JP3785010B2 - Receiving device, display device and video / audio receiving system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention can separate a tuner unit and a monitor unit in a television receiver.Audiovisual reception systemRelated to. As the monitor unit, it is particularly preferable to use a thin flat display device such as a plasma display or an EL display in addition to a liquid crystal display.
[0002]
[Prior art]
In recent years, LCD monitors characterized by space-saving and power-saving along with their price drop have been rapidly spreading as desktop computer monitors on the desktop, establishing their position as a display device after CRT, and the CRT monitor market It is the momentum to swallow.
For general consumers, liquid crystal monitors have become familiar products, and not only as monitors for PCs, but also as TV receivers that take advantage of their styles.
[0003]
[Problems to be solved by the invention]
In general, a television receiver has an antenna input terminal on the back surface or the like, and is mostly connected to the antenna terminal on the wall of the house with a coaxial cable. Conventional CRT television receivers are heavy and do not move frequently, and are often left at the corners of the walls or rooms.
[0004]
On the other hand, LCD TVs are much thinner and lighter than CRTs, so they can be mounted on a wall or mounted on a stand for freedom of installation. If the coaxial cable for the antenna is routed to such a liquid crystal television, the good installation property is lost. Moreover, since the interior property like the forehead of a picture is also impaired, there is a demand for not connecting a wire such as a cord as much as possible.
[0005]
In response to such a demand, for example, there is a video and audio wireless transmission system in a format in which a composite signal and a stereo audio signal are transmitted wirelessly. The above system inputs composite signals and stereo audio signals to the transmitter, and sends video and audio to a liquid crystal television located a few meters away. Is. Of course, there is a receiver corresponding to the transmitter on the liquid crystal television side.
[0006]
However, in order to receive broadcast waves and watch a program in this system, it is necessary to use a tuner unit built in the liquid crystal television main body, and eventually the antenna line is drawn to the liquid crystal television main body. Of course, if a video deck placed in a rack or the like has a built-in tuner, the video and audio selected by that tuner can be input to the transmitter and transmitted wirelessly. Since it is necessary to operate the video deck itself, such as using a remote control, it is not always easy to use.
[0007]
  The purpose of the present invention is to,Installation by routing the antenna wireReceiver, display device, and video / audio reception system using themIs to provide.
[0008]
[Means for Solving the Problems]
  The present invention has been made in view of the above problems. The tuner unit and the monitor unit of the television receiver areFor receiver and displayIsolated and isolatedReceiverA wireless transmission unit is installed in theDisplay deviceThe video and audio are played back wirelessly. Also,ReceiverWhenWith display deviceControl data was exchanged between the two so as to eliminate the difference in operating state between the two.At that time, the selected video and audio and the control data are multiplexed on the same channel, and transmission and reception are performed between the receiving device and the display device.This makes it easy to use without compromising the installation and interior characteristics of the antenna wire.Audiovisual reception systemCan be realized.
[0009]
  In more detail,the aboveTo achieve the purpose,For example, in a receiving device, a data input for receiving, in a wireless form, a receiving unit that receives a broadcast wave including a video signal and an audio signal, and control data for controlling the video signal and the audio signal received by the receiving unit. A video / audio signal output unit that converts the video signal and audio signal received by the reception unit so that the video signal and the audio signal can be transmitted wirelessly, and outputs the video signal by the video / audio signal output unit. And a control unit that controls to output the response data for responding to the control data input by the data input unit together with the video signal and the audio signal when outputting the audio signal. .
[0010]
  In order to achieve the above object, for example, in a display device, data including a video signal, an audio signal, and control data for controlling the video signal and the audio signal transmitted from the receiving device are wirelessly transmitted. A first input unit that is input in the form of: a separation unit that separates data input to the first input unit into a video signal, an audio signal, and control data; and a video signal that is separated by the separation unit; A configuration including a display reproduction unit that displays and reproduces an audio signal, and a control unit that controls the display reproduction unit to display and reproduce a video signal and an audio signal based on the control data separated by the separation unit And
[0011]
  In order to achieve the above object, for example, in a video / audio reception system having a reception device and a display device, the reception device includes a reception unit that receives a broadcast wave including a video signal and an audio signal, and the reception unit. A data input unit for inputting control data for controlling the received video signal and audio signal in a wireless form, and a video signal and an audio signal received by the receiving unit can be transmitted in a wireless form Video / audio signal output unit that outputs after conversion processing, and response data for responding to control data input by the data input unit when the video / audio signal output unit outputs the video signal and audio signal And a control unit that controls the video signal and the audio signal to be mixed and output. In addition, the display device includes a first input unit that inputs, in a wireless form, data in which video signals, audio signals, and response data transmitted from the receiving device are mixed, and data that is input to the first input unit. Is separated into a video signal, an audio signal and response data, a display reproduction unit for displaying and reproducing the video signal and the audio signal separated by the separation unit, and the display reproduction unit by the separation unit And a control unit that controls to display and reproduce the video signal and the audio signal based on the separated response data.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings using some examples.
FIG. 1 is a schematic view showing a first embodiment of a video and audio reproducing apparatus according to the present invention. In the figure, 1 is a tuner unit, 2 is a monitor unit, 3 and 4 are light emitting and receiving units, 5 is a remote control, 6 is a signal source such as a VTR and DVD, and 7 is an antenna.
[0019]
A specific example of the internal configuration will be described later. First, an overall schematic operation will be described with reference to FIG.
In the figure, the broadcast wave received by the antenna 7 is sent to the tuner unit 1 and a predetermined channel is selected. The video signal and audio signal of the selected channel are transmitted as light signals by the light emitting / receiving unit 3. This optical signal may be visible light or invisible light, but here it will be described on the assumption of commonly used infrared light.
The transmitted video and audio optical signals are received by the light emitting / receiving unit 4 and reproduced by the monitor unit 2 and a speaker (not shown). In addition to the one-way transmission of video and audio signals between the tuner unit 1 and the monitor unit 2, the operation data of the tuner unit 1 and the monitor unit 2 can be mutually confirmed by exchanging control data between them. ing. Since this mutual confirmation function is provided, for example, when a channel switching instruction is issued from the remote controller 5 to the monitor unit 2, the switching instruction is transmitted to the tuner unit 1. This is transmitted to the monitor unit 2, and the channel number can be displayed on the OSD of the monitor unit 2, for example, the channel number can be displayed on the screen of the monitor unit 2 as shown in the figure.
[0020]
The flow of time and the operating state of each part will be described with reference to FIG.
FIG. 2 is a flowchart showing a normal processing flow of the remote controller, the monitor unit, and the tuner unit. In the figure, when the remote controller 5 generates a channel switching request, the monitor unit 2 that has received the request transmits a channel switching request to the tuner unit 1 and waits for an answer after undergoing retransmission processing. Here, the retransmission process refers to a process of amplifying a signal from a remote controller, for example, and taking an envelope of the remote controller signal through a band pass filter. The tuner unit 1 receives a channel switching request, specifically performs a channel switching process, and replies to the monitor unit 2 that it has been completed normally. The monitor unit 2 is waiting for an answer, and when the answer from the tuner unit 1 arrives, the channel after channel selection is displayed by OSD display.
[0021]
FIG. 3 is a flowchart showing a processing flow when the line is disconnected between the monitor unit and the tuner unit in the processing flow of the remote controller, the monitor unit, and the tuner unit. When the line is disconnected between the monitor unit 2 and the tuner unit 1, the channel request from the monitor unit 2 is not transmitted to the tuner unit 1, so that the normal end response does not return to the monitor unit 2. If there is no answer even after waiting for a reply for a certain period of time, the monitor unit 2 determines that the channel cannot be switched as a time-out and does not perform OSD display or the like, or displays on the monitor unit 2 that the channel cannot be switched. To do.
As described above, in this embodiment, in addition to the one-way transmission of video and audio signals, control data can be exchanged between the two, so that the tuner-separated type has the same usability as the integrated type. Can be realized.
[0022]
Hereinafter, a specific configuration example of the tuner unit will be described with reference to FIG. 4, and a specific configuration example of the monitor unit will be described with reference to FIG.
FIG. 4 is a block diagram showing a first embodiment of the tuner unit according to the present invention. In the figure, an antenna 7 and a signal source 6 are connected to the tuner unit 101. In the tuner section, 10 is a tuner, 11 is a video detection circuit, 12 is an audio detection circuit, 13 is an audio multiplex demodulation circuit, 14 is a switching circuit, 15 is a control circuit, 16 to 18 are modulation circuits, 19 is an addition circuit, 20 Is a light emitting means, 21 is a light receiving means, 22 is a filter circuit, and 23 is a demodulation circuit.
[0023]
The broadcast received by the antenna 7 is channel-selected by the tuner 10, and the intermediate frequency is sent to the video detection circuit 11 and the audio detection circuit 12. The video detection circuit 11 detects and outputs a composite video signal from the input intermediate frequency and inputs it to the switching circuit 14. The voice detection circuit 12 detects and outputs a voice signal from the inputted intermediate frequency, and inputs it to the switching circuit 14 via the voice multiplex demodulation circuit 13. The sound multiplex demodulation circuit 13 outputs stereo sound and the like. The switching circuit 14 switches between the video / audio system signal input from the antenna 7 and the video / audio input from the signal source 6 connected to the outside of the tuner unit 101. The switching control signal is input from the control circuit 15. The control circuit 15 can be constituted by a microcomputer, and in addition to the switching control of the switching circuit 14, performs tuning control by the tuner 10, demodulation instruction by the sound multiplex demodulation circuit, and the like.
[0024]
The video signal switched by the switching circuit 14 is modulated by the modulation circuit 16, and the audio signal is modulated by the modulation circuit 17 and input to the addition circuit 19. The modulation circuit 16 and the modulation circuit 17 may be FM-modulated in accordance with, for example, “Infrared spatial analog video transmission system” EIAJ CP-1207 and “Infrared spatial analog audio transmission system” EIAJ CP-1206 of the Japan Electronic Machinery Manufacturers Association standard.
In addition, the subcarrier frequency allocation may use the frequency determined in the same manner as the “Electronic Subcarrier Frequency Allocation of Infrared Spatial Transmission System” EIAJ CP-1205 of the Japan Electronic Machinery Manufacturers Association standard. Incidentally, the frequency allocation is as shown in FIG. 6 described later, and the video signal is determined to be band V and the audio signal is determined to be band IV.
[0025]
On the other hand, the modulation circuit 18 modulates the data signal from the control circuit 15 and inputs it to the addition circuit 19. The adder circuit 19 adds the outputs of the modulation circuits 16 to 18 and inputs them to the light emitting means 20. The light emitting means 20 may be a light emitting diode or the like, and an optical signal whose luminance is modulated by the output of the adding circuit 19 is radiated to the space. Of course, it goes without saying that video, audio and data signals are multiplexed on this optical signal.
[0026]
FIG. 5 is a block diagram showing a second embodiment of the monitor unit according to the present invention. In the monitor unit 102 of FIG. 5, 30 is a light receiving means, 31 to 33 are filter circuits, 34 to 36 are demodulation circuits, 37 is a video processing circuit, 38 is a video synthesis circuit, 39 is an OSD generation circuit, 40 is a display unit, 41 is an audio processing circuit, 42 is a speaker, 43 is a light receiving means, 44 is a filter circuit, 45 is a demodulation circuit, 46 is a control circuit, 47 is a modulation circuit, and 48 is a light emitting means. Reference numeral 50 denotes a remote controller.
[0027]
In the monitor unit 102, the light receiving means 30 receives the multiplexed signals of the video, audio and data systems, and the filter circuits 31 to 33 respectively separate the video system, the audio system and the data system and demodulate the respective demodulation circuits 34 to 36. To enter. The demodulating circuit 34 demodulates the FM modulated video signal corresponding to the modulating circuit 16 and outputs the video signal. The demodulating circuit 35 demodulates the audio signal that has been FM-modulated corresponding to the modulating circuit 17 and outputs the audio signal. The demodulation circuit 36 demodulates the data signal corresponding to the modulation circuit 18 and outputs the data signal.
[0028]
The video signal output from the demodulation circuit 34 is subjected to signal processing for display on the display unit 40 in the video processing circuit. Although not shown, for example, the composite signal is separated into a luminance signal and a color signal, further color-demodulated by a video chroma decoder circuit, converted into an RGB primary color signal, and subjected to enlargement processing in accordance with the display resolution of the display unit. A series of these processes is a general process in a cathode ray tube receiver.
The output of the video processing circuit 37 is synthesized with the OSD signal generated by the OSD generation circuit 39 by the video synthesis circuit 38 and input to the display unit 40. The OSD display is a function that displays a channel number on the screen, and is a generalization.
[0029]
The audio processing circuit 41 is a block that controls the amplification degree, right / left balance, sound quality adjustment, and the like of the audio signal from the demodulation circuit 35, and drives the speaker system 42 by this output.
The control circuit 46 controls the video processing circuit 37, the audio processing circuit 41, and the OSD generation circuit 39. For example, the video processing circuit 37 is instructed to adjust the contrast, brightness, hue, or saturation of the video signal. The sound processing circuit 41 is instructed to adjust the volume, left / right balance, and sound quality. An OSD generation content is instructed to the OSD generation circuit 39. The control circuit 46 may be constituted by a microcomputer.
[0030]
Needless to say, the user views the video of the display unit 40 and the sound of the speaker system 42.
[0031]
On the other hand, the signal from the remote controller 50 is received by the light receiving means 43, and the output is filtered by the filter circuit 44 only in the frequency band corresponding to the subcarrier frequency of the remote controller 50, and the data signal is reproduced by the demodulation circuit 45. The reproduced data is interpreted by the control circuit 46 and an instruction from the remote controller 50 is executed. The instruction from the remote controller 50 is, for example, volume adjustment or contrast adjustment, and the instructions may be issued to the video processing circuit 37 and the audio processing circuit 41 in the manner described above.
The control circuit 46 can emit data to the tuner unit 101 via the modulation circuit 47 and the light emitting means 48, and is an upstream control data line from the monitor unit 102 to the tuner unit 101.
An example of the frequency distribution of the video signal, the audio signal, the downstream data signal emitted by the light emitting means 20 and the upstream data signal emitted by the light emitting means 48 will be described with reference to FIGS.
[0032]
FIG. 6 is a characteristic diagram showing an example of frequency allocation of subcarriers, and FIG. 7 is a characteristic diagram showing another example of frequency allocation of subcarriers. The horizontal axis indicates the subcarrier frequency (Hz).
6 and 7, it is common to use band V for video, band IV for audio, and band I for the remote controller 50, and only the allocation of upstream data and downstream data is different. Here, in FIG. 1, uplink data is data transmitted from the monitor unit 2 to the tuner unit 1, and downlink data is data transmitted from the tuner unit 1 to the monitor unit 2.
[0033]
In FIG. 6, uplink data and downlink data are assigned to band III. High-speed data transmission is possible, and there is an advantage that interference with the subcarrier frequency of the mobile computer 50 is difficult. However, since it is close to the frequency band of video and audio, it is necessary to sufficiently suppress spurious data signals.
In FIG. 7, uplink data and downlink data are assigned to band I. In this case, it is necessary to devise code allocation so that interference with the subcarrier frequency of the remote controller 50 does not occur, but the modem device may be a general-purpose product used in the existing remote controller and can be realized at low cost.
[0034]
As described above, an antenna line is connected to the separated tuner unit 101 for channel selection, the selected video / audio is wirelessly transmitted, and the monitor unit 102 receives and reproduces the video / audio. In addition, an easy-to-use liquid crystal television can be realized without impairing the installation property and intelligence due to the routing of the antenna wire.
In addition, by exchanging control data between the tuner unit 101 and the monitor unit 102, it is possible to eliminate the difference between the operation states of both.
[0035]
Hereinafter, a second embodiment of the video and audio reproducing apparatus according to the present invention will be described with reference to FIGS.
FIG. 8 is a block diagram showing a second embodiment of the tuner unit according to the present invention.
8 includes a video signal generation circuit 51, a data synthesis circuit 52, a video signal detection circuit 53, and a control circuit 115. The same blocks as those in FIG.
[0036]
The feature of the present embodiment is that the downlink data is transmitted while being superimposed on the video signal blanking period. This point will be mainly described, and the description regarding the contents described in FIG. 4 will be omitted.
8 synthesizes the video signal switched by the switching circuit 114 and the control data from the control circuit 115. In the modulation circuit 16, the video signal and the control data superimposed on the video signal are subjected to video FM modulation. The audio signal FM-modulated by the modulation circuit 17 and the output of the modulation circuit 16 are added by the adding circuit 119 and radiated to the space by the light emitting means 20. As described above, the downlink data is modulated together with the video signal after being superimposed on the video signal, rather than modulating the data itself as shown in FIG.
[0037]
FIG. 10 shows a circuit configuration example of the data synthesis circuit 52, which will be described.
FIG. 10 is a block diagram showing an embodiment of the data synthesis circuit.
In the figure, 60 is a clamp circuit, 61 is a reference power supply, 62 and 63 are switching circuits, 64 is a reference power supply, 65 is a sync separation circuit, 66 is a control circuit, 67 is a PLL circuit, 68 is an AND circuit, 69 is a parallel / This is a serial (P / S) conversion circuit.
[0038]
The video signal applied to the terminal 80 is input to the clamp circuit 60 and the sync separation circuit 65. The clamp circuit 60 is a circuit that performs direct current reproduction of the video signal, and the video signal clamp level is the value of the reference power supply 61. Clamping is performed at the timing of the clamp signal from the control circuit 66.
The control circuit 66 receives the horizontal synchronization signal H and the vertical synchronization signal V separated from the video signal by the synchronization separation circuit 65, and the clock signal generated by multiplying the horizontal synchronization signal by the PLL circuit, and the clamp signal described above. In addition, a data load signal (denoted as an LD signal) and a gate signal (denoted as a Gate signal) for the P / S circuit 69 are generated.
[0039]
For easy understanding, description will be made with reference to the timing chart of FIG.
FIG. 12 is a signal waveform diagram for explaining the superposition and separation of data from the video signal. FIG. 12 (a) is a signal waveform diagram of the tuner section, and 12 (b) is a signal waveform chart of the monitor section.
In FIG. 12A, (1) is an output signal waveform diagram of the clamp circuit 60, 251 is a horizontal synchronizing signal, and 252 is a video signal. (2) is an LD signal 253 output from the control circuit 66, and the P / S circuit 69 is latched at the timing of the LD signal 253. (3) is a Gate signal 254 output from the control circuit 66. The Gate signal 254 is supplied to the switching circuit 62 and supplies a clock signal to the P / S circuit 69 during the period of the Gate signal 254. (4) shows the internal signal state of the P / S circuit 69. The state of the P / S circuit 69 is switched by the LD signal 253, and the data is changed from parallel to serial by the clock signal during the period of the Gate signal 254. Is converted to (5) is an output signal of the P / S circuit 69, which is data 255 converted to a serial signal. (5) is an output signal of the data synthesis circuit 52, that is, a signal of the terminal 81. In this signal, a part of the output signal of the clamp circuit 60 shown in (1) is replaced with a Gate signal 254, and serially converted data 255 is superimposed on this part.
[0040]
More specifically, what corresponds to the output of the clamp circuit 60 of FIG. 10 is the (1) clamp output waveform of FIG. While the Gate signal 254 is L (low), the switching circuit 62 is connected to the output terminal L of the clamp circuit 60. When the Gate signal 254 is H, the switching circuit 62 is connected to the terminal H, and the reference power supply 61 Voltage is output. This is to prevent any signal or noise from being mixed in a portion where data is superimposed in the output of the clamp circuit 60.
[0041]
Data is latched in the P / S circuit 69 at the LD signal timing, and the data latched during the period when the Gate signal is “H” is converted into serial data and output. The switching circuit 63 is repeatedly turned on and off by the serial data output from the P / S circuit 69. The period in which the switching circuit 63 is repeatedly turned on and off is only the period in which the Gate signal is “H (high)”. Accordingly, data is superimposed at the position of line number 17 as in the data synthesis output waveform of (1) in FIG.
[0042]
As described above, the data can be superimposed on the video signal by the data synthesizing circuit 52 shown in FIGS.
If the video signal is not input to the data synthesis circuit 52, data superimposition becomes impossible. If there is no video signal, the video signal generation circuit 51 is selected by the switching circuit 114 and the video is forced. A signal is input to the data synthesis circuit 52.
The presence or absence of the video signal may be performed by the video signal detection circuit 53 and the determination result may be input to the control circuit 115. Although not shown, the video signal detection circuit 53 may use, for example, a synchronization separation circuit, and may integrate the separated horizontal synchronization signal H and determine whether or not the integration result is a certain value or more.
[0043]
Next, the monitor unit 202 in FIG. 9 will be described.
FIG. 9 is a block diagram showing a second embodiment of the monitor unit according to the present invention. In FIG. 9, the monitor unit 202 includes a data separation circuit 54, a synchronization separation circuit 55, and a control circuit 146. In addition, the same number is attached | subjected to the same block as FIG.
In FIG. 5, the video signal on which data is superimposed is output from the demodulation circuit 34, and the data superimposed on the video signal is separated by the data separation circuit 54 and input to the control circuit 146. In FIG. 9, the description of the contents of the blocks described in FIG. 5 is omitted.
[0044]
Next, a circuit configuration example of the data separation circuit will be described with reference to FIG.
FIG. 11 is a block diagram showing an embodiment of the data separation circuit. In FIG. 11, 70 is a clamp circuit, 71 is a reference power supply, 72 is a comparison circuit, 73 is a comparison power supply, 74 is a synchronous separation circuit, 75 is a control circuit, 76 is a PLL circuit, 77 is an AND circuit, and 78 is a switching circuit. is there.
[0045]
The video signal on which the data applied to the terminal 82 is superimposed is input to the clamp circuit 70 and the synchronization separation circuit 74. The clamp circuit 70 is a circuit that performs direct current reproduction of the video signal, and the clamp level of the video signal becomes the value of the reference power supply 71. The clamp circuit 70 is clamped at the timing of the clamp signal from the control circuit 75.
The control circuit 75 receives a horizontal synchronization signal H and a vertical synchronization signal V separated from the video signal by the synchronization separation circuit 74 and a clock signal generated by multiplying the horizontal synchronization signal by the PLL circuit 76. The control circuit 75 generates a gate signal (referred to as a Gate signal) for the switching circuit 78 in addition to the clamp signal described above. The output of the clamp circuit 70 is input to the comparison circuit 72 and binarized using the level of the comparison power supply 73 as a threshold value. For ease of understanding, description will be made with reference to the waveform diagram of FIG.
[0046]
In FIG. 12B, (1) is an output waveform of the clamp circuit 70, and data 255 is superimposed on the video signal. (2) is an output waveform of the comparison circuit 72. The output waveform of the clamp circuit 70 is binarized using the power supply of the comparison power supply 73 as a threshold value, and includes a video signal 252 and data 255. Yes. (3) is a Gate signal 256, which is supplied to the switching circuit 78. (4) is data 255 extracted to the terminal 83.
The output waveform of the comparison circuit 72 shown in (2) is input to one end H of the switching circuit 78. The Gate signal 256 of the control circuit 75 shown in (3) switches the switching circuit 78 to the terminal L when this signal is L (low), and switches the switching circuit 78 to the terminal H when this signal is H (high). Therefore, the output of the switching circuit 78 becomes the output of the comparison circuit 72 while the Gate signal is “H (high)”, and the data 255 shown in (4) is separated and outputted to the terminal 83.
In this way, the data 255 superimposed on the video signal can be separated by the data separation circuit 54. The output of the data separation circuit 54 is input to the control circuit 146, and the data content is interpreted.
[0047]
Next, frequency distribution examples of the video signal, audio signal, downstream data signal emitted by the light emitting means 20 and the upstream data signal emitted by the light emitting means 48 in the second embodiment are used with reference to FIGS. I will explain.
13 to 15 are characteristic diagrams showing still another embodiment of subcarrier frequency allocation. The horizontal axis indicates the subcarrier frequency (Hz).
13-15, it is common to use the band V for the data-superimposed video, the band IV for the audio, and the band I for the remote control, and only the uplink data allocation is different. In FIG. 13, the uplink data is assigned to band III, and the downlink data is superimposed on the video signal and assigned to band V. With this frequency allocation, high-speed data transmission is possible, and there is an advantage that interference with the subcarrier of the remote controller 50 is difficult. However, since it is close to the frequency band of video and audio, it is necessary to sufficiently suppress spurious data signals.
[0048]
In FIG. 14, uplink data is assigned to band I, and downlink data is superimposed on the video signal. In this frequency allocation, it is necessary to devise code allocation so that interference with the subcarrier of the remote controller 50 does not occur, but the modulation / demodulation device may be a general-purpose product used in an existing remote controller and can be realized at low cost.
[0049]
In FIG. 15, the uplink data is assigned to the same band V as the video signal. Downstream data is superimposed on the video signal. In this frequency allocation, the uplink data is in a direction opposite to that of the video signal, so there is little interference. However, by using a time division method such as the period of line number 18 in FIG. The influence of interference can be further reduced.
[0050]
In FIG. 9, the horizontal separation signal H and the vertical synchronization signal V are input to the control circuit 146 using the synchronization separation circuit 55 so as to be a timing pulse when the time division method is implemented.
[0051]
As described above, the selected tuner unit 1 is connected to the antenna 7 to select a channel, wirelessly transmit the selected video signal and audio signal, and the monitor unit 2 receives and reproduces the video signal and audio signal. Thus, an easy-to-use liquid crystal television can be realized without impairing the installability and the intelligence due to the routing of the antenna wire.
[0052]
A third embodiment of the video and audio reproduction apparatus according to the present invention will be described with reference to FIG.
FIG. 16 is a block diagram showing a third embodiment of the tuner unit according to the present invention. In the tuner unit 301 of FIG. 16, display means 90 is added to the configuration of the tuner unit 101 of FIG. 4 so that it can be controlled by the control circuit 215, and the same blocks as in FIG. .
The feature of this embodiment is that the line connection status of the tuner unit 1 and the monitor unit 2 is displayed based on the upstream data from the monitor unit 2 received via the light receiving means 21.
[0053]
In FIG. 1, when the tuner unit 1 is installed, the light emitting means 3 is directed toward the monitor unit 2, but it is difficult to determine whether the direction is correct. Therefore, by displaying on the display means 90 that the return data signal from the monitor unit 2 has been received, it is possible to confirm that the installation direction of the tuner unit 1 is correct. In addition, description regarding the contents described in FIG. 4 such as signal processing is omitted.
According to the present embodiment, the installation work is facilitated, and the user-friendliness can be improved.
[0054]
  A fourth embodiment of the video and audio reproducing apparatus according to the present invention will be described with reference to FIG. FIG. 17 is a block diagram showing a fourth embodiment of the tuner unit according to the present invention. In FIG. 17, a control signal output terminal 91 is added to the configuration of the tuner unit 101 of FIG.315Thus, the external signal source 106 can be controlled, and the same blocks as those in FIG. The feature of the present embodiment is that the external signal source 106 can be operated by the remote controller 5 based on the upstream data from the monitor unit 2 received via the light receiving means 21.
[0055]
In FIG. 1, for example, the signal source 6 is controlled by the remote controller 5 such as playback and stop of a VTR, so that the usability of the user can be greatly improved. A control instruction from the remote controller 5 is transmitted to the tuner unit 401 through the monitor unit 1 and input to the control circuit 315 through the light receiving means 21, the filter 22, and the demodulation circuit 23. The control circuit 315 generates a control signal for the signal source 106 based on a control instruction from the remote controller 5 and outputs the control signal to the control signal output terminal 91. The connection between the control signal output terminal 91 and the signal source 106 may be wired when the signal source 106 has a control signal input terminal. When the signal source 106 does not have a control signal input terminal, for example, a device that converts the control signal output into an infrared signal may be provided in the tuner unit 401 and installed near the remote control light receiving window of the signal source 106. As a device for converting the control signal output into an infrared signal, for example, a video controller of a satellite broadcast reception set CS-SP80S (Sky PerfecTV! Reception set catalog '98 -12) manufactured by Hitachi, Ltd. may be used. This video controller or equivalent is available from various companies and is generally well known. A description of the contents described in FIG. 4 such as other signal processing of the tuner unit 401 is omitted.
According to the present embodiment, the external signal source can be controlled by the remote controller for the monitor unit, and user convenience can be improved.
[0056]
A fifth embodiment of the video and audio reproducing apparatus according to the present invention will be described with reference to FIG.
FIG. 18 is a schematic view showing a fifth embodiment of the video and audio reproducing apparatus according to the present invention. In FIG. 18, the light receiving process of the remote controller 5 can be performed not only by the monitor unit 2 but also by the tuner unit 501. The specific configuration of the tuner unit 501 may be the same as that shown in FIG. 1, and code information for the remote controller may be added so that the control circuit 15 shown in FIG. Since other signal processing and the like are the same as those described in the first embodiment, description thereof will be omitted.
[0057]
According to the present embodiment, not only the monitor unit but also the tuner unit can receive the signal from the remote controller 5 and the user convenience can be improved.
According to the present invention, a tuner unit and a monitor unit of a receiver such as a liquid crystal television are separated, video signals and audio signals are transmitted from the tuner unit to the monitor unit, and control data is exchanged between the tuner unit and the monitor unit. To eliminate the difference between the two operating states. As a result, it is possible to connect the antenna line to the separated tuner unit to select a channel, wirelessly transmit the selected video signal and audio signal to the monitor unit, and reproduce the video signal and audio signal. It is possible to realize an easy-to-use video and audio playback device without impairing the installation property and interior property due to routing.
[0058]
【The invention's effect】
  According to the present invention, it is possible to provide a receiving device, a display device, and a video / audio receiving system using them, which are easy to use without impairing the installation property and interior property due to the routing of the antenna wire.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a first embodiment of a video and audio reproduction apparatus according to the present invention.
FIG. 2 is a flowchart showing a normal processing flow of a remote controller, a monitor unit, and a tuner unit.
FIG. 3 is a flowchart showing a processing flow when a line is disconnected between the monitor unit and the tuner unit in the processing flow of the remote controller, the monitor unit, and the tuner unit;
FIG. 4 is a block diagram showing a first embodiment of a tuner unit according to the present invention.
FIG. 5 is a block diagram showing a second embodiment of the monitor unit according to the present invention.
FIG. 6 is a characteristic diagram showing an example of subcarrier frequency allocation.
FIG. 7 is a characteristic diagram showing another embodiment of subcarrier frequency allocation.
FIG. 8 is a block diagram showing a second embodiment of a tuner unit according to the present invention.
FIG. 9 is a block diagram showing a second embodiment of the monitor unit according to the present invention.
FIG. 10 is a block diagram illustrating an embodiment of a data synthesis circuit.
FIG. 11 is a block diagram showing an embodiment of a data separation circuit.
FIG. 12 is a signal waveform diagram for explaining superposition and separation of data from a video signal.
FIG. 13 is a characteristic diagram showing still another embodiment of subcarrier frequency allocation.
FIG. 14 is a characteristic diagram showing still another embodiment of subcarrier frequency allocation.
FIG. 15 is a characteristic diagram showing yet another embodiment of subcarrier frequency allocation.
FIG. 16 is a block diagram showing a third embodiment of the tuner unit according to the present invention.
FIG. 17 is a block diagram showing a fourth embodiment of the tuner unit according to the present invention.
FIG. 18 is a schematic diagram showing a fifth embodiment of the video and audio reproducing device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Tuner part, 2 ... Monitor part, 3 ... Transmission / reception part, 4 ... Transmission / reception part, 5 ... Remote control, 6 ... Signal source, 7 ... Antenna, 10 ... Tuner circuit, 11 ... Video detection circuit 12 ... Audio | voice detection circuit, 13 ... voice multiplex demodulation circuit, 14 ... switching circuit, 15, 46 ... control circuit, 16, 17, 18, 47 ... modulation circuit, 19 ... addition circuit, 20, 48 ... light emitting means, 21, 30, 43 ... light receiving means, 22, 31, 32, 33, 44 ... Filter, 21, 34, 35, 36, 45 ... Demodulation circuit, 37 ... Video processing circuit, 38 ... Synthesis circuit, 39 ... OSD generation circuit, 40 ... Display unit, 41 ... Audio Processing circuit, 42... Speaker system.

Claims (14)

A receiving unit for receiving a broadcast wave including a video signal and an audio signal;
A data input unit for inputting control data for controlling the video signal and the audio signal received by the receiving unit in a wireless manner;
A video / audio signal output unit for converting and outputting the video signal and the audio signal received by the receiving unit so as to be transmitted in a wireless manner;
When outputting the video signal and the audio signal by the video / audio signal output unit, the response data for responding to the control data input by the data input unit is mixed and output together with the video signal and the audio signal. A control unit for controlling
A receiving apparatus comprising: A receiving unit for receiving a broadcast wave including a video signal and an audio signal;
A data input unit for inputting control data for controlling the video signal and the audio signal received by the receiving unit in a wireless manner;
A video / audio signal output unit for converting and outputting the video signal and the audio signal received by the receiving unit so as to be transmitted in a wireless manner;
When outputting the video signal and the audio signal by the video / audio signal output unit, the response data for responding to the control data input by the data input unit is multiplexed and output to the video signal and the audio signal. A control unit for controlling
A receiving apparatus comprising: The receiving device according to claim 1,
The control unit controls the video / audio signal output unit so that the video signal, audio signal, and response data are mixed and output within a predetermined frequency band. The receiving device according to claim 2,
The control unit controls the video / audio signal output unit to multiplex and output the video signal, audio signal, and response data within a predetermined frequency band. The receiving device according to claim 2,
The control unit clamps the video signal, converts the response data from a parallel format to a serial format, selects a part of the clamped video signal with a gate signal, and converts it to the serial format during the selection period. Receiving apparatus, wherein the response data is multiplexed. The receiving apparatus according to claim 1 or 2,
A connection for connecting an external signal source for outputting a video signal and an audio signal to the receiving device ;
A switching unit that switches between a video signal and an audio signal input from the connection unit and a video signal and an audio signal received from the receiving unit;
The video / audio signal output unit outputs the video signal and audio signal switched by the switching unit,
The data input unit inputs control data for controlling the video signal and audio signal received by the receiving unit, and control data for controlling the external signal source,
The control unit generates a control signal for the external signal source based on the input control data, and outputs the control signal to the external signal source via a control signal output terminal . A receiver for receiving a broadcast signal including a video signal and an audio signal;
A demodulator that demodulates the broadcast signal received by the receiver;
A control data input unit for inputting control data for controlling a video signal and an audio signal included in the broadcast signal demodulated by the demodulation unit;
A video / audio signal output unit for modulating and outputting a video signal and an audio signal included in the broadcast signal demodulated by the demodulation unit into a wireless form;
When outputting the video signal and the audio signal by the video / audio signal output unit, the response data for responding to the control data input by the control data input unit is added to the video signal and the audio signal. A control unit that controls to output,
A receiving apparatus comprising: A first input unit that inputs, in a wireless form, data mixed with a video signal, an audio signal, and control data for controlling the video signal and the audio signal transmitted from the receiving device;
A separation unit that separates data input to the first input unit into a video signal, an audio signal, and control data;
A display reproduction unit for displaying and reproducing the video signal and the audio signal separated by the separation unit;
A control unit that controls the display / playback unit to display and play the video signal and the audio signal based on the control data separated by the separation unit;
A display device comprising: A first input unit that inputs, in a wireless form, data multiplexed with a video signal, an audio signal, and control data for controlling the video signal and the audio signal transmitted from the receiving device;
A separation unit that separates data input to the first input unit into a video signal, an audio signal, and control data;
A display reproduction unit for displaying and reproducing the video signal and the audio signal separated by the separation unit;
A control unit that controls the display / playback unit to display and play the video signal and the audio signal based on the control data separated by the separation unit;
A display device comprising: The display device according to claim 8 or 9,
A second input unit for inputting channel selection data for selecting a video signal and an audio signal input to the first input unit in a wireless manner;
A transmission unit that transmits the channel selection data input to the second input unit to the reception device in a wireless manner;
The display device according to claim 1, wherein a video signal and an audio signal of a channel selected by the channel selection data are input to the first input unit. The display device according to claim 9, wherein
The separation unit clamps the video signal, binarizes the clamped video signal based on a predetermined comparison level, converts a part of the binarized video signal by a gate signal, and converts the converted gate A display device for extracting control data multiplexed in a signal portion. In a video / audio receiving system having a receiving device and a display device,
The receiver is
A receiving unit for receiving a broadcast wave including a video signal and an audio signal;
A data input unit for inputting control data for controlling the video signal and the audio signal received by the receiving unit in a wireless manner;
A video / audio signal output unit for converting and outputting the video signal and the audio signal received by the receiving unit so as to be transmitted in a wireless manner;
When outputting the video signal and the audio signal by the video / audio signal output unit, the response data for responding to the control data input by the data input unit is mixed and output together with the video signal and the audio signal. And a control unit for controlling
The display device
A first input unit for inputting, in a wireless form, data in which a video signal, an audio signal and response data transmitted from the receiving device are mixed;
A separation unit that separates data input to the first input unit into a video signal, an audio signal, and response data;
A display reproduction unit for displaying and reproducing the video signal and the audio signal separated by the separation unit;
A control unit that controls the display / playback unit to display and play the video signal and the audio signal based on the response data separated by the separation unit;
A video and audio receiving system comprising: In a video / audio receiving system having a receiving device and a display device,
The receiver is
A receiving unit for receiving a broadcast wave including a video signal and an audio signal;
A data input unit for inputting control data for controlling the video signal and the audio signal received by the receiving unit in a wireless manner;
A video / audio signal output unit for converting and outputting the video signal and the audio signal received by the receiving unit so as to be transmitted in a wireless manner;
When outputting the video signal and the audio signal by the video / audio signal output unit, the response data for responding to the control data input by the data input unit is multiplexed and output to the video signal and the audio signal. And a control unit for controlling
The display device
A first input unit for inputting, in a wireless form, data multiplexed with video signals, audio signals, and response data transmitted from the receiving device;
A separation unit that separates data input to the first input unit into a video signal, an audio signal, and response data;
A display reproduction unit for displaying and reproducing the video signal and the audio signal separated by the separation unit;
A control unit that controls the display / playback unit to display and play the video signal and the audio signal based on the response data separated by the separation unit;
A video and audio receiving system comprising: The video / audio reception system according to claim 12 or 13,
In the display device,
A second input unit for inputting channel selection data for selecting a video signal and an audio signal input to the first input unit in a wireless manner;
A transmission unit that transmits the channel selection data input to the second input unit to the reception device in a wireless manner;
The receiving device inputs channel selection data transmitted from the transmission unit at the data input unit, and receives a video signal and an audio signal of a channel selected based on the channel selection data in the first of the display device. A video / audio reception system for transmission toward an input unit of

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