WO2018171579A1 - Procédé de fusion de signal audio externe et signal hdmi et connecteur hdmi - Google Patents

Procédé de fusion de signal audio externe et signal hdmi et connecteur hdmi Download PDF

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Publication number
WO2018171579A1
WO2018171579A1 PCT/CN2018/079585 CN2018079585W WO2018171579A1 WO 2018171579 A1 WO2018171579 A1 WO 2018171579A1 CN 2018079585 W CN2018079585 W CN 2018079585W WO 2018171579 A1 WO2018171579 A1 WO 2018171579A1
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signal
audio signal
digital
hdmi
analog
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PCT/CN2018/079585
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English (en)
Chinese (zh)
Inventor
王群
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北京君林科技股份有限公司
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Publication of WO2018171579A1 publication Critical patent/WO2018171579A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H04N21/43635—HDMI

Definitions

  • Embodiments of the present invention relate to the field of HDMI technologies, and in particular, to a method for merging an external audio signal and an HDMI signal, and to an HDMI connector.
  • VCD/DVD Traditional home multimedia devices include VCD/DVD and televisions, and the combination of these devices enables home karaoke entertainment.
  • VCD/DVD has gradually faded out of people's lives, and the TV as the protagonist of home entertainment has been transformed into cable digital TV.
  • Cable digital TV can receive digital TV programs through digital TV set-top boxes and cable TV networks.
  • the number of channels provided by cable digital TV has been greatly increased, and it can be as high as four or five hundred channels, and the sound quality and picture quality are greatly improved.
  • the digital digital signal transmission is performed between the set top box and the cable digital television through HDMI (High Definition Multimedia Interface). HDMI connectors are widely used in home appliances such as set-top boxes, DVDs, personal computers, digital audio and televisions.
  • VCD/DVD Since VCD/DVD has gradually faded out of people's lives, in addition to the need for a TV set for home karaoke entertainment, it is usually necessary to additionally configure a family karaoke jukebox, but the family karaoke jukebox takes up more space for family life, and The cost is relatively high.
  • Embodiments of the present invention provide a method for merging external audio signals and HDMI signals and an HDMI connector to implement home karaoke entertainment conveniently and at low cost.
  • an embodiment of the present invention provides a method for merging an external audio signal and an HDMI signal, where the method includes:
  • the step of separating the first audio signal and the video signal in the first HDMI signal comprises:
  • the first HDMI signal is converted into a first HDMI signal in the form of an analog signal, and the first audio signal in the form of an analog signal and the video signal in the form of an analog signal are separated.
  • the step of superimposing the external audio signal and the first audio signal to obtain a second audio signal includes:
  • the step of superimposing the external audio signal and the first audio signal to obtain a second audio signal further includes:
  • volume-adjusted external audio signal and the volume-adjusted first audio signal are superimposed to obtain a second audio signal.
  • the step of acquiring the first HDMI signal includes:
  • an embodiment of the present invention provides an HDMI connector, including a signal input port, a pickup, a separation unit, a superimposing unit, a combining unit, and a signal output port:
  • the signal input port is connected to the separation unit, the separation unit and the pickup are connected to the superposition unit, the separation unit and the superposition unit are connected to the combination unit, and the combination unit is connected to the signal output port ;
  • the signal input port is configured to acquire a first HDMI signal
  • the pickup for acquiring an external audio signal
  • the separating unit is configured to separate the first audio signal and the video signal in the first HDMI signal
  • the superimposing unit is configured to superimpose the external audio signal and the first audio signal to obtain a second audio signal
  • the combining unit is configured to combine the second audio signal and the video signal into a second HDMI signal
  • the signal output port is configured to output the second HDMI signal.
  • a knob for adjusting a volume of the first audio signal and the external audio signal the knob connecting an MCU chip for detecting a rotation angle of the knob, the MCU chip connection for adjusting a superimposing unit of the first audio signal and the volume level of the external audio signal.
  • the superimposing unit includes a first digital to analog converter, a second digital to analog converter, an operational amplifier, and an analog to digital converter;
  • the separating unit is connected to the first digital-to-analog converter, the pickup is connected to the second digital-to-analog converter, and the first digital-to-analog converter and the second digital-to-analog converter are connected to the operational amplifier,
  • the operational amplifier is coupled to the analog to digital converter, and the digital to analog converter is coupled to the combination unit.
  • the separating unit includes a first digital-to-analog converter
  • the superimposing unit includes a second digital-to-analog converter and an operational amplifier
  • the combining unit includes an analog-to-digital converter
  • the signal input port is connected to a first digital-to-analog converter
  • the pickup is connected to the second digital-to-analog converter
  • the second digital-to-analog converter are connected to an operational amplifier
  • the operational amplifier and the video output end of the first digital-to-analog converter are connected to an analog-to-digital converter, and the analog-to-digital converter is connected to the signal output port.
  • a first volume controller is connected between the audio output end of the first digital-to-analog converter and the operational amplifier, and a second volume is connected between the second digital-to-analog converter and the operational amplifier.
  • the controller, the first volume controller and the second volume controller are coupled to a knob for adjusting the volume of the first audio signal and the volume of the external audio signal.
  • the external audio signal is superimposed on the audio signal in the HDMI signal, and then the superimposed audio signal and the video signal in the HDMI signal are converted into a new HDMI signal, and finally transmitted to the multimedia device receiving the new HDMI signal. Playback, during the playback of the new HDMI signal, its quality is not affected by the superimposed signal, and the home karaoke can be realized conveniently and at low cost.
  • FIG. 1 is a flowchart of an embodiment of a method for merging an external audio signal and an HDMI signal according to an embodiment of the present invention
  • FIG. 2 is a flowchart of another embodiment of a method for merging an external audio signal and an HDMI signal according to an embodiment of the present invention
  • FIG. 3 is a flowchart of still another embodiment of a method for merging an external audio signal and an HDMI signal according to an embodiment of the present invention
  • FIG. 4 is a structural block diagram of an embodiment of an HDMI connector according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of another embodiment of an HDMI connector according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of an embodiment of a superimposing unit according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of another embodiment of a superimposing unit according to an embodiment of the present invention.
  • FIG. 8 is a structural block diagram of still another embodiment of an HDMI connector according to an embodiment of the present invention.
  • FIG. 9 is a structural block diagram of still another embodiment of an HDMI connector according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of an embodiment of a method for merging an external audio signal and an HDMI signal according to an embodiment of the present invention.
  • the embodiment of the present invention is described from the HDMI connector side.
  • the method may specifically include the following steps:
  • Step 101 Acquire a first HDMI signal and an external audio signal
  • two multimedia devices may be connected through an HDMI cable or an HDMI connector, such as a set top box and a television (including a cable digital TV and a smart TV). Connect between the HDMI connectors.
  • the first multimedia device eg, a set top box
  • the first HDMI signal is an HDMI signal sent by the first multimedia device to the HDMI connector.
  • the first HDMI signal is a digital signal, including an audio signal and a video signal.
  • embodiments of the present invention are applicable not only to set top boxes and television sets, but also to other multimedia devices, such as between a computer and a television, between a computer and an audio, between a television and an audio, and the like.
  • the first multimedia device may also be a mobile terminal, such as a mobile phone, a notebook, etc.
  • the audio and video signal sent by the mobile terminal to the HDMI connector may be a Mobile High-Definition Link (MHL) signal of the mobile terminal.
  • MHL Mobile High-Definition Link
  • the HDMI connector converts the MHL signal into an HDMI signal after acquiring the MHL signal.
  • the mobile terminal can send the MHL signal to the HDMI connector through the type-c interface or the USB Type C interface.
  • the second multimedia device may be any device that can play multimedia, such as a television, a projector, or an audio device.
  • the process of acquiring an external audio signal may include: receiving the external audio signal through a wireless data transmission channel; or receiving the external audio signal through a wired data transmission channel. Therefore, the external audio signal can be a wireless audio signal or a wired audio signal.
  • the external audio signal can be a digital signal or an analog signal.
  • an external audio signal can be sent to the HDMI connector through the pickup.
  • the pickup can be a microphone.
  • Step 102 separating the first audio signal and the video signal in the first HDMI signal.
  • the first HDMI signal received by the HDMI connector may be a digital signal, and the separated first audio signal and video signal may both be digital signals.
  • the first HDMI signal in the form of a digital signal may also be converted into an analog signal, and then the first HDMI signal in the form of an analog signal is separated into a first audio signal in the form of an analog signal and a video in the form of an analog signal. signal.
  • the first audio signal in the form of a digital signal is converted into a first audio signal in the form of an analog signal.
  • Step 103 superimposing the external audio signal and the first audio signal to obtain a second audio signal.
  • the external audio signal in the form of a digital signal and the first audio signal in the form of a digital signal may be superimposed to obtain a second audio signal in the form of a digital signal. It is also possible to superimpose an external audio signal in the form of an analog signal with a first audio signal in the form of an analog signal, thereby obtaining a second audio signal in the form of an analog signal.
  • the volume of the first audio signal and the external audio signal may be adjusted by adjusting the knob, where the first volume adjustment signal of the first audio signal and the external audio signal are obtained. a volume adjustment signal; adjusting a volume of the first volume adjustment signal according to the first volume adjustment signal, and adjusting a volume of the external audio signal according to the second volume adjustment signal; and superimposing the volume-adjusted external audio signal And the first audio signal after the volume adjustment, the second audio signal is obtained.
  • the adjustable design of the volume level of the first audio signal and the external audio signal can prevent a volume of the first audio signal and the external audio signal from being higher or lower, thereby improving the audible effect.
  • Step 104 combining the second audio signal and the video signal into a second HDMI signal.
  • the second audio signal in the form of a digital signal can be combined with the digital signal form video signal into a second HDMI signal.
  • the second audio signal in the form of an analog signal and the video signal in the form of an analog signal may be converted into a second audio signal in the form of a digital signal and a video signal in the form of a digital signal, respectively, and a second audio signal in the form of a digital signal and a digital signal.
  • the video signals in the form of signals are combined into a second HDMI signal.
  • the extraction of the audio signal, the superposition of the audio signal, and the superposition of the audio signal and the video signal can be performed at a high speed to avoid affecting the playback quality of the video and audio.
  • the song file may be stored in the first multimedia device, or the song software may be installed.
  • the song file may be stored in the song software, and the song file may be an audio format or an audio and video format.
  • the karaoke software is used to extract the specified song from the song library for playback.
  • the first multimedia device transmits the first HDMI signal including the background music to the HDMI connector, and the HDMI connector can receive the external audio signal including the human voice through the pickup, and then the first one containing the background music.
  • the HDMI signal is superimposed with the external audio signal including the human voice, and finally the superimposed second HDMI signal is played through the second multimedia device, so that the home karaoke can be realized conveniently and at low cost.
  • the audio signal in the second HDMI signal is an audio signal in which the background music and the human voice are superimposed, the audible effect can be improved.
  • the home karaoke can also be implemented by the following process: the first audio signal outputted by the first multimedia device and the external audio signal are acquired; And the second audio signal is obtained by the external audio signal and the first audio signal; and the second audio signal is sent to the second multimedia device.
  • the first multimedia device may be a computer or a television or the like, and the second multimedia device may be an audio.
  • the first multimedia device may be connected to the HDMI connector.
  • the audio signal containing the background music is output, and the HDMI connector superimposes the audio signal including the human voice with the audio signal containing the background music, and finally plays through the second multimedia device, thereby conveniently implementing the family karaoke.
  • FIG. 2 is a flowchart of another embodiment of a method for merging an external audio signal and an HDMI signal according to an embodiment of the present invention.
  • the method may specifically include the following steps:
  • Step 201 Acquire a first HDMI signal and an external audio signal.
  • Step 202 Extract a first audio signal in the form of a digital signal from the first HDMI signal to separate a first audio signal digital signal in the form of a digital signal in the first HDMI signal and a video signal in the form of a digital signal.
  • the first audio signal in the form of an extracted digital signal may include 1 to 8 audio channels. In an embodiment of the invention, the first audio signal in the form of an extracted digital signal comprises eight audio channels.
  • the video signal in the form of the digital signal remaining after the first audio signal is extracted is still transmitted according to the original channel, and the embodiment of the present invention does not change the transmission mode or the transmission channel of the video signal in the first HDMI signal. To ensure the normal playback of the final video signal.
  • Step 203 superimposing an external audio signal in the form of a digital signal and a first audio signal in the form of the digital signal to obtain a second audio signal in the form of a digital signal.
  • External audio signals can be transmitted on one or two audio channels.
  • the external audio signal is transmitted on one audio channel
  • the superimposition processing is performed, the one external audio signal is superimposed on each audio channel of the first audio signal, and the second audio signal including eight channels is still obtained.
  • the superimposition processing method does not destroy the original first audio signal, so the playback of the final multimedia signal is not affected.
  • the two external audio signals are respectively superimposed on any two audio channels of the first audio signal, and then the two external audio signals are performed. Mixing, superimposing into the remaining six audio channels in the first audio signal, also obtaining a second audio signal comprising eight channels.
  • the embodiment of the invention realizes that the external audio signal is superimposed with the HDMI signal transmitted in the HDMI connector to form a new HDMI signal, and finally sent to the second multimedia device for playing, in the process of playing the new HDMI signal,
  • the quality is not affected by the superimposed signals, and the home karaoke can be realized conveniently and at low cost.
  • the step 203 may specifically include: converting the first audio signal in the form of a digital signal into a first audio signal in the form of an analog signal; and superimposing the first audio signal and the analog signal in the form of an analog signal. Forming an external audio signal, resulting in a second audio signal in the form of an analog signal; converting the second audio signal in the form of the analog signal to a second audio signal in the form of a digital signal.
  • Step 204 combining the second audio signal in the form of a digital signal with the video signal in the form of a digital signal into a second HDMI signal.
  • FIG. 3 is a flowchart of still another embodiment of a method for merging an external audio signal and an HDMI signal according to an embodiment of the present invention.
  • the method may specifically include the following steps:
  • Step 301 Acquire a first HDMI signal and an external audio signal.
  • Step 302 Convert the first HDMI signal into a first HDMI signal in the form of an analog signal, and separate the first audio signal in the form of an analog signal and the video signal in the form of an analog signal.
  • the first HDMI signal can be converted into an analog signal and output 1 to 8 channels.
  • the output first audio signal comprises a left channel and a right channel.
  • Step 303 superimposing the first audio signal in the form of an analog signal and the external audio signal in the form of an analog signal to obtain a second audio signal in the form of an analog signal.
  • the external audio signal in the form of an analog signal may include 1 to 2 channels.
  • an external audio signal including one channel may be superimposed to each sound of the first audio signal in the process of superimposing the external audio signal into the first audio signal in the form of an analog signal.
  • a second audio signal in the form of an analog signal containing two channels is obtained.
  • the external audio signal in the form of an analog signal also includes two channels of the left and right channels
  • the external audio signal may be left and right in the process of superimposing the external audio signal into the first audio signal in the form of an analog signal in the form of an analog signal.
  • the channels are respectively superimposed into the left and right channels of the first audio signal, and a second audio signal in the form of an analog signal containing two channels is also obtained.
  • Step 304 Combine the second audio signal in the form of the analog signal with the video signal in the form of the analog signal into a second HDMI signal.
  • the second audio signal in the form of an analog signal and the video signal in the analog signal form may be converted into a second audio signal in the form of a digital signal and a video signal in the form of a digital signal, and then a second form in the form of a digital signal.
  • the audio signal is combined with the video signal in the form of a digital signal into a second HDMI signal.
  • the embodiment of the invention realizes that the external audio signal is superimposed with the HDMI signal transmitted in the HDMI connector to form a new HDMI signal, and finally sent to the second multimedia device for playing, in the process of playing the new HDMI signal,
  • the quality is not affected by the superimposed signals, and the home karaoke can be realized conveniently and at low cost.
  • the HDMI connector may specifically include: a signal input port 1, a pickup 2, a separation unit 3, a superimposing unit 4, a combining unit 5, and Signal output port 6.
  • the signal input port 1 is connected to the separation unit 3, the separation unit 3 and the pickup 2 are connected to the superposition unit 4, the separation unit 3 and the superposition unit 4 are connected to the combination unit 5, The combining unit 5 is connected to the signal output port 6.
  • the signal input port 1 is configured to acquire a first HDMI signal.
  • the pickup 2 is configured to acquire an external audio signal.
  • the separating unit 3 is configured to separate the first audio signal and the video signal in the first HDMI signal.
  • the superimposing unit 4 is configured to superimpose the external audio signal and the first audio signal to obtain a second audio signal.
  • the combining unit 5 is configured to combine the second audio signal and the video signal into a second HDMI signal.
  • the signal output port 6 is configured to output the second HDMI signal.
  • the signal input port 1 is further configured to acquire an MHL signal and convert the MHL signal into an HDMI signal to obtain a first HDMI signal.
  • the separation unit 3 may be configured to extract a first audio signal in the form of a digital signal from the first HDMI signal to separate a first audio signal in the form of a digital signal in the first HDMI signal Video signals in the form of digital signals and digital signals.
  • the pickup 2 can acquire an external audio signal in the form of a digital signal or an external audio signal in the form of an analog signal, and convert the external audio signal in the form of an analog signal into an external audio signal in the form of a digital signal.
  • the superimposing unit 4 can be used to superimpose a video signal in the form of a digital signal and an external audio signal in the form of a digital signal to obtain a second audio signal in the form of a digital signal.
  • the combining unit 5 is configured to combine the second audio signal in the form of a digital signal and the video signal in the form of a digital signal into a second HDMI signal, and then transmit the second HDMI signal to the multimedia device for playing through the signal output port 6.
  • the HDMI connector further includes a knob 7 for adjusting the volume of the first audio signal and the external audio signal, and the knob 7 is connected for detecting A Microcontroller Unit (MCU) chip 8 for rotating the knob 7, the MCU chip 8 is connected with a superimposing unit for adjusting the volume of the first audio signal and the volume of the external audio signal.
  • the HDMI connector can include a knob or two knobs 7. When a knob is included, the knob is used to adjust the ratio of the volume of the first audio signal and the volume of the external audio signal. When two knobs are included, the two knobs can respectively control the volume of the first audio signal and the external audio signal.
  • the MCU chip 8 acquires a first volume adjustment signal of the first audio signal and a second volume adjustment signal of the external audio signal by detecting a rotation angle of the knob 7.
  • the superimposing unit 4 is specifically configured to adjust a volume of the first volume adjustment signal according to the first volume adjustment signal, and adjust a volume of the external audio signal according to the second volume adjustment signal, and superimpose the volume adjusted The external audio signal and the volume-adjusted first audio signal obtain a second audio signal.
  • the superimposing unit 4 can use a DSP (Digital Signal Processing) chip, a single chip microcomputer or a codec.
  • the superimposing unit adopted in the embodiment of the invention can ensure that the superimposition process of the first audio signal and the external audio signal is completed within 15 ms, thereby ensuring that the entire processing process does not exceed 25 ms, which is far less than the minimum resolution time of the human ear (75 ms), so Does not affect the playback quality of audio and video.
  • the superimposing unit 4 is further limited to obtain a second embodiment.
  • the superimposing unit 4 may include a first digital-to-analog converter 9, a second digital-to-analog converter 10, an operational amplifier 11, and an analog-to-digital converter 12.
  • the separating unit 3 is connected to the first digital-to-analog converter 9, and the pickup 2 is connected to the second digital-to-analog converter 10, the first digital-to-analog converter 9 and the second digital-to-analog converter 10.
  • the operational amplifier 11 is connected, and the operational amplifier 11 is connected to the analog-to-digital converter 12, and the analog-to-digital converter 12 is connected to the combining unit 5.
  • the first digital-to-analog converter 9 is configured to convert the first audio signal in the form of a digital signal into a first audio signal in the form of an analog signal.
  • the second digital-to-analog converter 10 is configured to convert an external audio signal in the form of a digital signal into an external audio signal in the form of an analog signal.
  • the second digital-to-analog converter 10 may not be included.
  • the pickup 2 can be directly connected to the operational amplifier 11.
  • the operational amplifier 11 is configured to superimpose the first audio signal in the form of an analog signal and the external audio signal in the form of an analog signal to obtain a second audio signal in the form of an analog signal.
  • the analog to digital converter 12 is configured to convert the second audio signal in the form of the analog signal into a second audio signal in the form of a digital signal.
  • a first volume controller 13 is connected between the audio output end of the first digital-to-analog converter 9 and the operational amplifier 11, and the second digital mode
  • a second volume controller 14 is connected between the converter 10 and the operational amplifier 11, and the first volume controller 13 and the second volume controller 14 are connected for adjusting the first audio signal and the Knob 7 for the volume of the external audio signal.
  • the first volume controller 13 and the second volume controller 14 can be connected to the same knob, which can adjust the ratio of the volume of the first audio signal and the volume of the external audio signal.
  • the first volume controller 13 and the second volume controller 14 may also be respectively connected with a knob, and the two knobs respectively adjust the volume of the first audio signal and the external audio signal.
  • the separation unit 3 comprises a first digital-to-analog converter 9, which comprises a second digital-to-analog converter 10 and an operational amplifier 11, the combining unit 5 comprising an analog-to-digital converter 12.
  • the signal input port 1 is connected to a first digital-to-analog converter 9, the pickup 2 is connected to the second digital-to-analog converter 10, an audio output end of the first digital-to-analog converter 9 and the second digital-to-analog
  • the converter 10 is connected to an operational amplifier 11, and the operational amplifier 11 and the video output of the first digital-to-analog converter 9 are connected to an analog-to-digital converter 12, which is connected to the signal output port 6.
  • the first digital-to-analog converter 9 is configured to convert the first HDMI signal into a first HDMI signal in the form of an analog signal, and separate the first audio signal in the form of an analog signal and the video signal in the form of an analog signal.
  • the second digital-to-analog converter 10 is configured to convert an external audio signal in the form of a digital signal into an external audio signal in the form of an analog signal.
  • the external audio signal acquired by the pickup 2 is an external audio signal in the form of an analog signal
  • the second digital-to-analog converter 10 may not be included.
  • the pickup 2 can be directly connected to the operational amplifier 11.
  • the operational amplifier 11 is configured to superimpose the first audio signal in the form of an analog signal and the external audio signal in the form of an analog signal to obtain a second audio signal in the form of an analog signal.
  • the analog to digital converter 12 is configured to combine the second audio signal in the form of the analog signal with the video signal in the form of the analog signal into a second HDMI signal.
  • the audio output end of the first digital-to-analog converter 9 includes a left channel end and a right channel end, and the left channel end and the right channel end may be respectively connected to an operational amplifier 11.
  • the left channel end of the first digital to analog converter 9 and the left channel end of the second digital to analog converter 10 may be connected to the same operational amplifier 11 for superimposing the first audio signal and the left channel signal of the external audio signal.
  • the right channel end of the first digital to analog converter 9 and the right channel end of the second digital to analog converter 10 may be connected to another identical operational amplifier 11 for superimposing the first audio signal and the right channel of the external audio signal. signal.
  • the first digital-to-analog converter 9 can include three video output terminals: a video output terminal a, a video output terminal b, and a video output terminal c.
  • the video signal output by the first digital-to-analog converter 9 is directly transmitted to the analog-to-digital converter 12, and then converted together with the second audio signal, the HDMI signal is recovered, and finally transmitted to the multimedia device receiving the HDMI signal. Used for playback.
  • the embodiment of the invention realizes that the external audio signal is superimposed with the HDMI signal transmitted in the HDMI connector to form a new HDMI signal, and finally sent to the multimedia device receiving the HDMI signal for playing, in the process of playing the new HDMI signal,
  • the quality is not affected by the superimposed signals, and the home karaoke can be realized conveniently and at low cost.
  • a first volume controller 13 is connected between the audio output end of the first digital-to-analog converter 9 and the operational amplifier 11, the second digital-to-analog converter 10 and the operational amplifier.
  • a second volume controller 14 is connected between the first volume controller 13 and the second volume controller 14 for connecting a knob 7 for adjusting the volume of the first audio signal and the volume of the external audio signal.
  • the first volume controller 13 and the second volume controller 14 can be connected to the same knob, which can adjust the ratio of the volume of the first audio signal and the volume of the external audio signal.
  • the first volume controller 13 and the second volume controller 14 may also be respectively connected with a knob, and the two knobs respectively adjust the volume of the first audio signal and the external audio signal.
  • the embodiment of the present invention can be applied not only to the scene of the home karaoke entertainment, but also to other scenarios. For example, in a multimedia classroom or a multimedia conference, connecting a computer and an audio through the above HDMI connector can be explained while playing a video. Therefore, the embodiment of the present invention does not specifically limit the scenario of the application.
  • the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé de fusion d'un signal audio externe et d'un signal HDMI et un connecteur HDMI. Le procédé consiste : à acquérir un premier signal HDMI et un signal audio externe ; à séparer un premier signal audio et un signal vidéo dans le premier signal HDMI ; à superposer le signal audio externe et le premier signal audio pour obtenir un second signal audio ; et à combiner le second signal audio et le signal vidéo en un second signal HDMI. Dans les modes de réalisation de la présente invention, un signal audio externe est superposé sur un signal audio dans un signal HDMI, puis le signal audio superposé et le signal vidéo dans le signal HDMI sont convertis en un nouveau signal HDMI, et enfin le nouveau signal HDMI est envoyé à un dispositif multimédia de façon à recevoir le nouveau signal HDMI pour une lecture. Lors de la lecture du nouveau signal HDMI, la qualité du nouveau signal HDMI n'est pas affecté par le signal de superposition, et le karaoke à domicile peut être réalisé facilement à un faible coût.
PCT/CN2018/079585 2017-03-23 2018-03-20 Procédé de fusion de signal audio externe et signal hdmi et connecteur hdmi WO2018171579A1 (fr)

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