JP2011166315A - Display device, method of controlling the same, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device that automatically changes picture quality in accordance with the scene of a video and displays the video. <P>SOLUTION: A television receiver 10 includes: a picture quality adjustment section 112 which adjusts the picture quality of the video and makes a display unit 111 display the adjusted video; a storage section 113 which previously stores correspondence information on statistics of a signal of the video and setting values for the picture quality adjustment section 112 to adjust the picture quality; a statistics acquisition section 114 which acquires statistics from the signal of the video that the display section 111 displays; and an adjustment instruction section 115 which acquires setting values corresponding to the statistics that the statistic acquisition section 114 acquires from the correspondence information in the storage section 113 and instructs the picture quality adjustment section 112 to adjust the picture quality with the acquired setting values. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device that automatically changes and displays the image quality according to a video scene, a display device control method, a program, and a computer-readable recording medium on which the program is recorded.

  In the display device, a technique for changing the image quality setting according to the content or the use environment has been proposed in order to realize a good image quality. For example, Patent Documents 1 to 3 have been reported as techniques for correcting image quality in accordance with user preferences and the like during program playback.

  Patent Document 1 describes an image quality display device that determines an image quality parameter by presenting a plurality of sample images having different image quality parameters and allowing a user to select a desired sample image.

  Patent Document 2 describes a television receiver that determines the image quality by allowing a user to select sample moving images having different image qualities.

  In Patent Document 3, characteristics such as topic and theme information for a program currently being broadcast on television are determined, and data such as audio and video setting values are stored in a storage unit in a pre-defined optimum image. A system that conforms to the table of machine characteristics is described.

JP 2007-147828 A (released on June 14, 2007) JP 2001-119644 A (published on April 27, 2001) JP 2001-515675 A (published September 18, 2001)

  By the way, the user's preference for image quality often differs depending on the genre or the like of the program to be viewed, and even within the genre, the preferred image quality may differ for each scene. For example, when watching a sports program, a soccer scene may prefer a darker display than a baseball scene. In the techniques of Patent Documents 1 to 3, the image quality is not adjusted according to the user's preference for each scene of a program to be viewed.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display device capable of automatically changing and displaying an image according to a video scene.

In order to solve the above problems, a display device according to the present invention provides
A display device comprising a display unit for displaying video,
An image quality adjustment unit that adjusts the image quality of the image and displays the adjusted image on the display unit;
A storage unit that prestores correspondence information between a statistical value of the video signal and a setting value for the image quality adjustment unit to adjust the image quality;
A statistical value acquisition means for acquiring the statistical value from a video signal to be displayed by the display unit;
An adjustment instruction unit that acquires the setting value corresponding to the statistical value acquired by the statistical value acquisition unit from the correspondence information of the storage unit and instructs the image quality adjustment unit to adjust the image quality with the acquired setting value It is characterized by comprising.

In order to solve the above problems, a display device control method according to the present invention provides:
A display device control method comprising: a display unit that displays a video; and an image quality adjustment unit that adjusts the image quality of the video and displays the adjusted video on the display unit,
A statistical value acquisition step of acquiring a statistical value of a video signal to be displayed by the display unit;
The statistical value acquired in the statistical value acquisition step with reference to the storage unit storing the correspondence information between the statistical value of the video signal and the setting value for the image quality adjustment unit to adjust the image quality And an adjustment instruction step for instructing the image quality adjustment unit to adjust the image quality with the acquired setting value.

  By the way, in a sports program, for example, in a swimming scene, since there are many video parts of water, the ratio of blue is large and the overall luminance value is relatively low. Further, in a soccer scene, since there are many lawn image parts, the ratio of green is large and the overall luminance value is relatively high. In a marathon scene, there are many video parts of public roads during the day, so the proportion of gray is large and the overall luminance value is near the middle. From this, the video scene is expected to differ depending on the statistical values of various video signals such as luminance signals, color signals, and RGB signals.

  Therefore, according to the configuration of the present invention, when displaying a video on the display unit, the statistical value of the video signal is acquired from the video signal to be displayed, and the set value corresponding to the acquired statistical value is used. An image with adjusted image quality is displayed. Thus, the image quality can be automatically changed and displayed according to the video scene.

  The statistical value of the video signal includes, for example, a value obtained by statistically averaging the average value of the video luminance signal.

  Further, the setting value in the correspondence information may be one or plural. Further, the set value may be a value set by the user, for example. For example, when adjusting the image quality of the video, if the image quality can be adjusted with the setting value set by the user, the video adjusted to the image quality suitable for the user's preference can be displayed.

In the display device according to the present invention,
A reception unit for receiving instructions from the user;
Registration means for registering the correspondence information in the storage unit;
The registration means instructs the image quality adjustment unit to adjust the image quality with a setting value based on an instruction from the user, determines the setting value based on the instruction from the user, Preferably, correspondence information with the statistical value acquired by the statistical value acquisition means is stored in the storage unit.

  For example, in a sports program, a user often wants to make adjustments so that the skin is displayed in a more vivid color because the image of human skin is frequently displayed in a swimming scene. Therefore, according to the above-described configuration of the present invention, the user can give an instruction to adjust the video to a desired image quality, so that the video adjusted to the desired image quality can be viewed.

  When receiving an instruction from the user, the registration unit determines a setting value based on the instruction, and stores correspondence information between the determined setting value and the statistical value in the storage unit. That is, the setting value adjusted to the user's preference is stored in the storage unit as correspondence information with the statistical value of the video signal at the time of adjustment. Thus, when a new video is displayed, it is possible to automatically display a video that has been adjusted to the image quality according to the user's preference without the user's adjustment each time.

In the display device according to the present invention,
It is preferable that the registration unit stores the reduced image of the video targeted for acquisition by the statistical value acquisition unit in the storage unit in association with the correspondence information.

  According to the above configuration, since the reduced image of the video targeted for acquisition by the statistical value acquisition means is stored in association with the correspondence information, when displaying the video targeted for acquisition on the display unit, a plurality of videos are displayed. If stored, a list of reduced images can be displayed. That is, when the user confirms the video to be acquired by the statistical value acquisition means, the user can improve the convenience for the user because the reduced images can be displayed in a list instead of one by one. .

In the display device according to the present invention,
The registration unit reads the correspondence information and the reduced image selected based on the instruction from the user from the storage unit, and adjusts the image quality so that the read reduced image is adjusted with the set value of the read correspondence information. It is preferable to instruct the adjustment unit.

  According to the above configuration, when the user inputs an instruction to adjust the image quality of the video targeted for acquisition by the statistical value acquisition unit to the display device, a reduced image of the video is displayed on the display unit. The user can quickly find the desired image.

  In addition, the registration unit instructs the image quality adjustment unit to adjust the image quality of the reduced image selected by the user with the setting value of the selected correspondence information, so that the image quality of the video adjusted in the past can be edited. it can.

In the display device according to the present invention,
The storage unit stores the correspondence information for each genre of the video,
Genre acquisition means for acquiring information on the genre of the video to be displayed by the display unit;
The adjustment instruction unit acquires the set value corresponding to the genre acquired by the genre acquisition unit and the statistical value acquired by the statistical value acquisition unit from the correspondence information in the storage unit, and uses the acquired setting value. It is preferable to instruct the image quality adjustment unit to adjust the image quality.

  According to the above configuration, when the adjustment instruction unit instructs the image quality adjustment unit to adjust the image quality, the adjustment instruction unit instructs to adjust the setting value acquired from the correspondence information stored for each video genre. Thereby, an image can be displayed with an image quality corresponding to the user's preference for each genre.

  In the display device according to the present invention, it is preferable that the statistical value is a cumulative frequency of the luminance signal of the video that is equal to or less than a threshold value. For example, when adjusting the image quality of a dark scene image, it is possible to display an image without gradation loss even in a dark scene by adjusting the image quality with a setting value corresponding to the cumulative frequency of the luminance signal of the image.

  The display device may be realized by a computer. In this case, a program for realizing the display device in the computer by operating the computer as each of the above-described means and a computer-readable recording medium recording the program also fall within the scope of the present invention.

  As described above, the display device according to the present invention is a display device including a display unit that displays an image, and adjusts the image quality of the image, and displays the adjusted image on the display unit. A storage unit that prestores correspondence information between a statistical value of the video signal and a setting value for the image quality adjustment unit to adjust the image quality, and the statistical value from the video signal to be displayed by the display unit The statistical value acquisition means for acquiring the setting value corresponding to the statistical value acquired by the statistical value acquisition means from the correspondence information of the storage unit, and adjusting the image quality with the acquired setting value Since the image forming apparatus includes adjustment instruction means for instructing the image quality adjustment unit, the image quality can be automatically changed and displayed according to the scene of the video.

It is a block diagram which shows the principal part structure of one Embodiment of the display apparatus which concerns on this invention. 1 is a block diagram illustrating an overall configuration of an embodiment of a display device according to the present invention. It is a flowchart which shows the flow of a process of image quality adjustment in one Embodiment of the display apparatus which concerns on this invention. FIG. 4A shows an embodiment of the present invention, FIG. 4A shows an initial value of image quality associated with a sports program, and FIGS. 4B and 4C show image quality. It is a graph which shows the relationship between a setting value and a statistical value. FIG. 5A shows an embodiment of the present invention, and FIG. 5A is a diagram showing setting values of image quality when displaying an image of a “swimming” scene, and FIGS. c) is a graph showing a relationship between a set value of image quality and a statistical value. FIG. 6A shows an embodiment of the present invention, and FIG. 6A is a diagram showing set values of image quality when displaying a video of a “soccer” scene, and FIGS. c) is a graph showing a relationship between a set value of image quality and a statistical value. FIG. 7A illustrates an embodiment of the present invention, and FIG. 7A is a diagram illustrating setting values of image quality when displaying a video of a “marathon” scene, and FIGS. c) is a graph showing a relationship between a set value of image quality and a statistical value. FIG. 8A shows an embodiment of the present invention, and FIG. 8A is a diagram showing setting values of image quality when displaying a video of a “baseball” scene, and FIGS. c) is a graph showing a relationship between a set value of image quality and a statistical value. It is a figure which shows the place which used the histogram as one example of a statistical value in one Embodiment of the display apparatus which concerns on this invention. It is a flowchart which shows the flow of automatic image quality adjustment in one Embodiment of the display apparatus which concerns on this invention. It is a figure which shows an example of the corresponding information recorded on the memory | storage part in one Embodiment of the display apparatus which concerns on this invention. It is a figure which shows the example of a display of the screen which selects favorite image quality for every genre. It is a figure which shows the setting value of the image quality for every genre selected on the screen shown in FIG. It is a flowchart which shows the flow of a process of the re-editing function in one Embodiment of the display apparatus which concerns on this invention. FIG. 10 is a diagram showing a display example of a screen when the user re-edits the image quality in the embodiment of the display device according to the present invention.

  An embodiment of a display device according to the present invention will be described below with reference to FIGS. In the following description, various preferred limits are given to implement the present invention, but the technical scope of the present invention is not limited to the description of the following embodiments and drawings.

(Outline of the television receiver 10)
First, the outline of the configuration of a television receiver including the display device according to the present invention will be described with reference to FIG. FIG. 2 is a block diagram schematically showing the configuration of the television receiver 10.

  In FIG. 2, the television receiver 10 (display device) includes, for example, a display 22 (display unit) having a screen size of 16: 9 (1920 × 1010 dots). The television receiver 10 includes a CPU 6 and a memory 7 connected to the bus 8, and the operation of the television receiver 10 is controlled by various control programs recorded in the CPU 6 and the memory 7. That is, the television receiver 10 of this embodiment is controlled by a computer system including a CPU 6, and a program for operating the television receiver 10 by a computer is recorded in the memory 7.

  The television receiver 10 includes a digital tuner unit 14 and an analog tuner unit 12, and can receive both digital broadcasting and analog broadcasting. The external input unit 31 can be connected to a solid-state memory such as an HDD or SD card, a disk device such as a BD (Blu-ray disc), DVD or CD, and various external devices 30. A BD / DVD / CD recording / reproducing unit 32 is also built in the main body. In addition, an IP broadcast tuner unit 23 is provided to receive IP broadcasts.

  In addition, the television receiver 10 includes an AV switch unit 13, a digital demodulation unit 15, a separation unit (DMUX) 16, a video decode / capture unit 17, a video selector unit 18, a video processing unit 19 (video processing means), an addition Circuit 20, display control unit 21, display 22 (display unit), EPG / OSD / reservation processing unit 24, audio decoding unit 25, audio selector unit 26, audio output conversion unit 27, speaker 28, channel selection unit 33, communication control unit 34, a remote control light receiving unit 35 and an OPC sensor 38 are provided.

(Configuration of main part of the television receiver 10)
Next, the configuration of the main part of the television receiver 10 will be described with reference to FIG. FIG. 1 is a block diagram showing a main configuration of the television receiver 10.

  In FIG. 1, an image quality control unit 100 is provided in the television receiver 10 and adjusts the image quality of an image displayed on the display unit 111. The image quality control unit 100 includes an image quality adjustment unit 112, a storage unit 113, a statistical value acquisition unit 114 (statistical value acquisition unit), an adjustment instruction unit 115 (adjustment instruction unit), a registration unit 116 (registration unit), and a genre acquisition unit 117 ( Genre acquisition means).

  The image quality control unit 100 corrects the image quality of the video displayed on the display unit 111. Specifically, the statistical value of the signal is acquired from the video signal to be displayed by the display unit 111, and the image quality is adjusted by the setting value associated with the statistical value to adjust the image quality. The displayed video is displayed on the display unit 111.

  By the way, in a sports program, for example, in a swimming scene, since there are many video parts of water, the ratio of blue is large and the overall luminance value is relatively low. Further, in a soccer scene, since there are many lawn image parts, the ratio of green is large and the overall luminance value is relatively high. In a marathon scene, there are many video parts of public roads during the day, so the proportion of gray is large and the overall luminance value is near the middle. From this, the video scene is expected to differ depending on the statistical values of various video signals such as luminance signals, color signals, and RGB signals.

  Therefore, according to the above configuration of the present invention, when displaying a video on the display unit 111, a statistical value of the video signal is acquired from the video signal to be displayed, and a setting value corresponding to the acquired statistical value The image with the image quality adjusted by is displayed. Thus, the image quality can be automatically changed and displayed according to the video scene.

  The statistical value of the video signal includes, for example, a value obtained by statistically averaging the average value of the video luminance signal. The statistical value may be a cumulative frequency of the luminance signal of the video that is equal to or less than a threshold value. For example, when adjusting the image quality of a dark scene image, it is possible to display an image without gradation loss even in a dark scene by adjusting the image quality with a setting value corresponding to the cumulative frequency of the luminance signal of the image. In addition, as setting values, for example, values of various image quality setting parameters such as “white level”, “color (color density)”, “black level”, “tint (hue)”, “backlight”, etc. Is included.

  The image quality adjustment unit 112 adjusts the image quality of the video received from the communication unit 118 and outputs the adjusted video to the display unit 111. At this time, the image quality adjustment unit 112 adjusts the image quality with the setting value instructed from the adjustment instruction unit 115. Note that when the image quality adjustment unit 112 adjusts the image quality of a video, for example, a still image of a scene may be acquired from the video and the adjustment may be performed using the still image. Details of the image quality adjustment by the image quality adjustment unit 112 will be described later. The communication unit 118 includes various blocks for receiving video such as the digital tuner unit 14, the analog tuner unit 12, or the IP broadcast tuner unit 23 described above.

  A storage unit 113 (also referred to as a memory) stores correspondence information between a statistical value of a video signal and a setting value used by the image quality adjustment unit 112 to adjust the image quality. Specifically, the statistical value acquired by the statistical value acquisition unit 114 and the set value are associated with each other and stored as correspondence information. Note that the storage unit 113 may store one set value or a plurality of set values. Further, the set value may be a value set by the user. For example, when adjusting the image quality of the video, if the image quality can be adjusted with the setting value set by the user, the video adjusted to the image quality suitable for the user's preference can be displayed.

  The statistical value acquisition unit 114 acquires a statistical value from the video signal to be displayed by the display unit 111 and sends the statistical value to the storage unit 113.

  The adjustment instruction unit 115 acquires the setting value corresponding to the statistical value acquired by the statistical value acquisition unit 114 from the correspondence information in the storage unit 113 and instructs the image quality adjustment unit 112 to adjust the image quality with the acquired setting value. To do.

  The registration unit 116 registers the correspondence information in the storage unit 113. Specifically, the registration unit 116 first instructs the image quality adjustment unit 112 to adjust the image quality with the set value based on the instruction from the user received by the remote control light receiving unit 119 (accepting unit), and the instruction from the user. The set value is determined based on the above. Then, the correspondence information between the determined setting value and the statistical value acquired by the statistical value acquisition unit 114 is stored in the storage unit 113.

  Note that the registration unit 116 preferably stores the reduced image of the video acquired by the statistical value acquisition unit 114 in the storage unit 113 in association with the correspondence information. As a result, when a plurality of videos are stored when displaying the video to be acquired on the display unit 111, a list of reduced images can be displayed. In other words, when the user confirms the video to be acquired by the statistical value acquisition unit 114, the user can check the list of reduced images instead of one by one, thereby improving the convenience for the user. it can.

  In addition, the registration unit 116 reads the correspondence information and the reduced image selected based on the instruction from the user from the storage unit 113, and adjusts the image quality of the read reduced image by adjusting the image quality with the setting value of the read correspondence information. It is preferable to instruct the unit 112. As a result, when the user inputs an instruction to adjust the image quality of the image targeted for acquisition by the statistical value acquisition unit 114 to the television receiver 10, a reduced image of the image is displayed on the display unit 111. The user can quickly find the desired image. Furthermore, the registration unit 116 instructs the image quality adjustment unit 112 to adjust the image quality of the reduced image selected by the user with the setting value of the selected correspondence information, and thus edits the image quality of the video adjusted in the past. be able to.

  The genre acquisition unit 117 acquires information on the genre of the video to be displayed by the display unit 111. Specifically, the genre acquisition unit 117 determines and acquires information on the genre of the video from the communication unit 118 that has received the video.

  For example, in digital broadcasting, genre information is classified and associated with major classification and middle classification. The major classification includes, for example, “news / report”, “information / wide show”, “variety”, “movie”, “sports”, and the like. As the middle category, for example, when the major category is “news / report”, there are “regular / comprehensive”, “local / region”, “weather” and the like. In general, a single broadcast program is associated with a plurality of large categories of genre information. For example, in the case of sports news, genre information of large categories “news / report” and “sports” is associated, and further, some genre information of medium categories belonging to these are associated. When the communication unit 118 receives a video in which these genres are associated, the genre acquisition unit 117 acquires information on the genre associated with the video. Here, the genre information to be acquired may be a part or all of the genre information associated with the video. Further, the genre acquisition unit 117 can determine, for example, whether or not it is derived from a film from the frame frequency of the video as described later.

  In the present embodiment, the case where the video received by the television receiver 10 is a digital broadcast will be described, but the same processing can be performed for an analog broadcast. That is, in the case of analog broadcasting, it is possible to acquire genre information by extracting a keyword representing the type of program as genre information by performing audio analysis and image analysis.

  The storage unit 113 stores correspondence information for each video genre, and the adjustment instruction unit 115 sets setting values corresponding to the genre acquired by the genre acquisition unit 117 and the statistical value acquired by the statistical value acquisition unit 114. It is preferable that the image quality adjustment unit 112 is instructed to adjust the image quality with the acquired setting value, obtained from the correspondence information in the storage unit 113. Thus, when the adjustment instruction unit 115 instructs the image quality adjustment unit 112 to adjust the image quality, the adjustment instruction unit 115 instructs the adjustment to be performed with the setting value acquired from the correspondence information stored for each video genre. Thereby, an image can be displayed with an image quality corresponding to the user's preference for each genre.

  Note that the display unit 111 may be a display 22 such as a liquid crystal display panel built in the television receiver 10 as shown in FIG. 1, or is separate from the display device. Also good. For example, a desktop computer using an external display as the display unit 111 is also included in the technical category of the present invention.

(Details of the television receiver 10)
Next, the function of each block provided in the television receiver 10 will be described below.

  As described above, the CPU 6 controls various operations of the television receiver 10.

  The memory 7 records an OS or various control software for operating the CPU 6, data related to program information such as electronic program guide (EPG) data received via broadcast waves, and OSD (ON -Screen display: OSD image data necessary for display is recorded. The memory 7 is usually constituted by a RAM, but may include a ROM in part, and has a work area that functions as a work memory necessary for various control operations.

  The analog tuner unit 12 selects an analog television broadcast signal received through the antenna 11 for receiving an analog broadcast, and performs channel selection according to a channel selection instruction from the channel selection unit 33. The received signal from the analog tuner unit 12 is separated into an audio signal and a video signal in the AV switch unit 13, the video signal is input to the video selector unit 18, and the audio signal is input to the audio selector unit 26.

  The digital tuner unit 14 selects a digital television broadcast signal received via the digital broadcast receiving antenna 40, and selects a channel to be received in response to a channel selection instruction from the channel selection unit 33. The received signal from the digital tuner unit 14 is demodulated by the digital demodulation unit 15 and sent to the separation unit (DMUX) 16.

  The IP broadcast tuner unit 23 selects an IP broadcast received via a communication control unit 34 connected to a telephone line / LAN or the like, and receives a specific IP received in response to a channel selection instruction from the channel selection unit 33. The broadcast is selected and the output is sent to the separation unit (DMUX) 16.

  The separation unit (DMUX) 16 separates the multiplexed video data and audio data input from the digital demodulation unit 15 or the IP broadcast tuner unit 23, sends the video data to the video decoding / capture unit 17, and the audio data Is sent to the audio decoding unit 25. Further, the separation unit (DMUX) 16 extracts data such as EPG data included in the broadcast signal and sends it to the EPG / OSD / reservation processing unit 24. The broadcast wave signal extracted by the separation unit (DMUX) 16 is recorded in the memory 7 by writing control by the CPU 6 as necessary.

  The video decoding / capture unit 17 decodes the video data separated by the separation unit (DMUX) 16 and captures video information included in the video data as a still image. The video signal decoded by the video decode / capture unit 17 is sent to the video selector unit 18. As described above, the video signal from the analog tuner unit 12 is input to the video selector unit 18, and the video signal from the external input unit 31 is also input. The video selector unit 18 selects and outputs one video signal from these input video signals according to the control signal from the CPU 6, and sends it to the video processing unit 19.

  The video processing unit 19 performs video processing such as noise reduction processing, sharpness adjustment, contrast adjustment, and the like on the input video signal so that the video signal is optimal for the display 22. Convert the data.

  The display control unit 21 includes a drive circuit for displaying the received video data on the display 22, and is added by the addition circuit 20, the electronic program guide data from the EPG / OSD / reservation processing unit 24, or The OSD data is sent to the display 22 in addition to the video data from the video processing unit 19. The display 22 displays the transmitted video data on the screen.

  The EPG / OSD / reservation processing unit 24 creates an electronic program guide based on EPG data periodically updated and stored, and draws OSD data stored in the memory 7 in advance. The OSD data is data for drawing various information such as a setting menu screen, a volume cage, a current time, a channel selection, and the like stored in advance in the memory 7. The EPG / OSD / reservation processing unit 24 performs program reservation processing using the electronic program guide.

  The audio decoding unit 25 decodes the audio data separated by the separation unit (DMUX) 16. The audio decoding unit 25 sends the decoded audio signal to the audio selector unit 26.

  The audio selector unit 26 receives the audio signal from the AV switch unit 13, the audio signal from the external input unit 31, and the audio signal from the audio decoding unit 25, and is selected by the video selector unit 18 under the control of the CPU 6. An audio signal corresponding to the video signal is selected, and the audio signal is sent to the speaker 28 via the audio output conversion unit 27. The audio output conversion unit 27 converts the received audio signal into a signal optimal for reproduction on the speaker 28 and supplies the converted signal to the speaker 28.

  The communication control unit 34 performs control to establish communication via a network such as a telephone line, a LAN, and the Internet.

  The remote controller light receiving unit 35 receives an optical signal from a remote controller 36 (hereinafter referred to as a remote controller 36) and receives a control signal from the remote controller 36. Various instructions from the user are made through the remote controller 36.

  The OPC sensor 38 is a sensor for detecting ambient brightness. The OPC sensor 38 is more preferably an illuminance sensor including a low pass filter. Thereby, temporary changes, such as a person passing in front of a sensor, can be relieved and illumination intensity can be acquired smoothly.

(Flow of image quality adjustment)
Next, details of image quality adjustment in the television receiver 10 according to the present embodiment will be described below based on the configuration shown in FIG. FIG. 3 is a flowchart showing the flow of image quality adjustment processing in the television receiver 10. In the embodiment described below, an example in which the image quality of a scene in which a user is watching a sports program is set and the image quality is adjusted based on the setting will be described. However, the present invention is not limited to this. Instead, the set value may be stored in advance in the storage unit 113 in association with the statistical value.

  First, when the user presses a predetermined button provided on the remote controller 36 or the television receiver 10 while viewing the video displayed on the display unit 111, the television receiver 10 displays a menu screen for adjusting the image quality. Display (step S1). Note that the menu screen may be displayed on a part of the display unit 111, for example, and it is preferable that at least a part of the currently viewed video can be confirmed. Here, when the user presses a predetermined button (for example, a determination key) provided on the remote controller 36 to adjust the image quality of a certain scene (step S2), a still image of the certain scene is captured (step S3). ). As a result, the image quality adjustment by the user can be accepted.

  In this state, when the remote control light receiving unit 119 receives an instruction from the user, the registration unit 116 instructs the image quality adjustment unit 112 to adjust the image quality with the setting value based on the instruction, and the image quality adjustment unit 112 is based on the instruction. The image quality is adjusted (step S4). Here, the instruction of the set value by the user is adjusted by, for example, displaying an adjustment bar for adjusting the image quality parameter on the display unit 111 and sending an instruction for the user to adjust each parameter via the remote controller 36. The received value may be accepted as the set value.

  By the way, as described above, when the storage unit 113 stores the correspondence information for each video genre, the displayed video is displayed by the genre of “sports” and the statistical value acquisition unit 114 as shown in FIG. The image quality is adjusted to a setting value corresponding to the acquired statistical value of the video. FIG. 4 shows an embodiment of the present invention. FIG. 4 (a) is a diagram showing initial values of image quality associated with a sports program, and FIGS. 4 (b) and 4 (c). These are graphs showing the relationship between image quality setting values and statistical values. Note that the average luminance is used as the statistical value of the video signal.

  Here, for example, when an instruction to adjust the “color” parameter in the video of the “swimming” scene is received from the user, setting values determined based on the instruction are shown in FIG. FIG. 5 shows an embodiment of the present invention. FIG. 5A is a diagram showing set values of image quality when displaying a video of a “swimming” scene. b) and (c) are graphs showing the relationship between the set value of image quality and the statistical value.

  As shown in FIG. 5A, the setting value of the “swimming” scene having an average luminance of 42% is changed from “+10” to “+12”. In this case, the correspondence between the average luminance (statistical value) and “color” (set value) is plotted as the intersection of X = 42 and Y = 12, as shown in (c) of FIG. A line that passes through As a result, the image quality of the “swimming” scene in which human skin is often displayed is adjusted so that the color of the human skin is displayed more vividly.

  Thereafter, when the user presses a predetermined button (for example, an end key) provided on the remote control 36 and the remote control light receiving unit 119 receives a control signal indicating that the adjustment is completed, the registration unit 116 displays the display unit 111. A screen asking the user whether to save the set value is displayed, and an instruction is received as to whether to save the set value (step S5).

  Here, when an instruction to save the setting value is received (Yes in step S5), the correspondence information between the setting value and the statistical value of the video signal acquired by the statistical value acquisition unit 114 is stored in the storage unit ( (Memory) 113 (step S6), and the screen returns to the video viewing screen (step S7).

  At this time, it is preferable that the registration unit 116 stores the reduced image of the video acquired by the statistical value acquisition unit 114 in the storage unit 113 in association with the correspondence information. As a result, when a plurality of videos are stored when displaying the video to be acquired on the display unit 111, a list of reduced images can be displayed. On the other hand, when an instruction not to save the setting value is received (No in step S5), the setting value is not saved and the screen returns to the video viewing screen (step S7).

  When returning to the viewing screen, the image quality adjustment unit 112 performs automatic image quality adjustment (step S8). That is, the statistical value acquisition unit 114 acquires the statistical value of the received video signal, and the setting value corresponding to this statistical value (for example, the average luminance acquired in the “swimming” scene) is the correspondence information in the storage unit 113. If there is, the image quality adjustment unit 112 adjusts the image quality with the set value based on an instruction from the adjustment instruction unit 115. Thus, the image quality can be automatically changed and displayed according to the video scene.

  Note that the setting value stored in the storage unit 113 may be one or plural. That is, the above-described image quality setting process by the user may be performed a plurality of times.

  For example, when an instruction for adjusting the parameters of “white level” and “color” is received from the user in the video of the “soccer” scene, values determined based on the instructions are shown in FIG. FIG. 6 shows an embodiment of the present invention. FIG. 6A is a diagram showing set values of image quality when displaying a video of a “soccer” scene. b) and (c) are graphs showing the relationship between the set value of image quality and the statistical value.

  As shown in FIG. 6A, the setting value of the “soccer” scene having an average luminance of 74% is changed to the parameter value of “color” by changing the parameter value of “white level” to “+28”. Has been changed to “+14”. In this case, the correspondence between the average luminance (statistical value) and the “white level” (set value) is plotted as the intersection of X = 74 and Y = 30 as shown in FIG. It becomes a polygonal line that passes through the intersection. The correspondence between the average luminance (statistical value) and “color” (set value) is plotted as the intersection of X = 74 and Y = 14 as shown in FIG. Further increase.

  In addition, when an instruction to adjust the parameters of “white level” and “color” is received from the user in the “marathon” scene video, the values determined based on the instructions are shown in FIG. FIG. 7 shows an embodiment of the present invention. FIG. 7A is a diagram showing set values of image quality when displaying a video of a “marathon” scene. b) and (c) are graphs showing the relationship between the set value of image quality and the statistical value.

  As shown in FIG. 7A, the setting value of the “marathon” scene having an average luminance of 53% is changed to the parameter value of “color” by changing the parameter value of “white level” to “+31”. Is changed to “+11”. In this case, the correspondence between the average luminance (statistical value) and the “white level” (set value) is plotted as the intersection of X = 53 and Y = 31, as shown in FIG. It becomes a polygonal line that passes through the intersection. Further, the correspondence between the average luminance (statistical value) and “color” (set value) is such that the intersection of X = 53 and Y = 11 is plotted as shown in FIG. Further increase.

  Further, FIG. 8 shows values determined based on the instructions when adjusting the “white level” and “color” parameters in the video of the “baseball” scene from the user. FIG. 8 shows an embodiment of the present invention. FIG. 8A is a diagram showing set values of image quality when displaying a video of a “baseball” scene. b) and (c) are graphs showing the relationship between the set value of image quality and the statistical value.

  As shown in FIG. 8A, the setting value of the “baseball” scene having an average luminance of 36% is changed to the parameter value of “color” by changing the parameter value of “white level” to “+32”. Has been changed to “+9”. In this case, the correspondence between the average luminance (statistical value) and the “white level” (set value) is plotted as the intersection of X = 36 and Y = 32 as shown in FIG. It becomes a polygonal line that passes through the intersection. Further, the correspondence between the average luminance (statistical value) and “color” (set value) is such that the intersection of X = 36 and Y = 9 is plotted as shown in FIG. Further increase.

  By storing these setting values in the storage unit 113, the image quality can be automatically changed and displayed according to various scenes of the video.

  In the above image quality adjustment, the case where the genre associated with the video is “sports” has been described as an example. However, the present invention is not limited to this. For example, various types such as “video” and “film” are available. Similarly, the image quality can be adjusted according to the scene in the genre. The image quality parameter to be adjusted is not limited to “white level” or “color”. The acquired statistical value is not limited to the average luminance, and may be the cumulative frequency of the luminance signal of the video that is equal to or less than the threshold value.

  For example, as shown in FIG. 9, first, the relationship between the Y value indicating brightness and the number of pixels is graphed, and the cumulative frequency (histogram) is obtained from the number of pixels at each Y value. Next, the Y value 64/255 may be used as a threshold, and the correspondence information between the cumulative frequency of video luminance signals of 64 or less and the set value may be stored in the storage unit 113. FIG. 9 is a diagram showing a histogram used as an example of a statistical value in the television receiver 10 according to an embodiment. For example, when an instruction to adjust the “black level” parameter of a certain scene is received from the user, the statistical value of the scene, that is, the cumulative frequency of the luminance signal of the video that is 64 or less is acquired and corresponds to the cumulative frequency. The image quality of the image may be adjusted with the set value. Thus, for example, when adjusting the image quality of a dark scene image, by adjusting the image quality with a setting value corresponding to the cumulative frequency of the luminance signal of the image, it is possible to display an image without gradation loss even in a dark scene. Can do.

(Details of automatic image quality adjustment)
Here, the automatic image quality adjustment described in step S8 will be further described with reference to FIG. FIG. 10 is a flowchart showing a flow of automatic image quality adjustment in one embodiment of the television receiver 10.

  First, processing such as demodulation is performed on received signals received by various communication units 118 such as the digital tuner unit 14 or the external input unit 31 such as HDMI (steps S10 and S11), and video signals are selected (step S10). Step S12). The statistical value acquisition unit 114 acquires a statistical value such as average luminance (APL) or the cumulative frequency of the luminance signal from the selected video signal (step S13).

  Next, the adjustment instruction unit 115 acquires a setting value corresponding to the statistical value acquired by the statistical value acquisition unit 114 from the correspondence information in the storage unit 113 (step S14). Here, as the correspondence information, for example, as shown in FIG. 11, an adjustment table in which the value of APL (average luminance) and the value of “color” (setting value) are stored in association with each other is included. FIG. 11 is a diagram illustrating an example of correspondence information recorded in the storage unit 113 in the embodiment of the television receiver 10. In addition to the correspondence information, the storage unit 113 may store a reduced image of the video that is acquired by the statistical value acquisition unit 114 in association with the correspondence information.

  Then, the adjustment instruction unit 115 instructs the image quality adjustment unit 112 to adjust the image quality with the setting value acquired from the storage unit 113. The image quality adjustment unit 112 adjusts the image quality of the video based on this instruction (step S15). Note that the television receiver 10 can correct the image quality based on various video signals such as RGB signals in addition to the image quality adjustment based on the video luminance signal (step S16). Thereafter, for example, various data such as electronic program guide data or OSD data is controlled to be displayed in addition to the video (step S17) and displayed on the display unit 111 (step S18).

Thus, the image quality can be automatically changed and displayed according to the video scene.
The automatic image quality adjustment described above may be performed for each frame, for example, but is not limited thereto.

(Image quality adjustment according to genre)
As described above, the television receiver 10 includes the genre acquisition unit 117 that acquires information on the genre of the video, and can display the video after adjusting the image quality according to the genre. That is, by storing the correspondence information for each genre in the storage unit 113 in advance, when the statistical value acquisition unit 114 acquires the statistical value of the video signal, the image quality is set with the setting values corresponding to the genre and the statistical value. Can be adjusted.

  By the way, the method of setting the correspondence information for each genre is not particularly limited, but for example, a sample image adjusted to various image quality is created, the sample image is displayed on the display unit 111, and the user is displayed. The set value may be determined by receiving a selection instruction for selecting one image from a plurality of sample images.

  For example, as shown in FIG. 12, three sample images whose image quality is adjusted to different setting values for each genre of “sports”, “video”, and “film” are displayed, and are selected by the user. FIG. 12 is a diagram illustrating a display example of a screen for selecting a preferred image quality for each genre.

  Here, “sports” is a genre of video associated with genre information of sports. “Video” is a genre of video derived from normal broadcasting at 60 Hz. “Film” is derived from a film, and is a genre of video obtained by performing 3: 2 pull-down processing on video shot at 24 Hz. These are all determined by the genre acquisition unit 117.

  The sample images are adjusted to different image quality. For example, the sample image of the genre “sports” is processed from pattern 1 to pattern 3, the sample image of pattern 1 has a natural color image quality, and the sample image of pattern 2 views sports. The pattern 3 has a vivid image quality by adjusting the color, separation emphasis, and gamma (FIG. 12A). Three sample images processed in three patterns in this way are displayed for each genre, and the user selects which pattern is preferred for each genre. FIG. 13 shows an example of setting values of the pattern selected as a result. FIG. 13 is a diagram showing image quality information for each genre when a desired image quality is selected on the screen shown in FIG. This makes it possible to display a video that is more comfortable for the user. The genre set in this way and the correspondence information are associated with each other and stored in the storage unit 113.

  Note that the method of determining the image quality setting value for each genre is not limited to the above example, and the user adjusts itself for each genre in the same manner as the method for adjusting the image quality setting value for each scene described above. A parameter may be selected and set to be adjusted to an arbitrary value.

(Details of re-editing function)
In the television receiver 10 of this embodiment, after adjusting the image quality of a certain scene, the image quality of the certain scene can be adjusted again according to the user's preference. The re-editing function in the television receiver 10 will be described below with reference to FIG. FIG. 14 is a flowchart showing the flow of processing of the re-editing function in the embodiment of the television receiver 10 according to the present invention.

  First, when a video re-edit request is received from the user, a menu screen for adjusting the image quality is displayed on the display unit 111 (step S20). Here, when an instruction to select, for example, an item for accepting re-editing of image quality (in this case, an item of “preferred image quality learning function”) is received from the menu screen (step S21), it is shown in FIG. As described above, the re-edit screen 200 is displayed on the display unit 111. FIG. 15 is a diagram illustrating a display example of a screen when the image quality is further adjusted by the user in the embodiment of the television receiver 10.

  In FIG. 15A, the area 201 displays that the “sports” genre is selected, and a plurality of different scenes adjusted in the past in the “sports” genre are displayed as reduced images. Listed. That is, the video is displayed as a thumbnail image. When an instruction to select the image 202 of the scene 4 is received from the reduced images, for example, from the user (step S22), a screen 203 shown in FIG. 15B is displayed.

  In FIG. 15B, the selected scene is displayed in the area 204, and an image 205 obtained by reducing the scene is displayed. In addition, the area 206 displays scene information (statistical values) of the scene, and the area 207 displays the set value of the image quality of the image 205. Here, for example, when an instruction is received from the user to adjust the set value of “color”, the cursor is set to “color” on the screen 205 (area 208) (step S23).

  Subsequently, a screen asking the user whether or not to adjust the “color” of the video of the scene 4 is displayed (step S24). When an instruction to re-edit is received (Yes in step S24), the registration unit 116 The adjusted set value is associated with the statistical value and stored in the storage unit 113 (step S25). On the other hand, when an instruction not to re-edit is received (No in step S24), the selected scene 4 is not re-edited and the process returns to step S23. Thereafter, the screen returns to the video viewing screen (step S26), and automatic image quality adjustment is performed with the changed setting value (step S27).

  As described above, when the user inputs an instruction to adjust the image quality of the video that is acquired by the statistical value acquisition unit 114 to the television receiver 10, a reduced image of the video is displayed on the display unit 111. Therefore, the user can find a desired image immediately.

  In addition, the registration unit 116 instructs the image quality adjustment unit 112 to adjust the image quality of the reduced image selected by the user with the setting value of the selected correspondence information. be able to.

(Program and recording medium)
Finally, each unit included in the television receiver 10 may be configured by hardware logic. Alternatively, it may be realized by software using a CPU (Central Processing Unit) as follows.

  That is, the television receiver 10 includes a CPU that executes program instructions for realizing each function, a ROM (Read Only Memory) that stores the program, a RAM (Random Access Memory) that expands the program into an executable format, And a storage device (recording medium) such as a memory for storing the program and various data. With this configuration, the object of the present invention can be achieved by a predetermined recording medium.

  The recording medium only needs to record the program code (execution format program, intermediate code program, source program) of the program of the television receiver 10 which is software for realizing the above-described functions so as to be readable by the computer. This recording medium is supplied to the television receiver 10. Thereby, the television receiver 10 (or CPU or MPU) as a computer may read and execute the program code recorded on the supplied recording medium.

  The recording medium for supplying the program code to the television receiver 10 is not limited to a specific structure or type. That is, the recording medium includes, for example, a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. System, a card system such as an IC card (including a memory card) / optical card, or a semiconductor memory system such as a mask ROM / EPROM / EEPROM / flash ROM.

  Further, even if the television receiver 10 is configured to be connectable to a communication network, the object of the present invention can be achieved. In this case, the program code is supplied to the television receiver 10 via the communication network. The communication network may be any network that can supply program codes to the television receiver 10 and is not limited to a specific type or form. For example, it may be the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication network, and the like.

  The transmission medium constituting the communication network may be any medium that can transmit the program code, and is not limited to a specific configuration or type. For example, wired communication such as IEEE 1394, USB (Universal Serial Bus), power line carrier, cable TV line, telephone line, and ADSL (Asymmetric Digital Subscriber Line) line, infrared rays such as IrDA and remote control, Bluetooth (registered trademark), 802.11 It can also be used by radio such as radio, HDR, mobile phone network, satellite line, terrestrial digital network. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention can be suitably used as a display device such as a television receiver.

10 Television receiver (display device)
DESCRIPTION OF SYMBOLS 100 Image quality control part 111 Display part 112 Image quality adjustment part 113 Storage part 114 Statistical value acquisition part (Statistical value acquisition means)
115 Adjustment instruction section (adjustment instruction means)
116 Registration part (registration means)
117 Genre acquisition unit (genre acquisition means)

Claims (9)

A display device comprising a display unit for displaying video,
An image quality adjustment unit that adjusts the image quality of the image and displays the adjusted image on the display unit;
A storage unit that prestores correspondence information between a statistical value of the video signal and a setting value for the image quality adjustment unit to adjust the image quality;
A statistical value acquisition means for acquiring the statistical value from a video signal to be displayed by the display unit;
An adjustment instruction unit that acquires the setting value corresponding to the statistical value acquired by the statistical value acquisition unit from the correspondence information of the storage unit and instructs the image quality adjustment unit to adjust the image quality with the acquired setting value A display device comprising: A reception unit for receiving instructions from the user;
Registration means for registering the correspondence information in the storage unit;
The registration means instructs the image quality adjustment unit to adjust the image quality with a setting value based on an instruction from the user, determines the setting value based on the instruction from the user, The display device according to claim 1, wherein correspondence information with the statistical value acquired by the statistical value acquisition unit is stored in the storage unit.   The display device according to claim 2, wherein the registration unit stores a reduced image of the video targeted for acquisition by the statistical value acquisition unit in the storage unit in association with the correspondence information.   The registration unit reads the correspondence information and the reduced image selected based on the instruction from the user from the storage unit, and adjusts the image quality so that the read reduced image is adjusted with the set value of the read correspondence information. The display device according to claim 2, wherein an instruction is given to an adjustment unit. The storage unit stores the correspondence information for each genre of the video,
Genre acquisition means for acquiring information on the genre of the video to be displayed by the display unit;
The adjustment instruction unit acquires the set value corresponding to the genre acquired by the genre acquisition unit and the statistical value acquired by the statistical value acquisition unit from the correspondence information in the storage unit, and uses the acquired setting value. 5. The display device according to claim 1, wherein the image quality adjustment unit is instructed to adjust the image quality. 6.   The display device according to claim 1, wherein the statistical value is a cumulative frequency of the luminance signal of the video that is equal to or less than a threshold value. A display device control method comprising: a display unit that displays a video; and an image quality adjustment unit that adjusts the image quality of the video and displays the adjusted video on the display unit,
A statistical value acquisition step of acquiring a statistical value of a video signal to be displayed by the display unit;
The statistical value acquired in the statistical value acquisition step with reference to the storage unit storing the correspondence information between the statistical value of the video signal and the setting value for the image quality adjustment unit to adjust the image quality And a adjustment instruction step for instructing an image quality adjustment unit to adjust the image quality with the acquired setting value.   A program for operating a computer included in the display device according to any one of claims 1 to 6, wherein the program causes the computer to function as each unit.   A computer-readable recording medium on which the program according to claim 8 is recorded.

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