JP2011234296A - Abnormality detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormality detection device that can detect abnormal conditions on video output processing at a low cost.SOLUTION: A video reception and image display device 1 is an abnormality detection device for detecting abnormal conditions on display processing of video information to a user. The device includes: a video reception section 4 for receiving video information from the outside; an operation monitoring section 5 for determining whether hidden information, which is one of the video information received by the video reception section 4 and is information on a hidden area 22 that is not displayed to a user, follows a predetermined communication rule; and an image display section 2 for outputting information that shows an occurrence of abnormal conditions, when the hidden information is determined not to follow the communication rule by the operation monitoring section 5. This allows abnormal conditions on video output processing to be detected at a low cost.

Description

  The present invention relates to an abnormality detection device that detects an abnormal state in a display process of video information for a user.

  Conventionally, there has been proposed a system for switching from the active system to the standby system when a transmission abnormality in the active system is detected in the audio / video recording / playback apparatus duplicated by the active system and the standby system. For example, Patent Document 1 below discloses a transmission system that switches between an active system and a standby system by a system switch when an active video / audio signal is in an abnormal reproduction state. In this transmission system, a system switch as a receiver that receives a video / audio signal from the auxiliary data superimposing device and a broadcast system as an output device that outputs the video / audio signal from the system switch externally are configured separately. ing.

JP 2006-108875 A

  In the invention described in Patent Document 1, the system switch as a receiver that receives the video / audio signal from the auxiliary data superimposer and the broadcast system as the output device that outputs the video / audio signal from the system switch externally. Is a separate configuration. As a result, in order to detect that the current video / audio signal is in an abnormal playback state, a sending identification signal route as a playback state detection route is added separately from the transmission video / audio signal route as a video communication route. It is necessary. As described above, since it is necessary to add a route, the installation cost of the transmission system becomes relatively high.

  Accordingly, the present invention has been made to solve such a technical problem, and an object thereof is to provide an abnormality detection device that can detect an abnormal state in video output processing at a low cost.

  In order to achieve the above object, an abnormality detection apparatus according to the present invention is an abnormality detection apparatus for detecting an abnormal state in display processing of video information for a user, and includes a receiving means for receiving video information from the outside, and a receiving means. The non-display information that is non-display area information that is not displayed to the user among the video information received by the rule determination means for determining whether or not the predetermined communication rule is followed, and the non-display information by the rule determination means Output means for outputting information indicating the occurrence of an abnormal state when it is determined that the communication rule is not complied with.

  With this configuration, it is determined whether or not the non-display information in the video information received by the receiving unit conforms to the communication rule, and when it is determined that the non-display information does not comply with the communication rule, an abnormal state is indicated. Information is output. As described above, since the abnormal state is detected using the non-display information that is not displayed to the user, a communication route for detecting the abnormal state is unnecessary. As a result, by using this abnormality detection device, it is possible to detect an abnormal state in the video output process at a low cost.

  In addition, the abnormality detection apparatus further includes a change determination unit that determines whether or not display information that is display area information displayed to the user among the video information received by the reception unit has changed. The means determines whether or not the non-display information conforms to the communication rule when the change determination means determines that the display information has not changed, and the output means determines that the display information has changed by the change determination means In such a case, it is also preferable to output the display information.

  Thereby, when it is determined by the change determination means that the display information has not changed, it is determined whether or not the non-display information conforms to the communication rules, and the display information is determined to have changed by the change determination means. In this case, the display information is output. For this reason, when it is determined that the display information has changed, it is possible to perform normal output of the display information determined to have changed.

  ADVANTAGE OF THE INVENTION According to this invention, the abnormality detection apparatus which can detect the abnormal state in a video output process at low cost can be provided.

It is explanatory drawing for demonstrating the outline of the function by a video reception and image display. It is a functional block diagram for demonstrating the function structure of the video display system containing a video reception and image display. It is a flowchart which shows the flow of the video output process performed with a video output device. It is a flowchart which shows the flow of the abnormality detection process performed with a video reception and image display.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

(1) Outline of Function by Abnormality Detection Device First, an outline of a function by a video reception / image display as an abnormality detection device according to the present embodiment will be described with reference to FIG. FIG. 1 is an explanatory diagram for explaining an outline of functions of the video reception / image display 1. The video reception / image display 1 is attached to a vehicle such as an automobile (hereinafter referred to as the host vehicle), for example, and displays display video information (display information) such as navigation information for the user in the passenger compartment of the host vehicle. This is an information display device that displays and reproduces the image while receiving it, and detects an abnormal state in the display and reproduction processing.

  Here, the video reception and image display device 1 includes an image display unit 2 as a display screen. The image display unit 2 includes a display area 21 that is displayed and visible to the user, an image distortion countermeasure, and the like. And a non-display area 22 that is provided for the user and is not displayed. The video reception / image display 1 is non-display video information (non-display information) that is information corresponding to the non-display area 22 that is not displayed to the user and information indicating the operating state of the video reception / image display 1. ) Is used to detect an abnormal state of the video output device 7.

(2) Configuration of Video Reception / Image Display Next, the configuration of the video reception / image display 1 will be described with reference to FIG. FIG. 2 is a functional configuration diagram for explaining a functional configuration of the video display system 100 including the video reception / image display 1. In addition, the function by the video display system 100 is implement | achieved by ECU which is an electronic control apparatus mounted in the inside of the own vehicle, for example. The ECU is a unit whose main component is a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory) and the like.

  As shown in FIG. 2, the video display system 100 includes a video reception / image display 1 and a video output device 7 having a server function in different configurations, and the video reception / image display 1 and the video output device. 7 are connected to each other by a video route 6 as a video data transmission path.

  The video reception / image display 1 has an image display unit 2 (output unit), a superimposed image creation unit 3 (change determination unit), a video reception unit 4 (reception unit), and an operation monitoring unit 5 (rule determination unit). The video output device 7 includes a video output unit 8 (transmission unit), a video creation unit 9 (creation unit), and an operation state superimposing unit 10 (creation unit).

  First, each component of the video output device 7 will be described. The video creation unit 9 is a part that generates video information for display to be displayed in the display area 21 displayed to the user. The display video information is, for example, navigation information.

  The operation state superimposing unit 10 is a part that generates non-display video information that is information corresponding to the non-display area 22 that is not displayed to the user and is information indicating the operation state. This non-displayed video information is, for example, a predetermined communication rule (communication rule) indicating that it is operating normally by 1-dot image data that changes in black and white inversion every predetermined time (for example, 1 second). ).

  The video output unit 8 superimposes the non-displayed video information created by the operation state superimposing unit 10 on the display video information created by the video creating unit 9 to generate an output video. This is the part that outputs synchronously. The output video synchronously output by the video output unit 8 is input to the video receiving unit 4 via the video route 6 serving as a video data transmission path.

  Next, each component of the video reception / image display 1 will be described. The video receiver 4 is a part that receives an output video, which is video information for display on which non-displayed video information is superimposed, from an external device such as a video output device 7.

  The superimposed image creation unit 3 is a part that determines whether or not the video information for display has changed in the output video received by the video reception unit 4. Whether or not the video information for display has changed is determined by the superimposed image creation unit 3 executing a comparison process between the video information received this time and the video information received last time.

  When the superimposed image creation unit 3 determines that the video information for display has not changed, the operation monitoring unit 5 determines whether the non-displayed video information conforms to a predetermined communication rule (that is, the predetermined information described above). This is a part for determining whether or not the image data is one dot that is reversed in black and white every time. This communication rule is stored in advance in, for example, the ROM or RAM in the ECU.

  The image display unit 2 is a display unit that displays and outputs information indicating the occurrence of an abnormal state when the operation monitoring unit 5 determines that the non-displayed video information does not comply with the communication rule. This display output can improve the reliability for detecting an abnormal state. On the other hand, when it is determined by the operation monitoring unit 5 that the non-displayed video information conforms to the communication rule, the image display unit 2 continuously displays and outputs the display video information previously received by the video receiving unit 4. By doing so, the same video information is retained.

  Further, when the superimposed image creation unit 3 determines that the display video information has changed, the image display unit 2 displays and outputs the currently received display video information that has been determined to have changed.

(3) Flow of Video Output Processing in Video Output Device Next, the flow of video output processing (video output method) executed by the video output device 7 will be described with reference to FIG. FIG. 3 is a flowchart showing the flow of the video output process executed by the video output device 7. The process shown in the flowchart of FIG. 3 is mainly performed by the above-described ECU, and is repeatedly executed at a predetermined timing from when the video display system 100 is turned on to when it is turned off.

  First, the video creation unit 9 creates video information for display to be displayed in the display area 21 displayed to the user (step S01). Then, the operation state superimposing unit 10 creates non-display video information (operation state data) that is information corresponding to the non-display area 22 that is not displayed to the user and information indicating the operation state (step S02).

  Next, the video output unit 8 superimposes the non-displayed video information created by the operation state superimposing unit 10 on the display video information created by the video creating unit 9 to create an output video (step). S03). Then, the video output unit 8 outputs this output video to the video receiving unit 4 via the video route 6 (step S04). Thereby, a series of video output processing is completed.

(4) Flow of Abnormality Detection Processing in Video Reception / Image Display Next, the flow of abnormality detection processing (abnormality detection method) executed in the video reception / image display 1 will be described with reference to FIG. FIG. 4 is a flowchart showing the flow of abnormality detection processing executed by the video reception / image display 1. The process shown in the flowchart of FIG. 4 is mainly performed by the above-described ECU, and is repeatedly executed at a predetermined timing from when the video display system 100 is turned on to when it is turned off.

  First, the video receiver 4 receives an output video, which is video information for display on which non-displayed video information is superimposed, from the video output device 7 (step S11). Then, the superimposed image creating unit 3 determines whether or not the video information for display to be displayed in the display area 21 among the output video received by the video receiving unit 4 has changed (step S12). . If it is determined that the video information for display has changed, the process proceeds to step S13 described later. On the other hand, if it is determined that the video information for display has not changed, the process proceeds to step S14 described later.

  In step S <b> 13, the image display unit 2 displays and outputs the video information for display received this time by the video receiver 4. Thereby, a series of abnormality detection processing is completed.

  In step S14, the operation monitoring unit 5 determines whether or not the non-displayed video information corresponding to the non-display area 22 that is not displayed to the user complies with the communication rule. When it is determined that the non-display video information corresponding to the non-display area 22 is in accordance with the communication rule, the process proceeds to step S15 described later. On the other hand, when it is determined that the non-display video information corresponding to the non-display area 22 does not comply with the communication rule, the process proceeds to step S16 described later.

  In step S15, the image display unit 2 keeps the same video information by continuously displaying and outputting the display video information previously received by the video receiving unit 4. Thereby, a series of abnormality detection processing is completed.

  In step S <b> 16, the image display unit 2 displays and outputs information indicating the occurrence of an abnormal state of the video output device 7. As a result, the user can recognize the abnormal state, and a series of abnormality detection processing is completed.

(5) Actions and effects of the video reception / image display unit Of the video information received by the video reception unit 4 by the video reception / image display unit 1, non-display information that is information on the non-display area 22 that is not displayed to the user. When it is determined whether or not the video information conforms to a predetermined communication rule, and when it is determined that the non-displayed video information does not conform to the communication rule, information indicating the occurrence of an abnormal state is displayed and output.

  As described above, since the abnormal state is detected by effectively using only non-displayed video information that is not displayed to the user, it is not necessary to add a communication route for detecting the abnormal state. As a result, by using the video reception / image display 1, it is possible to detect an abnormal state in the video output processing at a low cost.

  Further, when the superimposed image creation unit 3 determines that the display video information has not changed, it is determined whether or not the non-displayed video information conforms to the communication rule, and is displayed by the superimposed image creation unit 3. When it is determined that the video information for use has changed, the video information for display is output. For this reason, when it is determined that the video information for display has changed, it is possible to perform normal output of the video information for display determined to have changed.

(6) Modification In the above embodiment, the video receiving unit 4 is configured to receive the output video from the video output unit 7, but the video receiving unit 4 is configured to receive the output video from outside the host vehicle by wireless communication. It is good.

  ADVANTAGE OF THE INVENTION According to this invention, the abnormality detection apparatus which can detect the abnormal state in a video output process at low cost can be provided.

DESCRIPTION OF SYMBOLS 1 ... Video reception and image display device, 2 ... Image display part, 3 ... Superimposed image preparation part, 4 ... Video reception part, 5 ... Operation | movement monitoring part, 6 ... Video route, 7 ... Video output device, 8 ... Video output part , 9: Video creation unit, 10: Operation state superimposing unit, 21: Display area, 22: Non-display area, 100: Video display system.

Claims (2)

An abnormality detection device for detecting an abnormal state in display processing of video information for a user,
Receiving means for receiving the video information from outside;
Rule determining means for determining whether or not non-display information that is information on a non-display area that is not displayed to the user among the video information received by the receiving means, is in accordance with a predetermined communication rule;
Output means for outputting information indicating the occurrence of an abnormal state when the rule determining means determines that the non-display information does not comply with the communication rule;
An abnormality detection device comprising: Of the video information received by the receiving means, further comprising a change determining means for determining whether display information that is information of a display area displayed to the user has changed,
The rule determining means determines whether or not the non-display information conforms to the communication rule when the change determining means determines that the display information has not changed,
The output means outputs the display information when the change determination means determines that the display information has changed,
The abnormality detection device according to claim 1.

Images