Switching control method of audio output path and display device

Abstract

This application relates to a switching control method for audio output paths and a display device. By adding an audio processing chip and a switching chip to the display device, the display chip converts video data input from an external device into a display signal and outputs it to the display. Both the display chip and the audio processing chip can receive audio data output from an external device. The controller controls the on / off state of the first and second audio paths based on feedback signals, so that the display chip or the audio processing chip can output audio data to the sound playback module, thereby enabling the display device to simultaneously display images and play sound.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a method for switching control of audio output paths and a display device. Background Technology

[0002] Display devices refer to terminal devices that can output specific display images. They can be based on Internet application technologies, have open operating systems and controllers, have open application platforms, realize two-way human-computer interaction functions, and integrate multiple functions such as audio-visual, entertainment, and data to meet the diverse and personalized needs of users.

[0003] The display device also has an external device interface, which allows it to connect to external devices to receive and play audio and video data. For example, the display device may have a Universal Serial Bus (USB) Type-C interface, allowing external devices such as hosts to connect to the display device and output audio and video data for display.

[0004] When an external device only supports HDMI (High Definition Multimedia Interface) output, it needs to be connected to the display device via an adapter cable. Since the HDMI protocol does not have an independent physical channel for audio transmission, the audio data is embedded in the video data in a data island structure. The two share the TMDS (Transition Minimized Differential Signaling) data channel for transmission. The display chip's video receiving interface will simultaneously receive the audio and video multiplexed data transmitted by the adapter cable. At this time, the display device can only display the picture and cannot play the sound, which seriously affects the user experience. Summary of the Invention

[0005] Therefore, it is necessary to provide an audio output path switching control method and display device that can solve the compatibility and adaptation problem of screen projection with different external device connectors, in order to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a display device, comprising:

[0007] A monitor is used to display images.

[0008] The audio playback module is used to play audio.

[0009] The display chip connects external devices and the monitor. It receives video and audio data from external devices, converts the video data into display signals, and outputs them to the monitor.

[0010] An audio processing chip connects to external devices and is used to receive audio data input from those devices.

[0011] The switching chip includes a first audio path connected between the display chip and the sound playback module, and a second audio path connected between the audio processing chip and the sound playback module.

[0012] The controller is connected to the display chip, audio processing chip, and switching chip respectively. The controller is configured as follows:

[0013] Receive feedback signals from the display chip and / or audio processing chip;

[0014] The on / off state of the first and second audio paths is controlled based on the feedback signal.

[0015] The above technical solution has the following advantages or effects: by adding an audio processing chip and a switching chip to the display device, the display chip converts the video data input from the external device into a display signal and outputs it to the display. Both the display chip and the audio processing chip can receive the audio data output from the external device. The controller controls the on / off state of the first audio path and the second audio path according to the feedback signal, so that the display chip or the audio processing chip can output the audio data to the sound playback module, thereby enabling the display device to display the picture and play the sound at the same time.

[0016] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0017] The controller is also configured as follows:

[0018] Upon receiving the first feedback signal and the second feedback signal, the system controls the first audio path to be turned on and the second audio path to be turned off.

[0019] The above technical solution has the following advantages or effects: the display chip has an internal time synchronization mechanism, which synchronously outputs display signals and audio data, thus ensuring the synchronization of the picture displayed and the sound played by the display device.

[0020] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0021] The controller is also configured as follows:

[0022] If a second feedback signal is received but a first feedback signal is not received, the first audio path is disconnected and the second audio path is turned on.

[0023] The above technical solution has the following advantages or effects: when only the audio processing chip receives audio data, the controller controls the second audio path to be turned on, and the audio processing chip outputs the audio data to the sound playback module. The display chip converts the video data input from the external device into a display signal and outputs it to the display, so that the display device can display the picture and play the sound at the same time.

[0024] In one embodiment, the display device further includes:

[0025] The comparator is connected to the display chip, audio processing chip, and controller respectively. The comparator is used to compare the timing of the received audio synchronization signal and the received video synchronization signal, and outputs a synchronization detection signal to the controller. The audio synchronization signal is output by the audio processing chip after receiving audio data input from the external device, and the video synchronization signal is output by the display chip after receiving audio data input from the external device.

[0026] The controller is also configured as follows:

[0027] If a second feedback signal is received but a first feedback signal is not received, the first audio path is disconnected, and the second audio path is turned on based on a synchronization detection signal.

[0028] The above technical solution has the following advantages or effects: A comparator is added to the display device. The comparator is used to compare the timing of the received audio synchronization signal and the timing of the received video synchronization signal, and outputs a synchronization detection signal to the controller. The controller controls the second audio path to be turned on based on the synchronization detection signal, thereby solving the problem of asynchronous playback sound and display screen.

[0029] In one embodiment, the controller is further configured to:

[0030] Based on the synchronization detection signal, the time difference between the moment when the audio synchronization signal is received and the moment when the video synchronization signal is received is determined.

[0031] Adjust the timing of the second audio path activation based on the time difference.

[0032] The above technical solution has the following advantages or effects: the controller determines the time difference between the moment the audio synchronization signal is received and the moment the video synchronization signal is received based on the synchronization detection signal, and adjusts the timing of the second audio path to be turned on according to the time difference, so as to synchronize the playback sound and the display screen.

[0033] In one embodiment, the audio processing chip includes:

[0034] The USB interface is used to connect external devices and receive audio data input from them.

[0035] The above technical solution has the following advantages or effects: the USB interface has strong anti-interference capabilities, which can ensure the sound quality of audio data.

[0036] In one embodiment, the sound playback module includes:

[0037] Power amplifier, connected to switching chip;

[0038] The speaker is connected to the power amplifier and is used to play audio.

[0039] The above technical solution has the following advantages or effects: by placing the power amplifier and speaker in the sound playback module, the loss and interference caused by external lines are avoided.

[0040] Secondly, this application also provides a method for switching control of audio output paths, applied to the display device described above, the method comprising:

[0041] Receive feedback signals from the display chip and / or audio processing chip;

[0042] The on / off state of the first and second audio paths is controlled based on the feedback signal.

[0043] The above technical solution has the following advantages or effects: the display chip converts the video data input from the external device into a display signal and outputs it to the display. The controller controls the on / off state of the first audio path and the second audio path according to the feedback signal, so that the display chip or audio processing chip can output audio data to the sound playback module, thereby enabling the display device to display the picture and play the sound at the same time.

[0044] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0045] Controlling the on / off state of the first and second audio paths based on feedback signals includes:

[0046] Upon receiving the first feedback signal and the second feedback signal, the system controls the first audio path to be turned on and the second audio path to be turned off.

[0047] The above technical solution has the following advantages or effects: There is a time synchronization mechanism inside the display chip. When the controller receives the first feedback signal and the second feedback signal, it controls the first audio path to be turned on and controls the second audio path to be turned off. At this time, the display chip synchronously outputs display signals and audio data, which can ensure the synchronization of the picture displayed by the display device and the sound played.

[0048] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0049] Controlling the on / off state of the first and second audio paths based on feedback signals includes:

[0050] If a second feedback signal is received but a first feedback signal is not received, the first audio path is disconnected and the second audio path is turned on.

[0051] The above technical solution has the following advantages or effects: the controller controls the second audio path to be turned on, the audio processing chip outputs audio data to the sound playback module, and the display chip converts the video data input from the external device into a display signal and outputs it to the display, so that the display device can display the picture and play the sound at the same time. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the structure of a conventional display device in one embodiment;

[0054] Figure 2 This is a structural block diagram of a display device in one embodiment;

[0055] Figure 3 This is a schematic diagram of the structure of a display device in one embodiment;

[0056] Figure 4 This is a flowchart illustrating a method for switching control of audio output paths in one embodiment. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0058] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0059] In this application embodiment, "display device" generally refers to a terminal device capable of outputting a specific display screen. It can be based on Internet application technology, possess an open operating system and controller, have an open application platform, and enable two-way human-computer interaction. It is a product integrating multiple functions such as audio-visual, entertainment, and data to meet diverse and personalized user needs. For example, display devices include, but are not limited to, smart TVs, mobile terminals, computers, monitors, advertising screens, wearable devices, virtual reality devices, and augmented reality (AR) devices.

[0060] This application uses AR viewing glasses as an example to illustrate the embodiments. Currently, most industry solutions for AR viewing glasses are implemented using display chip solutions, such as... Figure 1 As shown, control is achieved by using a display chip as the main chip in conjunction with an MCU (Micro Controller Unit). The display chip is responsible for converting the input DP (DisplayPort) signals (video data) from external devices such as mobile phones into MIPI (Mobile Industry Processor Interface) or LVDS (Low-Voltage Differential Signaling) signals for OLED (Organic Light-Emitting Diode) screens (display signals). The audio data synchronously follows the SBU (Side Band Use) signal in the DP protocol. Thus, the audio control signals from the display chip are directly input to the PA (Power Amplifier) ​​and then output to the speaker.

[0061] like Figure 1As shown, the display device is equipped with a Universal Serial Bus (USB) Type-C interface. External devices such as the host can connect to the display device through the Type-C interface and output audio and video data to the display device for display.

[0062] However, when external devices do not support the TYPE-C interface, such as game consoles that only have an HDMI interface, an adapter cable is needed to connect to the display device. Since the HDMI protocol does not have a separate physical channel for audio transmission, the audio data is embedded in the video data in a data island structure. The two share the TMDS data channel for transmission. The video receiving interface of the display device will synchronously receive the audio and video multiplexed data transmitted by the adapter cable. That is, there is no input of SBU1 signal and SBU2 signal (audio data). At this time, the display device can only display the picture and cannot play the sound, which seriously affects the user experience.

[0063] Therefore, a display device is proposed that can solve the compatibility and adaptation problem of traditional display devices with different external devices.

[0064] Firstly, such as Figure 2 As shown, some embodiments provide a display device, including:

[0065] A monitor is used to display images.

[0066] The audio playback module is used to play audio.

[0067] The display chip connects external devices and the monitor. It receives video and audio data from external devices, converts the video data into display signals, and outputs them to the monitor.

[0068] An audio processing chip connects to external devices and is used to receive audio data input from those devices.

[0069] The switching chip includes a first audio path connected between the display chip and the sound playback module, and a second audio path connected between the audio processing chip and the sound playback module.

[0070] The controller is connected to the display chip, audio processing chip, and switching chip respectively. The controller is configured as follows:

[0071] Receive feedback signals from the display chip and / or audio processing chip;

[0072] The on / off state of the first and second audio paths is controlled based on the feedback signal.

[0073] It should be noted that, as Figure 2As shown in the embodiment of this application, the display device is provided with a Universal Serial Bus Type-C USB TYPE-C interface as an example. External devices such as hosts can connect to the display device through the TYPE-C interface and output audio and video data to the display device for display.

[0074] Specifically, such as Figure 2 As shown, the display chip converts the video data input from the external device into a display signal and outputs it to the monitor. Both the display chip and the audio processing chip can receive the audio data output from the external device. At this time, the audio data has two paths: the audio data can be output to the sound playback module through the first audio path or the second audio path in the switching chip. When the display chip and / or the audio processing chip receive the audio data, they will output a feedback signal to the controller. The controller can obtain the reception status of the audio data by the display chip and the audio processing chip based on the feedback signal. The controller controls the on / off state of the first audio path and the second audio path based on the reception status, so that the audio data can be successfully transmitted to the sound playback module.

[0075] In the aforementioned display device, by adding an audio processing chip and a switching chip, the display chip converts the video data input from the external device into a display signal and outputs it to the display. Both the display chip and the audio processing chip can receive the audio data output from the external device. The controller controls the on / off state of the first audio path and the second audio path based on the feedback signal, so that the display chip or the audio processing chip can output the audio data to the sound playback module, thereby enabling the display device to display images and play sound simultaneously.

[0076] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0077] The controller is also configured as follows:

[0078] Upon receiving the first feedback signal and the second feedback signal, the system controls the first audio path to be turned on and the second audio path to be turned off.

[0079] Specifically, when the external device supports TYPE-C interface output, both the display chip and the audio processing chip can receive the audio data output by the external device. After receiving the audio data, the display chip outputs a first feedback signal to the controller, and the audio processing chip outputs a second feedback signal to the controller. When the controller receives the first and second feedback signals, it can ensure the synchronization of the audio data and display signal output because the audio path and video path inside the display chip have a time synchronization mechanism. The controller prioritizes controlling the first audio path to be turned on and controls the second audio path to be turned off. That is, the display chip synchronously outputs the display signal and audio data.

[0080] In this embodiment of the application, when the controller receives the first feedback signal and the second feedback signal, due to the time synchronization mechanism inside the display chip, the controller controls the first audio path to be turned on and controls the second audio path to be turned off, so that the display chip synchronously outputs display signals and audio data, ensuring the synchronization of the picture displayed by the display device and the sound played.

[0081] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0082] The controller is also configured as follows:

[0083] If a second feedback signal is received but a first feedback signal is not received, the first audio path is disconnected and the second audio path is turned on.

[0084] Specifically, when an external device supports HDMI output, the external device needs to be connected to the display device via an adapter cable. Since the HDMI protocol does not have an independent physical audio transmission channel, the audio data is embedded in the video data in a data island structure. The two share the TMDS data channel for transmission. The video receiving interface of the display chip will synchronously receive the audio and video multiplexed data transmitted by the adapter cable, while the audio receiving interface of the display chip does not receive audio data. The audio processing chip receives the audio data input by the external device through the adapter cable and outputs a second feedback signal to the controller. At this time, the controller controls the first audio path to disconnect and controls the second audio path to be turned on, and the audio processing chip outputs the audio data to the sound playback module.

[0085] In this embodiment, when the controller receives the second feedback signal but does not receive the first feedback signal, since the display chip does not receive audio data, that is, the first audio path cannot output audio data, the controller controls the first audio path to disconnect and controls the second audio path to turn on. The audio processing chip outputs the audio data to the sound playback module, and the display chip converts the video data input from the external device into a display signal and outputs it to the display, so that the display device can display the picture and play the sound at the same time.

[0086] In one embodiment, such as Figure 2 As shown, the display device also includes:

[0087] Comparator 150 is connected to display chip 110, audio processing chip 120 and controller 140 respectively. Comparator 150 is used to compare the timing of receiving the audio synchronization signal and the timing of receiving the video synchronization signal, and outputs a synchronization detection signal to controller 140. The audio synchronization signal is output by audio processing chip 120 after receiving audio data input from external device, and the video synchronization signal is output by display chip 110 after receiving audio data input from external device.

[0088] Controller 140 is also configured to:

[0089] If a second feedback signal is received but a first feedback signal is not received, the first audio path is disconnected, and the second audio path is turned on based on a synchronization detection signal.

[0090] Specifically, when audio data and display signals are output from different devices, a problem of desynchronization between the displayed image and the playing sound may occur. To solve this problem, such as... Figure 2 As shown, the display device is equipped with a comparator 150. The comparator 150 is used to compare the timing of receiving the audio synchronization signal and the timing of receiving the video synchronization signal. It can be understood that the comparator 150 is used to compare the timestamps of the two signals (audio synchronization signal and video synchronization signal) and output the video synchronization signal to the controller 140. The controller 140 controls the second audio path to be turned on based on the synchronization detection signal so that the display screen is aligned with the playback sound.

[0091] In this embodiment of the application, a comparator is added to the display device. The comparator is used to compare the timing of receiving the audio synchronization signal and the timing of receiving the video synchronization signal, and outputs a synchronization detection signal to the controller, thereby solving the problem of asynchronous playback sound and display screen.

[0092] In one embodiment, the controller is further configured to:

[0093] Based on the synchronization detection signal, the time difference between the moment when the audio synchronization signal is received and the moment when the video synchronization signal is received is determined.

[0094] Adjust the timing of the second audio path activation based on the time difference.

[0095] Specifically, the controller determines the time difference between the moment the audio synchronization signal is received and the moment the video synchronization signal is received based on the synchronization detection signal. This time difference can be used to characterize the time difference between the displayed image and the played sound. The controller can adjust the start time of the sound playback based on the time difference, that is, adjust the moment when the control second audio path is turned on, so that the played sound and the displayed image are aligned in time, and the audio and video are synchronized.

[0096] In this embodiment, the controller adjusts the timing of the second audio path activation based on the time difference between the time the audio synchronization signal is received and the time the video synchronization signal is received, so as to synchronize the playback sound and the display screen.

[0097] In one embodiment, the audio processing chip includes:

[0098] The USB interface is used to connect external devices and receive audio data input from them.

[0099] The type of audio processing chip can be set according to the actual situation. In this embodiment, the audio processing chip is an audio chip as an example for illustration.

[0100] Specifically, the audio processing chip receives audio and video multiplexed data transmitted via the adapter cable through the USB interface and then extracts the audio data from it.

[0101] In this embodiment, the USB interface has strong anti-interference capabilities, which can ensure the sound quality of audio data.

[0102] In one embodiment, the sound playback module includes:

[0103] Power amplifier, connected to switching chip;

[0104] The speaker is connected to the power amplifier and is used to play audio.

[0105] Specifically, the power amplifier receives audio data transmitted by the first audio path or the second audio path in the switching chip, amplifies the audio data, and outputs it to the speaker for playback.

[0106] In this embodiment, by placing the power amplifier and speaker in the sound playback module, losses and interference from external lines are avoided.

[0107] To facilitate understanding by those skilled in the art, the display device will be described below with reference to a specific example, such as... Figure 3 As shown, taking a display device equipped with a Universal Serial Bus Type-C USB Type-C interface as an example, external devices such as hosts can connect to the display device through the Type-C interface and output audio and video data to the display device for display; wherein, the audio processing chip is the AUDIO chip A1, and the controller is the MCU.

[0108] When the external device supports TYPE-C interface output, the video data output by the external device is received by the display chip U1 through the DP interface (video receiver interface), and the audio data is also input to the display chip U1 through the SBU channel (audio receiver interface) of the DP interface. At the same time, another path of audio data is also transmitted to the AUDIO chip A1 through the USB D+ and D- channels. Since there are two audio data paths, the UAC INT signal (second feedback signal) is fed back to the MCU. The audio path of the display chip U1 is fed back to the MCU for processing through the DP INT signal (first feedback signal). At this time, the audio path cannot be output through two paths; the audio path of the display chip (first audio path) is prioritized for output because the audio path of the AUDIO chip A1 (second audio path) would cause audio-video asynchrony. The audio and video paths of the display chip U1 have a time synchronization mechanism to ensure the synchronization of audio data and display signal output. After receiving the feedback signals from the AUDIO chip A1 and the display chip U1, the MCU uses I2S... The EN signal output control switch chip S1 switches to the I2S audio signal path (controlling the first audio path to be turned on and controlling the second audio path to be turned off), ensuring audio data output and video synchronization.

[0109] When the external device only supports HDMI output, since HDMI is not a full-featured Type-C interface, an HDMI-to-Type-C adapter cable is needed to connect it to the Type-C interface. However, with this adapter, the audio data lacks SBU1 and SBU2 signals, resulting in a missing audio path and a poor user experience (only picture, no sound). By adding an AUDIO chip A1, the display chip U1, which transmits display signals via the interface protocol, can be remedied. Since the audio path for the display chip is missing, audio data cannot be transmitted to the display chip U1. Instead, the audio data is transmitted through the AUDIO chip A1. The AUDIO chip A1's UAC INT outputs a second feedback signal to the MCU. Because the display chip U1 has no audio data input, it does not output a first feedback signal on DP INT. The MCU, based on the feedback on the INT signal, switches to the audio path I2S1 via the I2S EN signal (disconnecting the first audio path and enabling the second audio path). At this point, the audio data is transmitted through the USB port of the AUDIO chip A1. With D+ and D- path inputs, the display device can simultaneously display images and play sound.

[0110] However, when audio data is output through a separate AUDIO chip A1 and display signals are output through display chip U1, an audio-video synchronization problem arises. To solve this problem, a DP FSYNC signal (video synchronization signal) is added to display chip U1 and a UAC FSYNC signal (audio synchronization signal) is added to AUDIO chip A1. When display chip U1 and AUDIO chip A1 receive audio and video signals, they input the audio and video synchronization signals into comparator B1. Comparator B1 compares the reception time of the audio and video signals and outputs an MCU FAYNC signal (synchronization detection signal) to the MCU. After receiving the synchronization detection signal, the MCU controls the start time (the moment when the second audio path is turned on) through the I2S EN signal to align with the synchronously displayed video screen, thereby solving the problem of asynchronous playback sound and display screen.

[0111] Secondly, some embodiments also provide a method for switching control of an audio output path, applied to a display device as described above, such as... Figure 4 As shown, the method includes:

[0112] S402 receives feedback signals from the display chip and / or audio processing chip.

[0113] Specifically, the feedback signal includes a first feedback signal and a second feedback signal. The first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device. The controller receives the first feedback signal output by the display chip and / or the second feedback signal output by the audio processing chip.

[0114] S404 controls the on / off state of the first and second audio paths based on feedback signals.

[0115] Specifically, the controller controls the on / off state of the first and second audio channels according to the feedback signal received, ensuring that audio data can be transmitted to the sound playback module through the first or second audio channel, thereby enabling the display device to display images and play sound simultaneously.

[0116] In the above-mentioned audio output path switching control method, the display chip converts the video data input from the external device into a display signal and outputs it to the display. The controller controls the on / off state of the first audio path and the second audio path according to the feedback signal, so that the display chip or audio processing chip can output audio data to the sound playback module, thereby enabling the display device to display the picture and play the sound at the same time.

[0117] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0118] Controlling the on / off state of the first and second audio paths based on feedback signals includes:

[0119] Upon receiving the first feedback signal and the second feedback signal, the system controls the first audio path to be turned on and the second audio path to be turned off.

[0120] Specifically, due to the time synchronization mechanism inside the display chip, when the controller receives the first feedback signal, it controls the first audio path to be turned on and controls the second audio path to be turned off. That is, the display chip synchronously outputs display signals and audio data to ensure the synchronization of the picture displayed by the display device and the sound played.

[0121] In this embodiment, when the controller receives the first feedback signal and the second feedback signal, it prioritizes the connection of the first audio path between the display chip and the sound playback module. The display chip synchronously outputs display signals and audio data, which can ensure the synchronization of the screen displayed by the display device and the sound played.

[0122] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device.

[0123] Controlling the on / off state of the first and second audio paths based on feedback signals includes:

[0124] If a second feedback signal is received but a first feedback signal is not received, the first audio path is disconnected and the second audio path is turned on.

[0125] Specifically, when the controller receives the second feedback signal but does not receive the first feedback signal, it indicates that the display chip has not received audio data. The controller then controls the second audio path to be turned on, and the audio processing chip outputs the audio data.

[0126] In this embodiment, when the display chip does not receive audio data, the controller controls the second audio path to be turned on, the audio processing chip outputs the audio data to the sound playback module, and the display chip converts the video data input from the external device into a display signal and outputs it to the display, so that the display device can display the picture and play the sound at the same time.

[0127] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0128] Based on the same inventive concept, this application also provides an audio output path switching control device for implementing the audio output path switching control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of the one or more audio output path switching control device embodiments provided below can be found in the limitations of the audio output path switching control method described above, and will not be repeated here.

[0129] In one exemplary embodiment, an audio output path switching control device is provided, applied to a display device as described above, the device comprising:

[0130] A receiving module is used to receive feedback signals from the display chip and / or audio processing chip;

[0131] The control module is used to control the on / off state of the first audio path and the second audio path based on feedback signals.

[0132] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device; the control module is further configured to control the first audio path to be turned on and control the second audio path to be turned off when the first feedback signal and the second feedback signal are received.

[0133] In one embodiment, the feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from an external device; the control module is further configured to control the first audio path to disconnect and control the second audio path to connect when the second feedback signal is received but the first feedback signal is not received.

[0134] Each module in the aforementioned audio output path switching control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0135] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-described audio output path switching control method.

[0136] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described audio output path switching control method.

[0137] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the above-described audio output path switching control method.

[0138] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0139] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0140] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0141] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display device, characterized in that, include: A monitor is used to display images. The audio playback module is used to play audio. A display chip connects to an external device and the display. The display chip receives video and audio data input from the external device, converts the video data into a display signal, and outputs it to the display. An audio processing chip is connected to the external device, and the audio processing chip is used to receive audio data input from the external device; The switching chip includes a first audio path connected between the display chip and the sound playback module, and a second audio path connected between the audio processing chip and the sound playback module; The controller is connected to the display chip, the audio processing chip, and the switching chip, respectively, and is configured to: Receive feedback signals from the display chip and / or the audio processing chip; The on / off state of the first audio path and the second audio path is controlled based on the feedback signal.

2. The display device according to claim 1, characterized in that, The feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving the audio data input from the external device, and the second feedback signal is output by the audio processing chip after receiving the audio data input from the external device; The controller is also configured to: Upon receiving the first feedback signal and the second feedback signal, the system controls the first audio path to be turned on and the second audio path to be turned off.

3. The display device according to claim 1, characterized in that, The feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving the audio data input from the external device, and the second feedback signal is output by the audio processing chip after receiving the audio data input from the external device; The controller is also configured to: If the second feedback signal is received but the first feedback signal is not received, the first audio path is disconnected and the second audio path is turned on.

4. The display device according to claim 3, characterized in that, The display device further includes: A comparator is connected to the display chip, the audio processing chip, and the controller. The comparator is used to compare the timing of receiving the audio synchronization signal and the timing of receiving the video synchronization signal, and outputs a synchronization detection signal to the controller. The audio synchronization signal is output by the audio processing chip after receiving the audio data input from the external device, and the video synchronization signal is output by the display chip after receiving the audio data input from the external device. The controller is also configured to: If the second feedback signal is received but the first feedback signal is not received, the first audio path is disconnected, and the second audio path is turned on based on the synchronization detection signal.

5. The display device according to claim 4, characterized in that, The controller is also configured to: Based on the synchronization detection signal, the time difference between the moment the audio synchronization signal is received and the moment the video synchronization signal is received is determined; The timing of the second audio path being activated is adjusted based on the time difference.

6. The display device according to claim 1, characterized in that, The audio processing chip includes: A USB interface is provided for connecting to the external device, and the USB interface is used to receive audio data input from the external device.

7. The display device according to claim 1, characterized in that, The sound playback module includes: The power amplifier is connected to the switching chip; A speaker, connected to the power amplifier, is used to play audio.

8. A method for switching control of an audio output path, characterized in that, Applied to a display device as described in any one of claims 1 to 7, the method comprises: Receive feedback signals from the display chip and / or audio processing chip; The first audio path and the second audio path are controlled to switch on and off based on the feedback signal.

9. The audio output path switching control method according to claim 8, characterized in that, The feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from the external device. The control of the on / off state of the first audio path and the second audio path based on the feedback signal includes: Upon receiving the first feedback signal and the second feedback signal, the system controls the first audio path to be turned on and the second audio path to be turned off.

10. The audio output path switching control method according to claim 8, characterized in that, The feedback signal includes a first feedback signal and a second feedback signal, wherein the first feedback signal is output by the display chip after receiving audio data input from an external device, and the second feedback signal is output by the audio processing chip after receiving audio data input from the external device. The control of the on / off state of the first audio path and the second audio path based on the feedback signal includes: If the second feedback signal is received but the first feedback signal is not received, the first audio path is disconnected and the second audio path is turned on.

Images