Video playing device and video playing method

Abstract

The invention provides video playing equipment and a video playing method, and relates to the technical field of terrestrial digital televisions, and the video playing equipment comprises a DTMB signal obtaining module, a media signal obtaining module and a signal output module which are electrically connected with a main control module; the DTMB signal acquisition module is used for acquiring a DTMB signal, amplifying the DTMB signal and sending the DTMB signal to the main control module; the main control module is used for sending the amplified DTMB signal to the signal output module if the signal intensity of the amplified DTMB signal is greater than a preset intensity threshold value; if not, sending a media signal acquisition request to a media signal acquisition module; the media signal acquisition module is used for sending a media signal to the main control module; the main control module is used for sending a media signal to the signal output module; and the signal output module is used for outputting media information according to the DTMB signal or the media signal. According to the invention, intelligent switching between a traditional DTMB signal and a network media signal is realized.

Description

Technical Field

[0001] This application relates to the field of terrestrial digital television technology, and more specifically, to a video playback device and a video playback method. Background Technology

[0002] Current mainstream video consumption models heavily rely on streaming media services. However, due to limitations in the internet environment, video playback is hindered in areas with no or weak network coverage. Although my country has established a widely covered terrestrial digital multimedia broadcasting network (DTMB) that provides stable and free digital television program signals, existing equipment supporting DTMB signal reception has weak signal reception capabilities and cannot intelligently switch signal sources according to environmental conditions, making it difficult to meet users' viewing needs. Summary of the Invention

[0003] In view of the above, the purpose of this application is to overcome the shortcomings of the prior art and provide a video playback device and a video playback method. This application provides the following technical solution: In a first aspect, this application provides a video playback device, the video playback device comprising: a DTMB signal acquisition module, a media signal acquisition module, a main control module and a signal output module, wherein the DTMB signal acquisition module, the media signal acquisition module and the signal output module are electrically connected to the main control module respectively; The DTMB signal acquisition module is used to acquire the DTMB signal, amplify the DTMB signal, and send the amplified DTMB signal to the main control module. The main control module is used to determine whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold; if so, it sends the amplified DTMB signal to the signal output module; if not, it sends a media signal acquisition request to the media signal acquisition module. The media signal acquisition module is used to send a media signal to the main control module when it receives the media signal acquisition request; The main control module is also used to send the media signal to the signal output module; The signal output module is used to output media information based on the DTMB signal or the media signal, wherein the media information includes audio information and video information.

[0004] In one embodiment, the DTMB signal includes: a first DTMB signal or a second DTMB signal, and the step of determining whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold includes: Determine whether the signal strength of the first DTMB signal and the signal strength of the second DTMB signal are both greater than the preset strength threshold. If both are greater, then determine that the signal strength of the amplified DTMB signal is greater than the preset strength threshold. If the first DTMB signal is less than or equal to the preset strength threshold, or the second DTMB signal is less than or equal to the preset strength threshold, then it is determined that the signal strength of the amplified DTMB signal is less than or equal to the preset strength threshold.

[0005] In one embodiment, the DTMB signal acquisition module includes: a first acquisition unit and a channel switching unit. When the channel switching unit is in a first conducting state, the first acquisition unit is electrically connected to the channel switching unit, and the channel switching unit is also electrically connected to the main control module. The first acquisition unit is used to acquire the first DTMB signal, amplify the first DTMB signal, and send the amplified first DTMB signal to the main control module. The main control module is also used to send a control signal to the channel switching unit if the signal strength of the first DTMB signal is less than or equal to the preset strength threshold. The channel switching unit is used to switch from the first conduction state to the second conduction state when the control signal is received.

[0006] In one embodiment, the first acquisition unit includes: a first receiving antenna and a first signal amplification circuit, wherein the first receiving antenna is electrically connected to the first signal amplification circuit; The first receiving antenna is used to acquire the first DTMB signal; The first signal amplification circuit is used to amplify the first DTMB signal.

[0007] In one embodiment, the DTMB signal acquisition module further includes: a second acquisition unit, which is electrically connected to the channel switching unit when the channel switching unit is in the second on state; The second acquisition unit is used to acquire the second DTMB signal, amplify the second DTMB signal, and send the amplified second DTMB signal to the main control module.

[0008] In one embodiment, the second acquisition unit includes: a second receiving antenna and a second signal amplification circuit, wherein the second receiving antenna is electrically connected to the second signal amplification circuit; The second receiving antenna is used to acquire the second DTMB signal; The second signal amplification circuit is used to amplify the second DTMB signal.

[0009] In one embodiment, the main control module is further configured to, before sending a control signal to the channel switching unit, acquire the presence signal of the second receiving antenna and determine whether the second receiving antenna is in a preset position based on the presence signal.

[0010] In one embodiment, the DTMB signal acquisition module further includes a signal modulation unit, which is electrically connected to the main control module and the channel switching unit respectively. The signal modulation unit is used to acquire the amplified DTMB signal, perform frequency conversion processing on the amplified DTMB signal, adjust the amplified DTMB signal to a preset frequency, and then send it to the main control module.

[0011] In one embodiment, the media signal acquisition module includes: a communication unit, which is electrically connected to the main control module; The communication unit is used to obtain the media signal from the streaming media platform and send the media signal to the main control module when it receives the media signal acquisition request from the main control module.

[0012] Secondly, this application provides a video playback method, applied to the video playback device described in the first aspect, the method comprising: The DTMB signal acquisition module acquires the DTMB signal, amplifies the DTMB signal, and sends the amplified DTMB signal to the main control module. The main control module determines whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold; if so, it sends the amplified DTMB signal to the signal output module; if not, it sends a media signal acquisition request to the media signal acquisition module. When the media signal acquisition request is received, the media signal acquisition module sends a media signal to the main control module; The main control module sends the media signal to the signal output module; The signal output module outputs media information based on the DTMB signal or the media signal, and the media information includes audio information and video information.

[0013] The video playback device and video playback method provided in this application embodiment include: a DTMB signal acquisition module, a media signal acquisition module, a main control module, and a signal output module. The DTMB signal acquisition module, the media signal acquisition module, and the signal output module are electrically connected to the main control module. The DTMB signal acquisition module is used to acquire a DTMB signal, amplify the DTMB signal, and send the amplified DTMB signal to the main control module. The main control module is used to determine whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold. If yes, it sends the amplified DTMB signal to the signal output module; if no, it sends a media signal acquisition request to the media signal acquisition module. The media signal acquisition module is used to send a media signal to the main control module when it receives the media signal acquisition request. The main control module is also used to send the media signal to the signal output module. The signal output module is used to output media information based on the DTMB signal or the media signal, wherein the media information includes audio information and video information. This application enables intelligent switching between traditional DTMB signals and network media signals, expanding signal sources while ensuring stable signal reception. This guarantees users a continuous, high-quality video viewing experience in different scenarios, while fully utilizing public DTMB resources to reduce user viewing costs.

[0014] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of a video playback device provided in an embodiment of this application is shown; Figure 2 Another structural schematic diagram of the video playback device provided in an embodiment of this application is shown; Figure 3 A circuit diagram of the first amplifier circuit provided in an embodiment of this application is shown; Figure 4 A circuit diagram of the second amplifier circuit provided in an embodiment of this application is shown; Figure 5This paper shows another structural schematic diagram of the video playback device provided in an embodiment of this application; Figure 6 A flowchart illustrating a video playback method provided in an embodiment of this application is shown.

[0017] Explanation of key component symbols: 100 - Video playback device; 110 - DTMB signal acquisition module; 111 - First acquisition unit; 112 - Second acquisition unit; 113 - Channel switching unit; 114 - Signal modulation unit; 120 - Media signal acquisition module; 130 - Main control module; 140 - Signal output module. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Example 1 Currently, the mainstream video consumption model is online subscription streaming services. However, this model suffers from drawbacks such as increased financial burden due to membership or on-demand fees, fragmented viewing experiences, and high dependence on network conditions, meaning users cannot watch properly in areas without network access or with poor signal. Meanwhile, my country's widely covered free terrestrial digital multimedia broadcasting network (DTMB) serves as an important public cultural service infrastructure. However, existing devices supporting its reception are mostly fixed-location home or vehicle televisions, which are inconvenient to carry. The few portable DTMB receivers available suffer from weak signal reception, limited signal reception functionality (only able to receive DTMB signals), and low intelligence (unable to intelligently select the best signal source based on environmental conditions), failing to meet users' viewing needs. For further information, please refer to [link / reference needed]. Figure 1 This application provides a video playback device 100, including: a DTMB signal acquisition module 110, a media signal acquisition module 120, a main control module 130, and a signal output module 140, wherein the DTMB signal acquisition module 110, the media signal acquisition module 120, and the signal output module 140 are electrically connected to the main control module 130 respectively; The DTMB signal acquisition module 110 is used to acquire the DTMB signal, amplify the DTMB signal, and send the amplified DTMB signal to the main control module 130. The main control module 130 is used to determine whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold; if yes, it sends the amplified DTMB signal to the signal output module 140; if no, it sends a media signal acquisition request to the media signal acquisition module 120. The media signal acquisition module 120 is used to send a media signal to the main control module 130 when it receives the media signal acquisition request; The main control module 130 is also used to send the media signal to the signal output module 140; The signal output module 140 is used to output media information based on the DTMB signal or the media signal, wherein the media information includes audio information and video information.

[0022] In this embodiment, the main control module 130, together with the DTMB signal acquisition module 110, the media signal acquisition module 120, and the signal output module 140, achieves intelligent switching of multiple signal sources and output of media information. Specifically, the DTMB signal acquisition module 110 acquires DTMB signals, amplifies them to improve signal quality, and then transmits them to the main control module 130. The main control module 130 then determines in real time whether the amplified DTMB signal strength is greater than a preset strength threshold, which is set based on the requirements for stable playback in different scenarios. If the DTMB signal strength is greater than the preset strength threshold, the DTMB signal is transmitted to the signal output module 140. If the DTMB signal strength is insufficient, such as in remote suburban areas or indoors where the DTMB signal is weak (less than or equal to a preset strength threshold), the main control module 130 sends an acquisition request to the media signal acquisition module 120. The media signal acquisition module 120 then acquires the media signal from the network streaming media platform through a media signal acquisition unit, such as a Wi-Fi or Bluetooth module, and transmits the media signal back to the main control module 130. Finally, the main control module 130 sends the DTMB signal or media signal to the signal output module 140, which outputs audio and video information to enable video content playback.

[0023] Understandably, this approach makes full use of existing DTMB public signal resources and solves the problem of traditional devices being unable to watch videos when there is no DTMB signal or the signal is weak. It enables automatic switching between free viewing and paid media, ensuring a continuous viewing experience for users in different scenarios.

[0024] In one embodiment, the DTMB signal includes: a first DTMB signal or a second DTMB signal, and the step of determining whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold includes: Determine whether the signal strength of the first DTMB signal and the signal strength of the second DTMB signal are both greater than the preset strength threshold. If both are greater, then determine that the signal strength of the amplified DTMB signal is greater than the preset strength threshold. If the first DTMB signal is less than or equal to the preset strength threshold, or the second DTMB signal is less than or equal to the preset strength threshold, then it is determined that the signal strength of the amplified DTMB signal is less than or equal to the preset strength threshold.

[0025] In this embodiment, please refer to Figure 2The DTMB signal acquisition module 110 includes a first acquisition unit 111, a second acquisition unit 112, and a channel switching unit 113. By controlling the channel switching unit 113 to enter different conduction modes, the first acquisition unit 111 can be connected to the main control module 130, or the second acquisition unit 112 can be connected to the main control module 130. In the initial state, the first acquisition unit 111 is connected to the main control module 130. The first acquisition unit 111 acquires the first DTMB signal, amplifies it, and outputs it to the main control module 130. The main control module 130 determines whether the signal strength of the amplified first DTMB signal is greater than a preset strength threshold. If not, the main control module 130 controls the channel switching unit 113 to switch from the first conduction mode to the second conduction mode, thereby disconnecting the first acquisition unit 111 from the main control module 130. The second acquisition unit 112 is electrically connected to the main control module 130. At this time, the second acquisition unit 112 acquires the second DTMB signal, amplifies it, and outputs it to the main control module 130. If the main control module 130 determines that the amplified second DTMB signal is also less than or equal to the preset strength threshold, then it can be determined that the DTMB signal strength at this time is less than or equal to the preset strength threshold.

[0026] It is understandable that by setting the first acquisition unit 111 and the second acquisition unit 112, different DTMB signal acquisition methods are provided, avoiding misjudgment caused by signal fluctuations due to a single acquisition method and improving the recognition accuracy of DTMB signals.

[0027] In one embodiment, the DTMB signal acquisition module 110 includes: a first acquisition unit 111 and a channel switching unit 113. When the channel switching unit 113 is in a first conducting state, the first acquisition unit 111 is electrically connected to the channel switching unit 113, and the channel switching unit 113 is also electrically connected to the main control module 130. The first acquisition unit 111 is used to acquire the first DTMB signal, amplify the first DTMB signal, and send the amplified first DTMB signal to the main control module 130; the main control module 130 is also used to send a control signal to the channel switching unit 113 if the signal strength of the first DTMB signal is less than or equal to the preset strength threshold; the channel switching unit 113 is used to switch from the first conduction state to the second conduction state when it receives the control signal.

[0028] In this embodiment, please refer to Figure 2 , Figure 2Another structural schematic diagram of the video playback device 100 provided in this application embodiment is shown. In the default state, the channel switching unit 113 is in the first conducting state. At this time, the first acquisition unit 111 is electrically connected to the main control module 130. The main control module 130 acquires the first DTMB signal after amplification through the first acquisition unit 111. Based on the signal strength of the amplified first DTMB signal, it determines whether it is necessary to switch the acquisition path of the DTMB signal, that is, switch to the second acquisition unit 112 for acquisition.

[0029] It is understandable that when the main control module 130 detects that the amplified first DTMB signal strength is less than or equal to the preset strength threshold, it sends a control signal to the channel switching unit 113 to control the channel switching unit 113 to switch from the first conduction state to the second conduction state, so as to eliminate the signal interruption caused by the signal fluctuation of a single acquisition path.

[0030] In one embodiment, the first acquisition unit 111 includes: a first receiving antenna and a first signal amplification circuit, wherein the first receiving antenna is electrically connected to the first signal amplification circuit; the first receiving antenna is used to acquire the first DTMB signal; and the first signal amplification circuit is used to amplify the first DTMB signal.

[0031] Please see Figure 3 , Figure 3 A circuit diagram of a first signal amplification circuit provided in an embodiment of this application is shown. Antenna contact J1 is connected to a first antenna via a spring structure. The first DTMB signal received by the first antenna is amplified by a transistor and output to a channel switching unit 113, which then transmits it to the main control module 130. In the diagram, Switch_RF1_IN represents the amplified first DTMB signal output to the main control module 130 via the channel switching unit 113.

[0032] In one embodiment, the DTMB signal acquisition module 110 further includes: a second acquisition unit 112, which is electrically connected to the channel switching unit 113 when the channel switching unit 113 is in the second on state; the second acquisition unit 112 is used to acquire the second DTMB signal, amplify the second DTMB signal, and send the amplified second DTMB signal to the main control module 130.

[0033] Please see again Figure 2When the channel switching unit 113 switches from the first conducting state to the second conducting state under the control of the main control module 130, the second acquisition unit 112 establishes an electrical connection with the channel switching unit 113, acquires the second DTMB signal, amplifies it, and transmits the amplified second DTMB signal to the main control module 130 for further judgment on whether the second DTMB signal strength meets the standard. Through dual signal acquisition paths, the video playback device 100 has the opportunity to receive a stable DTMB signal even in areas with poor signal, reducing the frequency of direct switching to network media mode. This fully utilizes the free DTMB public signal resources and further ensures the continuity and economy of the user's viewing experience.

[0034] In one embodiment, the second acquisition unit 112 includes: a second receiving antenna and a second signal amplification circuit, wherein the second receiving antenna is electrically connected to the second signal amplification circuit; the second receiving antenna is used to acquire the second DTMB signal; and the second signal amplification circuit is used to amplify the second DTMB signal.

[0035] Please see Figure 4 , Figure 4 A circuit diagram of the second amplifier circuit is shown. Figure 4 In addition to the second amplifier circuit, the second acquisition unit 112 also includes a DTMB high-frequency head JT1 and an optocoupler D1, used to detect whether the second receiving antenna is inserted into the designated position. Specifically, when the second receiving antenna is inserted into the designated position, the DET pin of the DTMB high-frequency head JT1 is connected to the isolation ground. At this time, the optocoupler D1 is turned on, and the ANT-DET signal is pulled up to 3.3V. The main control module 130 detects that the ANT-DET signal is high and determines that the second receiving antenna is inserted. When the second receiving antenna is not inserted into the designated position, the DET pin of the DTMB high-frequency head JT1 is floating, the optocoupler D1 is not turned on, and the ANT-DET signal is 0V. The main control module 130 detects that the ANT-DET signal is low and determines that the second receiving antenna is not inserted. The ANT-DET signal is isolated by the optocoupler D1 to ensure the integrity of the isolation ground.

[0036] It should be noted that before acquiring the second DTMB signal through the second receiving antenna, it is necessary to first determine whether the second receiving antenna is inserted into the designated position. The determination process is as described above and will not be repeated. Once it is confirmed that the second receiving antenna is inserted into the designated position, the second DTMB signal is acquired through the second receiving antenna and amplified by the transistor in the second amplifier circuit to obtain the amplified second DTMB signal. This amplified signal is then output to the channel switching unit 113 and sent to the main control module 130 through the channel switching unit 113. In the figure, Switch_RF2_IN represents the amplified second DTMB signal output to the main control module 130 through the channel switching unit 113. The first receiving antenna is an internal antenna, and the second receiving antenna is an external antenna.

[0037] In one embodiment, the main control module 130 is further configured to, before sending a control signal to the channel switching unit 113, acquire the presence signal of the second receiving antenna and determine whether the second receiving antenna is in a preset position based on the presence signal.

[0038] In this embodiment, please refer to Figure 4 When the second receiving antenna is inserted into the standard DTMB interface, the DET pin of the DTMB tuner JT1 is connected to isolation ground, the optocoupler D1 is turned on, and the ANT-DET signal is pulled up to 3.3V as the presence signal. If the second receiving antenna is not inserted into the standard DTMB interface, the DET pin of the DTMB tuner JT1 is left floating, the optocoupler D1 is not turned on, and the ANT-DET signal is pulled down to 0V as the presence signal. The main control module 130 determines whether the second receiving antenna is correctly inserted into the standard DTMB interface, i.e., whether it is in the preset position, by identifying the level state of the presence signal. Only when the channel switching unit 113 switches to the second on state and the second receiving antenna is in the preset position does the main control module 130 acquire the second DTMB signal through the second acquisition unit 112.

[0039] In one implementation, please refer to Figure 5 The DTMB signal acquisition module 110 further includes a signal modulation unit 114, which is electrically connected to the main control module 130 and the channel switching unit 113 respectively. The signal modulation unit 114 is used to acquire the amplified DTMB signal, perform frequency conversion processing on the amplified DTMB signal, adjust the amplified DTMB signal to a preset frequency, and send it to the main control module 130.

[0040] In this embodiment, when the channel switching unit 113 is in the first or second conduction state, it will transmit the amplified DTMB signal from the first acquisition unit 111 or the second acquisition unit 112 to the signal modulation unit 114. The signal modulation unit 114 performs frequency conversion processing on the amplified DTMB signal. Since the frequency range of the original DTMB radio frequency signal received by the antenna is relatively wide, and the demodulation circuit of the main control module 130 can only process intermediate frequency signals of fixed frequency, the signal modulation unit 114 will downconvert the amplified DTMB signal to a preset fixed intermediate frequency signal according to the instructions issued by the main control module 130 through the control bus such as I2C. If it meets the standard intermediate frequency required by the main control demodulation, the frequency-converted DTMB signal will be sent to the main control module 130.

[0041] Frequency conversion processing enables DTMB signals of different frequencies to be demodulated uniformly by the main control module 130, ensuring that the main control module 130 can stably and efficiently complete demodulation and decoding operations, and avoiding demodulation failure or playback abnormalities caused by signal frequency mismatch.

[0042] In one embodiment, the media signal acquisition module 120 includes: a communication unit electrically connected to the main control module 130; the communication unit is used to acquire the media signal from the streaming media platform and send the media signal to the main control module 130 when a media signal acquisition request is received from the main control module 130.

[0043] In this embodiment, when the communication unit receives a media signal acquisition request, it will activate the WIFI or Bluetooth wireless communication function, scan and connect to the wireless local area network that has saved the authentication information, and then access the streaming media platform, such as various video playback platforms, through the network to acquire the media signal from the streaming media platform, and transmit the acquired media signal back to the main control module 130, so that the main control module 130 can further send it to the signal output module 140 for playback.

[0044] It should be noted that the media signal acquisition module 120 further includes a function button, used to acquire the media signal from the streaming media platform in response to user operation when the user actively selects it. The video playback device 100 also includes a TF card interface, a USB interface, and a Type-C interface, used for expanding storage, connecting peripherals, charging, and data transmission.

[0045] The video playback device 100 provided in this application embodiment includes: a DTMB signal acquisition module 110, a media signal acquisition module 120, a main control module 130, and a signal output module 140. The DTMB signal acquisition module 110, the media signal acquisition module 120, and the signal output module 140 are electrically connected to the main control module 130. The DTMB signal acquisition module 110 is used to acquire a DTMB signal, amplify the DTMB signal, and send the amplified DTMB signal to the main control module 130. The main control module 130 is used to determine the amplified DTMB signal. If the signal strength is greater than a preset strength threshold, the amplified DTMB signal is sent to the signal output module 140; otherwise, a media signal acquisition request is sent to the media signal acquisition module 120. The media signal acquisition module 120 is used to send a media signal to the main control module 130 when it receives the media signal acquisition request. The main control module 130 is also used to send the media signal to the signal output module 140. The signal output module 140 is used to output media information based on the DTMB signal or the media signal, and the media information includes audio information and video information. This application realizes intelligent switching between traditional DTMB signals and network media signals, expands signal sources, ensures stable received signals, and guarantees that users can obtain a continuous and high-quality video viewing experience in different scenarios. At the same time, it makes full use of public DTMB resources to reduce user viewing costs.

[0046] Example 2 In addition, please see Figure 6 This application also provides a video playback method, applied to the video playback device 100 described in Embodiment 1, the method including steps S610~S650.

[0047] In step S610, the DTMB signal acquisition module 110 acquires the DTMB signal, amplifies the DTMB signal, and sends the amplified DTMB signal to the main control module 130.

[0048] In step S620, the main control module 130 determines whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold; if yes, it sends the amplified DTMB signal to the signal output module 140; if no, it sends a media signal acquisition request to the media signal acquisition module 120.

[0049] In step S630, when the media signal acquisition request is received, the media signal acquisition module 120 sends a media signal to the main control module 130.

[0050] In step S640, the main control module 130 sends the media signal to the signal output module 140.

[0051] In step S650, the signal output module 140 outputs media information based on the DTMB signal or the media signal, wherein the media information includes audio information and video information.

[0052] The video playback method provided in this application embodiment is applied to the video playback device 100 described in Embodiment 1. To avoid repetition, it will not be described again here.

[0053] This application enables intelligent switching between traditional DTMB signals and network media signals, expanding signal sources while ensuring stable signal reception. This guarantees users a continuous, high-quality video viewing experience in different scenarios, while fully utilizing public DTMB resources to reduce user viewing costs.

[0054] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A video playback device, characterized by, The video playing device comprises a DTMB signal acquisition module, a media signal acquisition module, a main control module and a signal output module, the DTMB signal acquisition module, the media signal acquisition module and the signal output module are electrically connected with the main control module respectively; The DTMB signal acquisition module is used for acquiring a DTMB signal, amplifying the DTMB signal, and sending the amplified DTMB signal to the main control module; The main control module is used for judging whether the signal strength of the amplified DTMB signal is greater than a preset intensity threshold value; if yes, the amplified DTMB signal is sent to the signal output module; if no, a media signal acquisition request is sent to the media signal acquisition module; The media signal acquisition module is used for sending a media signal to the main control module when the media signal acquisition request is received; The main control module is also used for sending the media signal to the signal output module; The signal output module is used for outputting media information according to the DTMB signal or the media signal, the media information comprising audio information and video information.

2. The video playback device of claim 1, wherein, The DTMB signal comprises a first DTMB signal or a second DTMB signal, the judgment of whether the signal strength of the amplified DTMB signal is greater than a preset intensity threshold value comprises: judging whether the signal strength of the first DTMB signal and the signal strength of the second DTMB signal are both greater than the preset intensity threshold value; if yes, it is determined that the signal strength of the amplified DTMB signal is greater than the preset intensity threshold value; if the first DTMB signal is less than or equal to the preset intensity threshold value or the second DTMB signal is less than or equal to the preset intensity threshold value, it is determined that the signal strength of the amplified DTMB signal is less than or equal to the preset intensity threshold value.

3. The video playback device of claim 2, wherein, The DTMB signal acquisition module comprises a first acquisition unit and a channel switching unit, the first acquisition unit is electrically connected with the channel switching unit when the channel switching unit is in a first conduction state, and the channel switching unit is also electrically connected with the main control module; The first acquisition unit is used for acquiring the first DTMB signal, amplifying the first DTMB signal, and sending the amplified first DTMB signal to the main control module; The main control module is also used for sending a control signal to the channel switching unit if the signal strength of the first DTMB signal is less than or equal to the preset intensity threshold value; The channel switching unit is used for switching from the first conduction state to a second conduction state when the control signal is received.

4. The video playback device of claim 3, wherein, The first acquisition unit comprises a first receiving antenna and a first signal amplification circuit, the first receiving antenna is electrically connected with the first signal amplification circuit; The first receiving antenna is used for acquiring the first DTMB signal; The first signal amplification circuit is used for amplifying the first DTMB signal.

5. The video playback device of claim 4, wherein, The DTMB signal acquisition module further comprises a second acquisition unit, which is electrically connected with the channel switching unit when the channel switching unit is in the second conducting state; The second acquisition unit is configured to acquire the second DTMB signal, amplify the second DTMB signal, and send the amplified second DTMB signal to the main control module.

6. The video playback device of claim 5, wherein, The second acquisition unit comprises a second receiving antenna and a second signal amplification circuit, and the second receiving antenna is electrically connected with the second signal amplification circuit; The second receiving antenna is configured to acquire the second DTMB signal. The second signal amplification circuit is configured to amplify the second DTMB signal.

7. The video playback device of claim 6, wherein, The main control module is further configured to acquire an in-place signal of the second receiving antenna before sending a control signal to the channel switching unit, and determine whether the second receiving antenna is in a preset position according to the in-place signal.

8. The video playback device of claim 7, wherein, The DTMB signal acquisition module further comprises a signal modulation unit, which is electrically connected with the main control module and the channel switching unit respectively; The signal modulation unit is configured to acquire the amplified DTMB signal, perform frequency conversion on the amplified DTMB signal, adjust the amplified DTMB signal to a preset frequency, and send the adjusted DTMB signal to the main control module.

9. The video playback device of any of claims 1-8, wherein, The media signal acquisition module comprises a communication unit, which is electrically connected with the main control module; The communication unit is configured to acquire the media signal from a streaming media platform when the media signal acquisition request is acquired from the main control module, and send the media signal to the main control module.

10. A video playing method, characterized in that, The method is applied to the video playing device of any one of claims 1-9, and the method comprises: The DTMB signal acquisition module acquires a DTMB signal, amplifies the DTMB signal, and sends the amplified DTMB signal to a main control module; The main control module determines whether the signal strength of the amplified DTMB signal is greater than a preset strength threshold; if yes, the main control module sends the amplified DTMB signal to a signal output module; if no, the main control module sends a media signal acquisition request to a media signal acquisition module; When the media signal acquisition request is received, the media signal acquisition module sends a media signal to the main control module; The main control module sends the media signal to the signal output module; The signal output module outputs media information according to the DTMB signal or the media signal, and the media information comprises audio information and video information.

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