JP2007158788A - Television broadcast receiver and time information replacement method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To replace time information in a teletext signal with time information obtained from a terrestrial digital broadcast signal and to display the replaced time information when the time in the teletext signal of analog broadcasting is not correct by acquiring the time information from the terrestrial digital broadcast signal. <P>SOLUTION: This television broadcast receiver (TV) 10 is provided with: a teletext decoder 13 for extracting time information included in a teletext broadcast signal received by a terrestrial analogy tuner 11; a DVBT (Digital Video Broadcasting Terrestrial) decoder 14 for extracting time information included in a digital broadcast signal received by a terrestrial digital tuner 12; a control part 15 for comparing two pieces of the extracted time information; and an OSD controller 16 for superimposing the time information of the digital broadcast signal on the teletext broadcast signal in place of time information of the teletext broadcast signal when the two pieces of time information are different. The TV 10 displays the teletext broadcast signal on which the time information of the digital broadcast signal is superimposed by the OSD controller 16 on a display part 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a television broadcast receiving apparatus and a time information replacement method, and more particularly, to display time information included in a teletext broadcast when displaying a teletext broadcast (generally for Europe and parts of Asia). The present invention relates to a television broadcast receiver capable of replacing and displaying with time information included in a broadcast, and a time information replacement method by the television broadcast receiver.

  A television receiver or the like has a built-in clock (timer), but an error occurs in the built-in clock due to fluctuations in power supply voltage or temperature changes. Since this error becomes a level that cannot be ignored as it is used for a long time, it is necessary to correct the internal clock periodically or at an arbitrary timing.

  Conventionally, as a technique related to correction of time information, in Japan, a technique (just clock function) for correcting a built-in timer based on a time signal is generally used (for example, see Patent Document 1). Is a technology that broadcasts a signal containing the current time called an EDS (Extended Data Service) signal to the television radio waves broadcast by the TV receiver, and the television receiver acquires and corrects the current time from the signal (auto clock function). Is used (see, for example, Patent Document 2).

  The invention described in the above-mentioned Patent Document 1 accurately uses a timepiece sound signal transmitted from a broadcasting station in a receiver device used in a television receiver, a radio receiver, a VTR, etc. with a built-in clock. It detects and automatically corrects the time of the built-in clock. In the invention described in Patent Document 2, an EDS signal transmitted together with closed caption information is formed into a data packet. Each packet includes information on a current or future video program, a source of the video program, a time, and the like. The various kinds of information are stored, and the operation of the video system is controlled by decoding the EDS signal.

  In some European and Asian regions, a technology similar to the US method (VPS: Video Program System) is employed (see, for example, Patent Documents 3 and 4), and teletext signals multiplexed on television signals are used. A technique for correcting a built-in timer of a television receiver based on the extracted time information is used. A technique for correcting time information such as a built-in clock using time information during digital terrestrial broadcasting has also been proposed (see, for example, Patent Document 5).

  The invention described in Patent Document 3 extracts time information included in the vertical blanking interval of the television signal or time information included in the teletext signal, thereby correcting the time of the timer circuit and correcting the time. The accurate time of the timer circuit is displayed on the CRT. In the invention described in Patent Document 4, when a specific channel is selected, clock data is extracted from the received signal received by the tuner and output to the clock count unit, and clock counting is started with the clock data. Is displayed on the clock display section.

  Further, the invention described in Patent Document 5 receives a transport stream signal including audio digital information, video digital information, time information, and the like in a satellite digital broadcast receiver to which a peripheral device having a clock function is connected. The time information included in the received transport stream signal is transmitted to the peripheral device in a format that can be received by the peripheral device, and the time information of the clock of the peripheral device is corrected.

  Here, in Europe and some parts of Asia, caption broadcasting is performed using the above-described teletext. Similarly, in Japan, supplementary information of programs is broadcast using character multiplex broadcasting, and in the United States, closed captions called closed captions are performed.

  This text multiplex broadcasting such as teletext broadcasting is a system for sending text data such as characters and figures simultaneously with television broadcasting. In television broadcast radio waves, there is a gap that is not used to transmit an image, which is called a vertical blanking period (vertical blanking period). Using these gaps, it is possible to multiplex and send still picture programs such as characters and graphics with normal television broadcasts. As contents of the program, for example, subtitle broadcasting, news broadcasting, weather forecast, stock information, and the like are provided.

  In some parts of Europe and Asia, unlike Japan and the United States, teletext broadcasting is more actively used as one program, and it is deeply permeated as a means of obtaining daily information. In Europe, as in Japan and the United States, terrestrial digital broadcasting has been started, and analog broadcasting such as teletext and terrestrial digital broadcasting are used together.

In the above situation, analog broadcasting equipment with a long history compared to equipment for terrestrial digital broadcasting with new broadcasting equipment introduced and good management of time information etc., has many older introduction times, and The fact is that maintenance is not good. For this reason, there is a case where there is a difference between the time information in the teletext signal and the time information in the terrestrial digital broadcast signal, and in Europe where there are many opportunities to obtain daily information from widely used teletext broadcasts. In some cases, incorrect time information may cause problems.
Japanese Patent Publication No. 7-27037 JP 7-506475 A JP-A-8-195941 JP-A-8-335342 JP 2002-228780 A

  However, since the time information included in the teletext signal is sent from the broadcasting station side, there has been no way to correct this time information on the receiving side. If the time information remains incorrect, an incorrect time is displayed on the screen. In particular, depending on the region (country), there may be a difference in minutes, and there is a problem that viewers who use teletext on a daily basis cannot grasp the exact time.

  The present invention has been made in view of the above-described circumstances. When time information is acquired from a terrestrial digital broadcast signal and the time in an analog broadcast teletext signal is incorrect, It is an object of the present invention to provide a television broadcast receiving apparatus that replaces and displays the time information with the time information acquired from the terrestrial digital broadcast signal, and a time information replacement method using the apparatus.

  In order to solve the above-mentioned problems, the first technical means of the present invention includes an analog broadcast receiving means for receiving an analog broadcast signal, a digital broadcast receiving means for receiving a digital broadcast signal, and the analog broadcast signal or the digital broadcast. In a television broadcast receiving device comprising a display means for displaying a signal, means for extracting time information contained in the analog broadcast signal, means for extracting time information contained in the digital broadcast signal, and the extracted Comparing means for comparing two time information and when the two time information are different, the time information of the digital broadcast signal is superimposed on the display screen related to the analog broadcast signal instead of the time information of the analog broadcast signal Time information superimposing means, and the display means uses the time information superimposing means to transmit the digital broadcast signal. Is obtained is characterized in that time information for displaying the analog broadcast signal superimposed.

  According to a second technical means, in the first technical means, the time information superimposing means sends a message for notifying that the time information of the analog broadcast signal is replaced with the time information of the digital broadcast signal. It is characterized in that it is superimposed on the display screen relating to the signal.

  According to a third technical means, in the first technical means, the time information superimposing means displays an icon for notifying that the time information of the analog broadcast signal has been replaced with the time information of the digital broadcast signal. It is characterized in that it is superimposed on the display screen relating to the signal.

  According to a fourth technical means, in the first technical means, the time information superimposing means expresses that the time information of the analog broadcast signal has been replaced with the time information of the digital broadcast signal. The present invention is characterized in that the display format of the time information of the broadcast signal is processed.

  According to a fifth technical means, in the first technical means, the time information superimposing means superimposes information indicating a degree of difference between the two time information on the analog broadcast signal.

  A sixth technical means is the first technical means, wherein the comparing means determines whether or not a difference between the two time information is within a predetermined range, and the time information superimposing means is the two time information. When it is determined that the difference in time exceeds a predetermined range, the time information of the analog broadcast signal is replaced with the time information of the digital broadcast signal.

  The seventh technical means comprises the time measuring means for measuring time in the first technical means, and when the time information by the time measuring means is different from the time information of the digital broadcast signal, the time of the digital broadcast signal is The time information of the time measuring means is corrected based on the information.

  According to an eighth technical means, in any one of the first to seventh technical means, the analog broadcast signal is a teletext broadcast, and the digital broadcast signal is a terrestrial digital broadcast. It is a thing.

  A ninth technical means is a television comprising analog broadcast receiving means for receiving an analog broadcast signal, digital broadcast receiving means for receiving a digital broadcast signal, and display means for displaying the analog broadcast signal or the digital broadcast signal. In the time information replacement method by the John broadcast receiving apparatus, a step of extracting time information included in the analog broadcast signal, a step of extracting time information included in the digital broadcast signal, and the extracted two time information Comparing the time information of the digital broadcast signal on the display screen related to the analog broadcast signal instead of the time information of the analog broadcast signal when the two time information are different from each other; The analog broadcast signal on which the time information of the broadcast signal is superimposed is displayed on the display means. It is obtained characterized by a step of.

  According to the present invention, when time information is acquired from a terrestrial digital broadcast signal operated under good maintenance using a highly accurate device, and the time in the analog text teletext signal is incorrect. Can replace the time information in the teletext signal with the time information acquired from the terrestrial digital broadcast signal, so that accurate time information can always be displayed when viewing the teletext broadcast program. .

  FIG. 1 is a block diagram showing a configuration example of a television broadcast receiver according to an embodiment of the present invention. In the figure, 10 is a television broadcast receiver, and the television broadcast receiver 10 is a terrestrial analog. A terrestrial analog tuner 11 for receiving a broadcast signal (hereinafter represented by a teletext signal), a terrestrial digital tuner 12 for receiving a terrestrial digital broadcast signal, and a telescope received by the terrestrial analog tuner 11. A teletext decoder 13 that decodes a text signal, a DVB-T (Digital Video Broadcasting Terrestrial) decoder 14 that decodes a terrestrial digital broadcast signal received by the terrestrial digital tuner 12, and each component of the television broadcast receiver 10 Control unit 1 for controlling the operation of A time measuring unit 15a for measuring time, an OSD controller 16 for superimposing an on-screen signal on a teletext signal or a terrestrial digital broadcast signal, and a display unit 17 such as a liquid crystal display (LCD). It is configured.

  An example of processing for receiving and displaying a teletext signal by the television broadcast receiver 10 shown in FIG. 1 will be described. The teletext decoder 13 decodes the teletext signal to extract time information included in the teletext signal, and the DVB-T (Digital Video Broadcasting Terrestrial) decoder 14 decodes the terrestrial digital broadcast signal to terrestrial digital. Time information included in the broadcast signal is extracted. In the case of a terrestrial digital broadcast signal, time information is included in the transport stream. This transport stream includes video encoded data, audio encoded data, clock reference (time information), program specific information (PSI: Program Specific Information) / program information (SI: Service Information), data encoded signals, and the like. It is configured.

  The control unit 15 compares the time information extracted by the teletext decoder 13 with the time information extracted by the DVB-T (Digital Video Broadcasting Terrestrial) decoder 14, and as a result, it is determined that the two time information are different. In this case, the OSD controller 16 is instructed to replace the time information of the teletext signal with the time information of the terrestrial digital broadcast signal.

  The OSD controller 16 corresponds to the time information superimposing means of the present invention, and replaces the time information of the teletext signal with the time information of the terrestrial digital broadcast signal in accordance with an instruction from the control unit 15, and replaces the replaced terrestrial digital broadcast signal. The time information is superimposed on the teletext signal. The display unit 17 is a display unit such as an LCD, and displays a teletext signal on which the time information of the terrestrial digital broadcast signal is superimposed by the OSD controller 16.

  In general, broadcasting station equipment for transmitting terrestrial digital broadcasts is new, high-precision equipment is used, and it is operated under good maintenance, so the time information contained in terrestrial digital broadcasts is accurate. is there. On the other hand, time information included in teletext broadcasting, which is terrestrial analog broadcasting, is often out of order because the maintenance of the broadcasting station equipment is not sufficient.

  When the television broadcast receiver 10 of the present invention displays a teletext broadcast including time information, the time information is also acquired from the terrestrial digital broadcast, and when the two time information are different as described above, The time information of the teletext broadcast is determined to be inaccurate, and is replaced with the time information of the terrestrial digital broadcast. On the other hand, if the two pieces of time information are the same, it is determined that the time information of the teletext broadcast is accurate, and the time information of the teletext broadcast is displayed as it is.

  In teletext broadcasting, for example, time information is displayed on the upper right of the screen as shown in FIG. When the time information included in the teletext broadcast is inaccurate, it is replaced with the accurate time information of the terrestrial digital broadcast.

  Further, the digital broadcast for obtaining accurate time information may be other than the terrestrial digital broadcast, and may be a digital broadcast using a satellite such as BS digital broadcast or CS digital broadcast. In this case, it is necessary to provide a tuner, a decoder, etc. for receiving and decoding satellite digital broadcasting.

  As another embodiment of the present invention, it may be determined whether a difference between time information of teletext broadcasting and time information of terrestrial digital broadcasting is within a predetermined range (for example, 30 seconds). This determination process is executed by the control unit 15. When it is determined that the difference between the two pieces of time information exceeds a predetermined range, the control unit 15 instructs the OSD controller 16 to replace the time information with that of terrestrial digital broadcasting. On the other hand, when the difference is within the predetermined range, the OSD controller 16 is instructed to display the time information of the teletext broadcast as it is without replacing the time information.

  In addition, depending on the user, the time zone for viewing the teletext broadcast may be roughly determined. In this case, a time zone for viewing the teletext broadcast may be set in advance, and processing for replacing the time information of the terrestrial digital broadcast only during this time zone may be performed.

  Further, the television broadcast receiving apparatus 10 includes time measuring means 15a that is an internal clock. The time measuring means 15a may be corrected based on time information of terrestrial digital broadcasting. In this case, the control unit 15 compares the time information by the time measuring means 15a with the time information of the terrestrial digital broadcast, and if they are different, the time of the time measuring means 15a is based on the time information of the terrestrial digital broadcast. A process of correcting the information is performed.

  When a peripheral device such as an HDD (hard disk) recorder or a DVD recorder is connected to the television broadcast receiver 10, the time information of the peripheral device is corrected simultaneously based on the time information corrected by the time measuring means 15a. You may make it do. As a result, in the system including the television broadcast receiving apparatus 10 and peripheral devices, accurate time information is held, so that recording reservations and viewing reservations can be performed with high accuracy.

  FIG. 2 is a flowchart for explaining an example of the time information replacement method by the television broadcast receiver 10 shown in FIG. First, the television broadcast receiver 10 receives a terrestrial analog (teletext) signal (step S1), decodes the received teletext signal (step S2), and extracts time data (step S3). Next, a terrestrial digital signal is received (step S4), the received terrestrial digital signal is decoded, and time data is extracted (step S5).

  Next, the television broadcast receiving apparatus 10 compares the time data extracted in step S3 with the time data extracted in step S5 (step S6), and determines whether these two time data are different (step S6). If the two are different (YES), the teletext broadcast time data is replaced with the terrestrial digital broadcast time data (step S8), and the teletext screen is displayed (step S9). If both are the same (NO) in step S7, the process proceeds to step S9, and the teletext broadcast time data is displayed on the screen as it is.

  FIG. 3 is a diagram showing a screen example of the display unit 17 in which the time is replaced by the time information replacement method of the present invention, in which 18 is time data of terrestrial digital broadcasting and 19 is time data of teletext broadcasting. Indicates. The time data 18 indicates “12: (hours) 34: (minutes) 56 (seconds)”, and the time data 19 indicates “12: (hours) 35: (minutes) 56 (seconds)”. Therefore, the original time data 19 of the teletext broadcast is replaced with the time data 18 indicating the correct time and displayed on the display unit 17. At this time, information indicating the degree of time difference between the two may be displayed. For example, since the time data 18 and the time data 19 in this example are shifted by 1 minute, characters such as “shifted by 1 minute” are displayed, and the degree of the shift can be intuitively understood by a bar display or the like. May be.

  FIG. 4 is a flowchart for explaining another example of the time information replacement method of the present invention. First, the television broadcast receiving apparatus 10 determines whether or not to display time data of teletext broadcasting (step S11). When displaying time data (in the case of YES), the terrestrial digital broadcasting and analog broadcasting (television broadcasting) are displayed. It is determined whether or not the time is different for text broadcasting (step S12). Next, if the two are different in step S12 (in the case of YES), the display format of the time data is processed such as changing the display color of the time display (step S13) and replaced with the time data of terrestrial digital broadcasting. (Step S14), teletext data is displayed (Step S15). In step S11, when the time data is not displayed (in the case of NO), the process proceeds to step S15 and teletext data is displayed.

  FIG. 5 is a diagram showing another screen example of the display unit 17 in which the time has been replaced by the time information replacement method of the present invention, in which 18 indicates time data of terrestrial digital broadcasting. In this example, teletext broadcast is displayed on the screen of the display unit 17, and the replaced time data 18 is displayed superimposed on the upper right of the screen. Here, in order to clearly indicate that the time data 18 has been replaced, for example, the display mode of the time data is modified such as changing the display color, underlining, italicizing, or changing the character size.

  FIG. 6 is a flowchart for explaining another example of the time information replacement method of the present invention. First, the television broadcast receiver 10 determines whether or not to display time data of teletext broadcasting (step S21). When displaying time data (in the case of YES), the terrestrial digital broadcasting and analog broadcasting (television broadcasting) are displayed. It is determined whether or not the time is different in text broadcasting (step S22). Next, when both are different in step S12 (in the case of YES), an icon indicating that the time has been replaced is added (step S23), and the time data of terrestrial digital broadcasting is replaced (step S24). Teletext data is displayed (step S25). In step S21, when time data is not displayed (in the case of NO), the process proceeds to step S25, and teletext data is displayed.

  FIG. 7 is a diagram showing another screen example of the display unit 17 in which the time is replaced by the time information replacement method of the present invention. In FIG. 7A, teletext broadcast is displayed on the screen of the display unit 17, and time data 18 of the replaced terrestrial digital broadcast is displayed superimposed on the upper right of the screen. Further, an icon 20 indicating that the time data has been replaced is added in the vicinity of the time data 18. In FIG. 7B, teletext broadcast is displayed on the screen of the display unit 17, and time data 18 of the replaced terrestrial digital broadcast is displayed superimposed on the upper right of the screen. In this example, a message 21 indicating that the time data has been replaced is added in the vicinity of the time data 18.

  FIG. 8 is a diagram showing an example of a setting screen for setting an error range of time data. In the figure, 22 indicates an input field for inputting an error range. The user of the television broadcast receiving apparatus 10 operates the remote controller or the like to display a setting screen on the display unit 17, inputs a desired error range (for example, 30 seconds) in the input field 22, and the “OK” key Press to set the error range. When the difference between one time data is within 30 seconds according to the error range set as described above, the television broadcast receiving apparatus 10 displays the time data of teletext broadcasting as it is, while the difference exceeds 30 seconds. The time data of terrestrial digital broadcasting is replaced and displayed.

  As described above, according to the present invention, time information is acquired from a terrestrial digital broadcast signal that is operated under good maintenance using a highly accurate device, and time in an analog broadcast teletext signal is obtained. Can be displayed by replacing the time information in the teletext signal with the time information obtained from the terrestrial digital broadcast signal, so that the time information is always accurate when viewing the teletext broadcast program. Can be displayed.

It is a block diagram which shows the structural example of the television broadcast receiver which concerns on one Embodiment of this invention. It is a flowchart for demonstrating an example of the time information replacement | exchange method by the television broadcast receiver shown in FIG. It is a figure which shows the example of a screen of the display part by which time was replaced by the time information replacement method of this invention. It is a flowchart for demonstrating the other example of the time information replacement method of this invention. It is a figure which shows the other example of a screen of the display part by which time was replaced by the time information replacement method of this invention. It is a flowchart for demonstrating the other example of the time information replacement method of this invention. It is a figure which shows the other example of a screen of the display part by which time was replaced by the time information replacement method of this invention. It is a figure which shows an example of the setting screen for setting the error range of time data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Television broadcast receiver, 11 ... Terrestrial analog tuner, 12 ... Terrestrial digital tuner, 13 ... Teletext decoder, 14 ... DVBT decoder, 15 ... Control part, 15a ... Time measuring means, 16 ... OSD controller, 17 ... Display unit, 18, 19 ... time data, 20 ... icon, 21 ... message, 22 ... input field.

Claims (9)

  In a television broadcast receiving apparatus comprising: an analog broadcast receiving means for receiving an analog broadcast signal; a digital broadcast receiving means for receiving a digital broadcast signal; and a display means for displaying the analog broadcast signal or the digital broadcast signal. The means for extracting the time information contained in the analog broadcast signal, the means for extracting the time information contained in the digital broadcast signal, and the comparison means for comparing the two extracted time information are different from each other. A time information superimposing unit that superimposes the time information of the digital broadcast signal on a display screen related to the analog broadcast signal instead of the time information of the analog broadcast signal, and the display unit superimposes the time information Displaying the analog broadcast signal on which the time information of the digital broadcast signal is superimposed by means Television broadcasting receiving apparatus according to claim the door.   2. The television broadcast receiver according to claim 1, wherein the time information superimposing unit sends a message for notifying that the time information of the analog broadcast signal is replaced with the time information of the digital broadcast signal. A television broadcast receiver characterized by being superimposed on a display screen.   2. The television broadcast receiver according to claim 1, wherein the time information superimposing means displays an icon for notifying that the time information of the analog broadcast signal is replaced with the time information of the digital broadcast signal. A television broadcast receiver characterized by being superimposed on a display screen.   2. The television broadcast receiving apparatus according to claim 1, wherein the time information superimposing means replaces the replaced digital broadcast in order to clearly indicate that the time information of the analog broadcast signal has been replaced with the time information of the digital broadcast signal. A television broadcast receiver characterized by processing a display form of signal time information.   2. The television broadcast receiver according to claim 1, wherein the time information superimposing unit superimposes information indicating a degree of difference between the two time information on the analog broadcast signal. .   2. The television broadcast receiver according to claim 1, wherein the comparing means determines whether or not the difference between the two time information is within a predetermined range, and the time information superimposing means is A television broadcast receiving apparatus, wherein when it is determined that the difference exceeds a predetermined range, the time information of the analog broadcast signal is replaced with the time information of the digital broadcast signal.   2. The television broadcast receiver according to claim 1, further comprising a time measuring means for measuring time, and when the time information by the time measuring means is different from the time information of the digital broadcast signal, the time information of the digital broadcast signal. The television broadcast receiver is characterized in that the time information of the time measuring means is corrected based on the above.   8. The television broadcast receiving apparatus according to claim 1, wherein the analog broadcast signal is a teletext broadcast, and the digital broadcast signal is a terrestrial digital broadcast. John broadcast receiver.   Time information by a television broadcast receiving device comprising analog broadcast receiving means for receiving an analog broadcast signal, digital broadcast receiving means for receiving a digital broadcast signal, and display means for displaying the analog broadcast signal or the digital broadcast signal In the replacement method, the step of extracting time information included in the analog broadcast signal, the step of extracting time information included in the digital broadcast signal, the step of comparing the two extracted time information, If the time information is different, the time information of the digital broadcast signal is superimposed on the display screen related to the analog broadcast signal instead of the time information of the analog broadcast signal, and the time information of the digital broadcast signal is superimposed. Displaying the analog broadcast signal thus displayed on the display means. Time information difference replacement method characterized by.

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