CN113490042A - Display device and channel searching method - Google Patents
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- 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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
- H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a display device and a channel searching method, wherein full-band searching is carried out on a dtv signal by utilizing the characteristic that a certain frequency point can only carry one of a dtv signal or an atv signal in a bandwidth range, and the searched frequency point with successful frequency locking is recorded; and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal. When the channel searching method is used for searching the television channels, the channel searching mode of dtv + atv is adopted, on one hand, the comprehensiveness of channel searching is ensured, and on the other hand, for the frequency point with successful frequency locking in the dtv channel searching process, the frequency point is skipped when channel searching is carried out at atv, so that the channel searching efficiency and the user experience are improved.
Description
Technical Field
The application relates to the technical field of televisions, in particular to a display device and a channel searching method.
Background
When a television uses or updates a television channel for the first time, a channel search operation needs to be performed to realize corresponding setting of the television channel (also called a physical channel) and frequency points (each physical channel corresponds to a fixed frequency point value). With the popularization of Digital televisions, atv (Analog TV) signals are gradually replaced by dtv (Digital TV) signals, that is, after a certain frequency point for transmitting atv signals is vacated, the dtv signals are used. Currently, the dtv signal is combined with the atv signal, so that many countries adopt a signal transmission mode of mixed networking of analog television and digital television. Currently, when searching for a television, in order to avoid missing a dtv or atv channel, a channel searching method of dtv + atv is generally adopted. When the channel searching is carried out in the dtv + atv channel searching mode, each frequency point in the frequency point map table needs to be searched twice, so that the channel searching efficiency is greatly reduced, and the user experience is influenced.
Disclosure of Invention
The application provides a display device and a channel searching method, which aim to solve the problem that when the existing channel searching mode is adopted to search channels, a frequency point map table needs to be searched twice, so that the channel searching efficiency is low, and the user experience is influenced.
The application provides a display device, including:
a communicator configured to receive a channel searching request from a user terminal;
a controller configured to: carrying out full-band search on the dtv signals, and recording the physical channel number or frequency range of the searched frequency point with successful frequency locking; and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal.
The application also provides a channel searching method, which comprises the following steps:
receiving a channel searching request from a user side;
carrying out full-band search on the dtv signals, and recording the physical channel number or frequency range of the searched frequency point with successful frequency locking;
and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal.
In some embodiments, performing full-band search on the dtv signal, and recording a physical channel number where a frequency point with a successful searched frequency locking is located specifically includes:
starting a dtv channel search, and taking a first frequency point in a frequency point map table as a target frequency point;
judging whether the dtv channel searching is finished or not, if not, locking the current target frequency point, judging whether the frequency locking is successful or not, and if so, recording the physical channel number of the current target frequency point into a skip list B; if the frequency locking is not successful, the next step is carried out;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and repeating the previous step;
and if the dtv channel searching is finished, ending the dtv channel searching.
In some embodiments, skipping a frequency point where frequency locking is successful in the dtv channel searching process, and searching for the atv signal specifically includes:
starting atv channel searching, and taking the first frequency point on the frequency point map as a target frequency point;
judging atv whether channel searching is finished, if atv channel searching is not finished, judging whether the physical channel number of the current target frequency point is recorded in a skip list B, and if the physical channel number of the current target frequency point is recorded in the skip list B, skipping the current target frequency point; if the physical channel number of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and repeating the previous step;
if atv channel searching is finished, the channel searching is finished.
In some embodiments, performing full-band search on the dtv signal, and recording a physical channel number where a frequency point with a successful searched frequency locking is located specifically includes:
judging a setting mode of the frequency point, wherein the setting mode of the frequency point comprises an STD and an HRC;
starting a dtv channel search, and taking a first frequency point in a corresponding frequency point setting mode in a frequency point map table as a target frequency point;
judging whether the dtv channel searching is finished or not, if not, locking the current target frequency point, judging whether the frequency locking is successful or not, and if so, recording the physical channel number of the target frequency point into a skip list B; if the frequency locking is not successful, the next step is carried out;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table in a corresponding frequency point setting mode, taking the frequency point as a target frequency point, and repeating the previous step;
and if the dtv channel searching is finished, ending the dtv channel searching.
In some embodiments, skipping a frequency point where frequency locking is successful in the dtv channel searching process, and searching for the atv signal specifically includes:
starting atv channel searching, and taking the first frequency point in the frequency point map table under the corresponding frequency point setting mode as a target frequency point;
judging atv whether channel searching is finished, if atv channel searching is not finished, judging whether the physical channel number of the current target frequency point is recorded in a skip list B, and if the physical channel number of the current target frequency point is recorded in the skip list B, skipping the current target frequency point; if the physical channel number of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table in a corresponding frequency point setting mode, taking the frequency point as a target frequency point, and repeating the previous step;
if atv channel searching is finished, the channel searching is finished.
In some embodiments, the setting mode of the frequency point is determined, and the setting model of the frequency point includes STD and HRC, specifically,
taking the STD frequency point corresponding to the first frequency point in the frequency point map table as a predicted frequency point;
frequency locking is carried out to predict the frequency point, if the frequency locking is successful, the frequency point setting mode is STD, and the judgment process of the frequency point setting mode is finished; if the frequency locking is not successful, performing frequency locking on the HRC frequency point corresponding to the predicted frequency point, if the frequency locking is successful, setting the frequency point setting mode to be HRC, and finishing the judgment process of the frequency point setting mode; if the frequency locking is not successful, traversing the STD frequency point corresponding to the next frequency point in the frequency point map table as a prediction frequency point, and repeating the step until the frequency locking is successful.
In some embodiments, performing full-band search on the dtv signal, and recording a frequency range where a searched frequency point with a successful frequency locking is located specifically includes:
starting a dtv channel search, and taking a first frequency point in a frequency point map table as a target frequency point;
judging whether the dtv channel searching is finished or not, if the dtv channel searching is not finished, locking the current target frequency point, and judging whether the frequency locking is successful or not; if the frequency locking is successful, recording the frequency range of the current target frequency point into a skip list B; if the frequency locking is not successful, the next step is carried out;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and repeating the previous step;
and if the dtv channel searching is finished, ending the dtv channel searching.
In some embodiments, skipping a frequency point where frequency locking is successful in the dtv channel searching process, and searching for the atv signal specifically includes:
starting atv channel searching, and taking the minimum frequency point on the frequency point map as a target frequency point;
judging atv whether channel searching is finished, if atv channel searching is not finished, judging whether the frequency range of the current target frequency point is recorded in a skip list B, and if the frequency range of the current target frequency point is recorded in the skip list B, skipping the current target frequency point; if the frequency range of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
accumulating a preset step length for the current target frequency point to obtain the next target frequency point, and repeating the previous step;
if atv channel searching is finished, the channel searching is finished.
The application discloses a display device and a channel searching method, wherein full-band searching is carried out on a dtv signal by utilizing the characteristic that a certain frequency point can only carry one of a dtv signal or an atv signal in a bandwidth range, and the searched frequency point with successful frequency locking is recorded; and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal. When the channel searching method is used for searching the television channels, the channel searching mode of dtv + atv is adopted, on one hand, the comprehensiveness of channel searching is ensured, and on the other hand, for the frequency point with successful frequency locking in the dtv channel searching process, the frequency point is skipped when channel searching is carried out at atv, so that the channel searching efficiency and the user experience are improved. When the channel searching method is used for searching the television channels, the channel searching mode of dtv + atv is adopted, on one hand, the comprehensiveness of channel searching is ensured, and on the other hand, for the frequency point with successful frequency locking in the dtv channel searching process, the frequency point is skipped when channel searching is carried out at atv, so that the channel searching efficiency and the user experience are improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 illustrates an operational scenario between a display device and a control apparatus according to some embodiments;
fig. 2 illustrates a hardware configuration block diagram of the control apparatus 100 according to some embodiments;
fig. 3 illustrates a hardware configuration block diagram of the display apparatus 200 according to some embodiments;
FIG. 4 illustrates a software configuration diagram in the display device 200 according to some embodiments;
FIG. 5 is a flowchart of a channel searching method according to the present application;
fig. 6 is a flowchart illustrating a channel searching process for north american market television antenna interface signals according to an embodiment of the present application;
FIG. 7 is a flowchart of a channel searching process for a cable interface signal of a television in the second North American market according to an embodiment of the present application;
fig. 8 is a flowchart of a channel searching process of a television in three EM markets according to an embodiment of the present application.
Detailed Description
To make the purpose and embodiments of the present application clearer, the following will clearly and completely describe the exemplary embodiments of the present application with reference to the attached 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, and not all of the embodiments.
It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.
The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.
The terms "comprises" and "comprising," 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 all elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.
The term "module" 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.
Fig. 1 is a schematic diagram of an operation scenario between a display device and a control apparatus according to an embodiment. As shown in fig. 1, a user may operate the display apparatus 200 through the smart device 300 or the control device 100.
In some embodiments, the control apparatus 100 may be a remote controller, and the communication between the remote controller and the display device includes an infrared protocol communication or a bluetooth protocol communication, and other short-distance communication methods, and controls the display device 200 in a wireless or 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.
In some embodiments, the smart device 300 (e.g., mobile terminal, tablet, computer, laptop, etc.) may also be used to control the display device 200. For example, the display device 200 is controlled using an application program running on the smart device.
In some embodiments, the display device 200 may also be controlled in a manner other than the control apparatus 100 and the smart device 300, for example, the voice command control of the user may be directly received by a module configured inside the display device 200 to obtain a voice command, or may be received by a voice control device provided outside the display device 200.
In some embodiments, the display device 200 is also in data communication with a server 400. The display device 200 may be allowed to be communicatively connected through a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 400 may provide various contents and interactions to the display apparatus 200. The server 400 may be a cluster or a plurality of clusters, and may include one or more types of servers.
Fig. 2 exemplarily shows a block diagram of a configuration of the control apparatus 100 according to an exemplary embodiment. As shown in fig. 2, the control device 100 includes a controller 110, a communication interface 130, a user input/output interface 140, a memory, and a power supply. The control apparatus 100 may receive an input operation instruction from a user and convert the operation instruction into an instruction recognizable and responsive by the display device 200, serving as an interaction intermediary between the user and the display device 200.
Fig. 3 shows a hardware configuration block diagram of the display apparatus 200 according to an exemplary embodiment.
In some embodiments, the display apparatus 200 includes at least one of a tuner demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, a user interface.
In some embodiments the controller comprises a processor, a video processor, an audio processor, a graphics processor, a RAM, a ROM, a first interface to an nth interface for input/output.
In some embodiments, the display 260 includes a display screen component for presenting a picture, and a driving component for driving an image display, a component for receiving an image signal from the controller output, performing display of video content, image content, and a menu manipulation interface, and a user manipulation UI interface.
In some embodiments, the display 260 may be a liquid crystal display, an OLED display, and a projection display, and may also be a projection device and a projection screen.
In some embodiments, communicator 220 is a component for communicating with external devices or servers according to various communication protocol types. For example: the communicator may include at least one of a Wifi module, a bluetooth module, a wired ethernet module, and other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The display apparatus 200 may establish transmission and reception of control signals and data signals with the external control apparatus 100 or the server 400 through the communicator 220.
In some embodiments, the user interface may be configured to receive control signals for controlling the apparatus 100 (e.g., an infrared remote control, etc.).
In some embodiments, the detector 230 is used to collect signals of the external environment or interaction with the outside. For example, detector 230 includes a light receiver, a sensor for collecting ambient light intensity; alternatively, the detector 230 includes an image collector, such as a camera, which may be used to collect external environment scenes, attributes of the user, or user interaction gestures, or the detector 230 includes a sound collector, such as a microphone, which is used to receive external sounds.
In some embodiments, the external device interface 240 may include, but is not limited to, the following: high Definition Multimedia Interface (HDMI), analog or data high definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, and the like. The interface may be a composite input/output interface formed by the plurality of interfaces.
In some embodiments, the tuner demodulator 210 receives broadcast television signals via wired or wireless reception, and demodulates audio/video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.
In some embodiments, the controller 250 and the modem 210 may be located in different separate devices, that is, the modem 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.
In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 controls the overall operation of the display apparatus 200. For example: in response to receiving a user command for selecting a UI object to be displayed on the display 260, the controller 250 may perform an operation related to the object selected by the user command.
In some embodiments, the object may be any one of selectable objects, such as a hyperlink, an icon, or other actionable control. The operations related to the selected object are: displaying an operation connected to a hyperlink page, document, image, or the like, or performing an operation of a program corresponding to the icon.
In some embodiments the controller comprises at least one of a Central Processing Unit (CPU), a video processor, an audio processor, a Graphics Processing Unit (GPU), a RAM Random Access Memory (RAM), a ROM (Read-Only Memory), a first to nth interface for input/output, a communication Bus (Bus), and the like.
A CPU processor. For executing operating system and application program instructions stored in the memory, and executing various application programs, data and contents according to various interactive instructions receiving external input, so as to finally display and play various audio-video contents. The CPU processor may include a plurality of processors. E.g. comprising a main processor and one or more sub-processors.
In some embodiments, a graphics processor for generating various graphics objects, such as: icons, operation menus, user input instruction display graphics, and the like. The graphic processor comprises an arithmetic unit, which performs operation by receiving various interactive instructions input by a user and displays various objects according to display attributes; the system also comprises a renderer for rendering various objects obtained based on the arithmetic unit, wherein the rendered objects are used for being displayed on a display.
In some embodiments, the video processor is configured to receive an external video signal, and perform video 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 signal that can be displayed or played on the direct display device 200.
In some embodiments, the video processor includes a demultiplexing module, a video decoding module, an image synthesis module, a frame rate conversion module, a display formatting module, and the like. The demultiplexing module is used for demultiplexing the input audio and video data stream. And 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. And the frame rate conversion module is used for converting the frame rate of the input video. And the display formatting module is used for converting the received video output signal after the frame rate conversion, and changing the signal to be in accordance with the signal of the display format, such as an output RGB data signal.
In some embodiments, the audio processor is configured to receive an external audio signal, decompress and decode the received audio signal according to a standard codec protocol of the input signal, and perform noise reduction, digital-to-analog conversion, and amplification processing to obtain an audio signal that can be played in the speaker.
In some embodiments, a user may enter user commands on a Graphical User Interface (GUI) displayed on display 260, and the user input interface receives the user input commands through the Graphical User Interface (GUI). Alternatively, the user may input the user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through the sensor.
In some embodiments, a "user interface" is a media interface for interaction and information exchange between an application or operating system and a user that enables conversion between an internal form of information and a form that is acceptable to the user. A commonly used presentation form of the User Interface is a Graphical User Interface (GUI), which refers to a User Interface related to computer operations and displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in the display screen of the electronic device, where the control may include a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc.
In some embodiments, a system of a display device may include a Kernel (Kernel), a command parser (shell), a file system, and an application program. The kernel, shell, and file system together make up the basic operating system structure that allows users to manage files, run programs, and use the system. After power-on, the kernel is started, kernel space is activated, hardware is abstracted, hardware parameters are initialized, and virtual memory, a scheduler, signals and interprocess communication (IPC) are operated and maintained. And after the kernel is started, loading the Shell and the user application program. The application program is compiled into machine code after being started, and a process is formed.
Referring to fig. 4, in some embodiments, the system is divided into four layers, which are an Application (Applications) layer (abbreviated as "Application layer"), an Application Framework (Application Framework) layer (abbreviated as "Framework layer"), an Android runtime (Android runtime) and system library layer (abbreviated as "system runtime library layer"), and a kernel layer from top to bottom.
In some embodiments, at least one application program runs in the application program layer, and the application programs may be windows (windows) programs carried by an operating system, system setting programs, clock programs or the like; or an application developed by a third party developer. In particular implementations, the application packages in the application layer are not limited to the above examples.
The framework layer provides an Application Programming Interface (API) and a programming framework for the application. The application framework layer includes a number of predefined functions. The application framework layer acts as a processing center that decides to let the applications in the application layer act. The application program can access the resources in the system and obtain the services of the system in execution through the API interface.
As shown in fig. 4, in the embodiment of the present application, the application framework layer includes a manager (Managers), a Content Provider (Content Provider), and the like, where the manager includes at least one of the following modules: an Activity Manager (Activity Manager) is used for interacting with all activities running in the system; the Location Manager (Location Manager) is used for providing the system service or application with the access of the system Location service; a Package Manager (Package Manager) for retrieving various information related to an application Package currently installed on the device; a Notification Manager (Notification Manager) for controlling display and clearing of Notification messages; a Window Manager (Window Manager) is used to manage the icons, windows, toolbars, wallpapers, and desktop components on a user interface.
In some embodiments, the activity manager is used to manage the lifecycle of the various applications as well as general navigational fallback functions, such as controlling exit, opening, fallback, etc. of the applications. The window manager is used for managing all window programs, such as obtaining the size of a display screen, judging whether a status bar exists, locking the screen, intercepting the screen, controlling the change of the display window (for example, reducing the display window, displaying a shake, displaying a distortion deformation, and the like), and the like.
In some embodiments, the system runtime layer provides support for the upper layer, i.e., the framework layer, and when the framework layer is used, the android operating system runs the C/C + + library included in the system runtime layer to implement the functions to be implemented by the framework layer.
In some embodiments, the kernel layer is a layer between hardware and software. As shown in fig. 4, the core layer includes at least one of the following drivers: audio drive, display driver, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (like fingerprint sensor, temperature sensor, pressure sensor etc.) and power drive etc..
The application provides a display device, including a communicator and a controller. Wherein the communicator is configured to receive a channel searching request from a user terminal. The controller is configured to: carrying out full-band search on the dtv signals, and recording the physical channel number or frequency range of the searched frequency point with successful frequency locking; and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal.
For the display device of the present application, the present application also provides a channel searching method, as shown in fig. 5, the method includes the following steps:
s100, receiving a channel searching request from a user side;
s200, carrying out full-band search on the dtv signal, and recording the physical channel number of the searched frequency point with successful frequency locking;
s300, skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal.
Only one of the dtv and atv signals is possible to be carried in a certain frequency point within the bandwidth, and the two signals are not carried at the same time. In the application, by using the characteristic of the frequency points, when a channel is searched by using a dtv + atv channel searching mode, a dtv signal is searched first, and if frequency locking is successful at a certain frequency point, the frequency point is directly skipped when a atv signal is searched, so that the channel searching efficiency is improved, and the user experience is also improved.
Of course, in a specific using process, different combinations exist, and a specific channel searching process is different. The following specifically describes, by way of example, a specific implementation process of the channel searching method of the present application.
Example one, take the channel searching process of north american market television antenna interface signal as an example. Table 1 is a table of north american market television antenna segment physical channel data.
Table 1 shows the data table of north american market television antenna segment physical channel
| Antenna | DTV | ATV |
| Channel Numbers | freq(MHz) | freq(MHz) |
| 2 | 57 | 55.25 |
| 3 | 63 | 61.25 |
| 4 | 69 | 67.25 |
| 5 | 79 | 77.25 |
| 6 | 85 | 83.25 |
| 7 | 177 | 175.25 |
| 8 | 183 | 181.25 |
| 9 | 189 | 187.25 |
| 10 | 195 | 193.25 |
| 11 | 201 | 199.25 |
| 12 | 207 | 205.25 |
| 13 | 213 | 211.25 |
| .. | .. | .. |
| 69 | 803 | 801.25 |
As can be seen from table 1 above, the north american market is more specific, the physical channel number of the antenna segment is from 2 to 69, the bandwidth is 6M, the frequency point value corresponding to each physical channel is fixed, and the frequency point value of each physical channel is atv frequency point value +1.75 Mhz.
As shown in fig. 6, the channel searching process for north american market television antenna interface signals specifically includes the following steps:
s100, receiving a channel searching request from a user side;
s200, performing full-band search on the dtv signal, and recording a physical channel number where the searched frequency point with successfully locked frequency is located, in this example, the step specifically includes:
s210, starting a dtv channel search, and taking a first frequency point in a frequency point map table as a target frequency point;
s220, judging whether the dtv channel searching is finished or not,
s230, if the dtv channel searching is not finished, locking the current target frequency point, and judging whether the frequency locking is successful;
s231, if the frequency locking is successful, recording the physical channel number of the current target frequency point into a skip list B;
s232, if the frequency locking is not successful, the next step is carried out;
s240, traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and returning to the step S220;
s250, if the dtv channel searching is finished, ending the dtv channel searching;
s300, skipping a frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal, wherein in the embodiment, the step specifically includes:
s310, starting atv channel searching, and taking the first frequency point on the frequency point map as a target frequency point;
s320, judging atv whether the channel searching is finished,
s330, if the atv channel searching is not finished, judging whether the physical channel number of the current target frequency point is recorded in the skip list B,
s340, if the physical channel number of the current target frequency point is recorded in the skip list B, skipping the current target frequency point;
s350, if the physical channel number of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
s360, traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and returning to the step S320;
and S370, if the atv channel searching is finished, finishing the channel searching.
Example two, take the channel searching process of north american market television cable interface signals as an example. Table 2 is a table of north american market television cable segment physical channel data.
Table 2 is a table of cable segment physical channel data for north american market television
As can be seen from table 2 above, the physical channel number of the Cable segment is from 1 to 135, the bandwidth is 6M, the frequency point value corresponding to each physical channel is fixed, but slightly different from the antenna segment, and for different regions (states), the adopted Cable standards are different, and the main frequency point settings include STD (Standard Cable TV signals) frequency point settings and HRC (Harmonic Related Carrier). For each state city, only one of the criteria is generally used, and multiple annotations are not mixed. Therefore, the optimization of cable segment channel searching can be realized by adding a standard check flow besides the antenna segment, if frequency locking is successful under a certain frequency point, the adopted standard is fixed, and the channel searching of subsequent frequency points can be realized by adopting the standard.
As shown in fig. 7, the channel searching process of the north american market television cable interface signal specifically includes the following steps.
S100, receiving a channel searching request from a user side.
And S200, carrying out full-band search on the dtv signal, and recording the physical channel number of the frequency point where the searched frequency locking succeeds, wherein in the example, the step S200 specifically comprises the following steps.
S210, judging a setting mode of the frequency point, wherein the setting mode of the frequency point comprises an STD and an HRC, and judging whether the setting mode of the frequency point is the STD;
in this example, the setting mode of the frequency point is determined, and the setting model of the frequency point includes an STD and an HRC, which specifically includes:
taking the STD frequency point corresponding to the first frequency point in the frequency point map table as a predicted frequency point;
frequency locking is carried out to predict the frequency point, if the frequency locking is successful, the frequency point setting mode is STD, and the judgment process of the frequency point setting mode is finished; if the frequency locking is not successful, performing frequency locking on the HRC frequency point corresponding to the predicted frequency point, if the frequency locking is successful, setting the frequency point setting mode to be HRC, and finishing the judgment process of the frequency point setting mode; if the frequency locking is not successful, traversing the STD frequency point corresponding to the next frequency point in the frequency point map table as a prediction frequency point, and repeating the step until the frequency locking is successful.
S220, starting a dtv channel search, and taking a first frequency point in a frequency point map table in a corresponding frequency point setting mode as a target frequency point;
s230, judging whether the dtv channel searching is finished,
s240, if dtv channel searching is not finished, then locking the current target frequency point, and judging whether the frequency locking is successful,
s241, if the frequency locking is successful, recording the physical channel number of the target frequency point into a skip list B;
s242, if the frequency locking is not successful, the next step is carried out;
s250, traversing the frequency point map table, acquiring the next frequency point in the frequency point map table under the corresponding frequency point setting mode, taking the frequency point as a target frequency point, and returning to the step S230;
and S260, if the dtv channel searching is finished, finishing the dtv channel searching.
S300, skipping a frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal, wherein in the embodiment, the step specifically includes:
s310, starting atv channel searching, and taking the first frequency point in the frequency point map table under the corresponding frequency point setting mode as a target frequency point;
s320, judging atv whether the channel searching is finished,
s330, if the atv channel searching is not finished, judging whether the physical channel number of the current target frequency point is recorded in the skip list B,
s340, if the physical channel number of the current target frequency point is recorded in the skip list B, skipping the current target frequency point;
s350, if the physical channel number of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
s360, traversing the frequency point map table, acquiring the next frequency point in the frequency point map table under the corresponding frequency point setting mode, taking the frequency point as a target frequency point, and returning to the step S330;
s370, if the atv channel searching is finished, ending the channel searching;
example three, take the channel searching process of EM market tv as an example. As shown in fig. 8, the channel searching process of EM market tv specifically includes the following steps.
S100, receiving a channel searching request from a user side.
S200, carrying out full-band search on the dtv signal, and recording the frequency range of the searched frequency point where the frequency locking is successful, wherein in the example, the step specifically comprises the following steps:
s210, starting a dtv channel search, and taking a first frequency point in a frequency point map table as a target frequency point;
s220, judging whether the dtv channel searching is finished or not,
s230, if the dtv channel searching is not finished, locking the current target frequency point, and judging whether the frequency locking is successful;
s231, if the frequency locking is successful, recording a frequency range in which a current target frequency point is located into a skip list B, for example, the target frequency point is 474Mhz, and the recorded frequency range is [470Mhz, 478Mhz ];
s232, if the frequency locking is not successful, the next step is carried out;
s240, traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and returning to the step S220;
s250, if the dtv channel searching is finished, ending the dtv channel searching;
s300, skipping a frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal, wherein in the embodiment, the step specifically includes:
s310, starting atv channel searching, and taking the minimum frequency point on the frequency point map as a target frequency point;
s320, judging atv whether the channel searching is finished,
s330, if the atv channel searching is not finished, judging whether the frequency range of the current target frequency point is recorded in the skip list B,
s340, if the frequency range of the current target frequency point is recorded in the skip list B, skipping the current target frequency point;
s350, if the frequency range of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
s360, accumulating a preset step length for the current target frequency point to obtain the next target frequency point, and returning to the step S320;
for the analog television, the central frequency point is not fixed as the central frequency point of the north american market television, so in this example, the channels are searched gradually according to the step length; of course, the frequency map tables of each country have slight differences, for example, the bandwidth is 6M, 7M or 8M, so the step length of the preset step length added in the operation can be adjusted accordingly according to the actual situation.
And S370, if the atv channel searching is finished, finishing the channel searching.
In order to measure the channel searching efficiency of the channel searching method of the present application, table 3 shows the channel searching time lengths of different tv types respectively at the antenna interface signal and the cable interface signal.
Table 3 shows the channel searching performance data of different TV types
| Model type | Automatic channel searching for Antenna | Cable automatic searching station | Total up to |
| roko | 1 minute 35 seconds/1 minute 37 seconds | 8 min 05 sec/8 min 05 sec | 9 min 40 sec/9 min 42 sec |
| 6886us(SI2151) | 1 minute 51 second/1 minute 52 second | 4 min 24 s/4 min 25 s | 6 min 15 s/6 min 17 s |
| 6683us(MXL661) | 2 min 15 s/2 min 11 s | 5 min 05 sec/5 min 08 sec | About 7 minutes and 20 seconds |
| 9900us(SI2151) | 1 minute 08 seconds | 2 minutes and 50 seconds | About 3 minutes 58 seconds |
As can be seen from the data in table 3, the channel searching performance of the model 9900us is greatly improved.
The application discloses a display device and a channel searching method, wherein full-band searching is carried out on a dtv signal by utilizing the characteristic that a certain frequency point can only carry one of a dtv signal or an atv signal in a bandwidth range, and the searched frequency point with successful frequency locking is recorded; and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal. When the channel searching method is used for searching the television channels, the channel searching mode of dtv + atv is adopted, on one hand, the comprehensiveness of channel searching is ensured, and on the other hand, for the frequency point with successful frequency locking in the dtv channel searching process, the frequency point is skipped when channel searching is carried out at atv, so that the channel searching efficiency and the user experience are improved. When the channel searching method is used for searching the television channels, the channel searching mode of dtv + atv is adopted, on one hand, the comprehensiveness of channel searching is ensured, and on the other hand, for the frequency point with successful frequency locking in the dtv channel searching process, the frequency point is skipped when channel searching is carried out at atv, so that the channel searching efficiency and the user experience are improved.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is directed to embodiments of the present invention, and it is understood that various modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention.
Claims (9)
1. A display device, comprising:
a communicator configured to receive a channel searching request from a user terminal;
a controller configured to: carrying out full-band search on the dtv signals, and recording the physical channel number or frequency range of the searched frequency point with successful frequency locking; and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal.
2. A method for searching channels is characterized by comprising the following steps:
receiving a channel searching request from a user side;
carrying out full-band search on the dtv signals, and recording the physical channel number or frequency range of the searched frequency point with successful frequency locking;
and skipping the frequency point with successful frequency locking in the dtv channel searching process, and searching for the atv signal.
3. The channel searching method according to claim 2, wherein the step of performing full-band search on the dtv signal and recording the physical channel number where the frequency point with the searched frequency locking success is located specifically comprises:
starting a dtv channel search, and taking a first frequency point in a frequency point map table as a target frequency point;
judging whether the dtv channel searching is finished or not, if not, locking the current target frequency point, judging whether the frequency locking is successful or not, and if so, recording the physical channel number of the current target frequency point into a skip list B; if the frequency locking is not successful, the next step is carried out;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and repeating the previous step;
and if the dtv channel searching is finished, ending the dtv channel searching.
4. The channel searching method according to claim 2, wherein skipping frequency points where frequency locking is successful in the dtv channel searching process, and searching for the atv signal specifically comprises:
starting atv channel searching, and taking the first frequency point on the frequency point map as a target frequency point;
judging atv whether channel searching is finished, if atv channel searching is not finished, judging whether the physical channel number of the current target frequency point is recorded in a skip list B, and if the physical channel number of the current target frequency point is recorded in the skip list B, skipping the current target frequency point; if the physical channel number of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and repeating the previous step;
if atv channel searching is finished, the channel searching is finished.
5. The channel searching method according to claim 2, wherein the step of performing full-band search on the dtv signal and recording the physical channel number where the frequency point with the searched frequency locking success is located specifically comprises:
judging a setting mode of the frequency point, wherein the setting mode of the frequency point comprises an STD and an HRC;
starting a dtv channel search, and taking a first frequency point in a corresponding frequency point setting mode in a frequency point map table as a target frequency point;
judging whether the dtv channel searching is finished or not, if not, locking the current target frequency point, judging whether the frequency locking is successful or not, and if so, recording the physical channel number of the target frequency point into a skip list B; if the frequency locking is not successful, the next step is carried out;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table in a corresponding frequency point setting mode, taking the frequency point as a target frequency point, and repeating the previous step;
and if the dtv channel searching is finished, ending the dtv channel searching.
6. The channel searching method according to claim 5, wherein skipping frequency points where frequency locking is successful in the dtv channel searching process, and searching for the atv signal specifically comprises:
starting atv channel searching, and taking the first frequency point in the frequency point map table under the corresponding frequency point setting mode as a target frequency point;
judging atv whether channel searching is finished, if atv channel searching is not finished, judging whether the physical channel number of the current target frequency point is recorded in a skip list B, and if the physical channel number of the current target frequency point is recorded in the skip list B, skipping the current target frequency point; if the physical channel number of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table in a corresponding frequency point setting mode, taking the frequency point as a target frequency point, and repeating the previous step;
if atv channel searching is finished, the channel searching is finished.
7. The channel searching method according to claim 5, wherein the setting mode of the frequency point is determined, the setting mode of the frequency point includes STD and HRC, specifically including,
taking the STD frequency point corresponding to the first frequency point in the frequency point map table as a predicted frequency point;
frequency locking is carried out to predict the frequency point, if the frequency locking is successful, the frequency point setting mode is STD, and the judgment process of the frequency point setting mode is finished; if the frequency locking is not successful, performing frequency locking on the HRC frequency point corresponding to the predicted frequency point, if the frequency locking is successful, setting the frequency point setting mode to be HRC, and finishing the judgment process of the frequency point setting mode; if the frequency locking is not successful, traversing the STD frequency point corresponding to the next frequency point in the frequency point map table as a prediction frequency point, and repeating the step until the frequency locking is successful.
8. The channel searching method according to claim 2, wherein the step of performing full-band search on the dtv signal and recording a frequency range where a searched frequency point with a successful frequency locking is located specifically comprises:
starting a dtv channel search, and taking a first frequency point in a frequency point map table as a target frequency point;
judging whether the dtv channel searching is finished or not, if the dtv channel searching is not finished, locking the current target frequency point, and judging whether the frequency locking is successful or not; if the frequency locking is successful, recording the frequency range of the current target frequency point into a skip list B; if the frequency locking is not successful, the next step is carried out;
traversing the frequency point map table, acquiring the next frequency point in the frequency point map table, taking the frequency point as a target frequency point, and repeating the previous step;
and if the dtv channel searching is finished, ending the dtv channel searching.
9. The channel searching method according to claim 8, wherein skipping frequency points where frequency locking is successful in the dtv channel searching process, and searching for the atv signal specifically comprises:
starting atv channel searching, and taking the minimum frequency point on the frequency point map as a target frequency point;
judging atv whether channel searching is finished, if atv channel searching is not finished, judging whether the frequency range of the current target frequency point is recorded in a skip list B, and if the frequency range of the current target frequency point is recorded in the skip list B, skipping the current target frequency point; if the frequency range of the current target frequency point is not recorded in the skip list B, locking the current target frequency point;
accumulating a preset step length for the current target frequency point to obtain the next target frequency point, and repeating the previous step;
if atv channel searching is finished, the channel searching is finished.
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| CN202110932457.6A CN113490042B (en) | 2021-08-13 | 2021-08-13 | Display equipment and channel searching method |
| CN202280050133.2A CN117795966A (en) | 2021-08-10 | 2022-08-10 | Channel searching method and display device |
| PCT/CN2022/111526 WO2023016499A1 (en) | 2021-08-10 | 2022-08-10 | Method for searching for channels and display device |
| US18/437,470 US20240187682A1 (en) | 2021-08-10 | 2024-02-09 | Method for searching for channels and display apparatus |
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