CN113067996A - HDMI switcher and HDMI switching system - Google Patents
HDMI switcher and HDMI switching system Download PDFInfo
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Abstract
The embodiment of the invention relates to the field of audio and video product design, and discloses an HDMI switcher.A control unit is used for sending audio format identification data to an external signal source so that the external signal source can identify a first audio format supported by the HDMI switcher according to the audio format identification data, and sending a first audio signal matched with the first audio format to an external receiving device; the audio processing unit is further configured to receive the ARC audio signal matching the first audio format from the external receiving device through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device through the second ARC audio return channel. The HDMI switcher and the HDMI switching system provided by the embodiment of the invention can support ARC audio return between an external power amplifier device and an external receiving device (such as a television) so as to obtain high-quality audio.
Description
Technical Field
The embodiment of the invention relates to the field of audio and video product design, in particular to an HDMI switcher and an HDMI switching system.
Background
HDMI (High Definition Multimedia Interface) is a fully digital audio/video Interface. The HDMI interface product is very common and is mainly applied to DVD/blue-ray players, televisions, A/V digital power amplifiers and other devices.
Although the conventional HDMI switch processes the audio signal and outputs the processed audio signal to an optical fiber or a speaker, or outputs the processed audio signal to an external receiving device (e.g., a television), the sound quality of the processed audio signal is still unsatisfactory. The best equipment of tone quality is power amplifier equipment in the existing market, and the user can directly transmit the uncompressed high-quality audio of an external receiving device (such as a television) back to the power amplifier equipment to enjoy wonderful hearing experience.
However, the inventor finds that some external receiving devices (such as televisions) on the market currently do not support ARC audio return, and cannot be directly connected with power amplifier equipment to obtain high-quality audio.
Disclosure of Invention
An object of embodiments of the present invention is to provide an HDMI switch and an HDMI switching system, which can support ARC audio return between an external power amplifier device and an external receiving device (e.g., a television) to obtain high-quality audio.
To solve the above technical problem, an embodiment of the present invention provides an HDMI switch, including: the control unit and the audio processing unit are connected with the control unit; the HDMI switcher is provided with a first ARC audio return channel and a second ARC audio return channel; the control unit is used for sending audio format identification data to an external signal source, so that the external signal source can identify a first audio format supported by the HDMI switcher according to the audio format identification data, and sending a first audio signal matched with the first audio format to an external receiving device; the audio processing unit is further configured to receive the ARC audio signal matching the first audio format from the external receiving apparatus through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device through the second ARC audio return channel.
Compared with the related art, the embodiment of the invention provides an HDMI switcher, which comprises: the control unit and the audio processing unit are connected with the control unit; the HDMI switcher is provided with a first ARC audio return channel and a second ARC audio return channel; the control unit is used for sending audio format identification data to an external signal source, so that the external signal source can identify a first audio format supported by the HDMI switcher according to the audio format identification data, and sending a first audio signal matched with the first audio format to an external receiving device; the audio processing unit is further configured to receive the ARC audio signal matching the first audio format from the external receiving apparatus through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device through the second ARC audio return channel.
In the HDMI switch provided in this embodiment, the control unit is configured to send the audio format identification data to an external signal source, where the external signal source identifies a first audio format supported by the HDMI switch according to the audio format identification data, and sends a first audio signal matching the first audio format to an external receiving device; the external receiving device can transmit the ARC audio signal matched with the first audio format back to the audio processing unit of the HDMI switcher through the first ARC audio back channel, and the audio processing unit transmits the ARC audio signal matched with the first audio format back to the external power amplification equipment through the second ARC audio back channel, so that ARC audio back transmission between the external power amplification equipment and the external receiving device (such as a television) can be realized, and high-quality audio can be obtained.
In addition, the HDMI switcher includes: a first CEC communication channel; and the control unit is used for realizing communication handshake with the external power amplifier equipment through the first CEC communication channel before the audio processing unit transmits the ARC audio signal matched with the first audio format back to the external power amplifier equipment through the second ARC audio back transmission channel.
In addition, the HDMI switcher further includes: the audio and video processing unit is connected with the control unit; the control unit is also used for acquiring parameters supported by the external receiving device and sending the parameters to the audio and video processing unit; the audio and video processing unit is used for receiving audio and video signals from the external signal source, extracting video signals in the audio and video signals, processing the video signals according to the video parameters, and sending the processed video signals to the external receiving device.
In addition, the audio and video processing unit is connected with the audio processing unit; the audio and video processing unit is also used for extracting a second audio signal matched with the first audio format from the audio and video signals and sending the second audio signal matched with the first audio format to the audio processing unit; and the audio processing unit is further configured to send a second audio signal matched with the first audio format to the external power amplifier device through the second ARC audio return channel.
In addition, the HDMI switcher includes: an HDMI input/output interface; the control unit is used for realizing communication handshake with the external signal source through the HDMI input/output interface before the audio/video processing unit receives the audio/video signals from the external signal source.
In addition, the HDMI switcher includes: a second CEC communication channel; the control unit is configured to implement a communication handshake with the external receiving apparatus through the second CEC communication channel before the audio processing unit receives the ARC audio signal matching the first audio format from the external receiving apparatus.
An embodiment of the present invention further provides an HDMI switching system, including: the HDMI switcher comprises an ARC audio return channel, an external power amplifier device connected with the HDMI switcher, and an external receiving device connected with the HDMI switcher through the ARC audio return channel; the HDMI switcher includes: the control unit and the audio processing unit are connected with the control unit; the control unit is used for sending audio format identification data to an external signal source, so that the external signal source can identify a first audio format supported by the HDMI switcher according to the audio format identification data, and sending a first audio signal matched with the first audio format to an external receiving device; the audio processing unit is further configured to receive the ARC audio signal matching the first audio format from the external receiving apparatus through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device through the second ARC audio return channel.
In addition, the HDMI switcher includes: a first CEC communication channel; and the control unit is used for realizing communication handshake with the external power amplifier equipment through the first CEC communication channel before the audio processing unit transmits the ARC audio signal matched with the first audio format back to the external power amplifier equipment through the second ARC audio back transmission channel.
In addition, the HDMI switching system further includes: an external signal source connected to the HDMI switcher; the HDMI switcher further includes: the audio and video processing unit is connected with the control unit; the control unit is also used for acquiring parameters supported by the external receiving device and sending the parameters to the audio and video processing unit; the audio and video processing unit is used for receiving audio and video signals from the external signal source, extracting video signals in the audio and video signals, processing the video signals according to the video parameters, and sending the processed video signals to the external receiving device.
In addition, the audio and video processing unit is connected with the audio processing unit; the audio and video processing unit is also used for extracting a second audio signal matched with the first audio format from the audio and video signals and sending the second audio signal matched with the first audio format to the audio processing unit; and the audio processing unit is further configured to send a second audio signal matched with the first audio format to the external power amplifier device through the second ARC audio return channel.
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One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of an HDMI switch according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an HDMI switching system according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to an HDMI switch, and the core of the embodiment is to include: the control unit and the audio processing unit are connected with the control unit; the HDMI switcher is provided with a first ARC audio return channel and a second ARC audio return channel; the control unit is used for sending the audio format identification data to an external signal source, so that the external signal source can identify a first audio format supported by the HDMI switcher according to the audio format identification data, and sending a first audio signal matched with the first audio format to an external receiving device; the audio processing unit is further configured to receive the ARC audio signal matching the first audio format from the external receiving device through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device through the second ARC audio return channel.
In the HDMI switch provided in this embodiment, the control unit is configured to send the audio format identification data to an external signal source, where the external signal source identifies a first audio format supported by the HDMI switch according to the audio format identification data, and sends a first audio signal matching the first audio format to an external receiving device; the external receiving device can transmit the ARC audio signal matched with the first audio format back to the audio processing unit of the HDMI switcher through the first ARC audio back channel, and the audio processing unit transmits the ARC audio signal matched with the first audio format back to the external power amplification equipment through the second ARC audio back channel, so that ARC audio back transmission between the external power amplification equipment and the external receiving device (such as a television) can be realized, and high-quality audio can be obtained.
The implementation details of the HDMI switch according to this embodiment are described in detail below, and the following description is only provided for the convenience of understanding, and is not necessary to implement this embodiment.
The HDMI switch 1 of the present embodiment is schematically shown in fig. 1:
some external receiving devices (such as televisions) on the market currently do not support ARC audio return, and cannot be directly connected with power amplifier equipment to obtain high-quality audio. In view of this, the present embodiment proposes an HDMI switch 1 including: a control unit 11 and an audio processing unit 12 connected with the control unit 11. The HDMI switch 1 further has a first ARC audio return channel and a second ARC audio return channel, and the HDMI switch 1 communicates with an external receiving device (e.g. a television) through the first ARC audio return channel and communicates with an external power amplifier through the second ARC audio return channel.
The control unit 11 sends the audio format identification data to the external signal source, so that the external signal source identifies the first audio format supported by the HDMI switcher according to the audio format identification data, and sends the first audio signal matching the first audio format to the external receiving device (e.g., a television). The audio processing unit 12 receives the ARC audio signal matching the first audio format from the external receiving device through the first ARC audio return channel, and returns the ARC audio signal matching the first audio format to the external power amplifier through the second ARC audio return channel. Therefore, ARC audio return can be realized between the external power amplifier equipment and an external receiving device (such as a television) which does not support ARC audio return function, so that high-quality audio can be obtained. The audio format identification data may be display identification data (EDID).
In some embodiments, the HDMI switcher 1 has: a first CEC communication channel; the control unit 11 is configured to implement communication handshake with the external power amplifier device through the first CEC communication channel before the audio processing unit 12 returns the ARC audio signal matched with the first audio format to the external power amplifier device through the second ARC audio return channel.
It should be noted that, the HDMI switch 1 in this embodiment is connected to an external receiving device (e.g. a television) and an external power amplifier device through HDMI cables, but the channels of the HDMI cables used are different when transmitting different signals. For example: the above mentioned external receiving device (e.g. tv) returns the audio signal to the HDMI switcher 1 through the first ARC audio return channel of the HDMI cable; the HDMI switcher 1 sends the audio signal to the external power amplifier device through a second ARC audio return channel of the HDMI cable; the HDMI switcher 1 and the external power amplifier device realize communication handshake through the first CEC communication channel.
Since the parameters supported by different external receiving devices (e.g. televisions) may be different, common parameters are for example: color space (color space), color depth (deep color), resolution, etc. Therefore, when the parameters supported by the external receiving device (e.g. television) are different from the video parameters transmitted by the external signal source (e.g. set-top box, smart phone, tablet, etc.), the quality of the video displayed by the external receiving device (e.g. television) is greatly affected.
To this end, the HDMI switcher 1 further includes: an audio/video processing unit 13 connected to the control unit 11; the control unit 11 is further configured to obtain parameters supported by an external receiving device, and send the parameters to the audio/video processing unit 13; the audio and video processing unit 13 is configured to receive an audio and video signal from an external signal source, extract a video signal from the audio and video signal, process the video signal according to a video parameter, and send the processed video signal to an external receiving device.
Specifically, the HDMI switch 1 of the present embodiment is connected to an external signal source (e.g., a set-top box, a smart phone, a tablet, etc.) through an HDMI cable. In this way, signal transmission can be realized between an external receiving device (such as a television) supporting different parameters and an external signal source (such as a set-top box, a smart phone, a tablet and the like).
In some embodiments, the audio/video processing unit 13 is connected to the audio processing unit 12; the audio and video processing unit 13 is further configured to extract a second audio signal matching the first audio format from the audio and video signals, and send the second audio signal matching the first audio format to the audio processing unit 12; the audio processing unit 12 is further configured to send the second audio signal matched with the first audio format to the external power amplifier device through the second ARC audio return channel.
In this embodiment, after receiving an audio/video signal from an external signal source (e.g., a set-top box, a smart phone, a tablet, etc.), the audio/video processing unit 13 may not only process the video signal in the audio/video signal according to a video parameter supported by an external device (e.g., a television), but also send the processed video signal to an external receiving device (e.g., a television). And a second audio signal in the audio/video signal, which matches the first audio format supported by the external power amplifier device, can be directly extracted, the second audio signal matching the first audio format is sent to the audio processing unit 12, and the second audio signal matching the first audio format is transmitted back to the external power amplifier device through the second ARC audio return channel by the audio processing unit 12.
Therefore, the method can support the realization of audio return between external power amplification equipment with different parameters and external signal sources (such as set top boxes, smart phones, flat panels and the like) so as to obtain high-quality audio.
It is worth mentioning that the HDMI switch 1 includes: an HDMI input/output interface; the control unit 11 is configured to implement communication handshake with an external signal source through the HDMI input/output interface before the audio/video processing unit 12 receives an audio/video signal from the external signal source. That is, before the HDMI switch 1 transmits signals with an external signal source (e.g., a set-top box, a smart phone, a tablet, etc.), a communication handshake needs to be implemented through a differential signal line of an HDMI cable having an HDMI input/output interface, a communication link between the HDMI switch 1 and the external signal source (e.g., the set-top box, the smart phone, the tablet, etc.) is established, and preparation is made for implementing signal transmission between the HDMI switch 1 and the external signal source (e.g., the set-top box, the smart phone, the tablet, etc.).
In some embodiments, the HDMI switcher 1 includes: a second CEC communication channel; the control unit is configured to perform a communication handshake with the external receiving device through the second CEC communication channel before the audio processing unit 12 receives the ARC audio signal matching the first audio format from the external receiving device. That is, before the HDMI switch 1 transmits signals to an external receiving device (e.g., a tv), it is necessary to implement a communication handshake through the second CEC communication channel of the HDMI cable, establish a communication link between the HDMI switch 1 and the external receiving device (e.g., a tv), and prepare for signal transmission between the HDMI switch 1 and the external receiving device (e.g., a tv).
Compared with the related art, the control unit in the HDMI switch provided in this embodiment is configured to send the audio format identification data to the external signal source, and the external signal source identifies the first audio format supported by the HDMI switch according to the audio format identification data and sends the first audio signal matching the first audio format to the external receiving device; the external receiving device can transmit the ARC audio signal matched with the first audio format back to the audio processing unit of the HDMI switcher through the first ARC audio back channel, and the audio processing unit transmits the ARC audio signal matched with the first audio format back to the external power amplification equipment through the second ARC audio back channel, so that ARC audio back transmission between the external power amplification equipment and the external receiving device (such as a television) can be realized, and high-quality audio can be obtained.
In addition, in the embodiment, the control unit 11 in the HDMI switcher 1 can obtain the parameters supported by the external receiving device and send the parameters to the audio/video processing unit 13; the audio and video processing unit 13 is configured to receive an audio and video signal from an external signal source, extract a video signal from the audio and video signal, process the video signal according to a video parameter, and send the processed video signal to an external receiving device. External receiving devices (e.g., televisions) that are also capable of supporting different video parameters have better display quality.
The HDMI switch 1 according to the present invention can transmit uncompressed high-quality audio back to an external power amplifier to obtain high-quality audio, thereby solving the problem of insufficient audio quality output by an external receiving device (e.g., a television) and the conventional HDMI switch 1. Meanwhile, the problem that the power amplifier equipment with only one HDMI output port is limited in use environment can be solved.
A second embodiment of the present invention relates to an HDMI switching system, and a schematic configuration diagram of the present embodiment is shown in fig. 2, and includes: the HDMI switch 1 having a first ARC audio return channel and a second ARC audio return channel, the external power amplifier device 3 connected to the HDMI switch 1 through the second ARC audio return channel, and the external receiving device 2 connected to the HDMI switch 1 through the first ARC audio return channel.
The HDMI switcher 1 includes: a control unit 11, an audio processing unit 12 connected to the control unit 11; the control unit 11 is configured to send the audio format identification data to the external signal source 4, so that the external signal source 4 identifies the first audio format supported by the HDMI switcher 1 according to the audio format identification data, and sends the first audio signal matching the first audio format to the external receiving apparatus 2; the audio processing unit 12 is further configured to receive the ARC audio signal matching the first audio format from the external receiving apparatus 2 through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device 2 through the second ARC audio return channel. The audio format identification data may be display identification data (EDID).
Some external receiving devices 2 (e.g. tv) on the market currently do not support ARC audio backhaul, and cannot be directly connected to the power amplifier 3 to obtain high quality audio. For this, in this embodiment, the audio processing unit 12 receives the ARC audio signal matching the first audio format from the external receiving device 2 through the first ARC audio return channel, and returns the ARC audio signal matching the first audio format to the external power amplifier device 3 through the second ARC audio return channel. Thus, the ARC audio return between the external power amplifier device 3 and the external receiving device 2 (such as a television) can be realized, so as to obtain high-quality audio.
The HDMI switcher 1 in the present embodiment includes: a first CEC communication channel; the control unit 11 is configured to implement communication handshake with the external power amplifier device 3 through the first CEC communication channel before the audio processing unit 12 returns the ARC audio signal matched with the first audio format to the external power amplifier device 3 through the second ARC audio return channel.
Specifically, the HDMI switcher 1 is connected to the external receiving apparatus 2 (e.g., a television) and the external power amplifier device 3 via HDMI cables, but the channels of the HDMI cables used are different when different signals are transmitted. For example: the above mentioned external receiving device 2 (e.g. tv) returns the audio signal to the HDMI switcher 1 through the first ARC audio return channel of the HDMI cable; the HDMI switcher 1 sends the audio signal to the external power amplifier device 3 through a second ARC audio return channel of the HDMI cable; the HDMI switch 1 and the external power amplifier device 3 realize communication handshake through the first CEC communication channel.
Since the parameters supported by different external receiving devices 2 (e.g. televisions) may be different, common parameters are for example: color space (color space), color depth (deep color), resolution, etc. Therefore, when the parameters supported by the external receiving device 2 (e.g. television) are different from the video parameters transmitted by the external signal source 4 (e.g. set-top box, smart phone, tablet, etc.), the quality of the video displayed by the external receiving device 2 (e.g. television) is greatly affected.
To this end, in some embodiments, the HDMI switching system further comprises: an external signal source 4 connected to the HDMI switcher 1; the HDMI switcher 1 further includes: an audio/video processing unit 13 connected to the control unit 11; the control unit 11 is further configured to obtain parameters supported by the external receiving device 2, and send the parameters to the audio/video processing unit 13; the audio and video processing unit 13 is configured to receive an audio and video signal from the external signal source 4, extract a video signal from the audio and video signal, process the video signal according to the video parameter, and send the processed video signal to the external receiving device 2. Thus, an external receiving device (such as a television) capable of supporting different video parameters has better display image quality.
In some embodiments, the audio/video processing unit 13 is connected to the audio processing unit 11; the audio and video processing unit 13 is further configured to extract a second audio signal matching the first audio format from the audio and video signals, and send the second audio signal matching the first audio format to the audio processing unit 11; the audio processing unit 11 is further configured to send the second audio signal matched with the first audio format to the external power amplifier device 3 through the second ARC audio return channel.
In this embodiment, after receiving the audio/video signal from the external signal source 4 (e.g., a set-top box, a smart phone, a tablet, etc.), the audio/video processing unit 13 may not only process the video signal in the audio/video signal according to the video parameter supported by the external receiving device 2 (e.g., a television), but also send the processed video signal to the external receiving device 2 (e.g., a television). And a second audio signal in the audio/video signal, which matches the first audio format supported by the external power amplifier device 3, may also be directly extracted, and the second audio signal matching the first audio format is sent to the audio processing unit 12, and the second audio signal matching the first audio format is sent back to the external power amplifier device 3 through the second ARC audio return channel by the audio processing unit 12. Therefore, the audio return between the external power amplifier equipment 3 with different video parameters and the external signal source 4 (such as a set top box, a smart phone, a tablet and the like) can be supported, so that high-quality audio can be obtained.
It is to be understood that the HDMI switch 1 of the present embodiment is the same as the HDMI switch 1 of the first embodiment, and therefore, the details of the HDMI switch 1 of the first embodiment are still valid in the present embodiment, and are not repeated herein in order to reduce the repetition.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. An HDMI switch, comprising: the control unit and the audio processing unit are connected with the control unit;
the HDMI switcher is provided with a first ARC audio return channel and a second ARC audio return channel;
the control unit is used for sending audio format identification data to an external signal source, so that the external signal source can identify a first audio format supported by the HDMI switcher according to the audio format identification data, and sending a first audio signal matched with the first audio format to an external receiving device;
the audio processing unit is further configured to receive the ARC audio signal matching the first audio format from the external receiving apparatus through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device through the second ARC audio return channel.
2. The HDMI switch of claim 1, wherein said HDMI switch comprises: a first CEC communication channel;
and the control unit is used for realizing communication handshake with the external power amplifier equipment through the first CEC communication channel before the audio processing unit transmits the ARC audio signal matched with the first audio format back to the external power amplifier equipment through the second ARC audio back transmission channel.
3. The HDMI switch of claim 1, further comprising: the audio and video processing unit is connected with the control unit;
the control unit is also used for acquiring video parameters supported by the external receiving device and sending the video parameters to the audio and video processing unit;
the audio and video processing unit is used for receiving audio and video signals from the external signal source, extracting video signals in the audio and video signals, processing the video signals according to the video parameters, and sending the processed video signals to the external receiving device.
4. The HDMI switcher of claim 3, wherein the audio/video processing unit is connected to the audio processing unit;
the audio and video processing unit is also used for extracting a second audio signal matched with the first audio format from the audio and video signals and sending the second audio signal matched with the first audio format to the audio processing unit;
and the audio processing unit is further configured to send a second audio signal matched with the first audio format to the external power amplifier device through the second ARC audio return channel.
5. The HDMI switch of claim 3, wherein the HDMI switch comprises: an HDMI input/output interface;
the control unit is used for realizing communication handshake with the external signal source through the HDMI input/output interface before the audio/video processing unit receives the audio/video signals from the external signal source.
6. The HDMI switch of claim 1, wherein said HDMI switch comprises: a second CEC communication channel;
the control unit is configured to implement a communication handshake with the external receiving apparatus through the second CEC communication channel before the audio processing unit receives the ARC audio signal matching the first audio format from the external receiving apparatus.
7. An HDMI switching system, comprising: the HDMI switcher comprises a first ARC audio return channel and a second ARC audio return channel, an external power amplifier device connected with the HDMI switcher through the second ARC audio return channel, and an external receiving device connected with the HDMI switcher through the first ARC audio return channel;
the HDMI switcher includes: the control unit and the audio processing unit are connected with the control unit;
the control unit is used for sending audio format identification data to an external signal source, so that the external signal source can identify a first audio format supported by the HDMI switcher according to the audio format identification data, and sending a first audio signal matched with the first audio format to an external receiving device;
the audio processing unit is further configured to receive the ARC audio signal matching the first audio format from the external receiving apparatus through the first ARC audio return channel, and return the ARC audio signal matching the first audio format to the external power amplifier device through the second ARC audio return channel.
8. The HDMI switching system of claim 7, wherein the HDMI switch comprises: a first CEC communication channel;
and the control unit is used for realizing communication handshake with the external power amplifier equipment through the first CEC communication channel before the audio processing unit transmits the ARC audio signal matched with the first audio format back to the external power amplifier equipment through the second ARC audio back transmission channel.
9. The HDMI switching system of claim 7, further comprising: an external signal source connected to the HDMI switcher;
the HDMI switcher further includes: the audio and video processing unit is connected with the control unit;
the control unit is also used for acquiring parameters supported by the external receiving device and sending the parameters to the audio and video processing unit;
the audio and video processing unit is used for receiving audio and video signals from the external signal source, extracting video signals in the audio and video signals, processing the video signals according to the video parameters, and sending the processed video signals to the external receiving device.
10. The HDMI switching system of claim 9, wherein the audio/video processing unit is connected to the audio processing unit;
the audio and video processing unit is also used for extracting a second audio signal matched with the first audio format from the audio and video signals and sending the second audio signal matched with the first audio format to the audio processing unit;
and the audio processing unit is further configured to send a second audio signal matched with the first audio format to the external power amplifier device through the second ARC audio return channel.
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| CN202110290314.XA Pending CN113067996A (en) | 2021-03-18 | 2021-03-18 | HDMI switcher and HDMI switching system |
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