JP4815467B2 - Video signal processing device - Google Patents

Description

  The present invention relates to a video signal processing apparatus. For example, in addition to displaying an input video signal, the present invention has a function of outputting a video signal to the outside for recording or monitoring purposes. In addition, the present invention relates to a video signal processing apparatus having a function capable of confirming the image, and generates a display image based on data obtained by decoding a signal superimposed on a vertical blanking portion of the input video signal and outputs the display image to the display apparatus. The present invention relates to a video signal processing device having a function capable of performing self-diagnosis of each internal block.

  Conventionally, for example, a home appliance having a device for inputting a video signal and displaying the result of signal processing, such as a TV, performs a self-diagnosis of each internal block in order to determine that an internal defect has occurred. And displaying the result as a message on the display device, it is possible to inform the user what kind of trouble has occurred.

  However, there is no means for notifying the user of the self-diagnosis result when the display device has a problem that nothing is displayed. For this reason, unless it is possible to determine the symptom by appearance such as whether the power lamp is lit or not, it is necessary for the service person to open the housing and directly observe the internal substrate. As a result, it is difficult to open the housing at the user's home.

  In addition, since it is impossible to check the self-diagnosis result alone, it is necessary to prepare a network and a dedicated communication terminal and a jig for analyzing the symptom to determine what is occurring inside. It was.

  In addition, even if the video signal processing device itself can perform simple self-diagnosis, a special terminal is provided in the housing for detailed self-diagnosis even if it is presented to the user. However, it is necessary to work with a specific jig. For example, it is necessary to prepare a network and a dedicated communication terminal and a jig for analyzing symptoms, and to determine what is occurring inside. Opening the body itself may be difficult.

In addition, it has a self-diagnosis function that provides maintenance buttons on home appliances, performs self-diagnosis, notifies the service center of the situation correctly, and displays the diagnosis result on the display unit of the home appliance. For example, Japanese Patent Application Laid-Open No. H10-228561 has proposed a system.
Japanese Patent Laid-Open No. 2006-100951

  However, in the case of the detailed self-diagnosis in the above-described prior art, special terminals and jigs are not used during normal operation, but are used only when identifying a failure. It has become. Further, as disclosed in the above-mentioned Patent Document 1, the conventional technology for transmitting the result of self-diagnosis and taking countermeasures against troubles from a remote service center is such that home appliances to be diagnosed are connected to the network. Must be connected.

  Furthermore, although there is no problem as an apparatus to be diagnosed, there may be a case where the user does not want a state depending on the combination with the input signal (for example, a video signal having an aspect ratio of 4: 3 is input). In some cases, the auto-wide mechanism of the device operates regardless of the user's will, and the user may misunderstand that it is a failure). In such cases, there are many cases that are caused by settings inside the apparatus, and there are cases where the user himself / herself makes settings without understanding the contents, and there are many cases in which a defect is not found even after performing self-diagnosis.

  An object of the present invention is to provide an output signal generation circuit that can superimpose and transmit subtitle broadcasts or text broadcasts in the vertical blanking period of a recording or monitor video signal, thereby enabling each component block in the video signal processing apparatus to Self-diagnosis results can be confirmed, and there is a special terminal that can decode the signal superimposed in the vertical blanking period of the input video signal and superimpose commands such as self-diagnosis on the input video signal. It is another object of the present invention to provide a video signal processing apparatus that can perform self-diagnosis of each component block in the video signal processing apparatus.

In order to solve the above problems, the present invention mainly adopts the following configuration.
In a video signal processing apparatus having a plurality of constituent blocks for performing predetermined signal processing on an image signal and a synchronizing signal in a video signal with respect to an input video signal, and performing a self-diagnosis in each of the constituent blocks. A self-diagnosis unit for instructing and collecting the results, a control unit for encoding the self-diagnosis results, an output video signal generation unit for converting the input video signal into a format corresponding to an externally connected recording device, and outputting the signal A signal generation unit that generates information other than a video signal included in a vertical blanking period of the signal-converted output signal, and a superimposition unit that superimposes the signal-converted output signal and information from the signal generation unit. A code encoded as a result of the self-diagnosis is input to the signal generator, and the code is output by being superimposed on a vertical blanking period of the output signal. A configuration which allows observation of the self-diagnosis results by connecting the output to the monitor.

  Further, in a video signal processing apparatus having a plurality of constituent blocks provided for performing a plurality of signal processing on an input video signal and displaying the video, the input video signal corresponds to an externally connected recording device. An output video signal generating unit that converts the signal into a format and outputs; an information signal generating unit that generates information of a caption signal and a character signal superimposed in a vertical blanking period of the input video signal; and the output video signal generating unit Self-collecting self-diagnosis results of the plurality of constituent blocks, and a superimposing unit that superimposes an output video signal from the information signal generating unit and an output terminal that outputs a signal from the superimposing unit A diagnosis unit is provided, and the self-diagnosis result from the self-diagnosis unit is input to the information signal generation unit, so that the self-diagnosis result can be viewed on a monitor connected to the output terminal. A configuration that allows.

  According to the present invention, it is possible to identify a configuration block in which a problem has occurred in the video signal processing apparatus by observing a monitor without requiring a special terminal for confirming the self-diagnosis result. At this time, since the monitor can use a standardized CC signal or Teletext signal compatible TV, the self-diagnosis result can be observed without requiring a special jig or device.

  Also, self-diagnosis of each component block in the video signal processing device can be performed without requiring a special terminal by superimposing a command for self-diagnosis or adjustment processing in the vertical blanking period of the input signal. it can. Further, when a phenomenon (symptom or state) that is not a malfunction but is not desired by the user occurs when a specific input signal is applied, it is possible to confirm what setting is caused in which configuration block.

  The video signal processing apparatus according to the first embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a diagram showing an internal configuration of a video signal processing apparatus according to an embodiment of the present invention. FIG. 2 is a view showing a display example of a self-diagnosis result displayed on a monitor connected to the video signal processing apparatus according to the present embodiment. FIG. 3 is a diagram showing a display example of a CC (Closed Caption) signal used for the self-diagnosis result regarding the present embodiment. FIG. 4 is a diagram showing a display example of a Teletext signal used for the self-diagnosis result relating to the present embodiment.

  In the video signal processing apparatus 1 shown in FIG. 1, first, a video signal from an external playback device or the like is input from the input terminal 2. The ADC 3 samples the video signal, converts it to a digital signal, and sends it to the video input unit 4. In general video signal processing apparatuses, it is conceivable to input not only analog signals but also digital signals and high-speed serial signals such as DVI and HDMI. However, since these differences do not affect the characteristics of this embodiment, the input signal is described as an analog signal.

  The video input unit 4 detects synchronization from the input video signal to determine the effective area, converts the color space, adjusts the level, and decomposes the luminance signal and the color difference signal so as to facilitate the subsequent processing. Is sent to the video signal processing unit 5. Here, there is a case where transfer is performed via a memory for timing adjustment.

  The video signal processing unit 5 performs a signal conversion process necessary for displaying video on the display device 7, for example, when an interlace signal is input, performs an IP conversion process if necessary, and the resolution of the input signal is the display device 7. If it is different from the above, resolution conversion processing is performed. Further, image quality improvement processing such as enhancement of the contour of the video signal and correction of the color tone is performed. The video signal processed for display by the video signal processing unit 5 generates a synchronization signal for the display device 7 by the display signal generation unit 6, and the video signal and the synchronization signal are sent to the display device 7 together. The display device 7 is composed of an LCD or the like and displays the processed video signal.

  If it is necessary to perform self-diagnosis when the video signal processing apparatus 1 according to the present embodiment has a problem or the like, the self-diagnosis apparatus 10 detects each block (for example, the ADC 3, the video input unit 4, and the video in the present embodiment). The signal processing unit 5, the display signal generation unit 6, the display device 7, etc.) are instructed to perform self-diagnosis, and the results are collected. The results collected by the self-diagnosis device 10 are sent to the control device 9.

  The control device 9 outputs a sliced data of a closed caption signal (hereinafter referred to as a CC signal) or a teletext signal superimposed on the video signal sent from the slicer unit 8 during normal operation. However, when the self-diagnosis is performed, the result is encoded in accordance with the CC or Teletext standard, and is sent to the CC signal generation unit 22 and the Teletext signal generation unit 23 in the output signal generation unit 20.

  Here, CC (Closed Caption) and Teletext will be described. The CC signal is a subtitle broadcast mainly used in North America, and is transmitted superimposed on the 21st line in the vertical blanking period. CC can encode alphanumeric characters and symbols, put subtitles on the screen, and transmit program information such as viewing restrictions. In the United States, since 1993, it has been obligated to be mounted on TVs with a size of 13 inches or more. FIG. 3 shows a display example of the CC signal. The video signal displayed on the display device 7 is displayed like a caption.

  Teletext is a teletext broadcast used in the PAL area of Europe and Asia, and transfers data such as characters and simple figures using several lines in the vertical blanking period. The contents of the data are transmitted not only in subtitles but also in news, weather, sports, traffic information, leisure information, etc., and it is possible to select and display an arbitrary screen with a remote controller or the like. FIG. 4 shows a display example of the Teletext signal. An image created by decoding the Teletext signal is displayed on the display device 7.

  The video signal processing apparatus 1 has a system that outputs a video signal to a recording device such as an external VTR, in addition to the system that displays on the display device 7. Signals sent from the video input unit 4 to the video signal processing unit 5 are simultaneously sent to the output signal generation unit 20. The output signal generator 20 converts the video signal into a format that can be recorded by the external recording device. For example, since a VTR can only record SD signals, when a signal with a high resolution such as HD is input, a process of reducing the resolution by scaling or the like is required.

  In addition, the output signal generation unit 20 includes a CC signal generation unit 22 and a Teletext signal generation unit 23 for generating a CC signal and a Teletext signal in order to superimpose signals other than video in the vertical blanking period. The signals generated by the CC signal generation unit 22 and the Teletext signal generation unit 23 are superimposed at a position determined by the standard on the video signal in the MIX unit 24. The positions defined by the standard are the CC signal for the 21st and 263th lines in NTSC, and the Teletext signal for the PAL in the 6th to 22nd lines and 318th to 335th lines. is there.

  The signal generated by the output signal generator 20 is converted to an analog signal by the DAC 11 and output from the output terminal 12. Since the CC signal or Teletext signal superimposed on the output signal from the output video signal generator 21 is encoded with a self-diagnosis result, the internal terminal can be connected by connecting a TV corresponding to CC or Teletext to the output terminal. It becomes possible to confirm the result of diagnosis.

  FIG. 2 shows an example of the self-diagnosis result displayed on the monitor 30 corresponding to CC or Teletext. In the display example of FIG. 2, the self-diagnosis result is displayed using the CC signal. In the example of FIG. 2, the block B indicates that a failure has occurred as a result of self-diagnosis. Since CC and Teletext can only handle alphanumeric characters and symbols, for example, ADC is defined as block A, video input unit as block B, and video signal processing unit as block C, or names that can be expressed in alphanumeric characters.

  As a result, even if no video is output, it is possible to identify the location where the problem has occurred. In addition, the monitor connected to confirm the failure can be handled by a very common TV in the United States and Europe, so there is no need for a special jig, only for confirming the self-diagnosis result. No need for terminals.

  As described above, the video signal processing apparatus according to the first embodiment of the present invention has the following structural features. That is, the video signal input to the video signal processing apparatus of the present embodiment is subjected to signal processing for output to a display device provided in the video signal processing apparatus, and at the same time, the input video signal is externally transmitted. When converted to a recordable format and output to a connected recording device, the result of self-diagnosis in the video signal processing device is coded and output by superimposing it in the blanking period of the video signal Is.

  As a specific configuration of the first embodiment, the result of self-diagnosis can be easily confirmed on a monitor that can display a teletext signal by superimposing it in a teletext format in the blanking period of the video signal. Furthermore, the result of self-diagnosis can be easily confirmed on a monitor that can display the CC signal by superimposing it in the blanking period of the video signal in the closed caption (CC) format.

  Next, the details of the video signal processing apparatus according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a diagram showing an internal configuration of a video signal processing apparatus according to the second embodiment of the present invention. FIG. 6 is a diagram showing the vertical blanking period on the NTSC signal and the position of a CC (Closed Caption) signal. FIG. 7 is a diagram showing the vertical blanking period on the PAL signal and the position of the Teletext signal.

  In the video signal processing apparatus 1 according to the second embodiment shown in FIG. 5, the case of inputting an analog composite signal will be described in the present embodiment. The input signal is divided into a system for processing a video signal and a system for processing a signal superimposed in a vertical blanking period.

  First, a system for processing a video signal will be described. First, a video signal from an external playback device or the like is input from the input terminal 2. The input signal is sampled by the ADC 3, converted into a digital signal, and sent to the video input unit 4. The video input unit 4 first detects a vertical synchronization signal and a horizontal synchronization signal from the input video signal. The effective area of the video is determined from the vertical synchronization signal, and the vertical blanking period is determined. The composite signal is separated from the luminance signal and the color signal because the signal modulated in the color carrier wave is superimposed on the luminance signal with respect to the signal in the effective area. Further, the color signal is subjected to color decoding processing using a color carrier reproduced from the burst signal to be separated into color difference signals and sent to the video signal processing unit 5 together with the luminance signal. Here, there is a case where transfer is performed via a memory for timing adjustment. At the same time, the vertical blanking period signal is sent to the VBI signal decoder 38.

  The video signal processing unit 5 performs signal conversion processing necessary for displaying video on the display device 7, for example, when an interlace signal is input, performs IP conversion processing if necessary, and displays the resolution of the input signal. If it is different from the apparatus 7, resolution conversion processing or the like is performed. Further, image quality improvement processing such as enhancement of the contour of the video signal and correction of the color tone is performed. The video signal processed for display by the video signal processing unit 5 is sent to the display signal generation unit 6 to generate a synchronization signal for the display device 7 and the display device 7 by combining the video signal and the synchronization signal. Sent to. The display device 7 is composed of an LCD or the like and displays the processed video signal.

  Next, processing of signals superimposed on the vertical blanking period will be described. During the processing of the video signal, the signal in the vertical blanking period is sent to the VBI signal decoder 38. Signals to be superimposed in the vertical blanking period are, for example, CC (Closed Caption) is 21 lines in the NTSC standard (284 lines in the next vertical blanking period, see FIG. 6), and Teletext signals are 6 to 6 in the PAL standard. It is superimposed between 22 lines (see FIG. 7). The information of this line is taken in, decoded by a method defined by the standard, and converted into data.

  Not only characters but also information such as display position and color is sent to the Closed Caption and Teletext data, and the image generation unit 39 can generate an image based on the information. The generated image is sent to the display signal generator 6 and displayed by switching to the video signal or superimposed on the video signal.

  If it is necessary to perform self-diagnosis when a problem occurs in the video signal processing apparatus 1 according to the second embodiment, a code for performing self-diagnosis is superimposed on the signal superimposed in the vertical blanking period. The VBI signal decoder 38 receives and decodes this command, and analyzes each internal command from the decoded data and generates a command (for example, the ADC 3 and the video input unit 4 in this embodiment). And the video signal processing unit 5, the display signal generation unit 6, the display device 7 and the like) are instructed to the self-diagnosis device 41.

  The self-diagnosis device 41 instructs each component block to perform a self-diagnosis and collects the results. The results collected by the self-diagnosis device 41 are sent to the control unit 42. The control unit 42 converts the result sent from the self-diagnosis device 41 into a Closed Caption or Teletext format signal and sends it to the image generation unit 39. The image generation unit 39 creates an image in the same manner as the signal superimposed on the video signal and sends it to the display signal generation unit 6. As a result, it is possible to start self-diagnosis using a standardly mounted terminal, and it is possible to identify a location where a problem has occurred.

  Next, a case where self-diagnosis of a phenomenon (symptom) depending on a video signal is described. The input video signal uses a signal that can reproduce a state that the user does not want (for example, auto-wide that the user does not want when a video signal having a display aspect ratio of 4: 3 is input). When the function is activated and an image with an expanded aspect ratio (aspect ratio) is displayed, the user may misunderstand that the device is out of order. Therefore, the 4: 3 input video signal is used as the reproducible signal. ). In the vertical blanking period of the signal, the setting and adjustment of each internal block are investigated using the self-diagnosis device 41, and a command to be displayed is superimposed and input from the input terminal.

  Since the system that processes the video signal performs processing while being set (or adjusted), it is possible to reproduce a state that the user does not want (a state in which the auto wide function is activated). The result displayed after self-diagnosis of each internal block includes the setting value of each block and information indicating how the input signal was processed, and it is not desired at which internal stage It is possible to check whether the status is set. Furthermore, if the constituent block to be improved is found, the internal setting change itself is converted into a command and input, thereby making it possible to confirm that the phenomenon (symptom) has been improved simultaneously with the input of the command.

  The composite input has been described above. However, with respect to other analog signal input, for example, input from the S terminal, only processing in the video input unit is changed, and processing using a CC signal or Teletext signal is performed. Will not change. The input from the component terminal does not have a Closed Caption or Teletext standard depending on the resolution, but if the command can be superimposed, the same processing can be performed. In digital broadcasting, the Closed Caption signal and the Teletext signal are determined to be stored in a certain area in the data, and the same processing can be performed by using the data.

  As described above, the video signal processing apparatus according to the second embodiment of the present invention is outlined. The video video input / output terminal provided in the TV or the recording apparatus is used, and the video signal processing apparatus is input from the input terminal. In the vertical blanking period of the video signal, commands for performing self-diagnosis and adjustment processing are input superimposed as closed captions or teletext so that the processing can be controlled without preparing a special terminal. It has the following structural features. That is, in a video signal processing apparatus having a plurality of constituent blocks for displaying video by performing predetermined signal processing on an input video signal and a signal superimposed on an image signal in the video signal and a vertical blanking period A circuit that decodes a signal superimposed in the vertical blanking period, a circuit that creates a command for self-diagnosis from the decoded result, a self-diagnosis unit that supports self-diagnosis in each of the constituent blocks and collects a result, A control unit that encodes the self-diagnosis result; and an image generation unit that generates a display image from a signal superimposed in a vertical blanking period of the input video signal. In this case, self-diagnosis of each internal block is performed.

  In the video signal processing apparatus, the signal superimposed in the vertical blanking period of the input signal is a Teletext signal, has a circuit for decoding the Teletext signal, and the decoded signal is a command for self-diagnosis. Sends the command to the self-diagnosis circuit. Further, in the video signal processing device, the signal superimposed in the vertical blanking period of the input signal is a Closed Caption format signal, and has a device for decoding the Closed Caption signal, and the decoded signal is a command for self-diagnosis. In this case, the command is sent to the self-diagnosis circuit. Further, the signal superimposed in the vertical blanking period is a command for performing self-diagnosis, and a command for changing the setting and adjustment of each internal component block.

It is a figure which shows the internal structure of the video signal processing apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of a display of the self-diagnosis result displayed on the monitor connected to the video signal processing apparatus which concerns on 1st Embodiment. It is a figure which shows the example of a display of CC (Closed Caption) signal used for the self-diagnosis result regarding 1st Embodiment. It is a figure which shows the example of a display of the Teletext signal used for the self-diagnosis result regarding 1st Embodiment. It is a figure which shows the internal structure of the video signal processing apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the position of the vertical blanking period and CC (Closed Caption) signal on an NTSC signal. It is a figure which shows the position of the vertical blanking period and Teletext signal on a PAL signal.

Explanation of symbols

1 Video signal processor 2 Input terminal 3 ADC
4 video input unit 5 video signal processing unit 6 display signal generation unit 7 display device 8 slicer unit 9 control device 10 self-diagnosis device 11 DAC
DESCRIPTION OF SYMBOLS 12 Output terminal 15 CC signal display example 16 Teletext signal display example 20 Output signal generation part 21 Output video signal generation part 22 CC signal generation part 23 Teletext signal generation part 30 CC or Teletext corresponding monitor 31 Self-diagnosis result display example 38 VBI signal decoder 39 Image generation unit 40 Command analysis unit 41 Self-diagnosis device 42 Control unit

Claims (5)

In the video signal processing apparatus having a plurality of constituent blocks for performing predetermined signal processing on the image signal and the synchronization signal in the video signal with respect to the input video signal, and displaying the video,
A self-diagnosis unit for instructing self-diagnosis in each of the constituent blocks and collecting the results; a control unit for encoding the self-diagnosis results; and converting the input video signal into a format corresponding to an externally connected recording device An output video signal generator for output, a signal generator for generating information other than the video signal included in a vertical blanking period of the signal-converted output signal, the signal-converted output signal and information from the signal generator A superimposing unit that superimposes
The coded code of the self-diagnosis result is input to the signal generation unit, the code is superimposed on the vertical blanking period of the output signal, and the output is connected to a monitor to observe the self-diagnosis result A video signal processing device characterized by being made possible. In claim 1,
The signal generation unit is a generating unit that generates a Teletext signal, and superimposes and outputs the self-diagnosis result in a Teletext format so that the self-diagnosis result can be observed on a monitor corresponding to the Teletext. Signal processing device. In claim 1,
The signal generation unit is a generating means for generating a closed caption signal, the self-diagnosis result is superimposed in a closed caption format, and the self-diagnosis result can be observed on a monitor corresponding to the closed caption. Signal processing device. In claim 1, 2 or 3,
A video signal processing apparatus, wherein self-diagnosis results are collected for each constituent block in the video signal processing apparatus, and the self-diagnosis results for each constituent block can be observed on the monitor. In a video signal processing apparatus having a plurality of constituent blocks provided for performing a plurality of signal processing on an input video signal and displaying the video,
An output video signal generator for converting the input video signal into a format corresponding to an externally connected recording device and outputting it, and generating information on a caption signal and a character signal superimposed in the vertical blanking period of the input video signal An information signal generating unit, an output video signal from the output video signal generating unit and a superimposing unit that superimposes information from the information signal generating unit, and an output terminal that outputs a signal from the superimposing unit,
A self-diagnosis unit that collects self-diagnosis results of the plurality of constituent blocks; A video signal processing device characterized in that the image can be observed.

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