CN112073663B - Audio gain adjusting method, video chat method and display device - Google Patents

Audio gain adjusting method, video chat method and display device Download PDF

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Publication number
CN112073663B
CN112073663B CN201910736428.5A CN201910736428A CN112073663B CN 112073663 B CN112073663 B CN 112073663B CN 201910736428 A CN201910736428 A CN 201910736428A CN 112073663 B CN112073663 B CN 112073663B
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China
Prior art keywords
focal length
length information
video
audio
gain
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Active
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CN201910736428.5A
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Chinese (zh)
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CN112073663A (en
Inventor
杨香斌
王峰
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Hisense Visual Technology Co Ltd
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Hisense Visual Technology Co Ltd
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Priority to PCT/CN2020/093101 priority Critical patent/WO2020248829A1/en
Publication of CN112073663A publication Critical patent/CN112073663A/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/485—End-user interface for client configuration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/485—End-user interface for client configuration
    • H04N21/4852—End-user interface for client configuration for modifying audio parameters, e.g. switching between mono and stereo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working

Abstract

The audio gain adjusting method, the video chat method and the display equipment provided by the application are particularly suitable for a social television, and the method comprises the following steps: the auxiliary chip transmits the video image after the automatic zooming treatment to the 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 obtains microphone gain according to the focal length information, and carries out gain processing on audio corresponding to the video image according to the microphone gain; and the main chip synchronizes the audio after gain processing with the video image and transmits the synchronized audio and video to a display frame at the opposite end. According to the technical scheme provided by the application, the microphone gain is determined by processing the video image in the video chat by utilizing the focal length information, so that the gain processing of the audio data based on the distance between the person and the microphone in the video chat process is realized, and the stability of sound in the video chat process is ensured.

Description

Audio gain adjusting method, video chat method and display device
Technical Field
The present application relates to the 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 intelligent televisions, cameras are gradually arranged on the intelligent televisions and used for voice and video chat, and the function of 'watching and chat at the same time' of the televisions is achieved. Usually, the intelligent television is fixedly arranged in a relatively large space such as a living room, and a certain distance is often kept between the intelligent television and the intelligent television when people use the intelligent television; and when people are chatting with smart television voice and video, the movement of people is often accompanied. If the person who uses the intelligent television voice video chat moves along with the movement, the voice is unstable, for example, the voice is negligent and negligent to the person who is opposite to the voice video chat, the voice is very unstable, and sometimes even the voice video chat is affected.
However, at present, when the voice and video chat is mainly applied to the scene, although in order to ensure the voice quality during the voice and video chat, the handheld mobile devices such as the mobile phones mostly perform noise reduction processing or gain processing on the voice. However, since the voice-video chat applied to the handheld mobile device such as the mobile phone belongs to the near-field voice-video chat, the noise reduction processing or the gain processing on the sound of the handheld mobile device such as the mobile phone is the processing on the sound in the scene with a determined distance. However, in the case of using a smart tv for voice-video chat, which is a far-field voice-video chat, the distance between the speaker and the microphone on the tv is usually relatively large and may also vary with the movement of the speaker. Therefore, the processing technology of the handheld mobile device such as the mobile phone and the like on the sound in the voice and video chat can not 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 chat method and display equipment, which ensure the stability of sound in video chat.
In a first aspect, the present application provides an audio gain adjustment method, the method comprising:
focal length information corresponding to a current image in video chat is obtained;
acquiring microphone gain according to the focal length information; and adjusting the audio received by the microphone according to the acquired microphone gain value.
In a second aspect, the present application provides a video chat method, the method comprising:
the auxiliary chip transmits the video image after the automatic zooming treatment to the 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 so as to reduce fluctuation of audio volume locally sent to an opposite terminal;
and the main chip synchronizes the audio after gain processing with the video image and transmits the synchronized audio and video to a display frame at the opposite end.
In a third aspect, the present application provides a display apparatus comprising:
a display configured to display a user interface;
a controller in communicative connection with the display, the controller configured to perform presenting a 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 adjustment methods; or alternatively, the process may be performed,
the primary and secondary chips are configured to cooperatively perform the video chat method of any of the above.
The application provides an audio gain adjusting method, a video chat method and display equipment, which comprise the following steps: focal length information of a current video image in video chat is acquired, microphone gain is acquired according to the focal length information, and audio received by a microphone is adjusted according to the acquired microphone gain value. In the process of video chat through variable-focus processing of the intelligent 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 chat by obtaining the microphone gain. In the application, the microphone gain is determined by processing the video image in the video chat by utilizing the focal length information, so that the gain processing of the audio data based on the distance between the person and the microphone in the video chat process is realized, the fluctuation of the sound volume locally transmitted to the opposite terminal caused by the change of the distance between the person and the television is reduced, the sound volume locally transmitted 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 illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
A schematic diagram of an operation scenario between a display device and a control apparatus according to an embodiment is exemplarily shown in fig. 1;
a hardware configuration block diagram of the control apparatus 100 according to the embodiment is exemplarily shown in fig. 2;
a hardware configuration block diagram of the display device 200 in accordance with the embodiment is exemplarily shown in fig. 3;
a hardware architecture block diagram of the display device 200 according to fig. 3 is exemplarily shown in fig. 4;
a functional configuration diagram of the display device 200 according to the embodiment is exemplarily shown in fig. 5;
a schematic diagram of the software configuration in the display device 200 according to an embodiment is exemplarily shown in fig. 6 a;
a schematic configuration of an application in the display device 200 according to an embodiment is exemplarily shown in fig. 6 b;
a schematic diagram of a user interface in a display device 200 according to an embodiment is exemplarily shown in fig. 7;
a flow diagram of an audio gain adjustment method according to an embodiment is schematically shown in fig. 8;
A schematic diagram of the calculation of focus distance information according to an embodiment is exemplarily shown in fig. 9;
a flow diagram of a video chat method in accordance with embodiments is illustrated in fig. 10.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of exemplary embodiments of the present application more apparent, the technical solutions of exemplary embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present application, and it is apparent that the described exemplary embodiments are only some embodiments of the present application, not all embodiments.
The display terminal of the present application includes at least two system-on-chip chips, and for ease of understanding, a multi-chip structure of the display terminal will be described herein.
For convenience of use, various external device interfaces are usually provided on the display device, so as to connect different peripheral devices or cables to realize corresponding functions. When the high-definition camera is connected to the interface of the display device, if the hardware system of the display device does not have the hardware interface of the high-pixel camera for receiving the source code, the data received by the camera cannot be presented on the display screen of the display device.
Also, due to the hardware structure, the hardware system of the conventional display device only supports one path of hard decoding resource, and usually only supports video decoding with a resolution of 4K at maximum, so when video chat while watching the network television is to be implemented, in order not to reduce the definition of the network video picture, it is necessary to decode the network video using the hard decoding resource (typically, GPU in the hardware system), and in this case, only the video chat picture can be processed in such a way that the video is soft decoded by a general processor (e.g. CPU) in the hardware system.
The soft decoding is adopted to process the video chat pictures, so that the data processing load of the CPU is greatly increased, and when the data processing load of the CPU is too heavy, the problems of picture blocking or unsmooth can occur. Furthermore, due to the data processing capability of the CPU, when the video chat frame is processed by adopting the soft decoding of the CPU, the multi-channel video call cannot be realized, and when the user wants to perform video chat with a plurality of other users at the same time in the same chat scene, the situation of access blocking occurs.
Based on the above-mentioned aspects, to overcome the above-mentioned drawbacks, the present application discloses a dual hardware system architecture to implement multiple video chat data (at least one local video).
The concept of the present application will be described with reference to the accompanying drawings. It should be noted that the following descriptions of the concepts are only for making the content of the present application easier to understand, and do not represent a limitation on the protection 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 function associated with that element.
The term "remote control" as used in the various embodiments of the present application refers to a component of an electronic device (such as a display device as disclosed herein) that can typically wirelessly control the electronic device over a relatively short range of distances. The assembly may be connected to the electronic device generally 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 a general remote control device with a touch screen user interface.
The term "gesture" as used in embodiments of the present application refers to a user's behavior through a change in hand or motion of the hand, etc., for expressing an intended idea, action, purpose, and/or result.
The term "hardware system" as used in embodiments of the present application may refer to a physical component comprising mechanical, optical, electrical, magnetic devices such as integrated circuits (Integrated Circuit, ICs), printed circuit boards (Printed circuit board, PCBs) with computing, control, storage, input and output functions. In various embodiments of the present application, the hardware system may also be generally referred to as a motherboard (or chip).
A schematic diagram of an operation scenario between a display device and a control apparatus according to an embodiment is exemplarily shown in fig. 1. As shown in fig. 1, a user may operate the display apparatus 200 by controlling the device 100.
The control device 100 may be a remote controller 100A, which may communicate with the display device 200 through infrared protocol communication, bluetooth protocol communication, zigBee protocol communication, or other short-range communication, and is used to control the display device 200 through wireless or other wired modes. The user may control the display device 200 by inputting user instructions through keys on a remote control, voice input, control panel input, etc. Such as: the user can input corresponding control instructions through volume up-down keys, channel control keys, up/down/left/right movement keys, voice input keys, menu keys, on-off keys, etc. on the remote controller to realize the functions of the control display device 200.
The control apparatus 100 may also be a smart device, such as a mobile terminal 100B, a tablet, a computer, a notebook, etc., which may communicate with the display device 200 through a local area network (LAN, local Area Network), a wide area network (WAN, wide Area Network), a wireless local area network ((WLAN, wireless Local Area Network) or other networks, and control the display device 200 through an application program corresponding to the display device 200.
By way of example, both the mobile terminal 100B and the display device 200 may be provided with software applications, so that connection communication between the two may be implemented through a network communication protocol, thereby achieving the purpose of one-to-one control operation and data communication. Such as: the mobile terminal 100B and the display device 200 can be made to establish a control instruction protocol, the remote control keyboard is synchronized to the mobile terminal 100B, and the functions of controlling the display device 200 are realized by controlling the user interface on the mobile terminal 100B; the audio/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 device 200 may also be in data communication with the server 300 through a variety of communication means. In various embodiments of the present application, display device 200 may be allowed to communicate with server 300 via a local area network, wireless local area network, or other network. The server 300 may provide various contents and interactions to the display device 200.
By way of example, the display device 200 receives software program updates by sending and receiving information, and electronic program guide (EPG, electronic Program Guide) interactions, or accesses a remotely stored digital media library. The servers 300 may be one group, may be multiple groups, and may be one or more types of servers. Other web service content such as video on demand and advertising services are provided through the server 300.
The display device 200, in one aspect, may be a liquid crystal display, OLED (Organic Light Emitting Diode) display, projection display device; in another aspect, the display device may be a smart television or a display system of a display and a set-top box. The particular display device type, size, resolution, etc. are not limited, and those skilled in the art will appreciate that the display device 200 may be subject to some changes in performance and configuration as desired.
The display device 200 may additionally provide an intelligent network television function of a computer support function in addition to the broadcast receiving television function. Examples include web tv, smart tv, internet Protocol Tv (IPTV), etc. In some embodiments, the display device may not have broadcast receiving television functionality.
As shown in fig. 1, a camera may be connected to or disposed on the display device, so as to present a picture surface captured 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 in a full screen, a half screen or any optional area on the display device.
As an optional connection mode, the camera is connected with the display back shell through the connecting plate, is fixedly arranged in the middle of the upper side of the display back shell, and can be fixedly arranged at any position of the display back shell in a mountable mode, so that an image acquisition area of the camera can be prevented from being blocked by the back shell, for example, the display orientation of the image acquisition area is the same as that of display equipment.
As another alternative connection mode, the camera is connected with the display back shell in a liftable manner through a connection plate or other conceivable connectors, and a lifting motor is installed on the connectors, so that when a user needs to use the camera or has an application program to use the camera, the camera is lifted out of the display, and when the user does not need to use the camera, the camera can be embedded behind the back shell so as to protect the camera from damage.
As an embodiment, the camera adopted by the application can be 1600 ten thousand pixels so as to achieve the purpose of ultra-high definition display. In practical 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 in different application scenes of the display device can be fused in a plurality of different modes, so that the function which cannot be realized by the traditional display device is achieved.
For example, 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 a background picture over which a window of video chat is displayed. The function is visual and can be called as 'chat while watching'.
Optionally, in the scene of "watch while chat", at least one video chat is performed across terminals while live video or network video is being watched.
In another example, a user may conduct a video chat with at least one other user while entering the educational application study. For example, students may be able to achieve remote interaction with teachers while learning content in educational applications. The function is visual and can be called as 'learning while boring'.
In another example, a user may conduct a video chat with a player entering a game while playing a card game. For example, a player may enable remote interaction with other players when entering a gaming application to participate in a game. The function is visual and can be called 'play while watching'.
Optionally, the game scene is fused with the video picture, the portrait in the video picture is scratched, and the portrait is displayed in the game picture, so that the user experience is improved.
Optionally, in somatosensory games (such as ball playing, boxing, running, dancing, etc.), the body gestures and actions are obtained through the camera, limb detection and tracking, detection of key point data of the bones of the body, and then the body gestures and actions are fused with animation in the games, so that the games of scenes such as sports, dance, etc. are realized.
In another example, a user may interact with at least one other user in a karaoke application, video and voice. The function is visual and can be called 'watch and sing'. Preferably, when at least one user enters the application in the chat scene, a plurality of users can jointly complete recording of one song.
In another example, the user may open the camera locally to take pictures and video, and the function may be referred to as "looking at the mirror".
In other examples, more functions may be added or the above functions may be reduced. The function of the display device is not particularly limited by the present application.
A block diagram of the configuration of the control apparatus 100 according to the exemplary embodiment is exemplarily shown in fig. 2. 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 to convert the operation instruction into an instruction recognizable and responsive to the display device 200, and to perform an interaction between the user and the display device 200. Such as: the user responds to the channel addition and subtraction operation by operating the channel addition and subtraction key on the control apparatus 100.
In some embodiments, the control apparatus 100 may be a smart device. Such as: the control apparatus 100 may install various applications for controlling the display device 200 according to user's needs.
In some embodiments, as shown in fig. 1, a mobile terminal 100B or other intelligent electronic device may function similarly to the control apparatus 100 after installing an application that manipulates the display device 200. Such as: the user may implement the functions of the physical keys of the control apparatus 100 by installing an application, various function keys or virtual buttons of a graphical user interface available on the mobile terminal 100B or other intelligent electronic device.
The controller 110 includes a processor 112, RAM113 and ROM114, a communication interface, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as the communication collaboration among the internal components and the external and internal data processing functions.
The communicator 130 performs communication of control signals and data signals with the display device 200 under the control of the controller 110. Such as: the received user input signal is transmitted to the display device 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, keys 144, etc. Such as: the user can implement a user instruction input function through actions such as voice, touch, gesture, press, and the like, and the input interface converts a received analog signal into a digital signal and converts the digital signal into a corresponding instruction signal, and sends the corresponding instruction signal to the display device 200.
The output interface includes an interface that transmits the received user instruction to the display device 200. In some embodiments, an infrared interface may be used, as well as 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. And the following steps: when the radio frequency signal interface is used, the user input instruction is converted into a digital signal, and then the digital signal is modulated according to a radio frequency control signal modulation protocol and then transmitted to the display device 200 through the radio frequency transmission terminal.
In some embodiments, the control device 100 includes at least one of a communicator 130 and an output interface. The control device 100 is provided with a communicator 130 such as: the modules such as WIFI, bluetooth, NFC, etc. may send the user input instruction to the display device 200 through the WIFI protocol, or the bluetooth protocol, or the NFC protocol code.
A memory 190 for storing various operation programs, data and applications for driving and controlling the control device 100 under the control of the controller 110. The memory 190 may store various control signal instructions input by a user.
A power supply 180 for providing operating power support for the various elements of the control device 100 under the control of the controller 110. May be a battery and associated control circuitry.
A hardware configuration block diagram of a hardware system in the display device 200 according to an exemplary embodiment is exemplarily shown in fig. 3.
When the dual hardware system architecture is adopted, the organization relationship of the hardware system can be shown in fig. 3. For convenience of description, one hardware system in the dual hardware system architecture is referred to as a first hardware system or a system, a chip, and the other hardware system is referred to as a second hardware system or N system, N chip. The A chip comprises a controller of the A chip and various modules connected with the controller of the A chip through various interfaces, and the N chip comprises a controller of the N chip and various modules connected with the controller of the N chip through various interfaces. The a chip and the N chip may be respectively provided with a relatively independent operating system, and the operating system of the a chip and the operating system of the N chip may communicate with each other through a communication protocol, which is exemplary: the frame work layer of the operating system of the a-chip and the frame work layer of the operating system of the N-chip may communicate for command and data transmission, such that there are two independent but interrelated subsystems 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 types of the interface between the a chip and the N chip may include General-purpose input/output (GPIO), USB interface, HDMI interface, UART interface, and the like. One or more of these interfaces may be used between the a-chip and the N-chip for communication or power transfer. For example, as shown in fig. 3, in the dual hardware system architecture, an external power source (power) may supply power to the N chip, while the a chip may not be supplied with power from the external power source, but may be supplied with power from the N chip.
In addition to the interface for connection with the N chip, the a chip may also contain an interface for connection with other devices or components, such as an MIPI interface for connection with a Camera (Camera), a bluetooth interface, etc., as shown in fig. 3.
Similarly, the N chip may include, in addition to an interface for connecting with the N chip, a VBY interface for connecting with the display TCON (Timer Control Register), an i2S interface for connecting with a power Amplifier (AMP) and a Speaker (Speaker); and IR/Key interfaces, USB interfaces, wifi interfaces, bluetooth interfaces, HDMI interfaces, tuner interfaces, etc.
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 is not meant to limit the present application. In practical applications, both hardware systems may include more or fewer hardware or interfaces as desired.
A hardware architecture block diagram 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 modem 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, a power supply. In other embodiments the N-chip may also include more or fewer modules.
The modem 220 is configured to perform modulation and demodulation processes such as amplification, mixing, and resonance on a broadcast television signal received by 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 broadcasting system of the television signal, the signal paths of the modem 220 may be various, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting, internet broadcasting, or the like; according to different modulation types, the signal adjustment mode can be a digital modulation mode or an analog modulation mode; and the modem 220 may demodulate analog signals and/or digital signals according to the kind of received television signals.
The tuning demodulator 220 is further configured to respond to the user-selected television channel frequency and the television signal carried by the frequency according to the user selection and controlled by the controller 210.
In other exemplary embodiments, the modem 220 may also be in an external device, such as an external set-top box, or the like. In this way, the set-top box outputs the television audio and video signals after modulation and demodulation, and inputs the television audio and video signals to the display device 200 through the external device interface 250.
Communicator 230 is a component for communicating with external devices or external servers according to various communication protocol types. For example: 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 device 200 may establish a connection of control signals and data signals with an external control device or a content providing device 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 that provides data transfer between the N-chip controller 210 and the a-chip and other external devices. The external device interface may be connected to an external device 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., a moving image), an audio signal (e.g., music), additional information (e.g., an EPG), etc., of the external device.
Among other things, the external device interface 250 may include: any one or more of 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 present application is not limited in the number and type of external device interfaces.
The controller 210 controls the operation of the display device 200 and responds to user operations 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 are connected to the graphics processor 216, the CPU processor 212, and the communication interface 218 via buses.
A ROM213 for storing instructions for various system starts. When the power of the display device 200 starts to be started when the power-on signal is received, the CPU processor 212 executes a system start instruction in the ROM, and copies the operating system stored in the memory 290 into the RAM214 to start to run the start-up operating system. When the operating system is started, the CPU processor 212 copies various applications in the memory 290 to the RAM214, and then starts running the various applications.
A graphics processor 216 for generating various graphical objects, such as: icons, operation menus, user input instruction display graphics, and the like. The device comprises an arithmetic unit, wherein the arithmetic unit is used for receiving various interaction instructions input by a user to carry out operation and displaying various objects according to display attributes. And a renderer that generates various objects based on the results of the operator, and displays the results of rendering on the display 280.
CPU processor 212 is operative to execute 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 multiple processors. One of the plurality of processors may include one main processor, and a plurality of or one sub-processor. A main processor for performing some operations of the display apparatus 200 in the pre-power-up mode and/or displaying a picture in the normal mode. A plurality of or a sub-processor for performing an operation in a standby mode or the like.
The communication interfaces may include first interface 218-1 through 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 to select 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: operations to connect to a hyperlink page, document, image, etc., or operations to execute a program corresponding to an icon are displayed. The user command for selecting the UI object may be an input command through various input means (e.g., mouse, keyboard, touch pad, etc.) connected to the display device 200 or a voice command corresponding to a voice uttered by the user.
Memory 290 includes memory for storing various software modules for driving and controlling display device 200. Such as: various software modules stored in memory 290, including: a basic module, a detection module, a communication module, a display control module, a browser module, various service modules and the like.
The base module is a bottom software module for signal communication between the various hardware in the display device 200 and for sending processing and control signals to the upper modules. The detection module is a management module 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 can be used for playing multimedia image content, UI interface and other information. The communication module is used for controlling and data communication with external equipment. The browser module is a module for performing data communication between the browsing servers. The service module is used for providing various services and various application programs.
Meanwhile, the memory 290 is also used to store received external data and user data, images of various items in various user interfaces, visual effect maps of focus objects, and the like.
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. Illustratively, the control device (e.g., mobile terminal or remote control) may send input signals such as power switch signals, channel selection signals, volume adjustment signals, etc., input by the user to the user input interface, which may then be forwarded to the controller; alternatively, the control device may receive an output signal such as audio, video, or data, which is output from the user input interface via the controller, and display the received output signal or output the received output signal in the form of audio or vibration.
In some embodiments, a user may input a user command through 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 recognizes the sound or gesture through the sensor to receive the user input command.
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 composition according to a standard codec protocol of an input signal, so as to obtain a video signal that is directly displayed or played on the display 280.
The video processor 260-1, by way of example, includes a demultiplexing module, a video decoding module, an image compositing module, a frame rate conversion module, a display formatting module, and the like.
The demultiplexing module is used for demultiplexing the input audio/video data stream, such as the input MPEG-2, and demultiplexes the input audio/video data stream into video signals, audio signals and the like.
And the video decoding module is used for processing the demultiplexed video signal, including decoding, scaling and the like.
And an image synthesis module, such as an image synthesizer, for performing superposition mixing processing on the graphic generator and the video image after the scaling processing according to the GUI signal input by the user or generated by the graphic generator, so as to generate an image signal for display.
A frame rate conversion module, configured to convert a frame rate of an input video, such as converting a frame rate of an input 24Hz, 25Hz, 30Hz, 60Hz video to a frame rate of 60Hz, 120Hz, or 240Hz, 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 carried out in a usual format such as a frame inserting 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 such as a display, for example, format converting the signal output by the frame rate conversion module to output an RGB data signal.
A display 280 for receiving image signals from the video processor 260-1 for displaying video content and images and a menu manipulation interface. The display 280 includes a display assembly for presenting pictures and a drive assembly for driving the display of images. The video content may be displayed from a video in a broadcast signal received by the modem 220 or may be displayed from a video input from a communicator or an external device interface. And a display 220 simultaneously displaying a user manipulation interface UI generated in the display device 200 and used to control the display device 200.
And, depending on the type of display 280, a drive assembly for driving the display. Alternatively, if the display 280 is a projection display, a projection device and projection screen may be included.
The audio processor 260-2 is configured to receive the audio signal, decompress and decode according to the standard codec protocol of the input signal, and perform audio data processing such as noise reduction, digital-to-analog conversion, and amplification processing, so as to obtain an audio signal that can be played in the speaker 272.
An audio output interface 270 for receiving the audio signal output from the audio processor 260-2 under the control of the controller 210, where the audio output interface may include a speaker 272 or an external audio output terminal 274 for outputting to a generating device of an external device, such as: external sound terminals or earphone output terminals, etc.
In other exemplary embodiments, video processor 260-1 may include one or more chip components. The audio processor 260-2 may also include one or more chip components.
And, in other exemplary embodiments, the video processor 260-1 and the audio processor 260-2 may be separate chips or integrated with the controller 210 in one or more chips.
And a power supply for providing power supply support for the display device 200 with power inputted from an external power supply under the control of the controller 210. The power supply may include a built-in power circuit installed inside the display apparatus 200, or may be a power supply installed outside the display apparatus 200, such as a power interface providing an external power supply in the display apparatus 200.
Similar to the N chip, the A chip may include a controller 310, a communicator 330, a detector 340, and a memory 390, as shown in FIG. 4. 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 external devices or external servers 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 a-chip communicator 330 and the N-chip communicator 230 also interact with each other. For example, the WiFi module 231 in the N-chip hardware system is used to connect to an external network, and generate network communication with an external server, etc. The WiFi module 331 in the a-chip hardware system is used for connecting to the WiFi module 231 of the N-chip, and is not directly connected to an external network or the like, and the a-chip is connected to the external network through the N-chip. Thus, 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 the external environment or interacting with the outside. The detector 340 may include a light receiver 342, a sensor for capturing ambient light intensity, a display parameter change that may be adapted by capturing ambient light, etc.; the system can also comprise an image collector 341, such as a camera, a video camera and the like, which can be used for collecting external environment scenes, collecting attributes of a user or interacting gestures with the user, adaptively changing display parameters and identifying the gestures of the user so as to realize the interaction function with the user.
An external device interface 350 provides components for data transfer between the controller 310 and the N-chip or other external devices. The external device interface may be connected with external apparatuses such as a set-top box, a game device, a notebook computer, and the like in a wired/wireless manner.
The controller 310 controls the operation of the display device 200 and responds to user operations by running various software control programs stored on the memory 390 (e.g., with an installed third party application, etc.), as well as interactions 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 RAM314, and the graphics processor 316, CPU processor 312, and communication interface 318 are connected by a bus.
A ROM313 for storing instructions for various system starts. The CPU processor 312 runs the system boot instructions in ROM and copies the operating system stored in the memory 390 into the RAM314 to begin running the boot operating system. When the operating system is started, the CPU processor 312 copies various applications in the memory 390 to the RAM314, and then starts running the various applications.
The CPU processor 312 is configured to execute instructions of an operating system and applications stored in the memory 390, and to communicate with the N chip, transmit and interact with signals, data, instructions, etc., and execute various applications, 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 first interface 318-1 through nth interface 318-n. These interfaces may be network interfaces connected to external devices via a network, or network interfaces connected to an 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 to select 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 graphical objects, such as: icons, operation menus, user input instruction display graphics, and the like. The device comprises an arithmetic unit, wherein the arithmetic unit is used for receiving various interaction instructions input by a user to carry out operation and displaying various objects according to display attributes. And a renderer that generates various objects based on the results of the operator, and displays the results of rendering 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. By 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 graphical object when the user makes a user input instruction at the interface of application 1 and within application 1. When the user is at the interface of application 2 and the instruction of the user input is made within application 2, a graphical object is generated by the graphics processor 216 of the N-chip.
A functional configuration diagram of a display device according to an exemplary embodiment is exemplarily shown in fig. 5.
As shown in fig. 5, the a-chip memory 390 and the N-chip memory 290 are used to store an operating system, application programs, 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 a-chip controller 310 and the N-chip controller 210. Memory 390 of the a-chip and memory 290 of the N-chip may include volatile and/or nonvolatile memory.
For the N chip, the memory 290 is specifically used for storing an operation program for driving the controller 210 in the display device 200, and storing various application programs built in the display device 200, various application programs downloaded by a user from an external device, various graphic user interfaces related to the application programs, various objects related to the graphic user interfaces, user data information, and various internal data supporting the application programs. 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, as well as other user data.
Memory 290 is specifically used to store drivers and related data for video processor 260-1 and audio processor 260-2, display 280, communication interface 230, modem 220, input/output interfaces, and the like.
In some embodiments, memory 290 may store software and/or programs, the software programs used to represent 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 (such as the middleware, APIs, or application programs), and the kernel may provide interfaces to allow the middleware and APIs, or applications to access the controller to implement control or management of system resources.
By way of example, the memory 290 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 executes various software programs in the memory 290 such as: broadcast television signal receiving and demodulating functions, television channel selection control functions, volume selection control functions, image control functions, display control functions, audio control functions, external instruction recognition functions, communication control functions, optical signal receiving functions, power control functions, software control platforms supporting various functions, browser functions and other various functions.
Memory 390 includes storage for various software modules for driving and controlling display device 200. Such as: various software modules stored in memory 390, including: 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, the relevant portions will be referred to as the memory 290, and will not be described herein.
By way of example, 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 executes various software programs in the memory 290 such as: image control function, display control function, audio control function, external instruction recognition function, communication control function, optical signal receiving function, power control function, software control platform supporting various functions, browser function and other various functions.
Differentially, the N-chip external instruction recognition module 2907 and the a-chip external instruction recognition module 3907 may recognize different instructions.
For example, since the image receiving device such as a camera is connected to the a chip, the external command recognition module 3907 of the a chip may include a graphic recognition module 3907-1, where a graphic database is stored in the graphic recognition module 3907-1, and when the camera receives an external graphic command, the camera performs a correspondence with the command in the graphic database to perform command control on the display device. Since the voice receiving device and the remote controller are connected with the N chip, the external command recognition module 2907 of the N chip may include a voice recognition module 2907-2, where a voice database is stored in the voice recognition module 2907-2, and when the voice receiving device receives an external voice command or when the voice receiving device receives an external voice command, the voice receiving device performs a corresponding relationship with the command in the voice database, so as to perform command control on the display device. Similarly, the control device 100 such as a remote controller is connected to the N chip, and the key instruction recognition module 2907-3 performs instruction interaction with the control device 100.
A block diagram of the configuration of the software system in the display device 200 according to an exemplary embodiment is schematically shown in fig. 6 a.
For an N-chip, as shown in fig. 6a, operating system 2911 includes execution 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 display device hardware resources and to serve other programs or software code.
In other embodiments, portions of the operating system kernel may contain one or more device drivers, which may be a set of software code in the operating system that helps operate or control the devices or hardware associated with the display device. The driver may contain code to operate video, audio and/or other multimedia components. Examples include a display, camera, flash, wiFi, and audio drivers.
Wherein, accessibility module 2911-1 is configured to modify or access an application program to realize accessibility of the application program and operability of display content thereof.
The communication module 2911-2 is used for connecting with other peripheral devices via related communication interfaces and communication networks.
User interface module 2911-3 is configured to provide an object for displaying a user interface for access by each application program, so as to implement user operability.
Control applications 2911-4 are used to control process management, including runtime applications, and the like.
The event delivery system 2914 may be implemented within the operating system 2911 or in the application 2912. In some embodiments, one aspect is implemented within the operating system 2911, while the application 2912 is implemented to monitor various user input events, and to refer to a process program that implements one or more sets of predefined operations in response to recognition results of various events or sub-events, based on the various events.
The event monitoring module 2914-1 is configured to monitor a user input interface to input an event or a sub-event.
The event recognition module 2914-2 is configured to input definitions of various events to various user input interfaces, recognize various events or sub-events, and transmit them to a process for executing one or more corresponding sets of processes.
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 (such as the control apparatus 100). Such as: various sub-events are input through voice, gesture input sub-events of gesture recognition, sub-events of remote control key instruction input of a control device and the like. By way of example, one or more sub-events in the remote control may include a variety of forms including, but not limited to, one or a combination of key press up/down/left/right/, ok key, key press, etc. And operations of non-physical keys, such as movement, holding, releasing, etc.
The interface layout management module 2913 directly or indirectly receives the user input events or sub-events from the event transmission system 2914, and is used for updating the layout of the user interface, including but not limited to the positions of the controls or sub-controls in the interface, and various execution operations related to the interface layout, such as the size or position of the container, the level, and the like.
Since the functions of the operating system 3911 of the a chip and the operating system 2911 of the N chip are similar, the relevant parts only need to be referred to the operating system 2911, and the description thereof will be omitted.
As shown in fig. 6b, the application layer of the display device contains various applications that may be executed on the display device 200.
The N-chip application layer 2912 may include, but is not limited to, one or more applications such as: video on demand applications, application centers, gaming applications, etc. 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, etc. It should be noted that what application programs are respectively contained on the a chip and the N chip are determined according to the operating system and other designs, and the invention does not need to specifically limit and divide the application programs contained on the a chip and the N chip.
Live television applications can provide live television through different signal sources. For example, a live television application may provide television signals using inputs from cable television, radio broadcast, 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.
Video on demand applications may provide video from different storage sources. Unlike live television applications, video-on-demand provides video displays from some storage sources. For example, video-on-demand may come from the server side of cloud storage, from a local hard disk storage containing stored video programs.
The media center application may provide various applications for playing multimedia content. For example, a media center may be a different service than live television or video on demand, and a user may access various images or audio through a media center application.
An application center may be provided to store various applications. The application may be a game, an application, or some other application associated with a computer system or other device but operable on a display device. The application center may obtain these applications from different sources, store them in local storage, and then be run 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 an item is selected, the position of the selector being movable by user input to change selection of a different item.
It should be noted that the multiple view display areas may present different levels of display images. For example, the first view display region may present video chat item content and the second view display region may present application layer item content (e.g., web page video, VOD presentation, application screen, etc.).
Optionally, the presentation of different view display areas has priority difference, 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 the 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 affected.
The same level of display may be presented, in which case the selector may switch between the first view display region and the second view display region, and the size and position of the second view display region may change as the size and position of the first view display region changes.
Since separate operating systems may be installed in the a chip and the N chip, there are two independent but interrelated subsystems in the display device 200. For example, android and various types of APP can be independently installed on the A chip and the N chip, so that each chip can achieve a certain function, and the A chip and the N chip can cooperatively achieve 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 intelligent operation on the image obtained by the camera; the microphone is connected with the main chip, and the main chip carries out gain processing on sound collected by the microphone. When the display device provided by the embodiment of the application is used for video chat, the auxiliary chip acquires video images through the camera, and the human intelligent application technologies such as face recognition, action (lip shape) recognition and the like are utilized, the picture in the video chat process is not limited to a picture with a fixed focal length, but can be a variable-focus video focused by a target speaker through the combination of face recognition and lip shape recognition, so that no matter which corner of a person is or how far from the camera is, the automatic face focusing can be realized, namely the face can be kept unchanged in a display frame at the opposite end of the display device. When video chat is carried out by the display device provided by the embodiment of the application, the display size of the face can be unchanged along with the change of the distance between the 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 also changed, so that the sound can have certain stability while the display size of the face is unchanged.
Fig. 8 is a flow chart of an audio gain adjustment method according to an embodiment of the present application. As shown in fig. 8, the audio gain adjustment method provided by the embodiment of the application includes:
s101: focal length information corresponding to a current image in video chat is obtained.
In video chat, the auxiliary chip obtains images through the camera, and the image acquisition is automatic focusing on the face. In the embodiment of the application, the automatic focusing of the face is realized by a phase method. The phase method focusing refers to judging whether focusing is performed or not by the time when the light beam reaches the photosensitive element, namely, the phase offset. During automatic focusing, a grid plate which is formed by alternately and parallelly arranging light-transmitting and light-non-transmitting lines is placed at the position of the photosensitive element by the camera, and two photosensitive elements are symmetrically placed at the proper position behind the grid plate along the optical axis.
During focusing, the grid plate moves up and down along the vertical direction of the optical axis, and when the focusing surface is overlapped with the position of the network plate (namely focusing), the light transmitted through the grid plate can reach two light receiving elements behind the plate at the same time; when defocusing (front focus or back focus), the two light beams can only reach the light receiving element in tandem, and phase difference exists between output signals. Because the wave peak positions of the front focus and the back focus are different, the camera can rapidly judge that the camera should deviate to that side, and the camera can focus without moving back and forth for a plurality of times like contrast. The specific calculation principle is shown in fig. 9, and will not be described herein.
In some embodiments, the image transmitted to the opposite terminal is a cropped face image, that is, because of the auto-focus, no matter what distance the person is from the television, the face in the acquired image is transmitted to the opposite terminal locally, and the opposite terminal 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 end cannot change the distance between the person and the television, but the sound received by the opposite end can change along with the change of the distance between the local person and the television.
When the camera of the auxiliary chip collects images, the camera can automatically focus in real time and output focal length information in real time. In image processing, the definition and focusing degree of an image are determined by the quantity of high-frequency components of the image, if the quantity of the high-frequency components is large, the image is clear, otherwise, the image is blurred, the focal length needs to be adjusted to achieve the definition, and methods for judging the definition of the image include Fourier transform (FFT) and Discrete Cosine Transform (DCT); each frame of Image outputs a value, such as an Image distance (Image distance), that characterizes whether the Image is sharp. Specifically, in the embodiment of the present application, the Image distance calculation method includes a high-frequency component method, a smoothing method, a threshold integration method, a gray level difference method, a laplace Image energy function, and the like.
In order to rapidly output focal length information corresponding to a current image, an improved gray level difference method can be adopted as an image definition evaluation function, namely, the sum of squares of brightness value differences of all pixels of one image to surrounding similar pixels is taken as an image focusing evaluation function, and values of adjacent same-field image evaluation functions are calculated, wherein the focusing evaluation function is as follows:
f (x, y) is expressed as the luminance value of the x-th row and y-th column pixels. The algorithm compares the left side and the upper side of two adjacent pixels (F (x, y)) by selecting, when the Image is focused clearly, F (x, y) is the largest, namely the corresponding Image distance value is the largest, the Image distance is calculated in real time by adaptively adjusting the focal length step length of the lens, and when the relative maximum is reached, automatic focusing is completed, and corresponding focal length information is output.
S102: and obtaining the gain of the microphone according to the focal length information.
The change information of the Image distance reflects the change information of the focal length of the current lens, so that the change information can correspond to the change of the distance between the current user and the camera of the display device, namely the change condition of the distance between the current user and the last call. In general, when the Image distance becomes large, it means that the distance between the current user and the display device (camera) becomes large, and if the Image distance becomes small, it means that the distance between the current user and the display device (camera) becomes small. Therefore, the focal length corresponding to the maximum Image distance is found out according to the Image distance and the variation condition thereof, namely the focal length information corresponding to the current Image. 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 obtain the microphone gain, and performing gain processing on the collected 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 equipment (camera) and the corresponding focal length information are counted, and a corresponding list of the microphone gain and the focal length information is established by taking a checked value. When the focal length information corresponding to the current image in the video chat is determined, the microphone gain can be obtained according to the microphone gain and the focal length information corresponding list.
A list of microphone gain versus focus distance information correspondence is established based on empirical values, as shown in table 1, where table 1 is given by way of example only and not as a limitation of the present application.
Table 1:
corresponding distance Focal length information Microphone gain
3 meters 0.3 mm 0dB
4 m 0.4 mm 10dB
2 meters 0.2 mm -10dB
2.5 meters 0.25 mm -8dB
3.5 meters 0.35 mm 8dB
Therefore, when the focal length information is acquired to be 0.2 mm, then according to the microphone gain and focal length information correspondence list shown in table 1, a corresponding microphone gain of-10 dB can be obtained, and then gain processing is performed on the acquired corresponding audio data by the obtained microphone gain.
If the acquired focal length information is not in the table, calculating the corresponding microphone gain by interpolation. For example, the obtained focal length information is 0.375 mm, and the microphone gain can 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 9dB.
In addition, 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 Image distance can be counted, and a function model of the microphone gain and the focal length information can be established. When focal length information corresponding to a current image in video chat is determined, a function model of microphone gain and focal length information is obtained; and obtaining 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 application, in order to facilitate the acquisition of the microphone gain, the focal length information can be acquired by adopting an adaptive method according to the focal length information.
S103: and adjusting the audio received by the microphone according to the acquired microphone gain value.
The microphone gain obtained through the focal length information is used for adjusting the audio received by the microphone, namely the obtained microphone gain value is used for carrying out gain processing on the audio received by the microphone, so that the stability of the size of the audio sound received by the microphone is ensured.
The audio gain adjusting method provided by the application comprises the following steps: focal length information of a current video image in video chat is acquired, and microphone gain is acquired according to the focal length information. In the process of video chat through variable-focus processing of the intelligent 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 chat by obtaining the microphone gain. In the application, the microphone gain is determined by processing the video image in the video chat by utilizing the focal length information, so that the gain processing of the audio data based on the distance between the person and the microphone in the video chat process is realized, the fluctuation of the sound volume locally transmitted to the opposite terminal caused by the change of the distance between the person and the television is reduced, the sound volume locally transmitted 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 chat method. Fig. 10 is a schematic flow chart of a video chat method according to an embodiment of the application.
As shown in fig. 10, the video chat method provided by the embodiment of the application includes:
s201: the auxiliary chip transmits the video image after the automatic zooming process 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 audio corresponding to the video image according to the microphone gain so as to reduce fluctuation of audio volume locally sent to an opposite terminal.
S204: and the main chip synchronizes the audio after gain processing with the video image and transmits the synchronized audio and video to a display frame at the opposite end.
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 video image, and outputs 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 network, serial port, USB and HDMI communication modes are 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, USB or HDMI. The auxiliary chip may dynamically select any one of a network, a serial port, a USB and an HDMI based on the stability of communication between the auxiliary chip and the main chip, which is not specifically limited herein.
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, USB or HDMI, the main chip receives the video image and the focal length information corresponding to the video image.
In some embodiments, the video image after the auto-zoom process is an image cropped from the view acquired by the camera according to the focal length. In some embodiments, the video image after the auto-zoom process is a face image cut 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 microphone collects audio information in synchronization with the camera collects video images. 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 microphone gain according to the focal length information corresponding to the video image, and then performing gain processing on the acquired audio information by determining the obtained microphone gain to obtain the audio after gain processing.
After gain processing is carried out on the acquired audio information, the main chip synchronizes the audio after gain processing with the video image, audio-video synchronous video chat data are obtained, the audio-video synchronous video chat data are transmitted to a display frame of the opposite end, and then video chat is completed.
The video chat method provided by the embodiment of the application realizes that the main chip and the auxiliary chip cooperate with each other to solve the problem that a single computing chip needs to support the instant communication function (video encoding and decoding and transmission) of video chat and also needs to carry out the computing pressure of a real-time artificial intelligent algorithm (face recognition and lip recognition). Meanwhile, in the video chat method provided by the embodiment of the application, in the video chat process of carrying out variable-focus processing through the intelligent 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 chat by obtaining the microphone gain, so that gain processing is carried out on the audio data based on the distance between people and microphones in the video chat process, the stability of sound in the video chat process is ensured, namely real-time zooming can be carried out to focus a face in the video process, and the sound can be stabilized and smoothed in real time.
In order to facilitate obtaining the microphone gain, in the video chat method provided by the embodiment of the present application, the obtaining the microphone gain by the main chip according to the focal length information includes:
the main chip acquires a list corresponding to microphone gain and focusing distance information;
And searching a list corresponding to the focal length information and the microphone gain according to the focal length information, and obtaining the microphone gain.
Or, in order to facilitate obtaining the microphone gain, in the video chat method provided by 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 obtaining the microphone gain according to the focal length information and a function model combining the microphone gain and the focal length information.
The specific step of obtaining the microphone gain through the microphone gain and focus distance information correspondence list or the function model of the microphone gain and focus distance information can be referred to the audio gain adjustment method provided in the above embodiment, and will not be described herein. The method for obtaining the microphone gain in the video chat provided by the embodiment of the application is not limited to obtaining through a corresponding list of the microphone gain and focus distance information or a function model of the microphone gain and focus distance information, and can also obtain the focus distance information by adopting an adaptive method.
Further, in the video chat method provided by the embodiment of the present application, the transmitting the focal length information corresponding to the video image to the master 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 last 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, by comparing the focal length information corresponding to the video image with the focal length information corresponding to the video image at the last moment, 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 last moment or not is judged, 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 last 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 adjusting 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, wherein the display is configured to display a user interface;
A controller in communicative connection with the display, the controller configured to perform presenting a 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 modes, wherein the main chip is configured to execute the audio gain adjustment method provided by the above embodiment; or alternatively, the process may be performed,
the primary chip and the secondary chip are configured to cooperatively execute the video chat method provided by the above embodiments.
The audio gain adjustment method and the video chat method refer to the above embodiments and other features related to the display device provided in the embodiments of the present application refer to the display device 200 provided in the above embodiments, and are not described herein again.
All other embodiments, which can be made by a person skilled in the art without inventive effort, based on the exemplary embodiments shown in the present application are intended to fall within the scope of the present application. Furthermore, while the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure may be separately implemented as a complete solution.
It should be understood that the terms "first," "second," "third," and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate, such as where appropriate, for example, implementations other than those illustrated or described in connection with the embodiments of the application.
Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (7)

1. A method of audio gain adjustment, the method comprising:
acquiring a user image through a camera in video chat, and automatically focusing the face of the user when the user image is acquired;
acquiring focal length information corresponding to a current image in video chat, wherein the focal length information is acquired according to the relative maximum value of an image distance corresponding to the current image, and the image distance is calculated according to the square sum of brightness value differences of any pixel and two adjacent pixels in the current image;
judging whether the focal length information corresponding to the current image is the same as the focal length information corresponding to the video image at the previous moment; when the focal length information corresponding to the current image is different from the focal length information corresponding to the video image at the previous moment, acquiring microphone gain according to the focal length information, wherein the size of the focal length information is in direct proportion to the size of the microphone gain;
and adjusting the audio received by the microphone according to the acquired microphone gain value.
2. The audio gain adjustment method of claim 1, wherein the obtaining the microphone gain from the focal length information comprises:
acquiring a list corresponding to microphone gain and focusing distance information;
And searching a list corresponding to the focal length information and the microphone gain according to the focal length information, and obtaining the microphone gain.
3. The audio gain adjustment method of claim 1, wherein the obtaining the microphone gain from the focal length information comprises:
acquiring a function model of microphone gain and focal length information;
and obtaining the microphone gain according to the focal length information and a function model combining the microphone gain and the focal length information.
4. A method of video chat, the method comprising:
the auxiliary chip transmits the video image after the automatic zooming treatment to a main chip, and transmits focal length information corresponding to the video image to the main chip, wherein the auxiliary chip calculates an image distance according to the square sum of brightness value differences of any pixel and two adjacent pixels in the video image, and acquires the focal length information according to the relative maximum value of the image distance; 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; transmitting the focal length information corresponding to the video image to a main chip 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;
The main chip receives the video image and the focal length information;
the main chip acquires microphone gain according to the focal length information, the size of the focal length information is in direct proportion to the size of the microphone gain, and carries out gain processing on audio corresponding to the video image according to the microphone gain so as to reduce fluctuation of audio volume locally sent to an opposite terminal;
and the main chip synchronizes the audio after gain processing with the video image and transmits the synchronized audio and video to a display frame at the opposite end.
5. The video chat method of claim 4, wherein the method further comprises: the main chip obtains microphone gain according to the focal length information, and the method comprises the following steps:
the main chip acquires a list corresponding to microphone gain and focusing distance information;
and searching a list corresponding to the focal length information and the microphone gain according to the focal length information, and obtaining the microphone gain.
6. The video chat method of claim 4, wherein the method further comprises: 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 obtaining the microphone gain according to the focal length information and a function model combining the microphone gain and the focal length information.
7. A display device, characterized by comprising:
a display configured to display a user interface;
a controller in communicative connection with the display, the controller configured to perform presenting a user interface:
a main chip connected to the display, and a sub chip connected to the main chip through at least one of network, serial port, USB and HDMI communication means, wherein the main chip is configured to perform the audio gain adjustment method of any one of claims 1 to 3; or alternatively, the process may be performed,
the primary and secondary chips are configured to cooperatively perform the video chat method of any of claims 4-6.
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