CN213693982U - Audio-video system - Google Patents
Audio-video system Download PDFInfo
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- CN213693982U CN213693982U CN202022685717.8U CN202022685717U CN213693982U CN 213693982 U CN213693982 U CN 213693982U CN 202022685717 U CN202022685717 U CN 202022685717U CN 213693982 U CN213693982 U CN 213693982U
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Abstract
The utility model relates to an audio-visual system, include: novel OTT box, novel OTT box include host computer, USB detection device and MIC, and the host computer includes CPU, audio player and HDMI module, and USB detection device includes USB interface, sound card treater and wireless emission module, the host computer is connected with the MIC, and host computer and USB detection device pass through USB interface connection. The utility model discloses can detect the time delay that causes because of TV audio signal handles to the compensation time delay realizes the synchronous sound production of audio-visual scene.
Description
Technical Field
The utility model relates to an audio-visual technical field, in particular to audio-visual system.
Background
The application scenarios of the novel OTT box for televisions provided by the prior art are as follows: the box outputs the audio to the television for playing through the HDMI interface, after the HDMI audio enters the television, the HDMI audio is played to the power amplifier through digital signal processing and D/A conversion of the television host, the audio is played from the television loudspeaker, and the audio is received and played from the television, and due to different processing schemes of different televisions, the delay of the audio signal from entering the television to playing reaches 40-100 ms.
If the novel OTT box is to be externally connected with the application scene of the sound equipment: in order to enhance the sound effect, a user can simultaneously play the sound by externally connecting the sound box, and an audio 3.5mm earphone output port is arranged on a common box and is accessed to the sound box by a wire for playing. Above TV and external stereo set broadcast scene simultaneously, TV is because of adopting different technical solution, and audio signal plays great time delay from the box output to TV loudspeaker, and the time delay is also uncertain, and from the audio frequency that the box got into the stereo set to the broadcast, and the time delay is very little, and this has just caused 2 playback devices of TV and stereo set, and sound is asynchronous, and user experience is very poor, and wired connection stereo set also can connect complicacy.
SUMMERY OF THE UTILITY MODEL
The utility model provides an audio-visual system can solve a plurality of audio playback equipment asynchronous problems.
In order to realize the purpose, the utility model provides the following technical scheme:
an audio visual system comprising: the novel OTT box comprises a host 1, a USB detection device 2 and an MIC3, wherein the host 1 comprises a CPU, an audio player and an HDMI module, the USB detection device 2 comprises a USB interface, an acoustic card processor and a wireless transmission module, the host 1 and the USB detection device 2 are connected through the USB interface, the host 1 is connected with an MIC3, and the HDMI interface is used for connecting the novel OTT box to a television;
the audio player is used for playing audio and transmitting the audio to the USB interface;
the USB interface is used for receiving the audio, transmitting the audio according to a standard USB protocol, generating a first sound signal and transmitting the first sound signal to the sound card processor;
the sound card processor is used for receiving the first sound signal, carrying out audio distribution transmission on the first sound signal by using an audio input and output channel of the sound card, and generating a second sound signal and a sixth sound signal,
and transmitting the second sound signal to a USB interface, and transmitting the sixth sound signal to the wireless transmitting module,
and is connected with the CPU of the host computer through the USB interface for transmission control; the sound card processor is connected with the wireless transmitting module and controls the transmission of the wireless transmitting module;
the wireless transmitting module is used for receiving a sixth sound signal, modulating and wirelessly transmitting the sixth sound signal, supporting one-to-many wireless transmission by adopting an own communication protocol, and generating a seventh sound signal which is transmitted to the wireless receiving module in the wireless sound equipment and played;
the USB interface is used for receiving the second sound signal, transmitting the second sound signal according to a standard USB protocol, generating a third sound signal and transmitting the third sound signal to the HDMI module; the USB interface is also used for transmitting control between the host and the USB detection device.
The HDMI module is used for receiving a third sound signal, transmitting the third sound signal by using a standard HDMI protocol, generating a fourth sound signal and transmitting the fourth sound signal to an HDMI interface;
the HDMI interface is used for receiving the fourth sound signal, transmitting the fourth sound signal by using a standard HDMI protocol to generate a fifth sound signal, transmitting the fifth sound signal to the HDMI interface of the television, and processing audio to a television loudspeaker for playing after the audio enters the television;
and the MIC3 is used for collecting a fifth sound signal played by the television and a seventh sound signal played by the wireless sound equipment.
Preferably, the HDMI module is connected with an HDMI interface, and the HDMI interface is used for connecting a television;
the HDMI module transmits the fourth sound signal to an HDMI interface, the HDMI interface receives the fourth sound signal, the fourth sound signal is transmitted by a standard HDMI protocol to generate a fifth sound signal, the fifth sound signal is transmitted to the HDMI interface of the television, and after audio enters the television, the audio is processed by the audio of the television to be played by a television loudspeaker.
Preferably, the wireless transmitting module receives a sixth sound signal, modulates and wirelessly transmits the sixth sound signal, supports one-to-many wireless transmission by adopting an own communication protocol, generates a seventh sound signal for transmitting to the wireless sound equipment for playing, and the wireless receiving module of the wireless sound equipment receives the seventh sound signal for playing the sound equipment.
Preferably, the USB detection device 2 is built in the OTT box or is externally installed as USB dongle equipment.
Through implementing above technical scheme, have following technological effect: the utility model provides an audio-visual system can test the time delay that causes because of television audio signal handles to when the external stereo set transmission audio frequency of broadcast equipment that the time delay is short, compensate this time delay, realize watching the film, listen the synchronous sound production of music scene. Secondly, through wireless transmitting module for the box has the function of wireless transmission multichannel audio frequency, through being connected with wireless stereo set, realizes that a plurality of loudspeaker see the film, listens the synchronous sound production of music scene, builds better home theater effect, improves user experience.
Drawings
Fig. 1 is a schematic diagram of a system structure of an audio/video system provided by the utility model.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is provided for the embodiments provided in the present invention with reference to the accompanying drawings.
Example one
As shown in fig. 1, it can be understood that the audio/video system provided in this embodiment includes: the novel OTT box comprises a host 1, a USB detection device 2 and an MIC3, wherein the host 1 comprises a CPU, an audio player and an HDMI module, the USB detection device 2 comprises a USB interface, an acoustic card processor and a wireless transmission module, the host 1 and the USB detection device 2 are connected through the USB interface, the host 1 is connected with an MIC3, and the HDMI interface is used for connecting the novel OTT box to a television;
the audio player is used for playing audio and transmitting the audio to the USB interface;
the USB interface is used for receiving the audio, transmitting the audio according to a standard USB protocol, generating a first sound signal and transmitting the first sound signal to the sound card processor;
the sound card processor is used for receiving the first sound signal, carrying out audio distribution transmission on the first sound signal by using an audio input and output channel of the sound card, and generating a second sound signal and a sixth sound signal,
and transmitting the second sound signal to a USB interface, and transmitting the sixth sound signal to the wireless transmitting module,
and is connected with the CPU of the host computer through the USB interface for transmission control; the sound card processor is connected with the wireless transmitting module and controls the transmission of the wireless transmitting module;
the wireless transmitting module is used for receiving a sixth sound signal, modulating and wirelessly transmitting the sixth sound signal, supporting one-to-many wireless transmission by adopting an own communication protocol, and generating a seventh sound signal which is transmitted to the wireless receiving module in the wireless sound equipment and played;
the USB interface is used for receiving the second sound signal, transmitting the second sound signal according to a standard USB protocol, generating a third sound signal and transmitting the third sound signal to the HDMI module; the USB interface is also used for communication control between the host and the USB detection device.
The HDMI module is used for receiving a third sound signal, transmitting the third sound signal by using a standard HDMI protocol, generating a fourth sound signal and transmitting the fourth sound signal to an HDMI interface;
the HDMI interface is used for receiving the fourth sound signal, transmitting the fourth sound signal by using a standard HDMI protocol to generate a fifth sound signal, transmitting the fifth sound signal to the HDMI interface of the television, and processing audio to a television loudspeaker for playing after the audio enters the television;
and the MIC3 is used for collecting a fifth sound signal played by the television and a seventh sound signal played by the wireless sound equipment.
Furthermore, the HDMI module is connected with an HDMI interface, and the HDMI interface is used for connecting a television; the HDMI module transmits the fourth sound signal to an HDMI interface, the HDMI interface receives the fourth sound signal, the fourth sound signal is transmitted by a standard HDMI protocol to generate a fifth sound signal, the fifth sound signal is transmitted to the HDMI interface of the television, and after audio enters the television, the audio is processed by the audio of the television to be played by a television loudspeaker.
The wireless transmitting module receives a sixth sound signal, modulates and wirelessly transmits the sixth sound signal, supports one-to-many wireless transmission by adopting an own communication protocol, generates a seventh sound signal for transmitting to a wireless sound box for playing, and the wireless receiving module of the wireless sound box receives the seventh sound signal for playing the sound box.
In this embodiment, the novel OTT box is a novel OTT box of novel television that has the wireless transmission audio function, and can compensate audio playback time delay, USB detection device 2 in the novel OTT box cooperates with host computer 1 and can test the audio delay of specific television, and this time delay is compensated to rethread wireless transmission module. Specifically, after the audio playing device starts playing audio, there are two audio lines:
the audio player plays audio and transmits the audio to a USB interface, and the USB interface receives the audio, transmits the audio, generates a first sound signal and transmits the first sound signal to the sound card processor; the sound card processor receives the first sound signal, performs audio distribution transmission on the first sound signal, generates a second sound signal, and transmits the second sound signal to the USB interface; the USB interface receives a second sound signal, transmits the second sound signal, generates a third sound signal and transmits the third sound signal to the HDMI module; the HDMI module receives a third sound signal, transmits the third sound signal, generates a fourth sound signal, and transmits the fourth sound signal to the HDMI; and the HDMI interface receives the fourth sound signal, transmits the fourth sound signal, generates a fifth sound signal and transmits the fifth sound signal to a television loudspeaker for playing.
Secondly, the audio player plays audio and transmits the audio to a USB interface, and the USB interface receives the audio, transmits the audio, generates a first sound signal and transmits the first sound signal to the sound card processor; the sound card processor receives the first sound signal, performs audio distribution transmission on the first sound signal, generates a sixth sound signal, and transmits the sixth sound signal to the wireless transmitting module; and the wireless transmitting module receives a sixth sound signal, modulates and wirelessly transmits the sixth sound signal, generates a seventh sound signal and transmits the seventh sound signal to the wireless sound box for playing.
The novel OTT box carries out detection delay steps as follows: firstly, cutting off an original audio channel, and calculating the time t1 from the audio player playing the audio to the audio transmission to the USB interface; acquiring a signal when the television loudspeaker plays audio when the first audio circuit is completed through MIC3, and detecting and recording the time t2 by the host 1; calculating the normal television playing time as follows: T1-T2-T1; acquiring a signal when the second audio circuit is finished and the wireless sound loudspeaker plays audio through MIC3, and detecting and recording the time T2 by the host 1; the time of delay T3-T1-T2 is calculated.
The playing time T2 of the wireless sound is a fixed value, and the wireless sound can be directly preset in the system without testing during use, and is transmitted according to the two paths when audio is actually played, wherein after the first path is transmitted to a television, the first path is subjected to digital processing, digital-to-analog conversion and power amplification inside the television and then is played to a television loudspeaker; the second path is transmitted to the wireless sound for playing, and when the USB detection device 2 transmits the wireless sound, the delay time T3 obtained by the calculation is added, so that the synchronous sound production of a plurality of loudspeakers for watching films and listening to music scenes can be realized. In this embodiment, the communication protocol of the wireless transmitting module can realize one-to-many and can be externally connected with a plurality of wireless sound boxes. Further, in this embodiment, the USB detection device 2 may be built in the OTT box, or may be externally disposed as USB dongle equipment. The USB detection device 2 can be built in and can also be connected with a novel OTT box as a small plug-in of a USB.
The above detailed description is given to the audio-visual system provided by the embodiment of the present invention, and to the general technical personnel in the field, there are changes on the specific implementation and application range according to the idea of the embodiment of the present invention, to sum up, the content of this specification should not be understood as the limitation to the present invention.
Claims (4)
1. An audio-visual system, comprising: the novel OTT box comprises a host (1), a USB detection device (2) and an MIC (microphone) (3), wherein the host (1) comprises a CPU (Central processing Unit), an audio player and an HDMI (high-definition multimedia interface) module, the USB detection device (2) comprises a USB interface, an acoustic card processor and a wireless transmitting module, the host (1) and the USB detection device (2) are connected through the USB interface, the host (1) is connected with the MIC (3), and the HDMI is used for connecting the novel OTT box to a television;
the audio player is used for playing audio and transmitting the audio to the USB interface;
the USB interface is used for receiving the audio, transmitting the audio according to a standard USB protocol, generating a first sound signal and transmitting the first sound signal to the sound card processor;
the sound card processor is used for receiving the first sound signal, carrying out audio distribution transmission on the first sound signal by using an audio input and output channel of the sound card, and generating a second sound signal and a sixth sound signal,
and transmitting the second sound signal to a USB interface, and transmitting the sixth sound signal to the wireless transmitting module,
and is connected with the CPU of the host computer through the USB interface for transmission control; the sound card processor is connected with the wireless transmitting module and controls the transmission of the wireless transmitting module;
the wireless transmitting module is used for receiving a sixth sound signal, modulating and wirelessly transmitting the sixth sound signal, supporting one-to-many wireless transmission by adopting an own communication protocol, and generating a seventh sound signal which is transmitted to the wireless receiving module in the wireless sound equipment and played;
the USB interface is used for receiving the second sound signal, transmitting the second sound signal according to a standard USB protocol, generating a third sound signal and transmitting the third sound signal to the HDMI module; the USB interface is also used for transmitting control between the host and the USB detection device;
the HDMI module is used for receiving a third sound signal, transmitting the third sound signal by using a standard HDMI protocol, generating a fourth sound signal and transmitting the fourth sound signal to an HDMI interface;
the HDMI interface is used for receiving the fourth sound signal, transmitting the fourth sound signal by using a standard HDMI protocol to generate a fifth sound signal, transmitting the fifth sound signal to the HDMI interface of the television, and processing audio to a television loudspeaker for playing after the audio enters the television;
and the MIC (3) is used for acquiring a fifth sound signal played by the television and a seventh sound signal played by the wireless sound equipment.
2. The audio-visual system according to claim 1, wherein the HDMI module is connected to an HDMI interface, and the HDMI interface is used for connecting to a television;
the HDMI module transmits the fourth sound signal to an HDMI interface, the HDMI interface receives the fourth sound signal, the fourth sound signal is transmitted by a standard HDMI protocol to generate a fifth sound signal, the fifth sound signal is transmitted to the HDMI interface of the television, and after audio enters the television, the audio is processed by the audio of the television to be played by a television loudspeaker.
3. The audio/video system according to claim 1, wherein the wireless transmitter module receives a sixth audio signal, modulates and wirelessly transmits the sixth audio signal, supports one-to-many wireless transmission using an own communication protocol, and generates a seventh audio signal for transmission to the wireless audio device for playback, and the wireless receiver module of the wireless audio device receives the seventh audio signal for playback.
4. The audio-visual system according to claim 1, characterized in that the USB detection device (2) is built in the OTT box or is externally installed as USB dongle device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022685717.8U CN213693982U (en) | 2020-11-18 | 2020-11-18 | Audio-video system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022685717.8U CN213693982U (en) | 2020-11-18 | 2020-11-18 | Audio-video system |
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| CN213693982U true CN213693982U (en) | 2021-07-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112333512A (en) * | 2020-11-18 | 2021-02-05 | 深圳巴金科技有限公司 | Audio-visual system, audio delay detection method and audio-visual watching scene synchronization method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112333512A (en) * | 2020-11-18 | 2021-02-05 | 深圳巴金科技有限公司 | Audio-visual system, audio delay detection method and audio-visual watching scene synchronization method |
| CN112333512B (en) * | 2020-11-18 | 2024-04-12 | 深圳巴金科技有限公司 | Audio and video system, audio delay detection method and audio and video watching scene synchronization method |
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