CN112104950A

CN112104950A - Volume control method and display device

Info

Publication number: CN112104950A
Application number: CN202010974541.XA
Authority: CN
Inventors: 王强; 魏建德; 张辉娟
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Vidaa Netherlands International Holdings BV
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2020-12-18
Anticipated expiration: 2040-09-16
Also published as: CN112104950B

Abstract

The invention discloses a volume control method and a display device.A first audio signal gain corresponding to a first volume is calculated according to the first volume reported currently by an external audio device when the external audio device is connected with the display device; calculating a second audio signal gain corresponding to a second volume currently played by the sound player; and if the first audio signal gain and the second audio signal gain are not equal, sending a volume control instruction to the external audio equipment, wherein the volume control instruction is used for instructing the external audio equipment to gradually change the gain value from the second audio signal gain to the first audio signal gain. According to the method and the device, the volume gradually changes to the target gain when the audio output is switched among different devices, so that the volume of the audio has a smooth transition process, the volume mutation is prevented, and the listening experience of a user is improved.

Description

Volume control method and display device

Technical Field

The invention relates to the technical field of display equipment, in particular to a volume control method and display equipment.

Background

In the display device such as the smart television, not only an Audio player such as a speaker is provided, but also an external Audio device such as a smart sound can be connected through an HDMI ARC (Audio Return Channel). The ARC is used for transmitting sound signals, and the audio signals played by the display device can be output to an external audio device for playing through the HDMI supporting the ARC function.

When the display device is connected with the external audio device through the HDMI ARC, the audio output can be automatically switched from the display device to the external audio device, when the HDMI line is disconnected, the audio output is switched back to the display device, and due to the fact that the gains of the display device and the external audio device for audio signals are different, a sudden volume change phenomenon can occur when the audio output is switched, for example, the volume suddenly becomes loud or weak, and therefore the listening experience of a user is influenced.

Disclosure of Invention

The invention provides a volume control method and display equipment, which aim to solve the problem of audio volume mutation when external audio equipment is plugged and unplugged.

A first aspect provides a display device comprising:

the audio output interface is used for connecting external audio equipment;

the sound player is used for displaying audio played by the equipment;

a controller configured to perform:

when the external audio equipment is connected with the display equipment, calculating a first audio signal gain corresponding to a first volume according to the first volume reported currently by the external audio equipment;

calculating a second audio signal gain corresponding to a second volume currently played by the sound player;

and if the first audio signal gain and the second audio signal gain are not equal, sending a volume control instruction to the external audio equipment, wherein the volume control instruction is used for instructing the external audio equipment to gradually change the gain value from the second audio signal gain to the first audio signal gain.

A second aspect provides a volume control method, including:

In the first aspect and the second aspect, the display device and the external audio device are in a connected state, in this case, the external audio device is switched to output and play an audio signal, the external audio device reports a current own volume, which is named as a first volume in the present application, and after receiving the first volume, the display device converts the first volume into a corresponding first audio signal gain, and converts a corresponding second audio signal gain based on a current volume of a sound player of the display device itself, which is named as a second volume in the present application. When the first audio signal gain and the second audio signal gain are not equal, the volume mutation occurs when the audio output is switched, so that the display device sends a volume control instruction to the external audio device to control the external audio device to gradually change from the second audio signal gain to the first audio signal gain, the volume is gradually changed to the target gain when the audio output is switched among different devices, the volume of the audio has a smooth transition process, the volume mutation is prevented, and the listening experience of a user is improved.

A third aspect provides a display device comprising:

the audio output interface is used for connecting external audio equipment;

the sound player is used for displaying audio played by the equipment;

a controller configured to perform:

when the external audio equipment is disconnected with the display equipment, calculating a third audio signal gain corresponding to a third volume according to the third volume reported by the external audio equipment finally;

and if the third audio signal gain is not equal to the second audio signal gain, controlling the gain value output by the sound player to gradually change from the third audio signal gain to the second audio signal gain.

A fourth aspect provides a volume control method, comprising:

In the third aspect and the fourth aspect, the display device and the external audio device are in a disconnected state, in this case, the audio signal needs to be switched back to be output and played by the display device, the volume of the external audio device is reported last before the external audio device is completely unplugged, the volume is named as a third volume in the application, and after the display device receives the third volume, the third volume is converted into a corresponding third audio signal gain, and a second audio signal gain corresponding to the second volume is converted. When the third audio signal gain is not equal to the second audio signal gain, the volume is suddenly changed when the audio output is switched, so that the display device controls the third audio signal gain to gradually change to the second audio signal gain from the third audio signal gain, the volume is gradually changed to the target gain when the audio output is switched among different devices, the volume of the audio has a smooth transition process, the volume is prevented from suddenly changing, and the listening experience of a user is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be accessed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating an operation scenario between a display device 200 and a control apparatus 100;

fig. 2 is a block diagram illustrating a hardware configuration of the display device 200 in fig. 1;

fig. 3 is a block diagram schematically showing a hardware configuration of the control apparatus 100 in fig. 1;

fig. 4 is a schematic diagram illustrating a software configuration in the display device 200 in fig. 1;

FIG. 5 is a schematic diagram illustrating an icon control interface display of an application on display device 200;

FIG. 6 is a schematic diagram illustrating an audio output interface;

fig. 7 is a flowchart illustrating a volume control method when the display device is connected to the external audio device;

FIG. 8 is a graph illustrating the relationship of volume to audio signal gain for an external audio device;

fig. 9 is a graph schematically showing the relationship of the volume of the display device to the gain of the audio signal;

FIG. 10 is a schematic diagram illustrating an interface display during volume adjustment of an external audio device;

fig. 11 is a flowchart illustrating a volume control method when the display device is disconnected from the external audio device;

an interaction diagram of a display device with an external audio device is exemplarily shown in fig. 12.

Detailed Description

To make the objects, embodiments and advantages of the present application clearer, the following description of exemplary embodiments of the present application will clearly and completely describe the exemplary embodiments of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application, and it is to be understood that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments described herein without inventive step, are intended to be within the scope of the claims appended hereto. In addition, while the disclosure herein has been presented in terms of one or more exemplary examples, it should be appreciated that aspects of the disclosure may be implemented solely as a complete embodiment.

It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.

The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and are not necessarily intended to limit the order or sequence of any particular one, Unless otherwise indicated. It is to be understood that the terms so accessed are interchangeable under appropriate circumstances such that the terms first, second, third, etc. are, for example, capable of implementation in sequences other than those illustrated or otherwise described herein with respect to the embodiments of the application.

Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.

The term "module," as referred to herein, refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.

The term "remote control" as referred to in this application refers to a component of an electronic device, such as the display device disclosed in this application, that is typically wirelessly controllable over a relatively short distance. Generally access infrared and/or Radio Frequency (RF) signals and/or bluetooth to connect with the electronic device, and may also include WiFi, wireless USB, bluetooth, motion sensor, etc. For example: the hand-held touch remote controller replaces most of the physical built-in hard keys in the common remote control device with the user interface in the touch screen.

The term "gesture" as referred to in this application refers to a user action through a change in hand shape or hand motion to convey an intended idea, action, purpose, or result.

Fig. 1 is a schematic diagram illustrating an operation scenario between a display device and a control apparatus according to an embodiment. As shown in fig. 1, a user may operate the display device 200 through the mobile terminal 300 and the control apparatus 100.

In some embodiments, the control apparatus 100 may be a remote controller, and the communication between the remote controller and the display device includes an infrared protocol communication or a bluetooth protocol communication, and other short-distance communication methods, etc., and the display device 200 is controlled by wireless or other wired methods. The user may input a user command through a key on a remote controller, voice input, control panel input, etc. to control the display apparatus 200. Such as: the user can input a corresponding control command through a volume up/down key, a channel control key, up/down/left/right moving keys, a voice input key, a menu key, a power on/off key, etc. on the remote controller, to implement the function of controlling the display device 200.

In some embodiments, mobile terminals, tablets, computers, laptops, and other smart devices may also be accessed to control the display device 200. For example, accessing an application running on the smart device controls the display device 200. The application, through configuration, may provide the user with various controls in an intuitive User Interface (UI) on a screen associated with the smart device.

In some embodiments, the mobile terminal 300 may install a software application with the display device 200 to implement connection communication through a network communication protocol for the purpose of one-to-one control operation and data communication. Such as: the mobile terminal 300 and the display device 200 can establish a control instruction protocol, synchronize a remote control keyboard to the mobile terminal 300, and control the display device 200 by controlling a user interface on the mobile terminal 300. The audio and video content displayed on the mobile terminal 300 can also be transmitted to the display device 200, so as to realize the synchronous display function.

As also shown in fig. 1, the display apparatus 200 also performs data communication with the server 400 through various communication means. The display device 200 may be allowed to be communicatively connected through a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 400 may provide various contents and interactions to the display apparatus 200. Illustratively, the display device 200 receives software program updates, or accesses a remotely stored digital media library, by sending and receiving information, as well as Electronic Program Guide (EPG) interactions. The server 400 may be a cluster or a plurality of clusters, and may include one or more types of servers. Other web service contents such as video on demand and advertisement services are provided through the server 400.

The display device 200 may be a liquid crystal display, an OLED display, a projection display device. The particular display device type, size, resolution, etc. are not limiting, and those skilled in the art will appreciate that the display device 200 may be modified in performance and configuration as desired.

The display apparatus 200 may additionally provide an intelligent network tv function of a computer support function including, but not limited to, a network tv, an intelligent tv, an Internet Protocol Tv (IPTV), and the like, in addition to the broadcast receiving tv function.

A hardware configuration block diagram of a display device 200 according to an exemplary embodiment is exemplarily shown in fig. 2.

In some embodiments, at least one of the controller 250, the tuner demodulator 210, the communicator 220, the detector 230, the input/output interface 255, the display 275, the audio output interface 285, the memory 260, the power supply 290, the user interface 265, and the external device interface 240 is included in the display apparatus 200.

In some embodiments, a display 275 receives image signals originating from the first processor output and displays video content and images and components of the menu manipulation interface.

In some embodiments, the display 275, includes a display component for presenting a picture, and a drive component that drives the display of an image.

In some embodiments, the video content is displayed from broadcast television content, or alternatively, from various broadcast signals that may be received via wired or wireless communication protocols. Alternatively, various image contents received from the network communication protocol and sent from the network server side can be displayed.

In some embodiments, the display 275 is used to present a user-manipulated UI interface generated in the display apparatus 200 and used to control the display apparatus 200.

In some embodiments, a driver assembly for driving the display is also included, depending on the type of display 275.

In some embodiments, display 275 is a projection display and may also include a projection device and a projection screen.

In some embodiments, communicator 220 is a component for communicating with external devices or external servers according to various communication protocol types. For example: the communicator may include at least one of a WIFI module 221, a bluetooth module 222, a wired ethernet module 223, and other network communication protocol modules or near field communication protocol modules, and an infrared receiver, so that the communicator 220 may receive a control signal of the control device 100 according to the control of the controller 250, and implement the control signal as a signal type such as a WIFI signal, a bluetooth signal, and a radio frequency signal.

In some embodiments, the display apparatus 200 may establish control signal and data signal transmission and reception with the external control device 100 or the content providing apparatus through the communicator 220.

In some embodiments, the user interface 265 may be configured to receive infrared control signals from a control device 100 (e.g., an infrared remote control, etc.).

In some embodiments, the detector 230 is a signal used by the display device 200 to collect an external environment or interact with the outside.

In some embodiments, the detector 230 includes a light receiver, a sensor for collecting the intensity of ambient light, and parameters changes can be adaptively displayed by collecting the ambient light, and the like.

In some embodiments, the detector 230 may further include an image collector, such as a camera, etc., which may be configured to collect external environment scenes, collect attributes of the user or gestures interacted with the user, adaptively change display parameters, and recognize user gestures, so as to implement a function of interaction with the user.

In some embodiments, the detector 230 may also include a temperature sensor or the like, such as by sensing ambient temperature.

In some embodiments, the display apparatus 200 may adaptively adjust a display color temperature of an image. For example, the display apparatus 200 may be adjusted to display a cool tone when the temperature is in a high environment, or the display apparatus 200 may be adjusted to display a warm tone when the temperature is in a low environment.

In some embodiments, the detector 230 may also be a sound collector or the like, such as a microphone, which may be used to receive the user's voice. Illustratively, a voice signal including a control instruction of the user to control the display device 200, or to collect an ambient sound for recognizing an ambient scene type, so that the display device 200 can adaptively adapt to an ambient noise.

In some embodiments, as shown in fig. 2, the input/output interface 255 is configured to allow data transfer between the controller 250 and external other devices or other controllers 250. Such as receiving video signal data and audio signal data of an external device, or command instruction data, etc.

In some embodiments, the external device interface 240 may include, but is not limited to, the following: the interface can be any one or more of a high-definition multimedia interface (HDMI), an analog or data high-definition component input interface, a composite video input interface, a USB input interface, an RGB port and the like. The plurality of interfaces may form a composite input/output interface.

In some embodiments, as shown in fig. 2, the tuning demodulator 210 is configured to receive a broadcast television signal through a wired or wireless receiving manner, perform modulation and demodulation processing such as amplification, mixing, resonance, and the like, and demodulate an audio and video signal from a plurality of wireless or wired broadcast television signals, where the audio and video signal may include a television audio and video signal carried in a television channel frequency selected by a user and an EPG data signal.

In some embodiments, the frequency points demodulated by the tuner demodulator 210 are controlled by the controller 250, and the controller 250 can send out control signals according to user selection, so that the modem responds to the television signal frequency selected by the user and modulates and demodulates the television signal carried by the frequency.

In some embodiments, the broadcast television signal may be classified into a terrestrial broadcast signal, a cable broadcast signal, a satellite broadcast signal, an internet broadcast signal, or the like according to the broadcasting system of the television signal. Or may be classified into a digital modulation signal, an analog modulation signal, and the like according to a modulation type. Or the signals are classified into digital signals, analog signals and the like according to the types of the signals.

In some embodiments, the controller 250 and the modem 210 may be located in different separate devices, that is, the modem 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box. Therefore, the set top box outputs the television audio and video signals modulated and demodulated by the received broadcast television signals to the main body equipment, and the main body equipment receives the audio and video signals through the first input/output interface.

In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 may control the overall operation of the display apparatus 200. For example: in response to receiving a user command for selecting a UI object to be displayed on the display 275, the controller 250 may perform an operation related to the object selected by the user command.

In some embodiments, the object may be any one of selectable objects, such as a hyperlink or an icon. Operations related to the selected object, such as: displaying an operation connected to a hyperlink page, document, image, or the like, or performing an operation of a program corresponding to the icon. The user command for selecting the UI object may be a command input through various input means (e.g., a mouse, a keyboard, a touch pad, etc.) connected to the display apparatus 200 or a voice command corresponding to a voice spoken by the user.

As shown in fig. 2, the controller 250 includes at least one of a Random Access Memory 251 (RAM), a Read-Only Memory 252 (ROM), a video processor 270, an audio processor 280, other processors 253 (e.g., a Graphics Processing Unit (GPU), a Central Processing Unit 254 (CPU), a Communication Interface (Communication Interface), and a Communication Bus 256(Bus), which connects the respective components.

In some embodiments, RAM 251 is used to store temporary data for the operating system or other programs that are running.

In some embodiments, ROM252 is used to store instructions for various system boots.

In some embodiments, the ROM252 is used to store a Basic Input Output System (BIOS). The system is used for completing power-on self-test of the system, initialization of each functional module in the system, a driver of basic input/output of the system and booting an operating system.

In some embodiments, when the power-on signal is received, the display device 200 starts to power up, the CPU executes the system boot instruction in the ROM252, and copies the temporary data of the operating system stored in the memory to the RAM 251 so as to start or run the operating system. After the start of the operating system is completed, the CPU copies the temporary data of the various application programs in the memory to the RAM 251, and then, the various application programs are started or run.

In some embodiments, processor 254 is used to execute operating system and application program instructions stored in memory. And executing various application programs, data and contents according to various interactive instructions received from the outside so as to finally display and play various audio and video contents.

In some demonstrative embodiments, processor 254 may include a plurality of processors. The plurality of processors may include a main processor and one or more sub-processors. A main processor for performing some operations of the display apparatus 200 in a pre-power-up mode and/or operations of displaying a screen in a normal mode. One or more sub-processors for one operation in a standby mode or the like.

In some embodiments, the graphics processor 253 is used to generate various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The display device comprises an arithmetic unit which carries out operation by receiving various interactive instructions input by a user and displays various objects according to display attributes. And the system comprises a renderer for rendering various objects obtained based on the arithmetic unit, wherein the rendered objects are used for being displayed on a display.

In some embodiments, the video processor 270 is configured to receive an external video signal, and perform video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image synthesis, and the like according to a standard codec protocol of the input signal, so as to obtain a signal that can be displayed or played on the direct display device 200.

In some embodiments, video processor 270 includes a demultiplexing module, a video decoding module, an image synthesis module, a frame rate conversion module, a display formatting module, and the like.

The demultiplexing module is used for demultiplexing the input audio and video data stream, and if the input MPEG-2 is input, the demultiplexing module demultiplexes the input audio and video data stream into a video signal and an audio signal.

And the video decoding module is used for processing the video signal after demultiplexing, including decoding, scaling and the like.

And the image synthesis module is used for carrying out superposition mixing processing on the GUI signal input by the user or generated by the user and the video image after the zooming processing by the graphic generator so as to generate an image signal for display.

The frame rate conversion module is configured to convert an input video frame rate, such as a 60Hz frame rate into a 120Hz frame rate or a 240Hz frame rate, and the normal format is implemented in, for example, an interpolation frame mode.

The display format module is used for converting the received video output signal after the frame rate conversion, and changing the signal to conform to the signal of the display format, such as outputting an RGB data signal.

In some embodiments, the graphics processor 253 and the video processor may be integrated or separately configured, and when the graphics processor and the video processor are integrated, the graphics processor and the video processor may perform processing of graphics signals output to the display, and when the graphics processor and the video processor are separately configured, the graphics processor and the video processor may perform different functions, respectively, for example, a GPU + frc (frame Rate conversion) architecture.

In some embodiments, the audio processor 280 is configured to receive an external audio signal, decompress and decode the received audio signal according to a standard codec protocol of the input signal, and perform noise reduction, digital-to-analog conversion, and amplification processes to obtain an audio signal that can be played in a speaker.

In some embodiments, video processor 270 may comprise one or more chips. The audio processor may also comprise one or more chips.

In some embodiments, the video processor 270 and the audio processor 280 may be separate chips or may be integrated together with the controller in one or more chips.

In some embodiments, the audio output, under the control of controller 250, receives sound signals output by audio processor 280, such as: the speaker 286, and an external sound output terminal of a generating device that can output to an external device, in addition to the speaker carried by the display device 200 itself, such as: external sound interface or earphone interface, etc., and may also include a near field communication module in the communication interface, for example: and the Bluetooth module is used for outputting sound of the Bluetooth loudspeaker.

The power supply 290 supplies power to the display device 200 from the power input from the external power source under the control of the controller 250. The power supply 290 may include a built-in power supply circuit installed inside the display apparatus 200, or may be a power supply interface installed outside the display apparatus 200 to provide an external power supply in the display apparatus 200.

A user interface 265 for receiving an input signal of a user and then transmitting the received user input signal to the controller 250. The user input signal may be a remote controller signal received through an infrared receiver, and various user control signals may be received through the network communication module.

In some embodiments, the user inputs a user command through the control apparatus 100 or the mobile terminal 300, the user input interface responds to the user input through the controller 250 according to the user input, and the display device 200 responds to the user input through the controller 250.

In some embodiments, a user may enter user commands on a Graphical User Interface (GUI) displayed on the display 275, and the user input interface receives the user input commands through the Graphical User Interface (GUI). Alternatively, the user may input the user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through the sensor.

In some embodiments, a "user interface" is a media interface for interaction and information exchange between an application or operating system and a user that enables conversion between an internal form of information and a form that is acceptable to the user. A commonly used presentation form of the User Interface is a Graphical User Interface (GUI), which refers to a User Interface related to computer operations and displayed in a graphical manner. It may be an interface element such as an icon, window, control, etc. displayed in the display of the electronic device, where the control may include a visual interface element such as an icon, button, menu, tab, text box, dialog box, status bar, navigation bar, Widget, etc.

The memory 260 includes a memory storing various software modules for driving the display device 200. Such as: various software modules stored in the first memory, including: at least one of a basic module, a detection module, a communication module, a display control module, a browser module, and various service modules.

The base module is a bottom layer software module for signal communication between various hardware in the display device 200 and for sending processing and control signals to the upper layer module. The detection module is used for collecting various information from various sensors or user input interfaces, and the management module is used for performing digital-to-analog conversion and analysis management.

For example, the voice recognition module comprises a voice analysis module and a voice instruction database module. The display control module is used for controlling the display to display the image content, and can be used for playing the multimedia image content, UI interface and other information. And the communication module is used for carrying out control and data communication with external equipment. And the browser module is used for executing a module for data communication between browsing servers. And the service module is used for providing various services and modules including various application programs. Meanwhile, the memory 260 may store a visual effect map for receiving external data and user data, images of various items in various user interfaces, and a focus object, etc.

Fig. 3 exemplarily shows a block diagram of a configuration of the control apparatus 100 according to an exemplary embodiment. As shown in fig. 3, the control device 100 includes a controller 110, a communication interface 130, a user input/output interface, a memory, and a power supply.

The control apparatus 100 is configured to control the display device 200 and may receive an input operation instruction of a user and convert the operation instruction into an instruction recognizable and responsive by the display device 200, serving as an interaction intermediary between the user and the display device 200. Such as: the user operates the channel up/down key on the control device 100, and the display device 200 responds to the channel up/down operation.

In some embodiments, the control device 100 may be a smart device. Such as: the control apparatus 100 may install various applications that control the display device 200 according to user demands.

In some embodiments, as shown in fig. 1, a mobile terminal 300 or other intelligent electronic device may function similar to the control apparatus 100 after an application for manipulating the display device 200 is installed. Such as: the user may implement the function of controlling the physical keys of the apparatus 100 by installing an application, various function keys or virtual buttons of a graphical user interface available on the mobile terminal 300 or other intelligent electronic device.

The controller 110 includes a processor 112 and RAM 113 and ROM 114, a communication interface 130, and a communication bus. The controller is used for controlling the operation of the control device 100, as well as the communication cooperation among the internal components and the external and internal data processing functions.

The communication interface 130 enables communication of control signals and data signals with the display apparatus 200 under the control of the controller 110. Such as: the received user input signal is transmitted to the display apparatus 200. The communication interface 130 may include at least one of a WiFi chip 131, a bluetooth module 132, an NFC module 133, and other near field communication modules.

A user input/output interface 140, wherein the input interface includes at least one of a microphone 141, a touch pad 142, a sensor 143, keys 144, and other input interfaces. Such as: the user can realize a user instruction input function through actions such as voice, touch, gesture, pressing, and the like, and the input interface converts the received analog signal into a digital signal and converts the digital signal into a corresponding instruction signal, and sends the instruction signal to the display device 200.

The output interface includes an interface that transmits the received user instruction to the display apparatus 200. In some embodiments, the interface may be an infrared interface or a radio frequency interface. Such as: when the infrared signal interface is used, the user input instruction needs to be converted into an infrared control signal according to an infrared control protocol, and the infrared control signal is sent to the display device 200 through the infrared sending module. The following steps are repeated: when the rf signal interface is used, a user input command needs to be converted into a digital signal, and then the digital signal is modulated according to the rf control signal modulation protocol and then transmitted to the display device 200 through the rf transmitting terminal.

In some embodiments, the control device 100 includes at least one of a communication interface 130 and an input-output interface 140. The control device 100 is configured with a communication interface 130, such as: the WiFi, bluetooth, NFC, etc. modules may transmit the user input command to the display device 200 through the WiFi protocol, or the bluetooth protocol, or the NFC protocol code.

And a memory 190 for storing various operation programs, data and applications for driving and controlling the control apparatus 100 under the control of the controller. The memory 190 may store various control signal commands input by a user.

And a power supply 180 for providing operation power support for each element of the control device 100 under the control of the controller. A battery and associated control circuitry.

In some embodiments, the system may include a Kernel (Kernel), a command parser (shell), a file system, and an application program. The kernel, shell, and file system together make up the basic operating system structure that allows users to manage files, run programs, and access the system. After power-on, the kernel is started, kernel space is activated, hardware is abstracted, hardware parameters are initialized, and virtual memory, a scheduler, signals and interprocess communication (IPC) are operated and maintained. And after the kernel is started, loading the Shell and the user application program. The application program is compiled into machine code after being started, and a process is formed.

Referring to fig. 4, in some embodiments, the system is divided into four layers, which are an Application (Applications) layer (abbreviated as "Application layer"), an Application Framework (Application Framework) layer (abbreviated as "Framework layer"), an Android runtime (Android runtime) and system library layer (abbreviated as "system runtime library layer"), and a kernel layer from top to bottom.

In some embodiments, at least one application program runs in the application program layer, and the application programs can be Window (Window) programs carried by an operating system, system setting programs, clock programs, camera applications and the like; or may be an application developed by a third party developer such as a hi program, a karaoke program, a magic mirror program, or the like. In specific implementation, the application packages in the application layer are not limited to the above examples, and may actually include other application packages, which is not limited in this embodiment of the present application.

The framework layer provides an Application Programming Interface (API) and a programming framework for the application program of the application layer. The application framework layer includes a number of predefined functions. The application framework layer acts as a processing center that decides to let the applications in the application layer act. The application program can access the resources in the system and obtain the services of the system in execution through the API interface.

As shown in fig. 4, in the embodiment of the present application, the application framework layer includes a manager (Managers), a Content Provider (Content Provider), a View System (View System), and the like, where the manager includes at least one of the following modules: an Activity Manager (Activity Manager) is used for interacting with all activities running in the system; the Location Manager (Location Manager) is used for providing the system service or application with the access of the system Location service; a Package Manager (Package Manager) for retrieving various information related to an application Package currently installed on the device; a Notification Manager (Notification Manager) for controlling display and clearing of Notification messages; a Window Manager (Window Manager) is used to manage the icons, windows, toolbars, wallpapers, and desktop components on a user interface.

In some embodiments, the activity manager is to: managing the life cycle of each application program and the general navigation backspacing function, such as controlling the exit of the application program (including switching the user interface currently displayed in the display window to the system desktop), opening, backing (including switching the user interface currently displayed in the display window to the previous user interface of the user interface currently displayed), and the like.

In some embodiments, the window manager is used to manage all window processes, such as obtaining display size, determining if there is a status bar, locking the screen, intercepting the screen, controlling display window changes (e.g., zooming out, dithering, distorting, etc.) and the like.

In some embodiments, the system runtime layer provides support for the upper layer, i.e., the framework layer, and when the framework layer is accessed, the android operating system runs the C/C + + library included in the system runtime layer to implement the functions to be implemented by the framework layer.

In some embodiments, the kernel layer is a layer between hardware and software. As shown in fig. 4, the core layer includes at least one of the following drivers: audio drive, display drive, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (such as fingerprint sensor, temperature sensor, touch sensor, pressure sensor, etc.), and so on.

In some embodiments, the kernel layer further comprises a power driver module for power management.

In some embodiments, software programs and/or modules corresponding to the software architecture of fig. 4 are stored in the first memory or the second memory shown in fig. 2 or 3.

In some embodiments, taking the magic mirror application (photographing application) as an example, when the remote control receiving device receives a remote control input operation, a corresponding hardware interrupt is sent to the kernel layer. The kernel layer processes the input operation into an original input event (including information such as a value of the input operation, a timestamp of the input operation, etc.). The raw input events are stored at the kernel layer. The application program framework layer obtains an original input event from the kernel layer, identifies a control corresponding to the input event according to the current position of the focus and uses the input operation as a confirmation operation, the control corresponding to the confirmation operation is a control of a magic mirror application icon, the magic mirror application calls an interface of the application framework layer to start the magic mirror application, and then the kernel layer is called to start a camera driver, so that a static image or a video is captured through the camera.

In some embodiments, for a display device with a touch function, taking a split screen operation as an example, the display device receives an input operation (such as a split screen operation) applied to a display by a user, and the kernel layer may generate a corresponding input event according to the input operation and report the event to the application framework layer. The window mode (such as multi-window mode) corresponding to the input operation, the position and size of the window and the like are set by an activity manager of the application framework layer. And the window management of the application program framework layer draws a window according to the setting of the activity manager, then sends the drawn window data to the display driver of the kernel layer, and the display driver displays the corresponding application interface in different display areas of the display.

In some embodiments, as shown in fig. 5, the application layer containing at least one application may display a corresponding icon control in the display, such as: a live television application icon control, a Video On Demand (VOD) application icon control, a media center application icon control, an application center icon control, a game application icon control, and the like.

In some embodiments, the live television application may provide live television via different signal sources. For example, a live television application may access input providing television signals from cable television, radio broadcasts, satellite services, or other types of live television services. And, the live television application may display video of the live television signal on the display device 200.

In some embodiments, a video-on-demand application may provide video from different storage sources. Unlike live television applications, video on demand provides a video display from some storage source. For example, the video on demand may come from a server side of the cloud storage, from a local hard disk storage containing stored video programs.

In some embodiments, the media center application may provide various applications for multimedia content playback. For example, a media center, which may be other than live television or video on demand, may provide services that a user may access to various images or audio through a media center application.

In some embodiments, an application center may provide storage for various applications. The application may be a game, an application, or some other application associated with a computer system or other device that may be run on the smart television. The application center may obtain these applications from different sources, store them in local storage, and then be operable on the display device 200.

The above embodiments describe the hardware/software architecture and functional implementation of the display device. In some application scenarios, the display device may output and play audio signals through a built-in sound player (such as the speaker 286) itself, or may be connected to an external audio device through the HDMI ARC, where the external audio device includes, but is not limited to, a smart audio, an external speaker, and the like, and the external audio device described in this application supports the ARC function and belongs to the external ARC device.

As shown in fig. 6, an Audio Output (Audio Output) Interface is provided in the display device, and the Interface shows the paths available for Audio Output and playing, such as TV Speaker, ARC, and SPDIF (Sony/Philips Digital Interface). When the display equipment is connected with external audio equipment through HDMI ARC, an audio output option in the interface is automatically jumped to ARC from TV Speaker, namely the ARC item is selected, and an audio signal is output and played by the external audio equipment; when the external audio device is switched off, the audio output option in the interface is restored to the TV Speaker by ARC, namely ARC is unchecked, TV Speaker is unchecked, and the audio signal is output and played by the sound player carried by the display device.

Because when external audio equipment is plugged, switching between audio output equipment is involved, and different audio output equipment will lead to the problem of volume sudden change to audio signal's gain difference, and the user can hear the sound and grow suddenly or diminish, leads to user experience poor. An effective solution is given for this application, mainly from two perspectives: one is that when the display device is connected with the external audio device, the audio output is switched from the display device to the external audio device, referring to the volume control of the scheme (A); the other is that when the display device is disconnected from the external audio device, the audio output is switched back to the display device by the external audio device, referring to the volume control of scheme (B).

As shown in fig. 7, the volume control method provided by the scheme (a) is configured to be executed by the controller 250 of the display device, that is, the controller 250 is an execution subject of the method, and the method includes the following program steps:

when the external audio device is connected to the display device, in step S101, a first audio signal gain corresponding to a first volume is calculated according to the first volume currently reported by the external audio device.

When the display equipment is connected with the external audio equipment, the external audio equipment reports the current volume of the external audio equipment to the display equipment in real time, and the external audio equipment is named as first volume for convenience of distinguishing, so that the volume of the external audio equipment is controlled by the display equipment conveniently. The adjustable range of the volume of the display device and the external audio device is generally 0-100, and the fluctuation change of the actual audio signal gain corresponding to each change 1 of the volume value of the display device and the external audio device is different, so that the sudden change of the volume cannot be eliminated by directly comparing the volume values of the display device and the external audio device, but the sudden change of the volume needs to be converted into the audio signal gain corresponding to the volume value, and the accuracy and the reliability of volume control are ensured.

For external audio equipment of different brands and models, the adjustable range of the audio signal gain is different, for example, the adjustable range of the gain of Yamaha is-80- +16.5dB, the adjustable range of the gain of Denon is-79.5- +18dB, the adjustable range of the gain of Onkyo is-81.5- +18dB, and the adjustable range of the gain does not affect the adaptability of the application.

In some embodiments, taking an external audio device of Yamaha RX-V773 model as an example, fig. 8 is a graph of a relationship between a sound volume and an audio signal gain, a horizontal axis represents a sound volume value, a sound volume adjustable range is 0 to 100, a vertical axis represents a gain value, a gain adjustable range is-80 to +16.5dB, and a curve relationship of fig. 8 changes approximately linearly. The corresponding relationship between the volume value and the gain value can be obtained through the relationship curve of the volume and the gain of the audio signal, i.e. the gain y of the audio signal externally displayed in fig. 8_ampThe fitted curve to the volume value x is y_ampIt can be seen that, according to the relationship between the volume and the audio signal gain, the first audio signal gain corresponding to the first volume can be determined, so that the conversion between the volume value and the gain is completed.

In some embodiments, curves and corresponding relations of the volume of the external audio device and the gain of the audio signal may be preset in the display device, for example, when the display device is connected to an external audio device D, information such as a model and a brand of the external audio device D may be recognized, and then after receiving the first volume reported by the external audio device D, the corresponding relation of the volume of the external audio device D and the gain of the audio signal is called to convert the first volume of the external audio device D into the corresponding first gain of the audio signal.

Step S102, calculating a second audio signal gain corresponding to a second volume currently played by the sound player.

The volume-audio signal gain correspondence of the display device itself is generally fixed, and generally relates to the hardware configuration and performance of the display device itself. Drawing (A)9, a relation curve of the volume of the display device to the gain of the audio signal is shown, the adjustable range of the volume is 0-100, the adjustable range of the gain is-120- +0dB, and the gain y of the audio signal of the display device_tvThe fitted curve to the volume value x is y_tv＝0.0002x³-0.0433x²+2.7066 x-60. The display device stores the curve and the corresponding relation of the volume and the audio signal gain in advance, namely the corresponding second audio signal gain can be converted according to the current second volume.

Step S103, comparing whether the first audio signal gain and the second audio signal gain are equal, if the two gain values are equal, the volume mutation does not occur, the volume control can be finished, and the audio output is directly switched to external audio equipment; otherwise, if the two gain values are not equal, the volume abrupt change occurs, and step S104 is executed.

Step S104, sending a volume control instruction to the external audio equipment, wherein the volume control instruction is used for instructing the external audio equipment to gradually change the gain value from the second audio signal gain to the first audio signal gain.

The controller 250 (which may be equivalent to an SOC chip) of the display device generally performs communication interaction with the external ARC device through CEC commands, and CEC may control all devices connected to the HDMI interface to realize interaction between the display device and the peripheral interconnection device.

That is, the volume control command is sent to the external audio device in the form of a CEC command, and when the audio signal gain of the external audio device is adjusted by the CEC command, the control form is embodied as a trigger control of the volume adjustment key. In some embodiments, the first audio signal gain y is calculated_amp1And a second audio signal gain y_tvFirst gain difference Δ y therebetween₁According to the first gain difference value Deltay₁And a gain adjustment step size P_stepIf the number n of key presses of the external audio equipment is calculated, n is equal to delta y₁/P_step＝|y_tv-y_amp1|/P_stepWherein the gain is adjusted by a step size P_stepThe variation of the gain value for a single activation of the volume adjustment key is typically 0.5 dB. By pressing a keyThe number n may be determined as the number of gradual changes to the target gain value (i.e., the gain of the first audio signal), i.e., the gain of the second audio signal needs to be gradually changed n times, so that the volume of the audio signal does not suddenly change to the target gain value, but gradually and smoothly transitions to the target gain value, thereby solving the problem of sudden changes in volume and improving user experience.

In some embodiments, the volume adjustment keys generally include an up key (volume +) and a down key (volume-), and then, when adjusting the volume, it is determined whether the up key or the down key is activated, in addition to the number of times the key is activated.

In some embodiments, if the first audio signal gain is smaller than the second audio signal gain, which indicates that the volume gradually changes in a decreasing trend and needs to be gradually decreased to the volume corresponding to the target gain value, a first indication message may be generated, where the first indication message is used to indicate that a down key of the volume adjustment keys needs to be triggered, and then a volume control instruction is generated according to the first indication message and the number of key presses n, where the volume control instruction indicates that the down key needs to be triggered n times, and the gain value of the external audio device may be gradually decreased from the second audio signal to the first audio signal gain.

In some embodiments, if the first audio signal gain is greater than the second audio signal gain, which indicates that the volume gradually changes in an increasing trend and needs to gradually increase to the volume corresponding to the target gain value, second indication information may be generated, where the second indication information is used to indicate that an up key of the volume adjustment keys needs to be triggered, and then a volume control instruction is generated according to the second indication information and the number of key presses n, where the volume control instruction indicates that the up key needs to be triggered n times, and the gain value of the external audio device may be gradually increased from the second audio signal to the first audio signal gain.

Referring to the interface diagram of fig. 10, when the external audio device adjusts the Volume, a certain change may be presented on the current display interface of the display, for example, the gain of the first audio signal is greater than the gain of the second audio signal, and the gain value needs to be gradually increased according to the gain adjustment step size until the target gain value is reached, at this time, dynamic gain change information may be displayed at a specified position on the interface, for example, at the bottom of the interface, where the dynamic gain change information is in a form of "Volume +2.5 dB", so that the user can visually see the dynamic adjustment of the gain of the audio signal when the audio output switches devices. Meanwhile, the volume value corresponding to the gain value gradually changed each time in the volume adjustment process can be displayed at other designated positions, for example, in fig. 10, when the gain value is increased by 2.5dB, the corresponding actual volume value is displayed as 79 at the upper right corner of the interface, and a volume control can be set at the same time, the volume control can be presented to include a volume scale and a volume positioning point, the volume value can be marked below the volume scale, wherein the volume scale continuously represents the volume value of 0-100 from bottom to top, the position of the volume positioning point on the volume scale indicates the current volume value, and in the volume gradual change process, the volume control is presented to slide upwards or downwards on the volume scale. After the gain is adjusted to the target gain value, in order not to affect the viewing effect of the interface, the contents such as the automatic hidden gain dynamic change information and the volume control can be set. The hiding condition is not limited, for example, a time condition may be set, and the hiding is automatically performed when the display duration of the gain dynamic change information and the volume control reaches a preset time.

In the scheme (a), the display device and the external audio device are in a connected state, and in this case, the external audio device is switched to output and play an audio signal, the external audio device reports the current volume of the external audio device itself, which is named as a first volume in the present application, and after receiving the first volume, the display device converts the first volume into a corresponding first audio signal gain, and converts a corresponding second audio signal gain based on the current volume of a sound player of the display device itself, which is named as a second volume in the present application. When the first audio signal gain and the second audio signal gain are not equal, the volume mutation occurs when the audio output is switched, so that the display device sends a volume control instruction to the external audio device to control the external audio device to gradually change from the second audio signal gain to the first audio signal gain, the volume is gradually changed to the target gain when the audio output is switched among different devices, the volume of the audio has a smooth transition process, the volume mutation is prevented, and the listening experience of a user is improved.

As shown in fig. 11, the volume control method provided by the scheme (B) is configured to be executed by the controller 250 of the display device, that is, the controller 250 is an execution subject of the method, and the method includes the following program steps:

when the external audio device is disconnected from the display device, in step S201, a third audio signal gain corresponding to a third volume is calculated according to the last reported third volume of the external audio device.

When the user unplugs or closes the external audio equipment, the external audio equipment and the display equipment are changed into a disconnected state, at this time, the audio signal output and playing by the display equipment needs to be switched back, the volume value finally reported to the display equipment before the external audio equipment is disconnected is named as a third volume, and the third audio signal gain is converted by utilizing the corresponding relation between the volume of the external audio equipment and the audio signal gain according to the mode.

Step S202, a second audio signal gain corresponding to a second volume currently played by the audio player is calculated.

Step S203 compares whether the third audio signal gain and the second audio signal gain are equal. If the two gain values are equal, the volume control can be finished without volume mutation, and the audio is directly switched to be output and played by the display equipment; otherwise, if the two gain values are not equal, the volume abrupt change occurs, and step S204 is executed.

In step S204, the gain value output by the audio player is controlled to gradually change from the third audio signal gain to the second audio signal gain.

In step S104, the volume of the external audio device is controlled by the number of times n of pressing the button and the indication information indicating the trend of volume adjustment through the CEC-type volume control instruction, and in step S204, since the external audio device is cut off, the volume change only needs to be directly controlled by the display device itself, in this case, the volume control is not reflected as triggering the volume adjustment key any more, but the gain change amount is mapped as the volume change amount, that is, in the third audio signal gain, the volume is adjusted according to the volume change amount, and the volume can be finally adjusted to the second audio signal gain.

In some embodiments, a third audio signal gain y is calculated_amp3And a second audio signal gain y_tvSecond gain difference Δ y therebetween₂Then, according to the preset corresponding relation/curve of the volume of the display equipment and the gain of the audio signal, a second gain difference value delta y is calculated₂The corresponding volume adjustment Δ V also determines the volume value that needs to be adjusted when adjusting from the third audio signal gain to the second audio signal gain.

In some embodiments, if the third audio signal gains y_amp3Greater than the second audio signal gain y_tvThen adjust the step size V by the volume_stepGradually decreasing the volume adjustment amount Δ V, for example, the volume adjustment amount Δ V is 3, and the volume adjustment step size V_stepAt 1, the current volume of the display device is 75, the volume is gradually changed to 74, 73 and 72, and finally the volume is reduced to 72, namely, the volume is gradually reduced by 3 units.

In some embodiments, if the third audio signal gains y_amp3Less than the second audio signal gain y_tvThen adjust the step size V by the volume_stepGradually increasing the volume adjustment amount Δ V, for example, the volume adjustment amount Δ V is 4, and the volume adjustment step size V_stepAt 1, the current volume of the display device is 75, the volume is gradually changed to 76, 77, 78 and 79, and finally the volume is increased to 79, namely, the volume is gradually increased by 4 units.

In the scheme (B), the display device and the external audio device are in a disconnected state, and in this case, the display device needs to switch back to output and play the audio signal, and the volume of the external audio device is reported last before the external audio device is completely unplugged. When the third audio signal gain is not equal to the second audio signal gain, the volume is suddenly changed when the audio output is switched, so that the display device controls the third audio signal gain to gradually change to the second audio signal gain from the third audio signal gain, the volume is gradually changed to the target gain when the audio output is switched among different devices, the volume of the audio has a smooth transition process, the volume is prevented from suddenly changing, and the listening experience of a user is improved.

CEC-related instructions are defined in the HDMI protocol for realizing communication interaction between the display device and the external audio device. In a more detailed implementation, fig. 12 shows an interaction logic of the display device and the external audio device, a user may adjust a playing volume of the external audio device through a remote controller or a volume adjustment key on the local display device, the user may press the volume adjustment key (volume + /) for a short time or a long time during operation, the volume may continuously change when the user presses the volume adjustment key for a long time, and the user changes a unit volume when pressing the volume adjustment key for a short time.

In some embodiments, the interaction process when the user presses the volume adjustment key for a short time is as follows:

step 1: a User presses a volume adjusting key, the display device sends a User Control Pressed instruction (0x44) to an external audio device, the 0x44 instruction is Opcode and is used for indicating that the User presses the volume adjusting key, the instruction can carry 1 parameter 0x41 or 0x42, the parameter 0x41 indicates that the User presses a volume plus key (volume +), and the parameter 0x42 indicates that the User presses a volume minus key (volume-); the external audio device increases or decreases a gain adjustment step size P in response to a User Control Pressed command_stepA corresponding gain value;

step 2: the method comprises the steps that a User releases a volume adjusting key, a display device sends a User Control Released instruction (0x45) and a Give Audio Status instruction (0x71) to an external Audio device, the 0x45 instruction is used for indicating that the User releases the volume adjusting key, the 0x71 instruction indicates that the current Audio Status (Audio state) of the external Audio device is obtained, and the Audio Status comprises a volume value and a mute state of the external Audio device;

step 3: the method comprises the steps that an external Audio device feeds back a Report Audio Status instruction (0x7A) to a display device, the instruction carries 1 parameter, the most significant bit7 of the parameter represents a mute state, and bits 0-6 are used for reporting the current volume value (namely the first volume) of the external Audio device, wherein the current volume value is obtained by mapping the current Audio signal gain of the external Audio device into a range of 0-100; after the display device analyzes the Report Audio Status instruction, the first volume reported by the external Audio device can be obtained, and the first volume of the external Audio device can be displayed on the television interface.

In some embodiments, when the User presses the volume adjustment key for a long time, the external Audio device recognizes that the external Audio device is a repeat key, so as to continuously respond and increase or decrease the gain of the Audio signal, until receiving a User Control Released instruction (0x45), the external Audio device stops increasing or decreasing the gain of the Audio signal, and feeds back a Report Audio Status instruction (0x7A) to the display device, wherein the volume values corresponding to the gains of the Audio signal finally reached by releasing the long time are reported by bits 0 to 6 in the instruction.

It should be noted that, regarding a conventional communication interaction manner between the display device and the external audio device interconnected through the HDMI ARC, reference may be made to related applications and descriptions in the prior art, and details of this embodiment are not repeated. On the basis of conventional communication interaction, the volume control method provided by the application can solve the problem of volume mutation caused by switching of the audio output device when the external audio device is connected or switched.

Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. In a specific implementation, the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, and when the computer storage medium is located in a display device, the program may include all program steps related to the volume control method configured by the controller 250. The computer storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).

In this specification, the same and similar parts between the display device embodiment and the method embodiment may be referred to each other, and related contents are not described again.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. The specification and examples are to be regarded in an illustrative manner only and are not intended to limit the scope of the present invention. With a true scope and spirit of the invention being indicated by the following claims.

Claims

1. A display device, comprising:

the audio output interface is used for connecting external audio equipment;

the sound player is used for displaying audio played by the equipment;

a controller configured to perform:

2. The display device according to claim 1, wherein the controller is further configured to perform:

calculating a first gain difference between the first audio signal gain and the second audio signal gain;

calculating the key pressing times of the external audio equipment according to the first gain difference and the gain adjustment step length; the gain adjustment step length is the change quantity of the gain value when the volume adjustment key is triggered once;

and generating the volume control instruction according to the key pressing times.

3. The display device according to claim 2, wherein the controller is further configured to perform:

if the first audio signal gain is smaller than the second audio signal gain, generating first indication information, wherein the first indication information is used for indicating to trigger a sound reduction key in a volume adjusting key;

and generating the volume control instruction according to the first indication information and the key pressing times.

4. The display device according to claim 2, wherein the controller is further configured to perform:

if the first audio signal gain is larger than the second audio signal gain, generating second indication information, wherein the second indication information is used for indicating to trigger an upwarping key in a volume adjusting key;

and generating the volume control instruction according to the second indication information and the key press times.

5. The display device according to claim 1, wherein the controller is further configured to perform:

calculating a second audio signal gain corresponding to a second volume currently played by the sound player according to a preset corresponding relation between the volume of the display equipment and the audio signal gain;

and calculating a first audio signal gain corresponding to the first volume according to a preset corresponding relation between the volume of the external audio equipment and the audio signal gain.

6. A display device, comprising:

the audio output interface is used for connecting external audio equipment;

the sound player is used for displaying audio played by the equipment;

a controller configured to perform:

7. The display device according to claim 6, wherein the controller is further configured to perform:

calculating a second gain difference between the third audio signal gain and the second audio signal gain;

calculating the volume adjustment amount corresponding to the second gain difference value according to the preset corresponding relation between the volume of the display equipment and the gain of the audio signal;

if the third audio signal gain is greater than the second audio signal gain, gradually decrementing the volume adjustment by a volume adjustment step size;

incrementally increasing the volume adjustment in volume adjustment steps if the third audio signal gain is less than the second audio signal gain.

8. The display device according to claim 6, wherein the controller is further configured to perform:

and calculating a third audio signal gain corresponding to the third volume according to a preset corresponding relation between the volume of the external audio equipment and the audio signal gain.

9. A volume control method in a display device, comprising:

10. A volume control method in a display device, comprising: