JP4982458B2 - Video display system, transmitter, receiver, and video display device - Google Patents

Description

  The present invention relates to a video display system that transmits a video signal wirelessly to display a video, and a video display device that includes a transmitter, a receiver, and a receiver for transmitting a video signal wirelessly.

  2. Description of the Related Art In recent years, with the development of wireless transmission technology, there has been known a video display system that wirelessly transmits a video signal output from a video signal output device such as a DVD player and displays a video on a remote video display device. (For example, refer to Patent Document 1).

  Specifically, the video display system includes a video signal output device that outputs a video signal, a transmitter that wirelessly transmits the video signal output by the video signal output device, and a video signal transmitted by the transmitter. The receiver includes a receiver and a video display device that displays a video based on a video signal received by the receiver.

The transmitter includes a terminal group including, for example, a component terminal and a DVI terminal, and is configured to wirelessly transmit a video signal input to the transmitter via any terminal to the receiver. ing.
JP 2004-343725 A

  By the way, in the above conventional video display system, the receiver or video display device that receives the video signal transmitted wirelessly is the terminal used to input the video signal to the transmitter. Regardless of this, the same signal processing is applied to the video signal. That is, for example, the same signal processing is performed on both a component signal having a component terminal as a video signal path and a DVI signal having a DVI terminal as a video signal path.

  Therefore, for example, a noise reduction process that is a signal process performed on a DVI signal that is a digital signal is also applied to a component signal that is an analog signal, and thus noise may not be effectively reduced. there were. That is, there is a problem that the signal processing for the video signal is not optimal.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a video display system, a transmitter, a receiver, and a video display device capable of optimizing signal processing for a video signal. It is in.

The invention according to claim 1 is a video signal output device that outputs a video signal, a transmitter that wirelessly transmits the video signal output by the video signal output device, and the video that is transmitted by the transmitter In a video display system comprising a receiver that receives a signal and a video display device that displays video based on the video signal received by the receiver , the transmitter inputs the video signal to the transmitter. A terminal group composed of an HDMI terminal, a DVI terminal, and a component terminal for transmitting information on a terminal used for inputting the video signal in the terminal group, and receiving the receiver or the video display apparatus, based on the information of the used terminal, a signal processing corresponding to the format of the video signal as a gist that performed on the video signal That.

  According to the present invention, since the receiver or the video display device performs signal processing on the video signal according to the format of the video signal transmitted wirelessly, for example, according to the video signal such as an HDMI signal or a DVI signal. By performing different signal processing, the signal processing for the video signal can be optimized.

According to a second aspect of the present invention, in the video display system according to the first aspect, when the used terminal is the component terminal, the receiver or the video display device has the used terminal The gist of the invention is that the video signal is subjected to noise reduction processing having a higher degree than that of the HDMI terminal or the DVI terminal .

  According to the present invention, when the terminal used to input the video signal to the transmitter is a component terminal, the terminal used to input the video signal to the transmitter is an HDMI terminal or a DVI terminal. Compared to the case, a strong noise reduction process is performed on the video signal. The component signal that uses the component terminal as the video signal path is an analog signal and noise is likely to be mixed in. Therefore, it is possible to effectively reduce the noise mixed in the component signal and optimize the signal processing for the component signal. Can be planned.

According to a third aspect of the present invention, in the video display system according to the first aspect, when the used terminal is the component terminal, the receiver or the video display apparatus has the used terminal as the used terminal. The gist of the invention is that the video signal is subjected to noise reduction processing having a higher degree than that of the HDMI terminal or the DVI terminal .

  According to the present invention, when the terminal used to input the video signal to the transmitter is a component terminal or an HDMI terminal, the terminal used to input the video signal to the transmitter is a DVI terminal. In comparison with the case, signal processing for emphasizing the contour included in the video is performed on the video signal. The component signal that uses the component terminal as the video signal path and the HDMI signal that uses the HDMI terminal as the video signal path are signals that are mainly output from a device such as a DVD player for playback of video. The contour of the object included in the video can be effectively enhanced, and the signal processing for the component signal and the HDMI signal can be optimized.

According to a fourth aspect of the present invention, in the video display system according to any one of the first to third aspects, the receiver or the video display device is configured such that when the terminal used is the DVI terminal. The gist is that the video display device performs signal processing for displaying the video without overscanning the video signal.

  According to the present invention, since the DVI signal using the DVI terminal as the path of the video signal is a signal output from a device for displaying a detailed video such as a PC, the video signal subjected to the above signal processing is used. Based on the above, it is possible to display the video without leaving it to the user of the device for displaying the detailed video.

The invention according to claim 5 is a transmitter that is connected to a video signal output device that outputs a video signal and wirelessly transmits the video signal output by the video signal output device.
A terminal group including an HDMI terminal, a DVI terminal, and a component terminal for inputting the video signal to the transmitter; and a video signal transmitting unit that wirelessly transmits the video signal; The gist of the present invention is to include a signal information communication unit that transmits information of terminals used for inputting a video signal .

  According to this invention, the transmitter includes a signal information communication unit that transmits information related to the path of the video signal input from the video signal output device to the transmitter. For this reason, for example, the receiver receives information on the path of the video signal input from the video signal output device to the transmitter, and the receiver responds to the format of the video signal based on the information on the path of the video signal. Signal processing can be performed on the video signal. As a result, for example, signal processing for video signals can be optimized by performing different signal processing in accordance with video signals such as HDMI signals and DVI signals.

According to a sixth aspect of the present invention, in a receiver that receives the video signal from a transmitter connected to a video signal output device that outputs a video signal, a video signal receiving unit that wirelessly receives the video signal; A signal information communication unit for receiving information of a terminal used for inputting the video signal in a terminal group including an HDMI terminal, a DVI terminal, and a component terminal for inputting the video signal to the transmitter; The gist is to provide.

  According to the present invention, the receiver includes a signal information communication unit that receives information related to the path of the video signal input from the video signal output device to the transmitter. For this reason, for example, a video display device connected to the receiver or the receiver can perform signal processing corresponding to the format of the video signal on the video signal based on information on the path of the video signal. As a result, for example, signal processing for video signals can be optimized by performing different signal processing in accordance with video signals such as HDMI signals and DVI signals.

According to a seventh aspect of the present invention, in the video display device for displaying video based on the video signal received by the receiver , the receiver according to the sixth aspect is provided as the receiver, according to the format of the video signal. The gist is to display a video based on the video signal subjected to the signal processing .

  According to the present invention, since the video display device displays video based on the video signal that has been subjected to signal processing according to the format of the video signal, for example, the video display device is suitable for video signals such as HDMI signals and DVI signals. A video can be displayed based on the video signal subjected to the signal processing.

  According to the present invention, signal processing for a video signal can be optimized by performing different signal processing depending on video signals such as HDMI signals and DVI signals.

The embodiment which actualized this invention is described with reference to FIGS. 1-4.
As shown in FIG. 1, the video display system according to the present embodiment includes a video signal output device 1, a transmitter 2 that wirelessly transmits a video signal output by the video signal output device 1, and a wireless transmission by the transmitter 2. The receiver 3 is configured to receive the video signal transmitted by the receiver 3, and the projection type video display device 4 displays the video based on the video signal received by the receiver 3. As a transmission method of the video signal from the transmitter 2 to the receiver 3, a WHDI (Wireless High Definition Interface) transmission method is used.

  The video signal output device 1 is, for example, a DVD player, a PC (Personal Computer), a broadcast receiver, or the like, and is connected to the transmitter 2 via a cable 5, and the video signal is transmitted to the transmitter 2 via the cable 5. Output. As the cable 5, for example, when the video signal output device 1 is a broadcast receiver that receives a digital broadcast, an HDMI cable that transmits an HDMI (High-Definition Multimedia Interface) signal is used, and the video signal output device 1 is a PC. In some cases, a DVI cable that transmits a DVI (Digital Visual Interface) signal is used. For example, when the video signal output device 1 is a DVD player, a component cable that transmits an analog component signal is used as the cable 5.

  As shown in FIG. 2, the transmitter 2 includes a signal input unit 21 for inputting a video signal to the transmitter 2, a digital signal receiving unit 22 for converting the input video signal into a predetermined digital signal, and an A / A D conversion unit 23, a video signal processing unit 24 that performs video signal processing on the video signal, and a wireless module 25 that outputs the video signal as a radio signal are provided.

  The signal input unit 21 is a terminal group for inputting the video signal output from the video signal output device 1 to the transmitter 2, specifically, an HDMI terminal 21 a to which an HDMI cable can be connected, and a DVI cable Is configured by a DVI terminal 21b to which can be connected and a component terminal 21c to which a component cable can be connected. The digital video signal input to the transmitter 2 via the cable 5 connected to the HDMI terminal 21a or the DVI terminal 21b is input to the digital signal receiving unit 22 and via the cable 5 connected to the component terminal 21c. The analog video signal input to the transmitter 2 is input to the A / D converter 23.

  The digital signal receiving unit 22 inputs a digital video signal input to the transmitter 2 via the HDMI terminal 21a or the DVI terminal 21b by a TMDS (Transition Minimized Differential Signaling) transmission system to the video signal processing unit 24. This is an integrated circuit that converts the format to a digital video signal in a power format. The video signal whose format has been converted by the digital signal receiving unit 22 is input to the video signal processing unit 24.

  The A / D conversion unit 23 converts the analog video signal input to the transmitter 2 via the component terminal 21 c constituting the signal input unit 21 into a digital format that should be input to the video signal processing unit 24. It is an A / D converter that converts video signals. The video signal A / D converted by the A / D converter 23 is input to the video signal processor 24.

  The video signal processing unit 24 is an integrated circuit that performs various signal processing on the video signal input to the transmitter 2 using any one of the HDMI terminal 21a, the DVI terminal 21b, and the component terminal 21c. For example, the video signal processing unit 24 performs signal processing such as synchronization signal processing for processing a synchronization signal included in the video signal and color space conversion processing. The video signal that has been subjected to signal processing by the video signal processing unit 24 is input to the wireless module 25.

  The wireless module 25 as a video signal transmission unit is a transmission module compliant with IEEE802.11a, which is a wireless LAN standard, and is based on an AES (Advanced Encryption Standard) encryption method with a key length of 256 bits. In addition to encrypting the video signal, the video signal is transmitted by radio waves using an RF system compatible with MIMO (Multiple Input Multiple Output) using 5 GHz band using a plurality of antennas. In this way, the transmitter 2 that transmits the video signal can achieve a data transmission rate of up to 1.5 Gbps with a bandwidth of 20 MHz, and can compress a high-definition video signal with a video format of 1080i / 60 Hz without compression. It can be transmitted to the receiver 3.

  The wireless module 25 also serves as a signal information communication unit that transmits information on the path of the video signal input from the video signal output device 1 to the transmitter 2. Information on the path of the video signal (hereinafter, “signal information”) ”), The terminal information used for inputting the video signal to the transmitter 2 is transmitted to the receiver 3.

  In addition to the above components, the transmitter 2 includes an operation unit 26 operated by a user, a control unit 27 that controls each unit of the transmitter 2 based on the operation content of the operation unit 26, and the operation of the transmitter 2. And a display unit 28 for displaying the situation to the user.

  The operation unit 26 is a user interface configured with buttons and the like operated by the user. By operating the operation unit 26, the user can select any of the HDMI terminal 21a, the DVI terminal 21b, and the component terminal 21c as terminals used for inputting a video signal to the transmitter 2, for example. .

  The control unit 27 is a microcomputer or CPU (Central Processing Unit) that operates based on a program stored in the memory, and transmits a control signal, which is a signal for control, to the video signal processing unit 24 and the like. Control each part of the machine 2. The control unit 27 also has information on the terminal used to input the video signal from the video signal output device 1 to the transmitter 2 (ie, the terminal that is the video signal path) as information on the video signal path. Is controlled to be transmitted to the wireless module 25. Information on the terminal that is the path of the video signal (that is, the terminal through which the video signal has passed) is, for example, the operation content of the operation unit 26 that is operated to select the terminal to be used or the transmitter 2. It can be acquired by a signal discrimination circuit (not shown).

  The display unit 28 is configured by a light emitting diode (LED) or the like, and any of the HDMI terminal 21a, the DVI terminal 21b, and the component terminal 21c is selected as a terminal used to input a video signal to the transmitter 2. Is displayed to the user.

  As shown in FIG. 3, the receiver 3 is an extension device connected to the projection display apparatus 4, and receives a radio module 31 that receives a radio signal as a video signal and receives signal information. A video signal processing unit 32 that performs predetermined signal processing on the video signal.

  When the receiver 3 is connected to the projection display apparatus 4, the wireless module 31 is connected to the control unit 50 included in the projection display apparatus 4, and the video signal processing section 32 is connected to the projection display apparatus. The video signal processing unit 47 and the control unit 50 included in the device 4 are connected. As described above, the projection display apparatus 4 includes the wireless module 31 and the image signal processing unit 32 that constitute the receiver 3.

  The wireless module 31 as a video signal receiving unit is a receiving module compliant with IEEE802.11a, and receives a video signal transmitted as a radio wave by the receiver 3 and decrypts an encrypted video signal. To do. The video signal received by the wireless module 31 in this way is input to the video signal processing unit 32.

  The wireless module 31 also serves as a signal information communication unit that receives information (that is, signal information) related to the path of the video signal input from the video signal output device 1 to the transmitter 2, and information related to the path of the video signal. As described above, information on the terminals used for inputting the video signal to the transmitter 2 is received from the transmitter 2. Therefore, the wireless module 25 and the wireless module 31 which are signal information communication units transmit and receive signal information. Information regarding the path of the video signal received by the wireless module 31 is input to the control unit 50.

  The video signal processing unit 32 is an integrated circuit that performs signal processing for converting the video signal received by the wireless module 31 into a video signal to be input to the video signal processing unit 47 included in the projection video display device 4. is there. The video signal subjected to the signal processing by the video signal processing unit 32 is input to the video signal processing unit 47.

  The projection-type image display device 4 is a liquid crystal projector using liquid crystal as a light valve for displaying an image, and a light source 41 composed of an ultrahigh pressure mercury lamp or the like as an optical component for projecting and displaying an image. And a liquid crystal panel 42 that transmits light and generates an image, and a projection lens 43 that magnifies and projects the generated image.

  The liquid crystal panel 42 is a matrix driving type light valve in which pixels are arranged in a matrix. By supplying a driving voltage to the liquid crystal panel 42, the alignment of the liquid crystal between the electrodes changes, and an image is formed on the liquid crystal panel 42. An image is generated when light emitted from the light source 41 passes through the liquid crystal panel 42 on which an image is formed, and the generated image is enlarged and projected on the screen by the projection lens 43 and displayed. Note that the projection display apparatus 4 includes three liquid crystal panels 42 in the case of a so-called three-plate liquid crystal projector. In this case, the light emitted from the light source 41 is decomposed into red, green, and blue light by the dichroic mirror and transmitted through the liquid crystal panel 42 corresponding to each color, and the light transmitted through the three liquid crystal panels 42 is transmitted. A full-color image is generated by the composition.

  In addition to the above-described components, the projection display 4 includes a signal input unit 44 for inputting a video signal to the projection display 4 and a digital for converting the input video signal into a predetermined digital signal. A signal receiving unit 45 and an A / D conversion unit 46, a video signal processing unit 47 for performing video signal processing on the video signal, and a liquid crystal driver 48 are further provided.

  The signal input unit 44 is a group of terminals for directly inputting a video signal to the projection display apparatus 4, and specifically, like the signal input unit 21, an HDMI terminal 44 a to which an HDMI cable can be connected , A DVI terminal 44b to which a DVI cable can be connected and a component terminal 44c to which a component cable can be connected. By providing such a signal input unit 44, the projection display apparatus 4 not only receives a video signal transmitted by the transmitter 2 but also a video signal output apparatus (not shown) directly connected using a cable. Can also input video signals.

  Similarly to the digital signal receiving unit 22, the digital signal receiving unit 45 is a digital signal input to the projection display apparatus 4 via the HDMI terminal 44 a or the DVI terminal 44 b constituting the signal input unit 44 by the TMDS transmission method. This is an integrated circuit for converting the format of a video signal of the format into a digital video signal of a format to be input to the video signal processing unit 47. The video signal whose format has been converted by the digital signal receiving unit 45 is input to the video signal processing unit 47.

  Similar to the A / D conversion unit 23, the A / D conversion unit 46 converts an analog video signal input to the projection display 4 via the component terminal 44 c constituting the signal input unit 44 into a video. This is an A / D converter that converts a digital video signal in a format to be input to the signal processing unit 47. The video signal A / D converted by the A / D converter 46 is input to the video signal processor 47.

  The video signal processing unit 47 performs integration on the video signal input to the projection display 4 using any one of the receiver 3, the HDMI terminal 44a, the DVI terminal 44b, and the component terminal 44c. Circuit. The video signal processing unit 47 is, for example, a sync signal process for processing a sync signal included in the video signal, a process for adjusting the brightness of the video, a process for adjusting the contrast of the video, or a video to be displayed in a rectangle A trapezoidal distortion correction process is performed to correct the image so as not to be displayed as a trapezoid. The video signal subjected to the signal processing by the video signal processing unit 47 is input to the liquid crystal driver 48.

  When a video signal is input to the projection video display device 4 using any one of the HDMI terminal 44a, the DVI terminal 44b, and the component terminal 44c, the video signal processing unit 47 distinguishes these signals, for example, noise Signal processing such as reduction processing or contour correction processing is performed.

  That is, when the terminal used for inputting the video signal to the projection display apparatus 4 is the component terminal 44c, the terminal used for inputting the video signal is the HDMI terminal 44a or the DVI terminal 44b. Compared to the case, the noise reduction processing having a higher degree is applied to the component signal having the component terminal 44c as the path of the video signal.

  Further, when the terminal used for inputting the video signal to the projection display 4 is the HDMI terminal 44a or the component terminal 44c, the terminal used for inputting the video signal is the DVI terminal 44b. In comparison with the case, signal processing for emphasizing the contour of an object included in a video is performed on the HDMI signal or component signal.

  In addition, when the terminal used for inputting the video signal to the projection display apparatus 4 is the DVI terminal 44b, the video signal processing unit 47 causes the projection display apparatus 4 to exceed the DVI signal. Signal processing is performed to display video without scanning.

  The liquid crystal driver 48 is a circuit for driving the liquid crystal panel 42 based on the video signal. The liquid crystal driver 48 is provided with a driving voltage for driving the liquid crystal panel 42 according to the video signal. Is supplied to the electrodes corresponding to the pixels constituting the image.

  The operation unit 49 is a user interface configured with buttons and the like operated by the user. Which of the receiver 3, the HDMI terminal 21 a, the DVI terminal 21 b, and the component terminal 21 c is used by the user by operating the operation unit 49 to input a video signal to the projection display apparatus 4, for example. Can be selected.

  Like the control unit 27, the control unit 50 is a microcomputer or CPU that operates based on a program stored in the memory, and outputs a control signal to the wireless module 31, the video signal processing unit 32, the video signal processing unit 47, and the like. By doing so, each part which comprises the receiver 3 and the projection type video display apparatus 4 is controlled. For example, the control unit 50 determines the video signal based on the information on the path of the video signal input from the video signal output device 1 to the transmitter 2 (that is, the terminal constituting the signal input unit 21 through which the video signal passes). A control signal for performing signal processing according to the format is output to the video signal processing unit 47 and controlled.

  In this embodiment, since the video signal processing unit 47 performs signal processing based on the control signal output from the control unit 50, the projection display 4 displays information on the path of the video signal. Based on this, the video signal is subjected to signal processing according to the format of the video signal transmitted wirelessly.

  Specifically, when a video signal is input to the projection video display device 4 using the receiver 3, the projection video display device 4 causes the video signal processing unit 47 to generate noise according to the format of the video signal. Signal processing such as reduction processing or contour correction processing is performed.

  That is, when the terminal used for inputting the video signal to the transmitter 2 is the component terminal 21c, the terminal used for inputting the video signal is the HDMI terminal 21a or the DVI terminal 21b. Then, a strong noise reduction process is performed on the component signal having the component terminal 21c as the path of the video signal.

  Further, when the terminal used to input the video signal to the transmitter 2 is the HDMI terminal 21a or the component terminal 21c, compared to when the terminal used to input the video signal is the DVI terminal 21b. The signal processing for emphasizing the contour of the object included in the video is performed on the HDMI signal or component signal.

  Further, the video signal processing unit 47 allows the projection video display device 4 to overscan the DVI signal when the terminal used to input the video signal to the transmitter 2 is the DVI terminal 21b. The signal processing for displaying the video is performed.

  In this manner, the projection display apparatus 4 performs different signal processing by the video signal processing unit 47 as shown in FIG. 4 according to the video signal of the HDMI signal, DVI signal, or component signal. That is, signal processing corresponding to the format is performed on the video signal transmitted wirelessly.

According to the present embodiment, the following effects can be achieved.
(1) Since the projection type video display device 4 performs signal processing on the video signal according to the format of the video signal transmitted wirelessly, it differs depending on the video signal of the HDMI signal, the DVI signal, or the component signal. By performing the signal processing, the signal processing for the video signal can be optimized.

  (2) The transmitter 2 transmits information on the path of the video signal input from the video signal output device 1 to the transmitter 2 to the receiver 3, and the receiver 3 receives the information on the path of the video signal, The projection display apparatus 4 performs signal processing on the video signal according to the format of the video signal based on the information on the path of the video signal. Therefore, according to the HDMI signal that uses the HDMI terminal 21a as the video signal path, the DVI signal that uses the DVI terminal 21b as the video signal path, and the video signal of the component signal that uses the component terminal 21c as the video signal path, By performing different signal processing, the signal processing for the video signal can be optimized.

  (3) The transmitter 2 includes a signal input unit 21 including an HDMI terminal 21a, a DVI terminal 21b, and a component terminal 21c for inputting a video signal to the transmitter 2, and information on the path of the video signal is as follows. Information on the terminal used to input the video signal is transmitted. For this reason, the receiver 3 can receive the information of the terminal used for inputting the video signal to the transmitter 2. Then, the projection display apparatus 4 can perform signal processing corresponding to the format of the video signal on the video signal based on the information on the used terminals.

  (4) When the terminal used for inputting the video signal from the video signal output device 1 to the transmitter 2 is the component terminal 21c, the projection video display device 4 inputs the video signal to the transmitter 2. Therefore, compared with the case where the terminal used for this purpose is the HDMI terminal 21a or the DVI terminal 21b, a noise reduction process having a higher degree is applied to the video signal. For this reason, the component signal having the component terminal 21c as the path of the video signal is an analog signal and noise is likely to be mixed therein. Therefore, noise mixed in the component signal can be effectively reduced, and signal processing for the component signal is performed. Can be optimized.

  (5) When the terminal used to input the video signal from the video signal output device 1 to the transmitter 2 is the component terminal 21c or the HDMI terminal 21a, the projection video display device 4 sends video to the transmitter 2. Compared with the case where the terminal used for inputting the signal is the DVI terminal 21b, signal processing for emphasizing the contour included in the video is performed on the video signal. The component signal that uses the component terminal 21c as the path of the video signal and the HDMI signal that uses the HDMI terminal 21a as the path of the video signal are signals that are mainly output from a device such as a DVD player or a broadcast receiver for playing back moving images. is there. For this reason, it is possible to effectively enhance the contour of the object included in the moving image, and to optimize the signal processing for the component signal and the HDMI signal.

  (6) When the terminal used for inputting the video signal from the video signal output device 1 to the transmitter 2 is the DVI terminal 21b, the projection video display device 4 is overscanned. The video signal is subjected to signal processing for displaying the video without doing so. The DVI signal that uses the DVI terminal 21b as a video signal path is a signal that is output from a device such as a PC for displaying a detailed video. Therefore, based on the video signal that has been subjected to the above signal processing, It is possible to display the video without leaving it to the user of the device for displaying the video.

  (7) The transmitter 2 according to the present embodiment includes a wireless module 25 that transmits a video signal wirelessly and transmits information related to a path of the video signal input from the video signal output device 1 to the transmitter 2. Yes. Therefore, the receiver 3 receives information on the path of the video signal input from the video signal output apparatus 1 to the transmitter 2, and the projection video display apparatus 4 connected to the receiver 3 receives the path of the video signal. On the basis of the information on the signal, signal processing corresponding to the format of the video signal can be performed on the video signal. As a result, signal processing for the video signal can be optimized by performing different signal processing according to the HDMI signal, the DVI signal, and the component video signal.

  (8) The receiver 3 according to the present embodiment includes a wireless module 31 that receives a video signal wirelessly and receives information about the path of the video signal input from the video signal output device 1 to the transmitter 2. Yes. For this reason, the projection display apparatus 4 connected to the receiver 3 can perform signal processing corresponding to the format of the video signal on the video signal based on the information on the path of the video signal. As a result, signal processing for the video signal can be optimized by performing different signal processing according to the HDMI signal, the DVI signal, and the component video signal.

  (9) The projection display apparatus 4 according to the present embodiment includes the receiver 3 and displays an image based on the image signal that has been subjected to signal processing in accordance with the format of the image signal. Further, by performing different signal processing according to the video signal of the component signal, it is possible to optimize the signal processing for the video signal.

  (10) In this embodiment, the video signal processing unit 47 provided in the projection display apparatus 4 performs signal processing corresponding to the format of the video signal on the video signal. For this reason, since the transmitter 2 and the receiver 3 do not need a circuit for performing the signal processing according to the format of the video signal, it is possible to prevent an increase in manufacturing cost.

(Other embodiments)
The present invention is not limited to the above embodiment, and various design changes can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention. For example, the present invention can be changed and implemented as shown below.

  In the above embodiment, the receiver 3 is an extension device of the projection display apparatus 4 and the projection display apparatus 4 includes the receiver 3. However, the projection display apparatus 4 and the receiver 3 are used. May be separate electronic devices connected via a cable.

  In the embodiment described above, the projection video display device 4 performs signal processing on the video signal in accordance with the format of the video signal transmitted wirelessly. However, the receiver 3 is, for example, the video signal processing unit 32. Thus, the video signal may be subjected to signal processing corresponding to the format of the video signal.

  In the above embodiment, one wireless module 25 is provided as the video signal transmission unit and the signal information communication unit. However, these are configured by separate communication modules so that the video signal transmission unit and the signal information communication unit are provided. It may be. Similarly, the single wireless module 31 is provided as the video signal receiving unit and the signal information communication unit, but these are configured by separate communication modules so that the video signal receiving unit and the signal information communication unit are provided. Also good.

  In the above embodiment, the terminals serving as the video signal path are the HDMI terminal, the DVI terminal, and the component terminal, but the transmitter 2 may include terminals other than these terminals (for example, the RCA terminal).

  In the above embodiment, the transmitter 2 transmits information on a terminal used for inputting a video signal to the transmitter 2 (that is, a terminal through which the video signal passes). The information regarding the path of the video signal input from 1 to the transmitter 2 is not limited to the information on the terminal used.

  In the above embodiment, as signal processing corresponding to the format of the video signal, noise reduction processing, processing for correcting contours, and signal processing for displaying video without overscanning have been described as examples. Other signal processing may be performed according to the format of the video signal.

  In the above-described embodiment, the video display device is a projection-type video display device that projects and displays a video. However, the video display device such as a liquid crystal television can be applied in a manner according to the above-described embodiment. .

1 is a block diagram showing a configuration of a video display system according to an embodiment of the present invention. The block diagram which shows the structure of the transmitting apparatus which concerns on this embodiment. The block diagram which shows the structure of the receiver and video display apparatus which concern on this embodiment. The table | surface which shows relationships, such as a signal processing according to a video signal, the terminal used as the path | route of a video signal, and a video signal.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Video signal output device, 2 ... Transmitter, 3 ... Receiver, 4 ... Projection type video display device, 5 ... Cable, 21 ... Signal input part, 21a ... HDMI terminal, 21b ... DVI terminal, 21c ... Component terminal, DESCRIPTION OF SYMBOLS 22 ... Digital signal receiving part, 23 ... A / D conversion part, 24 ... Video signal processing part, 25 ... Wireless module (video signal transmission part, signal information communication part), 26 ... Operation part, 27 ... Control part, 28 ... Display unit 31 ... Wireless module (video signal receiving unit, signal information communication unit) 32 ... Video signal processing unit 41 ... Light source 42 ... Liquid crystal panel 43 ... Projection lens 44 ... Signal input unit 44a ... HDMI terminal 44b ... DVI terminal, 44c ... component terminal, 45 ... digital signal receiving unit, 46 ... A / D conversion unit, 47 ... video signal processing unit, 48 ... liquid crystal driver, 49 ... operation unit, 50 ... control unit

Claims (7)

A video signal output device that outputs a video signal; a transmitter that wirelessly transmits the video signal output by the video signal output device; a receiver that receives the video signal transmitted by the transmitter; In a video display system comprising a video display device that displays video based on the video signal received by a receiver ,
The transmitter includes a terminal group including an HDMI terminal, a DVI terminal, and a component terminal for inputting the video signal to the transmitter, and is used for inputting the video signal in the terminal group. The terminal information
The video display system, wherein the receiver or the video display device performs signal processing on the video signal according to a format of the video signal based on information of the used terminal . The video display system according to claim 1,
When the used terminal is the component terminal, the receiver or the video display device performs a noise reduction process having a higher degree than when the used terminal is the HDMI terminal or the DVI terminal. A video display system characterized by being applied to the video signal. The video display system according to claim 1 or 2 ,
In the receiver or the video display device, when the used terminal is the component terminal or the HDMI terminal, the contour included in the video is compared with when the used terminal is the DVI terminal. A video display system , wherein signal processing for emphasis is performed on the video signal. In the video display system according to any one of claims 1 to 3 ,
When the used terminal is the DVI terminal, the receiver or the video display device performs signal processing for displaying the video without overscanning the video signal with respect to the video signal. A video display system characterized by the application. In a transmitter that is connected to a video signal output device that outputs a video signal and that wirelessly transmits the video signal output by the video signal output device,
  A terminal group including an HDMI terminal, a DVI terminal, and a component terminal for inputting the video signal to the transmitter; and a video signal transmitting unit that wirelessly transmits the video signal; A signal information communication unit that transmits information on terminals used for inputting video signals.
  A transmitter characterized by that. In the receiver that receives the video signal from the transmitter connected to the video signal output device that outputs the video signal,
  In order to input the video signal out of a terminal group including a video signal receiving unit that wirelessly receives the video signal, and an HDMI terminal, a DVI terminal, and a component terminal for inputting the video signal to the transmitter A signal information communication unit for receiving information on the terminals used
  A receiver characterized by that. In a video display device that displays video based on a video signal received by a receiver,
  The receiver according to claim 6 is provided as the receiver, and an image is displayed based on the video signal that has been subjected to signal processing according to a format of the video signal.
  A video display device characterized by that.

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