JP2006245745A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcast receiver capable of preventing a viewer from feeling sense of incongruity when adjusting characteristics of video and voice output on the basis of a genre of a program. <P>SOLUTION: The digital broadcast receiver has a setting storage means 12 for storing setting information in which video characteristics and voice characteristics are set for each genre information; a video signal generation means 6 for adjusting the characteristics of video signals; a voice signal generation means 7 for adjusting the characteristics of voice signals; and a control means 11 which monitors the genre information included in the extracted program content data, reads out the setting information in the changed genre from the setting storage means 12 when the change of the genre information is detected, and controls the video signal generation means 6 and the voice signal generation means 7 so as to change the characteristics step by step by a prescribed change amount for each prescribed period of time on the basis of the read-out setting information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a digital broadcast receiving apparatus that receives terrestrial digital broadcasts, satellite (BS, CS) digital broadcasts, and the like, and more particularly to a video output and audio output control method.

  In the digital broadcasting system, in addition to video data and audio data, program content data including program genre information is also transmitted. There is a proposal of a digital broadcast receiving apparatus that can set the output video characteristics and output audio characteristics of a received broadcast according to the user's preference by using the genre information of the program (see, for example, Patent Document 1). In this digital broadcast receiving apparatus, an adjustment amount is set in advance for each genre, and the adjustment amount is stored. When the viewing channel is changed, the genre of the program broadcast on the changed channel is acquired, and the output video characteristic and the output audio characteristic are automatically adjusted according to the adjustment amount for the acquired genre.

JP-A-10-322622 (paragraphs 0019-0021, FIG. 3)

  However, in the above-described conventional digital broadcast receiving apparatus, when the viewer performs an operation to switch channels continuously at short time intervals, output video characteristics (for example, video brightness) The output sound characteristics (for example, volume) will change frequently. In this case, the viewer feels a sense of incongruity (unnatural changes in video and audio) due to the frequently changing output video characteristics and output audio characteristics. In particular, when the adjustment amount between genres is extremely large, the viewer feels a noticeable sense of discomfort (unnatural changes in video and audio). Also, not only when switching channels, but also when a broadcast program is switched during viewing, if the amount of adjustment between genres is extremely large, the viewer may experience a noticeable sense of discomfort (unnatural changes in video and audio). )

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and its purpose is to provide a viewer with automatic adjustment of video characteristics and audio characteristics based on the program genre. It is an object of the present invention to provide a digital broadcast receiving apparatus that does not give a sense of incongruity.

  The digital broadcast receiving apparatus of the present invention separates the video data, the audio data, and the program content data from the data obtained by multiplexing the program content data including broadcast program video data, audio data, and genre information. Output demultiplexing means, setting storage means for storing setting information in which at least one of video characteristics and audio characteristics is set for each genre information, and adjusting at least one characteristic of the video data and the audio data Then, signal generation means for outputting a video signal and an audio signal based on the video data and the audio data, and genre information included in the extracted program content data are monitored, and a change in the genre information is detected. Sometimes, the setting information in the changed genre is read from the setting storage means, and the read setting information is Zui and is characterized in that a control means for controlling said signal generating means so as to change stepwise the characteristics by a predetermined change amount every predetermined time.

  According to the present invention, when video characteristics and / or audio characteristics are prepared for each program genre, from the current video characteristic setting and / or audio characteristic setting, the next video characteristic setting and / or audio characteristic setting is performed. Control is performed such that the characteristic is changed step by step by a predetermined change amount every predetermined time, so that an uncomfortable feeling felt by the viewer can be reduced.

Embodiment 1 FIG.
FIG. 1 is a block diagram schematically showing a configuration of a digital broadcast receiving apparatus according to Embodiment 1 of the present invention. As shown in FIG. 1, a digital broadcast receiving apparatus according to Embodiment 1 includes an antenna 1 that receives broadcast radio waves, a tuner 2 that selects and demodulates broadcast radio waves, video data, audio data, and a program. The demultiplexing means 3 for separating video data, audio data and program information data from the multiplexed data of the information data, the video decoding means 4 for decoding the video data separated by the demultiplexing means 3, and the demultiplexing means 3 Audio decoding means 5 for decoding the separated audio data, video signal generating means 6 for generating a video signal by adding a necessary synchronization signal or the like from the decoded video data decoded by the video decoding means 4, and audio decoding Audio signal generating means 7 for converting the decoded audio data decoded by the means 5 into an analog signal, video output means 8 such as a display monitor, and speakers, for example. And an audio output unit 9. In addition, the digital broadcast receiving apparatus according to Embodiment 1 outputs an operation means 10 such as a remote controller and a control means 11 for controlling the apparatus for a viewer to operate the apparatus. It has setting storage means 12 such as a non-volatile memory for storing the parameter setting values of the characteristics of the video signal and the characteristics of the audio signal to be output.

  Next, the operation of the digital broadcast receiving apparatus according to Embodiment 1 will be described. Broadcast radio waves received by the antenna 1 select and extract a target carrier wave by the tuner 2 and demodulate it to generate a digital multiple signal. In digital broadcasting, a multiple signal format conforming to TS (Transport Stream) defined by MPEG2-Systems (ISO / IEC13818-1) is used. When the viewer uses the operation means 10 to select a program, the control means 11 receives program selection information from the operation means 10. The control means 11 controls the tuner 2 to extract a digital multiplex signal of the selected program. The digital multiple signal output from the tuner 2 is separated into video data, audio data, and program information data by the demultiplexing means 3. Since the separated video data and audio data are in an encoded state, they are decoded by the video decoding means 4 and the audio decoding means 5. The decoded decoded video data is output at a predetermined timing by the video signal generation means 6 and is added with a synchronization signal. Further, the video signal generation unit 6 performs image quality adjustment such as luminance, contrast, and saturation according to instructions from the control unit 11. Depending on the input specifications of the display means 8, the video signal generation means 6 performs D / A conversion and outputs it as an analog signal. The video signal output from the video signal generation means 6 is input to the video display means 8 so that the viewer can watch the video of the program. On the other hand, the decoded audio data output from the audio decoding means 5 is D / A converted by the audio signal generation means 7 and further output after adjusting the volume and sound quality according to instructions from the control means 11. The output sound signal can be heard by the viewer as sound by the sound output means 9.

  Next, a method for automatically adjusting video characteristics and audio characteristics based on program information data will be described. The program information data separated by the demultiplexing means 3 is stored in a memory (not shown), which is read by the control means 11 to obtain program genre information included in the program information data. In the current digital broadcasting, “news / report”, “sports”, “information / wide show”, “drama”, “variety”, “movie”, “animation / special effects”, “documentary / education”, “ “Theatre / performance”, “hobby / education”, “welfare” and the like are defined as genres. However, the genre is not limited to the above classification.

  The setting storage means 12 stores setting information about volume, sound quality, and image quality for each genre as a table. An example of the table is shown in FIG. In FIG. 2, “movie”, “news”, and “variety” are listed as typical genres.

  The table shown in FIG. 2 stores setting information that determines how to adjust the volume, sound quality (high sound), sound quality (low sound), brightness, contrast, and saturation for each genre. . For example, with respect to “movie”, the volume is not changed and adjustment is performed to emphasize bass to increase the sense of reality, and the brightness is reduced by a predetermined amount (−g) from the standard setting in consideration of long-time viewing. This means that the contrast is not changed, and the saturation is adjusted to be increased by a predetermined amount (+ j) from the standard setting. As for “news”, the volume is increased by a predetermined amount (+ a) from the standard setting so that the human voice can be easily heard, and the sound quality is also adjusted to emphasize the band of the human voice. For the video when viewing “News”, the brightness and saturation are not changed from the standard settings, and the contrast is adjusted to be higher (+ i) than the standard settings so that characters and the like are easy to read.

  In FIG. 2, the values of a, b, c, d, e, f, g, h, i, j, and k are the sound volume, sound quality, brightness, contrast, and saturation, and the display means 8 and the sound output means 9. Is a step value quantized in advance within a range that can be displayed or output. The meanings of “+” and “−” are “+” in the direction in which the effect increases from the standard setting REF, and “−” in the direction in which the effect decreases. For example, “+ h” in the luminance of the video means that the luminance is increased by h steps from the standard setting REF. FIG. 3 is a diagram showing the concept of a step value pre-quantized for volume, FIG. 4 is a diagram showing the concept of a step value pre-quantized for luminance, and FIG. 5 is pre-quantized for contrast. It is a figure which shows the concept of a step value. The adjustment corresponding to “0” in these figures means the standard setting, and the corresponding effect is increased or decreased by adjusting in the plus or minus direction.

  FIG. 6 is a flowchart showing an automatic setting method of video characteristics and audio characteristics in the digital broadcast receiving apparatus according to Embodiment 1 of the present invention.

  When the viewer changes the channel and the program changes, or when the program content changes due to switching of the viewing program, the control means 11 determines whether the program content has changed (step S1). Next, the control means 11 acquires the program information data after the program change, and extracts the program genre information therein (step S2). Next, the control means 11 reads the setting information corresponding to the extracted program genre information from the table stored in the setting storage means 12 (step S3). Next, the control means 11 determines whether there is a difference between the current setting information and the next setting information (step S4). If the setting information is the same, the process ends. If the setting information is different, the current setting is changed to the next setting (steps S5 to S7).

Here, a method of changing from the current setting to the next setting will be described with reference to FIG. For example, the case where the current set value for the volume is the set value A, and the program genre is changed and set to the set value B by changing the channel will be described. Here, for example, + a in FIG. 2 means that the luminance is increased by a step from the standard setting REF (REF in FIG. 7 is an example and is not limited to the position in FIG. 7). The step value s is a value obtained by equally dividing the difference between the set values A and B by a predetermined value (determined within a range where the elapsed time T does not exceed the predetermined time). When the difference between the set value B and the set value A is the difference X = (B−A), the step value is s, the step time is t, and the time required for the change from the set value A to B is T ,
T = {(BA) / s} .t = (X / s) .t
It becomes. That is, when there is a large setting change, it takes time to shift to the next setting state.

  In addition, when there are a plurality of change candidates such as volume, sound quality, brightness, and contrast for audio and video, they are not executed in order but are executed simultaneously (that is, in parallel). That is, the volume, sound quality, luminance, and contrast are changed by one quantized step at every predetermined step time t.

  Next, a case where the channel is switched before the change to the next setting is completed will be described with reference to FIG. In this example, a case will be described in which the genre of the program changes due to the channel being switched. New program genre information is acquired at time T1 in the middle of changing from the set value A to the next set value B at the step time t, and the new set value C is read from the table of the setting storage means 12. Explain the case. In this case, control is performed so as to gradually change to the set value C from the current set state. That is, the setting value being changed is always managed by the control means 11, and when there is a channel change and, as a result, the program genre has changed, the difference between the value being changed and the setting value C When the difference amount is the difference Y, the characteristic (volume in FIG. 8) is changed over (Y / s) · t time.

  In the first embodiment, the description has been made on the assumption that the table as shown in FIG. 2 is stored in the setting storage means 12. However, as shown in FIGS. May be stored. Control using the tables of FIGS. 9A and 9B will be described. In FIG. 9A, the values of a_t, b_t, c_t, d_t, e_t, f_t, g_t, h_t, i_t, j_t, and k_t are the same as those of the display unit 8 for volume, sound quality, luminance, contrast, and saturation. The step value is quantized in advance within a range that can be displayed or output by the audio output means 9. In FIG. 9B, the values of a_b, b_b, c_bt, d_b, e_b, f_b, g_b, h_b, i_b, j_b, k_b are the same as those of the display means 8 for volume, sound quality, luminance, contrast, and saturation. The step value is quantized in advance within a range that can be displayed or output by the audio output means 9.

  The control means 11 that has grasped that the channel has been switched to the BS digital broadcast reads the next setting information using the BS digital broadcast table (FIG. 9B) of the setting storage means 12. For example, when the program genre information of the program to be viewed is “variety”, information that the volume is increased (+ b_b) from the standard setting is acquired. For the sound quality (high sound), sound quality (low sound), luminance, contrast, and saturation, the control unit 11 reads the setting information from the table, and the control unit 11 further requests the video signal generation unit 6 and the audio signal generation unit 7 as desired. Give instructions to change the amount of change. The video signal generation unit 6 and the audio signal generation unit 7 receive an instruction from the control unit 11 and perform control corresponding to a desired change amount.

  As described above, according to the digital broadcast receiving apparatus of the first embodiment, when adjusting video characteristics and / or audio characteristics for each program genre, the current video characteristic setting and / or audio characteristic setting is used. Until the next video characteristic setting and / or audio characteristic setting is reached, control is performed such that the characteristic is changed step by step by a predetermined change amount every predetermined time, thereby reducing the uncomfortable feeling felt by the viewer ( That is, it is possible to make it difficult for viewers to feel unnatural changes in video characteristics and audio characteristics.

  Further, according to the digital broadcast receiving apparatus of the first embodiment, it is determined whether or not the genre has changed only when the viewer changes the channel or when the program is switched, so there is no need to constantly monitor the change of the genre. .

  Further, in the digital broadcast receiving apparatus of the first embodiment, setting information is individually prepared for networks such as terrestrial digital broadcasting, BS digital broadcasting, and CS digital broadcasting, and video output characteristics and / or based on these individual setting information When adjusting the audio output characteristics, adjustments corresponding to the video quality and / or audio quality of the broadcast program in each network can be performed, and the discomfort given to the viewer can be further reduced.

Embodiment 2. FIG.
In the first embodiment, the automatic control method for displaying one program on one screen has been described. However, the present invention can also be applied to an automatic control method for displaying a plurality of programs on one screen. . In the second embodiment, an automatic control method when two programs are displayed on one screen will be described.

  FIG. 10 is a block diagram schematically showing the configuration of the digital broadcast receiving apparatus according to Embodiment 2 of the present invention. As shown in FIG. 10, the digital broadcast receiving apparatus according to the second embodiment selects the first antenna 1 that receives broadcast radio waves, the second antenna 13 that receives broadcast radio waves, and the broadcast radio waves. Video data, audio data, and program information data from a first tuner 2 that performs demodulation, a second tuner 14 that performs demodulation by selecting broadcast radio waves, and multiplexed data of video data, audio data, and program information data Demultiplexing means 3, a video decoding means 4 for decoding the video data separated by the demultiplexing means 3, an audio decoding means 5 for decoding the audio data separated by the demultiplexing means 3, and a video A video signal generating means 6 for generating a video signal by adding a necessary synchronization signal or the like from the decoded video data decoded by the decoding means 4, and an analog signal for the decoded audio data decoded by the audio decoding means 5. An audio signal generation means 7 for converting to a video signal; a video output means 8 such as a display monitor; a first audio output means 9 such as a speaker; and a second audio output means 18 such as a speaker. Have. In addition, the digital broadcast receiving apparatus according to the second embodiment outputs, for example, an operation means 10 such as a remote controller and a control means 11 for controlling the apparatus for the viewer to operate the apparatus. It has setting storage means 12 such as a non-volatile memory for storing the parameter setting values of the characteristics of the video signal and the characteristics of the audio signal to be output.

  The first tuner 2 selects and extracts a target carrier from the carrier included in the broadcast radio wave received by the first antenna 1, and then demodulates the carrier to generate a first digital multiple signal. The second tuner 14 selects and extracts a target carrier from the carrier included in the broadcast radio wave received by the second antenna 13, and then demodulates the carrier to generate a second digital multiplexed signal. . Both the first digital multiple signal and the second digital multiple signal are input to the demultiplexing means 15. The demultiplexing means 15 converts the first digital multiplexed signal and the second digital multiplexed signal into first video data, first audio data, first program information data, second video data, and second Audio data and second program information data. Since the separated video data and audio data are in an encoded state, they are decoded by the video decoding means 4 and the audio decoding means 5. The decoded first decoded video data and the second decoded video data are subjected to video synthesis processing by the video signal generation means 16 in order to display them on one screen.

  FIG. 11 is a diagram showing a case of PinP (Picture in Picture) display as an example of displaying two programs on one screen. The case where the decoded first video data is displayed in the first display area 30 and the decoded second video data is displayed in the second display area will be described.

  First, the control means 11 extracts 1st program genre information from 1st program information data. Further, the control means 11 extracts the second program genre information from the second program information data. Next, based on the extracted first program genre information, first setting information relating to volume, sound quality, luminance, contrast, and saturation is read from the table in the setting storage means 12. Also, based on the extracted second program genre information, second setting information relating to volume, sound quality, brightness, contrast, and saturation is read from the table in the setting storage means 12.

  The first setting information and the second setting information determine video characteristics and audio characteristics for displaying or outputting the first program and the second program, respectively. The control means 11 notifies the video signal generation means 16 of the set values of brightness, contrast, and saturation in the first setting information, and the video signal generation means 16 responds to the set values of brightness, contrast, and saturation. The video signal adjustment is performed on the first video data. In addition, the control unit 11 notifies the video signal generation unit 16 of the set values of luminance, contrast, and saturation in the second setting information, and the video signal generation unit 16 sets the set values of luminance, contrast, and saturation. Video signal adjustment corresponding to the second video data is performed. Next, the video signal generation means 16 performs a video data combining process so that the first decoded video data and the second decoded video data become a display screen as shown in FIG. Further, the video signal generating means 16 outputs the video signal at a predetermined timing and adds a synchronization signal.

  Further, the first decoded audio data and the second decoded audio data are converted into the first audio signal and the second audio signal by the audio signal generating unit 17, and the first audio output unit 9 and the second audio output unit. 18 is input. As a result, the viewer can hear the first audio signal and the second audio signal as sounds output from the first audio output means 9 and the second audio output means 18.

  In consideration of the usability on the viewer side, since there are few usages in which the audio of two programs is mixed and output from the speaker, the first audio output means 9 is a speaker, and the second audio is output. The output means 18 is preferably a line output.

  Next, a flowchart of the video characteristic / audio characteristic automatic setting method in the digital broadcast receiving apparatus according to the second embodiment will be described. When the viewer changes the channel and the program changes, or when the content of the first program changes due to the switching of the viewing program, the control means 11 based on the first program genre information is the same as in the first embodiment. Similarly, setting is performed so as to be the next set value in accordance with the flowchart shown in FIG. Here, the control means 11 performs the flow shown in FIG. 6 in parallel by the number of tuners. That is, the processing from step S1 to step S7 is performed on the program received by the second tuner 14 while the processing from step S1 to step S7 is executed for the program received by the first tuner 2. Can be executed. In a general real-time OS (operating system), such a plurality of processes can be managed in units called tasks, and each task can be performed in a time-sharing manner. In the digital broadcast receiving apparatus according to the second embodiment, the control unit 11 includes a real-time OS function.

  For example, when the first tuner 2 is viewing a program whose genre is “movie” and the channel is switched by the operation unit 10 and a program whose genre is “news” is viewed, the control unit 11 stores the setting. The setting information of the genre “news” is read from the means 12, and information that the volume is increased by a from the standard setting and the luminance is decreased by g is acquired. Thereby, the control unit 11 controls the video signal generation unit 16 and the audio signal generation unit 17 so as to change from the current set value to the next set value at a predetermined step time t. Note that the video signal generation unit 16 combines the first decoded video data and the second decoded video data at a predetermined timing regardless of whether the setting is changed, and generates the display screen shown in FIG. Then, a video signal is generated by adding necessary synchronization signals and the like. The generated video signal is displayed by the video display means 8.

  Further, when the content of the program being watched by the second tuner 14 is changed by the operation of the viewer, the control means 11 is based on the genre information of the second program as shown in FIG. In accordance with the flow shown in FIG. For example, when the second tuner 14 is viewing a program whose genre is “news” and the channel is switched by the operation unit 10 and a program whose genre is “movie” is viewed, the control unit 11 stores the setting. The setting information is read from the means 12, and information that the volume is lowered by a from the standard setting and the luminance is raised by g is acquired. Thus, the control unit 11 controls the video signal generation unit 16 and the audio signal generation unit 17 so that the step value is changed at a predetermined step time t from the current set value to the next set value. The meaning of the predetermined quantized step value is the same as in the first embodiment. Further, the video signal generating means 16 combines the first decoded video data and the second decoded video data at a predetermined timing depending on whether or not the setting is changed, and generates the display screen shown in FIG. A video signal is generated by adding a necessary synchronization signal or the like. The generated video signal is displayed by the video display means 8.

  FIG. 12 shows how the control means 11 controls the volume in terms of time when the program contents change simultaneously while the first tuner 2 and the second tuner 14 are watching the program. is there. At the same time, when the contents of the program change, as shown in FIG. 12, control is performed so as to change the set value at every predetermined step time t. Although only the sound volume has been described here, the same control is performed for sound quality (high sound), sound quality (low sound), luminance, contrast, and saturation.

  In the second embodiment, a method of automatically controlling video characteristics and audio characteristics according to a program genre has been described. However, even with the same genre, it can be controlled with different setting information depending on a network. In this case, the same control is performed using different setting information for each network as shown in FIGS. 9A and 9B as a table stored in the setting storage unit 12.

  For example, a case will be described in which BS digital broadcasting is viewed while switching networks while viewing a program whose genre is “news” in terrestrial digital broadcasting. When the viewer performs an operation for switching the network using the operation means 10 while viewing the terrestrial digital broadcast, the control means 11 detects this and instructs the first tuner 2 to switch the network. . Upon receiving the network switching instruction, the first tuner 2 switches to the corresponding network, selects and extracts a target carrier wave, and demodulates it to generate a digital multiplexed signal. The digital multiplexed signal output from the first tuner 2 is separated into video data, audio data, and program information data by the first demultiplexing means 3. The program information data separated by the first demultiplexing means 3 is stored on a memory (not shown) and can be read by the control means 11. The control means 11 extracts program genre information included in program information data on a memory (not shown).

  The control means 11 that has grasped the switching to the BS digital broadcast reads the next setting information using the BS digital broadcast table of the setting storage means 12. For example, when the genre information of the program to be viewed is “variety”, information that the volume is increased by + b_b from the standard setting is acquired. The control means 11 reads out setting information from the table for sound quality (high sound), sound quality (low sound), brightness, contrast, and saturation, and further generates video signal generation means for video data and audio data of the program whose genre has been changed. 16 and the audio signal generation means 17 are instructed to change the characteristics by a desired change amount. The video signal generating unit 16 and the audio signal generating unit 17 receive a command from the control unit 11 and perform control corresponding to a desired change amount.

  In the first and second embodiments, when there are a plurality of change candidates such as volume, sound quality, brightness, and contrast for audio and video, only one step quantized at a predetermined step time t is used. Although the volume, sound quality, brightness, and contrast are each changed, control may be performed so that all settings are completed simultaneously. For example, when changing the brightness and volume, if the time for setting the volume is longer than the time for setting the brightness, the brightness setting is changed slowly until the volume setting is completed. A control method for this will be described next.

  When the volume setting is increased by 4 and the luminance is decreased by 2, the volume setting time takes 4t hours and the luminance setting takes 2t hours. Therefore, when adjusting the brightness, control is performed such that one step is raised every time t, not one step every time t. That is, assuming that the volume setting step value to be changed is P and the luminance setting value is Q, if P> Q, the luminance is changed by one step for each time (P / Q) · t. If P ≦ Q, the volume is changed by one step for each time (Q / P) · t. Thereby, the adjustment of the volume and the luminance can be finished at the same time. When (P / Q) does not become an integer value, it is handled by rounding off. That is, as shown in FIG. 13, when the volume is set up by 5 and the brightness is lowered by 2, the brightness is lowered by one step at time 3t and at time 5t.

  As described above, according to the digital broadcast receiving apparatus according to the second embodiment, even when viewing a plurality of programs, when a genre change occurs in any program, the video corresponding to the program Since the video characteristics and the audio characteristics of the audio are changed step by step by a predetermined amount every predetermined time, there is no sudden characteristic change, and the discomfort given to the viewer can be reduced for a plurality of screens.

  Further, when adjusting both the video output characteristic and the audio output characteristic, the control is performed so as to finish the adjustment at the same time. Therefore, it is possible to avoid that either adjustment is prolonged and the viewer feels uncomfortable.

  In the first and second embodiments, a television that can receive digital broadcasts has been described as an example. However, the present invention is also applicable to the case of playing back content on a hard disk recorder or DVD recorder that records and plays back digital broadcasts. Can do. That is, the multiplexed data output from the tuner is recorded on the hard disk or DVD, and the multiplexed data is read out during reproduction and demultiplexed to generate video data, audio data, and program content data. The control after demultiplexing can be similarly realized by gradually changing the video output characteristic and the audio output characteristic at the predetermined step time t as described above.

It is a block diagram which shows roughly the structure of the digital broadcast receiver which concerns on Embodiment 1 of this invention. It is a figure which shows the content of the setting information table according to program genre stored in the setting storage means of the digital broadcast receiver which concerns on Embodiment 1. FIG. It is a figure which shows the concept of the step value of the volume in Embodiment 1 and 2. FIG. 6 is a diagram showing a concept of a luminance step value in the first and second embodiments. FIG. FIG. 4 is a diagram showing a concept of a contrast step value in the first and second embodiments. 4 is a flowchart illustrating a control procedure for video output characteristics and audio output characteristics in the first embodiment. 6 is a diagram schematically showing a volume setting changing method according to Embodiment 1. FIG. 6 is a diagram schematically showing a volume setting changing method according to Embodiment 1. FIG. (A) And (b) is a schematic diagram which shows the content of the setting information table classified by network and every program genre in Embodiment 1. FIG. It is a block diagram which shows roughly the structure of the digital broadcast receiver which concerns on Embodiment 2 of this invention. 10 is a diagram illustrating an example of a configuration of a display screen in Embodiment 2. [FIG. 10 is a diagram illustrating an example of a recorded information management table in Embodiment 2. FIG. It is a figure which shows typically the volume and brightness | luminance setting change method in Embodiment 1 and 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 antenna (1st antenna), 2 tuner (1st tuner), 3 demultiplexing means, 4 video decoding means, 5 audio decoding means, 6 video signal generation means, 7 audio signal generation means, 8 video display means, 9 audio output means (first audio output means) 10 operation means 11 control means 12 setting storage means 13 second antenna 14 second tuner 15 demultiplexing means 16 video signal generating means 17 Audio signal generating means, 18 second audio output means, 30 first display area, and 31 second display area.

Claims (7)

Demultiplexing means for separating and outputting the video data, the audio data, and the program content data from data obtained by multiplexing the video data of the broadcast program, audio data, and program content data including genre information;
Setting storage means for storing setting information in which at least one of video characteristics and audio characteristics is set for each genre information;
Signal generating means for adjusting a characteristic of at least one of the video data and the audio data and outputting a video signal and an audio signal based on the video data and the audio data;
The genre information included in the extracted program content data is monitored, and when the change of the genre information is detected, the setting information in the changed genre is read from the setting storage means, and the read setting information And a control means for controlling the signal generating means so as to change the characteristic step by step by a predetermined change amount at predetermined time intervals. The data processing means receives the multiplexed data of a plurality of broadcasts, separates and outputs the video data, the audio data, and the program content data for each of the plurality of broadcasts,
The control means performs detection of the genre information for each of the plurality of broadcasts, and changes the characteristics of the broadcasts in which the genre information of the plurality of broadcasts is changed. The digital broadcast receiver according to 1. The signal generating means is
Video signal generating means for adjusting the characteristics of the video signal;
The digital broadcast receiving apparatus according to claim 1, further comprising: an audio signal generation unit that adjusts characteristics of the audio signal.   4. The digital broadcast receiving apparatus according to claim 1, wherein the genre information is detected at least one of when a channel is changed and when a broadcast program is switched.   5. The digital broadcast receiving apparatus according to claim 1, wherein the setting storage unit stores setting information for each of terrestrial digital broadcasting, BS digital broadcasting, and CS digital broadcasting.   When the genre information changes during the adjustment instruction to the signal generation unit, the control unit performs control so that the setting state immediately before the time of the change is changed to the setting after the change. 6. The digital broadcast receiver according to claim 1, wherein the digital broadcast receiver is a digital broadcast receiver.   7. The control unit according to claim 1, wherein when the characteristics of both the video data and the audio data are adjusted, the control unit performs control so that both adjustments are completed at the same time. 8. Digital broadcast receiver.

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