JP3912408B2 - Receiving apparatus and receiving method - Google Patents

Description

  The present invention relates to a receiving apparatus and a receiving method capable of simultaneously transmitting a video signal and a data signal.

Conventionally, a video signal and an audio signal are superimposed on a video signal from a broadcasting station and transmitted to a viewer (see, for example, Patent Document 1). Moreover, if the information accompanying the image to be transmitted can be transmitted, the information represented by the transmitted image can be further increased.
JP-A-7-274082

  However, in the conventional broadcasting system, there is no known broadcasting system that simultaneously displays the accompanying information in the effective screen of the transmission image.

  Therefore, according to the present invention, a receiving apparatus and a receiving device are provided, in which information associated with a transmitted video signal is transmitted at the same time as the video signal, and the viewer can easily output the received information as necessary. It aims to provide a method.

In order to achieve the above-described problems, the present invention includes a data extraction unit that receives a video signal in which a data signal related to a video signal is inserted, and extracts the data signal from the received video signal, and a data extraction unit. Storage means for storing the extracted data signal for a predetermined period, display control means for displaying the received video signal on the display unit, and instruction determination means for determining whether or not an instruction to display the related data signal has been received And when the data signal related to the video signal displayed on the display unit is stored in the storage unit, the display control unit displays, together with the video signal, a notification indicating that the related data signal exists. it is displayed, if the came instruction to display the relevant data signals, a receiving device according to claim Rukoto is displayed on the display unit of the relevant data signals.

Further, the present invention receives a video signal in which a data signal related to a video signal is inserted, extracts a data signal from the received video signal, and stores the data signal extracted by the data extraction step A means for storing for a predetermined period in the means; a display control step for displaying the received video signal on the display unit; and a command determining step for determining whether or not a command for displaying the related data signal has been received. control step, when the data signal associated with the video signal displayed on the display unit is stored in the storage means, a notification indicating that the associated data signal is present with a video signal, is displayed on the display unit, related when the instruction to display the data signal came, the receiving method comprising Rukoto is displayed on the display unit of related data signals That.

  According to the present invention, information associated with a transmission image is transmitted at the same time as the transmission image, and the received information can be easily output as necessary by the subject. For example, when the received video signal is displayed on the display unit and there is information related to the displayed video signal in the storage means, a signal indicating that the related information exists, for example, a logo is displayed as the video signal. Can be superimposed and output for display. Therefore, it is possible to recognize the presence / absence of related information regarding the video signal currently being viewed by the viewer.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, in this embodiment, information associated with a transmission image is expressed as transmission information. This shows, for example, detailed information on the CM product for the CM broadcast and the performer of the program or the program content for the TV program, but any other information may be used. Further, as a video signal output circuit or information output circuit, a device composed of a video monitor (display control means, notification judging means) and OSD (on-screen display) is used. Called.

  Further, although the video signal output circuit and the information output circuit are shared, it goes without saying that the same effect can be obtained even if independent circuits are used. Furthermore, letting the subject know that information is received and held is referred to as information reception notification. This means, for example, that a logo indicating information reception is displayed on the video monitor. Of course, it goes without saying that the same effect can be obtained by using any other display method. A signal obtained by encoding transmission information to be inserted into a video signal is simply referred to as a data signal.

  A block diagram of an embodiment of a transmission apparatus to which the present invention is applied is shown in FIG. It is a block diagram of a transmission apparatus in an information addition broadcasting system that enables simultaneous transmission of a video signal and transmission information by inserting a data signal into a transmission video signal. The transmission information is converted into a data signal to be transmitted by the data encoding circuit 11 and supplied to the data insertion circuit 12. The data insertion circuit 12 is supplied with the video signal to be transmitted. The data insertion circuit 12 inserts the data signal from the data encoding circuit 11 and supplies the data signal to the transmission circuit 13. The transmission circuit 13 modulates and amplifies the signal and transmits it through the antenna 14.

FIG. 2 shows an information temporary storage circuit in an information-added broadcasting system that can simultaneously transmit a video signal and transmission information by applying a data signal encoding transmission information to a transmission video signal by applying the present invention. 1 is a block diagram of a first embodiment of a receiving apparatus equipped with Signal received by the antenna 21 is demodulated by the receiving circuit 22 is supplied data detection / extraction circuit 23 and the video monitor 25 to the (display unit). The data detection / extraction circuit 23 (data extraction means) extracts a data signal from the supplied video signal and supplies it to the data decoding circuit 24. The data decoding circuit 24 decodes the data signal into transmission information and supplies it to the information temporary storage circuit 26.

The information temporary storage circuit 26 (storage means ) holds the supplied information for a certain period of time and simultaneously notifies the reception of information through the video monitor 25 for the same period of time. Alternatively, the information temporary storage circuit 26 receives information from the information display command circuit 27 ( command determination means) during the time when the information reception notification is made, that is, during the time when the information temporary storage circuit 26 holds the information. If there is a display instruction, the information held in the information temporary storage circuit 26 is output to the video monitor 25.

  FIG. 3 is a flowchart of the first embodiment of the present invention. In this flowchart, control is started from step S300, and the stored information is erased from the information temporary storage circuit 26 in step S300. In step S301, it is determined whether or not there is a data signal in the input video signal. If there is a data signal, the control moves to step S302, and if there is no data signal, the control returns to step S301. That is, control stops at step S301 until a data signal is detected.

  In step S302, the transmission information is decoded from the data signal and stored in the information temporary storage circuit 26. In step S303, information reception is notified to the video monitor 25. In step 304, it is determined whether or not a command for displaying information has been received. If information has been received, control is passed to step S307. If no information has been received, control is passed to step S305.

  In step S305, it is determined whether it is within the time to notify the reception of information. If it is within the time, the control moves to step S304, and if it is out of the time, the control moves to step S306. That is, step S304 and step S305 are repeated until a display command is received or the information reception notification time ends. In step S306, the information reception notification is terminated, that is, the display indicating the reception notification is erased from the video monitor 25, and the control shifts to step S300.

  On the other hand, also in step S307, the information reception notification is ended, that is, the display indicating the reception notification is deleted from the video monitor 25. In step S308, the transmission information held in the temporary information storage circuit 26 is displayed on the video monitor 25. In step S309, it is determined whether or not it is time to display information. If it is within the time, control returns to step S309, and if it is out of time, control is transferred to step S310. That is, during information display, control is stopped in step S309. In step S310, the information display ends, that is, the transmission information is erased from the video monitor 25, and the control returns to step S300.

  FIG. 4 shows an information storage circuit in an information-added broadcasting system that applies the present invention and inserts a data signal encoded with transmission information into a transmission video signal to enable simultaneous transmission of the video signal and transmission information. It is a block diagram of the 2nd example of a receiving device provided. The signal received by the antenna 41 is demodulated by the receiving circuit 42 and supplied to the data detection / extraction circuit 43 and the video monitor 45. The data detection / extraction circuit 43 extracts a data signal from the supplied video signal and supplies it to the data decoding circuit 44. The data decoding circuit 44 decodes the data signal into transmission information and supplies it to the information storage circuit 46.

  The information storage circuit 46 automatically stores all of the supplied information, but erases it depending on conditions such as the passage of time since storage. If there is an information display command from the information display command circuit 47, the information selection circuit 48 selects information according to the request of the viewer from the information stored in the information storage circuit 46, and this is selected as a video monitor. Output to 45.

  FIG. 5 is a flowchart of the second embodiment of the present invention. In this flowchart, control is started from step S500. In step S500, it is determined whether or not there is information satisfying the condition to be erased among the information stored in the information storage circuit 46. Control moves to S501, and if not, control moves to S502. In step S501, information satisfying the conditions to be erased is erased from the information accumulated in the information accumulation circuit 46.

  In step S502, it is determined whether or not there is a data signal in the input video signal. If there is, the control moves to step S503, and if not, the control moves to step S504. In step S503, transmission information obtained by decoding the data signal is stored in the information storage circuit 46. In step S504, it is determined whether or not an instruction to display information has been received. If an instruction has been received, control is passed to step S505, and if not, control is returned to step S500. In step S 505, necessary information is selected from the transmission information held in the information storage circuit 46 through the information selection circuit 48 and displayed on the video monitor 45.

  In step S506, it is determined whether or not it is within the time to display information. If it is within the time to display information, the control returns to step S506, and if it is out of time, the control shifts to step S507. That is, during the information display, the control is stopped in step S506. In step S507, the information display is ended, that is, the transmission information is deleted from the video monitor 45, and the control is shifted to step S500.

  FIG. 6 is a block diagram showing the information temporary storage and the information temporary storage system among the information-added broadcasting systems that can simultaneously transmit the video signal and the transmission information by inserting the data signal encoded with the transmission information into the transmission video signal. It is a block diagram of the 3rd Example of the receiver provided with the information storage circuit. The signal received by the antenna 61 is demodulated by the receiving circuit 62 and supplied to the data detection / extraction circuit 63 and the video monitor 65. The data detection / extraction circuit 63 extracts a data signal from the supplied video signal and supplies the data signal to the data decoding circuit 64.

  The data decoding circuit 64 decodes the data signal into transmission information and supplies it to the information temporary storage circuit 66 and the information storage circuit 69. The information storage circuit 69 automatically stores the supplied information. However, the information storage circuit 69 is erased depending on conditions such as the passage of time since the storage. The information temporary storage circuit 66 holds the supplied information for a certain period of time, and at the same time, notifies the information reception through the video monitor 65 for the same period of time. Alternatively, the information temporary recording circuit 66 may receive an information display command from the information commanding means 67 during the time when the information temporary recording circuit 66 holds the information, that is, during the time when the information temporary storage circuit 66 holds the information. The information held in the information temporary storage circuit 66 is output to the video monitor 65.

  Alternatively, the information temporary storage circuit 66 may receive an information display instruction from the information display instruction circuit 67 outside the time when the information temporary storage circuit 66 notifies the reception of information, that is, when the information temporary storage circuit 66 does not hold information. Of the information stored in the information storage circuit 69, information according to the request of the viewer is selected through the information selection circuit 68 and output to the video monitor 65.

  FIG. 7 is a flowchart of the third embodiment of the present invention. In this flowchart, control starts from step S700, and the stored information is erased from the information temporary storage circuit 66 in step S700. In step S701, it is determined whether there is any information stored in the information storage circuit 69 that satisfies the condition to be erased. If the condition is satisfied, the control moves to step S702, and the condition is changed. If not, the control moves to S703.

  In step S702, information stored in the information storage circuit 69 that satisfies the conditions to be deleted is deleted. In step S703, it is determined whether or not there is a data signal in the input video signal. If there is a data signal, control proceeds to step S704, and if there is no data signal, control proceeds to step S714. In step S704, transmission information obtained by decoding the data signal is held in the information temporary storage circuit 66. In step S705, transmission information obtained by decoding the data signal is stored in the information storage circuit 69. In step S706, information reception is notified to the video monitor 65.

  In step S707, it is determined whether or not an instruction to display information has been received. If an instruction has been received, control is passed to step S710, and if no instruction has been received, control is transferred to step S708. In step S708, it is determined whether it is within the time to notify the reception of information. If it is within the time, control returns to step S707, and if it is out of time, control is transferred to step S709. That is, step S707 and step S708 are repeated until a display command is received or the information reception notification time ends. In step S709, the information reception notification is terminated, that is, the display indicating the reception notification is deleted from the video monitor 65, and the control returns to step S700.

  On the other hand, also in step S710, the information reception notification is ended, that is, the display indicating the reception notification is deleted from the video monitor 65. In step S711, the transmission information held in the information temporary storage circuit 66 is displayed on the video monitor 65. In step S712, it is determined whether or not it is time to display information. If it is within the time, control proceeds to step S712, and if it is out of time, control proceeds to step S713. That is, during the information display, control is stopped in step S712. In step S713, the information display ends, that is, the transmission information is erased from the video monitor 65, and the control returns to step S700.

  On the other hand, also in step S714, it is determined whether or not an instruction to display information has been received. If an instruction has been received, control is passed to step S715, and if no instruction has been received, control is returned to step S701. In step S715, necessary information is selected from the transmission information held in the information storage circuit 69 through the information selection circuit 68 and displayed on the video monitor 65. In step S716, it is determined whether it is within the time to display information. If it is within the time, control returns to step S716, and if it is out of time, control proceeds to step S717. That is, during the information display, control is stopped in step S716. In step S717, the information display ends, that is, the transmission information is erased from the video monitor 65, and the control returns to step S701.

  FIG. 8 shows an embodiment of an information-added broadcasting system that realizes the present invention using the embodiment described above. The broadcasting station 81 broadcasts a television signal on which a data signal is superimposed through the transmission antenna 82.

  The receiving side first transmits a signal input from the receiving antenna 83 to a tuner, a decoder, an OSD for displaying information on a monitor, an information storage device or an information storage device, and an information display command, or means for selecting information from the stored information Is supplied to a set top box 84 having an interface (I / F). In the set-top box 84, when a data signal is detected from the video signal, the information is taken out and held or stored, and the television monitor 85 is notified of information reception.

  The viewer sees the information reception notice and, when information is desired, transmits the command to the set top box 84 through the interface. The set top box 84 superimposes the stored information or accumulated information on the video signal and displays it on the television monitor 85. Here, the set-top box 84 and the television monitor 85 are shown separately, but of course, there is no problem if the function of the set-top box 84 is built in the housing of the television monitor 85.

  In the above embodiment, it will be appreciated that the same effect can be obtained by any method in which a data signal encoded with transmission information can be inserted into a transmitted video signal. Take the method of inserting into a video signal so that it is displayed as a graphic or symbol within the available screen where possible. Hereinafter, a method for displaying a data signal as a figure or a symbol on an effective screen capable of visually recognizing as an example of a method for inserting a data signal encoded with transmission information into a transmission video signal will be described with reference to the drawings. To do.

  The video signal effective display screen is an area generally displayed on a video monitor. In the case of the NTSC system, the video signal effective display screen generally indicates the 22nd to 263th scanning lines and the 285th to 525th scanning lines. In the PAL system, generally, the 23rd to 314th scanning lines and the 336th to 625th scanning lines are shown. The information listed here is generally visually recognized by the viewer.

  An example of such a signal is shown in FIG. By arranging these signals in time series, considerable information can be transmitted. In this example of the data signal, one scanning line is set to a predetermined data display time on the basis of Hsync (horizontal synchronization signal) of a predetermined data display scanning line among the scanning lines of the video signal. Data signal insertion is realized by placing bit information. Hereinafter, this figure is called a pseudo barcode. A data detection pattern is always written at a predetermined position of the pseudo barcode, and the data detection / extraction circuit detects the pseudo barcode by reading the pattern.

  FIG. 10 is a block diagram of an embodiment of the data insertion means for inserting the pseudo barcode shown in FIG. 9, and corresponds to the embodiment of the data insertion circuit 12 in FIG. The supplied video signal is input to the vertical synchronization signal separation circuit 101 and the horizontal synchronization signal separation circuit 102, respectively, and the vertical synchronization signal and the horizontal synchronization signal are separated. The counter 103 counts the horizontal synchronization signal, but the count is reset by the input of the vertical synchronization signal. Thereby, the scanning line number of the input video signal is obtained.

  On the other hand, the pseudo barcode, that is, the data signal is composed of two types of video signals representing 1 and 0, that is, a black signal and a white signal. The microcomputer (μCOM) 106 switches the video signal input switch 105 at the time interval given by the clock 107 according to the content of data to be transmitted, and further switches the video signal output switch 104 according to the scanning line number indicated by the counter 103. Insert it as a data signal on the screen.

  FIG. 11 is a block diagram of an embodiment of the data detection / extraction means for detecting / extracting the pseudo barcode of FIG. 9, and corresponds to the embodiment of the data detection / extraction circuit 23 in FIG. The supplied video signal is input to the vertical synchronization signal separation circuit 111 and the horizontal synchronization signal separation circuit 112, respectively, and the vertical synchronization signal and the horizontal synchronization signal are separated. The counter 115 counts the horizontal synchronization signal, but the count is reset by the input of the vertical synchronization signal. Thereby, the scanning line number of the input video signal is obtained.

  On the other hand, the video signal is input to an A / D converter 113 having a threshold value such that 1 is input when a white video signal is input and 0 is output when a black video signal is input. Supply. The microcomputer 114 determines whether or not the data signal is inserted from the vertical synchronization signal and horizontal synchronization signal and the scanning line number supplied from the counter 115, and the scanning line into which the data signal is inserted. If there is, the data signal is extracted by appropriately sampling the input signal from the A / D converter 113 using the clock 116.

  Furthermore, if the data detection pattern as shown in FIG. 9 cannot be detected in the extracted data signal, the microcomputer 114 regards the extracted data as not data in this system, discards the extracted data, If the detection pattern can be detected, a data signal is output.

  In the above-described embodiment, the data signal inserted at a predetermined position as shown in FIG. 9 is given as an example of data encoded as a graphic or a symbol in an effective screen that can be visually recognized by the viewer. This is to lighten the burden on the data detection circuit. It goes without saying that if the data detection circuit can detect a figure encoded with data inserted into the effective screen, it can be inserted at an arbitrary position. Yes.

  In the above-described embodiment, the data signal as shown in FIG. 9 is given as an example of data encoded as a graphic or a symbol in an effective screen that can be visually recognized by the subject. However, information can be transmitted. It goes without saying that the same effect can be obtained by the present invention regardless of the shape.

  The present invention is not limited to the above-described embodiment of the present invention, and various modifications and applications are possible without departing from the spirit of the present invention.

It is a block diagram of one Example of the transmitter to which this invention is applied. 1 is a block diagram of a first embodiment of a receiving apparatus to which the present invention is applied and provided with an information temporary storage circuit. FIG. It is a flowchart of the 1st Example which can implement | achieve the function of the receiver which applied this invention and was provided with the information temporary storage circuit. It is a block diagram of the 2nd Example of the receiver which applied this invention and was provided with the information storage circuit. It is a flowchart of the 2nd Example which can implement | achieve the function of the receiver which applied this invention and was provided with the information storage circuit. FIG. 10 is a block diagram of a third embodiment of a receiving apparatus to which the present invention is applied and which includes a temporary information storage circuit and an information storage circuit. It is a flowchart of the 3rd Example which can realize the function of the receiving device provided with the information temporary storage circuit and the information storage circuit by applying this invention. It is the schematic of one Example of the information addition broadcasting system of this invention. It is a basic diagram which shows an example of the data signal displayed on a video monitor. 1 is a block diagram of an embodiment of a data insertion circuit according to the present invention. FIG. 1 is a block diagram of an embodiment of a data detection / extraction circuit according to the present invention. FIG.

Explanation of symbols

21 Antenna 22 Reception Circuit 23 Data Detection / Extraction Circuit 24 Data Decoding Circuit 25 Video Monitor 26 Information Temporary Storage Circuit 27 Information Display Command Circuit

Claims (8)

Data extraction means for receiving a video signal in which a data signal related to the video signal is inserted, and extracting the data signal from the received video signal;
Storage means for storing the data signal extracted by the data extraction means for a predetermined period;
Display control means for displaying the received video signal on a display unit ;
Command determining means for determining whether or not a command for displaying the related data signal has been received;
When the data signal related to the video signal displayed on the display unit is stored in the storage means, the display control means sends a notification indicating the presence of the related data signal together with the video signal. Display on the display ,
When the instruction to display the data signals associated with the came, the receiving apparatus according to claim Rukoto data signals the associated is displayed on the display unit.   2. The receiving apparatus according to claim 1, further comprising notification determining means for determining whether or not a data signal related to the video signal displayed on the display unit is stored in the storage means.   The display control means, when a data signal related to the video signal displayed on the display unit is stored in the storage means, a logo indicating that the related data signal exists together with a video signal video, The receiving apparatus according to claim 1, wherein the receiving apparatus displays on the display unit.   2. The receiving apparatus according to claim 1, wherein the display control unit outputs the related data signal only for a predetermined time in which the related data signal is stored in the storage unit. A data extraction step of receiving a video signal in which a data signal related to the video signal is inserted, and extracting the data signal from the received video signal;
Storing the data signal extracted by the data extraction step in a storage means for a predetermined period;
A display control step for displaying the received video signal on a display unit ;
A command determination step for determining whether a command to display the related data signal has been received,
In the display control step, when a data signal related to the video signal displayed on the display unit is stored in the storage unit, a notification indicating that the related data signal exists is displayed together with the video signal together with the video signal. Display on the display ,
When it came instructions to display the data signals relating said reception method comprising Rukoto to display the data signals to the aforementioned associated with the display unit. 6. The receiving method according to claim 5 , further comprising a notification determining step of determining whether or not a data signal related to the video signal displayed on the display unit is stored in the storage means. In the display control step, when a data signal related to the video signal displayed on the display unit is stored in the storage unit, a logo indicating that the related data signal is present together with a video signal video, The receiving method according to claim 5 , wherein the display is performed on the display unit. 6. The receiving method according to claim 5 , wherein the related data signal is output from the display control step only for a predetermined time in which the related data signal is stored in the storage means.

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