly different delay differences in each classroom.

In addition, as shown in FIG. 3 of the present invention, the first delay time controller 270 is configured in the broadcast transmission apparatus 200, and the second delay time controller 450 is configured in the delay notification apparatus 400 of each classroom. For example, the large time may be delayed by the first delay time controller 270 and the fine time may be delayed by the second delay time controller 450.

FIG. 4 is a flowchart illustrating a process of matching a sync of an image output from a TV set with an audio output from a speaker through a sync adjusting device according to an embodiment of the present invention, and FIG. 5 is a flowchart of a TV set according to an embodiment of the present invention. This is a view for explaining the time difference between the audio output from the audio output from the speaker.

4 and 5, if an audio signal is detected through a microphone in operation S401, the delay notification device 400 detects whether an audio signal corresponding to a specific waveform of a specific frequency is detected twice within a predetermined time detected in operation S402. Judge.

When the delay notification device 400 detects an audio signal corresponding to a specific waveform of a specific frequency twice within a predetermined time, the first detected audio signal is determined as an audio signal output from a speaker in step S403, and detects the detected time. . At this time, the detected time will be t1 501 of FIG. 5.

In operation S404, the delay notification device 400 determines the second detected audio signal as the audio signal output from the speaker of the TV set, and detects the detected time. At this time, the detected time will be t2 502 of FIG.

In operation S405, the delay notification device 400 detects an audio signal corresponding to a specific waveform of a specific frequency output from a speaker of a TV set and a time when an audio signal corresponding to a specific waveform of a specific frequency output from a speaker is detected. The signal delay time of the TV set is calculated using the time difference.

In operation S406, the delay notification device 400 transmits the signal delay time of the TV set to the first delay time controller 270 or the second delay time controller 450.

Then, the first delay time controller 270 or the second delay time controller 450 delays the audio signal in proportion to the signal delay time of the TV set.

In this way, when an image is output from the TV set, an audio signal corresponding thereto may be output from the speaker.

Meanwhile, in the detailed description of the present invention, the first delay time controller 270 or the second delay time controller 450 delays the audio signal output to the speaker by the signal delay time of the TV set.

The first delay time control unit 270 delays the audio signal output to the inaudible frequency inserting unit 260 by a time corresponding to the minimum value of the signal delay time of the TV set received from the delay notification device 400 installed in each classroom. In this case, the second delay time controller 450 delays the audio signal received from the D / A converter 290 by the remaining minute delay time according to the environment of each classroom, and outputs the delayed audio signal to the speaker.

In this case, in each classroom where the same audio signal and video signal are broadcast, the audio signal output to the speaker may be delayed in accordance with the signal delay time of the TV set that varies depending on the environment of each classroom.

In addition, as shown in FIG. 5, the broadcast is terminated by transmitting an audio signal corresponding to a specific waveform, i.e., an inaudible frequency, of a specific frequency at a predetermined time interval to a TV set and a speaker by adding the audio signal input from the microphone. Periodically until the inaudible frequency specifies the signal delay time of the TV set for the speaker, thereby delaying the audio signal output to the speaker.

By doing so, it is possible to synchronize the video signal of the TV set with the audio signal of the speaker from the beginning of the broadcast to the end.

In the above description has been described by presenting a preferred embodiment of the present invention, the present invention is not necessarily limited thereto, and those skilled in the art to which the present invention pertains should be within the scope not departing from the technical spirit of the present invention. It will be readily appreciated that various substitutions, modifications and variations can be made.

100: broadcast device 200: broadcast transmission device
210: Receiver 220: Video encoder
230: audio encoder 240: multiplexing and transport stream generation unit
250: modulator 260: A / D converter
270: first delay time control unit 280: inaudible frequency insertion unit
290: D / A converter 300: broadcast receiving device
400: delay notification device 410: microphone
420: specific frequency detection unit 430: delay time calculation unit
440: communication unit 450: second delay time control unit

Claims (7)

A microphone detecting a speaker of the TV set and an audio signal output from the speaker;
A specific frequency detector configured to detect an audio signal corresponding to a specific waveform of a specific frequency among the audio signals detected through the microphone;
By comparing the time of detecting the audio signal of a specific waveform of a specific frequency output from the speaker with the specific frequency detection unit and the time of detecting the audio signal of a specific waveform of a specific frequency output from the speaker of the TV set, the speaker A delay time calculating unit for calculating a signal delay time of the TV set with respect to the apparatus;
And a delay time control unit for delaying the audio signal output to the speaker in proportion to the signal delay time of the TV set by the delay time calculator.
The method of claim 1, wherein the delay time calculating unit,
When a specific waveform of two specific frequencies is detected within the predetermined time through the microphone, the first detected audio signal is determined as the audio signal output through the speaker, and the second detected audio signal is determined through the TV. And a control device for synchronizing the video signal of the TV set and the audio signal of the speaker, which is determined as an output audio signal.
A microphone detecting a speaker of the TV set and an audio signal output from the speaker;
A specific frequency detector configured to detect an audio signal corresponding to a specific waveform of a specific frequency among the audio signals detected through the microphone;
By comparing the time of detecting the audio signal of a specific waveform of a specific frequency output from the speaker with the specific frequency detection unit and the time of detecting the audio signal of a specific waveform of a specific frequency output from the speaker of the TV set, the speaker A delay time calculating unit for calculating a signal delay time of the TV set with respect to the apparatus;
A communication unit for transmitting a signal delay time of the TV set calculated through the delay time calculating unit;
And a first delay time controller configured to delay an audio signal output to the speaker in proportion to a signal delay time of the TV set received through the communication unit.
The first delay time control unit includes a video signal and an audio signal of the TV set and the audio signal of the speaker, characterized in that included in the broadcast transmission device for receiving the video signal and audio signal through the camera and the microphone and output to the TV set and the speaker. Sink Control.
The method of claim 3,
A second delay time control unit for delaying the audio signal received from the broadcast transmission device for a predetermined time to output to the speaker,
The second delay time controller, when the first delay time controller delays an audio signal only a part of time t1 of the signal delay time (T = t1 + t2) of the TV set, and t2) delaying the audio signal output to the speaker.
According to claim 1 or 3, wherein the TV set and the speaker,
Receives and outputs an audio signal to which an audio signal of a specific waveform corresponding to an inaudible frequency is added to an audio signal input from a microphone from a broadcasting transmitter at predetermined time intervals.
The broadcast transmission device is a sink control device for the audio signal of the video signal and the speaker of the TV set, characterized in that it comprises an inaudible frequency insertion unit for inserting the inaudible frequency.
Is performed by the delay notification device,
When an audio signal corresponding to a specific waveform of two specific frequencies is detected within a predetermined time, the audio signal corresponding to the specific waveform of the first detected specific frequency is determined as an audio signal output from the speaker, and the detected time is detected ( step a);
The audio signal corresponding to the specific waveform of the second detected specific frequency among the audio signals corresponding to the specific waveform of the two specific frequencies detected within the predetermined time is determined as the audio signal output from the speaker of the TV set, and the detected time is determined. Detecting (b);
(C) calculating a signal delay time of the TV set for the speaker based on a time when the audio signal output from the speaker is detected and a time when the audio signal output from the speaker of the TV set is detected; And
And (d) delaying an audio signal output to the speaker in proportion to the signal delay time of the TV set.
When the delay notification device detects an audio signal corresponding to a specific waveform of two specific frequencies within a predetermined time, the audio signal corresponding to the specific waveform of the first detected specific frequency is regarded as an audio signal output from the speaker and the detected time is detected. Detecting (a);
The delay notification device determines that the audio signal corresponding to the specific waveform of the second detected specific frequency is the audio signal output from the speaker of the TV set among the audio signals corresponding to the specific waveform of the two specific frequencies detected within the predetermined time. (B) detecting the detected time;
The delay notification device calculates and transmits the signal delay time of the TV set for the speaker based on the time when the audio signal output from the speaker is detected and the time when the audio signal output from the speaker of the TV set is detected. (c) step; And
(D) transmitting, by the broadcast transmitting device, the audio signal to the delay notification device by delaying an audio signal by a part of the signal delay time of the TV set;
And (e) outputting the audio signal to the speaker by the delay notification device delaying the audio signal by the remaining time except the time delayed in step (d) of the signal delay time of the TV set. To sync audio signal from speakers with speaker.
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KR20170011049A (en) * 2015-07-21 2017-02-02 주식회사 이노피아테크 Apparatus and method for synchronizing video and audio
WO2018199347A1 (en) * 2017-04-25 2018-11-01 주식회사 제이디솔루션 Complex speaker system capable of simultaneously outputting ultra-directional and non-directional signals
WO2019156389A1 (en) * 2018-02-06 2019-08-15 삼성전자주식회사 Display apparatus and audio system including same
US10732927B2 (en) 2018-10-12 2020-08-04 Samsung Electronics Co., Ltd. Electronic device and control method thereof
WO2020256184A1 (en) * 2019-06-20 2020-12-24 엘지전자 주식회사 Display device
WO2022065952A3 (en) * 2020-09-28 2022-05-19 삼성전자 주식회사 Electronic device for performing synchronization of video data and audio data, and control method therefor
US11789526B2 (en) 2021-08-10 2023-10-17 Samsung Electronics Co., Ltd. Method and electronic system for outputting video data and audio data

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170011049A (en) * 2015-07-21 2017-02-02 주식회사 이노피아테크 Apparatus and method for synchronizing video and audio
WO2018199347A1 (en) * 2017-04-25 2018-11-01 주식회사 제이디솔루션 Complex speaker system capable of simultaneously outputting ultra-directional and non-directional signals
WO2019156389A1 (en) * 2018-02-06 2019-08-15 삼성전자주식회사 Display apparatus and audio system including same
US10732927B2 (en) 2018-10-12 2020-08-04 Samsung Electronics Co., Ltd. Electronic device and control method thereof
WO2020256184A1 (en) * 2019-06-20 2020-12-24 엘지전자 주식회사 Display device
US11887588B2 (en) 2019-06-20 2024-01-30 Lg Electronics Inc. Display device
WO2022065952A3 (en) * 2020-09-28 2022-05-19 삼성전자 주식회사 Electronic device for performing synchronization of video data and audio data, and control method therefor
US11789526B2 (en) 2021-08-10 2023-10-17 Samsung Electronics Co., Ltd. Method and electronic system for outputting video data and audio data

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