JP2013038702A - Control device, display device, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device, a display device, and a control method capable of selecting a proper display channel from among plural broadcast channels.SOLUTION: The control device comprises: a position identification part 106 which detects the position of a viewer of a display device 100 for displaying an image of a display channel selected from among plural broadcast channels; and a control part 109 which on the basis of a stored content in a memory 108 for storing information indicating the relation between the position of the viewer and a broadcast channel, selects as the display channel a broad cast channel corresponding to the detected position of the viewer from among the broadcast channels.

Description

  The present invention relates to a control device, a display device, and a control method.

  In Patent Document 1, a user who is viewing a television receiver is recognized by face identification using a camera, etc., and whether or not the program can be viewed by the viewing user is restricted and viewing is restricted. A television receiver that learns the preferences of a user who is watching and automatically changes channels is disclosed.

  Further, in Patent Document 2, the operation of writing the currently selected channel data being received to the memory is repeated at regular time intervals, and the channel data corresponding to the current day of the week time is read from the memory when the power is turned on. An apparatus for reading and selecting a channel according to the channel data is disclosed.

JP 2000-175117 A JP-A-5-75487

  By the way, in a display device that displays an image of a display channel selected from a plurality of broadcast channels, for example, at the start of display, if an appropriate display channel can be selected and displayed from the plurality of broadcast channels, the viewer can Improved convenience.

Therefore, an object of the present invention is to provide a control device, a display device, and a control method capable of selecting an appropriate display channel from a plurality of broadcast channels.
Another object of the present invention is to provide a control device, a display device, and a control method that can appropriately adjust the volume of the sound of display target information such as the sound of a display channel.

The control device according to the present invention includes:
Detecting means for detecting a position of a viewer of a display device that displays an image of a display channel selected from a plurality of broadcast channels;
Based on the stored contents of the storage means for storing information indicating the relationship between the viewer position and the broadcast channel, the display unit displays the broadcast channel corresponding to the detected viewer position from the plurality of broadcast channels. Control means to select as a channel;
It is characterized by providing.

Further, the control device according to the present invention includes:
Detecting means for detecting the position or position change of the viewer of the display device that outputs the image and sound of the display target information;
Control means for adjusting the volume of a specific frequency range of the sound of the display target information output from the display device in accordance with the detected position or position change of the viewer;
It is characterized by providing.

Moreover, the display device according to the present invention includes:
A display device that displays an image of a display channel selected from a plurality of broadcast channels,
Detecting means for detecting the position of the viewer of the display device;
Based on the stored contents of the storage means for storing information indicating the relationship between the viewer position and the broadcast channel, the display unit displays the broadcast channel corresponding to the detected viewer position from the plurality of broadcast channels. Control means to select as a channel;
It is characterized by providing.

Moreover, the display device according to the present invention includes:
A display device that outputs an image and sound of display target information,
Detecting means for detecting the position or position change of the viewer of the display device;
Control means for adjusting the volume of a specific frequency range of the sound of the display target information output from the display device in accordance with the detected position or position change of the viewer;
It is characterized by providing.

Moreover, the control method according to the present invention includes:
Detecting a position of a viewer of a display device that displays an image of a selected display channel among a plurality of broadcast channels;
Based on the stored contents of the storage means for storing information indicating the relationship between the viewer position and the broadcast channel, the display unit displays the broadcast channel corresponding to the detected viewer position from the plurality of broadcast channels. Selecting as channel,
It is characterized by providing.

Moreover, the control method according to the present invention includes:
Detecting a position or position change of a viewer of a display device that outputs an image and sound of display target information;
Adjusting the volume of a specific frequency range of the sound of the display target information output from the display device in accordance with the detected position or position change of the viewer;
It is characterized by providing.

According to the present invention, an appropriate display channel can be selected from a plurality of broadcast channels.
In addition, according to the present invention, it is possible to appropriately adjust the sound volume of the display target information.

3 is a block diagram illustrating an example of a structure of a display device in Embodiment 1. FIG. 6 is a diagram for describing an example of an operation of a position specifying unit in Embodiment 1. FIG. 6 is a flowchart illustrating an example of an operation of a control unit regarding recording of relation information in the first embodiment. 3 is a diagram illustrating an example of storage contents of a memory in Embodiment 1. FIG. 5 is a flowchart illustrating an example of an operation of a control unit regarding selection of a display channel in the first embodiment. 10 is a block diagram illustrating an example of a configuration of a display device in Embodiment 2. FIG. FIG. 10 is a diagram for explaining an operation of an equalizer in the second embodiment. 10 is a flowchart illustrating an example of an operation of a control unit in the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram illustrating an example of a configuration of the display device 100 according to the first embodiment. The display device 100 is a device that displays display target information on a display screen, and is, for example, a television receiver. Here, the display target information is, for example, a television broadcast image, a program guide, or the like, and is a content to be displayed. Specifically, the display device 100 displays an image of a display channel selected from a plurality of broadcast channels on a display screen.

  In FIG. 1, a display device 100 includes an image receiving unit 101, an image processing unit 102, a display unit 103, a camera image acquisition unit 104, a human detection unit 105, a position specifying unit 106, a remote control light receiving unit 107, a memory 108, and a control unit. 109.

  The image receiving unit 101 includes a tuner, a demodulation circuit, a demultiplexer, and the like, receives a broadcast signal such as a television broadcast signal, extracts a bit stream signal, and extracts the bit stream signal as a video bit stream signal or an audio bit stream signal. , And output to metadata including program information. Here, the video bit stream signal is output to the image processing unit 102, the audio bit stream signal is output to an audio processing unit (not shown), and the metadata is output to the control unit 109. Specifically, the image receiving unit 101 receives a broadcast signal of the display channel under the control of the control unit 109, and outputs a video bit stream signal and an audio bit stream signal of the display channel.

  The image processing unit 102 decodes the input video bitstream signal and restores it to a broadcast image (specifically, an image signal or image data representing the broadcast image), and converts the broadcast image into an image suitable for display. Image processing is performed. This image processing includes removal of noise in the image and adjustment of the brightness, color, or size of the image. The image processing unit 102 outputs the obtained broadcast image to the display unit 103.

  The display unit 103 has a display screen, and displays an output image from the image processing unit 102 on the display screen. That is, the display unit 103 displays an image of the display channel on the display screen. The display unit 103 is a liquid crystal display device having a liquid crystal panel, for example. However, the display unit 103 may be another display device such as a plasma display device.

  The camera image acquisition unit 104 acquires an image (specifically, an image signal or image data) in which the front of the display screen of the display unit 103 is captured. When there is a viewer in front of the display screen, the camera image acquisition unit 104 acquires an image in which the viewer is captured. Specifically, the camera image acquisition unit 104 is configured by an imaging device that generates an image by imaging the front of the display screen. For example, the camera image acquisition unit 104 is a small video camera for incorporation into a device, is attached to the housing of the display device 100, and is arranged so as to capture a viewer in front of the display screen. However, the camera image acquisition unit 104 may acquire an image captured by an imaging device external to the display device 100. The image capturing is repeated, for example, 30 times per second. The camera image acquisition unit 104 outputs the acquired image (hereinafter referred to as “captured image”) to the human detection unit 105.

  The human detection unit 105 detects a person from the captured image acquired by the camera image acquisition unit 104, and detects the position and size of the person in the captured image as information representing the position of the person in the real space. . Specifically, the human detection unit 105 detects the center coordinates of the face of the person in the coordinate system of the captured image as the position of the person in the captured image, and the coordinate system of the captured image as the size of the person in the captured image. The width of the person's face (specifically, the width of the face in the horizontal direction) is detected. However, the human detection unit 105 determines the face position (specifically, the vertical length of the face), the shoulder width, the distance between both eyes, the position of each eye, and the apex of the head as the position and size of the person. Other information such as the coordinates may be detected. Further, the person detection unit 105 may detect the posture of the person such as an angle with respect to the vertical direction of the face.

When detecting a plurality of persons from the captured image, the person detecting unit 105 detects the position and size of the person in the captured image for each of the detected plurality of persons.
The person detecting unit 105 outputs a detection result indicating the position and size of each detected person to the position specifying unit 106.

  The position specifying unit 106 specifies the position of the viewer of the display device 100 (specifically, the position of the viewer with respect to the display device 100 or the display screen) based on the detection result from the person detecting unit 105. When the captured image acquired by the camera image acquisition unit 104 includes a plurality of persons based on the detection result of the person detection unit 105, the position specifying unit 106 determines a main viewer from the plurality of persons. Then, the position of the main viewer is specified as the position of the viewer. For example, the position specifying unit 106 sets a person having the largest size (for example, the largest face size) among a plurality of people as a main viewer. For example, the position specifying unit 106 evaluates the distance between the detected position of the person and the center point of the captured image, and sets the person closest to the center point as the main viewer. Further, for example, the position specifying unit 106 determines that the operator of the display device 100 is the main viewer. For example, the position specifying unit 106 detects the position of a remote controller (remote controller) for operating the display device 100, and the person who is the closest person (person who is determined as the operator) to the detected position of the remote controller is the main viewer. And When the captured image includes one person, the position specifying unit 106 specifies the position of the person as the position of the viewer, for example. The position specifying unit 106 outputs a specifying result indicating the position of the specified viewer to the control unit 109.

  Note that the position of the viewer is detected repeatedly at the same cycle as that of the captured image, for example. However, the position detection may be performed at other timing, and may be performed at a cycle longer than the imaging cycle, for example, once for N (N is an integer of 2 or more) captured images.

  The remote control light receiving unit 107 receives a control signal from a remote control (not shown) and outputs the control signal to the control unit 109. Specifically, the remote control receives an operation on the display device 100 from the viewer, transmits a control signal such as an optical signal indicating the operation, and the remote control light receiving unit 107 receives a control signal from the remote control. Examples of the operation include a display start operation (for example, power-on operation), a display end operation (for example, power-off operation), and a display channel selection operation.

  The memory 108 is a storage unit that stores information used for the control unit 109. Specifically, the memory 108 stores relationship information that is information indicating the relationship between the viewer's position, time, and broadcast channel. The relationship information is, for example, information in which the viewer's position, time, and broadcast channel are associated with each other. In this example, the memory 108 stores position information indicating the position of the viewer, time information indicating the time, and channel information indicating the broadcast channel in association with each other under the control of the control unit 109.

  The control unit 109 controls the operation of the display device 100. Specifically, when receiving a display start operation from the viewer, the control unit 109 performs a process of starting display of an image on the display screen. For example, when the control unit 109 receives a control signal indicating a power-on operation from the remote control light receiving unit 107, the control unit 109 starts supplying power to each unit of the display device 100 and starts displaying an image on the display screen. Also, when receiving a display channel selection operation from the viewer, the control unit 109 controls the image receiving unit 101 to display an image of the selected display channel on the display screen. Further, when receiving a display end operation from the viewer, the control unit 109 performs a process of ending the display of the image on the display screen. For example, when the control unit 109 receives a control signal indicating a power-off operation from the remote control light receiving unit 107, the control unit 109 stops power supply to each unit of the display device 100 except for a part that monitors the power on operation such as the remote control light receiving unit 107. To end the display of the image on the display screen.

  In the present embodiment, when the image of the broadcast channel is displayed on the display device 100, the control unit 109 displays the position of the viewer detected during the display of the image of the broadcast channel and the image of the broadcast channel. Information associating the displayed time with the broadcast channel is recorded in the memory 108 as the relation information. Specifically, the control unit 109 determines whether any of the broadcast channels has been viewed. If the control unit 109 determines that the broadcast channel has been viewed, the control unit 109 can detect the viewing detected by the position specifying unit 106 during display of the broadcast channel. The position information indicating the position of the broadcaster (that is, the position of the viewer of the broadcast channel), the time information indicating the display time of the broadcast channel, and the channel information indicating the broadcast channel are recorded in association with each other. For example, when the same broadcast channel is continuously displayed for a predetermined time (for example, 30 minutes), the control unit 109 determines that the broadcast channel has been viewed and executes recording in the memory 108.

  Further, the control unit 109, for example, at the start of displaying an image on the display screen, based on the storage contents of the memory 108, the viewer position and the current time detected by the position specifying unit 106 from among a plurality of broadcast channels. The broadcast channel corresponding to is selected as the display channel. More specifically, when the control unit 109 receives a power-on operation from the viewer, the control unit 109 presents the current viewing indicated by the identification result from the position identifying unit 106 based on the relationship information stored in the memory 108. The broadcast channel associated with the user's position and the current time is selected as the display channel. When the display channel is selected, the control unit 109 controls the image receiving unit 101 to display an image of the selected display channel on the display screen.

  In the example of FIG. 1, the detection unit is realized by the image acquisition unit 101, the human detection unit 102, and the position specifying unit 103, the control unit is realized by the control unit 109, and the control device is This is realized by the image acquisition unit 101, the person detection unit 102, the position specifying unit 103, and the control unit 109.

  FIG. 2 is a diagram for explaining an example of the operation of the position specifying unit 106 in the first embodiment. FIG. 2 shows a captured image 200 acquired by the camera image acquisition unit 104, and the captured image 200 is divided into 16 regions. The position specifying unit 106 outputs position information indicating an area corresponding to the viewer's coordinates in the captured image to the control unit 109 as a specifying result indicating the position of the viewer. For example, when the center coordinates of the viewer's face are included in the region “6”, the position specifying unit 106 outputs position information “6” indicating the region to the control unit 109. Note that the number of divisions of the captured image 200 is not limited to 16.

  FIG. 3 is a flowchart illustrating an example of the operation of the control unit 109 regarding the recording of the relationship information in the first embodiment. Hereinafter, with reference to FIG. 3, the operation of the control unit 109 relating to the recording of the relationship information will be described. The process shown in FIG. 3 is repeatedly performed during the operation of the display device 100.

  The control unit 109 temporarily holds the current broadcast channel (that is, the currently displayed broadcast channel) of the broadcast signal being received by the image reception unit 101, the current time, and the current viewer position. (S11). Specifically, the control unit 109 holds channel information indicating the current broadcast channel, time information indicating the current time, and position information indicating the current viewer position from the position specifying unit 106. For example, the position information “6” is held when the area “6” in FIG. 2 is detected as the position of the viewer, and the position information “d” is held when the area “d” is detected. .

  Next, the control unit 109 determines whether or not the viewer has changed the broadcast channel by operating the remote controller (S12). Specifically, based on the control signal from remote control light receiving unit 107, control unit 109 determines whether or not an operation for selecting a broadcast channel different from the currently displayed broadcast channel has been received.

  If it is determined that the channel has been changed (S12: YES), the control unit 109 returns to step S11 and temporarily stores the changed broadcast channel, the current time, and the current viewer position. To do.

  On the other hand, when it is determined that the channel has not been changed (S12: NO), the control unit 109 determines whether or not a predetermined time (in this case, 30 minutes) has elapsed since the start of display of the current broadcast channel ( S13). This predetermined time is for eliminating a so-called channel hopping operation such as searching for a channel to be viewed by the viewer, and is not limited to 30 minutes, but may be determined as appropriate.

  When it is determined that the predetermined time has not elapsed (S13: NO), the control unit 109 returns the process to step S12.

  On the other hand, when it is determined that the predetermined time has elapsed (S13: YES), the control unit 109 determines that the viewer is viewing the broadcast channel being displayed, and the time (current time) at that time is the predetermined time. Round the unit (S14). Here, the control unit 109 rounds the current time in units of 30 minutes, for example, 7:30 if 7:35. This is to simplify the process, and does not have to be in units of 30 minutes, and may be in units of 10 minutes, for example.

  Next, the control unit 109 displays time information indicating the time obtained in step S14, channel information indicating the temporarily held broadcast channel, and position information indicating the position of the viewer temporarily held. Are written in the memory 108 in association with each other (S15). Specifically, as shown in FIG. 4, the control unit 109 records a record (data) including time information, position information, and channel information in the memory 108. In the example of FIG. 4, the storage content (relation information) 300 of the memory 108 is No. 1-No. 4 records are included. Here, in step S15 in FIG. 3, if a record including the same time information and position information as the writing target is already recorded in the memory 108, the control unit 109 sets the channel information of the record to the current time. Update to channel information. Therefore, in the memory 108, the combination of the time and the position of the viewer and the broadcast channel are associated one to one.

  FIG. 5 is a flowchart illustrating an example of the operation of the control unit 109 regarding display channel selection according to the first embodiment. Hereinafter, the operation of the control unit 109 relating to selection of the display channel will be described with reference to FIG. The process shown in FIG. 5 is executed when display of the display device 100 is started.

  When starting the operation of the display device 100, such as when starting viewing on the display device 100, the viewer performs a power-on operation on the remote control. In response to this, the remote control transmits a control signal indicating a power-on operation, and the remote control light receiving unit 107 receives the control signal from the remote control and transmits it to the control unit 109. Upon receiving the control signal, the control unit 109 acquires the current time, rounds it in a predetermined time unit (here, 30 minutes), and temporarily holds the rounded current time (S21). For example, when the current time is 19:28, the control unit 109 rounds the current time to 19:30.

  Next, the control unit 109 controls the camera image acquisition unit 104, the person detection unit 105, and the position specifying unit 106 to acquire the current viewer position (S22). For example, when the position of the viewer detected by the position specifying unit 106 is the region “6” in FIG. 3, the control unit 109 acquires the position information “6” from the position specifying unit 106.

  Next, the control unit 109 searches the relationship information stored in the memory 108 for the broadcast channel associated with the time obtained in step S21 and the viewer position obtained in step S22 (S23). ). Specifically, the control unit 109 searches the memory 108 for a record including the time information obtained in step S21 and the position information obtained in step S22, and when the record is found, The channel information included in the record is acquired as a search result. For example, when the current time rounded is 19:30 and the current position information is “6”, the control unit 109 reads the time information “19” from the stored content 300 shown in FIG. No. corresponding to “hour 30 minutes”. 2 and no. No. 3 corresponding to the position information “6” is extracted from the two records. 2 record is extracted, and channel information “4” included in the record is acquired as a search result.

  Next, the control unit 109 determines whether or not a broadcast channel has been searched (S24). If a broadcast channel has been searched (S24: YES), the process proceeds to step S25 and is not searched. (S24: NO), the process proceeds to step S26.

  In step S25, the control unit 109 performs control to select the broadcast channel searched in step S23 as a display channel and display an image of the broadcast channel on the display screen. For example, when channel information “4” is acquired as a search result in step S23, the control unit 109 controls the image receiving unit 101 to tune to the broadcast channel 4 indicated by the channel information, and this broadcast channel. 4 broadcast signals are received and displayed.

  In step S26, the control unit 109 performs control to select a predetermined broadcast channel, such as the last displayed broadcast channel (last channel), as a display channel and display an image of the broadcast channel on the display screen.

According to the first embodiment described above, the following effects (1) to (6) can be obtained.
(1) In the present embodiment, the control device detects the position of the viewer of the display device, and based on the storage content of the storage unit that stores information indicating the relationship between the viewer position and the broadcast channel, A broadcast channel corresponding to the detected viewer position is selected as a display channel from the broadcast channels. Therefore, according to the present embodiment, an appropriate display channel can be selected from a plurality of broadcast channels according to the position of the viewer. For example, by executing the selection of the display channel at the start of display, the channel at the start of display can be appropriately selected, and the viewer can automatically and quickly access a desired channel.

  The above configuration utilizes, for example, that the position where the viewer sits is generally fixed in a general home. For example, when there are two viewers V1 and V2 in the home, the positions of the viewers V1 and V2 are generally determined, and the positions are rarely changed randomly. Therefore, by selecting the display channel based on the viewer's position as in the present embodiment, the viewer's target channel can be reached immediately.

  (2) When the image of the broadcast channel is displayed on the display device, the control device stores information that associates the position of the viewer detected during display of the image of the broadcast channel with the broadcast channel. To record. According to this aspect, it is possible to select a display channel based on the viewer's actual viewing behavior. In addition, a special operation such as an operation of setting information indicating the relationship between the viewer's position and the broadcast channel in the storage unit is unnecessary, which is highly convenient for the viewer.

  (3) The control device, based on the storage content of the storage unit that stores information indicating the relationship between the viewer's position, time and broadcast channel, detects the viewer's position and the current position detected from a plurality of broadcast channels. A broadcast channel corresponding to the time is selected as a display channel. According to this aspect, the display channel can be selected more appropriately according to the current viewer position and time.

  (4) When the image of the broadcast channel is displayed on the display device, the control device detects the position of the viewer detected during the display of the image of the broadcast channel, and the time when the image of the broadcast channel is displayed. , Information associated with the broadcast channel is recorded in the storage unit. According to this aspect, it is possible to select a display channel based on the viewer's actual viewing behavior. In addition, a special operation such as an operation of setting information indicating the relationship between the viewer's position, time, and broadcast channel in the storage unit is unnecessary, which is highly convenient for the viewer.

  (5) The control device acquires a captured image in which the front of the display screen of the display device is captured, and detects the viewer's position from the captured image. According to this aspect, the position of the viewer can be detected with a simple configuration.

  (6) When the acquired captured image includes a plurality of persons, the control device determines a main viewer from the plurality of persons and detects the position of the main viewer as the position of the viewer. . According to this aspect, even when the captured image includes a plurality of persons, it is possible to appropriately control.

  In the above description, the video camera attached to the housing of the display device is illustrated as the camera image acquisition unit 104. However, the camera image acquisition unit 104 does not need to be attached to the housing, and It may be a video camera used for surveillance purposes or a video phone as long as it can be photographed appropriately.

  Further, in the above description, the case where the viewer's position is detected from the captured image is exemplified, but the viewer's position may be another method such as a method using a pyroelectric sensor or a method using ultrasonic radar. Or a plurality of means such as a pyroelectric sensor and a camera may be used simultaneously.

  In the above description, when the captured image includes a plurality of persons, the position specifying unit 106 specifies the main viewer from the plurality of persons and outputs the specifying result to the control unit 109. However, instead of specifying the main viewer, all the position information of a plurality of persons may be output to the control unit 109, and the control unit 109 may select a display channel according to the position information of the plurality of persons. . For example, the position specifying unit 106 may weight the position information of a plurality of persons, and the control unit 109 may search for a broadcast channel corresponding to the position information in an order corresponding to the weight. For example, the control unit 109 may search for the broadcast channel corresponding to the position information in order from the position information with the largest weight, and may select the broadcast channel as the display channel when the broadcast channel is searched. The weighting may be performed according to a predetermined rule such as increasing the weight as it is closer to the center of the captured image, or may be performed according to a weight setting for each position preset by a viewer or the like. .

  In the above description, the configuration in which the viewer's two-dimensional position shown in FIG. 2 is detected and the display channel is selected in accordance with the viewer's two-dimensional position is exemplified. The three-dimensional position of the person may be detected, and the display channel may be selected according to the detected three-dimensional position. For example, the position specifying unit 106 represents the information indicating the position of the viewer in the captured image (for example, information indicating the area in FIG. 2) and the distance from the display screen to the viewer as the specifying result indicating the position of the viewer. Position information including distance information may be output to the control unit 109. In this case, the position specifying unit 106 can use information indicating the size of the viewer in the captured image as the distance information.

  In the above description, the case where the size of the viewer in the captured image is detected is exemplified, but distance information indicating the distance from the display screen to the viewer may be acquired by other methods. For example, the distance information may be obtained by acquiring a stereo image by a plurality of imaging devices, or the distance information may be obtained by using a special imaging device having a function of measuring the distance.

  In the above description, the case where the combination of the time and the viewer's position and the broadcast channel are associated one-to-one in the relational information in the memory 108 is illustrated, but the combination of the time and the viewer's position is one-to-one. On the other hand, a configuration in which a plurality of broadcast channels can be associated may be employed. For example, in step S15 in FIG. 3, the control unit 109 sets the time information and position information to be written regardless of whether or not a record including the same time information and position information as the write target has already been recorded in the memory 108. And a new record including the channel information may be recorded in the memory 108. That is, the control unit 109 may record the viewing history including the viewing time and the viewing channel in the memory 108 in association with the detected viewer position. In this case, when a plurality of records corresponding to the current time and the current viewer position are searched when the display channel is selected, the control unit 109 searches, for example, the channel information included in the latest record. Or the most channel information of channel information included in the plurality of records may be acquired as a search result. That is, the control unit 109 may select a recently watched broadcast channel as a display channel or a broadcast channel with the highest viewing frequency as a display channel under the same time and viewer position conditions as the current time. May be.

  In the above description, the configuration in which the control unit 109 records the related information based on the actual viewing is illustrated. However, the related information may be created by another method, and the memory may be stored by a setting operation of the viewer or the like. 108 may be set.

  In the above description, the configuration in which the display channel is selected at the start of display is illustrated, but the selection of the display channel may be performed at another timing. For example, it may be executed when a person is detected from a state where no person is detected by the person detection unit 105 during display of the display device 100, that is, when a person comes before the display screen. . For example, it may be executed at a preset time.

  In the above description, the configuration in which the display channel is selected according to the position and time of the viewer is illustrated. However, the control unit 109 may select the display channel according to the position of the viewer regardless of the time. Of course, time information may be omitted from the related information in the memory 108. In this case, for example, the control unit 109 may be configured to select the broadcast channel that was last displayed at the current viewer position as the display channel, or the viewing frequency is the highest at the current viewer position. The broadcast channel having the highest or longest viewing time may be selected as the display channel.

Embodiment 2. FIG.
FIG. 6 is a block diagram illustrating an example of a configuration of the display device 400 according to the second embodiment. Since this display device 400 is the same as that of the first embodiment in many parts, the same reference numerals are used for the same parts as in the first embodiment, and the description is omitted or simplified.

  In the present embodiment, display device 400 further includes a position change detection unit 110, an audio processing unit 111, an equalizer 112, and a speaker 113 in addition to the configuration of display device 100 of the first embodiment. In addition to the functions described in the first embodiment, the control unit 114 further has the following functions.

  In this embodiment, the image receiving unit 101 outputs an audio bit stream signal of a display channel to the audio processing unit 111.

  The audio processing unit 111 decodes the input audio bitstream signal and restores it to the broadcast audio (specifically, audio signal or audio data) attached to the broadcast image, and the audio suitable for reproduction with respect to the broadcast audio. Audio processing to make it. Examples of the voice processing include removal of noise in the voice, adjustment of the tone of the voice, or the volume level. The audio processing unit 111 outputs the obtained broadcast audio to the equalizer 112.

  The equalizer 112 adjusts the frequency characteristics of broadcast audio, and enhances or attenuates audio signals in a specific frequency band of the broadcast audio. Here, the equalizer 112 enhances or attenuates an audio signal in a frequency band of a human voice. Specifically, the equalizer 112 enhances or attenuates the audio signal in the band of 0.3 KHz to 3.4 KHz, which is the band of the telephone line, under the control of the control unit 114. The output of the equalizer 112 is output to a speaker 113 that is an audio output unit, and is reproduced and output as broadcast audio by the speaker 113. In this example, the band of the telephone line is used as the frequency band of the human voice, but the present invention is not limited to this. Further, the frequency band of the human voice may be divided into a plurality of bands, and the sound signals in each band may be adjusted with a plurality of equalizers.

  The position change detection unit 110 detects a change in position of the viewer based on the identification result from the position identification unit 106. Specifically, the position change detection unit 110 detects a change in the position and size of the viewer in the captured image as the position change of the viewer. More specifically, the position change detection unit 110 sequentially compares the current captured image with the previous captured image (for example, 1/30 seconds before), and compares the viewer position difference in the captured image and the viewing in the captured image. The difference of the person's size is detected. In the detection of the position change, the position change detection unit 110 uses the average value of the position and the size a plurality of times from the viewpoint of obtaining a stable result by suppressing the influence of the viewer's minute movement and noise. You may ask for it. The position change detection unit 110 outputs a detection result indicating the detected position change of the viewer to the control unit 114. The position change detection unit 110 may output the determination result of the position specifying unit 106 to the control unit 114 together with the detection result.

  The control unit 114 performs display target information sound output from the display device 400 in accordance with the viewer position detected by the position specifying unit 106 or the viewer position change detected by the position change detection unit 110. Here, it has a function of adjusting the volume of a specific frequency range of the sound of the display channel). In this example, the specific frequency range is a range corresponding to a human voice frequency band, and the control unit 114 controls the equalizer 112 to adjust the volume of the telephone line band of the voice of the display channel. In addition, when the viewer moves in a direction away from the display device 400 (or the display screen or the speaker 113), the control unit 114 increases the volume of the specific frequency range. When the viewer moves in a direction approaching the display device 400, the control unit 114 may decrease the volume of the specific frequency range.

  FIG. 7 is a diagram for explaining the operation of the equalizer 112 in the second embodiment. FIG. 8 is a flowchart showing an example of the operation of the control unit 114 in the second embodiment. Hereinafter, the operation of the control unit 114 will be described with reference to FIGS. 7 and 8. In the following description, it is assumed that a broadcast image is displayed on the display screen of the display unit 103.

  The control unit 114 acquires the viewer position and the position change detection result from the position change detection unit 110 (S31). Specifically, the control unit 114 acquires information indicating the position and size of the viewer in the captured image, and information indicating the difference in position and size of the viewer in the captured image.

  Next, the control unit 114 determines whether or not the viewer has moved in the direction of approaching or moving away from the display screen based on the detection result of the viewer's position change (S32).

  Until it is determined that the viewer has moved in a direction approaching or moving away from the display screen, the control unit 114 repeatedly acquires the detection result of the position change detection unit 110 (S32: NO).

  When it is determined that the viewer has moved in a direction approaching or moving away from the display screen (S32: YES), the control unit 114 advances the process to step S33.

  In step S33, the control unit 114 determines whether or not the viewer has moved in the approaching direction. If it is determined that the viewer has moved in the approaching direction (S33: YES), the process proceeds to step S34. On the other hand, when it is judged that it moved to the direction away (S33: NO), the control part 114 advances a process to step S35.

  In step S35, the control unit 114 operates the equalizer 112 to increase the gain of the human voice frequency band. Specifically, as shown in FIG. 7, the control unit 114 increases the gain in the band from 0.3 KHz to 3.4 KHz which is the band of the telephone line. Thereby, the audio | voice part of the frequency range of a human voice is largely reproduced among the broadcast audio | voices output from the speaker 113. FIG. After step S35, the process returns to step S31, and the above process is repeated. In FIG. 7, the broken line indicates the characteristic before gain adjustment, and the solid line indicates the characteristic after gain adjustment.

  In step S34, the control unit 114 determines whether or not the current viewer position is ahead of the initial position (for example, the position when the power is turned on), and when it is determined that the position is ahead of the initial position. (S34: YES), the process returns to step S31 without changing the gain. On the other hand, if it is determined that the position is not ahead of the first position (S34: NO), the process proceeds to step S36.

  In step S36, the control unit 114 operates the equalizer 112 to lower the gain of the human voice frequency band. Thereby, the audio | voice part of the frequency range of a human voice is reproduced small among the broadcast audio | voices output from the speaker 113. FIG. After step S36, the process returns to step S31, and the above process is repeated.

  According to the second embodiment described above, the following effects (7) to (9) can be obtained in addition to the effects of the first embodiment.

  (7) In the present embodiment, the control device determines the specific frequency of the audio of the display target information (for example, audio information of the display channel) output from the display device in accordance with the detected position or position change of the viewer. Adjust the volume of the range. For this reason, according to the present embodiment, the volume of the sound of the display target information can be adjusted appropriately according to the position or position change of the viewer, and for example, a good sound can be automatically obtained. . Also, because the volume of a specific frequency range is adjusted, the overall volume will not be too loud compared to adjusting the overall volume of the audio, and the viewing situation will be improved while suppressing the impact on the surrounding environment. can do.

  (8) The specific frequency range is a range corresponding to a human voice frequency band. According to this aspect, it is possible to appropriately adjust the volume of the human voice frequency band in the voice of the display target information in accordance with the position of the viewer or the position change.

  (9) When the viewer moves in a direction away from the display device, the control device increases the volume of the specific frequency range. According to this aspect, since the volume increases when the position of the viewer becomes far away, it can be avoided or reduced that the sound becomes difficult to hear when the position of the viewer becomes far away. For example, when the position of the viewer is far away, the volume of the human voice frequency band is increased, so that it is possible to avoid or reduce the difficulty of listening to the content spoken by the person.

  In the above description, the configuration in which the volume is mainly adjusted in accordance with the change in the position of the viewer is exemplified, but the control unit 114 may adjust the volume in accordance with the detected position of the viewer. For example, the control unit 114 determines an adjustment value from the detected viewer position based on information in which the viewer position and the adjustment value are associated with each other, and adjusts the volume of a specific frequency range based on the adjustment value. May be. The adjustment value is, for example, a control value for changing the gain of the equalizer 112, and is set such that the gain increases as the position of the viewer is farther from the display device.

  In the above description, the range corresponding to the human voice frequency band is exemplified as the specific frequency range. However, the specific frequency range may be other ranges, and may be set by a viewer, for example.

  In the first and second embodiments described above, the function of the control device may be realized only by hardware resources such as an electronic circuit, or may be realized by cooperation of hardware resources and software. When realized by cooperation of hardware resources and software, the function of the control device is realized by, for example, a control program being executed by a computer. More specifically, the function of the control device is executed by a central processing unit (CPU) by reading a control program recorded in a recording medium such as a ROM (Read Only Memory) into the main storage device. It is realized by doing. The control program may be provided by being recorded on a computer-readable recording medium such as an optical disk, or may be provided via a communication line such as the Internet.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can implement with a various aspect.

  100, 400 display device, 101 image receiving unit, 102 image processing unit, 103 display unit, 104 camera image acquisition unit, 105 human detection unit, 106 position specifying unit, 107 remote control light receiving unit, 108 memory, 109, 114 control unit, 110 position change detection unit, 111 sound processing unit, 112 equalizer, 113 speaker.

Claims (14)

Detecting means for detecting a position of a viewer of a display device that displays an image of a display channel selected from a plurality of broadcast channels;
Based on the stored contents of the storage means for storing information indicating the relationship between the viewer position and the broadcast channel, the display unit displays the broadcast channel corresponding to the detected viewer position from the plurality of broadcast channels. Control means to select as a channel;
A control device comprising:   When the image of the broadcast channel is displayed on the display device, the control means stores information associating the position of the viewer detected during the display of the image of the broadcast channel with the broadcast channel. The control device according to claim 1, wherein the control device has a recording function. The storage means stores information indicating a relationship between a viewer's position, time, and broadcast channel,
The control means selects, as the display channel, a broadcast channel corresponding to the detected viewer position and the current time from the plurality of broadcast channels based on the stored contents of the storage means.
The control device according to claim 1.   The control means, when an image of a broadcast channel is displayed on the display device, the position of the viewer detected during the display of the image of the broadcast channel, the time when the image of the broadcast channel is displayed, The control apparatus according to claim 3, further comprising a function of recording information associated with the broadcast channel in the storage unit.   The said detection means acquires the captured image by which the front of the display screen of the said display apparatus was imaged, The position of the said viewer is detected from the said captured image, The any one of Claim 1 to 4 characterized by the above-mentioned. The control device described in 1.   When the acquired captured image includes a plurality of persons, the detection unit determines a main viewer from the plurality of persons, and detects the position of the main viewer as the position of the viewer. The control device according to claim 5.   The control means has a function of adjusting the volume of a specific frequency range of the sound of the display channel output from the display device in accordance with the position of the viewer detected by the detection means or a change in position. The control device according to claim 1, wherein the control device is characterized in that: Detecting means for detecting the position or position change of the viewer of the display device that outputs the image and sound of the display target information;
Control means for adjusting the volume of a specific frequency range of the sound of the display target information output from the display device in accordance with the detected position or position change of the viewer;
A control device comprising:   The control device according to claim 7 or 8, wherein the specific frequency range is a range corresponding to a frequency band of a human voice.   10. The control device according to claim 7, wherein when the viewer moves in a direction away from the display device, the control unit increases the volume of the specific frequency range. . A display device that displays an image of a display channel selected from a plurality of broadcast channels,
Detecting means for detecting the position of the viewer of the display device;
Based on the stored contents of the storage means for storing information indicating the relationship between the viewer position and the broadcast channel, the display unit displays the broadcast channel corresponding to the detected viewer position from the plurality of broadcast channels. Control means to select as a channel;
A display device comprising: A display device that outputs an image and sound of display target information,
Detecting means for detecting the position or position change of the viewer of the display device;
Control means for adjusting the volume of a specific frequency range of the sound of the display target information output from the display device in accordance with the detected position or position change of the viewer;
A display device comprising: Detecting a position of a viewer of a display device that displays an image of a selected display channel among a plurality of broadcast channels;
Based on the stored contents of the storage means for storing information indicating the relationship between the viewer position and the broadcast channel, the display unit displays the broadcast channel corresponding to the detected viewer position from the plurality of broadcast channels. Selecting as channel,
A control method comprising: Detecting a position or position change of a viewer of a display device that outputs an image and sound of display target information;
Adjusting the volume of a specific frequency range of the sound of the display target information output from the display device in accordance with the detected position or position change of the viewer;
A control method comprising:

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