WO2018081987A1 - 多媒体信号异常处理方法及显示装置 - Google Patents

多媒体信号异常处理方法及显示装置 Download PDF

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Publication number
WO2018081987A1
WO2018081987A1 PCT/CN2016/104469 CN2016104469W WO2018081987A1 WO 2018081987 A1 WO2018081987 A1 WO 2018081987A1 CN 2016104469 W CN2016104469 W CN 2016104469W WO 2018081987 A1 WO2018081987 A1 WO 2018081987A1
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Prior art keywords
multimedia signal
received
multimedia
input interface
signal
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PCT/CN2016/104469
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English (en)
French (fr)
Inventor
王记
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深圳市柔宇科技有限公司
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Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to US16/399,688 priority Critical patent/US20200090623A1/en
Priority to EP16920731.3A priority patent/EP3537716A1/en
Priority to PCT/CN2016/104469 priority patent/WO2018081987A1/zh
Priority to CN201680036288.5A priority patent/CN107810640A/zh
Publication of WO2018081987A1 publication Critical patent/WO2018081987A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44231—Monitoring of peripheral device or external card, e.g. to detect processing problems in a handheld device or the failure of an external recording device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/4424—Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a multimedia signal abnormality processing method and a display device.
  • multimedia signal input interfaces can be an HDMI (High Definition Multimedia Interface, HDMI) input interface.
  • DVI Digital Visual Interface, digital display interface, referred to as DVI
  • the external device (which may be a head-mounted display device, a television, etc.) is connected through the multimedia signal input interface, and receives and displays the multimedia signal transmitted by the external device, and the multimedia signal may include a video signal, an audio and video signal, and the like.
  • the multimedia signal input interface is in poor contact with the external device, that is, when the multimedia signal received by the display device from the external device is unstable or the multimedia signal disappears instantaneously, a flower screen or a bright line phenomenon may appear on the display screen of the display device.
  • an embodiment of the present invention provides a multimedia signal abnormality processing method and a display device to prevent a flower screen or a bright line from appearing on a display screen of a display device.
  • the multimedia signal abnormality processing method provided by the embodiment of the present invention is applied to a display device, and the display device includes a multimedia signal input interface that can connect an external device and receive a multimedia signal from the external device, and the multimedia signal abnormality processing method includes: Determining whether an abnormality occurs in the multimedia signal received through the multimedia signal input interface; and outputting a preset picture signal to a central processing unit of the display device when an abnormality occurs in the multimedia signal received through the multimedia signal input interface And outputting, by the central processing unit, the preset picture signal to a display screen of the display device, where the preset picture signal includes multimedia signal abnormality prompt information.
  • the embodiment further provides a display device, including a multimedia signal input interface and a central processing unit.
  • the display device further includes a multimedia signal processor, the multimedia signal processor is connected between the multimedia signal input interface and the central processor, and is configured to determine that the multimedia signal input interface is received Whether an abnormality occurs in the multimedia signal, when an abnormality occurs in the multimedia signal received through the multimedia signal input interface, outputting a preset picture signal to the central processor, and outputting the preset picture by the central processing unit Signaling to the display screen, wherein the preset picture signal includes multimedia signal abnormality prompt information.
  • a picture signal including the multimedia signal abnormality prompt information is outputted to the central processor, and the central processor outputs the picture signal to the display screen. Therefore, it is possible to prevent the appearance of a flower screen or a bright line on the display screen, and also prompt the user that the multimedia signal is abnormal.
  • FIG. 1 is a flowchart of a method for processing an abnormality of a multimedia signal according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for processing an abnormality of a multimedia signal according to another embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a display device according to an embodiment of the present invention.
  • the multimedia signal exception processing method is applied to a display device.
  • the display device can be a display device with an image or text display function such as a head-mounted display device, a tablet computer, a computer, or a television. Set.
  • the display device includes a multimedia signal input interface connectable to an external device.
  • the multimedia signal input interface can be an HDMI input interface, a DVI input interface, or the like.
  • the external device may be a head mounted display device, a tablet computer, a computer, or the like.
  • the display device receives and displays a multimedia signal transmitted by the external device through the multimedia signal input interface.
  • the multimedia signal can be a video signal, an audio and video signal, or the like.
  • the multimedia signal exception processing method may include the following steps:
  • Step 100 Determine whether an abnormality occurs in the multimedia signal received through the multimedia signal input interface. If no, go to step 101; if yes, go to step 102.
  • the multimedia signal received through the multimedia signal input interface is an abnormal multimedia signal, or when the multimedia signal received through the multimedia signal input interface is interrupted (ie, the multimedia signal disappears instantaneously), it is determined.
  • the multimedia signal received through the multimedia signal input interface is abnormal.
  • the amplitude or frequency of change of the voltage of the received multimedia signal may be abnormal due to improper insertion operation, or the multimedia signal may be caused. It disappeared instantly.
  • the display device normally displays the multimedia signal
  • the plug of the data line is touched, the change amplitude or frequency of the voltage of the multimedia signal received by the display device may also be changed.
  • the amplitude is abnormal or the multimedia signal disappears instantaneously. If the multimedia signal transmitted by the external device itself is an abnormal multimedia signal, the multimedia signal received by the display device is necessarily an abnormal multimedia signal.
  • whether the received multimedia signal itself is an abnormal multimedia signal can be determined by the voltage of the received multimedia signal.
  • the magnitude of the change of the voltage of the received multimedia signal is not within the preset voltage variation range, determining that the received multimedia signal itself is an abnormal multimedia signal, the amplitude of the change of the voltage of the received multimedia signal falls.
  • the preset voltage variation range is within the range, it is determined that the received multimedia signal itself is a normal multimedia signal.
  • the multimedia signal input interface as an HDMI input interface as an example
  • the voltage of the received multimedia signal is 4% higher or lower than 5V
  • the received multimedia signal is a normal multimedia signal.
  • the voltage of the received multimedia signal is instantaneously 20% higher than 5V, or instantaneously 20% lower than 5V, it is determined that the received multimedia signal itself is an abnormal multimedia signal.
  • whether the received multimedia signal itself is an abnormal multimedia signal may be determined by the frequency of the received multimedia signal.
  • the magnitude of the change of the frequency of the received multimedia signal is not within the preset range of the frequency variation range, determining that the received multimedia signal itself is an abnormal multimedia signal, the amplitude of the change of the frequency of the received multimedia signal falls.
  • the preset frequency variation range is within the range, it is determined that the received multimedia signal itself is a normal multimedia signal. That is to say, if the frequency of the received multimedia signal becomes higher instantaneously or becomes lower instantaneously, it can be determined that the received multimedia signal itself is an abnormal multimedia signal.
  • Step 101 Output the received multimedia signal to a central processing unit of the display device, and output, by the central processing unit, the received multimedia signal to a display screen of the display device.
  • the received multimedia signal itself is a normal multimedia signal
  • the received multimedia signal is directly output to the central processor, and the received multimedia signal is displayed by the central processor. On the display screen.
  • Step 102 Output a preset picture signal to the central processing unit, and output, by the central processing unit, the preset picture signal to the display screen, where the preset picture signal includes a multimedia signal abnormality prompt information.
  • the central processor when the received multimedia signal is an abnormal multimedia signal, stopping outputting the received multimedia signal to the central processor, and outputting the preset picture signal to the central processor,
  • the central processor outputs the preset picture signal to the display screen to prompt the user that the multimedia signal has an abnormality.
  • the multimedia signal abnormality prompting information is abnormal for a change amplitude or a frequency of a voltage of the received multimedia signal, for example, A pure white picture is displayed on the display screen, and a prompt text indicating that the voltage or frequency of the received multimedia signal is abnormal is displayed.
  • the multimedia signal abnormality prompting information is interrupted by the multimedia signal, for example, displaying a pure white picture on the display screen, and displaying that the multimedia signal is interrupted. Prompt text.
  • different multimedia signal abnormality prompt information is output, so that the user can quickly judge the multimedia message according to the prompt information.
  • the type of the exception is to take the appropriate action. For example, when displaying the prompt text of the abnormality of the voltage or frequency of the received multimedia signal, it may be checked whether the external device inputs the multimedia signal normally, and may also check the connection of the multimedia signal input interface with the plug of the data line. Is it normal? When displaying the prompt text of the interruption of the multimedia signal, it may first check whether the connection of the multimedia signal input interface and the plug of the data line is normal.
  • a picture signal including the multimedia signal abnormality prompt information is output to the central processor, and the central processor outputs the picture signal to the display screen. Therefore, it is possible to prevent the appearance of a flower screen or a bright line on the display screen, and also prompt the user that the multimedia signal is abnormal.
  • FIG. 2 there is shown a flow chart of the steps of the multimedia signal exception processing method according to another embodiment of the present invention.
  • Step 200 Determine whether an abnormality occurs in the multimedia signal received through the multimedia signal input interface of the display device. If no, go to step 201, and if yes, go to step 202. Step 200 is the same as step 100, and details are not described herein again.
  • Step 201 Output the received multimedia signal to a central processing unit of the display device, and output, by the central processing unit, the received multimedia signal to a display screen of the display device.
  • Step 202 Output a preset picture signal to the central processing unit, and output, by the central processing unit, the preset picture signal to the display screen, where the preset picture signal includes a multimedia signal abnormality prompt information.
  • Step 202 is the same as step 102, and details are not described herein again.
  • Step 203 After outputting the preset picture signal to the central processor, determine whether a duration of occurrence of an abnormality of the multimedia signal received through the multimedia signal input interface reaches a preset time value. If yes, go to step 204; if no, it means that the multimedia signal becomes normal, go to step 201.
  • Step 204 Determine that the connection between the multimedia signal input interface and the external device is disconnected, send an instruction to the central processor, and generate, by the central processor, a display screen closing instruction in response to the instruction, where The instruction includes disconnecting the multimedia signal input interface from the external device, and turning off the information of the display.
  • the display device continuously receives the multimedia signal transmitted by the external device.
  • the multimedia signal transmitted by the external device is continuously received, it is determined that the multimedia signal received through the multimedia signal input interface continues to be abnormal.
  • the display device 300 in FIG. 3 may be a display device having an image or text display function such as a head mounted display device, a tablet computer, a computer, or a television.
  • the display device 300 includes a multimedia signal input interface 31, a multimedia signal processor 32, a central processing unit 33, and a display screen 34.
  • the display device is connected to an external device through the multimedia signal input interface 31, and receives a multimedia signal transmitted by the external device.
  • the multimedia signal input interface can be an HDMI input interface, a DVI input interface, or the like.
  • the external device may be a head mounted display device, a tablet computer, a computer, or the like.
  • the multimedia signal can be a video signal, an audio and video signal, or the like.
  • the central processing unit 33 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs having the same function or different functions.
  • IC integrated circuit
  • the multimedia signal processor 32 is connected between the multimedia signal input interface 31 and the central processing unit 33, and is configured to determine whether an abnormality occurs in the multimedia signal received through the multimedia signal input interface 31.
  • the multimedia signal received by the multimedia signal input interface 31 is not abnormal, the received multimedia signal is output to the central processing unit 33, and the received multimedia signal is output by the central processing unit 33 to the display screen 34.
  • the received multimedia signal itself is a normal multimedia signal, the received multimedia signal is directly output to the central processing unit 33, and the received multimedia signal is received by the central processing unit 33. Displayed on the display screen 34.
  • the multimedia signal processor 32 is further configured to output a preset picture signal to the central processing unit 33 when an abnormality occurs in the multimedia signal received through the multimedia signal input interface 31, and output by the central processing unit 33.
  • the preset picture signal is sent to the display screen 34, wherein the preset picture signal includes multimedia signal abnormality prompt information. That is, when an abnormality occurs in the received multimedia signal, the output of the received multimedia signal to the central processing unit 33 is stopped, and the preset picture signal is output to the central processing unit 33.
  • Central The processor 33 outputs the preset picture signal to the display screen 34 to prompt the user that the received multimedia signal has an abnormality.
  • the multimedia signal when the multimedia signal is received through the multimedia signal input interface 31 and the received multimedia signal itself is an abnormal multimedia signal, or when the multimedia signal is received through the multimedia signal input interface 31, the multimedia signal is interrupted (ie, multimedia) The signal disappears instantaneously, and it is judged that the multimedia signal received through the multimedia signal input interface 31 is abnormal.
  • the amplitude or frequency of change of the voltage of the received multimedia signal may be abnormal due to improper insertion operation, or may cause multimedia. The signal disappears instantly.
  • the display device 300 normally displays the multimedia signal
  • the plug of the data line is touched, the amplitude or frequency of the voltage of the multimedia signal received by the display device may also be caused.
  • the magnitude of the change is abnormal, or the multimedia signal disappears instantaneously. If the multimedia signal transmitted by the external device is an abnormal multimedia signal, the multimedia signal received by the display device 300 is necessarily an abnormal multimedia signal.
  • whether the received multimedia signal itself is an abnormal multimedia signal can be determined by the voltage of the received multimedia signal.
  • the magnitude of the change of the voltage of the received multimedia signal is not within the preset voltage variation range, determining that the received multimedia signal itself is an abnormal multimedia signal, the amplitude of the change of the voltage of the received multimedia signal falls.
  • the preset voltage variation range is within the range, it is determined that the received multimedia signal itself is a normal multimedia signal.
  • the multimedia signal input interface as an HDMI input interface as an example
  • the voltage of the received multimedia signal is 4% higher or lower than 5V
  • the received multimedia signal is a normal multimedia signal.
  • the voltage of the received multimedia signal is instantaneously 20% higher than 5V, or instantaneously 20% lower than 5V, it is determined that the received multimedia signal itself is an abnormal multimedia signal.
  • whether the received multimedia signal itself is an abnormal multimedia signal may be determined by the frequency of the received multimedia signal.
  • the magnitude of the change of the frequency of the received multimedia signal is not within the preset range of the frequency variation range, determining that the received multimedia signal itself is an abnormal multimedia signal, the amplitude of the change of the frequency of the received multimedia signal falls. Changing to the preset frequency When the amplitude range is within the range, it is determined that the received multimedia signal itself is a normal multimedia signal. That is to say, if the frequency of the received multimedia signal becomes higher instantaneously or becomes lower instantaneously, it can be determined that the received multimedia signal itself is an abnormal multimedia signal.
  • the multimedia signal abnormality prompting information is abnormal for a change amplitude or a frequency of a voltage of the received multimedia signal. For example, a pure white picture is displayed on the display screen, and a prompt text indicating that the voltage or frequency of the received multimedia signal is abnormal is displayed.
  • the multimedia signal abnormality prompt information is interrupted by the multimedia signal, for example, displaying a pure white picture on the display screen, and displaying the multimedia signal appearing Interrupted prompt text.
  • different multimedia signal abnormality prompt information is output, so that the user can quickly determine the type of the multimedia signal abnormality according to the prompt information, so as to take corresponding processing measures. For example, when displaying the prompt text of the abnormality of the voltage or frequency of the received multimedia signal, it may be checked whether the external device inputs the multimedia signal normally, and may also check the connection of the multimedia signal input interface with the plug of the data line. Is it normal? When displaying the prompt text of the interruption of the multimedia signal, it may first check whether the connection of the multimedia signal input interface and the plug of the data line is normal.
  • the multimedia signal processor 32 when determining that the received multimedia signal is abnormal, the multimedia signal processor 32 outputs a screen signal including the multimedia signal abnormality prompt information to the central processing unit 33, and is output by the central processing unit 33.
  • the picture signal is sent to the display screen 34, so that the phenomenon of blooming or bright lines on the display screen 34 can be prevented, and the user can be prompted to have an abnormality in the multimedia signal.
  • the multimedia signal processor 32 is further configured to determine whether a duration of occurrence of an abnormality of the multimedia signal received by the multimedia signal input interface 31 reaches a preset time value, and is received through the multimedia signal input interface 31. When the duration of the abnormality of the multimedia signal reaches the preset time value, determining that the connection of the multimedia signal input interface 31 with the external device is disconnected, and sending an instruction to the central processor, by the central processor In response to the instruction, generating a display off signal, wherein the instruction includes inputting the multimedia signal to interface 31 The connection of the external device is disconnected. Please turn off the information on the display.
  • the display device 300 continuously receives the multimedia signal transmitted by the external device.
  • the multimedia signal transmitted by the external device is continuously received, it is determined that the multimedia signal received through the multimedia signal input interface 31 continues to be abnormal.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

一种多媒体信号异常处理方法及显示装置，该方法包括：判断通过显示装置的多媒体信号输入接口接收到的多媒体信号是否出现异常（100）；在所接收到的多媒体信号出现异常时，输出预设的画面信号至显示装置的中央处理器，由中央处理器输出预设的画面信号至显示装置的显示屏，其中，预设的画面信号包括多媒体信号异常提示信息（102）。根据上述方法，在接收到的多媒体信号出现异常时，输出包括多媒体信号异常提示信息的画面信号至中央处理器，由中央处理器输出所述画面信号至显示装置的显示屏，从而既可防止在显示屏上出现花屏或亮线现象，还可提示用户多媒体信号出现异常。

Description

多媒体信号异常处理方法及显示装置 技术领域
本发明涉及显示技术领域，特别涉及一种多媒体信号异常处理方法及显示装置。
背景技术
目前很多显示装置(例如头戴显示设备、电视、计算机、平板电脑等)都具有多媒体信号输入接口，多媒体信号输入接口可为HDMI(High Definition Multimedia Interface，高清晰度多媒体接口，简称HDMI)输入接口、DVI(Digital Visual Interface，数字显示接口，简称DVI)输入接口等。通过多媒体信号输入接口连接外部设备(可为头戴显示设备、电视等)，并接收和显示外部设备传送的多媒体信号，多媒体信号可包括视频信号、音视频信号等。当多媒体信号输入接口与外部设备的接触不良时，即显示装置从外部设备接收到的多媒体信号不稳定或多媒体信号瞬间消失时，在显示装置的显示屏上会出现花屏或亮线现象。
发明内容
有鉴于此，本发明实施方式提供一种多媒体信号异常处理方法及显示装置，以防止在显示装置的显示屏上出现花屏或亮线现象。
本发明实施方式提供的多媒体信号异常处理方法，应用于显示装置，所述显示装置包括可连接外部设备并从所述外部设备接收多媒体信号的多媒体信号输入接口，所述多媒体信号异常处理方法包括：判断通过所述多媒体信号输入接口接收到的多媒体信号是否出现异常；以及在通过所述多媒体信号输入接口接收到的多媒体信号出现异常时，输出预设的画面信号至所述显示装置的中央处理器，由所述中央处理器输出所述预设的画面信号至所述显示装置的显示屏，其中，所述预设的画面信号包括多媒体信号异常提示信息。
本实施方式还提供一种显示装置，包括多媒体信号输入接口、中央处理器 及显示屏，所述显示装置还包括多媒体信号处理器，所述多媒体信号处理器连接于所述多媒体信号输入接口和所述中央处理器之间，用于判断通过所述多媒体信号输入接口接收到的多媒体信号是否出现异常，在通过所述多媒体信号输入接口接收到的多媒体信号出现异常时，输出预设的画面信号至所述中央处理器，由所述中央处理器输出所述预设的画面信号至所述显示屏，其中，所述预设的画面信号包括多媒体信号异常提示信息。
本发明实施方式中，在接收多媒体信号的过程中出现异常时，输出包括多媒体信号异常提示信息的画面信号至所述中央处理器，由所述中央处理器输出所述画面信号至所述显示屏，从而既可防止在所述显示屏上出现花屏或亮线现象，还可提示用户多媒体信号出现了异常。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一种实施方式中多媒体信号异常处理方法的流程图。
图2为本发明另一种实施方式中多媒体信号异常处理方法的流程图。
图3为本发明一种实施方式中显示装置的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
参考图1，其示出了本发明一种实施方式的多媒体信号异常处理方法的步骤流程图。所述多媒体信号异常处理方法应用于显示装置。所述显示装置可为头戴显示设备、平板电脑、计算机、电视等具有图像或文本显示功能的显示装 置。所述显示装置包括可连接外部设备的多媒体信号输入接口。所述多媒体信号输入接口可为HDMI输入接口、DVI输入接口等。所述外部设备可为头戴显示设备、平板电脑、计算机等。所述显示装置通过所述多媒体信号输入接口接收并显示所述外部设备传送的多媒体信号。所述多媒体信号可为视频信号、音视频信号等。所述多媒体信号异常处理方法可包括以下步骤：
步骤100，判断通过所述多媒体信号输入接口接收到的多媒体信号是否出现异常。若否，执行步骤101；若是，则执行步骤102。
其中，在通过所述多媒体信号输入接口接收到的多媒体信号本身为异常的多媒体信号时，或者在通过所述多媒体信号输入接口接收到的多媒体信号出现中断时(即多媒体信号瞬间消失)，判断出通过所述多媒体信号输入接口接收到的多媒体信号出现异常。在将连接外部设备的数据线的插头插入所述多媒体信号输入接口的过程中，可能会由于插入操作不当导致接收到的多媒体信号的电压的变化幅度或频率的变化幅度出现异常，或者导致多媒体信号瞬间消失。当然，在所述显示装置正常显示多媒体信号的过程中，若所述数据线的插头受到了触碰，则也可能会导致所述显示装置接收到的多媒体信号的电压的变化幅度或频率的变化幅度出现异常，或者导致多媒体信号瞬间消失。若所述外部设备传送的多媒体信号本身为异常的多媒体信号，那所述显示装置所接收到的多媒体信号势必为异常的多媒体信号。
可选地，可通过所接收到的多媒体信号的电压判断所接收到的多媒体信号本身是否为异常的多媒体信号。在所接收到的多媒体信号的电压的变化幅度不在预设的电压变化幅度范围内时，确定所接收到的多媒体信号本身为异常的多媒体信号，在所接收到的多媒体信号的电压的变化幅度落于所述预设的电压变化幅度范围内时，确定所接收到的多媒体信号本身为正常的多媒体信号。以所述多媒体信号输入接口为HDMI输入接口为例，当所接收到的多媒体信号的电压比5V高4％或低4％，则确定所接收到的多媒体信号本身为正常的多媒体信号。当所接收到的多媒体信号的电压瞬间比5V高20％，或者瞬间比5V低20％，确定所接收到的多媒体信号本身为异常的多媒体信号。
可选地，可通过所接收到的多媒体信号的频率判断所接收到的多媒体信号本身是否为异常的多媒体信号。在所接收到的多媒体信号的频率的变化幅度不在预设的频率变化幅度范围内时，确定所接收到的多媒体信号本身为异常的多媒体信号，在所接收到的多媒体信号的频率的变化幅度落于所述预设的频率变化幅度范围内时，确定所接收到的多媒体信号本身为正常的多媒体信号。也就是说，若所接收到的多媒体信号的频率瞬间变得较高，或瞬间变得较低，则可判断出所接收到的多媒体信号本身为异常的多媒体信号。
步骤101，输出所接收到的多媒体信号至所述显示装置的中央处理器，由所述中央处理器输出所接收到的多媒体信号至所述显示装置的显示屏。
也就是说，在所接收到的多媒体信号本身为正常的多媒体信号时，直接将所接收到的多媒体信号输出至所述中央处理器，由所述中央处理器将所接收到的多媒体信号显示在所述显示屏上。
步骤102，输出预设的画面信号至所述中央处理器，由所述中央处理器输出所述预设的画面信号至所述显示屏，其中，所述预设的画面信号包括多媒体信号异常提示信息。
也就是说，在所接收到的多媒体信号为异常的多媒体信号时，停止输出所接收到的多媒体信号至所述中央处理器，并输出所述预设的画面信号至所述中央处理器，由所述中央处理器输出所述预设的画面信号至所述显示屏，以提示用户多媒体信号出现了异常。
其中，在通过所述多媒体信号输入接口接收到的多媒体信号本身为异常的多媒体信号时，所述多媒体信号异常提示信息为接收到的多媒体信号的电压的变化幅度或频率的变化幅度出现异常，例如，在所述显示屏上显示纯白画面，并显示接收到的多媒体信号的电压或频率出现异常的提示文字。在通过所述多媒体信号输入接口接收到的多媒体信号出现中断时，所述多媒体信号异常提示信息为多媒体信号出现中断，例如，在所述显示屏上显示纯白画面，并显示多媒体信号出现中断的提示文字。在多媒体信号异常的类型不同时，输出不同的多媒体信号异常提示信息，如此，用户可根据提示信息快速地判断出多媒体信 号异常的类型，以便采取相应的处理措施。例如，在显示接收到的多媒体信号的电压或频率出现异常的提示文字时，可检查所述外部设备是否正常输入多媒体信号，还可检查所述多媒体信号输入接口与所述数据线的插头的连接是否正常。在显示多媒体信号出现中断的提示文字时，可首先检查所述多媒体信号输入接口与所述数据线的插头的连接是否正常。
本实施方式中，在所接收到的多媒体信号出现异常时，输出包括多媒体信号异常提示信息的画面信号至所述中央处理器，由所述中央处理器输出所述画面信号至所述显示屏，从而既可防止在所述显示屏上出现花屏或亮线现象，还可提示用户多媒体信号出现了异常。
参考图2，其示出了本发明另一种实施方式的多媒体信号异常处理方法的步骤流程图。
步骤200，判断通过显示装置的多媒体信号输入接口接收到的多媒体信号是否出现异常。若否，执行步骤201，若是，则执行步骤202。步骤200与步骤100相同，在此不再赘述。
步骤201，输出所接收到的多媒体信号至所述显示装置的中央处理器，由所述中央处理器输出接收到的多媒体信号至所述显示装置的显示屏。
步骤202，输出预设的画面信号至所述中央处理器，由所述中央处理器输出所述预设的画面信号至所述显示屏，其中，所述预设的画面信号包括多媒体信号异常提示信息。步骤202与步骤102相同，在此不再赘述。
步骤203，在输出所述预设的画面信号至所述中央处理器后，判断通过所述多媒体信号输入接口接收到的多媒体信号出现异常的持续时间是否达到预设时间值。若是，则执行步骤204；若否，表示多媒体信号变为正常，执行步骤201。
步骤204，确定所述多媒体信号输入接口与所述外部设备的连接断开，发送指令至所述中央处理器，由所述中央处理器响应所述指令，产生显示屏关闭指令，其中，所述指令包括所述多媒体信号输入接口与所述外部设备的连接断开请关闭显示屏的信息。
其中，在将所述数据线的插头完全拔出后，所述显示装置会持续接收不到所述外部设备传送的多媒体信号。在持续接收不到所述外部设备传送的多媒体信号时，判断出通过所述多媒体信号输入接口接收到的多媒体信号持续出现异常。
参考图3，其示意出本发明一种实施方式中的显示装置的结构示意图。图3中的显示装置300可为头戴显示设备、平板电脑、计算机、电视等具有图像或文本显示功能的显示装置。所述显示装置300包括多媒体信号输入接口31、多媒体信号处理器32、中央处理器33及显示屏34。所述显示装置通过所述多媒体信号输入接口31连接外部设备，并接收所述外部设备传送的多媒体信号。所述多媒体信号输入接口可为HDMI输入接口、DVI输入接口等。所述外部设备可为头戴显示设备、平板电脑、计算机等。所述多媒体信号可为视频信号、音视频信号等。所述中央处理器33可以由集成电路(Integrated Circuit，简称IC)组成，例如可以由单颗封装的IC所组成，也可以由连接多颗相同功能或不同功能的封装IC而组成。
所述多媒体信号处理器32连接于所述多媒体信号输入接口31和所述中央处理器33之间，用于判断通过所述多媒体信号输入接口31接收到的多媒体信号是否出现异常，在通过所述多媒体信号输入接口31接收到的多媒体信号没有出现异常时，输出所接收到的多媒体信号至所述中央处理器33，由所述中央处理器33输出所接收到的多媒体信号至所述显示屏34。也就是说，在所接收到的多媒体信号本身为正常的多媒体信号时，直接将所接收到的多媒体信号输出至所述中央处理器33，由所述中央处理器33将所接收到的多媒体信号显示在所述显示屏34上。所述多媒体信号处理器32还用于在通过所述多媒体信号输入接口31接收到的多媒体信号出现异常时，输出预设的画面信号至所述中央处理器33，由所述中央处理器33输出所述预设的画面信号至所述显示屏34，其中，所述预设的画面信号包括多媒体信号异常提示信息。也就是说，在所接收到的多媒体信号出现异常时，停止输出所接收到的多媒体信号至所述中央处理器33，并输出所述预设的画面信号至所述中央处理器33，由所述中央 处理器33输出所述预设的画面信号至所述显示屏34，以提示用户所接收到的多媒体信号出现了异常。
其中，在通过所述多媒体信号输入接口31接收到多媒体信号且所接收到的多媒体信号本身为异常的多媒体信号时，或者在通过所述多媒体信号输入接口31接收到多媒体信号出现中断时(即多媒体信号瞬间消失)，判断出通过所述多媒体信号输入接口31接收到的多媒体信号出现异常。在将连接外部设备的数据线的插头插入所述多媒体信号输入接口31的过程中，可能会由于插入操作不当导致接收到的多媒体信号的电压的变化幅度或频率的变化幅度出现异常，或者导致多媒体信号瞬间消失。当然，在所述显示装置300正常显示多媒体信号的过程中，若所述数据线的插头受到了触碰，则也可能会导致所述显示装置接收到的多媒体信号的电压的变化幅度或频率的变化幅度出现异常，或者导致多媒体信号瞬间消失。若所述外部设备传送的多媒体信号本身为异常的多媒体信号，那所述显示装置300所接收到的多媒体信号势必为异常的多媒体信号。
可选地，可通过所接收到的多媒体信号的电压判断所接收到的多媒体信号本身是否为异常的多媒体信号。在所接收到的多媒体信号的电压的变化幅度不在预设的电压变化幅度范围内时，确定所接收到的多媒体信号本身为异常的多媒体信号，在所接收到的多媒体信号的电压的变化幅度落于所述预设的电压变化幅度范围内时，确定所接收到的多媒体信号本身为正常的多媒体信号。以所述多媒体信号输入接口为HDMI输入接口为例，当所接收到的多媒体信号的电压比5V高4％或低4％，则确定所接收到的多媒体信号本身为正常的多媒体信号。当所接收到的多媒体信号的电压瞬间比5V高20％，或者瞬间比5V低20％，确定所接收到的多媒体信号本身为异常的多媒体信号。
可选地，可通过所接收到的多媒体信号的频率判断所接收到的多媒体信号本身是否为异常的多媒体信号。在所接收到的多媒体信号的频率的变化幅度不在预设的频率变化幅度范围内时，确定所接收到的多媒体信号本身为异常的多媒体信号，在所接收到的多媒体信号的频率的变化幅度落于所述预设的频率变 化幅度范围内时，确定所接收到的多媒体信号本身为正常的多媒体信号。也就是说，若所接收到的多媒体信号的频率瞬间变得较高，或瞬间变得较低，则可判断出所接收到的多媒体信号本身为异常的多媒体信号。
其中，在通过所述多媒体信号输入接口31接收到的多媒体信号本身为异常的多媒体信号时，所述多媒体信号异常提示信息为接收到的多媒体信号的电压的变化幅度或频率的变化幅度出现异常，例如，在所述显示屏上显示纯白画面，并显示接收到的多媒体信号的电压或频率出现异常的提示文字。在在通过所述多媒体信号输入接口31接收到的多媒体信号出现中断时，所述多媒体信号异常提示信息为多媒体信号出现中断，例如，在所述显示屏上显示纯白画面，并显示多媒体信号出现中断的提示文字。在多媒体信号异常的类型不同时，输出不同的多媒体信号异常提示信息，如此，用户可根据提示信息快速地判断出多媒体信号异常的类型，以便采取相应的处理措施。例如，在显示接收到的多媒体信号的电压或频率出现异常的提示文字时，可检查所述外部设备是否正常输入多媒体信号，还可检查所述多媒体信号输入接口与所述数据线的插头的连接是否正常。在显示多媒体信号出现中断的提示文字时，可首先检查所述多媒体信号输入接口与所述数据线的插头的连接是否正常。
本实施方式中，所述多媒体信号处理器32在判断出所接收到的多媒体信号出现异常时，输出包括多媒体信号异常提示信息的画面信号至所述中央处理器33，由所述中央处理器33输出所述画面信号至所述显示屏34，从而既可防止在所述显示屏34上出现花屏或亮线现象，还可提示用户多媒体信号出现了异常。
进一步，所述多媒体信号处理器32还用于判断通过所述多媒体信号输入接口31接收到的多媒体信号出现异常的持续时间是否达到预设时间值，以及在通过所述多媒体信号输入接口31接收到的多媒体信号出现异常的持续时间达到所述预设时间值时，确定所述多媒体信号输入接口31与所述外部设备的连接断开，发送指令至所述中央处理器，由所述中央处理器33响应所述指令，产生显示屏关闭信号，其中，所述指令包括将所述多媒体信号输入接口31与 所述外部设备的连接断开请关闭显示屏的信息。
其中，在将所述数据线的插头完全拔出后，所述显示装置300会持续接收不到所述外部设备传送的多媒体信号。在持续接收不到所述外部设备传送的多媒体信号时，判断出通过所述多媒体信号输入接口31接收到的多媒体信号持续出现异常。
以上所述是本发明的优选实施例，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (14)

  1. 一种多媒体信号异常处理方法，应用于显示装置，所述显示装置包括可连接外部设备并从所述外部设备接收多媒体信号的多媒体信号输入接口，其特征在于，所述方法包括：
    判断通过所述多媒体信号输入接口到的多媒体信号是否出现异常；以及
    在通过所述多媒体信号输入接口接收到的多媒体信号出现异常时，输出预设的画面信号至所述显示装置的中央处理器，由所述中央处理器输出所述预设的画面信号至所述显示屏，其中，所述预设的画面信号包括多媒体信号异常的提示信息。
  2. 如权利要求1所述的多媒体信号异常处理方法，其特征在于，在所接收到的多媒体信号的电压的变化幅度不在预设的电压变化幅度范围内时，确定所接收到的多媒体信号为异常的多媒体信号。
  3. 如权利要求1所述的多媒体信号异常处理方法，其特征在于，在所接收到的多媒体信号的频率的变化幅度不在预设的频率变化幅度范围内时，确定所接收到的多媒体信号为异常的多媒体信号。
  4. 如权利要求2或3所述的多媒体信号异常处理方法，其特征在于，所述多媒体信号异常提示信息为接收到的多媒体信号的电压或频率出现异常。
  5. 如权利要求1所述的多媒体信号异常处理方法，在通过所述多媒体信号输入接口接收到的多媒体信号出现中断时，确定通过所述多媒体信号输入接口接收到的多媒体信号出现异常。
  6. 如权利要求5所述的多媒体信号异常处理方法，其特征在于，所述多媒体信号异常提示信息为多媒体信号出现中断。
  7. 如权利要求1所述的多媒体信号异常处理方法，其特征在于，在输出所述预设的画面信号至所述中央处理器后，所述方法还包括：
    判断通过所述多媒体信号输入接口接收到的多媒体信号出现异常的持续时间是否达到预设时间值；
    在通过所述多媒体信号输入接口接收到的多媒体信号出现异常的持续时间达到所述预设时间值时，确定所述多媒体信号输入接口与所述外部设备的连接断开，发送指令至所述中央处理器，由所述中央处理器响应所述指令产生显示屏关闭信号，其中，所述指令包括所述多媒体信号输入接口与所述外部设备的连接断开并关闭所述显示屏的信息。
  8. 一种显示装置，包括多媒体信号输入接口、中央处理器及显示屏，其特征在于，所述显示装置还包括多媒体信号处理器，所述多媒体信号处理器连接于所述多媒体信号输入接口和所述中央处理器之间，用于判断通过所述多媒体信号输入接口接收到的多媒体信号是否出现异常，在通过所述多媒体信号输入接口接收到的多媒体信号出现异常时，输出预设的画面信号至所述中央处理器，由所述中央处理器输出所述预设的画面信号至所述显示屏，其中，所述预设的画面信号包括多媒体信号异常提示信息。
  9. 如权利要求8所述的显示装置，其特征在于，所述多媒体信号处理器在判断出所接收到的多媒体信号的电压的变化幅度不在预设的电压变化幅度范围内时，确定所接收到的多媒体信号为异常的多媒体信号。
  10. 如权利要求8所述的显示装置，其特征在于，所述多媒体信号处理器在判断出所接收到的多媒体信号的频率的变化幅度不在预设的频率变化幅度范围内时，确定所接收到的多媒体信号为异常的多媒体信号。
  11. 如权利要求9或10所述的显示装置，其特征在于，所述多媒体信号异常提示信息为接收到的多媒体信号的电压或频率出现异常。
  12. 如权利要求8所述的显示装置，其特征在于，所述多媒体信号处理器在判断出通过所述多媒体信号输入接口接收到的多媒体信号出现中断时，确定通过所述多媒体信号输入接口接收到的多媒体信号出现异常。
  13. 如权利要求12所述的显示装置，其特征在于，所述多媒体信号异常提示信息为多媒体信号出现中断。
  14. 如权利要求8所述的显示装置，其特征在于，所述多媒体信号处理器还用于判断通过所述多媒体信号输入接口接收到的多媒体信号出现异常的持续时间是否达到预设时间值，以及在通过所述多媒体信号输入接口接收到的多媒体信号出现异常的持续时间达到所述预设时间值时，确定所述多媒体信号输入接口与所述外部设备的连接断开，发送指令至所述中央处理器，由所述中央处理器响应所述指令，产生显示屏关闭信号，所述指令包括所述多媒体信号输入接口与所述外部设备的连接断开并关闭所述显示屏的信息。
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