JP2007318659A - Video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device in which operability is high for an unskilled user by simplifying operation procedures. <P>SOLUTION: In a video display device 1, analog signals are inputted to a plurality of input terminals 11, respectively. A terminal selection unit 18 selects any one of input terminals. A video processing unit 12 detects LINE 21 data of analog video signals contained in the analog signals, respectively. For an analog video signal in which display instruction information and device information are detected from the LINE21 data, character data of "forcible display mode" are superimposed, predetermined character data of device information of an output device are superimposed, and video contents are displayed on a display unit 13 in an optimum display mode corresponding to the device information. When such an analog video signal is interrupted, another analog video signal is selected and displayed on the display unit 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video display device that displays video based on an input analog video signal on a display unit.

  Currently, video is distributed to general households from various types of media such as terrestrial broadcasting, CS (communication satellite) broadcasting, CATV broadcasting (cable TV broadcasting), etc., and their decoders and set-top boxes (STBs) ) And other video output devices are increasing. In addition to the video output devices described above, there are increasing numbers of video output devices such as various types of AV equipment such as DVD (digital versatile disc) players, game machines, and video recorders.

  In the conventional video display device, analog video signals from a plurality of video output devices are respectively input to the input terminals, and the video of the analog video signal corresponding to the channel selected by the user is displayed on the display unit. .

  In addition, when displaying a video on the display unit, a composite video in which characters related to the channel number and channel name selected by the user are superimposed on the video is generated using an on-screen display (OSD) function, and the video is displayed. The channel selection state of the display device may be displayed on the display unit.

  In addition, when displaying a video on the display unit, an on-screen display (OSD) indicates a character relating to an operating state of the video output device, for example, whether or not descrambling is possible in a video content decoder on which scramble is superimposed such as CATV. In some cases, the operation state of the video output device is displayed on the display unit.

  For example, in Patent Document 1, information regarding the operation state of the video output device is superimposed on the LINE 21 of the analog video signal output from the video output device. Then, using the OSD function of the video display device, a composite video is generated by superimposing characters representing the operating state of the video output device on the video, and the operating state of the video output device is displayed on the display unit. Note that LINE21 is generally a vertical blanking period of an analog video signal such as a TV on which a caption character called a closed caption is superimposed.

In this way, the OSD function is used to generate a composite video in which a character related to the state of the video output device is superimposed on the video, and OSD-displayed on the display unit. It was possible to figure out.
JP-A-8-19059

  In the conventional video display device, the channel is switched by the user's channel selection, and the video of each channel is displayed on the display unit. For example, when using DVD content, the user first activates the DVD player connected to the input terminal, and selects the channel corresponding to the input terminal to which the DVD player is connected as the channel of the video display device. Therefore, a series of operation procedures such as loading the DVD medium onto the DVD player and pressing the playback button of the DVD player are necessary.

  Such various operations are easy for users who are familiar with the operation of the video display device and the video output device, but are complicated for users who are unfamiliar with the operation and often have erroneous operation procedures. In particular, an incorrect channel is often selected when selecting a channel in a video display device.

  When a channel of the video display device is selected, a composite video in which characters corresponding to each channel, for example, characters such as “video 1”, “video 2”, and “game” are superimposed on the video is generated and displayed on the display unit by OSD. Thus, errors in channel selection can be reduced. However, in the case of a user who is unfamiliar with the operation, channel selection may be wrong even if such an OSD display is seen. In Patent Document 1, a character relating to the state of the video output device is OSD-displayed on the display unit. This is to make it possible to confirm the operation state after the video display device is reproduced, and to reduce channel selection errors. It wasn't. Thus, conventionally, it has not been possible to provide a video display device with high operability for an unfamiliar user.

  An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an image display apparatus that can simplify an operation procedure and eliminate a user's channel selection error.

  The video display device of the present invention has the following configuration in order to solve the above problems.

(1) A plurality of input terminals to which an analog video signal is input, a terminal selection unit that selects any one of the input terminals, and a video based on the analog video signal of the input terminal selected by the terminal selection unit is displayed on the display. A display processing unit that detects display command information from the LINE21 data of the analog video signal, and the terminal selection unit receives the display command information by the display command detection unit. The detected input terminal is selected.

  With this configuration, with respect to an analog video signal for which display command information is detected, it is possible to automatically switch channels and display a video based on the analog video signal without requiring a user to select a channel. become. Therefore, the operation procedure for displaying the video content output from the video output device can be simplified, and mistakes in channel selection of the video display device by a user with low proficiency can be eliminated.

(2) When the input of the analog video signal at the input terminal where the display command information is detected is interrupted, the terminal selection unit switches the selection to another input terminal.

  In this configuration, not only when the analog video signal in which the display command information is detected is reproduced, but also when the analog video signal is interrupted, such as at the end of the reproduction, a specific operation is not necessary, and other Video can be displayed.

(3) The video processing unit displays on the display a composite video in which a character corresponding to the display command information is superimposed on a video based on the analog video signal from which the display command information is detected.

  In this configuration, by detecting the input display command information, character data corresponding to the display command information, for example, character data such as “forced display mode” is superimposed on the video content by the OSD function and is displayed on the display unit. Display OSD.

(4) From the LINE21 data of the analog video signal from which the display command information is detected, there is provided device information detection means for detecting device information of the output device that has output the analog video signal, and the video processing unit includes the device A composite video in which a character corresponding to the device information detected by the information detection means is superimposed on a video based on the analog video signal from which the display command information is detected is displayed on the display.

  In this configuration, the video output device outputs device information of the output device as LINE21 data of an analog video signal. Then, when the video display device detects the device information, character data corresponding to the device information, for example, character data such as a device name, an output terminal name, and a video content name is superimposed on the video content by the OSD function, The OSD is displayed on the display unit.

(5) having a display mode storage means for storing in advance a display mode set for each piece of device information;
The video processing unit displays a video based on the analog video signal on the display in the display mode corresponding to the detected device information.

  With this configuration, the display mode, for example, brightness adjustment, contrast adjustment, screen layout, audio mode, etc., is automatically set without any user setting operation, and video content is displayed on the display unit. .

  According to the present invention, it is possible to provide a video display device that simplifies the user's operation and eliminates a mistake in channel selection of the video display device by a user having a low level of proficiency with respect to device operation.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a block diagram showing a schematic configuration of a video output device and a video display device. Here, as the video display device 1, an example is shown in which a television receiver that receives terrestrial analog broadcast from an antenna 3 is used. As the video output device, a DVD player, a CATV decoder, a CS decoder, or the like can be used. Here, an example using the DVD player 2 is shown.

  First, the configuration and basic operation of the video display device 1 will be described.

  The video display device 1 includes input terminals 11A to 11C, a video processing unit 12, a display unit 13, a control unit 14, a remote control receiving unit 15, an operation unit 16, a device information table 17, and a terminal selection unit 18.

  An analog terrestrial broadcast RF signal received by the antenna 3 is input to the input terminal 11C. An analog video signal output from the DVD player 2 is input to the input terminal 11A. An analog video signal output from an external device (another video output device) to be connected is input to the input terminal 11B. Here, the input terminal 11C is an antenna input terminal to which an RF signal obtained by multiplexing an audio signal with an analog video signal of terrestrial broadcasting is input. The input terminals 11A and 11B are analog terminals to which analog video signals not including audio signals are input, and the audio signals are connected and input to another terminal (not shown). Note that the audio signal input to the other terminal is emitted from a speaker (not shown) via an audio processing unit (not shown).

  The terminal selection unit 18 receives channel control from the control unit 14. One of the input terminals 11A to 11C is selected according to the channel control, and an analog video signal input to the input terminal is output to the video processing unit 12.

  The video processing unit 12 processes the video content included in the input analog video signal so that the video can be displayed on the display unit 13. When the input signal is an analog terrestrial broadcast RF signal received by the antenna 3, an analog terrestrial broadcast that selects a predetermined frequency and separates an audio signal and an analog video signal from the RF signal of that frequency. The tuner function is provided. The audio signal separated by the tuner function is output to an audio processing unit (not shown).

  The video processing unit 12 has OSD control means, and when character data for closed captioning is detected from the LINE 21 of the input analog video signal, the video data is combined with the video content (OSD processing). The video content subjected to the OSD process is output to the display unit 13. The display unit 13 displays the video content input from the video processing unit 12. When the channel is switched by the user's operation, the OSD control unit generates a composite video in which characters corresponding to the channel are superimposed on the video, and outputs the composite video to the display unit 13.

  The remote control receiving unit 15 receives a control signal such as a channel switching signal transmitted from the remote control by infrared rays or radio waves and outputs it to the control unit 14. The operation unit 16 includes a plurality of operation keys such as an up / down key for performing a channel switching operation, and controls a channel switching signal or the like in the same manner as the remote control reception unit 15 according to the operation of the operation key. The signal is output to the control unit 14. The control unit 14 controls the operation of the terminal selection unit 18. In accordance with a control signal such as a channel switching signal input from the remote control receiver 15 or the operation unit 16, the terminal selection unit 18 is made to select an input terminal corresponding to the channel designated by the user.

  The device information table 17 stores in advance device information codes, character data corresponding to these device information codes, and display modes corresponding to these device information codes. The device information table 17 will be described later.

  Next, the configuration and basic operation of the DVD player 2 will be described.

  The DVD player 2 includes output terminals 21A and 21B, a disk drive motor 26, a pickup 25, a video processing unit 22, a servo controller 23, and a control unit 24.

  A DVD disc (not shown) on which video content is recorded is set in the apparatus main body. The control unit 24 controls the operation of the apparatus main body. The disk drive motor 26 rotates a DVD disk (not shown) under the control of the servo controller 23. Further, the position of the pickup 25 is controlled according to the control of the servo controller 23. The pickup 25 irradiates the data recording surface of the optical disc with laser from a controlled position, and reads data recorded on the recording surface. The video processing unit 22 extracts video content, audio content, and closed caption caption content from the read signal read from the DVD disc. The video content and subtitle content are converted into an analog video signal. The caption content is superimposed on the LINE 21 in the vertical blanking period of the analog video signal, and the video content is superimposed on the video display period of the analog video signal. The analog video signal thus converted by the video processing unit 22 is output to the input terminal 11A of the video display device 1 via the output terminal 21B. Further, a device (not shown) that receives an analog video signal is connected to the output terminal 21A. The audio signal is output to the video display device 1 from another terminal (not shown).

  By the video display device 1 and the DVD player 2 described above, an analog video signal of DVD content is input from the DVD player 2 to the video display device 1. Therefore, in the video display device 1, when the channel corresponding to the input terminal 11A is selected, video content and subtitle content of the DVD media are displayed on the display unit 13.

  Note that although the DVD player 2 extracts video content, audio content, and closed caption subtitle content from the read signal from the DVD media, the subtitle content of the DVD media does not always exist.

  Therefore, in the present embodiment, the display command code and the device information code are displayed on the LINE 21 in the vertical blanking period of the analog video signal every time the video processing unit 22 starts reading without subtitle content, or every time a certain time has elapsed after reading. Is superimposed. The device information code is an identification code such as a code unique to the DVD player 2, a code unique to the output terminal 21B, or a code unique to the video content.

  Here, a processing flow in the case where a display command code and a device information code are superimposed on an analog video signal for a certain period from the beginning of reading when no subtitle content exists in the read signal from the DVD medium will be described with reference to FIG. The video processing unit 22 of the DVD player 2 determines whether or not the video content is initially read (S1). If the reading is in the initial stage, an analog video signal is extracted (S2). Next, the display command code and the video signal code are superimposed on the analog video signal LINE 21 (S4). Then, the analog video signal is output from the output terminal to the video display device 1 (S5).

  A processing flow in the case where a display command code and a video signal code are superimposed on an analog video signal each time a predetermined time elapses from the initial stage of reading video content from a DVD medium will be described with reference to FIG. The video processing unit 22 of the DVD player 2 determines whether or not a predetermined time has elapsed since the initial reading of the video content (S11). If it has elapsed, an analog video signal is extracted (S16). Next, if there is a caption content in the LINE 21 of the analog video signal, it is read and buffered (S17). On the other hand, a display command code and a video signal code are newly superimposed on the LINE 21 of the analog video signal (S18). Then, the analog video signal is output from the output terminal to the video display device 1 (S19).

  If a certain time has not elapsed, an analog video signal is extracted (S12). Next, if there is a caption content in the LINE 21 of the analog video signal, it is read out and buffered (S13). Next, subtitle content that has been read before and has not been output is read from the top of the buffer (S14). Then, the caption content is superimposed on the analog video signal LINE 21 (S15). Then, the analog video signal is output from the output terminal to the video display device 1 (S19).

  On the other hand, the video display device 1 detects whether or not a display command code and a device information code are included in the analog video signal of each input terminal. Therefore, the control unit 14 of the video display device 1 is provided with channel scanning means, and the video processing unit 12 is provided with display command detection means and device information detection means.

  FIG. 4 shows a processing flow when the video display apparatus 1 detects the display command code and the device information code from the analog video signal. Specifically, after the user performs a playback operation on the DVD player 2, the control unit 14 causes the terminal selection unit 18 to input all the input terminals 11 </ b> A to 11 </ b> A to 11 </ b> A by performing a specific operation on the video display device 1. 11C scanning is performed (S21). At that time, the video processing unit 12 detects display command information from the LINE 21 of each analog video signal (S22). If there is an analog video signal in which the display command code is detected, the video processing unit 12 transmits the input terminal number to the control unit, and the control unit 14 controls the terminal selection unit 18 to select the input terminal ( S24). At this time, the device information code is also detected (S25). If the device information code detected from the LINE 21 of the analog video signal matches the device information code stored in the device information table, the device information code is detected. A display mode (for example, brightness adjustment, contrast adjustment, screen layout) corresponding to the information code is read, and video display is set (S26). Also, character data (for example, device name, output terminal name, video content name) corresponding to the device information code is read from the device information table 17 (S27), and then the character data and the character data “forced display mode” are read. Then, OSD processing for superimposing them on the video is performed (S28). Therefore, the display unit 13 displays the video content from the video output device in which the display command code is detected and the character data corresponding to the device information code.

  With respect to the analog signal in which the display command information is detected by the above processing, the user's operation of selecting the channel is saved, and the channel is automatically selected and the analog video signal is displayed (hereinafter, such an analog signal is displayed). A state in which a channel is selected by processing is referred to as a forced display mode). Therefore, the operation procedure for displaying the video content output from the video output device can be simplified, and mistakes in channel selection of the video display device by a user with low proficiency can be eliminated.

  In the forced display mode, when a specific user operation related to channel scanning is performed again, it is preferable to select an input terminal to which a display command code is newly input. Therefore, it is configured to store the input terminal in the forced display mode in the video processing unit or the control unit, and when a display command code is detected from another input terminal together with the input terminal in the forced display mode, a new display command is generated. It is preferable to reset the input terminal from which the code is detected to the forced display mode.

  In addition, when display command codes start to be detected simultaneously from a plurality of input terminals, either one of the input terminals may be set to the forced display mode. The channel setting may be maintained. This is because a user's operation (for example, simultaneous operation of DVD playback and game start, etc.) such that a display command code starts to be detected simultaneously from a plurality of input terminals is difficult to perform in general.

  Moreover, although the example which performs a channel scan by a user's specific operation was shown in the above-mentioned flow, the execution timing of a channel scan is not restricted to this, What timing may be sufficient. For example, it may be automatically executed every predetermined time. In this case, the display command code can be periodically output from the DVD player, and the time for the video display device to perform channel scanning can be made longer than the cycle in which the DVD player outputs.

  Further, the automatic execution timing of the channel scanning may be set when any analog video signal is input to any one of the input terminals. In that case, an analog video signal detection circuit may be provided for each input terminal.

  In addition, if a plurality of video processing circuits are provided and at least one of them is used for detecting display command information and channel scanning is always performed, a channel that promptly displays whatever display command information is input at any timing Can be changed.

  Next, when the analog video signal selected by detecting the display command information is interrupted, a processing flow in the case of selecting another analog video signal will be described with reference to FIG. The video processing unit 12 of the video display device 1 detects whether or not the current state is the forced display mode (S31). In the case of the forced display mode, the video content of the displayed channel is detected (S32). If no video content is detected, the display channel is changed to a preset channel (for example, an analog terrestrial broadcast channel), and the forced display mode is terminated (S33). When video content is detected, the forced display mode is maintained as it is. Therefore, even when the analog video signal is interrupted, such as at the end of playback, other video content can be quickly displayed without the need for a specific user operation.

It is a block diagram which shows schematic structure of the video display apparatus of embodiment and the video output apparatus connected. It is a figure which shows the 1st example of the processing flow of a video output device. It is a figure which shows the 2nd example of the processing flow of a video output device. It is a figure which shows the processing flow at the time of the display start of a video display apparatus. It is a figure which shows the processing flow at the time of the display end of a video display apparatus.

Explanation of symbols

1-Video display device 2-DVD player 3-Antennas 11A, 11B, 11C-Input terminal 12-Video processing unit 13-Display unit 14-Control unit 15-Remote control receiving unit 16-Operation unit 17-Device information table 18- Terminal selection unit 21A, 21B-Output terminal 22-Video processing unit 23-Servo controller 24-Control unit 25-Pickup 26-Disk drive motor

Claims (6)

A plurality of input terminals to which an analog video signal is input, a terminal selection unit for selecting one of the input terminals, and a video processing unit for displaying on the display a video based on the analog video signal of the input terminal selected by the terminal selection unit In a video display device having
Display command detection means for detecting display command information from the LINE21 data of the analog video signal, and device information of the output device that has output the analog video signal is detected from the LINE21 data of the analog video signal from which the display command information has been detected. Device information detection means, and display mode storage means for storing in advance a display mode set for each of the device information,
The terminal selection unit selects an input terminal from which display command information is detected by the display command detection means,
The video processing unit detects the display command information from a character corresponding to the display command information detected by the display command detection unit and a character corresponding to the device information detected by the device information detection unit. The synthesized video superimposed on the video based on the analog video signal is displayed on the display in the display mode stored in the display mode storage means,
The terminal selection unit is a video display device that switches the selection to another input terminal when the input of the analog video signal at the input terminal where the display command information is detected is interrupted. A plurality of input terminals to which an analog video signal is input, a terminal selection unit for selecting one of the input terminals, and a video processing unit for displaying on the display a video based on the analog video signal of the input terminal selected by the terminal selection unit In a video display device having
A video display device having display command detection means for detecting display command information from LINE21 data of the analog video signal, wherein the terminal selection unit selects an input terminal for which display command information is detected by the display command detection means.   The video display device according to claim 2, wherein the terminal selection unit switches the selection to another input terminal when the input of the analog video signal at the input terminal where the display command information is detected is interrupted.   4. The video display according to claim 2, wherein the video processing unit displays on the display a composite video in which a character corresponding to the display command information is superimposed on a video based on an analog video signal from which the display command information is detected. apparatus. Device information detection means for detecting device information of an output device that has output the analog video signal from LINE21 data of the analog video signal from which the display command information has been detected;
The video processing unit displays on the display a composite video in which a character corresponding to the device information detected by the device information detection unit is superimposed on a video based on an analog video signal from which the display command information is detected. The video display apparatus in any one of -4. Display mode storage means for storing in advance a display mode set for each device information;
The video display device according to claim 5, wherein the video processing unit displays a video based on the analog video signal in the display mode corresponding to the detected device information.

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