WO2020098504A1 - Video switching control method and display device - Google Patents

Abstract

Disclosed is a video switching control method. The method comprises: respectively downloading, according to low play resolution and high play resolution, play start portion data and play resuming portion data of a second type of video from a server; and when a first decoder is occupied by a first type of video, first playing the play start portion data by means of a second decoder, and after playing the first type of video is completed, then switching to the first decoder to play the play resuming portion data.

Description

Video switching control method and display device

This application requires the priority of the Chinese patent application submitted to the China Patent Office on November 12, 2018, with the application number 201811338363.0 and the invention titled "a method for streaming video switching and smart TV", the entire content of which is incorporated by reference In this application.

Technical field

The present application relates to streaming media technology, in particular to a video switching control method and display device.

Background technique

With the development of streaming media technology, users have higher and higher requirements for video switching speed. Some video playback applications in the European and American markets have clear performance requirements for video switching and ad insertion. For example, some players even require that the switching time for ad insertion be within 250ms.

To meet this requirement, there must be at least two decoders in the display device. While the first decoder decodes and plays the positive film, the second channel decoder decodes the cached advertising data. Then, at the switching moment, the decoder ’s Play, start advertising. In this way, it is equivalent to downloading and demultiplexing the relevant data of the advertisement in advance, initializing the second decoder, and decoding the relevant data of the advertisement, which greatly saves the video switching time.

Since the preparation time of video data is mostly consumed in the downloading, demultiplexing, and decoding processes, the video switching operation can be controlled in a short time by using the dual-channel decoder decoding method, and the subjective experience is seamless switching.

However, as the user's demand for video clarity becomes higher and higher, for example, the resolution of the positive film is 2106p and the resolution of the advertisement is 1080p, a black screen waiting process of 1 to 2 seconds will still occur when the two are switched, which affects the user experience.

Summary of the invention

The purpose of the present application is to provide a video switching control method and a display device, so as to improve the timeliness of video switching and ensure the video playback performance of the display device.

In a first aspect, a display device is provided, including:

Display, used to display video playback screen;

The first decoder and the second decoder are used for processing the video including at least the decoding operation;

Controller, used to perform:

In the process of playing the first type of video through the first decoder, the starting part of the data corresponding to the second type of video is received from the server and distributed to the second decoder for buffering. The playback resolution of the starting part of the data is not high The highest playback resolution supported by the second decoder;

After the first type of video is finished playing, controlling the first decoder to switch to the second decoder to play the start-up part of the data buffered in the second decoder;

Receiving the resume part data corresponding to the second type of video from the server and distributing it to the first decoder for buffering, the playback resolution of the resume part data is higher than the highest playback resolution supported by the second decoder ;

After the playback of the starting part of the data is completed, the second decoder is controlled to switch to the first decoder to play the continued part of the data buffered in the first decoder.

In a second aspect, a method for controlling video switching is provided, including:

In the process of playing the first type of video through the first decoder, the starting part of the data corresponding to the second type of video is received from the server and distributed to the second decoder for buffering. The playback resolution of the starting part of the data is not high The highest playback resolution supported by the second decoder;

After the first type of video is finished playing, controlling the first decoder to switch to the second decoder to play the start-up part of the data buffered in the second decoder;

Receiving the resume part data corresponding to the second type of video from the server and distributing it to the first decoder for buffering, the playback resolution of the resume part data is higher than the highest playback resolution supported by the second decoder ;

After the playback of the starting part of the data is completed, the second decoder is controlled to switch to the first decoder to play the continued part of the data buffered in the first decoder.

In a third aspect, a storage medium is provided, characterized in that a program for implementing a control method for video switching is stored, and when the program is run by a controller, the following steps are performed:

In the process of playing the first type of video through the first decoder, the starting part of the data corresponding to the second type of video is received from the server and distributed to the second decoder for buffering. The playback resolution of the starting part of the data is not high The highest playback resolution supported by the second decoder;

After the first type of video is finished playing, controlling the first decoder to switch to the second decoder to play the start-up part of the data buffered in the second decoder;

Receiving the resume part data corresponding to the second type of video from the server and distributing it to the first decoder for buffering, the playback resolution of the resume part data is higher than the highest playback resolution supported by the second decoder ;

After the playback of the starting part of the data is completed, the second decoder is controlled to switch to the first decoder to play the continued part of the data buffered in the first decoder.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present invention, the drawings required in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can obtain other drawings based on these drawings without paying any creative labor.

FIG. 1A exemplarily shows a schematic diagram of an operation scene between a display device and a control device;

FIG. 1B exemplarily shows a configuration block diagram of the control device 100 in FIG. 1A;

FIG. 1C exemplarily shows a configuration block diagram of the display device 200 in FIG. 1A;

FIG. 1D exemplarily shows a block diagram of the architecture configuration of the operating system in the memory of the display device 200;

FIG. 2 exemplarily shows a block diagram of another configuration of the display device 200;

FIG. 3 exemplarily shows a schematic flowchart of video switching performed by the display device.

detailed description

The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

FIG. 1A exemplarily shows a schematic diagram of an operation scene between a display device and a control device. As shown in FIG. 1A, the control apparatus 100 and the display device 200 may communicate in a wired or wireless manner.

The control device 100 is configured to control the display device 200, which can receive operation instructions input by the user and convert the operation instructions into instructions that the display device 200 can recognize and respond to, acting as an intermediary between the user and the display device 200 effect. For example, the user operates the channel addition and subtraction keys on the control device 100, and the display device 200 responds to the channel addition and subtraction operations.

The control device 100 may be a remote controller 100A, including infrared protocol communication or Bluetooth protocol communication, and other short-range communication methods, etc., to control the display device 200 through wireless or other wired methods. The user can control the display device 200 by inputting user instructions through keys on the remote control, voice input, and control panel input. For example, the user can control the display device 200 by inputting corresponding control commands through the volume up and down keys on the remote control, channel control keys, up / down / left / right movement keys, voice input keys, menu keys, power on / off keys, etc. Function.

The control device 100 may also be a smart device, such as a mobile terminal 100B, tablet computer, computer, notebook computer, or the like. For example, the display device 200 is controlled using an application program running on a smart device. The application can be configured to provide users with various controls on the screen associated with the smart device through an intuitive user interface (UI).

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

The display device 200 may provide a network receiving function of a broadcast receiving function and a computer supporting function. The display device may be implemented as a digital TV, an Internet TV, an Internet Protocol TV (IPTV), etc.

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

The display device 200 also performs data communication with the server 300 through various communication methods. Here, the display device 200 may be allowed to perform communication connection through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 300 can provide various contents and interactions to the display device 200. Illustratively, the display device 200 can send and receive information, for example: receive electronic program guide (EPG) data, receive software program updates, or access a remotely stored digital media library. The server 300 may be one group or multiple groups, and may be one or more types of servers. The server 300 provides other network service content such as video on demand and advertising services.

A configuration block diagram of the control device 100 is exemplarily shown in FIG. 1B. As shown in FIG. 1B, the control device 100 includes a controller 110, a memory 120, a communicator 130, a user input interface 140, an output interface 150, and a power supply 160.

The controller 110 includes a random access memory (RAM) 111, a read only memory (ROM) 112, a processor 113, a communication interface, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as communication cooperation between internal components, external and internal data processing functions.

Exemplarily, when it is detected that the user interacts with pressing a key arranged on the remote controller 100A or touches a touch panel arranged on the remote controller 100A, the controller 110 may control to generate a signal corresponding to the detected interaction, and This signal is sent to the display device 200.

The memory 120 is used to store various operating programs, data, and applications that drive and control the control device 100 under the control of the controller 110. The memory 120 can store various control signal instructions input by the user.

The communicator 130 realizes communication of control signals and data signals with the display device 200 under the control of the controller 110. For example, the control device 100 transmits a control signal (such as a touch signal or a button signal) to the display device 200 via the communicator 130, and the control device 100 can receive the signal transmitted by the display device 200 via the communicator 130. The communicator 130 may include an infrared signal interface 131 and a radio frequency signal interface 132. For example, when the infrared signal interface is used, the user input command needs to be converted into an infrared control signal according to the infrared control protocol, and then sent to the display device 200 via the infrared sending module. As another example: when the radio frequency signal interface, the user input command needs to be converted into a digital signal, and then modulated according to the radio frequency control signal modulation protocol, and then sent to the display device 200 by the radio frequency transmission terminal.

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

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

The power supply 160 is used to provide operating power support for each element of the control device 100 under the control of the controller 110. The form can be battery and related control circuit.

A block diagram of the hardware configuration of the display device 200 is exemplarily shown in FIG. 1C. As shown in FIG. 1C, the display device 200 may include a tuner 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a memory 260, a user interface 265, a video processor 270, a display 275, Audio processor 280, audio output interface 285, power supply 290.

Tuner demodulator 210, which receives broadcast TV signals by wire or wireless, can perform modulation, demodulation and other processing of amplification, mixing and resonance, and is used to demodulate the TV selected by the user from multiple wireless or cable broadcast TV signals The audio and video signals carried in the frequency of the channel, as well as additional information (such as EPG data).

Tuner demodulator 210 can respond to the frequency of the TV channel selected by the user and the TV signal carried by the frequency according to the user's selection and controlled by controller 250.

Tuner demodulator 210, according to the different broadcasting systems of TV signals, there are many ways to receive the signal, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting or Internet broadcasting, etc .; and depending on the type of modulation, digital modulation or analog Modulation method; and according to the type of TV signal received, analog and digital signals can be demodulated.

In some other exemplary embodiments, the tuning demodulator 210 may also be in an external device, such as an external set-top box. In this way, the set-top box outputs a TV signal after being modulated and demodulated, and is input into the display device 200 through the external device interface 240.

The communicator 220 is a component for communicating with an external device or an external server according to various types of communication protocols. For example, the display device 200 may transmit content data to an external device connected via the communicator 220, or browse and download content data from an external device connected via the communicator 220. The communicator 220 may include a network communication protocol module such as a WIFI module 221, a Bluetooth communication protocol module 222, a wired Ethernet communication protocol module 223, or a near field communication protocol module, so that the communicator 220 can receive Control signals, and implement the control signals as WIFI signals, Bluetooth signals, radio frequency signals, etc.

The detector 230 is a component used by the display device 200 to collect signals from the external environment or interact with the external environment. The detector 230 may include a sound collector 231, such as a microphone, which may be used to receive the user's voice, such as a voice signal of a user's control instruction to control the display device 200; or, it may collect environmental sounds used to identify the type of environmental scene to achieve display The device 200 can adapt to environmental noise.

In some other exemplary embodiments, the detector 230 may further include an image collector 232, such as a camera, a camera, etc., which may be used to collect external environment scenes to adaptively change the display parameters of the display device 200; The user's attributes or interactive gestures with the user to achieve the interactive function between the display device and the user.

In some other exemplary embodiments, the detector 230 may further include a light receiver for collecting ambient light intensity to adapt to changes in display parameters of the display device 200 and the like.

In some other exemplary embodiments, the detector 230 may further include a temperature sensor. For example, by sensing the ambient temperature, the display device 200 may adaptively adjust the display color temperature of the image. Exemplarily, when the temperature is relatively high, the display device 200 may be adjusted to display a cold color tone of the image temperature; when the temperature is relatively low, the display device 200 may be adjusted to display a warm color tone of the image color temperature.

The external device interface 240 is a component that provides the controller 250 to control the data transmission between the display device 200 and the external device. The external device interface 240 can be connected to external devices such as set-top boxes, game devices, notebook computers, etc. in a wired / wireless manner, and can receive external devices such as video signals (such as moving images), audio signals (such as music), and additional information (such as EPG) ) And other data.

The external device interface 240 may include: a high-definition multimedia interface (HDMI) terminal 241, a composite video blanking synchronization (CVBS) terminal 242, an analog or digital component terminal 243, a universal serial bus (USB) terminal 244, and a component Any one or more of terminals (not shown in the figure), red, green and blue (RGB) terminals (not shown in the figure) and the like.

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

As shown in FIG. 1C, the controller 250 includes a random access memory (RAM) 251, a read only memory (ROM) 252, a graphics processor 253, a CPU processor 254, a communication interface 255, and a communication bus 256. Among them, the RAM 251, ROM 252, graphics processor 253, and CPU processor 254 communication interface 255 are connected through a communication bus 256.

ROM252 is used to store various system startup instructions. For example, when the power-on signal is received, the power of the display device 200 starts to start, the CPU processor 254 runs the system start instruction in the ROM 252, and copies the operating system stored in the memory 260 to the RAM 251 to start the start operating system. After the startup of the operating system is completed, the CPU processor 254 copies the various application programs in the memory 260 to the RAM 251, and then starts to run and start the various application programs.

The graphics processor 253 is used to generate various graphics objects, such as icons, operation menus, and user input instructions to display graphics. The graphics processor 253 may include an operator for performing operations by receiving various interactive instructions input by the user, and then display various objects according to display attributes; and a renderer for generating various objects obtained based on the operator, which will be performed The rendered result is displayed on the display 275.

The CPU processor 254 is used to execute operating system and application program instructions stored in the memory 260. And according to the received user input instructions, to perform various applications, data and content processing, so as to finally display and play various audio and video content.

In some exemplary embodiments, the CPU processor 254 may include multiple processors. The multiple processors may include a main processor and multiple or one sub-processors. The main processor is used to perform some initialization operations of the display device 200 in the pre-loading mode of the display device, and / or display screen operations in the normal mode. Multiple or one sub-processors are used to perform an operation in the standby mode of the display device.

The communication interface 255 may include a first interface to an n-th interface. These interfaces may be network interfaces connected to external devices via a network.

The controller 250 may control the overall operation of the display device 200. For example, in response to receiving a user input command for selecting a GUI object displayed on the display 275, the controller 250 may perform an operation related to the object selected by the user input command.

Among them, the object may be any one of selectable objects, such as a hyperlink or an icon. The operation related to the selected object, for example, the operation of connecting to a hyperlinked page, document, image, etc., or the operation of executing a program corresponding to the object. The user input command for selecting a GUI object may be a command input through various input devices (eg, mouse, keyboard, touch pad, etc.) connected to the display device 200 or a voice command corresponding to a voice spoken by the user.

The memory 260 is used to store various types of data, software programs, or application programs that drive and control the operation of the display device 200. The memory 260 may include volatile and / or non-volatile memory. The term "memory" includes the memory 260, the RAM 251 and the ROM 252 of the controller 250, or the memory card in the display device 200.

In some embodiments, the memory 260 is specifically used to store operating programs that drive the controller 250 in the display device 200; store various application programs built in the display device 200 and downloaded by users from external devices; and store for configuration provided by the display 275 Data of various GUIs, various objects related to the GUI, and visual effects images of selectors for selecting GUI objects.

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

In some embodiments, the memory 260 specifically stores software and / or programs for representing an operating system (OS), and these software and / or programs may include, for example, a kernel, middleware, application programming interface (API), and / or application. Exemplarily, the kernel can control or manage system resources, and functions implemented by other programs (such as the middleware, API, or application program); meanwhile, the kernel can provide an interface to allow middleware, API, or application program access control To control or manage system resources.

FIG. 1D exemplarily shows a block diagram of the architecture configuration of the operating system in the memory of the display device 200. The operating system architecture from top to bottom is the application layer, middleware layer and kernel layer.

The application layer, application programs built in the system, and non-system-level application programs belong to the application layer. Responsible for direct interaction with users. The application layer may include multiple applications, such as a setting application, an e-post application, and a media center application. These applications can be implemented as Web applications, which are executed based on the WebKit engine, and specifically can be developed and executed based on HTML5, Cascading Style Sheets (CSS), and JavaScript.

Here, HTML, which is called HyperText Markup Language (HyperText Markup Language), is a standard markup language for creating web pages. The web pages are described by markup tags. HTML tags are used to describe text, graphics, animation, sound, tables, Links, etc., the browser will read the HTML document, explain the content of the tags in the document, and display it in the form of a web page.

CSS, which is called Cascading Style Sheets, is a computer language used to express the style of HTML files. It can be used to define the style structure, such as fonts, colors, and positions. CSS styles can be stored directly with HTML web pages or separate style files to control the styles in web pages.

JavaScript is a language used in the programming of Web pages. It can be inserted into HTML pages and interpreted by the browser. The interaction logic of the Web application is implemented through JavaScript. JavaScript can encapsulate the JavaScript extension interface through the browser to achieve communication with the kernel layer,

The middleware layer can provide some standardized interfaces to support the operation of various environments and systems. For example, the middleware layer can be implemented as a multimedia and hypermedia information coding expert group (MHEG) for middleware related to data broadcasting, as well as DLNA middleware for middleware related to external device communication, and can also be implemented as providing Middleware that displays the browser environment in which each application in the device runs.

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

The kernel layer also provides communication between system software and hardware, and provides device driver services for various hardware, such as: display driver for display, camera driver for camera, key driver for remote control, and WIFI module Provide WiFi drivers, audio drivers for audio output interfaces, and power management drivers for power management (PM) modules.

The user interface 265 receives various user interactions. Specifically, it is used to send the user's input signal to the controller 250, or to transmit the output signal from the controller 250 to the user. Exemplarily, the remote controller 100A may send input signals such as a power switch signal, a channel selection signal, a volume adjustment signal, etc. input by the user to the user interface 265, and then the user interface 265 forwards the signal to the controller 250; The output signal such as audio, video or data output from the user interface 265 processed by the controller 250 is received, and the received output signal is displayed or output as an audio or vibration form.

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

Alternatively, the user can input a user command by inputting a specific sound or gesture, and the user interface 265 recognizes the sound or gesture through the sensor to receive the user input command.

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

For example, the video processor 270 includes a demultiplexing module, a video decoding module (decoder), an image synthesis module, a frame rate conversion module, a display formatting module, and so on.

Wherein the demultiplexing module is used to input audio and video data stream demultiplexing processing, such as MPEG-2 input stream (based on the digital storage medium the moving image and voice compression standard), the demultiplexing module which de Multiplexed into video signals and audio signals.

The video decoding module is used to process the demultiplexed video signal, including decoding, scaling, and buffer processing. Here, the number of video decoding modules may be one or more.

An image synthesis module, such as an image synthesizer, is used to superimpose and mix the GUI signal generated by the graphics generator according to user input or generated by itself with the zoomed video image to generate an image signal for display.

The frame rate conversion module is used to convert the frame rate of the input video, such as converting the frame rate of the input 60 Hz video to a frame rate of 120 Hz or 240 Hz. The usual format is implemented by inserting frames, for example.

The display formatting module is used to change the signal output by the frame rate conversion module into a signal conforming to the display format of the display, for example, format-converting the signal output by the frame rate conversion module to output RGB data signals.

The display 275 is used to receive the image signal input from the video processor 270 and display the video content, image, and menu control interface. The displayed video content may come from the video content in the broadcast signal received by the tuner demodulator 210, or from the video content input from the communicator 220 or the external device interface 240. The display 275 also displays a user control interface UI generated in the display device 200 and used to control the display device 200.

And, the display 275 may include a display screen component for presenting a picture and a driving component that drives image display. Alternatively, if the display 275 is a projection display, it may further include a projection device and a projection screen.

The audio processor 280 is used to receive external audio signals, perform decompression and decoding, and perform audio data processing such as noise reduction, digital-to-analog conversion, and amplification processing according to the standard codec protocol of the input signal, which can be obtained in the speaker 286 Play audio signal.

Exemplarily, the audio processor 280 may support various audio formats. For example, MPEG-2, MPEG-4, Advanced Audio Coding (AAC), High Efficiency AAC (HE-AAC) and other formats.

The audio output interface 285 is used to receive the audio signal output by the audio processor 280 under the control of the controller 250. The audio output interface 285 may include a speaker 286, or an external audio output terminal 287 output to a generator of an external device, such as a headset Output terminal.

In some other exemplary embodiments, the video processor 270 may include one or more chips. The audio processor 280 may also include one or more chips.

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

The power supply 290 is used to provide power supply support for the display device 200 under the control of the controller 250 to input power from an external power supply. The power supply 290 may be a built-in power supply circuit installed inside the display device 200 or a power supply installed outside the display device 200.

On the basis of the foregoing FIGS. 1A and 1C, continue to refer to FIG. 2, wherein the video processor 270 in the display device includes at least a Main decoder 271 and a Sub decoder 272.

In some embodiments of the present application, the controller 250 receives video data from the server 300, and creates corresponding types of resources for the Main decoder 271 and Sub decoder 272, respectively, for corresponding processing of the video data, These resources include at least a media playback background, a protocol analysis terminal, a player, etc., which will be described in detail in subsequent embodiments, and will not be repeated here.

The Main decoder 271, for example, supports playback resolutions up to 2160P.

Sub-channel decoder 272, for example, supports playback resolutions up to 1080P.

As users' demands for video definition become higher and higher, the performance of display devices is also required to increase. This high performance brings more resource occupancy, mainly reflected in the memory occupancy of the display device and the chip bandwidth. For high-resolution and high-bitrate video, the resource occupancy is even greater. Since the decoder is hardware, the memory occupied by the decoder during operation must be static memory allocated at the compilation stage, which is a fixed address segment, that is, the memory limit of the decoder is very strict.

For example, in some scenarios, the memory allocation principles adopted by the display device for the decoder are as follows:

For decoders that support 1080p video, at least 50M of memory must be allocated;

For decoders that support 2160p video, at least 100M of memory must be allocated

Based on the above principles, if you want to achieve fast video switching between two 2160p videos, you need to allocate 200M of memory for the two decoders during compilation, which is not acceptable in actual operation.

For high-end display devices such as smart TVs, supporting 4K resolution (that is, 2106p) is almost a rigid requirement. Therefore, one of the two decoders must support 2106p, and the video data of most advertisements is only up to 1080p, so the large Some hardware manufacturers choose to use the 2106P + 1080p decoder combination to support the advertisement insertion scene: that is, the first film is decoded by the first decoder (also known as the main (main) decoder), and the highest support is 2106p; the second decoder (also known as the decoder) is also used for advertising Sub (Sub) decoder] decoding, up to 1080p.

In addition, most hardware manufacturers' mid-to-low-end chip bandwidth can only support one channel 2106p plus one channel 1080p, so the decoder combination of 2106p + 1080p is the best solution to meet the requirements. It takes up a total of 150M of memory and can support most scenarios .

However, the above decoder combination scheme has the following defects:

Since there are only two decoders, when multiple advertisements need to be inserted during the playback of the main movie, the Main decoder and Sub decoder need to be used to play the main movie and each advertisement in turn. When the number of advertisements to be inserted is even, the last advertisement will occupy the Main decoder to decode. At this time, if you need to switch back to the main film for playback, you can only perform the preprocessing of the relevant data in the Sub decoder. The playback resolution of the positive film will be limited to 1080p, thus affecting the playback of the positive film.

For example, suppose that the highest playback resolution of the positive film is 2106p, the highest playback resolution of the two advertisements that need to be inserted are both 1080p, and switch back to the positive film after the second advertisement ends. Then, the display device specifically needs to perform the following operations:

1. Main decoder is used to decode and play the positive film.

2. In the process of playing the positive film, when receiving the play instruction of Advertisement 1, the Sub-channel decoder is used to create and initialize the relevant resources of Advertisement 1, and decode the relevant data of Advertisement 1.

3. At the designated playback time of advertisement 1, pause the playback of the positive film, start playing advertisement 1 through the Sub decoder, and at the same time, release the relevant resources of the Main decoder.

4. During the playback of Advertisement 1, the Main decoder is used to create and initialize the relevant resources of Advertisement 2 and decode the relevant data of Cache Advertisement 2.

5. After the advertisement 1 is played, the advertisement of the main channel 2 is started to be played, and at the same time, the related resources of the sub-channel decoder are released.

6. During the playback of Advertisement 2, I received the instruction to switch back to the main movie, and the Main decoder is being occupied by Advertisement 2. In order to achieve a resolution of 2106p during the playback of the main movie, the display device can only sacrifice switching Performance, that is, after the advertisement 2 is played, the relevant resources of the Main decoder are released, re-initialized, and then the Main decoder is used to decode and play the positive film. In this way, a black screen waiting process of 1 to 2 seconds will occur at the end of the advertisement playback.

In actual use, the number of advertisements is completely random, so as long as the highest playback score of the main film

If the resolution is greater than 1080p, the display device will have a 50% probability of the above black screen waiting process, that is, the rapid switching failure, which seriously affects the timeliness of video switching, and seriously reduces the user experience, unable to meet market needs.

It should be noted that streaming media has three major protocols, Dynamic Adaptive Streaming Protocol (Dynamic Adaptive Streaming over HTTP, DASH), Apple-based HTTP-based streaming media communication protocol (Apple HTTP Live Streaming, HLS), Microsoft Corporation The realized streaming media solution (Microsoft Smoothing, MSS), its main feature is to adaptively switch the video playback resolution according to the network conditions.

Based on this, it is considered in this application that within the first few seconds of video playback, due to the low video data cached by the display device and network fluctuations at this time, the display device will not directly use the maximum playback resolution supported in most cases The rate starts to play, but first use a lower playback resolution for a period of video playback, and then switch to a higher playback resolution in the middle. In the experiment, the occurrence probability of this situation is greater than 90%. Therefore, in the embodiments of the present application, according to the above characteristics embodied in the video playback process, the display device may divide the playback process of the main video (that is, the positive film) into two stages: The start-up phase with a lower playback resolution and the resume phase with a higher playback resolution.

Therefore, in the embodiment of the present application, when a multimedia presentation information (for example, an advertisement) occupies the Main decoder to play, the display device may first use the Sub decoder to play the low-resolution starting part of the main video data After the multimedia display information is played, switch to the main channel decoder to play the high playback resolution of the main video. In this way, the main video can be played in high playback resolution all the time.

Referring to FIG. 3, in the embodiment of the present application, the detailed process of video switching by the display device is as follows:

Step 310: During the process of playing the multimedia presentation information through the Main decoder, the display device determines that the main video needs to be played.

For example, when inserting multimedia presentation information in the main video, since the playing time of the multimedia presentation information is known, the server may notify the display device in advance and start preparing to continue playing the main video.

Step 320: The display device receives the start-up part data corresponding to the main video from the server and distributes it to the Sub-channel decoder for buffering. The playback resolution of the start-up part data is not higher than the highest playback supported by the Sub-channel decoder Resolution.

Specifically, in the streaming media protocol, the video data will be divided into a number of small segments, which are recorded as segments. Each segment generally contains 1 to 2 seconds of video data. The playback resolution and bit rate of the same segment are completely Similarly, these parameters can be passed to the display device through the segment header.

The server or display device can decide which playback resolution video data to send or request to download based on the current network comprehensive status (eg, network speed, bandwidth, data cache amount, etc.), and the display device can be based on the received The data packet header of the video data, and the parameters such as the playback resolution of the currently received segment.

Therefore, in the embodiment of the present application, the display device may request the server to deliver video data with a lower playback resolution according to the current network comprehensive status, that is, start-up part of the data.

Correspondingly, when the display device sends the received start-up part data to the Sub-channel decoder for buffering, the Sub-channel decoder can be initialized in advance, and the analysis and decoding operations of the start-up part data are completed in advance to prepare for subsequent playback In some embodiments of the present application, the playback resolution of the starting part of the data is 1080P.

Step 330: After the multimedia display information is played, the display device switches from the Main decoder to the Sub decoder to play back the start-up portion of data buffered in the Sub decoder.

Specifically, after the display device plays the multimedia display information cached in the Main decoder, it will quickly switch to the Sub decoder. At this time, the data of the starting part cached on the Sub decoder has been parsed and decoded. Play directly.

Further, after the multimedia presentation information is played, the display device will release various resources on the Main decoder and initialize the Main decoder. After receiving the resume data sent by the server, Then you can directly perform operations such as parsing and decoding to prepare for subsequent playback.

Step 340: The display device receives the resume data corresponding to the main video from the server and distributes it to the Main decoder for buffering. The playback resolution of the resume data is higher than the highest supported by the Sub decoder. Play resolution.

Similarly, in the embodiment of the present application, the display device may request the server to deliver video data with a higher playback resolution according to the current network comprehensive status, that is, start-up part of the data.

In some embodiments of the present application, the playback resolution of the resumed partial data is 2106P.

Since the segment header of each segment can carry the playback resolution of the segment, when the display device determines that the video data corresponding to the received segment has a playback resolution higher than 1080p (ie, resumes part of the data), it will start from this segment Initially, all subsequent received segments are directly injected into the Main decoder.

Since the first frame of data contained in each segment must be the key frame of the video (that is, I frame), as long as the video is cut according to the segment, the cut-off start data and continued playback data can be played separately.

Further, when the display device recognizes that the part of the resume data received from the server is recognized, that is, when the playback resolution of the subsequent arrival segment changes and exceeds 1080p, the first segment of the data of the resume broadcast will be saved Time stamp, marked as T1.

In actual applications, the server will continuously send video data to the display device. Therefore, step 320 usually occurs during the display device playing the multimedia presentation information cached in the Main decoder, while step 340 usually occurs when the display device plays the Sub channel In the process of starting part of the data buffered in the decoder.

Step 350: The display device switches from the Sub-channel decoder to the Main-channel decoder after the playback of the starting part of the data is completed, and plays the continued-play-part data buffered in the Main-channel decoder.

Specifically, when the display device plays the starting portion of the data buffered in the Sub channel decoder and reaches the recorded timestamp, that is, when it reaches the position of T1, the Sub channel decoder is suspended, the Main channel decoder is started, and playback starts from T1 The resumed part of the data buffered in the Main decoder, so that the resumed part of the data with high playback resolution can be played in the Main decoder.

Further, the display device will release various resources on the Sub decoder, and initialize the Sub decoder to prepare for subsequent playback of other video data.

In the embodiment of the present application, since the playback duration of the multimedia presentation information is not fixed, and the playback duration of the start-up part of the data is also not fixed, the display device may receive the multimedia presentation information buffered in the Main decoder during the process. To continue to broadcast some data, at this time, because the various resources on the Main decoder have not been released, the display device needs to wait for the multimedia display information to be played, release the various resources on the Main decoder, and then The Main decoder is initialized, and further, the received resume data is distributed to the Main decoder for buffering. On the other hand, the display device may also receive the resume part of the data during the playback of the start part of the buffered data in the Sub decoder. At this time, because the multimedia presentation information cached in the Main decoder has been played, Then, various resources on the Main decoder have been released and initialized. Therefore, the display device can directly distribute the received part of the resume data to the Main decoder for buffering.

When the display device is playing video data, regardless of whether two decoders are used, the playback screen will cause obvious visual changes when switching the playback resolution, and the use of two decoders will make the screen switch quickly without a black screen. Therefore, adopt When the above technical solution is used to play the main video (that is, the main film), compared with the technical solution that does not distinguish between the starting part data and the continuing part data, the subjective experience is basically the same, which can ensure the playback effect.

The above embodiment will be further described in detail in conjunction with a specific application scenario.

In the following embodiments, it is assumed that the content to be played by the display device is: positive film, advertisement 1, advertisement 2.

When the display device plays the positive film, the various resources occupied include the main media playback background, which is denoted as media_backend_main, the main protocol resolution end, denoted as protocol_stack_main, the main player, denoted as player_main, the main decoder, and denoted as decoder_main.

At this time, the server instructs Advertisement 1 to be inserted at Tad1 at a later time, and the display device starts to create and initialize various related resources, including: Advertisement 1 media playback background, denoted as media_backend_ad1, Advertisement 1 protocol parsing end, denoted as protocol_stack_ad1 1. Advertisement 1 player, denoted as player_ad1, and auxiliary decoder, denoted as decoder_sub. Except for decoder_sub, all other resources are logic modules created by the controller. Each of the above logic modules can create multiple instances without affecting each other.

The display device passes the Uniform Resource Locator (URL) of Advertisement 1 to media_backend_ad1 to protocol_stack_ad1, and protocol_stack_ad1 downloads and parses the media presentation content description (MPD) file at the specified URL to obtain the initial information of Advertisement 1 , Including Codec, duration, code rate, frame rate, initial resolution, audio sampling rate, etc., then pass to player_ad1 and initialize decoder_sub, then download the video data of advertisement 1 to decoder_sub for decoding, and cache the decoded video data.

When the positive film is played to Tad1, the display device issues a pause command to suspend the operation of all logic modules on the Main decoder, including: stopping player_main playback, and switching the video output device (Vout) and sound output device (Aout) to Advertisement 1, and the start command is issued to start the playback of player_ad1. Since the video data of Advertisement 1 has been downloaded and decoded in advance, the phenomenon that the user can watch is as follows: the positive film seamlessly switches to Advertisement 1 at Tad1 moment.

At this time, the display device will actively release various resources related to the positive film, including media_backend_main, protocol_stack_main, player_main, and decoder_main.

After the display device plays advertisement 1 through player_ad1 for a period of time, the server indicates that advertisement 2 will be inserted after advertisement 1 is played. At this time, the display device creates and initializes various related resources, including: advertising 2 media playback background, denoted as media_backend_ad2, advertising 2 protocol parsing end, denoted as protocol_stack_ad2, advertising 2 player, denoted as player_ad2, and main decoder, Recording decoder_main, except for decoder_main, all other resources are logic modules created by the controller, which will not be repeated here.

The process is the same as that of Advertisement 1. In the process of Advertisement 1, the display device pre-downloads, decodes, and caches the video data of Advertisement 2, and immediately switches to player_ad2 after Advertisement 1 finishes, starts to play Advertisement 2, and releases the advertisement. 1 All kinds of related resources, including media_backend_ad1, protocol_stack_ad1, player_ad1 and decoder_sub.

After the display device plays Advertisement 2 through player_ad2 for a period of time, the server indicates that the main film will be inserted after the advertisement 2 is played. At this time, the display device creates and initializes various types of related resources, including the new media playback background, denoted as media_backend_main_resume, the new protocol parser, denoted as protocol_stack_main_resume, the new player, denoted as player_main_resume, auxiliary decoder, and denoted as decoder_sub.

The display device passes the URL of the positive film to protocol_stack_main_resume through media_backend_main_resume, protocol_stack_main_resume downloads the corresponding MPD file under the URL, and parses out the maximum playback resolution of the video data. If the maximum playback resolution of the video data is less than or equal to the maximum playback resolution supported by the decoder_sub ( 1080p), decoder_sub can support the playback of positive films, and the subsequent process does not need to switch between decoder_sub and decoder_main; conversely, if the maximum playback resolution of video data is greater than the maximum playback resolution (1080p) supported by decoder_sub, you need to use The technical solutions proposed in the embodiments of the present application will be introduced in the following steps.

The display device negotiates with the server, by judging factors such as network speed, bandwidth, and amount of cached data at the current time, combined with the algorithm of the streaming media protocol, it is concluded that the playback resolution of the video data of the positive film to be downloaded is less than or equal to 1080p. Further, it can also Confirm the information such as the code rate and frame rate of the video data.

The display device downloads the video data after the time of Tad1 from the server. This part of the video data is the starting part of the data, and its playback resolution is less than or equal to 1080p. The display device allocates the starting part of the data to decoder_sub for decoding and buffering, as long as it is not subsequently received When the video data with a resolution above 1080p is played, the video data received subsequently is always decoded using decoder_sub.

After the advertisement 2 is played, the display device switches the video output device and the sound output device to the positive film. Since the system state (network speed, etc.) does not support the playback of video data greater than 1080p at this time, use decoder_sub to decode first. Broadcast some data.

The display device negotiates with the server. By judging factors such as network speed, bandwidth, and the amount of cached data at the current time, combined with the algorithm of the streaming media protocol, it is concluded that the playback resolution of the video data of the positive film that needs to be downloaded is greater than 1080p. Further, it can also Confirm the information such as the code rate and frame rate of the video data.

Then, the display device will record the start time of the positive film that continues to download, that is, the position of the display timestamp (Presentation Time Stamp), used to measure when the decoded video data is displayed, recorded as T2K4K, created and initialized All kinds of resources related to the new positive film, including the new new media playback background, referred to as media_backend_main_resume_2K4K, the new and new protocol parser, referred to as protocol_stack_main_resume_2K4K, the new new player, referred to as player_main_resume_2K4K, the main decoder, decoder_main.

The display device will continue to download the video data of the positive film after the T2K4K moment. This part of the video data is the resume data. The display device will distribute the resume video data to the decoder_main for decoding and caching.

When the display device plays the main film to the time of T2K4K through player_main_resume, it will pause the playback of player_main_resume and switch to player_main_resume_2K4K. At this time, the resumed part of the data has been downloaded, parsed, and decoded in decoder_main. The playback resolution of all the video data is above 1080p, then the display device will distribute all the downloaded video data to decoder_main to decode and cache, and no longer switch the decoder.

In the embodiment of the present application, the display device downloads the starting part data and the resuming part data of the main video from the server respectively according to the low playback resolution and the high playback resolution. When the Main decoder is occupied by the multimedia display information, it first passes the Sub The channel decoder plays the starting part of the data, and after the multimedia display information is played, it switches to the Main channel decoder to play the continued part of the data, so that the main video and multimedia display information can be seamlessly switched to save memory as much as possible. Under the premise of, the defect of the dual-channel decoder cannot be switched back to the main video with high playback resolution normally when inserting even-numbered multimedia display information in the main video, which effectively improves the timeliness of streaming video switching. The system guarantees the streaming video playback performance of the system and improves the user experience.

Based on the above embodiment, referring to FIG. 2, a display device includes at least a controller 250, a Main decoder 271, and a Sub decoder 272, where,

The controller 250 is used to perform the following operations:

In the process of playing the multimedia presentation information through the Main decoder 271, the starting part data corresponding to the main video is received from the server and distributed to the Sub decoder 272 for buffering. The playback resolution of the starting part data is not higher than The highest playback resolution supported by the Sub decoder 272;

After the multimedia presentation information is played, the Main decoder 271 is switched to the Sub decoder 272, and the start-up part of the data buffered in the Sub decoder 272 is played;

Receive the resume part data corresponding to the main video from the server and distribute it to the Main decoder 271 for buffering. The playback resolution of the resume part data is higher than the highest playback resolution supported by the Sub decoder 272 ;

After the playback of the start-up part data is completed, the Sub-channel decoder 272 is switched to the Main-channel decoder 271, and the continued-play-part data buffered in the Main-channel decoder 271 is played.

In some embodiments of the present application, before receiving the start part data corresponding to the main video from the server, the controller 250 is further used to:

Determine the current comprehensive state of the first network, and request the server to deliver a master video with a resolution that meets the comprehensive state of the first network;

Before receiving the resume part data corresponding to the main video from the server, the controller 250 is further used to:

Determine the current integrated state of the second network, and request the server to deliver a master video with a resolution that meets the integrated state of the second network.

In some embodiments of the present application, when allocating the start-up part of the data to the Sub decoder 272 for buffering, the controller 250 is used to:

Send the starting part of the data to the Sub decoder 272;

Analyze and decode the starting part of the data through the Sub decoder 272;

The display device distributes part of the resumed data to the Main decoder 271 for buffering, including:

Sending the resumed part of the data to the Main decoder 271;

The Main decoder 271 analyzes and decodes the resumed part of the data.

In some embodiments of the present application, when receiving the resume data corresponding to the main video from the server and distributing it to the Main decoder 271 for buffering, the controller 250 is used to:

If during the playback of the multimedia presentation information through the Main decoder 271, part of the resumed data is received, after waiting for the multimedia presentation information to finish playing, various resources on the Main decoder 271 are released to decode the Main presentation The device 271 initializes, and then distributes part of the received resume data to the Main decoder 271 for buffering;

If the resume part data is received during the playback of the starting part data through the Sub decoder 272, the received resume part data is directly distributed to the Main decoder 271 for buffering.

In some embodiments of the present application, when receiving the resume data corresponding to the main video from the server and distributing it to the Main decoder 271 for buffering, the controller 250 is used to:

Record the start time of the first segment in the resumed part of the data;

After the playback of the starting part of the data is completed, the Sub-channel decoder 272 is switched to the Main-channel decoder 271, and when the continued-play part of the data buffered in the Main-channel decoder 271 is played, the The controller 250 is used to:

During the playback of the start-up part data buffered in the Sub-channel decoder through the Sub-channel decoder, when the starting time is reached, it is determined that the playback of the start-up part of the data is completed, and decoding is performed from the Sub-channel The device switches to the Main decoder, and continues to play the part of the resumed data buffered in the Main decoder.

Based on the same inventive concept, embodiments of the present application provide a storage medium for video switching, which stores a program for implementing a control method for streaming media video switching. When the program is run by a controller, the following steps are performed:

During the process of playing the multimedia presentation information through the Main decoder, the starting part data corresponding to the main video is received from the server and distributed to the Sub decoder for buffering. The playback resolution of the starting part data is not higher than the The highest playback resolution supported by Sub decoder;

After the multimedia display information is played, the Main decoder decodes to all

The Sub-channel decoder, playing the starting part of the data buffered in the Sub-channel decoder;

The display device receives the resume data corresponding to the main video from the server and distributes it to the Main decoder for buffering. The playback resolution of the resume data is higher than the highest playback resolution supported by the Sub decoder ;

After the playback of the start-up part data is completed, the Sub-channel decoder is switched to the Main-channel decoder, and the continued-play part of the data buffered in the Main-channel decoder is played.

In the embodiment of the present application, the display device selects the service according to the low playback resolution and the high playback resolution.

The device downloads the starting part data and the resuming part data of the main video separately. When the Main channel decoder is occupied by the multimedia display information, the starting part data is played through the Sub channel decoder first, and then switched after the multimedia display information is completed. To the Main decoder to play the continued broadcast part of the data, so that the main video and multimedia display information can be seamlessly switched, under the premise of saving memory, the maximum probability of eliminating even number of multimedia display information inserted in the main video At this time, the defect that the dual main + sub decoder cannot switch back to the main video with high playback resolution can effectively improve the timeliness of the streaming video switching, ensure the streaming video playback performance of the system, and improve the user experience.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

This application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the application. It should be understood that each flow and / or block in the flowchart and / or block diagram and a combination of the flow and / or block in the flowchart and / or block diagram may be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, special-purpose computer, embedded processing machine, or controller of other programmable data processing equipment to generate a machine that enables the generation of instructions executed by the computer or other programmable data processing equipment's controller An apparatus for realizing the functions specified in one block or multiple blocks of one flow or multiple flows of a flowchart and / or one block or multiple blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions The device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and / or block diagrams.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, which is executed on the computer or other programmable device The instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and / or block diagrams.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (11)

1. A display device is characterized by comprising:

   Display, used to display video playback screen;

   The first decoder and the second decoder are used for processing the video including at least the decoding operation;

   And a controller in communication with the display, the first decoder, and the second decoder, for executing:

   In the process of playing the first type of video through the first decoder, the starting part of the data corresponding to the second type of video is received from the server and distributed to the second decoder for buffering. The playback resolution of the starting part of the data is not high The highest playback resolution supported by the second decoder;

   After the first type of video is finished playing, controlling the first decoder to switch to the second decoder to play the start-up part of the data buffered in the second decoder;

   Receiving the resume part data corresponding to the second type of video from the server and distributing it to the first decoder for buffering, the playback resolution of the resume part data is higher than the highest playback resolution supported by the second decoder ;

   After the playback of the starting part of the data is completed, the second decoder is controlled to switch to the first decoder to play the continued part of the data buffered in the first decoder.
2. The display device according to claim 1, wherein before receiving the start part data corresponding to the second type of video from the server, the controller is further configured to:

   Determine the current comprehensive status of the first network, and request the server to deliver a second type of video whose resolution meets the comprehensive status of the first network;

   Before receiving the resume data corresponding to the second type of video from the server, the controller is further used to:

   Determine the current comprehensive state of the second network, and request the server to deliver and play the second type of video whose resolution meets the comprehensive state of the second network.
3. The display device according to claim 1, wherein the controller is configured to: when allocating the start-up portion of data to the second decoder for buffering:

   Sending the starting part of the data to the second decoder;

   Analyzing and decoding the start-up part data through the second decoder;

   When allocating part of the resumed data to the first decoder for buffering, the controller is used to:

   Sending the resumed part of the data to the first decoder;

   The first decoder performs parsing and decoding operations on the resumed part of the data.
4. The display device according to claim 1, 2 or 3, wherein the controller is used to receive the resume data corresponding to the second type of video from the server and distribute it to the first decoder for buffering :

   If, during the playback of the first type of video through the first decoder, the partial resume data is received, after waiting for the first type of video to finish playing, the various resources on the first decoder are released to decode the first video The device initializes, and then distributes the part of the received resume data to the first decoder for buffering;

   If the resume part data is received during the playback of the start-up part data through the second decoder, the received resume part data is directly allocated to the first decoder for buffering.
5. The display device according to claim 4, wherein when receiving the resume part data corresponding to the second type of video from the server and distributing it to the first decoder for buffering, the controller is used to:

   Record the start time of the first segment in the resumed part of the data;

   After the playback of the start-up part data is completed, the second decoder is controlled to switch to the first decoder, and when playing the resumed part data buffered in the first decoder, the controller is used :

   In the process of playing the start-up part data buffered in the second decoder through the second decoder, when the starting time is reached, it is determined that the start-up part data is finished playing, and the second decoding The decoder switches to the first decoder, and continues to play the resumed part of the data buffered in the first decoder.
6. A control method for video switching in a display device is characterized in that it includes:

   In the process of playing the first type of video through the first decoder, the starting part of the data corresponding to the second type of video is received from the server and distributed to the second decoder for buffering. The playback resolution of the starting part of the data is not high The highest playback resolution supported by the second decoder;

   After the first type of video is finished playing, controlling the first decoder to switch to the second decoder to play the start-up part of the data buffered in the second decoder;

   Receiving the resume part data corresponding to the second type of video from the server and distributing it to the first decoder for buffering, the playback resolution of the resume part data is higher than the highest playback resolution supported by the second decoder ;

   After the playback of the starting part of the data is completed, the second decoder is controlled to switch to the first decoder to play the continued part of the data buffered in the first decoder.
7. The method according to claim 6, wherein before receiving the start part data corresponding to the second type of video from the server, the method further comprises:

   Determining the current comprehensive state of the first network, and requesting the server to deliver a second type of video with a resolution consistent with the comprehensive state of the first network;

   Before receiving the resume data corresponding to the second type of video from the server, the method further includes:

   Determine the current comprehensive state of the second network, and request the server to deliver and play the second type of video whose resolution meets the comprehensive state of the second network.
8. The method according to claim 6, wherein allocating the start-up part data to the second decoder for buffering includes:

   Sending the starting part of the data to the second decoder;

   Analyzing and decoding the start-up part data through the second decoder;

   Distributing part of the resumed data to the first decoder for buffering includes:

   Sending the resumed part of the data to the first decoder;

   The first decoder performs parsing and decoding operations on the resumed part of the data.
9. The method according to claim 6, 7 or 8, wherein receiving data of the resume part corresponding to the second type of video from the server and distributing it to the first decoder for buffering includes:

   If in the process of playing the first type of video through the first decoder, part of the resume data is received, after waiting for the first type of video to finish playing, the various resources on the first decoder are released and the first Initialization, and then distribute the received part of the resume data to the first decoder for buffering;

   If the resume part data is received during the playback of the start-up part data through the second decoder, the received resume part data is directly allocated to the first decoder for buffering.
10. The method according to claim 9, wherein receiving the resume data corresponding to the second type of video from the server and distributing it to the first decoder for buffering further comprises:

    Record the start time of the first segment in the resumed part of the data;

    After the playback of the starting part of the data is completed, controlling the second decoder to switch to the first decoder to play the continued part of the data buffered in the first decoder includes:

    In the process of playing the start-up part data buffered in the second decoder through the second decoder, when the starting time is reached, it is determined that the start-up part data is finished playing, and the second The decoder switches to the first decoder, and continues to play the resumed part of the data buffered in the first decoder.
11. A storage medium is characterized by storing a program for implementing a control method for video switching. When the program is run by a controller, the following steps are performed:

    In the process of playing the first type of video through the first decoder, the starting part of the data corresponding to the second type of video is received from the server and distributed to the second decoder for buffering. The playback resolution of the starting part of the data is not high The highest playback resolution supported by the second decoder;

    After the first type of video is finished playing, controlling the first decoder to switch to the second decoder to play the start-up part of the data buffered in the second decoder;

    Receiving the resume part data corresponding to the second type of video from the server and distributing it to the first decoder for buffering, the playback resolution of the resume part data is higher than the highest playback resolution supported by the second decoder ;

    After the playback of the starting part of the data is completed, the second decoder is controlled to switch to the first decoder to play the continued part of the data buffered in the first decoder.

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