CN112073663A - Audio gain adjusting method, video chatting method and display equipment - Google Patents
Audio gain adjusting method, video chatting method and display equipment Download PDFInfo
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Abstract
The audio gain adjusting method, the video chatting method and the display device are particularly suitable for a social television, and the method comprises the following steps: the auxiliary chip transmits the video image subjected to automatic zooming processing to a main chip and transmits focal length information corresponding to the video image to the main chip; the main chip receives the video image and the focal length information; the main chip acquires microphone gain according to the focal length information and performs gain processing on audio corresponding to the video image according to the microphone gain; and the main chip synchronizes the audio subjected to gain processing with the video image and transmits the synchronized audio and video to a display frame of an opposite terminal. According to the technical scheme, the method and the device have the advantages that the focal length information is utilized to process the video image in the video chat, and the microphone gain is determined, so that the gain processing of audio data based on the distance between a person and the microphone in the video chat process is realized, and the stability of sound in the video chat process is ensured.
Description
Technical Field
The present application relates to the technical field of display devices, and in particular, to an audio gain adjustment method, a video chat method, and a display device.
Background
With the development of the smart television, the smart television is gradually provided with a camera for voice and video chat, so that the function of watching and chatting of the television is realized. Generally, the smart television is fixedly installed in a relatively large space such as a living room, and a certain distance is usually kept between the smart television and the living room when people use the smart television; and when people use the smart television to chat in voice and video, people often move along with the smart television. If a person who uses the smart television for voice and video chat moves along with the smart television, unstable sound can occur, and if the voice and video chat occurs, the sound of the person at the opposite end is suddenly changed, the sound is unstable, and sometimes the voice and video chat is even influenced.
However, in the current application scenario of voice and video chat, the voice quality of the mobile phone or other handheld mobile devices is guaranteed, and most of the mobile phone or other handheld mobile devices perform noise reduction or gain processing on the voice. However, the voice and video chat applied to the handheld mobile devices such as the mobile phone belongs to near-field voice and video chat, so the noise reduction processing or gain processing of the voice on the handheld mobile devices such as the mobile phone is processing of determining the voice in the distance scene. However, when the smart television is used for voice-video chat, which belongs to far-field voice-video chat, the distance between the sound producer and the microphone on the television is usually relatively large and may vary with the movement of the sound producer. Therefore, the technology for processing the sound in the voice and audio video chat by the handheld mobile devices such as the mobile phone cannot meet the requirement of sound stability in the use scene of the voice and video chat in the smart television.
Disclosure of Invention
The application provides an audio gain adjusting method, a video chatting method and a display device, which can ensure the stability of sound in video chatting.
In a first aspect, the present application provides an audio gain adjustment method, including:
acquiring focal length information corresponding to a current image in video chat;
acquiring microphone gain according to the focal length information; and adjusting the audio frequency received by the microphone according to the acquired microphone gain value.
In a second aspect, the present application provides a video chat method, including:
the auxiliary chip transmits the video image subjected to automatic zooming processing to a main chip and transmits focal length information corresponding to the video image to the main chip;
the main chip receives the video image and the focal length information;
the main chip acquires microphone gain according to the focal length information and performs gain processing on the audio corresponding to the video image according to the microphone gain so as to reduce the fluctuation of the audio volume locally sent to the opposite terminal;
and the main chip synchronizes the audio subjected to gain processing with the video image and transmits the synchronized audio and video to a display frame of an opposite terminal.
In a third aspect, the present application provides a display device comprising:
a display configured to display a user interface;
a controller communicatively coupled to the display, the controller configured to execute a presentation user interface:
a main chip connected with the display and an auxiliary chip connected with the main chip through Net, serial port and CEC, wherein the main chip is configured to execute any one of the above audio gain adjusting methods; or,
the main chip and the auxiliary chip are configured to cooperatively execute any one of the video chat methods.
The application provides an audio gain adjustment method, a video chat method and a display device, which comprises the following steps: the method comprises the steps of obtaining focal length information of a current video image in video chatting, obtaining microphone gain according to the focal length information, and adjusting audio received by a microphone according to the obtained microphone gain value. In the process of video chatting with variable-focus processing through the smart television, focal length information is obtained according to automatic zoom processing of video images, corresponding microphone gain is obtained according to the focal length information, and gain processing is carried out on current audio data in the video chatting through the obtained microphone gain. In the method, the device and the system, the focal length information is utilized to process the video image in the video chat, and the microphone gain is determined, so that the audio data is subjected to gain processing based on the distance between a person and the microphone in the video chat process, the fluctuation of the sound volume locally sent to the opposite terminal caused by the change of the distance between the person and the television is reduced, the sound volume locally sent to the opposite terminal is basically unchanged, and the stability of the sound in the video chat process is ensured.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic diagram illustrating an operation scenario between a display device and a control apparatus according to an embodiment;
fig. 2 is a block diagram exemplarily showing a hardware configuration of the control apparatus 100 according to the embodiment;
fig. 3 is a block diagram exemplarily showing a hardware configuration of the display device 200 according to the embodiment;
a block diagram of the hardware architecture of the display device 200 according to fig. 3 is exemplarily shown in fig. 4;
fig. 5 is a diagram exemplarily showing a functional configuration of the display device 200 according to the embodiment;
fig. 6a schematically shows a software configuration in the display device 200 according to an embodiment;
fig. 6b schematically shows a configuration of an application in the display device 200 according to an embodiment;
fig. 7 schematically illustrates a user interface in the display device 200 according to an embodiment;
fig. 8 is a schematic flow diagram illustrating an audio gain adjustment method according to an embodiment;
fig. 9 is a diagram exemplarily illustrating a calculation principle of focus information according to an embodiment;
a flow diagram of a video chat method according to an embodiment is illustrated in fig. 10.
Detailed Description
To make the objects, technical solutions and advantages of the exemplary embodiments of the present application clearer, the technical solutions in the exemplary embodiments of the present application will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present application, and it is obvious that the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.
The present application relates to a display terminal including at least two system-on-chip, and for ease of understanding, a display terminal of a multi-chip structure is described herein.
For the convenience of users, various external device interfaces are usually provided on the display device to facilitate connection of different peripheral devices or cables to implement corresponding functions. When a high-definition camera is connected to an interface of the display device, if a hardware system of the display device does not have a hardware interface of a high-pixel camera receiving the source code, data received by the camera cannot be displayed on a display screen of the display device.
Furthermore, due to the hardware structure, the hardware system of the conventional display device only supports one path of hard decoding resources, and usually only supports video decoding with a resolution of 4K at most, so when a user wants to perform video chat while watching a network television, the user needs to use the hard decoding resources (usually GPU in the hardware system) to decode the network video without reducing the definition of the network video screen, and in this case, the user can only process the video chat screen by using a general-purpose processor (e.g. CPU) in the hardware system to perform soft decoding on the video.
The soft decoding is adopted to process the video chat picture, so that the data processing burden of a CPU (central processing unit) can be greatly increased, and when the data processing burden of the CPU is too heavy, the problem of picture blocking or unsmooth flow can occur. Further, due to the data processing capability of the CPU, when the CPU performs soft decoding on the video chat screen, multi-channel video calls cannot be generally implemented, and when a user wants to perform video chat with multiple other users in the same chat scene, access is blocked.
In view of the above aspects, to overcome the above drawbacks, the present application discloses a dual hardware system architecture to implement multiple channels of video chat data (at least one channel of local video).
The concept to which the present application relates will be first explained below with reference to the drawings. It should be noted that the following descriptions of the concepts are only for the purpose of facilitating understanding of the contents of the present application, and do not represent limitations on the scope of the present application.
The term "module," as used in various embodiments of the present application, may refer 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 used in the embodiments of the present application refers to a component of an electronic device (such as the display device disclosed in the present application) that is capable of wirelessly controlling the electronic device, typically over a short distance. The component may typically be connected to the electronic device using infrared and/or Radio Frequency (RF) signals and/or bluetooth, and may also include functional modules such as WiFi, wireless USB, bluetooth, motion sensors, 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 used in the embodiments of the present application refers to a user behavior used to express an intended idea, action, purpose, or result through a change in hand shape or an action such as hand movement.
The term "hardware system" used in the embodiments of the present application may refer to a physical component having computing, controlling, storing, inputting and outputting functions, which is formed by a mechanical, optical, electrical and magnetic device such as an Integrated Circuit (IC), a Printed Circuit Board (PCB) and the like. In various embodiments of the present application, a hardware system may also be referred to as a motherboard (or chip).
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 apparatus 200 through the control device 100.
The control device 100 may be a remote controller 100A, which can communicate with the display device 200 through an infrared protocol communication, a bluetooth protocol communication, a ZigBee (ZigBee) protocol communication, or other short-range communication, and is used to control the display device 200 in a wireless or other wired manner. The user may input a user instruction 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.
The control apparatus 100 may also be a smart device, such as a mobile terminal 100B, a tablet computer, a notebook computer, etc., which may communicate with the display device 200 through a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), or other networks, and implement control of the display device 200 through an application program corresponding to the display device 200.
For example, the mobile terminal 100B and the display device 200 may each have a software application installed thereon, so that connection communication between the two can be realized through a network communication protocol, and the purpose of one-to-one control operation and data communication can be further realized. Such as: a control instruction protocol can be established between the mobile terminal 100B and the display device 200, a remote control keyboard is synchronized to the mobile terminal 100B, and the function of controlling the display device 200 is realized by controlling a user interface on the mobile terminal 100B; the audio and video content displayed on the mobile terminal 100B may also be transmitted to the display device 200, so as to implement a synchronous display function.
As shown in fig. 1, the display apparatus 200 may also perform data communication with the server 300 through various communication means. In various embodiments of the present application, the display device 200 may be allowed to be communicatively coupled to the server 300 via a local area network, a wireless local area network, or other network. The server 300 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, and Electronic Program Guide (EPG) interactions. The servers 300 may be a group or groups, and may be one or more types of servers. Other web service contents such as a video on demand and an advertisement service are provided through the server 300.
The display device 200 may be, for example, a liquid crystal display, an oled (organic Light Emitting diode) display, or a projection display device; on the other hand, the display device can be a display system consisting of an intelligent television or a display and a set-top box. The specific 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 that provides a computer support function in addition to the broadcast receiving tv function. Examples include a web tv, a smart tv, an Internet Protocol Tv (IPTV), and the like. In some embodiments, the display device may not have a broadcast receiving television function.
As shown in fig. 1, the display device may be connected or provided with a camera, and is configured to present a picture taken by the camera on a display interface of the display device or other display devices, so as to implement interactive chat between users. Specifically, the picture shot by the camera can be displayed on the display device in a full screen mode, a half screen mode or any optional area.
As an optional connection mode, the camera is connected with the display rear shell through the connecting plate, is fixedly installed in the middle of the upper side of the display rear shell, and can be fixedly installed at any position of the display rear shell as an installable mode, so that an image acquisition area is ensured not to be shielded by the rear shell, for example, the display orientation of the image acquisition area is the same as that of the display equipment.
As another alternative connection mode, the camera is connected to the display rear shell through a connection board or other conceivable connector, the camera is capable of lifting, the connector is provided with a lifting motor, when a user wants to use the camera or an application program wants to use the camera, the camera is lifted out of the display, and when the camera is not needed, the camera can be embedded in the rear shell to protect the camera from being damaged.
As an embodiment, the camera adopted in the present application may have 1600 ten thousand pixels, so as to achieve the purpose of ultra high definition display. In actual use, cameras higher or lower than 1600 ten thousand pixels may also be used.
After the camera is installed on the display device, the contents displayed by different application scenes of the display device can be fused in various different modes, so that the function which cannot be realized by the traditional display device is achieved.
Illustratively, a user may conduct a video chat with at least one other user while watching a video program. The presentation of the video program may be as a background frame over which a window for video chat is displayed. The function is called 'chat while watching'.
Optionally, in a scene of "chat while watching", at least one video chat is performed across terminals while watching a live video or a network video.
In another example, a user can conduct a video chat with at least one other user while entering the educational application for learning. For example, a student may interact remotely with a teacher while learning content in an educational application. Vividly, this function can be called "chatting while learning".
In another example, a user conducts a video chat with a player entering a card game while playing the game. For example, a player may enable remote interaction with other players when entering a gaming application to participate in a game. Figuratively, this function may be referred to as "watch while playing".
Optionally, the game scene is fused with the video picture, the portrait in the video picture is scratched and displayed in the game picture, and the user experience is improved.
Optionally, in the motion sensing game (such as ball hitting, boxing, running and dancing), the human posture and motion, limb detection and tracking and human skeleton key point data detection are obtained through the camera, and then the human posture and motion, the limb detection and tracking and the human skeleton key point data detection are fused with the animation in the game, so that the game of scenes such as sports and dancing is realized.
In another example, a user may interact with at least one other user in a karaoke application in video and voice. Vividly, this function can be called "sing while watching". Preferably, when at least one user enters the application in a chat scenario, a plurality of users can jointly complete recording of a song.
In another example, a user may turn on a camera locally to take pictures and videos, figurative, which may be referred to as "looking into the mirror".
In other examples, more or less functionality may be added. The function of the display device is not particularly limited in the present application.
Fig. 2 is a block diagram schematically showing the configuration of the control apparatus 100 according to the exemplary embodiment. As shown in fig. 2, the control device 100 includes a controller 110, a communicator 130, a user input/output interface 140, a memory 190, and a power supply 180.
The control apparatus 100 is configured to control the display device 200, and to receive an input operation instruction from a user, and convert the operation instruction into an instruction recognizable and responsive by the display device 200, and to mediate interaction 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, the mobile terminal 100B or other intelligent electronic device may function similar to the control apparatus 100 after installing an application for manipulating the display device 200. Such as: the user may implement the functions of controlling the physical keys of the apparatus 100 by installing applications, various function keys or virtual buttons of a graphical user interface available on the mobile terminal 100B or other intelligent electronic devices.
The controller 110 includes a processor 112, a RAM113 and a ROM114, a communication interface, and a communication bus. The controller 110 is used to control the operation of the control device 100, as well as the internal components for communication and coordination and external and internal data processing functions.
The communicator 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 communicator 130 may include at least one of a WIFI module 131, a bluetooth module 132, an NFC module 133, and the like.
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, a key 144, and the like. 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, it 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 communicator 130 and an output interface. The communicator 130 is configured in the control device 100, such as: the modules of WIFI, bluetooth, NFC, etc. may send 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 110. The memory 190 may store various control signal commands input by a user.
And a power supply 180 for providing operational power support to the components of the control device 100 under the control of the controller 110. A battery and associated control circuitry.
A hardware configuration block diagram of a hardware system in the display apparatus 200 according to an exemplary embodiment is exemplarily shown in fig. 3.
When a dual hardware system architecture is adopted, the mechanism relationship of the hardware system can be shown in fig. 3. For convenience of description, one hardware system in the dual hardware system architecture will be referred to as a first hardware system or a system, a-chip, and the other hardware system will be referred to as a second hardware system or N-system, N-chip. The chip A comprises a controller of the chip A and various modules connected with the controller of the chip A through various interfaces, and the chip N comprises a controller of the chip N and various modules connected with the controller of the chip N through various interfaces. The chip a and the chip N may each have a relatively independent operating system, and the operating system of the chip a and the operating system of the chip N may communicate with each other through a communication protocol, which is as follows: the frame layer of the operating system of the a-chip and the frame layer of the operating system of the N-chip can communicate to transmit commands and data, so that two independent subsystems, which are associated with each other, exist in the display device 200.
As shown in fig. 3, the a chip and the N chip may be connected, communicated and powered through a plurality of different types of interfaces. The interface type of the interface between the a chip and the N chip may include a General-purpose input/output (GPIO) interface, a USB interface, an HDMI interface, a UART interface, and the like. One or more of these interfaces may be used for communication or power transfer between the a-chip and the N-chip. For example, as shown in fig. 3, in the dual hardware system architecture, the N chip may be powered by an external power source (power), and the a chip may not be powered by the external power source but by the N chip.
In addition to the interface for connecting with the N chip, the a chip may further include an interface for connecting other devices or components, such as an MIPI interface for connecting a Camera (Camera) shown in fig. 3, a bluetooth interface, and the like.
Similarly, in addition to the interface for connecting with the N chip, the N chip may further include an VBY interface for connecting with a display screen tcon (timer Control register), and an i2S interface for connecting with a power Amplifier (AMP) and a Speaker (Speaker); and an IR/Key interface, a USB interface, a Wifi interface, a bluetooth interface, an HDMI interface, a Tuner interface, and the like.
The dual hardware system architecture of the present application is further described below with reference to fig. 4. It should be noted that fig. 4 is only an exemplary illustration of the dual hardware system architecture of the present application, and does not represent a limitation of the present application. In actual practice, both hardware systems may contain more or less hardware or interfaces as desired.
A block diagram of the hardware architecture of the display device 200 according to fig. 3 is exemplarily shown in fig. 4. As shown in fig. 4, the hardware system of the display device 200 may include an a chip and an N chip, and a module connected to the a chip or the N chip through various interfaces.
The N-chip may include a tuner demodulator 220, a communicator 230, an external device interface 250, a controller 210, a memory 290, a user input interface, a video processor 260-1, an audio processor 260-2, a display 280, an audio output interface 272, and a power supply. The N-chip may also include more or fewer modules in other embodiments.
The tuning demodulator 220 is configured to perform modulation and demodulation processing such as amplification, mixing, resonance and the like on a broadcast television signal received in a wired or wireless manner, so as to demodulate an audio/video signal carried in a frequency of a television channel selected by a user and additional information (e.g., an EPG data signal) from a plurality of wireless or wired broadcast television signals. Depending on the broadcast system of the television signal, the signal path of the tuner 220 may be various, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting, internet broadcasting, or the like; according to different modulation types, the adjustment mode of the signal can be a digital modulation mode or an analog modulation mode; and depending on the type of television signal being received, tuner demodulator 220 may demodulate analog and/or digital signals.
The tuner demodulator 220 is also operative to respond to the user-selected television channel frequency and the television signals carried thereby, in accordance with the user selection, and as controlled by the controller 210.
In other exemplary embodiments, the tuner/demodulator 220 may be in an external device, such as an external set-top box. In this way, the set-top box outputs television audio/video signals after modulation and demodulation, and the television audio/video signals are input into the display device 200 through the external device interface 250.
The communicator 230 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communicator 230 may include a WIFI module 231, a bluetooth communication protocol module 232, a wired ethernet communication protocol module 233, and other network communication protocol modules such as an infrared communication protocol module or a near field communication protocol module.
The display apparatus 200 may establish a connection of a control signal and a data signal with an external control apparatus or a content providing apparatus through the communicator 230. For example, the communicator may receive a control signal of the remote controller 100 according to the control of the controller.
The external device interface 250 is a component for providing data transmission between the N-chip controller 210 and the a-chip and other external devices. The external device interface may be connected with an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner, and may receive data such as a video signal (e.g., moving image), an audio signal (e.g., music), additional information (e.g., EPG), etc. of the external apparatus.
The external device interface 250 may include: a High Definition Multimedia Interface (HDMI) terminal 251, a Composite Video Blanking Sync (CVBS) terminal 252, an analog or digital component terminal 253, a Universal Serial Bus (USB) terminal 254, a red, green, blue (RGB) terminal (not shown), and the like. The number and type of external device interfaces are not limited by this application.
The controller 210 controls the operation of the display device 200 and responds to the user's operation by running various software control programs (e.g., an operating system and/or various application programs) stored on the memory 290.
As shown in fig. 4, the controller 210 includes a read only memory RAM213, a random access memory ROM214, a graphics processor 216, a CPU processor 212, a communication interface 218, and a communication bus. The RAM213 and the ROM214, the graphic processor 216, the CPU processor 212, and the communication interface 218 are connected via a bus.
A ROM213 for storing instructions for various system boots. If the display device 200 is powered on upon receipt of the power-on signal, the CPU processor 212 executes a system boot instruction in the ROM and copies the operating system stored in the memory 290 to the RAM214 to start running the boot operating system. After the start of the operating system is completed, the CPU processor 212 copies the various application programs in the memory 290 to the RAM214, and then starts running and starting the various application programs.
A graphics processor 216 for generating 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 a renderer for generating various objects based on the operator and displaying the rendered result on the display 280.
A CPU processor 212 for executing operating system and application program instructions stored in memory 290. 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 exemplary embodiments, the CPU processor 212 may include a plurality of processors. The plurality of processors may include a main processor and a plurality of or a sub-processor. 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. A plurality of or one sub-processor for performing an operation in a standby mode or the like.
The communication interfaces may include a first interface 218-1 through an nth interface 218-n. These interfaces may be network interfaces that are connected to external devices via a network.
The controller 210 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 280, the controller 210 may perform an operation related to the object selected by the user command.
Wherein 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 an 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.
The memory 290 includes a memory for storing various software modules for driving and controlling the display apparatus 200. Such as: various software modules stored in memory 290, including: the system comprises a basic module, a detection module, a communication module, a display control module, a browser module, various service modules and the like.
The basic module is a bottom layer software module for signal communication between hardware in the display device 200 and sending processing and control signals to an upper layer module. The detection module is a management module used for collecting various information from various sensors or user input interfaces, and 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 a module for controlling the display 280 to display image content, and may be used to play information such as multimedia image content and UI interface. The communication module is used for carrying out control and data communication with external equipment. And the browser module is used for executing data communication between the browsing servers. The service module is a module for providing various services and various application programs.
Meanwhile, the memory 290 is also used to store visual effect maps and the like for receiving external data and user data, images of respective items in various user interfaces, and a focus object.
A user input interface for transmitting an input signal of a user to the controller 210 or transmitting a signal output from the controller to the user. For example, the control device (e.g., a mobile terminal or a remote controller) may send an input signal, such as a power switch signal, a channel selection signal, a volume adjustment signal, etc., input by a user to the user input interface, and then the input signal is forwarded to the controller by the user input interface; alternatively, the control device may receive an output signal such as audio, video, or data output from the user input interface via the controller, and display the received output signal or output the received output signal in audio or vibration form.
In some embodiments, a user may enter a user command on a Graphical User Interface (GUI) displayed on the display 280, and the user input interface receives the user input command 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.
The video processor 260-1 is configured to receive a video signal, and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to a standard codec protocol of the input signal, so as to obtain a video signal that is directly displayed or played on the display 280.
Illustratively, the video processor 260-1 includes a demultiplexing module, a video decoding module, an image synthesizing 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 a frame rate of an input video, such as a 24Hz, 25Hz, 30Hz, or 60Hz video, into a 60Hz, 120Hz, or 240Hz frame rate, where the input frame rate may be related to a source video stream, and the output frame rate may be related to an update rate of a display. The input is realized in a common format by using a frame insertion mode.
And a display formatting module for converting the signal output by the frame rate conversion module into a signal conforming to a display format of a display, such as converting the format of the signal output by the frame rate conversion module to output an RGB data signal.
And a display 280 for receiving the image signal input from the video processor 260-1 and displaying the video content and image and the menu manipulation interface. The display 280 includes a display component for presenting a picture and a driving component for driving the display of an image. The video content may be displayed from the video in the broadcast signal received by the tuner/demodulator 220, or from the video content input from the communicator or the external device interface. And a display 220 simultaneously displaying a user manipulation interface UI generated in the display apparatus 200 and used to control the display apparatus 200.
And, a driving component for driving the display according to the type of the display 280. Alternatively, in case the display 280 is a projection display, it may also comprise a projection device and a projection screen.
The audio processor 260-2 is configured to receive an audio signal, decompress and decode the audio signal according to a standard codec protocol of the input signal, and perform noise reduction, digital-to-analog conversion, amplification and other audio data processing to obtain an audio signal that can be played in the speaker 272.
An audio output interface 270 for receiving the audio signal output by the audio processor 260-2 under the control of the controller 210, wherein the audio output interface may include a speaker 272 or an external sound output terminal 274 for outputting to a generating device of an external device, such as: external sound terminal or earphone output terminal.
In other exemplary embodiments, video processor 260-1 may comprise one or more chip components. The audio processor 260-2 may also include one or more chips.
And, in other exemplary embodiments, the video processor 260-1 and the audio processor 260-2 may be separate chips or may be integrated in one or more chips with the controller 210.
And a power supply for supplying power supply support to the display apparatus 200 from the power input from the external power source under the control of the controller 210. The power supply may include a built-in power supply circuit installed inside the display apparatus 200, or may be a power supply installed outside the display apparatus 200, such as a power supply interface for providing an external power supply in the display apparatus 200.
Similar to the N-chip, as shown in fig. 4, the a-chip may include a controller 310, a communicator 330, a detector 340, and a memory 390. A video processor 360, a user input interface, an audio processor, a display, an audio output interface may also be included in some embodiments. In some embodiments, there may also be a power supply that independently powers the A-chip.
The communicator 330 is a component for communicating with an external device or an external server according to various communication protocol types. For example: the communicator 330 may include a WIFI module 331, a bluetooth communication protocol module 332, a wired ethernet communication protocol module 333, and other network communication protocol modules such as an infrared communication protocol module or a near field communication protocol module.
The communicator 330 of the a-chip and the communicator 230 of the N-chip also interact with each other. For example, the WiFi module 231 within the N-chip hardware system is used to connect to an external network, generate network communication with an external server, and the like. The WiFi module 331 in the a-chip hardware system is used to connect to the N-chip WiFi module 231 without making a direct connection with an external network or the like, and the a-chip is connected to an external network through the N-chip. Therefore, for the user, a display device as in the above embodiment displays a WiFi account to the outside.
The detector 340 is a component of the display device a chip for collecting signals of an external environment or interacting with the outside. The detector 340 may include a light receiver 342, a sensor for collecting the intensity of ambient light, which may be used to adapt to display parameter changes, etc.; the system may further include an image collector 341, such as a camera, a video camera, etc., which may be configured to collect external environment scenes, collect attributes of the user or interact gestures with the user, adaptively change display parameters, and identify user gestures, so as to implement a function of interaction with the user.
An external device interface 350, which provides a component for data transmission between the controller 310 and the N-chip or other external devices. The external device interface may be connected with an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner.
The controller 310 controls the operation of the display device 200 and responds to the user's operation by running various software control programs stored on the memory 390 (e.g., using installed third party applications, etc.), and interacting with the N-chip.
As shown in fig. 4, the controller 310 includes a read only memory ROM313, a random access memory RAM314, a graphics processor 316, a CPU processor 312, a communication interface 318, and a communication bus. The ROM313 and the RAM314, the graphic processor 316, the CPU processor 312, and the communication interface 318 are connected via a bus.
A ROM313 for storing instructions for various system boots. CPU processor 312 executes system boot instructions in ROM and copies the operating system stored in memory 390 to RAM314 to begin running the boot operating system. After the start of the operating system is completed, the CPU processor 312 copies various application programs in the memory 390 to the RAM314, and then starts running and starting various application programs.
The CPU processor 312 is used for executing the operating system and application program instructions stored in the memory 390, communicating with the N chip, transmitting and interacting signals, data, instructions, etc., and executing various application programs, data and contents according to various interaction instructions received from the outside, so as to finally display and play various audio and video contents.
The communication interfaces may include a first interface 318-1 through an nth interface 318-n. These interfaces may be network interfaces connected to external devices via a network, or may be network interfaces connected to the N-chip via a network.
The controller 310 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 280, the controller 210 may perform an operation related to the object selected by the user command.
A graphics processor 316 for generating 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 a renderer for generating various objects based on the operator and displaying the rendered result on the display 280.
Both the A-chip graphics processor 316 and the N-chip graphics processor 216 are capable of generating various graphics objects. In distinction, if application 1 is installed on the a-chip and application 2 is installed on the N-chip, the a-chip graphics processor 316 generates a graphics object when a user performs a command input by the user in application 1 at the interface of application 1. When a user makes a command input by the user in the interface of the application 2 and within the application 2, a graphic object is generated by the graphic processor 216 of the N chip.
Fig. 5 is a diagram schematically illustrating a functional configuration of a display device according to an exemplary embodiment.
As shown in fig. 5, the memory 390 of the a-chip and the memory 290 of the N-chip are used to store an operating system, an application program, contents, user data, and the like, respectively, and perform system operations for driving the display device 200 and various operations in response to a user under the control of the controller 310 of the a-chip and the controller 210 of the N-chip. The A-chip memory 390 and the N-chip memory 290 may include volatile and/or non-volatile memory.
The memory 290 is specifically configured to store an operating program for driving the controller 210 in the display device 200, and store various applications installed in the display device 200, various applications downloaded by a user from an external device, various graphical user interfaces related to the applications, various objects related to the graphical user interfaces, user data information, and internal data of various supported applications. The memory 290 is used to store system software such as an Operating System (OS) kernel, middleware, and applications, and to store input video data and audio data, and other user data.
The memory 290 is specifically used for storing drivers and related data such as the video processor 260-1 and the audio processor 260-2, the display 280, the communication interface 230, the tuner demodulator 220, the input/output interface, and the like.
In some embodiments, memory 290 may store software and/or programs, software programs for representing an Operating System (OS) including, for example: a kernel, middleware, an Application Programming Interface (API), and/or an application program. For example, the kernel may control or manage system resources, or functions implemented by other programs (e.g., the middleware, APIs, or applications), and the kernel may provide interfaces to allow the middleware and APIs, or applications, to access the controller to implement controlling or managing system resources.
The memory 290, for example, includes a broadcast receiving module 2901, a channel control module 2902, a volume control module 2903, an image control module 2904, a display control module 2905, an audio control module 2906, an external instruction recognition module 2907, a communication control module 2908, a light receiving module 2909, a power control module 2910, an operating system 2911, and other applications 2912, a browser module, and the like. The controller 210 performs functions such as: the system comprises a broadcast television signal receiving and demodulating function, a television channel selection control function, a volume selection control function, an image control function, a display control function, an audio control function, an external instruction identification function, a communication control function, an optical signal receiving function, an electric power control function, a software control platform supporting various functions, a browser function and other various functions.
The memory 390 includes a memory storing various software modules for driving and controlling the display apparatus 200. Such as: various software modules stored in memory 390, including: the system comprises a basic module, a detection module, a communication module, a display control module, a browser module, various service modules and the like. Since the functions of the memory 390 and the memory 290 are similar, reference may be made to the memory 290 for relevant points, and thus, detailed description thereof is omitted here.
Illustratively, the memory 390 includes an image control module 3904, an audio control module 3906, an external instruction recognition module 3907, a communication control module 3908, a light receiving module 3909, an operating system 3911, and other application programs 3912, a browser module, and the like. The controller 210 performs functions such as: the system comprises an image control function, a display control function, an audio control function, an external instruction identification function, a communication control function, an optical signal receiving function, an electric power control function, a software control platform supporting various functions, a browser function and other various functions.
Differently, the external instruction recognition module 2907 of the N-chip and the external instruction recognition module 3907 of the a-chip can recognize different instructions.
Illustratively, since the image receiving device such as a camera is connected with the a-chip, the external instruction recognition module 3907 of the a-chip may include an image recognition module 3907-1, a graphic database is stored in the image recognition module 3907-1, and when the camera receives an external graphic instruction, the camera corresponds to the instruction in the graphic database to perform instruction control on the display device. Since the voice receiving device and the remote controller are connected to the N-chip, the external command recognition module 2907 of the N-chip may include a voice recognition module 2907-2, a voice database is stored in the voice recognition module 2907-2, and when the voice receiving device receives an external voice command or the like, the voice receiving device and the like perform a corresponding relationship with a command in the voice database to perform command control on the display device. Similarly, a control device 100 such as a remote controller is connected to the N-chip, and the key command recognition module 2907-3 performs command interaction with the control device 100.
A block diagram of a configuration of a software system in a display device 200 according to an exemplary embodiment is exemplarily shown in fig. 6 a.
For an N-chip, as shown in fig. 6a, the operating system 2911, includes executing operating software for handling various basic system services and for performing hardware related tasks.
In some embodiments, portions of the operating system kernel may contain a series of software to manage the display device hardware resources and provide services to other programs or software code.
In other embodiments, portions of the operating system kernel may include one or more device drivers, which may be a set of software code in the operating system that assists in operating or controlling the devices or hardware associated with the display device. The drivers may contain code that operates the video, audio, and/or other multimedia components. Examples include a display, a camera, Flash, WiFi, and audio drivers.
The accessibility module 2911-1 is configured to modify or access the application program to achieve accessibility and operability of the application program for displaying content.
A communication module 2911-2 for connection to other peripherals via associated communication interfaces and a communication network.
The user interface module 2911-3 is configured to provide an object for displaying a user interface, so that each application program can access the object, and user operability can be achieved.
Control applications 2911-4 for controlling process management, including runtime applications and the like.
The event transmission system 2914 may be implemented within the operating system 2911 or within the application 2912. In some embodiments, an aspect is implemented within the operating system 2911, while implemented in the application 2912, for listening for various user input events, and will implement one or more sets of predefined operations in response to various events referring to the recognition of various types of events or sub-events.
The event monitoring module 2914-1 is configured to monitor an event or a sub-event input by the user input interface.
The event identification module 2914-2 is used to input various event definitions for various user input interfaces, identify various events or sub-events, and transmit them to the process for executing one or more sets of their corresponding handlers.
The event or sub-event refers to an input detected by one or more sensors in the display device 200 and an input of an external control device (e.g., the control apparatus 100). Such as: the method comprises the following steps of inputting various sub-events through voice, inputting a gesture sub-event through gesture recognition, inputting a remote control key command of a control device and the like. Illustratively, the one or more sub-events in the remote control include a variety of forms including, but not limited to, one or a combination of key presses up/down/left/right/, ok keys, key presses, and the like. And non-physical key operations such as move, hold, release, etc.
The interface layout management module 2913, directly or indirectly receiving the input events or sub-events from the event transmission system 2914, monitors the input events or sub-events, and updates the layout of the user interface, including but not limited to the position of each control or sub-control in the interface, and the size, position, and level of the container, which are related to the layout of the interface.
Since the functions of the operating system 3911 of the a chip are similar to those of the operating system 2911 of the N chip, reference may be made to the operating system 2911 for relevant points, and details are not repeated here.
As shown in fig. 6b, the application layer of the display device contains various applications that can be executed at the display device 200.
The N-chip application layer 2912 may include, but is not limited to, one or more applications such as: a video-on-demand application, an application center, a game application, and the like. The application layer 3912 of the a-chip may include, but is not limited to, one or more applications such as: live television applications, media center applications, and the like. It should be noted that what applications are respectively contained in the a chip and the N chip is determined according to an operating system and other designs, and the present invention does not need to make specific limitations and divisions on the applications contained in the a chip and the N chip.
The live television application program can provide live television through different signal sources. For example, a live television application may provide television signals using input 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.
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.
The media center application program can provide various applications for playing multimedia contents. 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.
The application program center can provide and store various application programs. 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 a display device. The application center may obtain these applications from different sources, store them in local storage, and then be operable on the display device 200.
A schematic diagram of a user interface in a display device 200 according to an exemplary embodiment is illustrated in fig. 7. As shown in fig. 7, the user interface includes a plurality of view display areas, illustratively, a first view display area 201 and a play screen 202, wherein the play screen includes a layout of one or more different items. And a selector in the user interface indicating that the item is selected, the position of the selector being movable by user input to change the selection of a different item.
It should be noted that the multiple view display areas may present display screens of different hierarchies. For example, a first view display area may present video chat project content and a second view display area may present application layer project content (e.g., web page video, VOD presentations, application screens, etc.).
Optionally, the different view display areas are presented with different priorities, and the display priorities of the view display areas are different among the view display areas with different priorities. If the priority of the system layer is higher than that of the application layer, when the user uses the acquisition selector and picture switching in the application layer, the picture display of the view display area of the system layer is not blocked; and when the size and the position of the view display area of the application layer are changed according to the selection of the user, the size and the position of the view display area of the system layer are not influenced.
The display frames of the same hierarchy can also be presented, at this time, the selector can switch between the first view display area and the second view display area, and when the size and the position of the first view display area are changed, the size and the position of the second view display area can be changed along with the change.
Since the a-chip and the N-chip may have independent operating systems installed therein, there are two independent but interrelated subsystems in the display device 200. For example, Android (Android) and various APPs can be independently installed on the chip a and the chip N, so that each chip can realize a certain function, and the chip a and the chip N cooperatively realize a certain function.
In the display device provided by the embodiment of the application, the camera is connected with the auxiliary chip, and the auxiliary chip can perform artificial intelligence operation on the image obtained by the camera; the microphone is connected with the main chip, and the main chip performs gain processing on the sound collected by the microphone. When the display device provided by the embodiment of the application is used for video chat, the auxiliary chip collects video images through the camera, and by using human face recognition, action (lip) recognition and other artificial intelligent application technologies, the picture in the video chat process is not limited to the picture with a fixed focal length any more, but the variable-focus video focused by a target speaker can be realized by combining the human face recognition and the lip recognition, so that no matter which corner of the person is or how far away from the camera, the face focusing can be automatically carried out, namely, the face can be kept unchanged in the display frame at the opposite end of the display device. When the display device provided by the embodiment of the application is used for video chat, the display size of the face can be changed along with the distance between a person and the camera, but when the distance between the person and the camera is changed, the distance between the person and a microphone (far-field microphone) on the display device is changed, so that the sound can have certain stability while the display size of the face is not changed.
Fig. 8 is a flowchart illustrating an audio gain adjustment method according to an embodiment of the present application. As shown in fig. 8, an audio gain adjustment method provided in an embodiment of the present application includes:
s101: and acquiring the focal length information corresponding to the current image in the video chat.
In the video chat, the auxiliary chip obtains images through the camera, and the automatic focusing is carried out on the face when the images are collected. In the embodiment of the application, the face automatic focusing realizes focusing through a phase method. The phase method focusing refers to judging whether the light beam is focused or not according to the time sequence of the light beam reaching the photosensitive element, namely phase offset. During automatic focusing, the camera places a grid plate with light-transmitting lines and light-proof lines alternately arranged in parallel at the position of the photosensitive element, and symmetrically places two light-receiving elements at proper positions behind the grid plate along the optical axis.
When focusing, the grid plate moves up and down along the vertical direction of the optical axis, and when the focusing surface is superposed with the position of the grid plate (namely focusing), the light rays penetrating through the grid plate can simultaneously reach the two light receiving elements behind the plate; when the light is out of focus (front focus or back focus), the two light beams can reach the light receiving element only in tandem, and the output signals have a phase difference. Because the positions of the wave crests of the front focus and the rear focus are different, the camera can quickly judge that the front focus and the rear focus should deviate towards the same side, and the front focus and the rear focus do not need to move back and forth for multiple times like a contrast type to be focused. The specific calculation principle is shown in fig. 9, and will not be described herein.
In some embodiments, the image transmitted to the opposite end is a cut-out face image, that is, due to the existence of auto-focusing, no matter how far the person is from the television, the face in the acquired image is locally transmitted to the opposite end, and the opposite end cannot feel the distance change between the local person and the television from the received video. However, if the sound adopts a fixed gain, the face received by the opposite terminal cannot change with the distance between the local person and the television, but the sound received by the opposite terminal changes with the distance between the local person and the television.
When the camera of the auxiliary chip collects images, the automatic focusing can be carried out in real time, and the focal length information can be output in real time. In image processing, the degree of clearness and focusing of an image is determined by the number of high-frequency components of the image, if the high-frequency components are more, the image is clear, otherwise, the image is blurred, the focal length needs to be adjusted to achieve clearness, and methods for judging the clearness of the image comprise Fourier transform (FFT) and Discrete Cosine Transform (DCT); each frame of Image outputs a value representing whether the Image is clear, such as an Image distance (Image distance). Specifically, in the embodiment of the present application, the Image distance is calculated by a high frequency component method, a smoothing method, a threshold integration method, a grayscale difference method, a laplacian Image energy function, or the like.
In order to quickly output the focal length information corresponding to the current image, an improved gray difference method can be adopted as the image definition evaluation function, namely, the sum of squares of brightness value differences of all pixels of one image read aloud to the surrounding nearby pixels is used as the image focusing evaluation function, and the values of the adjacent same-field image evaluation functions are calculated, wherein the focusing evaluation functions are as follows:
f (x, y) represents the luminance value of the pixel in the x-th row and the y-th column. The algorithm selects two adjacent pixels (the left side and the upper side of the F (x, y) pixel) for comparison, when an Image is focused clearly, the F (x, y) is maximum, namely the corresponding Image distance value is maximum, the Image distance is calculated in real time in a self-adaptive manner by adjusting the focal length step length of a lens, when the relative maximum is reached, the automatic focusing is completed, and the corresponding focal length information is output.
S102: and acquiring microphone gain according to the focal length information.
The change information of the Image distance can reflect the change information of the focal length of the current lens, and by analogy, the change of the distance from the current user to the camera of the display device, namely the change condition of the distance when the user calls the camera last time can be corresponded. Generally, if the Image distance becomes large, it indicates that the distance between the current user and the display device (camera) becomes large, and if the Image distance becomes small, it indicates that the distance between the current user and the display device (camera) becomes small. Therefore, the corresponding focal length when the Image distance reaches the relative maximum, namely the focal length information corresponding to the current Image, is found out according to the Image distance and the change condition thereof. And determining the distance between the current user and the far-field microphone according to the focal length information so as to determine the change condition of the distance between the current user and the far-field microphone, further acquiring the microphone gain, and performing gain processing on the acquired audio data through the microphone gain.
In the embodiment of the application, in order to facilitate the acquisition of the microphone gain, the distance between the current user and the display device (camera) and the corresponding focal length information are counted, and the experience value is taken to establish a corresponding list of the microphone gain and the corresponding focal length information. And when the focal length information corresponding to the current image in the video chat is determined, acquiring the microphone gain according to the microphone gain and the corresponding list of the focal length information.
The list of correspondence between microphone gain and focus information is established based on empirical values, as shown in table 1, where table 1 is given by way of example only and is not intended to limit the present application.
Table 1:
| corresponding distance | Focal length information | Microphone gain |
| 3 m | 0.3 mm | 0dB |
| 4 m | 0.4 mm | 10dB |
| 2 m | 0.2 mm | -10dB |
| 2.5 m | 0.25 mm | -8dB |
| 3.5 m | 0.35 mm | 8dB |
Therefore, when the acquired focal length information is 0.2 mm, the corresponding microphone gain of-10 dB can be acquired according to the microphone gain and focusing distance information corresponding list shown in table 1, and then the acquired corresponding audio data is subjected to gain processing through the acquired microphone gain.
And if the acquired focal length information is not in the table, calculating the corresponding microphone gain by an interpolation method. For example, if the acquired focal length information is 0.375 mm, the microphone gain may be calculated by the following equation, where X is the corresponding microphone gain.
X-9 dB can be calculated, i.e. when the focal length information is 0.375 mm, the corresponding microphone gain is 9 dB.
In addition, in the embodiment of the present application, in order to facilitate the acquisition of the microphone gain, the distance between the current user and the display device (camera) and the corresponding Image distance may be counted, and a function model of the microphone gain and the focal length information may be established. When the focal length information corresponding to the current image in the video chat is determined, a function model of the microphone gain and the focal length information is obtained; and acquiring the microphone gain according to the focal length information and a function model combining the microphone gain and the focal length information.
In the embodiment of the present application, to facilitate the acquisition of the microphone gain, the focal length information may be acquired by using an adaptive method according to the focal length information.
S103: and adjusting the audio frequency received by the microphone according to the acquired microphone gain value.
The microphone gain acquired through the focal length information is used for adjusting the audio received by the microphone, namely the acquired microphone gain value is used for carrying out gain processing on the audio received by the microphone, so that the stability of the sound size of the audio received by the microphone is ensured.
The present application thus provides an audio gain adjustment method, comprising: the method comprises the steps of obtaining focal length information of a current video image in video chatting, and obtaining microphone gain according to the focal length information. In the process of video chatting with variable-focus processing through the smart television, focal length information is obtained according to automatic zoom processing of video images, corresponding microphone gain is obtained according to the focal length information, and gain processing is carried out on current audio data in the video chatting through the obtained microphone gain. In the method, the device and the system, the focal length information is utilized to process the video image in the video chat, and the microphone gain is determined, so that the audio data is subjected to gain processing based on the distance between a person and the microphone in the video chat process, the fluctuation of the sound volume locally sent to the opposite terminal caused by the change of the distance between the person and the television is reduced, the sound volume locally sent to the opposite terminal is basically unchanged, and the stability of the sound in the video chat process is ensured.
Based on the audio gain adjusting method provided by the embodiment of the application, the embodiment of the application also provides a video chatting method. Fig. 10 is a schematic flowchart of a video chat method according to an embodiment of the present application.
As shown in fig. 10, the video chat method provided in the embodiment of the present application includes:
s201: the auxiliary chip transmits the video image after the automatic zooming processing to the main chip and transmits the focal length information corresponding to the video image to the main chip.
S202: the main chip receives the video image and the focal length information.
S203: and the main chip acquires microphone gain according to the focal length information and performs gain processing on the audio corresponding to the video image according to the microphone gain so as to reduce the fluctuation of the volume of the audio locally sent to the opposite terminal.
S204: and the main chip synchronizes the audio subjected to gain processing with the video image and transmits the synchronized audio and video to a display frame of an opposite terminal.
In the embodiment of the application, the auxiliary chip acquires the video image through the camera, obtains the video image capable of automatically zooming through automatic zooming processing in the acquisition process of the acquired video image, and outputs the focal length information corresponding to the video image capable of automatically zooming. The auxiliary chip transmits the video image after the automatic zooming processing to the main chip, and simultaneously transmits the focal length information corresponding to the video image to the main chip. In the embodiment of the application, at least one of a network, a serial port, a USB and an HDMI communication mode is included between the main chip and the auxiliary chip. Therefore, the auxiliary chip can transmit the video image and the focal length information corresponding to the video image to the main chip through a network, a serial port, a USB or an HDMI. The auxiliary chip can dynamically select any one of a network communication mode, a serial port communication mode, a USB communication mode and an HDMI communication mode based on the communication stability of the auxiliary chip and the main chip, and the communication mode is not particularly limited.
When the auxiliary chip transmits the video image and the focal length information corresponding to the video image to the main chip through a network, a serial port, a USB or an HDMI, the main chip receives the video image and the focal length information corresponding to the video image.
In some embodiments, the auto-zoom processed video image is an image cropped out of a view captured by the camera according to the focal length. In some embodiments, the video image after the auto-zoom process is a face image cut out according to the tracking result of the auto-zoom.
In the implementation of the application, the main chip collects audio information through the microphone, wherein the audio information collected by the microphone is synchronous with the video image collected by the camera. When the main chip receives the video image transmitted by the auxiliary chip and the focal length information corresponding to the video image, determining the gain of the microphone according to the focal length information corresponding to the video image, and then performing gain processing on the acquired audio information through the determined gain of the microphone to obtain the audio after the gain processing.
After the acquired audio information is subjected to gain processing, the main chip synchronizes the audio subjected to gain processing with the video image to obtain audio-video synchronous chatting data, and the audio-video synchronous chatting data is transmitted to a display frame of an opposite terminal to further complete video chatting.
The video chatting method provided by the embodiment of the application realizes mutual cooperation of the main chip and the auxiliary chip, and solves the problem that a single computing chip needs to support the instant communication functions (video coding and decoding, transmission) of video chatting and also needs to carry out the computing pressure of a real-time artificial intelligence algorithm (face recognition and lip recognition). Meanwhile, in the video chatting method provided in the embodiment of the application, in the process of video chatting through variable-focus processing of the smart television, the focal length information is obtained according to automatic zoom processing of a video image, the corresponding microphone gain is obtained according to the focal length information, and the gain processing is performed on the current audio data in the video chatting through the obtained microphone gain, so that the audio data is subjected to gain processing based on the distance between a person and a microphone in the video chatting process, the stability of sound in the video chatting process is ensured, namely the face can be focused through real-time zoom in the video chatting process, and the sound can be stable and smooth in real time.
In order to facilitate acquisition of microphone gain, in the video chat method provided in the embodiment of the present application, the acquiring, by the main chip, microphone gain according to the focal length information includes:
the main chip acquires a microphone gain and focus information corresponding list;
and searching the focal length information and microphone gain corresponding list according to the focal length information to obtain the microphone gain.
Or, to facilitate obtaining of microphone gain, in the video chat method provided in the embodiment of the present application, the obtaining, by the main chip, the microphone gain according to the focal length information includes:
the main chip acquires a function model of microphone gain and focal length information;
and acquiring the microphone gain according to the focal length information and a function model combining the microphone gain and the focal length information.
The specific steps of obtaining the microphone gain through the corresponding list of the microphone gain and the corresponding focal length information or the function model of the microphone gain and the focal length information may refer to the audio gain adjustment method provided in the above embodiment, and are not described herein again. The acquisition of the microphone gain by the video chat method provided by the embodiment of the application is not limited to the acquisition by a corresponding list of the microphone gain and the opposite focal length information or a function model of the microphone gain and the focal length information, and the focal length information can also be acquired by a self-adaptive method.
Further, in the video chat method provided in the embodiment of the present application, the transmitting the focal length information corresponding to the video image to the main chip includes:
judging whether the focal length information corresponding to the video image is the same as the focal length information corresponding to the video image at the previous moment;
and when the focal length information corresponding to the video image is different from the focal length information corresponding to the video image at the previous moment, transmitting the focal length information corresponding to the video image to a main chip.
Therefore, when the auxiliary chip transmits the video image after the automatic zooming processing to the main chip, whether the focal length information corresponding to the video image at the current moment is changed compared with the focal length information corresponding to the video image at the previous moment is judged by comparing the focal length information corresponding to the video image at the current moment with the focal length information corresponding to the video image at the previous moment, and when the focal length information corresponding to the video image at the current moment is changed compared with the focal length information corresponding to the video image at the previous moment, the focal length information corresponding to the video image is transmitted to the main chip, so that the calculation consumption of the main chip can be reduced.
Based on the audio gain adjustment method and the video chat method provided by the embodiment of the application, the embodiment of the application also provides a display device. The display device provided by the embodiment of the application comprises a display, a display and a display module, wherein the display is configured to display a user interface;
a controller communicatively coupled to the display, the controller configured to execute a presentation user interface:
the audio gain adjusting device comprises a main chip connected with the display and an auxiliary chip connected with the main chip through at least one of network, serial port, USB and HDMI communication modes, wherein the main chip is configured to execute the audio gain adjusting method provided by the embodiment; or,
the main chip and the auxiliary chip are configured to cooperatively execute the video chat method provided by the above embodiment.
For the audio gain adjustment method and the video chat method, refer to the foregoing embodiments, and for other features related to the display device provided in the embodiments of the present application, refer to the display device 200 provided in the foregoing embodiments, which are not described herein again.
All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments shown in the present application without inventive effort, shall fall within the scope of protection of the present application. Moreover, while the disclosure herein has been presented in terms of exemplary one or more examples, it is to be understood that each aspect of the disclosure can be utilized independently and separately from other aspects of the disclosure to provide a complete disclosure.
It should be understood that the terms "first," "second," "third," and the like in the description and in the claims of the present application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used are interchangeable under appropriate circumstances and can be implemented in sequences other than those illustrated or otherwise described herein with respect to the embodiments of the application, for example.
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.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. A method for audio gain adjustment, the method comprising:
acquiring focal length information corresponding to a current image in video chat;
acquiring microphone gain according to the focal length information;
and adjusting the audio frequency received by the microphone according to the acquired microphone gain value.
2. The audio gain adjustment method of claim 1, wherein the obtaining microphone gain according to the focal length information comprises:
acquiring a microphone gain and focus information corresponding list;
and searching the focal length information and microphone gain corresponding list according to the focal length information to obtain the microphone gain.
3. The audio gain adjustment method of claim 1, wherein the obtaining microphone gain according to the focal length information comprises:
acquiring a function model of microphone gain and focal length information;
and acquiring the microphone gain according to the focal length information and a function model combining the microphone gain and the focal length information.
4. A video chat method, the method comprising:
the auxiliary chip transmits the video image subjected to automatic zooming processing to a main chip and transmits focal length information corresponding to the video image to the main chip;
the main chip receives the video image and the focal length information;
the main chip acquires microphone gain according to the focal length information and performs gain processing on the audio corresponding to the video image according to the microphone gain so as to reduce the fluctuation of the audio volume locally sent to the opposite terminal;
and the main chip synchronizes the audio subjected to gain processing with the video image and transmits the synchronized audio and video to a display frame of an opposite terminal.
5. The video chat method of claim 4, further comprising: the main chip obtains microphone gain according to the focal length information, and the method comprises the following steps:
the main chip acquires a microphone gain and focus information corresponding list;
and searching the focal length information and microphone gain corresponding list according to the focal length information to obtain the microphone gain.
6. The video chat method of claim 4, further comprising: the main chip obtains microphone gain according to the focal length information, and the method comprises the following steps:
the main chip acquires a function model of microphone gain and focal length information;
and acquiring the microphone gain according to the focal length information and a function model combining the microphone gain and the focal length information.
7. The video chat method of claim 4, wherein the transmitting the focal length information corresponding to the video image to the main chip comprises:
judging whether the focal length information corresponding to the video image is the same as the focal length information corresponding to the video image at the previous moment;
and when the focal length information corresponding to the video image is different from the focal length information corresponding to the video image at the previous moment, transmitting the focal length information corresponding to the video image to a main chip.
8. A display device, comprising:
a display configured to display a user interface;
a controller communicatively coupled to the display, the controller configured to execute a presentation user interface:
a main chip connected with the display, and an auxiliary chip connected with the main chip through at least one of network, serial port, USB and HDMI communication, wherein the main chip is configured to execute the audio gain adjustment method of any one of claims 1-3; or,
the primary chip and the secondary chip are configured to cooperatively perform the video chat method of any of claims 4-7.
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