JP2006174259A - Dvd recorder, time detecting apparatus, satellite broadcast receiver and television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correct a time without being largely influenced by the propriety of reception of broadcast with a simple configuration. <P>SOLUTION: A DVD recorder 100 includes: a time counting circuit 126 for detecting time; an antenna 190 for receiving a broadcast signal of television broadcast; a DVD driving circuit 170 for storing the video data based on the broadcast signal received by the antenna 190 into a DVD disk 172; a hard disk device 140 for storing the data of a part contained in the broadcast signal and indicating the time of an image; and a system control circuit 110 for comparing the video data based on the broadcast signal received by the antenna 190 with the data of the part indicating the time stored in the hard disk device 140, and for adjusting the time counting circuit 126 so that the time to be detected by the time counting circuit 126 may coincides with the time corresponding to the data of the part of the image, if any part of the video data coincides with the part of indicating the time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a DVD (Digital Versatile Disc) recorder, a time detection device, a satellite broadcast reception device, and a television receiver, and in particular, a DVD recorder, a time detection device, a satellite broadcast reception device, and a television broadcast reception device. The present invention relates to a television receiver.

  Patent Document 1 includes a channel selection circuit for selecting a broadcast station of a program reserved based on reservation data for recording reservation, and includes reservation data and a broadcast station selected by the channel selection circuit. In the recording apparatus for recording the reserved program based on the comparison output with the identification data inserted in the television signal, the channel selection circuit includes information on the broadcast station of the reserved program and the current time There is disclosed a recording apparatus that selects a broadcasting station that transmits a television signal into which is inserted for a predetermined time while waiting for reserved recording. According to the present invention, the time can be automatically corrected.

  Further, in Patent Document 2, a plurality of tuners, a viewing output device that can output a broadcast signal received and demodulated by the first tuner as a viewing signal, and a plurality of tuners that receive and demodulate. Priorities are set according to the purpose of the receiving and demodulating operations for the recording device that can record the broadcast signal on the recording medium and the receiving and demodulating operations performed by each of the tuners. In such a case, a broadcast receiving apparatus is disclosed that includes a control circuit that causes any of a plurality of tuners to execute the reception / demodulation operation based on the purpose type and priority of the reception / demodulation operation. According to the present invention, the time can be corrected even if the main power supply is turned on at the time designated to correct the time (even if the user receives a broadcast whose time cannot be corrected by the broadcast receiving device).

  However, the invention disclosed in Patent Document 1 has a problem that the time cannot be corrected when the time is significantly out of order. The reason why the time cannot be corrected when the time is significantly out of order is that the signal for correcting the time is not usually the one that specifies the time (the signal that expresses a specific period whose specific time is unknown) (It is not too much). The invention disclosed in Patent Document 1 also has a problem that it is sometimes difficult to correct the time. The reason why it is difficult to correct the time is because it is premised on reception of a television broadcast signal into which information on the current time is inserted.

The invention disclosed in Patent Document 2 has a problem that the structure tends to be complicated. This is because a plurality of tuners are required. The invention disclosed in Patent Document 2 also has a problem that it is sometimes difficult to correct the time. The reason why it is difficult to correct the time is because it is premised on reception of a television broadcast signal into which information on the current time is inserted.
JP-A-8-203158 JP 2004-64478 A

  The present invention has been made to solve the above-described problems, and its purpose is to provide a DVD recorder capable of correcting time without being greatly affected by whether or not a broadcast can be received, and time detection with a simple configuration. An apparatus, a satellite broadcast receiver, and a television receiver are provided.

  In order to achieve the above object, according to one aspect of the present invention, a DVD recorder receives a detection means for detecting time, a reception means for receiving a broadcast signal of a television broadcast, and reception by the reception means. A DVD drive device for storing video data based on the broadcast signal on the optical disc, storage means for storing the portion of the data representing the time of the image included in the broadcast signal, and the broadcast signal received by the reception means Image comparison means for comparing the video data based on the image data and the portion of the image representing the time of the image stored in the storage means; as a result of comparison by the image comparison means, When it is determined that the data matches, the detection procedure is performed so that the time detected by the detection means matches the time corresponding to the data of the image portion. The comprising an adjusting means for adjusting.

  That is, as a result of the comparison by the image comparison means, the adjustment means finds that one of the video data based on the broadcast signal of the television broadcast received by the reception means and the portion of the data representing the time of the image stored by the storage means. If it is determined that the detection is successful, the detection means is adjusted so that the time detected by the detection means matches the time corresponding to the data of the portion representing the time of the image. Receiving video data is less affected by the availability of broadcast reception. Receiving the video data corresponding to the image portion data is less affected by whether or not the broadcast can be received. There are often few errors in the time of receiving video data corresponding to the portion of data representing the time of the image. Receiving video data can be realized with a simple configuration. Thereby, even if it has only a simple configuration, the time can be corrected with a small error and without being greatly affected by whether or not the broadcast can be received. As a result, it is possible to provide a time detection device that can correct the time with a simple configuration and with a small error and without being greatly affected by whether or not the broadcast can be received.

  According to another aspect of the present invention, the time detection device includes a detection unit for detecting time, a reception unit for receiving a broadcast signal, and a specific signal included in the broadcast signal received by the reception unit. Comparing by the image comparison means with the storage means for storing the image data, the image comparison means for comparing the video data based on the broadcast signal received by the reception means and the specific image data stored in the storage means As a result, when it is determined that any one of the video data matches the specific image data, the detection means is set so that the time detected by the detection means matches the time corresponding to the specific image data. Adjusting means for adjusting.

  That is, when the adjustment means determines that any of the video data based on the broadcast signal received by the reception means matches the specific image data stored in the storage means as a result of the comparison by the image comparison means In addition, the detection means is adjusted so that the time detected by the detection means matches the time corresponding to the specific image data. Receiving video data is less affected by the availability of broadcast reception. Receiving video data can be realized with a simple configuration. Thereby, even if it has only a simple configuration, the time can be corrected without being greatly affected by whether or not the broadcast can be received. As a result, it is possible to provide a time detection device that can correct the time with a simple configuration without being greatly affected by whether or not the broadcast can be received.

  The specific image data described above preferably includes data of an image portion.

  That is, as a result of the comparison by the image comparison unit, the adjustment unit determines that any of the video data based on the broadcast signal received by the reception unit matches the data of the image portion stored in the storage unit. In this case, the detection means is adjusted so that the time detected by the detection means matches the time corresponding to the data of the image portion. Receiving video data is less affected by the availability of broadcast reception. Receiving the video data corresponding to the image portion data is less affected by whether or not the broadcast can be received. Thereby, even if it has only a simple configuration, the time can be corrected without being greatly affected by whether or not the broadcast can be received. As a result, it is possible to provide a time detection device that can correct the time with a simple configuration without being greatly affected by whether or not the broadcast can be received.

  Moreover, it is desirable that the above-described image portion includes a portion representing the time of the image.

  That is, as a result of the comparison by the image comparison means, the adjustment means indicates that either of the video data based on the broadcast signal received by the reception means matches the data of the portion representing the time of the image stored by the storage means. When the determination is made, the detection means is adjusted so that the time detected by the detection means matches the time corresponding to the data of the portion representing the time of the image. There are often few errors in the time of receiving video data corresponding to the portion of data representing the time of the image. Thereby, even if it has only a simple configuration, the time can be corrected with a small error and without being greatly affected by whether or not the broadcast can be received. As a result, it is possible to provide a time detection device that can correct the time with a simple configuration and with a small error and without being greatly affected by whether or not the broadcast can be received.

  Moreover, it is preferable that the above-described time detection device further includes a reception unit for receiving designation of image data that is any of video data. The storage means preferably includes means for storing the image data accepted by the accepting means as specific image data.

  Moreover, it is desirable that the above-described time detection device further includes reception means for receiving time. The time corresponding to the specific image data is preferably the time received by the receiving means.

  The above-described time detection device further includes processing means for processing any of the video data and the specific image data so as to blur the image represented by the video data and the image represented by the specific image data. It is desirable. The image comparison means preferably includes means for comparing the video data processed by the processing means with specific image data processed by the processing means.

  That is, the processing means processes any of the video data and the specific image data so as to blur the image represented by any of the video data and the image represented by the specific image data. The image comparison means compares the video data processed by the processing means with the specific image data processed by the processing means. When the adjustment means determines that any of the video data based on the broadcast signal received by the reception means matches the specific image data stored in the storage means as a result of the comparison by the image comparison means, The detection means is adjusted so that the time detected by the detection means matches the time corresponding to the specific image data. Thereby, the influence of the content of the image represented by any of the video data on the comparison by the image comparison means is reduced. Since the influence is small, the time can be corrected without being greatly affected by the contents of the image represented by any of the video data even if only a simple configuration is provided. As a result, it is possible to provide a time detection device that can correct the time with a simple configuration without being greatly affected by the content of the image represented by any of the video data and the availability of broadcast reception.

  When the other situation of this invention is followed, a satellite broadcast receiver contains the above-mentioned time detection apparatus.

  When the other situation of this invention is followed, a television receiver contains the above-mentioned time detection apparatus.

  The DVD recorder, the time detection device, the satellite broadcast reception device, and the television receiver according to the present invention can correct the time with a simple configuration without being greatly affected by whether or not the broadcast can be received.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  With reference to FIG. 1, a DVD recorder 100 which is an aspect of a time detection device according to an embodiment of the present invention will be described. FIG. 1 is a block diagram showing a hardware configuration of DVD recorder 100.

  The DVD recorder 100 includes a memory 112 for storing data, a system control circuit 110 for executing a predetermined process based on the stored data and an instruction input from the outside, and time and time from the outside. An operation unit 122 for receiving input such as designation of image data which is one of video data to be described later, and a remote control signal and outputting a predetermined control signal to the system control circuit 110, the time and later described A light receiving unit 124 that accepts designation of image data that is one of video data, a time measuring circuit 126 for detecting a time and outputting a signal representing the time to the system control circuit 110, and an operating state of the DVD recorder 100 A display unit 128 for displaying information representing the power source and a power source unit 129 are included. The operation state displayed on the display unit 128 is, for example, time information in the DVD recorder 100, a program recording state, and the like. The power supply unit 129 receives a command signal from the system control circuit 110 and supplies power to each hardware.

  Referring again to FIG. 1, DVD recorder 100 further receives an antenna 190 for receiving a broadcast signal, a tuner 130 for selecting a predetermined radio wave from the received radio wave, and an input of video and audio signals from the outside. For storing digital data based on an instruction from the system control circuit 110, an external input unit 132 for encoding, an MPEG (Moving Picture Experts Group) encoder 152 for compressing an input signal based on predetermined processing, and the system control circuit 110 Hard disk device 140, DVD drive device 170 for storing and reproducing video data and audio data based on a broadcast signal received by an antenna on an optical disc (DVD disc 172 in the present embodiment), and compression MPEG decoder 154 for decoding the video / audio signal being recorded, and a video display image An OSD (On Screen Display) image generation circuit 114 for generating a signal for displaying the operating state of the DVD recorder 100 and other information on the screen, a signal generated by the OSD image generation circuit 114 and an output signal from the MPEG decoder 154 Can be connected to a synthesis circuit 158 for synthesizing and outputting, a D / A (Digital to Analog) converter 160 for converting an input digital signal into an analog signal, and a transmission cable 192. And an output unit 168 for outputting a video / audio signal. DVD recorder 100 is connected to television 400 via transmission cable 192. The hard disk device 140 includes a data recording / reproducing head 142 for recording and reproducing data, and a hard disk 144 as a recording medium for storing data.

  FIG. 2 is a flowchart showing a flow of time correction processing executed by the system control circuit 110 of the DVD recorder 100 in the present embodiment.

  Referring to FIG. 2, system control circuit 110 uses video data (hereinafter “received video”) based on a broadcast signal acquired from MPEG encoder 152 (that is, received by antenna 190) at regular intervals, for example, a hard disk. The specific image data stored in 144 (hereinafter referred to as “stored image”) is compared (step S2). This stored image will be described in detail later.

  In step S2, for example, the image of one frame represented by the received video (moving image) and the image represented by the stored image are each blurred, and the data of one frame of the blurred image is superimposed and compared on a one-to-one basis. It shall be. In order to blur these images, the system control circuit 110 processes video data (referred to as “frame data”) representing one frame of a received video (moving image) and a stored image. In the case of the present embodiment, the system control circuit 110 preferably selects one of a plurality of predetermined colors (the closest color among those colors) as the color of the pixels constituting the image. If there are two, it is desirable that the color be different from that of the adjacent pixel.) The frame data and the stored image are processed. The image comparison is not limited to such a method, and can be performed using a known technique. Further, information on a plurality of points constituting each image data may be converted into wave information and compared. In this way, even if the received video and the stored image do not completely match, it can be determined that they are the same if they are similar images. In addition, since the broadcast cannot be properly received, it can be determined that the received images are identical even if the received video includes noise.

  System control circuit 110 waits until it detects that the received video matches the stored image (NO in step S4).

  If the system control circuit 110 detects that the received image and the stored image match (YES in step S4), the system control circuit 110 determines whether or not the time corresponding to the stored image and the time detected by the timing circuit 126 match. Judgment is made (step S6).

  In step S6, the system control circuit 110 ends the process when the time corresponding to the stored image matches the time detected by the time measuring circuit 126. As a result, normal processing (such as video recording and playback) can be performed. On the other hand, if not, the system control circuit 110 adjusts the time measuring circuit 126 so that the time corresponding to the stored image matches the time detected by the time measuring circuit 126 (step S10).

  Thereby, the system control circuit 110 corresponds to the time detected by the time measuring circuit 126 and the specific image data when it is determined that one of the video data matches the specific image data as a result of the comparison. The timing circuit 126 is adjusted so that the times coincide. Therefore, even when there is an error in the time detected by the time measuring circuit 126, the time can be automatically corrected.

  Here, the stored image will be described. In the present embodiment, the stored image is set by the user from video data stored in the hard disk 144 or the DVD disk 172, for example. FIG. 3 is a diagram showing a flow of stored image setting processing executed by the system control circuit 110 in the embodiment of the present invention. Note that the process shown in FIG. 3 is a process that is started when the stored image setting process is selected by the user using, for example, a remote controller (not shown).

  Referring to FIG. 3, system control circuit 110 first displays a list of video data titles stored in hard disk 144 (step S12). Next, it is determined whether or not a title has been designated by the user (step S14). The system control circuit 110 waits until it is detected that a title has been designated by the user (NO in step S14).

  When the system control circuit 110 detects that a title has been designated (YES in step S14), the system control circuit 110 displays a stored image setting screen (step S16). Next, the designated title is reproduced (step S18). The system control circuit 110 determines whether an image is designated by the user (step S20). The system control circuit 110 plays the designated title until it is detected that an image is designated by the user (NO in step S20).

  When the system control circuit 110 detects that an image is designated by the user (YES in step S20), the system control circuit 110 stops the reproduction (step S22). The designated image data is stored in the hard disk 144 as a stored image (step S24). As a result, the hard disk 144 stores specific image data included in the broadcast signal received by the antenna 190. Here, the image data stored as the stored image may be, for example, an intra-frame-coded I picture.

  Next, the system control circuit 110 determines whether or not a time corresponding to the designated image data has been set by the user (step S26). System control circuit 110 waits until it is detected that the time has been set by the user (NO in step S26).

  When the system control circuit 110 detects that the time is set by the user (YES in step S26), the system control circuit 110 stores the set time in association with the stored image stored in step S24 (step S28).

  In the present embodiment, it is assumed that the stored image and the time are stored in association with the management area of the hard disk 144, respectively. If the stored image is associated with the time, it may be stored in another area. Further, the stored image and the time may be stored in a nonvolatile memory in the memory 112, for example.

  FIG. 4 is a diagram showing an example of the stored image setting screen displayed in step S16 of FIG. In the display area 31, the title name designated in step S14 is displayed. In the display area 32, the video reproduced in step S18 is displayed. In the display area 33, the position of the video displayed in the display area 32 among the designated titles is displayed. In addition, a time display 34 is displayed on the stored image setting screen. The time display 34 displays the set time.

  Thus, by providing the stored image setting screen for setting the stored image, the user can easily set the stored image.

  Referring to FIG. 4, if the user selects, for example, “News 8:00” from the titles displayed on the screen of television 400 (step S12 in FIG. 3), the title is displayed in display area 31. The name is displayed (step S16). While viewing the video reproduced and displayed in the display area 32, the user designates an image to be stored, for example, with a remote controller (not shown) (S20). For example, if the user wants to set the time based on the title display of “News 8:00” every day, an image when the title display is displayed is designated.

  When the image is designated in this way, the reproduction of the display area 32 is stopped. When the reproduction is stopped, the system control circuit 110 displays a plurality of boundary lines 35 in the display area 32. FIG. 5 is a diagram illustrating an image in which the boundary line 35 is displayed. When the boundary line 35 is displayed, the system control circuit 110 moves the boundary line 35 in accordance with the above-described designation with the cursor key of the remote controller (step S22), and the position of the boundary line 35 in the image is determined. The portion surrounded by the boundary line 35 at the time of confirmation (in this case, “8:00”, the portion representing the time when the broadcast station transmitted data representing one frame of the video data was enclosed) In this embodiment, when it is desired to designate the entire image, the boundary line 35 is moved to the outer periphery of the display area 32. The image data is a stored image (that is, the specific image data described above). ) Is stored (S24). As a result, the hard disk 144 stores the image data received by the light receiving unit 124 as specific image data. Then, when the user sets the time corresponding to the stored image with the above-described remote controller or the like (S26), the set time (that is, the time received by the light receiving unit 124) is set to the time corresponding to the specific image data described above. And stored in association with the stored image (step S28). In the case of the above example, the user is likely to set the time to “8 o'clock”. However, when the user wants to advance (or delay) the time detected by the clock circuit 126, the time set by the user is a time other than “8 o'clock”.

  As described above, the DVD recorder according to the present embodiment can automatically correct the time. In correcting the time, it is not particularly necessary to receive a signal representing the time. Since it is not necessary to receive a signal representing the time, the time can be corrected without receiving a specific broadcast. Since it is not necessary to receive a specific broadcast, a complicated configuration is not required. It is not greatly affected by the availability of broadcast reception. As a result, it is possible to provide a DVD recorder capable of correcting the time with a simple configuration without being greatly affected by whether or not the broadcast can be received.

  The stored image setting method is not limited to the above example. For example, a stored image may be set from video data stored on the DVD disk 172. In this case, a preset chapter can also be used. FIG. 6 is a diagram illustrating another example of the stored image setting screen. Referring to FIG. 6, chapter images A to F are displayed on the screen of television 400. Further, the time display 34 shown in FIG. 4 is displayed. The user selects one image from the displayed chapter images. When an image is selected, a screen similar to that shown in FIG. 5 is displayed, and the setting of the image to be stored is accepted. Thereby, a stored image can be set. Image data set by the user is stored in the management area of the hard disk 144 as a stored image. Similarly to FIG. 5, when the user sets the time, the time corresponding to the stored image is determined.

  In addition, a button dedicated to setting a stored image may be provided on a remote controller (not shown). For example, during playback of video data stored on the hard disk 144 or the DVD disk 172, the stored image can be determined and stored by pressing this dedicated button. In this case, the stored image is stored in the management area or the like of the hard disk 144 and then stored in association with the time.

  Further, the stored image may be stored in advance regardless of the user. For example, it represents image data of an image broadcast when a broadcast station starts (or ends) broadcast, image data of a test pattern, image data of an image broadcast at the start of a news program, and time The time can be automatically corrected by storing in advance the image data of the image (the image that digitally displays the time and the image on the clock board are both images representing the time). In particular, an image broadcast at the start of a news program is particularly desirable as an image to be stored in advance because it is less affected by other programs (and is often broadcast at a specific time).

  In S2, comparison may be made without blurring the images.

  Further, if there is an image that the user has regularly viewed a predetermined number of times in the past (for example, an image viewed continuously for three days or more), the image data of the image may be stored as a stored image. In this case, the time at which the image is broadcast may be stored in association with the stored image.

  In the present embodiment, the hard disk device 140 and the DVD drive device 170 are included. However, the time detection device according to the present invention may be the hard disk device 140 alone, or only the DVD drive device 170. It doesn't matter.

(Modification)
A modification of the embodiment of the present invention will be described with reference to FIG. FIG. 7 is a block diagram showing a hardware configuration of a television receiver (hereinafter referred to as “TV”) 1000 having a built-in DVD recorder 200 which is one mode of the time detection device.

  Referring to FIG. 7, television 1000 according to the modification of the embodiment of the present invention includes monitor unit 4000 in addition to DVD recorder 200. Further, the DVD recorder 200 includes an internal interface 268 instead of the output unit 168 included in the DVD recorder 100 described with reference to FIG. The internal interface 268 converts and adjusts the signal from the D / A conversion unit 160 into a signal that can be displayed on the monitor unit 4000. Since other configurations and operations are the same as those in the above embodiment, description thereof will not be repeated.

  When the time is set in step S10 of FIG. 2, television 1000 according to the modification of the embodiment of the present invention displays an image based on a broadcast signal received via antenna 190 and tuner 130 via internal interface 268. Via the monitor unit 4000.

  Therefore, it becomes possible to prevent forgetting to watch more.

  In the embodiment of the present invention, the image comparison is performed. However, the timer circuit 126 may be adjusted by comparing the audio signals.

  Moreover, the structure by which the time detection apparatus mentioned above is incorporated in the satellite broadcast receiver (reception converter) like a set top box may be sufficient. In this case, at least the DVD drive device 170 may be omitted.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a block diagram showing the hardware constitutions of the DVD recorder which concerns on embodiment of this invention. It is a flowchart which shows the flow of the correction process of the time which the system control circuit of the DVD recorder which concerns on embodiment of this invention performs. It is a figure which shows the flow of the memory | storage image setting process which a system control circuit performs in embodiment of this invention. It is a figure which shows the example of a memory | storage image setting screen (the 1). It is a figure which shows a memory | storage image setting screen (the 2). It is a figure which shows the other example of a memory | storage image setting screen (the 1). It is a block diagram showing the hardware constitutions of the television which concerns on the modification of embodiment of this invention.

Explanation of symbols

  31, 32, 33 Display area, 34 Time display, 35 Border, 100, 200 DVD recorder, 110 System control circuit, 112 Memory, 114 OSD image generation circuit, 122 Operation unit, 124 Light receiving unit, 126 Clock circuit, 128 Display unit, 129 power supply unit, 130 tuner, 132 external input unit, 140 hard disk device, 142 data recording / reproducing head, 144 hard disk, 152 MPEG encoder, 154 MPEG decoder, 158 synthesis circuit, 160 D / A conversion unit, 168 output unit 170 DVD drive, 172 DVD disk, 190 antenna, 192 transmission cable, 400, 1000 TV, 4000 monitor unit.

Claims (9)

Detection means for detecting time;
Receiving means for receiving a broadcast signal of a television broadcast;
A DVD drive device for storing video data based on the broadcast signal received by the receiving means on an optical disc;
Storage means for storing data of a portion representing the time of an image included in the broadcast signal;
Image comparing means for comparing the video data based on the broadcast signal received by the receiving means and the portion of data representing the time of the image stored in the storage means;
As a result of the comparison by the image comparison means, when it is determined that any one of the video data and the data of the portion representing the time of the image match, the time detected by the detection means and the part of the image A DVD recorder comprising: adjusting means for adjusting the detecting means so that the times corresponding to the data of the data coincide with each other. Detection means for detecting time;
Receiving means for receiving a broadcast signal;
Storage means for storing specific image data included in the broadcast signal received by the receiving means;
Image comparing means for comparing the video data based on the broadcast signal received by the receiving means and the specific image data stored in the storage means;
As a result of the comparison by the image comparison means, when it is determined that any one of the video data matches the specific image data, it corresponds to the time detected by the detection means and the specific image data. A time detecting device including adjusting means for adjusting the detecting means so that the times coincide.   The time detection device according to claim 2, wherein the specific image data includes data of an image portion.   The time detection apparatus according to claim 3, wherein the part of the image includes a part representing a time of the image. The time detection device further includes accepting means for accepting designation of image data that is any of the video data,
The time detection apparatus according to claim 2, wherein the storage unit includes a unit for storing the image data received by the reception unit as the specific image data. The time detection device further includes reception means for receiving time,
The time detection apparatus according to claim 2, wherein the time corresponding to the specific image data is a time received by the reception unit. The time detection device further includes processing means for processing any of the video data and the specific image data so as to blur an image represented by the video data and the image represented by the specific image data. Including
The time detection apparatus according to claim 2, wherein the image comparison unit includes a unit for comparing the video data processed by the processing unit with specific image data processed by the processing unit.   A satellite broadcast receiving apparatus including the time detection apparatus according to claim 2.   A television receiver comprising the time detection device according to claim 2.

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