JP2009147669A - Video display device and video processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that an effective demonstration cannot be performed according to program content when a received program of television broadcasting is used as content of a demonstration mode. <P>SOLUTION: A video display device for displaying a video signal is provided with: a detecting part for detecting attribute information of the video signal; an image quality adjusting part for adjusting the image quality of the video signal; a displaying part for displaying the video signal in a display screen including a first area for displaying a video signal whose image quality is not adjusted by the image quality adjusting part and a second area for displaying a video signal whose image quality is adjusted or not adjusted by the image quality adjusting part; and a control part, wherein the control part is configured to use the attribute information detected by the detecting part and control the image quality adjusting part so as to adjust the image quality of the video signal to be displayed in the second area. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a video display apparatus that displays a video whose image quality has been adjusted in a predetermined area of a display screen including, for example, a first area and a second area.

  Conventionally, there has been known a video display device having a demo mode in which the image before and after the image quality adjustment is displayed on the same screen in order to appeal the effect of the image quality improvement function to the customer actively at the store or for the user to set the image quality adjustment. It has been. For example, Patent Document 1 describes a video display device that divides a display screen into left and right areas, displays an original video in the left area, and displays an image with adjusted image quality in the right area.

JP 2001-268475 A

  However, in Patent Document 1, images before and after image quality adjustment are displayed in parallel regardless of what kind of image the input image signal is. Therefore, depending on the content of the input video signal, there are cases where it is not suitable for comparing and displaying the state before and after the image quality adjustment. For example, even if motion adaptive frame rate conversion (to be described later), which is effective for film images (film sources such as cinema), is originally performed on an image with 60 frames per second, image quality adjustment Difficult to see the difference between before and after. Therefore, in such a case, it cannot be said that the effect of the image quality adjustment (motion adaptive frame rate conversion or the like) can be confirmed by the user, and the usability of the video display device is not sufficient.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a video display device with improved user-friendliness.

  In order to solve the above problems, a video display device according to the present invention includes a display unit that displays the video signal on a display screen including a first area and a second area, and detection that detects attribute information of the video signal. An image quality adjustment unit that adjusts the image quality of the video signal, and a control unit that controls the image quality adjustment unit, wherein the control unit is configured to control the second region based on attribute information detected by the detection unit. The image quality adjustment unit is controlled to adjust the image to be displayed on the screen.

  Since the video display device of the present invention is configured as described above, it is possible to appropriately perform image adjustment on an image suitable for image adjustment and display images before and after the image adjustment.

  As described above, according to the present invention, it is possible to provide a video display device with improved user convenience.

  Hereinafter, the best mode of the present invention will be described with reference to the drawings. In each figure, elements having common functions are denoted by the same reference numerals, and those that have been described once will not be described repeatedly.

  As a television broadcasting receiver currently on the market, as a high image quality function (image quality adjustment function) that performs a demonstration of displaying a high-quality video and a video before the high-quality video, for example, in parallel on the left and right of the same screen. For example, “smooth cinema” that smoothly depicts the motion of the telecine video described above, “double-speed display” that converts a frame rate of 60 frames / second to 120 frames / second, and interlace-progressive Conversion (hereinafter referred to as "IP conversion"). In the following, in the embodiment according to the present invention, a “smooth cinema” function (described later) will be described as an image quality enhancement function used in the demonstration mode. However, the present invention is not limited to this. For the sake of simplicity, it is assumed that the program video signal format received by the television broadcast receiver is interlaced.

  First, a problem when motion adaptive frame rate conversion is performed on a film video (film source such as a cinema) will be described.

  For convenience of explanation, first, the 2-3 pull-down telecine conversion will be described with reference to FIG. In FIG. 7, the field number is different from the actual field number and is a field number for convenience of explanation.

  On the broadcast station side, as shown in FIG. 7, for a film image (film source) having 24 frames per second, for example, the first field Ao (“o”) from the image A of the first frame A video for two fields, a subscript meaning an odd field) and a second field Ae ("e" is a subscript meaning an even field), is generated from the video B of the second frame to the third field Bo, fourth. The video for the three fields of the field Be and the fifth field Bo is generated, and the video for the second field of the sixth field Ce and the seventh field Co from the video C of the third frame to the fourth frame in the same manner. 24 Hz (2 (Frame / second) film image signal is converted to 60 Hz (60 fields / second, 30 frames / second) (this conversion is called 2-3 pull-down telecine conversion, hereinafter referred to as “telecine conversion”) and transmitted. ing. The telecine-converted video is generally called a telecine video. That is, it can be considered that the image is stationary between two to three fields converted from the same film image. Therefore, especially when the object moves, the movement of the object in the video after telecine conversion (telecine video) may move or stop, which may seem jerky.

  This phenomenon is particularly noticeable in a scene that moves in one direction. Therefore, in order to alleviate this phenomenon for telecine video, for example, the motion direction is detected from a plurality of previous and subsequent frames, an interpolated image is generated by filling the space between the frames, and an interpolated frame is generated to convert the frame rate. Television broadcast receivers to which a frame rate conversion technique for smoothing the later movement of video is applied are becoming popular in the market. Hereinafter, such frame rate conversion is referred to as “motion adaptive frame rate conversion”, and a technique for smoothing the motion of video using this motion adaptive frame rate conversion is referred to as “smooth cinema”.

  In order to appeal the effect of the “smooth cinema” technology to customers at the store, or for the user to set the image quality adjustment, in the television broadcast signal reception mode, for example, the telecine video as the original video in the left area of the display screen Is displayed, and a demo mode is displayed in which a video in which image quality adjustment by “smooth cinema” is performed on a telecine video is displayed in the right area. At this time, if the received television broadcast signal is a telecine video, the effect of “smooth cinema” can be appealed in a moving scene. However, a telecine video is not always broadcast, and a normal video source video whose original video is not a film source is also broadcast. If the received video signal of the broadcast is not a telecine video, there is no “smooth cinema” effect and the effect cannot be appealed. This is because in the demo mode in which images before and after image quality adjustment are displayed on the same screen, it is more difficult to see the effect, so it is difficult to confirm the effectiveness of “smooth cinema”. There is a possibility. Therefore, in the following, an embodiment of a video display device with improved usability will be described.

  FIG. 1 is a schematic configuration diagram of a television broadcast receiver according to the first embodiment.

  As shown in FIG. 1, the television broadcast receiver includes a tuner unit 100, a hard disk drive device (hereinafter referred to as “HDD drive device”) 150, a selector 160, and an input video signal and audio signal (hereinafter referred to as “HDD drive device”). A signal processing unit 200 that performs predetermined signal processing on the “AV signal”, a video display unit 300, and an arithmetic control unit 400. In the present embodiment, for ease of explanation, the tuner unit 100 and the HDD driving device 150 are cited as video signal sources input to the signal processing circuit 200. An external device such as a video playback device may be added.

  The tuner unit 100 includes a channel selection unit 101, a demultiplexer 102, and an MPEG (Moving Picture Experts Group) decoder 103. The signal processing unit 200 includes an interlace-progressive conversion (IP conversion) unit 201, a telecine detection unit 202, a scaler 203, a frame rate converter (hereinafter abbreviated as “FRC”) 204, and a telecine detection unit 205. An image quality correction unit 206, a divided signal generation unit 207, and an OSD circuit 208. The arithmetic control unit 400 receives infrared signals from a CPU (Central Processing Unit) 401, a flash memory 402, a memory 403, a key input unit 411, and a remote controller (hereinafter abbreviated as “remote controller”) 70. And a light receiving unit 412 for receiving.

  First, the calculation control unit 400 will be described.

  The light receiving unit 412 receives, for example, an infrared (IR) remote control signal from the remote control 70 that performs remote control of the television broadcast receiving apparatus, converts the signal into an electrical signal, and outputs the electrical signal to the CPU 401. The key input unit 411 includes a plurality of operation buttons (not shown), and detects a button (key) operation by the user. On the remote control 70 and / or the key input unit 411, a dedicated content demo mode instruction button (not shown) for performing a demo mode based on the video of the demo mode dedicated content from the HDD driving device 150, and reception by the tuner unit 100 It is assumed that there is a tuner demo mode instruction button (not shown) for performing a demo mode with the program video and a demo mode cancel button (not shown) for canceling these demo modes. The demo mode instruction button may be instructed by one button operation or may be instructed by simultaneous operation of a plurality of buttons. In the following, it is assumed that there are a demo mode instruction button and a demo mode cancel button on the remote controller 70.

  The CPU 401 operates in accordance with a program stored in the rewritable nonvolatile flash memory 402 by operating the key input unit 411 by the user or by receiving a command from the remote controller 70 via the light receiving unit 412. Controls each part of the broadcast receiving apparatus. Although details will be described later, for example, when an operation of a tuner demo mode instruction button for performing a demo mode on a program video received by the tuner unit 100 is received, a signal is issued to execute the demo mode on the program video received by the tuner unit 100 The processing unit 200 is controlled. Further, the CPU 401 has a determination unit that determines whether or not to perform image quality adjustment (here, motion adaptive frame rate conversion) of the video signal based on the attribute of the program (content). In the present embodiment, for example, the determination unit performs motion adaptive frame rate conversion when the program attribute indicates cinema, and determines that the frame rate conversion is not performed when the program attribute indicates other than cinema. In order for the determination unit to perform program attribute determination processing, the CPU 401 sequentially acquires necessary EPG (Electronic Program Guide) information from the demultiplexer 102 in advance, and stores the acquired EPG information in the memory 403. Keep it. In the demo mode, it is determined from the EPG information stored in the memory 403 whether or not the attribute of the program is cinema, and execution, interruption, termination, OSD display, and other operations of the demo mode under the demo mode are determined. Take control. Further, the telecine detection flag (hereinafter referred to as “telecine detection F”) input from the telecine detection unit 202 and the telecine detection unit 205 is used to reinforce program (content) attribute determination. That is, the CPU 401 is a control unit such as the FRC 204 that is an image quality adjustment unit, the OSD circuit 208, the tuner unit 100, and the selector 160, and also functions as an attribute detection unit that detects the attribute of the broadcast program.

  The memory 403 is a working memory composed of a RAM (Random Access Memory). For example, program specific information (PSI) such as PAT (Program Association Table) and PMT (Program Map Table), SDT (Service Description Table), and EIT (EIT) are stored in this memory via a demultiplexer 102. EPG information such as Event Information Table) is written. Note that the PSI and EPG information stored in the memory 403 is stored and held in the flash memory 402 when the power is turned off.

  In this embodiment, as will be described in detail later, a video of “smooth cinema” using 2-3 pull-down video (telecine video) and motion-applied frame rate conversion that generates an interpolated image from a plurality of frames before and after. , For example, when a demo mode for displaying the images in parallel on the left and right of the same screen is instructed by the user via the remote controller 70, for example, a program attribute determination process is performed to determine the attributes of the received program. ), The demo mode is executed. Otherwise, the execution of the demo mode is suspended (or interrupted), for example, the original image is displayed on the entire screen, or the original image is displayed on both the left and right screens.

  The HDD driving device 150 includes a recording medium and an adjustment video data processing unit. Here, a hard disk drive (HDD) is used as a recording medium on which cinema content for demo mode is recorded. A detailed description of the hard disk drive 150 is omitted.

  Next, the tuner unit 100 will be described. The tuner unit 100 receives a digital television broadcast (for example, terrestrial digital television broadcast, BS digital digital television broadcast, etc.) and outputs desired broadcast program data. 102 and an MPEG decoder 103.

  The channel selection unit 101 selects and demodulates a desired broadcast channel included in the broadcast signal (RF signal) received by the antenna 10 under the control of the CPU 401 that constitutes the arithmetic control unit 400, and various data are received. The multiplexed TS (Transport Stream) is output to the demultiplexer 102. Note that the TS includes broadcast data (for example, compressed data obtained by compressing a video signal and an audio signal of a program) and various types of additional information (for example, program specifying information and program arrangement information). Examples of program specific information (PSI: Program Specific Information) that is additional information of a video program include PAT (Program Association Table), PMT (Program Map Table), and NIT (Network Information Table). Moreover, as program arrangement information (SI: Service Information), for example, there is EPG information that forms a base of an electronic program table such as SDT (Service Description Table) and EIT (Event Information Table).

  The demultiplexer 102 extracts necessary data (TS packet) from the TS output from the channel selection unit 101 according to the filter condition set by the CPU 401 and separates it. For example, a TS packet of AV data of a desired broadcast program included in a desired channel is extracted and output to the MPEG decoder 103. Further, program arrangement information (SI), for example, TS packets of EPG information such as SDT and EIT, is extracted and stored in the memory 403 via the CPU 401.

  The filter condition is set based on the information content described in the PAT, PMT, etc. stored in the memory 403 by the CPU 401. For example, when AV data of a video program in a desired channel is extracted, a PID (Packet Identification) corresponding to the service id (program number) of the desired channel is found from the PAT and PMT, and the PID is set in the demultiplexer 102. Then, the demultiplexer 102 extracts the TS of AV data having the PID.

  The MPEG decoder 103 performs a decoding process on the AV data of the broadcast program input from the demultiplexer 102 and outputs a video signal and an audio signal (AV signal) to the selector 160.

  Here, the selector 160 switches between the AV signal input from the tuner unit 100 and the AV signal input from the HDD drive circuit 150 based on the control of the CPU 401 and outputs the signal to the signal processing unit 200. When the AV signal input from the HDD drive circuit 150 is selected, the demo mode can be performed using the moving image content dedicated to the demo mode.

  Next, the signal processing circuit 200 will be described. In the following description, for the sake of simplicity, the description regarding the audio signal is omitted, and the video signal is described.

  The video signal input to the signal processing unit 200 is first input to the IP conversion unit 201. If the input video signal is an interlace format, the IP conversion unit 201 converts it to a progressive format. If the input video signal is a progressive format, it is output as it is.

  The telecine detection unit 202 detects whether the input video signal is a 2-3 pulldown interlaced telecine video signal.

    As described with reference to FIG. 7, the 2-3 pull-down telecine video signal includes, for example, two fields converted from the same frame (odd-numbered frame) video and the next same frame (even-numbered frame). 5) consisting of 3 fields converted from the video of () are collectively formed one after another. Therefore, for example, the third field Bo and the fifth field Bo in FIG. 7 are the same video signal, so the interframe difference is zero. Further, since the eighth field De and the tenth field De are also the same video signal, the inter-frame difference is zero. That is, when the inter-frame difference is considered, a field in which the difference becomes zero occurs every 5 fields. Therefore, when the inter-frame difference is obtained, the telecine video signal can be identified by detecting that a field where the difference is zero occurs every five fields. In addition, the phase detection of the telecine video signal required when the telecine video signal is IP-converted, for example, can be easily identified from the timing when the frame difference value becomes zero.

  When the telecine detection unit 202 detects that the input video signal is a 2-3 pulldown interlace telecine video signal, the telecine detection unit 202 sends a telecine detection F (telecine detection flag) indicating that the video signal is a telecine video to the CPU 401. . Further, for example, telecine phase information and telecine detection F are sent to the IP conversion unit 201. The telecine detection unit 202 does not perform telecine detection when the input video signal is a 2-3 pull-down progressive video signal.

  When receiving the telecine detection F, the IP conversion unit 201 performs IP conversion on the telecine video signal. The IP conversion operation will be described with reference to FIG. For the sake of simplicity, it is assumed that the field number and the field suffix are not changed even after reverse pulldown conversion.

  FIG. 8 is a diagram schematically illustrating the IP conversion operation. When the telecine video signal is input, the IP conversion unit 201 first deletes the fifth field Bo and the tenth field De, which are duplicate fields, based on telecine phase information (not shown) as shown in FIG. -3 Pull down conversion (also referred to as “reverse pull down conversion”). Next, the first field Ao and the second field Ae of the telecine video signal are fitted into the first frame A, and the second frame repeats the first frame. Next, the third field Bo and the fourth field Be are inserted into the third frame B, and the fourth frame and the fifth frame repeat the third frame. Similarly, the sixth field Ce and the seventh field Co are inserted into the sixth frame C, and the sixth frame repeats the sixth frame. In the eighth frame, the eighth field De and the ninth field Do are fitted into the eighth frame D, and the ninth and tenth frames repeat the eighth frame.

  Note that such frame rate conversion that repeats the same frame video is referred to as “repeat conversion” for the convenience of the following description. Similar to the interlaced 2-3 pull-down type telecine conversion pointed out in the problem section, the repeat conversion, for example, in a scene moving in one direction of a cinema (movie content), the movement of an object moves or stops. May appear jerky.

  For example, when the CPU 401 instructs the division signal generation unit 207 to output a screen division signal for dividing the screen into two left and right screens, the division signal generation unit 207 is based on the horizontal synchronization signal H and the vertical synchronization signal V of the input video signal. Then, a screen division signal S207 is generated and output to the scaler 203 and the FRC 204.

  Under the control of the CPU 401, the scaler 203 performs pixel interpolation in the horizontal direction and the vertical direction on the input video signal so that the resolution can be displayed by the video display unit 300, and the interpolated video signal is displayed. Output to FRC 204. Further, for example, when the scaler 203 receives an instruction from the CPU 401 to divide the display screen into a left region and a right region and receives the screen division signal S207 from the division signal generation unit 207, the scaler 203 is illustrated in FIG. Thus, based on the screen division signal S207, a video signal is generated by compressing the input video signal by half in the horizontal direction and the vertical direction so that the display screen can be displayed in each of the left and right areas. To do.

  In the present embodiment, in the FRC 204 described later, as shown in FIG. 2B, the second video (that is, the program video image quality in the second state (namely, the shaded area) on the left side of the display screen) A smooth cinema video with motion adaptive frame rate conversion) is displayed, and a first video with the image quality of the program video in the first state (that is, a cinema video with repeat conversion) is displayed in the right area. Of course, the display may be reversed.

  The telecine detection unit 205 is characterized in that, for example, as shown in FIG. 8, the same frame is repeated three times in units of 5 frames from the repeat-converted progressive format video signal output from the scaler 203. Is used to detect telecine, and the telecine detection F is sent to the FRC 204 and also sent to the CPU 401. It will be apparent that telecine detection is detected from the video in the left area (or right area) of the display screen because the video signal is compressed in half in the horizontal direction.

  The FRC 204 performs frame rate conversion on the input video signal under the control of the CPU 401. For example, when the double speed display mode is set, a video signal of 60 frames / second is converted into a video signal of 120 frames / second of double speed. Further, when the input video signal is a telecine video signal and the “smooth cinema” mode processing is instructed from the CPU 401, the FRC 204 performs reverse pull-down conversion to convert the original cinema video signal of 24 frames / second. After the reproduction, for example, the motion direction is detected from at least a plurality of frames before and after, and an interpolated image is generated by interpolating between the frames to perform motion adaptive frame rate conversion. In this case, the frame rate of the repeat-converted telecine video signal input to the FRC 204 and the frame rate of the telecine video signal after the motion adaptive frame rate conversion are the same. In addition, when the FRC 204 is instructed by the CPU 401 to perform the demo mode process by “smooth cinema” and receives the screen division signal S207 from the division signal generation unit 207, the FRC 204 based on the screen division signal S207 in FIG. As described above, for the compressed telecine video signal in the left area (second video area) of the display screen input from the scaler 203, motion adaptive frame rate conversion is performed to obtain a smooth cinema video as the second video. For the compressed telecine video signal in the region (first video region), a process is performed in which the motion-adapted frame rate conversion is not performed and the repeat-converted cinema video as the first video is output as it is.

  The image quality correction unit 206 performs image quality correction such as sharpness, noise reduction, contrast, hue, saturation, gamma, and brightness on the video signal from the FRC 204. Then, the image quality correction unit 206 sends the image signal whose image quality has been corrected to the OSD circuit 208.

  The OSD circuit 208 synthesizes a predetermined character signal with the video sent from the image quality correction unit 206 under the control of the CPU 401 and sends the output to the video display unit 300.

  The video display unit 300 is a flat display panel, for example, and includes a plasma display panel (hereinafter abbreviated as “PDP”), a liquid crystal panel, and the like. The video display unit 300 displays the video signal input from the signal processing unit 200. When the video display unit 300 is configured by a liquid crystal panel, it is effective to use a double speed display function depending on the characteristics of the panel.

  The television broadcast receiver according to the present embodiment is configured as described above. Therefore, for example, when a telecine video of a cinema program received by the tuner unit 100 is viewed on the video display unit without using the “smooth cinema” mode, the interlaced cinema video by the 2-3 pull-down method is repeated by the IP conversion unit 201. It is converted into a converted progressive format cinema video signal. Then, the telecine video signal subjected to repeat conversion is input to the video display unit 300 and displayed. When viewing in the “smooth cinema” mode, the telecine video signal that has been subjected to repeat conversion by the IP conversion unit 201 is further subjected to motion adaptive frame rate conversion by the FRC 204 and then input to the video display unit 300 for display. In the case of the “smooth cinema” demo mode in the program video received by the tuner unit 100, the telecine video signal that has been repeatedly converted by the IP conversion unit 201 is compressed by 1/2 in the horizontal and vertical directions by the scaler 203. Thus, the display screen can be displayed in each area divided into a left area and a right area. Then, the FRC 204 performs motion adaptive frame rate conversion on the compressed telecine video signal in the left area of the display screen, and outputs the compressed telecine video signal in the right area as it is.

  Next, demo mode processing based on program attributes when the demo mode is instructed in the program video received by the tuner unit 100 will be described with reference to FIG.

  FIG. 3 is a flowchart schematically illustrating the demo mode process including the program attribute determination process according to the present embodiment.

  In FIG. 3, when a demo mode of “smooth cinema” in the program video received by the tuner unit 100 is instructed by a customer (not shown) via the remote controller 70, the CPU 401 stores the current image quality setting state in, for example, the memory 403. After (so-called preset), demo mode processing is started. Then, the CPU 401 determines whether or not the attribute of the program received by the tuner unit 100 is cinema at step (hereinafter, step is indicated by “S”) 1. In this embodiment, this determination is made using EPG information that is acquired and stored in advance in the memory 403 from the tuner unit 100. If it is determined in S1 that the attribute is cinema and Y (yes), the CPU 401 proceeds to S2, and if the attribute is not cinema but N (no), the CPU 401 proceeds to S11.

  In S <b> 2, the CPU 401 checks whether a telecine detection F (flag) that is output when a telecine video is detected from the telecine detection unit 202 and the telecine detection unit 205 is input. If the program video received and output by the tuner unit 100 is a 2-3 pulldown interlaced telecine video signal, the telecine detection F is input from both the telecine detection unit 202 and the telecine detection unit 205. . When the program video is a 2-3 pull-down progressive format telecine video signal, the telecine detection F is not input from the telecine detection unit 202 but is input only from the telecine detection unit 205. That is, when the program video is a 2-3 pull-down telecine video signal, at least telecine detection F is input from the telecine detection unit 205. Therefore, only the telecine detection F from the telecine detection unit 205 may be checked. If the determination in S2 is Y, the process proceeds to S3, and if N, the process proceeds to S11.

  If the determination of S1 and S2 is N, or if S1 is Y and S2 is N, the CPU 401 suspends the demonstration mode process and interrupts the execution in S11. Then, the setting state of the television broadcast receiving apparatus before the transition to the demo mode is recalled from the memory 403 and reproduced. That is, the CPU 401 displays the received program video in full screen on the signal processing unit 200 in a preset image quality setting state (setting state in which motion adaptive frame rate conversion is not performed) before shifting to the demo mode, or in the demonstration. An instruction is given to display the received program video side by side in the screen right area and screen left area in a preset image quality setting state (setting state in which motion adaptive frame rate conversion is not performed) prior to entering the mode. Thereafter, the process proceeds to S4. The state where S1 is Y and S2 is N corresponds to, for example, a case where the program is a cinema program but is currently being commercial broadcast. Even if the “Smooth Cinema” demo mode is executed during commercial broadcast reception, the effect cannot be exhibited. Assuming such a case, in this embodiment, first, the EPG information is used to determine the cinema attribute of the program, and second, the telecine detection F is used to temporarily stop the cinema program (for example, due to commercials). Judgment is made. That is, in this embodiment, the attribute detection unit for detecting the attribute of the broadcast program is composed of two attribute detection units, the first attribute detection unit is the arithmetic control means 400, and the second attribute detection unit is the telecine detection. Parts 202 and 205. Note that the attribute detection unit may be only the arithmetic control unit 400 or only the telecine detection unit 205.

  In S <b> 3, the CPU 401 causes the signal processing unit 200 to perform a reverse-converted telecine video using the 2-3 pull-down method, and then repeat-convert the IP-converted repeat-converted telecine video and the motion adaptive frame rate converted “ Control is performed so that the telecine video of “smooth cinema” is displayed in parallel on the left and right of the same screen, for example. Then, the process proceeds to S4.

  When the CPU 401 proceeds to S4, it detects a key operation by the customer at the key input unit 411 and a remote control 70 operation by the customer through the light receiving unit 412, and a demo mode release button (not shown) is operated, Determine if demo mode is turned off. If N, the process proceeds to S21, performs other processes, and returns to S1. If Y in S4, the setting state of the television broadcast receiving apparatus before shifting to the demo mode is reproduced, and the demo mode is terminated. Of course, when the display in the smooth cinema mode is instructed following the operation of the demo mode release button, the CPU 401 controls the signal processing unit 200 to display the telecine video in the smooth cinema mode.

  As described above, according to the present embodiment, when the tuner demo mode instruction button is operated, the arithmetic control means 400 as the first program attribute detection means and the telecine detection as the second program attribute detection means. Using the means 202 and 205, it is possible to detect whether or not the received program has a cinema attribute. If the attribute is cinema, demo mode processing is executed, otherwise the demo mode is suspended (or interrupted). Therefore, an appropriate demo mode can be provided by using the program video received by the tuner without using demo-dedicated cinema content. This makes it possible to receive a television broadcast signal at a store of a large-scale store (so-called mass retailer) to demonstrate a demo mode that has an appealing effect to customers, and to adjust the image quality of the user. Therefore, it is possible to appropriately display a demonstration mode screen for providing a video display device with improved usability.

  In the above-described embodiment, for example, a repeat-converted telecine video and a “smooth cinema” telecine video subjected to motion adaptive frame rate conversion are placed on the left and right of the same screen, for example. Although the present invention is applied to the demonstration mode in which the images are arranged and displayed in parallel, the present invention is not limited to this.

  For example, a double-speed frame rate conversion image obtained by converting a 60 frame / second image to a 120 frame / second image and the original 60 frame / second original image are displayed in parallel on the left and right sides of the same screen. The present invention can also be applied to the demonstration mode. In this case, moving image content with fast motion is desirable as the video content that can effectively display the double speed display. One example is a sports program video. Therefore, in the demonstration mode of the double speed display, if the attribute of the program is “sport”, the demonstration mode can be made effective.

  In addition, commercial broadcasts are sometimes inserted even in sports programs. Commercial broadcast waves are generally slow. Therefore, when the FRC 204 detects, for example, the change amount or change speed of the motion vector between the preceding and succeeding frames and the detected value exceeds a predetermined threshold value, the motion detection F (flag) is input to the CPU 401. By doing so, it can be considered that the movement of the output video is fast. That is, in the double speed display demo mode, the motion detection F (flag) can be used to improve the reliability of the double speed display demo.

  Further, in this embodiment, the present invention is applied to a demonstration mode in which a video signal is compressed in half in the horizontal direction and the vertical direction, and the compressed video is displayed in parallel in, for example, left and right areas of the same screen. However, the present invention is not limited to this. For example, without compressing the video signal, the display screen is divided into left and right areas, and the right area is displayed as a repeat-converted telecine video signal, and the left area is converted into a repeat-converted telecine video signal. You may make it display with the telecine video signal of "smooth cinema" which performed motion adaptive frame rate conversion. Alternatively, the screen may be divided into a plurality of areas, and a predetermined area may be displayed as a “smooth cinema” telecine video signal obtained by performing motion adaptive frame rate conversion on a telecine video signal subjected to repeat conversion.

  In the first embodiment, the demo mode is executed when the attribute of the program of the currently received channel is cinema, and the demo mode is suspended or interrupted when it is not a cinema. It is not limited.

  If the program attribute of the currently received channel is not cinema, if there is another channel whose program attribute is cinema, the channel may be re-selected.

  Thereby, even if the received program is a program that cannot obtain the effect of image quality adjustment, a program that can obtain the effect can be selected, so that an appropriate demonstration screen can be provided. This process can be realized by correcting FIG. 3 which is a flowchart of the first embodiment. A second embodiment to which such processing is added will be described below.

  FIG. 4 is a flowchart of the demo mode process according to the second embodiment. Since the present embodiment is different in that processing S31 and S11 are added between the processing S1 and S11 of FIG. 3 which is the flowchart of the first embodiment, the added processing S31 and 32 will be described.

  In S1, the CPU 401 determines the program attribute of the current reception channel. If it is a cinema, the process proceeds to S2, and if it is not a cinema, the process proceeds to S31. In S31, it is checked whether there is a program whose program attribute is cinema from EPG information of a receivable television broadcast (for example, terrestrial digital broadcast, BS digital broadcast, etc.) stored in the memory 403. If there is, the process proceeds to S32, the tuner unit 100 is controlled to select the channel of the cinema program, and the process proceeds to S2. If there is no other cinema program in S31, the process proceeds to S11 and the demonstration mode is put on hold.

  According to the above embodiment, even if the received program is a program that cannot obtain the effect of image quality adjustment, a program that can obtain the effect can be selected, so that an appropriate demonstration screen can be provided.

  In this embodiment, the channel is re-selected when a video signal not suitable for image quality adjustment is received. However, this embodiment is not limited to this. For example, when a video signal that is not suitable for image quality adjustment is received, image quality correction (for example, sharpness, noise reduction, contrast, hue, etc.) is performed on the left area (second video area) of the display screen by an image quality correction unit 206 different from the FRC 204. A demonstration screen on which image quality correction (such as saturation, gamma, and brightness) has been corrected may be displayed. Thus, even when a video signal that is not suitable for motion adaptive frame rate conversion is received, it is possible to continue providing a demonstration screen for image quality correction.

  Further, the present embodiment is not limited to the above-described form. For example, when a video signal not suitable for image quality adjustment is received, a predetermined moving image sample (for example, a film suitable for motion adaptive frame rate conversion) stored in the HDD driving device 150 in the left area (second video area) of the display screen in advance. A moving image sample may be read from the HDD driving device 150 so as to display a video. Thereby, even when a video signal that is not suitable for motion adaptive frame rate conversion is received, it is possible to continue to provide an appropriate demonstration screen.

  In the first embodiment, repeat conversion telecine video and motion-smooth frame rate converted “smooth cinema” telecine video are arranged in parallel on the left and right of the same screen, for example, for 2-3 pull-down telecine video. When performing the demo mode to display, to detect the telecine video, first detect the cinema attribute of the program from the EPG information, and secondly use the telecine detection unit to detect the 2-3 pull-down telecine video Thus, the program attribute determination is reinforced, but the present invention is not limited to this.

  For example, as is apparent from the demo mode process flow diagram of FIG. 3, even if the process of detecting the cinema attribute of the program from the EPG information of S1 is eliminated, the telecine video detection using the telecine detection unit of S2 is sufficient. According to such a method, the attribute detection process can be simplified, and a more practical video display device can be provided.

  FIG. 5 is a schematic configuration diagram of a television broadcast receiving apparatus according to a third embodiment in which cinema attributes are detected only by the telecine detection unit. FIG. 6 is a flowchart of the demo mode process in the second embodiment.

  5 is different from FIG. 1 of the first embodiment in that the telecine detection F is input only from the telecine detection unit 205 to the CPU 401A of the arithmetic and control unit 400A. Further, as apparent from FIG. 6, it differs from FIG. 3 of the first embodiment in that the program attribute determination using the EPG information is not performed. Others are the same as those in the first embodiment, and different points will be described below.

  The CPU 401A receives PSI and EPG information from the tuner unit 100. This is because the channel selection processing of the channel selection unit 101 of the tuner unit 100 and the desired program of the reception channel from the TS transmitted from the channel selection unit 101 are performed. This is because AV data is extracted and input to the MPEG decoder 103, and timer recording control of a recording unit (not shown) is performed. In this embodiment, as shown in FIG. 5, the cinema attribute of the program is not determined from the EPG information.

  Although described in the first embodiment, even if the 2-3 pull-down interlace format telecine video is converted to the progressive format by the repeat conversion in the IP conversion unit 201, the telecine detection unit 205 performs the progressive telecine video. Since telecine is detected from the signal and telecine detection F (flag) is input to the CPU 401A, it is not always necessary to input the telecine detection F (flag) of the telecine detection unit 202 to the CPU 401A.

  Thus, the processing program of the CPU 401A can be simplified, wiring can be simplified, and the attribute information detection process can be simplified, so that a more practical video display device can be provided.

  In the first embodiment, an image without motion adaptive frame rate conversion is displayed in the right region of the display region, and a smooth cinema image or motion adaptation that has been subjected to motion adaptive frame rate conversion based on the attribute information of the video signal is displayed in the left region of the display screen. An image without frame rate conversion was displayed.

  However, when the video signal attribute information does not represent cinema, and a video that is not subjected to motion adaptive frame rate conversion (smooth cinema function OFF) is displayed on the right screen and the left screen, in this embodiment, in the display area, Character information indicating whether the right screen or the left screen is the one to which the smooth cinema function is applied is displayed. As a result, the user can determine whether or not the screen has the smooth cinema function applied, and the possibility of misunderstanding the smooth cinema function is reduced.

  Example 4 will be described with reference to FIG.

  For example, when a video signal whose attribute information represents a cinema is received, the CPU 401 detects the attribute information detection unit and performs the smooth cinema function in the left area of the screen and does not perform the smooth cinema function in the right area of the screen. Next, the FRC 204 is controlled. At this time, in accordance with this control, the CPU 401 displays character information (for example, “smooth cinema ON”) indicating that a smooth cinema function is being performed in the area on the left side of the screen, and in the area on the right side of the screen. The OSD circuit 208 is controlled to display character information (for example, “smooth cinema OFF”) indicating that the smooth cinema function is not performed (FIG. 9A).

  On the other hand, when a video signal representing an attribute whose attribute information is not cinema is received, the CPU 401 detects the attribute information detection unit and performs a smooth cinema function on the video signal displayed in the left area and right area of the screen. The FRC 204 is controlled so as not to exist. At this time, in accordance with this control, the CPU 401 controls the OSD circuit 208 to display character information (for example, “smooth cinema OFF”) indicating that the smooth cinema function is not performed in the left area and the right area of the screen. (FIG. 9 (b)).

  According to the above embodiment, even when a demonstration screen that is not adjusted in image quality is displayed on the left and right screens, the user can determine whether or not the image is adjusted in image quality. The video display device has improved usability for the user.

  Further, the present embodiment is not limited to this, and character information about the operation performed in the second embodiment can also be displayed.

  For example, while receiving a video signal indicating that the attribute information is not a cinema and re-selecting a cinema program, text information indicating that the channel is being re-selected (for example, “Cinema program being selected”) is displayed. To do. As a result, the user can determine that a program providing an appropriate demonstration screen is selected.

  Further, the present embodiment is not limited to the above-described form. For example, a video signal representing an attribute whose attribute information is not cinema is received, and image quality correction (for example, sharpness, noise reduction, contrast, hue, saturation, gamma) is performed on the left area of the display screen by an image quality correction unit 206 different from the FRC 204. When displaying a demo screen that has been subjected to image quality correction such as brightness, character information indicating the content of the image quality correction (for example, “sharpness correction in progress”) is displayed. Thus, even when a video signal that is not suitable for motion adaptive frame rate conversion is received, it is possible to continue providing a demonstration screen for image quality correction, and the user can know the content of the image quality correction. .

1 is a schematic configuration diagram of a television broadcast receiver according to Embodiment 1. FIG. FIG. 6 is a diagram for explaining division of a display screen according to the first embodiment. The flowchart of the demonstration mode process provided with the program attribute determination process by Example 1. FIG. FIG. 10 is a flowchart of demo mode processing according to the second embodiment. FIG. 6 is a schematic configuration diagram of a television broadcast receiver according to a third embodiment. FIG. 10 is a flowchart of demo mode processing according to the third embodiment. The figure explaining 2-3 pull-down system telecine conversion operation. The figure which illustrates operation | movement of IP conversion typically. FIG. 10 is a diagram for explaining a display screen according to the fourth embodiment.

Explanation of symbols

10 antenna, 70 remote controller, 100 tuner unit, 150 HDD drive device, 160 selector, 200 signal processing unit, 101 channel selection unit, 102 demultiplexer, 103 MPEG decoder, 201 IP conversion unit, 202 telecine detection unit, 203 scaler, 204 FRC 205 telecine detection unit 206 image quality correction unit 207 divided signal generation unit 208 OSD circuit 300 video display unit 400 calculation control unit 401 CPU 402 flash memory 403 memory 411 key input unit 412 light receiving unit S207 Screen split signal,

Claims (18)

In a video display device that displays a video signal,
A detection unit for detecting attribute information of the video signal;
An image quality adjustment unit for adjusting the image quality of the video signal;
The video signal is displayed on a display screen including a first region for displaying a video signal whose image quality is not adjusted by the image quality adjusting unit and a second region for displaying a video signal whose image quality is adjusted or not adjusted by the image quality adjusting unit. A display unit for displaying,
A control unit,
The video display device, wherein the control unit controls the image quality adjustment unit to adjust an image quality of a video signal to be displayed in the second area using attribute information detected by the detection unit. The video display device according to claim 1,
The image display device, wherein the attribute information detection unit detects attribute information of the video signal by detecting EPG information of the video signal and / or telecine detection of the video signal. The video display device according to claim 1,
The video display device, wherein the image quality adjustment unit detects a motion of a video signal from a plurality of frames of the video signal, generates an interpolated frame between frames, and converts a frame rate of the video signal. The video display device according to claim 1,
The video display device, wherein the control unit includes a determination unit that determines whether the image quality adjustment unit adjusts an image quality of the video signal based on attribute information detected by the detection unit. The video display device according to claim 4,
A channel selection unit for selecting a channel of the video signal;
When the determination unit determines that the image quality adjustment unit does not adjust the image quality of the video signal based on the attribute information, the control unit reselects a channel based on the EPG information of the video signal. Control device. The video display device according to claim 4,
A second image quality adjustment unit for adjusting an image quality different from the image quality adjustment unit;
When the determination unit determines that the image quality adjustment unit does not adjust the image quality of the video signal based on the attribute information, the control unit outputs the video signal to be displayed in the second area to the second image quality adjustment unit. And controlling the second image quality adjusting unit to adjust the image quality. The video display device according to claim 4,
It has a storage unit that stores video samples in advance,
When the determination unit determines that the image quality adjustment unit does not adjust the image quality of the video signal based on the attribute information, the control unit displays the moving image sample in the second area from the storage unit. An image display device that controls the storage unit to read out the moving image sample. The video display device according to claim 4,
An OSD circuit that combines predetermined character information with the video signal and causes the display unit to display the OSD circuit;
When the determination unit determines that the image quality adjustment unit does not adjust the image quality of the video signal based on the attribute information, the image quality adjustment by the image quality adjustment unit is performed in the second area. A video display device, wherein the OSD circuit is controlled to display character information indicating that there is no text in the second area. The video display device according to claim 4,
When the determination unit determines that the image quality adjustment unit does not adjust the image quality of the video signal based on the attribute information, the control unit displays an image whose image quality is not adjusted by the image quality adjustment unit on the entire screen of the display unit. An image display device that controls the display unit to display. In a video display device that displays a video signal,
A display unit for displaying the video signal including the first region and the second region on a display screen;
A detection unit for detecting attribute information of the video signal;
A motion adaptive frame rate conversion unit that detects a motion of the video signal from a plurality of frames of the video signal, generates an interpolated frame between the frames, and converts a frame rate of the video signal;
A control unit,
The control unit does not perform frame rate conversion on the video signal displayed in the first area by the motion adaptive frame rate conversion unit, and detects the video signal displayed in the second area by the detection unit. A video display device, wherein the motion adaptive frame rate conversion unit is controlled so that the frame rate conversion is performed by the motion adaptive frame rate conversion unit or the frame rate conversion unit does not perform frame rate conversion based on the attribute information. The video display device according to claim 10,
The image display device, wherein the attribute information detection unit detects attribute information of the video signal by detecting EPG information of the video signal and / or telecine detection of the video signal. The video display device according to claim 10,
The control unit includes a determination unit that determines whether the image quality adjustment unit adjusts the image quality of the video signal based on the attribute information detected by the detection unit,
When the determination unit determines that the image quality adjustment unit does not adjust the image quality of the video signal based on the attribute information, the control unit displays the video signal displayed in the first area and the second area on the video signal. A video display apparatus, wherein the motion adaptive frame rate conversion unit controls the motion adaptive frame rate conversion unit so as not to perform frame rate conversion. 13. The video display device according to 12, wherein
An OSD circuit that combines predetermined character information with the video signal and causes the display unit to display the OSD circuit;
When the determination unit determines that the image quality adjustment unit does not adjust the image quality of the video signal based on the attribute information, the control unit determines that the first region and the second region are determined by the image quality adjustment unit. An image display apparatus, wherein the OSD circuit is controlled so that character information indicating that image quality adjustment has not been performed is displayed on the display unit. In a video display device that displays a video signal,
An input unit to which the video signal is input;
A motion adaptive frame rate conversion unit that detects a motion of the video signal from a plurality of frames of the video signal, generates an interpolated frame between the frames, and converts a frame rate of the video signal;
A display unit for displaying the video signal including the first region and the second region on a display screen,
When a video signal whose attribute information of the video signal is not film video is input to the input unit, a video signal that is not subjected to frame rate conversion by the motion adaptive frame rate conversion unit is input to the first region and the second region. A video display device characterized by being displayed. The video display device according to claim 14,
When a video signal whose attribute information of the video signal is not film video is input to the input unit, the display unit includes a frame rate by the motion adaptive frame rate conversion unit in the first area and the second area. A video display device, wherein character information indicating that conversion has not been performed is displayed on the display unit. In a video processing apparatus that processes an input video signal,
A detection unit for detecting attribute information of the video signal;
An image quality adjustment unit for adjusting the image quality of the video signal;
An output unit that outputs the video signal whose image quality has been adjusted by the image quality adjustment unit to a display unit that displays the video signal on a display screen including a first area and a second area;
A control unit,
The video processing apparatus, wherein the control unit controls the image quality adjustment unit to adjust an image quality of a video signal displayed in the second area based on attribute information detected by the detection unit. The video processing apparatus according to claim 16, wherein
The video processing apparatus, wherein the attribute information detection unit detects attribute information of the video signal by detecting EPG information of the video signal and / or telecine detection of the video signal. The video processing apparatus according to claim 16, wherein
The video processing apparatus, wherein the image quality adjustment unit detects a motion of a video signal from a plurality of frames of the video signal, generates an interpolated frame between frames, and converts a frame rate of the video signal.

Images