CN111641793A

CN111641793A - Analog television playing method and display equipment

Info

Publication number: CN111641793A
Application number: CN202010493756.XA
Authority: CN
Inventors: 焉为家
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-09-08

Abstract

The invention discloses an analog television playing method and display equipment, when a display plays a channel of an analog television, an automatic frequency control function preset by the display equipment is started, and the automatic frequency control function is configured as follows: and if a first frequency which enables the channel playing effect to be optimal is detected in a first frequency modulation range determined according to a reference frequency and a frequency offset allowable value corresponding to the channel, locking the channel at the first frequency. According to the method and the device, the user does not need to manually fine-tune the analog signal for many times, but the built-in frequency automatic control function of the display device is utilized, the first frequency is automatically detected, the channel is automatically locked at the first frequency to be played, the channel can be automatically and quickly optimally played, and the practical application experience of the user is improved.

Description

Analog television playing method and display equipment

Technical Field

The invention relates to the technical field of display equipment, in particular to a method for simulating television playing and display equipment.

Background

The signal transmission and processing method of the ATV (Analog TV ) is as follows: the signal transmitting terminal modulates a Composite Video Blanking and Sync (Composite Video Blanking synchronization) signal into a high-frequency analog signal and transmits the high-frequency analog signal to the display equipment terminal through an antenna or a cable; the display equipment terminal modulates the high-frequency analog signal into an intermediate-frequency analog signal, demodulates the intermediate-frequency analog signal, sends the demodulated video signal into a video processor, and sends the demodulated audio signal to an audio processor.

In practical application, the analog signal has weak anti-interference capability and is easily influenced by interference factors such as weather and terrain, so that abnormal display such as snowflakes may appear on a screen when a certain channel is played at a display device end, and the playing effect is influenced. In this regard, an ATV fine tuning function may be built in a general display device, and a user manually fine tunes the frequency of the analog signal, thereby optimizing the playing effect of the analog signal. However, this method mainly depends on manual operation of the user, and may be that the analog signal is just fine-tuned, and the next playing is unclear, and many fine-tuning operations are required until the playing effect satisfied by the user is achieved, so that the user experience is poor.

Disclosure of Invention

In order to solve the technical problem, the invention provides an analog television playing method and display equipment.

In a first aspect, the present invention provides a display device comprising:

a display;

a user interface for receiving user input;

a controller for performing:

starting an automatic frequency control function preset by a display device when a display starts to play a channel of an analog television, wherein the automatic frequency control function is configured to: and if a first frequency which enables the channel playing effect to be optimal is detected in a first frequency modulation range determined according to a reference frequency and a frequency offset allowable value corresponding to the channel, locking the channel at the first frequency.

In some embodiments, the controller is further configured to perform:

in response to receiving a target channel number input by a user, acquiring a reference frequency corresponding to the target channel number according to a pre-stored correspondence between the channel number and the frequency;

and broadcasting the channel according to the reference frequency.

In some embodiments, the controller is further configured to perform:

when the automatic frequency control function cannot detect a first frequency in the first frequency modulation range, closing the automatic frequency control function and controlling the display to display prompt information to a user;

the prompt information is used for indicating a user to start an ATV fine tuning function preset by display equipment, and fine tuning the reference frequency to a second frequency outside the first frequency tuning range.

In some embodiments, the controller is further configured to perform:

when the user finely adjusts the reference frequency to the second frequency, storing the corresponding relation between the target channel number and the second frequency;

responding to the operation of closing the ATV fine adjustment function by a user, and starting the automatic frequency control function again;

the automatic frequency control function is further configured to: determining a second frequency modulation range according to the second frequency and the frequency offset allowable value; and in the second frequency modulation range, if a third frequency which enables the channel playing effect to be optimal is detected, locking the channel to the third frequency.

In some embodiments, the controller is further configured to perform:

when the automatic frequency control function cannot detect a first frequency in the first frequency modulation range, closing the automatic frequency control function, and starting an ATV fine tuning function preset by display equipment;

responding to a user to finely adjust the reference frequency to a second frequency outside the first frequency adjustment range, and storing the corresponding relation between the target channel number and the second frequency;

closing the operation of the ATV fine tuning function, and starting the automatic frequency control function again;

In a second aspect, the present invention provides an analog tv playing method, including:

In some embodiments, the method further comprises:

and broadcasting the channel according to the reference frequency.

In some embodiments, the method further comprises:

Because the frequency deviation may be caused by the influence of interference factors such as weather and terrain on the signal of the analog television, the frequency deviation allowable value is preset, and the reference frequency corresponding to the frequency channel is combined, so that the frequency channel can be adjusted to the optimal playing effect in the first frequency modulation range. The method and the device have the advantages that the control mode based on Automatic Frequency Control (AFC) is adopted, the first frequency with the optimal channel playing effect can be automatically detected in the first frequency modulation range, the channel is automatically locked at the first frequency, namely, the frequency of the channel is locked according to the first frequency, the channel can be played on the frequency point corresponding to the first frequency, and the optimal channel playing effect means that the channel can be normally, stably and clearly displayed. According to the method and the device, the user does not need to manually fine-tune the analog signal for many times, but the built-in frequency automatic control function of the display device is utilized, the first frequency is automatically detected, the channel is automatically locked at the first frequency to be played, the channel can be automatically and quickly optimally played, and the practical application experience of the user is improved.

Drawings

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

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

fig. 2 is a block diagram schematically showing a hardware configuration of the control apparatus 100 in fig. 1;

fig. 3 is a block diagram illustrating a hardware configuration of the display device 200 in fig. 1;

fig. 4 is a block diagram illustrating an architectural configuration of an operating system in a memory of the display device 200;

an ATV trim page is illustrated in FIG. 5;

FIG. 6 is a flow chart illustrating an analog television play method;

another analog television playing method is illustrated in the flow chart of fig. 7.

Detailed Description

To make the objects, technical solutions and advantages of the exemplary embodiments of the present application clearer, the technical solutions in the exemplary embodiments of the present application will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present application, and it is obvious that the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the exemplary embodiments shown in the present application without inventive effort, shall fall within the scope of protection of the present application. Moreover, while the disclosure herein has been presented in terms of exemplary one or more examples, it is to be understood that each aspect of the disclosure can be utilized independently and separately from other aspects of the disclosure to provide a complete disclosure.

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

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

The term "gesture" as used in this application refers to a user's behavior through a change in hand shape or an action such as hand motion to convey a desired idea, action, purpose, or result.

The display device adjusts the high-frequency analog signal into the intermediate-frequency analog signal after receiving the high-frequency analog signal sent by the signal source, demodulates the intermediate-frequency analog signal, and finds the frequency corresponding to the optimal playing effect to lock the frequency of the channel within a set certain frequency deviation range according to the reference frequency corresponding to different channels, so as to ensure that each channel can realize the optimal playing on the display.

As for the other signal processing modes of the display device end for the analog signal, and the modulation and transmission modes of the CVBS signal by the signal source are not limited, for example, the transmission mode may adopt an antenna (antenna) or cable (cable) mode, which does not affect the essence of the scheme.

According to the method, an automatic frequency control function and an ATV fine adjustment function are required to be built in the display equipment, two modes are achieved, the first mode is that automatic detection and frequency locking of the optimal playing frequency point of a channel are achieved only through the automatic frequency control function, the second mode is a semi-automatic scheme that the automatic frequency control function and the ATV fine adjustment function are combined, the two schemes are executed in the display equipment, and therefore the structure, software/hardware configuration, function implementation and other contents of the display equipment are explained in detail firstly.

Fig. 1 is a schematic diagram illustrating an operation scenario between a display device and a control apparatus. As shown in fig. 1, the control apparatus 100 and the display device 200 may communicate with each other in a wired or wireless manner.

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

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

The control device 100 may also be an intelligent device, such as a mobile terminal 100B, a tablet computer, a notebook computer, and the like. For example, the display device 200 is controlled using an application program running on the smart device. The application program can provide various controls for a User through an intuitive User Interface (UI) on a screen associated with the smart device through configuration.

For example, the mobile terminal 100B may install a software application with the display device 200 to implement connection communication through a network communication protocol for the purpose of one-to-one control operation and data communication. Such as: the mobile terminal 100B may be caused to establish a control instruction protocol with the display device 200 to implement the functions of the physical keys as arranged in the remote control 100A by operating various function keys or virtual buttons of the user interface provided on the mobile terminal 100B. The audio and video content displayed on the mobile terminal 100B may also be transmitted to the display device 200, so as to implement a synchronous display function.

The display apparatus 200 may provide a network television function of a broadcast receiving function and a computer support function. The display device may be implemented as a digital television, a web television, an Internet Protocol Television (IPTV), or the like.

The display device 200 may be a liquid crystal display, an organic light emitting display, a projection device. The specific display device type, size, resolution, etc. are not limited.

The display apparatus 200 also performs data communication with the server 300 through various communication means. Here, the display apparatus 200 may be allowed to be communicatively connected through a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 300 may provide various contents and interactions to the display apparatus 200. By way of example, the display device 200 may send and receive information such as: receiving Electronic Program Guide (EPG) data, receiving software Program updates, or accessing a remotely stored digital media library. The servers 300 may be a group or groups of servers, and may be one or more types of servers. Other web service contents such as a video on demand and an advertisement service are provided through the server 300.

Fig. 2 is a block diagram illustrating the configuration of the control device 100. As shown in fig. 2, the control device 100 includes a controller 110, a memory 120, a communicator 130, a user input interface 140, an output interface 150, and a power supply 160.

The controller 110 includes a RAM (Random Access Memory) 111, a ROM (Read-Only Memory) 112, a processor 113, a communication interface, and a communication bus. The controller 110 is used to control the operation of the control device 100, as well as the internal components of the communication cooperation, external and internal data processing functions.

Illustratively, when an interaction of a user pressing a key disposed on the remote controller 100A or an interaction of touching a touch panel disposed on the remote controller 100A is detected, the controller 110 may control to generate a signal corresponding to the detected interaction and transmit the signal to the display device 200.

And a memory 120 for storing various operation programs, data and applications for driving and controlling the control apparatus 100 under the control of the controller 110. The memory 120 may store various control signal commands input by a user.

The communicator 130 enables communication of control signals and data signals with the display apparatus 200 under the control of the controller 110. Such as: the control apparatus 100 transmits a control signal (e.g., a touch signal or a button signal) to the display device 200 via the communicator 130, and the control apparatus 100 may receive the signal transmitted by the display device 200 via the communicator 130. The communicator 130 may include an infrared module 131 (infrared signal interface) and a radio frequency signal interface 132. For example: when the infrared signal interface is used, the user input instruction needs to be converted into an infrared control signal according to an infrared control protocol, and the infrared control signal is sent to the display device 200 through the infrared sending module. The following steps are repeated: when the rf signal interface is used, a user input command needs to be converted into a digital signal, and then the digital signal is modulated according to the rf control signal modulation protocol and then transmitted to the display device 200 through the rf transmitting terminal.

The user input interface 140 may include at least one of a microphone 141, a touch pad 142, a sensor 143, a key 144, and the like, so that a user can input a user instruction regarding controlling the display apparatus 200 to the control apparatus 100 through voice, touch, gesture, press, and the like.

The output interface 150 outputs a user instruction received by the user input interface 140 to the display apparatus 200, or outputs an image or voice signal received by the display apparatus 200. Here, the output interface 150 may include an LED interface 151, a vibration interface 152 generating vibration, a sound output interface 153 outputting sound, a display 154 outputting an image, and the like. For example, the remote controller 100A may receive an output signal such as audio, video, or data from the output interface 150, and display the output signal in the form of an image on the display 154, in the form of audio on the sound output interface 153, or in the form of vibration on the vibration interface 152.

And a power supply 160 for providing operation power support for each element of the control device 100 under the control of the controller 110. In the form of a battery and associated control circuitry.

A hardware configuration block diagram of the display device 200 is exemplarily shown in fig. 3. As shown in fig. 3, the display apparatus 200 may include a tuner demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a memory 260, a user interface 265, a video processor 270, a display 275, an audio processor 280, an audio output interface 285, and a power supply 290.

The tuner demodulator 210 receives the broadcast television signal in a wired or wireless manner, may perform modulation and demodulation processing such as amplification, mixing, and resonance, and is configured to demodulate, from a plurality of wireless or wired broadcast television signals, an audio/video signal carried in a frequency of a television channel selected by a user, and additional information (e.g., EPG data).

The tuner demodulator 210 is responsive to the user selected frequency of the television channel and the television signal carried by the frequency, as selected by the user and controlled by the controller 250.

The tuner demodulator 210 can receive a television signal in various ways according to the broadcasting system of the television signal, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting, internet broadcasting, or the like; and according to different modulation types, a digital modulation mode or an analog modulation mode can be adopted; and can demodulate the analog signal and the digital signal according to the different kinds of the received television signals.

In other exemplary embodiments, the tuning demodulator 210 may also be in an external device, such as an external set-top box. In this way, the set-top box outputs a television signal after modulation and demodulation, and inputs the television signal into the display apparatus 200 through the external device interface 240.

The communicator 220 is a component for communicating with an external device or an external server according to various communication protocol types. For example, the display apparatus 200 may transmit content data to an external apparatus connected via the communicator 220, or browse and download content data from an external apparatus connected via the communicator 220. The communicator 220 may include a network communication protocol module or a near field communication protocol module, such as a WIFI module 221, a bluetooth module 222, and a wired ethernet module 223, so that the communicator 220 may receive a control signal of the control device 100 according to the control of the controller 250 and implement the control signal as a WIFI signal, a bluetooth signal, a radio frequency signal, and the like.

The detector 230 is a component of the display apparatus 200 for collecting signals of an external environment or interaction with the outside. The detector 230 may include a sound collector 231, such as a microphone, which may be used to receive a user's sound, such as a voice signal of a control instruction of the user to control the display device 200; alternatively, ambient sounds may be collected that identify the type of ambient scene, enabling the display device 200 to adapt to ambient noise.

In some other exemplary embodiments, the detector 230, which may further include an image collector 232, such as a camera, a video camera, etc., may be configured to collect external environment scenes to adaptively change the display parameters of the display device 200; and the function of acquiring the attribute of the user or interacting gestures with the user so as to realize the interaction between the display equipment and the user.

In some other exemplary embodiments, the detector 230 may further include a light receiver (not shown) for collecting the intensity of the ambient light to adapt to the display parameter variation of the display device 200.

In some other exemplary embodiments, the detector 230 may further include a temperature sensor (not shown), such as by sensing an ambient temperature, and the display device 200 may adaptively adjust a display color temperature of the image. For example, when the temperature is higher, the display apparatus 200 may be adjusted to display a color temperature of an image that is cooler; when the temperature is lower, the display device 200 may be adjusted to display a warmer color temperature of the image.

The external device interface 240 is a component for providing the controller 250 to control data transmission between the display apparatus 200 and an external apparatus. The external device interface 240 may be connected to an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner, and may receive data such as a video signal (e.g., moving image), an audio signal (e.g., music), additional information (e.g., EPG), etc. of the external apparatus.

The external device interface 240 may include: one or more of an HDMI (High Definition multimedia interface) terminal 241, a CVBS (Composite Video Blanking and Sync) terminal 242, a Component (analog or digital) terminal 243, a USB (Universal Serial Bus) terminal 244, a Component (Component) terminal (not shown), a red, green, blue (RGB) terminal (not shown), and the like.

The controller 250 controls the operation of the display device 200 and responds to the operation of the user by running various software control programs (such as an operating system and various application programs) stored on the memory 260.

As shown in fig. 3, the controller 250 includes a RAM (random access memory) 251, a ROM (read only memory) 252, a graphic processor 253, a CPU processor 254, a communication interface 255, and a communication bus 256. The RAM251, the ROM252, the graphic processor 253, the CPU processor 254, and the communication interface 255 are connected by a communication bus 256.

The ROM252 stores various system boot instructions. When the display apparatus 200 starts power-on upon receiving the power-on signal, the CPU processor 254 executes a system boot instruction in the ROM252, copies the operating system stored in the memory 260 to the RAM251, and starts running the boot operating system. After the start of the operating system is completed, the CPU processor 254 copies the various application programs in the memory 260 to the RAM251 and then starts running and starting the various application programs.

And a graphic processor 253 for generating various graphic objects such as icons, operation menus, and user input instruction display graphics, etc. The graphic processor 253 may include an operator for performing an operation by receiving various interactive instructions input by a user, and further displaying various objects according to display attributes; and a renderer for generating various objects based on the operator and displaying the rendered result on the display 275.

A CPU processor 254 executes the operating system and application program instructions stored in memory 260 and, in accordance with received user input instructions, performs the processing of various application programs, data and content for the ultimate display and playback of various audiovisual content.

In some example embodiments, the CPU processor 254 may comprise a plurality of processors. The plurality of processors may include one main processor and a plurality of or one sub-processor. A main processor for performing some initialization operations of the display apparatus 200 in the display apparatus preload mode and/or operations of displaying a screen in the normal mode. A plurality of or one sub-processor for performing an operation in a state of a standby mode or the like of the display apparatus.

The communication interface 255 may include a first interface, a second interface, and an nth interface. These interfaces may be network interfaces that are connected to external devices via a network.

The controller 250 may control the overall operation of the display apparatus 200. For example: in response to receiving a User input command for selecting a GUI (Graphical User Interface) object displayed on the display 275, the controller 250 may perform an operation related to the object selected by the User input command.

Where the object may be any one of the selectable objects, such as a hyperlink or an icon. The operation related to the selected object is, for example, an operation of displaying a link to a hyperlink page, document, image, or the like, or an operation of executing a program corresponding to the object. The user input command for selecting the GUI object may be a command input through various input means (e.g., a mouse, a keyboard, a touch panel, etc.) connected to the display apparatus 200 or a voice command corresponding to a voice spoken by the user.

A memory 260 for storing various types of data, software programs, or applications for driving and controlling the operation of the display device 200. The memory 260 may include volatile and/or nonvolatile memory. And the term "memory" includes the memory 260, the RAM251 and the ROM252 of the controller 250, or a memory card in the display device 200.

In some embodiments, the memory 260 is specifically used for storing an operating program for driving the controller 250 of the display device 200; storing various application programs built in the display apparatus 200 and downloaded by a user from an external apparatus; data such as visual effect images for configuring various GUIs provided by the display 275, various objects related to the GUIs, and selectors for selecting GUI objects are stored.

In some embodiments, memory 260 is specifically configured to store drivers for tuner demodulator 210, communicator 220, detector 230, external device interface 240, video processor 270, display 275, audio processor 280, etc., and related data, such as external data (e.g., audio-visual data) received from the external device interface or user data (e.g., key information, voice information, touch information, etc.) received by the user interface.

In some embodiments, memory 260 specifically stores software and/or programs representing an Operating System (OS), which may include, for example: a kernel, middleware, an Application Programming Interface (API), and/or an Application program. Illustratively, the kernel may control or manage system resources, as well as functions implemented by other programs (e.g., the middleware, APIs, or applications); at the same time, the kernel may provide an interface to allow middleware, APIs, or applications to access the controller to enable control or management of system resources.

A block diagram of the architectural configuration of the operating system in the memory of the display device 200 is illustrated in fig. 4. The operating system architecture comprises an application layer, a middleware layer and a kernel layer from top to bottom.

The application layer, the application programs built in the system and the non-system-level application programs belong to the application layer. Is responsible for direct interaction with the user. The application layer may include a plurality of applications such as a setup application, a post application, a media center application, and the like. These applications may be implemented as Web applications that execute based on a WebKit engine, and in particular may be developed and executed based on HTML5, Cascading Style Sheets (CSS), and JavaScript.

Here, HTML, which is called HyperText Markup Language (HyperText Markup Language), is a standard Markup Language for creating web pages, and describes the web pages by Markup tags, where the HTML tags are used to describe characters, graphics, animation, sound, tables, links, etc., and a browser reads an HTML document, interprets the content of the tags in the document, and displays the content in the form of web pages.

CSS, known as Cascading Style Sheets (Cascading Style Sheets), is a computer language used to represent the Style of HTML documents, and may be used to define Style structures, such as fonts, colors, locations, etc. The CSS style can be directly stored in the HTML webpage or a separate style file, so that the style in the webpage can be controlled.

JavaScript, a language applied to Web page programming, can be inserted into an HTML page and interpreted and executed by a browser. The interaction logic of the Web application is realized by JavaScript. The JavaScript can package a JavaScript extension interface through a browser, realize the communication with the kernel layer,

the middleware layer may provide some standardized interfaces to support the operation of various environments and systems. For example, the middleware layer may be implemented as Multimedia and Hypermedia Experts Group (MHEG) middleware related to data broadcasting, DLNA (Digital Living Network Alliance) middleware of middleware related to communication with an external device, middleware providing a browser environment in which each application program in the display device operates, and the like.

The kernel layer provides core system services, such as: file management, memory management, process management, network management, system security authority management and the like. The kernel layer may be implemented as a kernel based on various operating systems, for example, a kernel based on the Linux operating system.

The kernel layer also provides communication between system software and hardware, and provides device driver services for various hardware, such as: the display driver is provided for the display, the camera driver is provided for the camera, the key driver is provided for the remote controller, the WIFI driver is provided for the WIFI module, the audio driver is provided for the audio output interface, the Power Management driver is provided for the Power Management (PM) module, and the like.

A user interface 265 receives various user interactions. Specifically, it is used to transmit an input signal of a user to the controller 250 or transmit an output signal from the controller 250 to the user. For example, the remote controller 100A may transmit an input signal, such as a power switch signal, a channel selection signal, a volume adjustment signal, etc., input by the user to the user interface 265, and then the input signal is transferred to the controller 250 through the user interface 265; alternatively, the remote controller 100A may receive an output signal such as audio, video, or data output from the user interface 265 via the controller 250, and display the received output signal or output the received output signal in audio or vibration form.

In some embodiments, a user may enter user commands on a Graphical User Interface (GUI) displayed on the display 275, and the user interface 265 receives the user input commands through the GUI. Specifically, the user interface 265 may receive user input commands for controlling the position of a selector in the GUI to select different objects or items.

Alternatively, the user may input a user command by inputting a specific sound or gesture, and the user interface 265 receives the user input command by recognizing the sound or gesture through the sensor.

The video processor 270 is configured to receive an external video signal, and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to a standard codec protocol of the input signal, so as to obtain a video signal that is directly displayed or played on the display 275.

Illustratively, the video processor 270 includes a demultiplexing module, a video decoding module, an image synthesizing module, a frame rate conversion module, a display formatting module, and the like.

The demultiplexing module is configured to demultiplex an input audio/video data stream, where, for example, an input MPEG-2 stream (based on a compression standard of a digital storage media moving image and voice), the demultiplexing module demultiplexes the input audio/video data stream into a video signal and an audio signal.

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

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

The frame rate conversion module is configured to convert a frame rate of an input video, for example, convert a frame rate of an input 60Hz video into a frame rate of 120Hz or 240Hz, where a common format is implemented by using, for example, an interpolation frame method.

And a display formatting module for converting the signal output by the frame rate conversion module into a signal conforming to a display format of a display, such as converting the format of the signal output by the frame rate conversion module to output an RGB data signal.

A display 275 for receiving the image signal from the video processor 270 and displaying the video content, the image and the menu manipulation interface. The display video content may be from the video content in the broadcast signal received by the tuner-demodulator 210, or from the video content input by the communicator 220 or the external device interface 240. The display 275, while displaying a user manipulation interface UI generated in the display apparatus 200 and used to control the display apparatus 200.

And, the display 275 may include a display screen assembly for presenting a picture and a driving assembly for driving the display of an image. Alternatively, a projection device and projection screen may be included, provided display 275 is a projection display.

The audio processor 280 is configured to receive an external audio signal, decompress and decode the received audio signal according to a standard codec protocol of the input signal, and perform audio data processing such as noise reduction, digital-to-analog conversion, and amplification processing to obtain an audio signal that can be played by the speaker 286.

Illustratively, audio processor 280 may support various audio formats. Such as MPEG-2, MPEG-4, Advanced Audio Coding (AAC), high efficiency AAC (HE-AAC), and the like.

The audio output interface 285 is used for receiving an audio signal output by the audio processor 280 under the control of the controller 250, and the audio output interface 285 may include a speaker 286 or an external sound output terminal 287, such as an earphone output terminal, for outputting to a generating device of an external device.

In other exemplary embodiments, video processor 270 may comprise one or more chips. Audio processor 280 may also comprise one or more chips.

And, in other exemplary embodiments, the video processor 270 and the audio processor 280 may be separate chips or may be integrated with the controller 250 in one or more chips.

And a power supply 290 for supplying power supply support to the display apparatus 200 from the power input from the external power source under the control of the controller 250. The power supply 290 may be a built-in power supply circuit installed inside the display apparatus 200 or may be a power supply installed outside the display apparatus 200.

The display device generally has an ATV Fine Tuning function built in, and an ATV Fine Tuning page can be accessed through a certain operation path, taking a Linux operation system as an example, the operation path is to sequentially select a Menu (Menu) → Settings (Settings) → channels → ATV Fine Tuning (ATV Fine Tuning, analog tv Fine Tuning), fig. 5 shows an ATV Fine Tuning page, when a user does not Fine tune, an initial reference frequency of a current Channel is displayed in the page, the user can adjust a reference frequency by clicking a left side/right side button, for example, the frequency can be reduced by clicking the left side button, the frequency can be increased by clicking the right side button, and the frequency adjustment mode can be that the left side button or the right side button is pressed for a long time, so that the reference frequency is continuously decreased or increased; the left or right button may also be clicked one or more times, and the preset frequency difference may be adjusted each time the button is clicked, for example, the preset frequency difference is 0.065Mhz, so that the reference frequency is increased by 0.065Mhz each time the right button is clicked, and the reference frequency is decreased by 0.065Mhz each time the left button is clicked. When the channel of a certain mode television can not be displayed normally, for example, displaying snowflakes, the signal frequency is finely adjusted through the channel until the channel can be played normally, but the process often needs manual fine adjustment of a user for many times to be successful, time and labor are wasted, the efficiency is low, and the user experience is poor.

It should be noted that, for different display device operating systems, the operating paths entering the ATV fine tuning page may be different, and in addition, the display of each page in the process of executing the operating path is not limited, which is subject to practical application. The form of ATV trimming is not limited to the embodiment, for example, a reference frequency value for trimming may be manually input by a user.

To solve the technical problem of pure ATV fine tuning, fig. 6 shows an embodiment of an analog tv playing method, which is configured to be executed by the controller 250 in the display device, that is, the controller 250 is the executing body of the method, where the method includes:

step S101, in response to receiving a target channel number input by a user, obtaining a reference frequency corresponding to the target channel number according to a pre-stored correspondence between channel numbers and frequencies.

The mode of inputting the target channel number by the user is not limited, and for example, the channel switching key on the remote controller may be used to tune the channel and further switch to the channel to be watched, or the number of the target channel to be watched may be directly input through the number keys on the remote controller.

And step S102, starting broadcasting the channel according to the reference frequency.

For different countries or regions, the modulation rules of the ATV signals from the signal source are different, and there are two common modulation rules, the first modulation rule is to modulate each channel on a corresponding fixed physical frequency point, that is, each channel number has a corresponding reference frequency, when the display device searches for a channel for the first time, a channel B is searched at the reference frequency a, and the corresponding relationship between the channel number B and the reference frequency a needs to be stored, so that the channel B corresponding to the reference frequency a can be recorded at the display device. For example, in the Antenna transmission mode, the reference frequency corresponding to the channel number 2 is 55.25Mhz, and the reference frequency corresponding to the channel number 3 is 61.25Mhz, under this modulation rule, if the signal source does not modify the physical frequency point to which the channel is modulated, then the reference frequency corresponding to the channel number stored in the display device is fixed, and the first frequency modulation range [ reference frequency-frequency offset allowable value, reference frequency + frequency offset allowable value ] is also fixed, in this case, each channel has a fixed automatic frequency modulation range, and the frequency modulation range does not exceed the limit of the frequency offset allowable value.

The first frequency modulation range is set with the reference frequency as the center and the allowable value of frequency deviation as positive and negative deviations, and the first frequency modulation range is the effective range of AFC, for example, if the allowable value of frequency deviation is 2Mhz, the first frequency modulation range corresponding to the channel 2 is [53.25Mhz, 57.25Mhz ], the first frequency modulation range corresponding to the channel 3 is [59.25Mhz, 63.25Mhz ], the channel 2 only allows the signal frequency which makes the channel reach the optimal playing to be detected in the range of [53.25Mhz, 57.25Mhz ], and the channel 2 is locked by using the signal frequency detected in the range, and the frequency of the channel 2 is not allowed to be locked by using the frequency points between the channel 2 and the channel 3 (57.25Mhz, 59.25Mhz), that is, the channel 2 can be searched only in the range of [53.25Mhz, 57.25Mhz ]. An AFC automatic control mode may be employed in this mode.

The second modulation rule is that the modulation of the ATV signal by the signal source is not fixed, i.e. each channel has no relatively fixed reference frequency, the frequency adjustment range may be between 44Mhz to 865Mhz, the channel search is performed within the frequency adjustment range step by step according to the preset step size, and when a channel is searched, the frequency corresponding to the channel is recorded and stored for the reference frequency used when the channel is played next time. In this case, the frequency modulation range of each channel is large, and if the AFC automatic control cannot meet the modulation requirement, the AFC control mode and the ATC fine adjustment need to be combined.

In an ATV, each channel has a number (i.e. a channel number), the number is generally a numeric number, such as channel 1, channel 2, and the like, a corresponding relationship between the channel number and the frequency needs to be stored in advance in a display device, and the corresponding relationship can be stored in a list form, so that a corresponding reference frequency can be obtained according to the channel number, and then the channel can be played according to the reference frequency. For the first modulation rule, after the channel is first searched, the reference frequency corresponding to each channel is obtained, and the reference frequency corresponding to each channel stored in the display device is fixed and unchanged, so that the corresponding relationship between the channel number and the frequency stored in the display device is also unchangeable. For the second modulation rule, if the optimal playing of the ATV channel can be realized only by the frequency automatic control function, the reference frequency corresponding to the channel number stored at the display device end and the first frequency modulation range (i.e., AFC effective range) are not changed; if the channel is optimally played by combining AFC and ATV fine adjustment, the reference frequency corresponding to the channel number and the first frequency modulation range (i.e., AFC effective range) are changed, because the user adjusts the reference frequency when performing ATV fine adjustment manually.

And step S103, starting an automatic frequency control function preset by the display equipment when the display starts playing the channel.

When a channel of an analog television is played, starting an automatic frequency control function, and if a first modulation rule is used by display equipment, only automatic frequency control is needed to complete automatic detection and frequency locking of an optimal playing frequency point of the channel; if the second modulation rule is used by the display device, the automatic frequency control function is started preferentially, and when the automatic frequency control function cannot be effective, the ATV fine adjustment function is intervened.

Step S104, in a first frequency modulation range determined according to a reference frequency and a frequency offset allowable value corresponding to a channel, if a first frequency which enables a channel playing effect to be optimal is detected, the channel is locked at the first frequency.

For a first modulation rule, for example, a reference frequency of 55.25Mhz at channel 2 start-up, then the scenarios that require re-tuning include, but are not limited to, the following:

(1) the analog signal is affected by interference factors such as weather and terrain, the actual frequency of the channel 2 is shifted from the reference frequency, so that when the frequency of the channel 2 is locked to 55.25Mhz, the actual picture of the channel 2 is displayed as snowflake, the channel 2 cannot be played normally, and in the first frequency modulation range [53.25Mhz, 57.25Mhz ] corresponding to the channel 2, the detection mechanism of the AFC function detects that the playing effect of the channel 2 is the best when 55.4Mhz is detected, that is, the first frequency is 55.4Mhz, the AFC function automatically locks the frequency of the channel 2 to 55.4 Mhz. The frequency offset is typically small in this scenario.

(2) The signal source (signal transmitting end) changes the reference frequency of the channel 2 to another frequency value in the first frequency modulation range [53.25Mhz, 57.25Mhz ], for example, the reference frequency is changed from 55.25Mhz to 56.25Mhz, the frequency change amount reaches 1Mhz, at this time, 55.25Mhz cannot play the channel 2, in the first frequency modulation range [53.25Mhz, 57.25Mhz ] corresponding to the channel 2, the detection mechanism of the AFC function detects that the playing effect of the channel 2 is the best when 56.25Mhz is detected, that is, the first frequency is 56.25Mhz, the function will automatically lock the channel 2 to 56.25Mhz for playing, so that the picture of the channel 2 can be played again normally.

It should be noted that, with regard to the first modulation rule, the first frequency modulation range corresponding to each channel on the display device side is not changeable, and the signal source does not modulate the reference frequency of the channel beyond the first frequency modulation range.

Step S105, when the automatic frequency control function cannot detect the first frequency in the first frequency modulation range, the automatic frequency control function is closed, and the display is controlled to display prompt information to a user.

For a second modulation rule, for example, a reference frequency of 55.25Mhz at channel 2 start-up, then the scenarios that need to be re-tuned include, but are not limited to, the following:

(1) the analog signal is affected by interference factors such as weather and terrain, the actual frequency of the channel 2 is shifted from the stored reference frequency, so that when the frequency of the channel 2 is locked to 55.25Mhz, the actual picture of the channel 2 is displayed as snowflake, the channel 2 cannot be played normally, and in the first frequency modulation range [53.25Mhz, 57.25Mhz ] corresponding to the channel 2, the detection mechanism of the AFC function detects that the playing effect of the channel 2 is the best when 55.4Mhz is detected, i.e. the first frequency is 55.4Mhz, the AFC function automatically locks the frequency of the channel 2 to 55.4 Mhz.

(2) The signal source (signal transmitting end) changes the frequency of the channel 2 to another frequency value in the first frequency modulation range [53.25Mhz, 57.25Mhz ], for example, to 56.25Mhz, the frequency variation reaches 1Mhz, at this time, 55.25Mhz cannot play the channel 2, and in the first frequency modulation range [53.25Mhz, 57.25Mhz ] corresponding to the channel 2, the detection mechanism of the AFC function detects that the playing effect of the channel 2 is the best when 56.25Mhz is detected, that is, the first frequency is 56.25Mhz, the AFC function will automatically lock the channel 2 to 56.25Mhz to play, so that the picture of the channel 2 can resume normal playing.

Under the second modulation rule, the (1) and (2) scenes can directly realize automatic detection and frequency locking of the optimal playing frequency point of the channel through the AFC, and the effective range of the AFC is not changed and still is [53.25Mhz, 57.25Mhz ], so that the implementation mode is similar to that of the (1) and (2) scenes under the first modulation rule. Unlike the first modulation rule, with the second modulation rule, the modulation of the ATV signal by the signal source is not fixed, and therefore, if the frequency of a certain channel is changed by the signal source to be outside the first frequency modulation range, the following scenario (3) may occur.

(3) When the signal source (signal transmitting end) changes the frequency of the channel 2 to another frequency value outside the first frequency modulation range [53.25Mhz, 57.25Mhz ], for example, to 58Mhz, and the reference frequency is 55.25Mhz when the channel 2 starts playing, it is obvious that the effective range of the AFC cannot cover 58Mhz, that is, the automatic frequency control function cannot detect the first frequency in the first frequency modulation range, which means that the channel is locked in any frequency in the first frequency modulation range and cannot achieve optimal playing, and the ATV fine tuning function needs to be involved to optimize the channel playing effect. The AFC function and the ATV fine tuning function are not effective at the same time, namely the ATV fine tuning function needs to be kept closed when the AFC function is started; when the ATV fine tuning function is started, the AFC function needs to be temporarily closed, and after the ATV fine tuning is completed, the fine tuning function is closed and the AFC function is started. In this scenario, the frequency value of the signal source change does not deviate significantly from the boundary value of the first tuning range.

In the scenario of (3), when the automatic frequency control function is turned off, the display may be controlled to display a prompt message to a user, where the prompt message is used to instruct the user to start an ATV fine tuning function preset by the display device, and fine tune the reference frequency to a second frequency outside the first frequency tuning range. For example, the prompt message may be "please perform ATV fine tuning on the current channel", and after seeing the prompt message, the user may enter an ATV fine tuning page according to a specified operation path, and then adjust the reference frequency in the page. The content of the prompting information is not limited, and the prompting information can be set based on practical application, so that the prompting information has better prompting property and guiding property.

Step S106, when the user fine-tunes the reference frequency to the second frequency, storing a corresponding relationship between the target channel number and the second frequency.

When the user confirms the second frequency, the reference frequency is updated to the value of the second frequency, in this case, the corresponding relationship between the updated reference frequency (i.e. the second frequency) and the channel number of the current channel needs to be stored, and the channel corresponding to the channel number can be broadcast according to the new reference frequency next time. That is, in the control mode in which AFC is dominant and ATV fine tuning is secondary, the reference frequency corresponding to the channel needs to be updated each time ATV fine tuning is performed, because if the reference frequency is not updated, the frequency modulation range is not changed, and the frequency-locked frequency point corresponding to optimal playing cannot be obtained in the next frequency modulation range.

And step S107, responding to the operation of closing the ATV fine tuning function by the user, and starting the automatic frequency control function again.

Step S108, according to a second frequency and the frequency offset allowable value, determining a second frequency modulation range, and if a third frequency which enables the channel playing effect to be optimal is detected in the second frequency modulation range, locking the channel at the third frequency.

And when the second frequency is adjusted on the ATV fine adjustment page by the user, executing the operation of exiting the ATV fine adjustment page, so as to close the ATV fine adjustment function, starting the automatic frequency control function again, acquiring a second frequency adjustment range by taking the second frequency manually adjusted by the user as a reference and combining a frequency deviation allowable value, and then, re-detecting whether a third frequency which enables the current channel playing effect to be optimal exists in the newly acquired second frequency adjustment range. If a third frequency is detected in the second frequency modulation range, locking the current channel at the third frequency for playing; if the channel still cannot be normally played in the second frequency modulation range, which indicates that the frequency value of the signal source after the channel change is still outside the second frequency modulation range in the (3) th situation, the automatic frequency control function needs to be turned off, and the display is controlled to display the prompt information to the user, and then the control mode combining the ATV fine tuning function and the AFC shown in the steps S106 to S107 is executed again until the current channel picture is normally played. In the scenario (3), the deviation between the frequency value of the signal source change and the boundary value of the first frequency modulation range is not large, and the frequency offset allowable value is provided to expand the frequency modulation range of the AFC, so that the number of times of actual manual fine tuning by a user is small, that is, the current channel can be locked to the target frequency to realize the optimal playing, compared with the pure user manual fine tuning, the number of times of fine tuning by the user is greatly reduced, the channel can realize the optimal playing more quickly, the playing efficiency of the analog television is improved, and the actual application experience of the user is improved.

For example, according to the example in the aforementioned scenario (3), the channel 2 starts playing at the frequency of 55.25Mhz, but the signal source changes the frequency of the channel 2 to 58Mhz, the effective range [53.25Mhz, 57.25Mhz ] of the AFC cannot cover 58Mhz, the user participates in ATV fine tuning after seeing the prompt information, and manually fine-tunes the frequency to 56.25Mhz, that is, the second frequency is 56.25Mhz, and after turning off the ATV fine tuning function and starting the AFC function, the effective range of the AFC is changed to [54.25Mhz, 58.25Mhz ], and the new frequency tuning range can cover 58Mhz, so that it can be detected that the current channel can achieve the optimal playing effect at 58Mhz, that is, the third frequency is 58Mhz, and the function automatically locks the current channel to 58Mhz to play, and achieves the optimal playing of the current channel.

It should be noted that the detection mechanism of the AFC function is not specifically limited, and may be set according to practical applications, and the key point of the present application is to select a separate AFC control mode or a control mode combining AFC and ATV fine tuning according to the channel frequency state detected by the AFC and the modulation rule adopted by the apparatus. If the modulation rule is the first modulation rule, executing step S101 to step S104; if the modulation rule is the second modulation rule, the two scenes (1) and (2) are executed from step S101 to step S104, and the scene of (3) is executed from step S101 to step S103 and from step S105 to step S107. The technical scheme provided by the application can obviously reduce the times of manual fine tuning of the user, can improve the efficiency while the channel of the analog television reaches the optimal playing, and improves the user experience.

Fig. 7 shows another embodiment of an analog tv playing method, which is configured to be executed by the controller 250 in the display device, that is, the controller 250 is the execution subject of the method, and the method includes:

Step S201, when the automatic frequency control function cannot detect the first frequency within the first frequency modulation range, closing the automatic frequency control function, and starting an ATV fine tuning function preset in the display device.

Step S202, in response to the user fine-tuning the reference frequency to a second frequency outside the first frequency modulation range, storing a corresponding relationship between the target channel number and the second frequency.

And step S203, closing the operation of the ATV fine tuning function and starting the automatic frequency control function again.

The difference between this embodiment and the previous embodiment is only that when the automatic frequency control function cannot detect the first frequency within the first frequency modulation range, the automatic frequency control function is turned off, and at the same time, no prompt message needs to be displayed to the user, that is, the user does not need to manually start the ATV fine tuning function, but the controller automatically controls the ATV fine tuning function to start, directly controls the display to display the ATV fine tuning page, and the user directly adjusts the reference frequency on the ATV fine tuning page. After the user adjusts the reference frequency to the second frequency, the ATV fine adjustment function does not need to be manually closed by the user, and the controller automatically controls the ATV fine adjustment function to be closed and the automatic frequency control function to be started again, so that manual operation of the user is further reduced.

If the modulation rule is the first modulation rule, executing step S101 to step S104; if the modulation rule is the second modulation rule, the two scenes (1) and (2) are executed from step S101 to step S104, and the scene (3) is executed from step S101 to step S103, from step S201 to step S203, and step S108. The technical scheme provided by the application can obviously reduce the times of manual fine tuning of the user, can improve the efficiency while the channel of the analog television reaches the optimal playing, and improves the user experience.

The same and similar parts in the embodiments in this specification may be referred to each other, and the description of the embodiments is omitted.

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

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

Claims

1. A display device, comprising:

a display;

a user interface for receiving user input;

a controller for performing:

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

and broadcasting the channel according to the reference frequency.

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

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

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

6. An analog television playing method, comprising:

7. The method of claim 6, further comprising:

and broadcasting the channel according to the reference frequency.

8. The method of claim 7, further comprising:

9. The method of claim 8, further comprising:

10. The method of claim 7, wherein the controller is further configured to perform: