JP2013251760A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent missing of a scene where a change amount of a sound volume exceeds a threshold in respective scenes of a TV program in the middle of viewing, to suppress manufacture cost and to reduce trouble of an operation by a user in an image display device.SOLUTION: When a TV receiver operates at a notice addition mode (YES in S1), it delays a video and sound of a TV program, which are read from a video buffer memory and a sound buffer memory, by only five seconds later than real time, and outputs them to a display and a speaker (S2). The TV receiver detects a change of the sound volume of the respective scenes of the TV program (S3). When a climax scene and a quiet scene are detected (YES in S4), the TV receiver informs a user of effect that the climax scene and the quiet scene are outputted two seconds before the output of climax scene and the quiet scene (S5). The notice is given by outputting the sound of "pong" and the sound of cheer from a speaker 15, for example.

Description

  The present invention relates to an image display device that assists a user in preventing a desired scene of a program from being missed.

  When a user is watching a sports program broadcast in real time, he keeps an eye on the television (hereinafter referred to as TV) receiver, so that a climax scene (for example, a scene before a goal in soccer or baseball) If you are hitting a home run, you may miss it, and you may feel very regrettable. In addition, the user may miss a quiet scene such as a sad scene of a drama, for example.

  As a countermeasure for the above case, a method of viewing a sports program while recording the sports program is known. According to this method, even if a missed scene is missed, the user can surely view the exciting scene by playing the recorded sports program. However, this method requires an operation for recording a sports program, which is troublesome for the user. In addition, this method needs to record all sports programs, so a memory, a hard disk or the like with a large storage capacity is required, and there is a problem that the manufacturing cost of the TV receiver increases.

  As another countermeasure, a method of viewing a scene missed by the user at a sports corner of a news program can be considered. However, in this method, a missed scene may not be broadcast in the sports corner of a news program, so the user may not be able to view a desired scene. As for the silent scene, as described above, measures for preventing the overlooked scene from being overlooked can be considered. However, it may be troublesome for the user and the silent scene may not be viewed.

JP 2007-116567 A JP 2003-134415 A Japanese Patent Laid-Open No. 2001-212398 JP 2009-141586 A

  In order to solve the above problem, Patent Document 1 discloses a content providing apparatus that detects the excitement of a back program to be recorded and notifies the user so that the scene of the back program can be confirmed on the spot. It is disclosed. However, since this content providing apparatus notifies the user of the excitement of the back program, the user cannot prevent the excitement of the TV program being watched or the silent scene from being overlooked. Therefore, this content providing apparatus cannot solve the above problem.

  Further, Patent Document 2 has a plurality of tuners, can simultaneously receive program information of a plurality of channels, displays a video (main screen) selected by the first tuner, and uses the second tuner. Record the selected video (subscreen) on the recording medium, detect when the recorded video (subscreen) becomes a specific scene (highlight scene), recognize it, and respond to user operations Thus, there is disclosed a TV receiver that plays back video recorded on a recording medium before a specific scene. However, in this TV receiver, when the video on the sub-screen becomes a highlight scene, the scene is reproduced by the user's operation. Therefore, the user can view the TV program being viewed (main screen). It is impossible to prevent oversight of climax scenes and quiet scenes. Therefore, this TV receiver cannot solve the above problem.

  Further, Patent Document 3 reads in-screen information as a keyword from a scene similar to a desired scene of a back program signal, and the in-screen information extracted from the back program signal by the in-screen information extraction unit. There is disclosed a digital broadcast receiver that displays a back program including a scene in which information in a screen matches with the display unit by supplying a detection signal to a presentation method designating unit when the information is compared and matched. . However, since this digital broadcast receiver displays a desired scene of the back program, the user cannot prevent the swell scene or quiet scene of the TV program being watched from being overlooked. Therefore, this digital broadcast receiver cannot solve the above problem.

  Further, in Patent Document 4, before a predetermined scene of moving image data is displayed, the multimedia data is stored in the storage unit, and the predetermined scene is detected from the stored multimedia data. There is disclosed a multimedia data reproducing method for notifying a user in advance that a predetermined scene starts before the scene is displayed. However, in this multimedia data reproduction method, it is necessary to store the multimedia data in order to detect a predetermined scene from the multimedia data, so that a large memory capacity is required. Therefore, the manufacturing cost cannot be suppressed.

  The present invention has been made to solve the above-described problems, and overlooks a scene in which the amount of change in volume exceeds a threshold among the scenes of a TV program being viewed by a user without impairing real-time performance. An object of the present invention is to provide an image display device that can prevent manufacturing, reduce manufacturing costs, and reduce the amount of time and effort of operations by a user.

  In order to achieve the above object, the invention of claim 1 provides a receiving means for receiving a broadcast signal, a video display means for displaying a video of a program based on the broadcast signal, and a sound of the program based on the broadcast signal. Audio output means, memory for storing video and audio of the program based on the broadcast signal received by the receiving means, video and audio of the program read from the memory, video display means and audio output means Output control means for controlling the output so as to be delayed for each of the above, and detection means for detecting a scene in which the amount of change in volume exceeds a threshold among the scenes of the program based on the broadcast signal received by the receiving means; When the scene where the amount of change in the volume exceeds the threshold is detected by the detecting means, the output control means detects the image corresponding to the detected scene. And an informing means for informing the user in advance that the amount of change in volume exceeds the threshold before audio is output to the video display means and the audio output means. .

  The invention of claim 2 is the image display device according to claim 1, wherein the notifying means outputs a sound for notifying the user in advance that the amount of change in volume exceeds the threshold. The sound is output from the sound output means.

  According to a third aspect of the present invention, in the image display device according to the first aspect, when the detection unit detects a scene in which the amount of change in volume exceeds the threshold due to an increase in volume, the notification unit The volume of the program audio output from the audio output means before the video and audio of the program corresponding to the scene detected by the detection means are output to the video display means and the audio output means. Is larger than before.

  According to a fourth aspect of the present invention, in the image display device according to the first aspect, the informing means sends a message for informing the user in advance that the volume change amount exceeds the threshold. It is displayed on the video display means.

  Further, the invention of claim 5 is the image display device according to any one of claims 1 to 4, further comprising detection means for detecting a user existing near the image display device, wherein the detection means When the presence of the user is not detected for a predetermined time or longer, the output control means delays and outputs the video and audio of the program read from the memory to the video display means and the audio output means, respectively. And the detection means detects a scene where the amount of change in volume exceeds the threshold among the scenes of the program based on the broadcast signal received by the reception means, and the notification means includes the output control means. Therefore, before the video and audio corresponding to the detected scene are output to the video display means and the audio output means, the amount of change in volume exceeds the threshold value. It is intended to inform the user in advance to the effect that become that scene.

  According to a sixth aspect of the present invention, in the image display device according to any one of the first to fifth aspects, the image display apparatus further includes a threshold setting unit configured to set the threshold value.

  The invention according to claim 7 is the image display device according to any one of claims 1 to 6, further comprising notification setting means for setting whether or not to notify the user by the notification means. It is to be prepared.

  The invention according to claim 8 is the image display device according to any one of claims 1 to 7, further comprising notification timing setting means for setting a timing at which the notification means notifies the user. Is.

  According to the present invention, when a scene in which the amount of change in volume exceeds a threshold value is detected, before the video and audio corresponding to the detected scene are output to the video display means and the audio output means, The user is notified in advance that the volume change amount exceeds the threshold. For this reason, for example, when a scene in which the amount of change in volume exceeds a threshold value is detected while watching a sports program, the user can make this excitement before a climax scene that increases cheer (volume) is output. You can know that the scene will be output. In addition, for example, when a scene in which the amount of change in volume exceeds the lower limit of the threshold is detected while watching a drama, the user can output this before a quiet scene such as a sad scene of the drama is output. You can also know that a quiet scene is output. Therefore, since the user can watch the exciting scenes and quiet scenes by watching the program after receiving this notification, the exciting scenes and quiet scenes of the program being watched without losing the real-time property. Can be overlooked.

  In addition, according to the present invention, it is possible to know that a user will be in a climax scene or a quiet scene without performing a playback operation of a climax scene or a quiet scene of a program that the user is watching, You can watch a quiet scene. Therefore, it is possible to reduce the time and effort of the operation by the user. Further, according to the present invention, since only the video and audio of the program to be delayed need be stored in the memory, the memory capacity of the memory can be reduced compared to the case where all the programs are stored. Therefore, manufacturing cost can be suppressed.

1 is a perspective view showing a TV receiver and a remote control device according to a first embodiment of the present invention. The block diagram which shows the internal structure of the said TV receiver. The block diagram which shows the information stored in the memory of the said TV receiver. The block diagram which shows the internal structure of the control part of the said TV receiver. The block diagram which shows the internal structure of the video / audio output part of the said TV receiver. The graph explaining an example of the detection operation | movement of the excitement scene and quiet scene in the said TV receiver. The flowchart which shows the procedure of the process of the output operation | movement of TV program in the said TV receiver. Explanatory drawing which shows an example of the information screen displayed on the display of the said TV receiver. The graph explaining adjustment of the sound volume in the said TV receiver. The block diagram which shows the internal structure of TV receiver which concerns on the 2nd Embodiment of this invention. The flowchart which shows the procedure of the process at the time of normal operation | movement in the said TV receiver.

  Hereinafter, a television receiver (image display device) according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a television receiver (hereinafter referred to as a TV receiver) 1 according to the first embodiment and a remote control device (threshold setting means, notification setting means, notification timing setting means) for operating the TV receiver 1. ) 4 and FIG. 2 shows an electrical block configuration of the TV receiver 1. FIG. 3 shows each piece of information stored in the memory 17, and FIG. 4 shows the configuration of the control unit (output control means) 10. FIG. 5 shows a configuration of the video / audio output unit 10a.

  As shown in FIG. 2, the TV receiver 1 is connected to an antenna 11, a tuner unit (reception unit) 12 that receives a digital broadcast signal, a decoder unit 13, and a display (video display unit) 14 that displays an image. And a speaker (sound output means) 15 for outputting sound. The TV receiver 1 further includes a remote control signal receiving unit 16 for receiving a remote control signal transmitted from the remote control device 4, a memory 17, and a control unit 10.

  The remote control device 4 has a plurality of operation buttons operated by the user, and transmits a remote control signal corresponding to the operation buttons operated by the user to the TV receiver 1. The user can operate the remote control device 4 to give an instruction to change the operation mode, set various times, and the like.

  The tuner unit 12 receives the digital broadcast signal of each channel distributed from the broadcast station via the antenna 11. The decoder unit 13 performs a demodulation process, an error correction process, and the like on the digital broadcast signal received by the tuner unit 12 and separates a necessary TS (transport stream) packet from the multiplexed signal. (Not shown), a video decoding circuit (not shown) that decodes each separated TS packet, an audio decoding circuit (not shown), a data decoding circuit (not shown), and the like. .

  The video decoding circuit performs a decoding process on the TS packet including the video signal, extracts the video signal, and outputs the extracted video signal to the control unit 10. The audio decoding circuit performs a decoding process on the TS packet including the audio signal, extracts the audio signal, and outputs the extracted audio signal to the control unit 10.

  The data decoding circuit performs a decoding process on a TS packet including SI (Service Information) data, extracts SI data, and outputs the extracted SI data to the control unit 10. The SI data includes an EIT (Event Information Table) in which program information of TV programs is stored. In addition, the data decoding circuit extracts data of the data broadcast information and outputs the extracted data broadcast information data to the control unit 10.

  The display 14 displays a video of a TV program received by the tuner unit 12, various messages for informing the user, a menu screen for performing various settings, and the like. The speaker 15 outputs the sound of the TV program received by the tuner unit 12 and the sound for notifying the user.

  The remote control signal receiving unit 16 converts an infrared signal, which is a remote control signal received from the remote control device 4, into an electrical signal and transfers it to the control unit 10. The remote control signal transmitted from the remote control device 4 is a remote control signal corresponding to the operation button operated by the user.

  As shown in FIG. 3, the memory 17 stores a program 17a for operating the control unit 10, a delay time 17b, a volume change threshold (threshold) 17c, and a notification start time 17d.

  In the delay time 17b, a delay time when the video and audio of the TV program are delayed and output to the display 14 and the speaker 15 is stored. Specifically, for example, when the delay time 17b is “5 seconds”, the video and audio of the TV program are output to the display 14 and the speaker 15 with a delay of 5 seconds from real time. The delay time 17b can be set to an arbitrary time by the user operating the remote control device 4.

  The volume change threshold value 17c stores a threshold value used when detecting the volume change amount of each scene of the TV program. The volume change threshold 17c can be set to an arbitrary value or range by operating the remote control device 4 by the user.

  At the notification start time 17d, a scene in which the amount of change in the volume of the TV program exceeds the volume change threshold 17c, that is, a scene in which the volume increases rapidly (hereinafter referred to as a climax), or a scene in which the volume decreases rapidly (hereinafter referred to as “scene”). When the user is informed in advance that the scene is quiet, the time for starting the notification is stored. Specifically, for example, when the notification start time 17d is “2 seconds”, the user is informed that the climax scene will start 2 seconds before the video and audio of the climax scene are output from the display 14 and the speaker 15. Informed. The notification start time 17d can be set to an arbitrary value by the user operating the remote control device 4.

  The control unit 10 includes a video / audio output unit (output control unit) 10a, a time setting unit 10b for setting a delay time 17b, a notification start time 17d, and the like based on an instruction operation of the remote control device 4 by the user, and a user And a threshold value setting unit 10c for setting the volume change threshold value 17c based on the instruction operation of the remote control device 4 by controlling each part of the TV receiver 1. Further, the control unit 10 has various operation modes such as a normal operation mode for performing a normal operation and a notification addition mode. When operating in the notification addition mode, the control unit 10 outputs the video and audio of the TV program to the display 14 and the speaker 15 with a delay time 17b from the real time. On the other hand, when operating in the normal operation mode, the control unit 10 outputs the video and audio of the TV program to the display 14 and the speaker 15 in real time without delaying. The user can select various operation modes such as a normal operation mode and a notification addition mode by operating the remote control device 4.

  As shown in FIG. 5, the video / audio output unit 10 a includes a video buffer memory (memory) 21, an audio buffer memory (memory) 22, and an audio signal analysis unit (detection unit) 23. The video buffer memory 21 temporarily stores the video signal output from the decoder unit 13. The audio buffer memory 22 temporarily stores the audio signal output from the decoder unit 13.

  When the video / audio output unit 10a operates in the notification addition mode, the video signal and audio signal of the TV program read from the video buffer memory 21 and the audio buffer memory 22 are displayed on the display 14 and the speaker 15, respectively. The output is delayed by a delay time 17b from the real time.

  On the other hand, when operating in the normal operation mode, the video / audio output unit 10a does not delay the video signal and audio signal of the TV program read from the video buffer memory 21 and the audio buffer memory 22 in real time. Is output to each of the display 14 and the speaker 15.

  When operating in the notification addition mode, the audio signal analysis unit 23 determines the volume change threshold value 17c based on the audio signal output from the decoder unit 13 based on the volume change amount of each scene of the TV program being viewed by the user. Detect scenes that exceed. Specifically, the audio signal analysis unit 23 is a scene where the amount of change in the volume of each scene of the TV program exceeds the upper limit of the volume change threshold 17c (rising scene), or a scene where the volume change threshold 17c exceeds the lower limit (silent). Scene).

  In addition, when the audio signal analysis unit 23 operates in the notification addition mode, when the user detects an exciting scene or a quiet scene from the TV program that the user is watching, a video for informing the user in advance. Is displayed on the display 14. That is, the audio signal analysis unit 23 superimposes the video for notifying the user on the video based on the video signal read from the video buffer memory 21.

  Further, when the audio signal analysis unit 23 detects an exciting scene or a quiet scene from the TV program that the user is viewing, the audio signal analysis unit 23 causes the speaker 15 to output a sound for informing the user in advance. That is, the audio signal analysis unit 23 superimposes audio for informing the user on audio based on the audio signal read from the audio buffer memory 22. When the user detects a lively scene or a quiet scene from the TV program being watched, both video and audio for notifying the user may be output, or only one of them may be output. It can be arbitrarily set by the user.

  Next, an example of an operation for detecting a rising scene or a quiet scene by the audio signal analysis unit 23 will be described with reference to FIG. FIG. 6 is a graph showing the amount of change in volume per unit time (hereinafter referred to as volume change level) in a TV program being watched by the user. The vertical axis in FIG. 6 indicates the volume change level, and the horizontal axis indicates time. Here, it is assumed that the “volume change level is in the range of 10 to 30” is set in the volume change threshold 17c. That is, the range where the volume change level is 10 to 30 is a so-called dead zone that is not detected by the audio signal analysis unit 23.

  The audio signal analysis unit 23 detects a scene where the volume change level exceeds 30 as a “swelling scene”. The audio signal analysis unit 23 detects a scene having a volume change level of less than 10 as a “silent scene”. That is, in the case of the volume change level graph shown in FIG. 6, the audio signal analysis unit 23 detects the scene in the time zone Ta as a “swelling scene” and the scene in the time zone Tb is a “silent scene”. Is detected. Note that the audio signal analysis unit 23 compares a value obtained by differentiating a graph indicating a change in volume with respect to time with a value set in the volume change threshold 17c, for example, to increase the scene of excitement or quietness. A scene may be detected.

  Next, the TV program output operation in the TV receiver 1 will be described with reference to the flowchart shown in FIG. Here, it is assumed that the TV receiver 1 is receiving a TV program based on the digital broadcast signal of the channel selected by the user. Further, it is assumed that “5 seconds” is set in the delay time 17b, and “2 seconds” is set in the notification start time 17d.

  When the control unit 10 is operating in the notification addition mode (YES in S1), the video and audio of the TV program read from the video buffer memory 21 and the audio buffer memory 22 are read using the video / audio output unit 10a. The process of outputting to each of the display 14 and the speaker 15 is started with a delay of 5 seconds from the real time (S2).

  And the control part 10 detects the change of the volume of each scene of the TV program currently received from the tuner part 12 using the audio | voice signal analysis part 23 (S3). When the control unit 10 detects a scene where the amount of change in the volume exceeds the upper limit of the volume change threshold 17d (a rising scene) (YES in S4), the video and audio corresponding to the rising scene are displayed on the display 14 and the speaker 15. The user is informed that the scene is going to rise 2 seconds before the time when it is output to (S5). Note that the process of delaying and outputting the TV program (S2) and the processes of S3 to S5 are performed in parallel. In other words, an exciting scene is notified while a TV program is delayed and output. In S3, when a scene where the amount of change in volume exceeds the lower limit of the volume change threshold value 17d (silent scene) is detected (corresponding to YES in S4), the control unit 10 responds to this silent scene. The user can be informed that the scene is going to be exciting 2 seconds before the video and audio are output to the display 14 and the speaker 15 (corresponding to S5 above).

  The notification in S5 causes the speaker 15 to output, for example, a sound “Pawn” or a cheer sound “Wow”. Alternatively, the user may previously store a desired sound in the memory 17 and output this sound from the speaker 15.

  On the other hand, when the control unit 10 is not operating in the notification addition mode, that is, when operating in the normal operation mode (NO in S1), the control unit 10 uses the video / audio output unit 10a to The normal operation of outputting the sound to the display 14 and the speaker 15 is performed without delaying the sound (S6).

  Next, an example of the notification in S5 will be described with reference to FIGS. As shown in FIG. 8, the notification in S5 may be a notification of a rising scene to the user in advance by displaying a message “Soon a rising scene” on the display 14. In addition, when a silent scene is detected, a message “Soon, quiet scene” may be displayed on the display 14.

  Further, the user may be informed of the excitement by adjusting the volume output from the speaker 15. In FIG. 9, graph A shows the change in volume after adjustment, and graph B shows the change in volume before adjustment (normal time). In FIG. 9, the vertical axis V indicates the volume, and the horizontal axis T indicates time. The graph B in the normal time is a climax scene in which the volume suddenly increases from “5” to “15” at time T1. As shown in the graph A after the adjustment, the volume is increased to “15” from the time T11 that is 2 seconds before the time T1, and is output from the speaker 15. In this way, the volume of a scene that is output before the rising scene is output is set higher than before, thereby informing the user of the output of the rising scene in advance. Note that, in a scene where the volume decreases (for example, after time T2), the adjusted volume is adjusted to be the same as the normal volume.

  As described above, in the TV receiver 1 according to the present embodiment, when a scene (a climax scene, a quiet scene) in which the volume change exceeds the volume change threshold 17c is detected, Before the video and audio corresponding to the quiet scene are output to the display 14 and the speaker 15, the user is notified in advance that the scene is a climax scene or a quiet scene. For this reason, for example, while viewing a sports program, the user can know that the excitement scene in which the cheer (sound volume) increases is output before the excitement scene in which the cheer (volume) increases. The user can also know that this quiet scene is output before a quiet scene such as a sad scene of a drama is output, for example, while watching a drama. Therefore, since the user can watch the climax scene and quiet scene by watching the TV program after receiving this notification, the climax scene and quiet scene of the TV program being watched without losing real-time characteristics. Can prevent missed scenes.

  In addition, according to the TV receiver 1, it is possible to know that the scene is a climax scene or a quiet scene without performing a reproduction operation of a climax scene or a quiet scene of the TV program being watched by the user. You can watch lively and quiet scenes. Therefore, it is possible to reduce the time and effort of the operation by the user. Further, according to the present TV receiver 1, only the video and audio of the TV program for delaying by the delay time 17b are stored in the memory (video buffer memory 21 and audio buffer memory 22) for delaying the TV program. Therefore, the storage capacity of the memory can be reduced as compared with the case where all TV programs are stored, so that the manufacturing cost can be suppressed.

  Moreover, according to this TV receiver 1, a sound can be output from the speaker 15 and the user can be notified of the output of the rising scene. Therefore, if the user is listening to this sound, the user can prevent oversight of the excitement scene.

  In addition, according to the TV receiver 1, since the detection of the climax scene or quiet scene of the TV program being watched by the user is detected by increasing or decreasing the volume, the climax scene or quiet scene can be detected by simple processing. Detection can be performed, and the processing load of the control unit 10 can be suppressed.

  Next, a TV receiver according to a second embodiment of the present invention will be described with reference to FIG. The TV receiver according to the present embodiment has the same configuration as that of the TV receiver 1 according to the first embodiment except that it further includes a human sensor (detection means) 18. In the TV receiver 1 according to the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The human sensor 18 is a sensor that detects whether or not there is a person within the detection range. When the human sensor 18 detects the user within the detection range, the human sensor 18 outputs a signal indicating the detection to the control unit 10. The human sensor 18 detects a person around the TV receiver 1.

  Next, the TV program output operation in the normal operation mode of the TV receiver 1 will be described with reference to the flowchart shown in FIG.

  When the TV program is output in the normal operation mode (S11), the human sensor 18 detects the presence of the user (S12). If the user cannot be detected for a predetermined time or longer (YES in S13), the control unit 10 changes the operation mode from the normal operation mode to the notification addition mode (S14).

  As described above, according to the TV receiver 1, the operation mode is automatically notified when the human sensor 18 cannot detect the user for a predetermined time or more because the user is away from the TV receiver. Change to append mode. As a result, when the user is away from the TV receiver 1, even if a climax scene or a quiet scene is output, since the user is operating in the notification addition mode, a climax scene or a quiet scene is output. Prior to being notified, the user is informed in advance that the scene will be a lively scene or a quiet scene. Therefore, the user can prevent an overlooked scene or a quiet scene of the TV program being viewed. Note that the notification in this case is preferably such that a sound is output from the speaker 15 to notify the user in advance of the output of a rising scene or a quiet scene.

  The human sensor 18 may be a distance sensor that detects the distance from the TV receiver 1 to the user. In that case, if the human sensor 18 detects that the distance to the user changes frequently, it is determined that the TV program is not being watched, and the control unit 10 adds the notification of the operation mode from the normal operation mode. Change to mode. As a result, similarly to the above, the user can prevent an overlooked scene or a quiet scene of the TV program being watched from being overlooked.

  The human sensor 18 may detect a user's eyes. In this case, when the human sensor 18 detects that the user has not seen the display 14 of the TV receiver 1 for a predetermined time or longer, the control unit 10 changes the operation mode from the normal operation mode to the notification addition mode. May be. As a result, when the user is not looking at the display 14 of the TV receiver 1, the user is informed in advance that the scene will be a climax scene or a quiet scene. Can prevent missed scenes.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, in each of the above-described embodiments, the example in which the image display device described in the claims is a TV receiver has been described. However, the present invention is not limited thereto, and any image display device that can output video and audio may be used.

  In the above TV receiver, the video buffer memory and the audio buffer memory are used to delay the TV program. However, the video signal and the audio can be stored in the free space of the existing buffer memory without newly providing them. The output of the TV program may be delayed by temporarily storing the signal. In this case, it is not necessary to newly provide a buffer memory, so that the manufacturing cost can be further suppressed.

4 Remote control device (threshold setting means, notification setting means, notification timing setting means)
10 Control unit (output control means)
12 Tuner (Receiving means)
14 Display (Video display means)
15 Speaker (Audio output means)
18 Human sensor (detection means)
21 Video buffer memory (memory)
22 Voice buffer memory (memory)
23 Audio signal analysis unit (detection means)
10a Video / audio output unit (output control means)
17c Volume change threshold (threshold)

Claims (8)

Receiving means for receiving a broadcast signal;
Video display means for displaying video of the program based on the broadcast signal;
Audio output means for outputting the audio of the program based on the broadcast signal;
A memory for storing video and audio of a program based on the broadcast signal received by the receiving means;
Output control means for controlling the video and audio of the program read from the memory to be delayed and output to each of the video display means and the audio output means;
Detecting means for detecting a scene where the amount of change in volume exceeds a threshold among the scenes of the program based on the broadcast signal received by the receiving means;
When a scene where the amount of change in volume exceeds the threshold is detected by the detecting means, the video and audio corresponding to the detected scene are sent to the video display means and the audio output means by the output control means. An image display apparatus comprising: an informing unit that informs a user in advance that a volume change amount exceeds the threshold before output.   2. The image display device according to claim 1, wherein the notification unit causes the sound output unit to output a sound for notifying the user in advance that the volume change amount exceeds the threshold value. . When a scene in which the amount of change in volume exceeds the threshold due to an increase in volume is detected by the detection means,
The informing means outputs the program output from the audio output means before the video and audio of the program corresponding to the scene detected by the detection means are output to the video display means and the audio output means. The image display apparatus according to claim 1, wherein the volume of the sound is increased more than before.   The image display device according to claim 1, wherein the notification unit causes the video display unit to display a message for informing the user in advance that the volume change amount exceeds the threshold value. . And further comprising detection means for detecting a user existing near the image display device,
When the presence of the user is not detected for a predetermined time by the detection means,
The output control means controls the video and audio of the program read from the memory to be delayed and output to each of the video display means and the audio output means,
The detection means detects a scene where the amount of change in volume exceeds the threshold among the scenes of the program based on the broadcast signal received by the reception means,
The amount of change in volume exceeds the threshold before the notification means outputs video and audio corresponding to the detected scene to the video display means and audio output means by the output control means. The image display apparatus according to any one of claims 1 to 4, wherein a user is notified in advance that a scene is to be set.   The image display apparatus according to claim 1, further comprising a threshold setting unit configured to set the threshold value.   The image display device according to claim 1, further comprising notification setting means for setting whether or not to notify the user by the notification means.   The image display apparatus according to claim 1, further comprising notification timing setting means for setting a timing for performing notification to the user by the notification means.

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