JPH11313267A - Video signal processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain multi-screen display capable of quickly selecting a broadcast station program by varying a display time on a small screen in accordance with the reception state of radio wave. SOLUTION: A television signal received by an antenna 2 is received by a television signal reception circuit 3, which outputs a video signal, and a reception sensitivity discrimination section 4 discriminates the propriety of a reception state. The video signal is stored in a storage area of a memory 5b corresponding to a small screen designated for each field by a video signal processing section 5. When the discrimination section 4 discriminates an excellent reception of a channel assigned to the small screen under the instruction of a control section 6, the discrimination result is displayed on each small screen of a multi-screen of a display section 8 in a long display time and when the section 4 discriminates that the reception state of the channel is not excellent, the result is displayed on the display section 8 in a shorter display time and an audio signal is muted by a mute section 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a video signal processing apparatus used in a television receiver having a multi-screen display function for displaying images of a plurality of broadcasting stations in one screen.

[0002]

2. Description of the Related Art Conventionally, a television receiver has been introduced with a multi-screen display function for displaying images of a plurality of broadcasting stations in one screen, thereby enabling a user to easily select a broadcasting station. I have.

[0003] Such a multi-screen display function divides a screen into a plurality of small screens, displays a reduced image corresponding to a video signal of each broadcast station received on each small screen for a certain period of time, and in a predetermined order. The display is repeated one after another. The user can select a desired broadcast station after observing the broadcast contents by looking at each of these small screens, and can switch to the normal screen of the selected broadcast station by performing a predetermined operation.

[0004]

In the above-mentioned conventional television receiver having a multi-screen display function, broadcast stations displayed on a small screen in a predetermined order are usually preset in advance. Here, even when each broadcasting station is normally received at the time of presetting, it may not be possible to receive normally, for example, the receiving sensitivity for a specific broadcasting station is deteriorated thereafter. In particular, such a situation frequently occurs in the case of an in-vehicle television receiver or the like whose reception sensitivity varies every moment. In a portable television receiver, a similar situation occurs when the direction of the antenna is changed or when the portable television receiver is moved.

[0005] However, in the conventional multi-screen display function, the display of each broadcasting station is performed for a fixed time in a preset order, regardless of the receiving state of the broadcasting station. In other words, it is useless to display a broadcasting station with poor reception sensitivity and the possibility that the user is not likely to select it as a desired station in the same way as a broadcasting station with a good reception state, which is unnecessary when the user selects a broadcasting station. This hinders quick selection of a broadcasting station. In addition, while receiving a broadcast station with poor reception sensitivity, not only the video but also the audio quality often deteriorates, and outputting the audio may cause discomfort to the user.

Accordingly, the present invention has been made in view of such a problem, and an object of the present invention is to change a display time according to the quality of a radio wave reception state during multi-screen display.
It is an object of the present invention to provide a video signal processing device in a television receiver that can quickly select a broadcasting station without reducing time loss due to useless small-screen display, outputting no audio that gives a user discomfort.

[0007]

According to a first aspect of the present invention, there is provided a video signal processing apparatus for receiving a radio wave of a television broadcast and including the obtained video signal in at least one small screen. A video signal processing apparatus that performs processing for displaying an image on a multi-screen, comprising: a receiving unit that receives a transmission radio wave of a designated broadcast station among a plurality of broadcast stations and outputs a video signal; Determining means for determining whether the reception state is good, and a storage area capable of storing video signals for at least one field and corresponding to one small screen designated in advance in the multi-screen, A storage unit capable of storing the video signal output by the receiving unit while updating the image signal at least for each field; and a predetermined order by designating one broadcasting station for each small screen in the multi-screen. Control means for instructing the receiving means to repeatedly receive each broadcasting station, and controlling the video signal of the receiving broadcasting station to be stored in the storage area as a moving image updated at least for each field. The control means controls the storage area to store the video signal for a first display time when the receiving station determines that the receiving state is good by the determination means, When it is determined that the reception state is not good, control is performed such that the video signal is stored in the storage area for a second display time shorter than the first display time.

According to the first aspect of the present invention, the transmission radio wave is received by the receiving means and the video signal is output under the instruction of the control means in accordance with a predetermined order determined from among a plurality of broadcasting stations. At the same time, the quality of the reception state is determined by the determination means. Each broadcast station is designated one small screen of a multi-screen consisting of a plurality of small screens, and the video signal to be displayed here is associated with a specific storage area of the storage means. Then, the control unit controls the received video signal of the broadcast station to be stored in the corresponding storage area as a moving image. At this time, control is performed such that the first display time is stored when the reception state is good, and the second display time is shorter than the first display time when the reception state is not good from the determination result of the determination means. .

Therefore, the display time of the moving image of each broadcasting station on the multi-screen can be varied according to the quality of the reception state, and the display time of the broadcasting station where the reception state deteriorates and it becomes difficult to grasp the broadcast contents is shortened. Is done. Therefore, the display of unnecessary small screens on the multi-screen is minimized, and the contents of a large number of broadcast stations are quickly confirmed. In particular, under a situation where the reception state fluctuates every moment, an appropriate multi-screen display is performed.

According to a second aspect of the present invention, there is provided a video signal processing apparatus according to the first aspect, wherein the determining means determines a reception level of the receiving means. If the reception level is higher than a predetermined threshold, it is determined that the reception state is good.If the reception level is not higher than the threshold, it is determined that the reception state is not good. Features.

According to the second aspect of the present invention, when the transmission radio wave of the broadcasting station is received by the receiving means, the reception level is determined, and is compared with a predetermined threshold value. The quality of the state is determined by the determination means.

Therefore, when the reception level is reduced due to the radio wave propagation, unnecessary small screen display on the multi-screen is minimized by the same operation as the first aspect of the present invention. The contents of many broadcasting stations can be quickly confirmed.
In particular, when the reception level fluctuates frequently, such as for in-vehicle use, appropriate multi-screen display is performed.

According to a third aspect of the present invention, there is provided a video signal processing apparatus according to the first or second aspect, wherein the control means includes the second signal processing means.
Is set to zero, and only the broadcasting stations whose reception conditions are determined to be good by the determination means are controlled to be stored in the storage area.

According to the third aspect of the present invention, the display time when the reception state is not good is zero based on the result of the judgment by the judgment means, and only the broadcasting stations having the good reception state are displayed on the multi-screen. Is controlled to

[0015] Therefore, on the multi-screen, channels with poor reception conditions are skipped, and the contents of a large number of broadcasting stations can be confirmed more quickly. In particular, when the number of divisions of the multi-screen is large, the time loss of channel selection is greatly reduced.

According to a fourth aspect of the present invention, there is provided a video signal processing apparatus according to any one of the first to third aspects, wherein the control means comprises:
In the first multi-screen display, control is performed so that the received video signal of the broadcast station is stored as a still image in the storage area, and in the second and subsequent multi-screen displays, the video signal of the receiving broadcast station is displayed at least in the field. It is characterized in that control is performed so as to be stored in the storage area as a moving image updated every time.

According to the fourth aspect of the present invention, when the multi-screen display is activated, first, a control is performed so that the received still image of the broadcast station is displayed on the designated small screen.
In the second and subsequent multi-screen display after one round, control is performed so that the moving image of the broadcast station being received is displayed on the designated small screen.

Therefore, immediately after the start of the multi-screen display, a still image of each channel is displayed once in a short time, and thereafter, the normal multi-screen display is performed, and the moving image of the receiving channel and the non-receiving channel are displayed. Can be confirmed. Therefore, it is easy to quickly grasp the contents of all the specified channels immediately after the start of the operation, and the multi-screen display appropriately corresponding to the quality of the reception state is performed.

According to a fifth aspect of the present invention, there is provided a video signal processing apparatus as set forth in any one of the first to fourth aspects, wherein the broadcast station being received is the determination means. And mute control means for controlling so as to mute the audio signal accompanying the video signal when it is determined that the reception state is not good.

According to the fifth aspect of the present invention, if the receiving condition is not good based on the result of the judgment by the judging means, the audio signal accompanying the video signal of the receiving broadcasting station is muted. Control so that sound is not output.

Therefore, when the reception condition deteriorates, it is prevented that the sound of the reproduction quality deteriorated is output from the speaker or the like, and the multi-screen display is performed without making the user unpleasant sound. Will be

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a video signal processing apparatus according to an embodiment of the present invention. The video signal processing device 1 shown in FIG. 1 includes a television signal receiving circuit 3, a reception sensitivity determining unit 4, a video signal processing unit 5, a control unit 6, a mute unit 9, and an amplifier 10. Further, the video signal processing unit 5 includes a video signal processing circuit 5a, a memory 5b, and a memory control unit 5c. The video signal processing device 1 has an antenna 2 for receiving a transmission radio wave from a broadcasting station.
And an operation unit 7 for performing various settings and the like by operating a predetermined key
And a display unit 8 for displaying a video signal on a normal screen or a multi-screen, and a speaker 11 for outputting an amplified audio signal.

In FIG. 1, when a television signal is received from an antenna 2, a channel of a broadcast station to be received is instructed to a television signal receiving circuit 3 by a control unit 6, and a frequency of the signal of the corresponding channel is changed to a signal of the corresponding channel. After being tuned and selected and amplified, a video signal is output from the television signal receiving circuit 3.

On the other hand, the reception level of the channel being received is output from the television signal receiving circuit 3 to the reception sensitivity determination section 4. The reception sensitivity determination unit 4 compares the reception level of the currently receiving channel with a preset threshold value to determine whether the reception state is good. In other words, the reception state of the currently receiving channel is determined substantially depending on the reception level. Therefore, if the reception level is lower than a certain threshold value, the reception state of the channel is determined to be poor, and a multi-screen Is to change the display time.

The video signal processing section 5 performs a process for multi-screen display on the video signal input from the television signal receiving circuit 3. That is, a process for displaying a video signal corresponding to the reception channel on one small screen designated by the control unit 6 from a plurality of small screens in the multi-screen is performed.

Here, FIG. 2 shows a multi-screen consisting of 12 divided small screens displayed on the screen of the display unit 8 as the multi-screen of the present embodiment. On the 12 small screens on the multi-screen, the broadcasting station is set to a preset channel by the processing described later, and the number of the channel is displayed at the lower right. Each of the small screens indicates a channel whose reception state has been determined to be good by the reception sensitivity determination unit 4, and for convenience, "o"
n air ”is displayed. Channels with no “on air” indication have either a low reception level and poor reception, or no radio waves are received.

When the multi-screen display function operates, the control unit 6 instructs a receiving operation for each channel on each small screen, and displays a preset video signal corresponding to each channel as a still image. Thereafter, the receiving channels are sequentially displayed as moving images in a predetermined order for a predetermined display time, and the other channels are controlled so as to hold still images. In the 12 small screens, the display of the moving image is repeated according to the channel order of 1 to 12, for example (FIG. 2A),
Starting from the upper left channel 1 and reaching the lower right 12 channels, it returns to the first channel and repeats the display. At this time, control is performed so that the display time of the channel displayed as “on air” is lengthened, and the display time of the channel not displayed as “on air” is shortened or skipped. Will be described later.

In the example shown in FIG. 2A, when a multi-screen display is performed by skipping a channel having a poor reception condition, small screens are displayed in the order of 1, 3, 4, 6, 8, 10, and 12. Will be repeated. Similarly, in the example of FIG. 2B, 1, 3, 4, 6, 8, 10, 12,
The display on the small screen is repeated in the order of 14, 16, and 38. Note that, even when the reception state fluctuates with time, the channel to be displayed is appropriately changed.

The image data for one field for displaying the multi-screen of FIG. 2 on the display unit 8 is held in the memory 5b of the video signal processing unit 5. In other words, the memory 5b has a data size equivalent to the number of pixels of the display unit 8, and its address configuration corresponds to the arrangement of each pixel of the display unit 8. At a predetermined timing, reading or writing is performed for each field. Note that reading or writing may be performed for each frame.

The video signal processing circuit 5a performs a predetermined reduction process on the video signal of the channel to be displayed as a small screen to generate reduced video data, and writes the reduced video data to an address of the memory 5b corresponding to the display position. I do. That is, since the small screen in the multi-screen is smaller in size than the normal screen and therefore the number of necessary pixels is small, for example, processing such as thinning out the video signal at predetermined intervals in the vertical and horizontal directions is performed. It generates reduced video data and displays it on a small screen.

In the television signal receiving circuit 3,
An audio signal of the receiving broadcast station is output in addition to the video signal, and input to the mute unit 9. This mute unit 9 is controlled by the control unit 6
Means to mute the audio signal under the instruction of. That is, when the mute is activated, the audio signal is muted and is not output to the amplifier 10, whereas when the mute is released, the audio signal is not muted and is output to the amplifier 10 as it is. The amplifier 9 amplifies the audio signal with a predetermined gain and outputs the amplified audio signal to the speaker 11 so that the user can hear the audio.

Next, the multi-screen display processing according to the embodiment of the present invention will be described with reference to the flowcharts shown in FIGS. In the following description, a case will be described in which, for example, a multi-screen display process is performed in an in-vehicle television receiver.

In the following description, when a user of the television receiver sets desired settings, the user presses various keys on the operation unit 7 to set a preset channel registration key, a multi-screen display key, and a channel up key. , Channel down key, channel determination key, and the like. Specific functions of these keys will be described below.

As shown in FIG. 3, in step S1, it is assumed that the television receiver is in a normal screen display state. That is, an image of the set channel being received is displayed on the entire display unit 8.

In step S2, it is monitored whether or not the preset channel registration key of the operation unit 7 has been pressed. The preset channel registration key is pressed when a plurality of broadcast stations to be received are automatically registered as preset channels. In the case of this embodiment, 12 preset channels are registered.

If the preset channel registration key is pressed in step S2 (step S2; YE
S) In step S3, a preset channel automatic registration process is performed. This automatic registration process of the preset channel gradually changes the tuning frequency of the television signal receiving circuit 3, searches for 12 broadcasting stations having good reception sensitivity, and automatically registers as 12 preset channels. It is. After the process in step S3, the process proceeds to step S5.

On the other hand, if the preset channel registration key has not been pressed in step S2 (step S2).
2; NO), in a step S4, it is monitored whether or not the multi-screen display key of the operation unit 7 is pressed. The multi-screen display key activates a multi-screen display on the display unit 8 for grasping the preset broadcast content of each channel.

If it is determined in step S4 that the multi-screen display key has been pressed (step S4; YES), the process proceeds to step S5. On the other hand, if the multi-screen display key is not pressed in step S4 (step S4; N
O), returning to step S1, the normal screen display is maintained,
Steps S1 to S4 are repeated again.

In step S5, setting of multi-screen display on the display unit 8 is performed. That is, various settings necessary for switching the television receiver currently displayed on the display unit 8 to the normal screen display state to the multi-screen display state of the small screen divided into 12 are performed.

In step S6, the mute section 9 starts mute for the audio signal. As a result, the audio signal output from the television signal video signal circuit 3 accompanying the video signal is not output from the speaker 11 via the amplifier 10, and the still image of each channel is displayed on the multi-screen. You are ready.

In step S7, predetermined channels to be displayed are set in a receiving state in order from the first registered channel among the preset channels, and the still image is displayed on a predetermined small screen divided into 12 parts of a multi-screen. indicate. First, a still image of the first registered channel among the preset channels is displayed on the upper left of the multi-screen. The channel displayed in the normal screen display state in step S1 may be stored, and the display may be started from that channel.

In step S8, a setting is made so that the reception state is switched from the channel displayed in step S7 to a predetermined channel among the preset channels to be displayed next. Normally, among the preset channels, the first to twelfth registered channels are switched one by one.

In step S9, it is determined whether or not all the preset channels have been displayed on the multi-screen. As a result, when the display has been completed and the still image of each channel is displayed on the multi-screen (step S9; YES), step S1 in FIG. 4 is performed.
Then, if the display has not yet completed one cycle and only the still images of some channels are displayed on the multi-screen (step S9; NO), the process returns to step S7 to perform the processing for the next channel. .

In steps S7 to S9, small screens are sequentially displayed.
After storing the small screens for 12 pieces, 12 still images may be displayed at a time.

Next, the subsequent processing will be described with reference to FIG.

In step S10, a channel to be displayed first is set to a reception state in order to sequentially display moving images on a multi-screen in which a still image is displayed on each small screen. Usually, during a preset channel,
Set the first registered channel to the receiving state,
The moving image is displayed at a predetermined position on the multi-screen for a certain period of time while performing the processing described below.

In step S11, it is determined whether the reception state of the receiving channel is good. That is, the above-described reception sensitivity determination unit 4 determines whether the reception level has reached a certain threshold value, and obtains sufficient reception quality to display a moving image on a small screen on a multi-screen. It is to determine whether or not.

As a result of the determination in step S11, when it is determined that the reception level is high and the reception state is good (step S11; YES), the display time of the moving image when the reception state is good is determined in step S12. Timer T that determines
Set 1. In the present embodiment, T1 is determined so that the display time of the moving image is about 4 seconds.

On the other hand, as a result of the determination in step S11, when it is determined that the reception level is low and the reception state is not good (step S11; NO), the display of the moving image when the reception state is not good is performed in step S13. A timer T2 for setting a time is set. By setting T2 to be smaller than T1, it is possible to reduce the display time of a moving image of a channel for which it is difficult to grasp the broadcast contents during multi-screen display.

The settings of the timers T1 and T2 may be fixed in the video signal processing device 1 in advance, or may be made variable by a predetermined operation of the user.

In step S14, it is determined whether or not the elapsed time from the display of the moving image has exceeded the set value of the timer. As a result of the determination in step S14, when the display time of the moving image exceeds the timer set value and the time to be displayed has elapsed (step S14; YES), in step S15, the moving image of the currently displayed channel is displayed. The still image at the point in time is displayed.

Then, in step S16, step S
Similarly to 6, the mute unit 9 activates mute for the audio signal. That is, the audio signal is not output from the speaker 10 because the moving image is no longer displayed. Thereafter, in step S17, the channel is switched to the next channel to be received, and then the process returns to step S11.

On the other hand, as a result of the determination in step S14, if the display time of the moving image has not reached the timer set value and the time to be displayed has not elapsed (step S14; N).
O), the process shifts to step S18, and the moving image display for the channel being received is performed as it is.

In step S19, the mute section 9 cancels the mute for the audio signal. That is,
Since the mute may be in the activated state, for example, immediately after the start of the moving image display operation, the mute is released once. Thereby, the audio signal output from the television signal receiving circuit 3 accompanying the video signal is output from the speaker 11 via the amplifier 10.

In step S20, the presence or absence of a key input from the operation unit 7 is monitored. That is, the multi-screen display is automatically performed, but during this time, it is checked whether or not a key input by a user operation has been performed in order to allow the user to manually perform a desired operation.

If the result of determination in step S20 is that there is no key input (step S20; NO), step S14
And the display processing of the moving image is continued. On the other hand, if the result of determination in step S20 is that there is a key input (step S20; YES), the flow proceeds to step S21.

In step S21, it is determined whether or not the input key is a channel up key. As a result, when the channel up key is input (step S21; YES), the process proceeds to step S15.

That is, regardless of whether or not the timer set value has been reached, the moving image display for the channel being received is stopped, and the still image at that time is displayed in step S15. Thereafter, after the mute is activated, the setting for switching to the next channel is performed in step S17, and the process proceeds to step S11 to continue the same processing.

On the other hand, if the result of determination in step S21 is that there is a key input other than the channel up key (step S21; NO), the flow shifts to step S22 to determine whether or not the input key is a channel down key. Judge.

As a result, if the channel down key is input (step S22; YES), step S2
Move to 3. Then, in step S23, as in step S15, the moving image display for the channel being received is stopped, and the still image at that time is displayed. afterwards,
After the mute is activated in step S24, step S24
In step 25, switching is set to return to the channel received immediately before, and the process proceeds to step S11 to continue the same processing.

On the other hand, if the result of determination in step S22 is that there is a key input other than the channel down key (step S22; NO), the flow shifts to step S26 to determine whether or not the input key is a channel determination key. Judge.

As a result, if the channel determination key is input (step S26; YES), step S27
Then, if the input is a key input other than the channel determination key (step S26; NO), the flow proceeds to step S28. In step S28, an appropriate process according to the content of the input key is performed.

In step S27, the normal screen display is set for the receiving channel at the time when the channel determination key is input. That is, the state is switched from the multi-screen display state to the normal screen display state, and the moving image of the specific channel determined by the user is displayed on the entire display unit 8. Thereafter, the normal screen display state is maintained until the multi-screen display key is pressed again.

As a result of the above multi-screen display processing, the actual multi-screen displayed on the display unit 8 is as shown in FIG. FIG. 2A shows that the preset registration key is not pressed in the initial state when the reset button (not shown) is pressed (step S2; NO), and when the multi-screen display key is pressed (step S4; YES), the video signal is previously set. FIG. 2B shows an example of a case where a preset channel is displayed on the multi-screen in the processing apparatus 1. FIG.
2; YES). In the case of FIG. 2B, multi-screen display is performed from the upper left of the screen in the order of channels having a good reception state.

By performing the above-described multi-screen display processing, when a large number of broadcasting stations can be selected when using the video signal processing apparatus 1, a reception screen is displayed on the 12 divided small screens of the display unit 8. The moving images of the middle channel are sequentially displayed, and the still images of the channels not being received are displayed. Therefore, it is possible to grasp the contents of the video corresponding to the preset channel, and it is easy to select a desired broadcast station. At this time, the display time T2 of the moving image of the channel whose reception state is not good may be set short, and for example, the display may be skipped by setting T2 = 0.
Therefore, a moving image of a channel whose video content is difficult to grasp is not displayed, so that time loss of multi-screen display can be prevented and quick channel selection can be performed.

In the above description, the case where the signal level of the received signal is compared with a predetermined threshold value by the reception sensitivity determining unit 4 as the determination means for determining the quality of the reception state will be described. However, it is possible to determine whether the reception state is good or not using various methods such as determining a noise component of the video signal itself.

In the above description, the multi-screen is 12
The case where the screen is divided from the divided small screens has been described, but the present invention is also applied to a case where a multi-screen display is performed with an arbitrary number of divisions and a more freely divided shape. It is possible. FIG. 5 shows examples of various divided shapes in such a multi-screen display. For example, as shown in FIG.
As shown in (b), a large screen contains a small screen,
The present invention can be applied to a case where one of the screens divided into right and left is used for multi-screen display as shown in FIG.

[0069]

According to the first aspect of the present invention, the display time of a broadcasting station where the reception condition is deteriorated and it is difficult to grasp the broadcast contents is shortened. And a multi-screen display function capable of promptly checking the contents of a large number of broadcast stations and appropriately coping with the situation where the reception state changes every moment.

According to the second aspect of the present invention, even when the reception level is reduced due to the radio wave propagation condition, unnecessary small screen display on the multi-screen is suppressed, and a large number of small screens are quickly displayed. The present invention provides a multi-screen display function capable of confirming the contents of a broadcasting station and appropriately coping with a case where the reception level fluctuates frequently, such as in a vehicle.

According to the third aspect of the present invention, channels with poor reception conditions can be skipped on a multi-screen, and the contents of a large number of broadcast stations can be confirmed more quickly. A multi-screen display function is provided that can greatly reduce the time loss of channel selection even when the number is large.

According to the fourth aspect of the present invention, immediately after activation, a still image of each channel is displayed once in a short time, and thereafter, a normal multi-screen display is performed to display a moving image of the channel being received. And a multi-screen display in which a still image of a channel in a non-receiving state can be confirmed, and a multi-screen display function capable of minimizing a waiting time is provided.

According to the fifth aspect of the present invention, when the reception state is not good, the audio signal accompanying the video signal is muted, thereby deteriorating the reproduction quality giving the user discomfort. The state voice is not output from the speaker or the like, and a multi-screen display function that can be used comfortably is provided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of a video signal processing device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a multi-screen of a display unit according to the embodiment of the present invention.

FIG. 3 is a first flowchart showing a multi-screen display process according to the embodiment of the present invention.

FIG. 4 is a second flowchart showing a multi-screen display process according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a specific example of a divided shape of multi-screen display according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Video signal processing apparatus 2 ... Antenna 3 ... Television signal receiving circuit 4 ... Reception sensitivity determination part 5 ... Video signal processing part 5a ... Video signal processing circuit 5b ... Memory 5c ... Memory control part 6 ... Control part 7 ... Operation part 8 Display section 9 Mute section 10 Amplifier 11 Speaker

Claims (5)

[Claims] 1. A video signal processing apparatus for receiving a radio wave of a television broadcast and performing a process for displaying an obtained video signal on a multi-screen including at least one small screen, comprising a plurality of broadcast stations. Receiving means for receiving a transmission radio wave of a designated broadcasting station and outputting a video signal; determining means for determining whether a reception state of the receiving means is good; and a video signal for at least one field. Storage means capable of storing a video signal output by the receiving means at least for each field in a storage area corresponding to one pre-specified small screen in the multi-screen. A single broadcast station is designated for each small screen in the multi-screen, and the receiving unit is instructed to receive each broadcast station repeatedly in a predetermined order. Control means for controlling the video signal of the transmitting station to be stored in the storage area as a moving image updated at least for each field, wherein the control means determines that the receiving station is in a good reception state by the determining means. Is determined, the video signal is controlled to be stored in the storage area for a first display time, and when it is determined that the reception state is not good, the first storage is performed in the storage area. A video signal processing device which controls to store the video signal for a second display time shorter than the display time. 2. The method according to claim 1, wherein the determining unit determines a reception level in the receiving unit, and when the reception level is higher than a predetermined threshold, determines that the reception state is good. 2. The video signal processing device according to claim 1, wherein when the threshold value is not larger than the threshold value, it is determined that the reception state is not good. 3. The control unit controls the second display time to be zero and stores only the broadcast station whose reception state is determined to be good by the determination unit in the storage area. The video signal processing device according to claim 1 or 2, wherein 4. The control means controls to store a received video signal of a broadcasting station as a still image in the storage area in the first multi-screen display, and in the second and subsequent multi-screen displays, 4. The video signal processing apparatus according to claim 1, wherein control is performed such that a video signal of a middle broadcasting station is stored in the storage area as a moving image updated at least for each field. 5. A mute control means for controlling a mute of an audio signal accompanying the video signal when the receiving means determines that the receiving station is not in a good reception condition by the determining means. The video signal processing device according to any one of claims 1 to 4, characterized in that: