JPH09135394A - Television receiver for digital broadcasting - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a television receiver for digital broadcasting that reduces the psychological burden on the user due to the length of channel switching time. A moving image processing unit 113 creates several images in which moving images after channel switching are gradually increased, and a still image processing unit 114 gradually decreases in number still images before channel switching. Make a sheet of images. These outputs and the output from the MPEG decoder 17 are supplied to the switch circuits 115 and 116. When switching channels, the controller 18 switches the switch circuits 115 and 116.
The output of the still image processing unit 114, the output of the moving image processing unit 113, and the output of the MPEG decoder are sequentially displayed on the cathode ray tube 119, so that the still image before channel switching is gradually reduced, and the desired channel is reduced. The moving image of No. 1 gradually increases, and finally the image of the desired channel appears on the cathode ray tube 119.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver (H0) for digital broadcasting in a digital broadcasting system.
4N 5/44).

[0002]

2. Description of the Related Art Conventionally, there is known a technique of a television receiver which displays a still image at the time of image switching, instead of a disordered image due to a synchronous flow at the time of image switching or a blank black image. (JP-A 1-218
274). An example of this television receiver will be described below with reference to the drawings.

FIG. 6 shows a configuration example of a conventional television receiver configured to display an image before channel switching stored in an image memory of the television receiver at the time of channel switching. . In FIG. 6, 11 is an antenna, 12 is a tuner circuit, and 14 is A /
D conversion circuit, 18 controller, 19 remote control transmitter, 110 key switch, 111 microcomputer, 112 memory, 116 switch circuit, 117
Is a D / A conversion circuit, 118 is a video processing signal circuit, 11
Reference numeral 9 is a cathode ray tube, 61 is an intermediate frequency signal processing circuit, and 62 is a Y / C separation circuit.

The operation of the television receiver configured as described above will be described below. In FIG.
The received signal from the antenna 11 is supplied to the tuner circuit 12. The tuner circuit 12 selects a television signal of a desired channel, and this television signal is converted into a video intermediate frequency signal by the mixing circuit of the tuner circuit 12. The video intermediate frequency signal output from the tuner circuit 12 is supplied to the intermediate frequency signal processing circuit 61. In the intermediate frequency signal processing circuit 61, the video intermediate frequency signal is amplified and video detected, and the composite color video signal is supplied to the Y / C separation circuit 62. The Y / C separation circuit 62 converts the supplied composite color video signal into Y / C.
C separation is performed to form a luminance signal Y and color difference signals RY and BY, and the luminance signal Y and the color difference signals RY and BY are
It outputs to the A / D conversion circuit 14 and the switch circuit 116, respectively.

In a state in which the image is not switched, the luminance signal Y and the color difference signals RY and BY supplied from the Y / C separation circuit 62 through the switch circuit 116 are the three primary color signals in the video signal processing circuit 118. The signals are demodulated into R, G, B, and the three primary color signals R, G, B are supplied to the cathode ray tube 119,
The image is displayed.

On the other hand, in the A / D conversion circuit 14, the luminance signal Y and the color difference signal R- supplied from the Y / C separation circuit 62.
A / D conversion is performed on each of Y and BY. The A / D-converted image data is sequentially written at the address of the memory 112 designated by the controller 18.

When a channel switching command for switching the channel of the television signal is input to the microcomputer 111 from the remote control transmitter 19 or the key switch 110, a control signal is output from the microcomputer 111 to the controller 18. . Then, the controller 18 stops writing the image data in the memory 112 based on the input control signal. As a result, the image data for the last one frame is stored in the memory 112. The controller 18 reads this image data, performs D / A conversion by the D / A conversion circuit 117, reproduces the luminance signal Y and the color difference signals RY and BY, and supplies them to the switch circuit 116. Then, the controller 18 uses the switch circuit 11
A switch switching signal is output to 6, and the luminance signal Y, the color difference signals RY, BY, etc. from the D / A conversion circuit 117 are supplied to the video signal processing circuit 118. The luminance signal Y and the color difference signals RY and BY are demodulated by the video signal processing circuit 118 as the three primary color signals R, G, and B, and are supplied to the cathode ray tube 119 to display a still image.

The switching operation is performed while the still image is displayed on the cathode ray tube 119. This switching operation changes the image of the new video signal to the cathode ray tube 119.
To be displayed on. From tuning by the tuner 12 to signal processing by the intermediate frequency signal processing circuit 61, Y / C
It is a series of operations up to Y / C separation by the separation circuit 62. Then, it is checked whether the switching operation is completed. If the switching operation is completed, the still image mode in the cathode ray tube 119 is released. In this case, the display on the cathode ray tube 119 changes from a still image of the image data held in the memory 112 to a moving image of a new composite color video signal.

[0009]

However, compared to the current analog broadcasting, it takes a longer time for the video after channel switching to be established in digital broadcasting. On the other hand, there is a problem that a psychological burden is given due to the length of the channel switching time.

[0010]

In order to solve the above problems, a television receiver of the present invention holds an MPEG decoder for decoding digital data demodulated by a digital demodulator into image data, and image data. A memory and a controller for designating an address of the memory,
A still image processing unit that uses the still image data stored in the memory to create a plurality of images that are gradually smaller, and an image that is output by the MPEG decoder is used to increase the image. A moving image processing unit for producing a moving image, a switching unit for switching output data from the MPEG decoder and an image signal output from the still image processing unit according to an instruction from the controller, and output from the switching unit. A video signal processing circuit for converting a signal into an analog signal by a D / A converter, converting the analog signal into a video signal, and displaying the video signal on a cathode ray tube.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a television receiver for digital broadcasting which reduces the psychological burden on the user due to the length of the channel switching time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an MPEG decoder for decoding digital data demodulated by a digital demodulator into image data, a memory for holding the image data, and an address of the memory. A controller for designating, a still image processing unit that uses the still image data stored in the memory to generate a plurality of images that are gradually reduced, and the MPEG
A moving image processing unit that uses the output image data of the decoder to create an image that gradually increases in size;
Switching means for switching the output data from the PEG decoder and the image signal output from the still image processing section according to the instruction of the controller, and the signal output from the switching means is converted into an analog signal by a D / A converter. Then
It is a digital broadcasting television receiver equipped with a video signal processing circuit that converts the analog signal into a video signal and displays it on a cathode ray tube.When switching channels, the next channel is selected and the image is displayed. Before switching, the still image of the channel before switching gradually decreases on the screen, and the video of the new channel gradually increases after switching the channel. It has the effect of reducing the psychological burden on the user.

According to a second aspect of the present invention, a moving image creating section is provided for creating new several images using several image data stored in the memory, and the images are projected at the time of channel switching. The television receiver for digital broadcasting according to claim 1, characterized in that it has an effect of reducing the psychological burden on the user during the channel switching time of the user.

According to a third aspect of the present invention, a digital signal terminal is provided for inputting digital image data,
The television receiver for digital broadcasting according to claim 1, characterized in that the image is displayed when the channel is switched, and the action of reducing the psychological burden of the user during the channel switching time of the user. Have.

According to a fourth aspect of the present invention, by connecting a digital signal terminal to a memory, it is possible to take in and hold several still image data, and to display the image when switching channels. According to another aspect of the present invention, there is provided a television receiver for digital broadcasting as set forth in claim 1, which has an effect of reducing a user's psychological burden of a channel switching time of the user.

The invention according to claim 5 of the present invention is a television receiver for digital broadcasting, comprising an analog broadcasting receiving system, and configured to display an image thereof when switching channels. This has the effect of reducing the psychological burden on the user during the channel switching time.

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 11 is an antenna, 12 is a tuner circuit, 13 is a down converter, 14 is an A / D converter, 15 is a digital demodulator, 16 is an error corrector, 17
Is an MPEG decoder, 18 is a controller, 19 is a remote control transmitter, 110 is a key switch, 111 is a microcomputer, 112 is a memory, 113 is a moving image processing unit, 114 is a still image processing unit, 115 and 116 are switch circuits, 117 Is a D / A converter, 118 is a video processing signal circuit, and 119 is a cathode ray tube.

The operation of the digital broadcast television receiver configured as described above will be described with reference to FIG. In FIG. 1, the reception signal from the antenna 11 is supplied to the tuner circuit 12. The intermediate frequency signal is frequency-converted to a symbol frequency for digital processing by the down converter 13, supplied to the A / D converter 14, and converted into a digital signal there. Next, the digital signal is supplied to the digital demodulator 15, which performs detection, waveform shaping, clock reproduction, waveform equalization, carrier wave reproduction, AGC, AFC, phase noise suppression, code determination, etc., and outputs a decoded signal. Then, the error corrector 16 performs error correction on the transmission line, and the MPE
The G decoder 17 creates video data according to the MPEG standard and outputs it to the controller 18, the moving image processing unit 113, and the switch circuit 115.

In a state where the image switching is not performed, the controller 18 controls the switch circuit 115 so that the output of the MPEG decoder is directly connected to the D / A converter 117, and the D / A converter 11 passes through the switch circuit 116.
7 is supplied to the analog signal 7, is converted into an analog signal, is demodulated into R, G, B by the video signal processing circuit 118, and these three primary color signals R, G, B are supplied to the cathode ray tube 119, and an image is displayed. On the other hand, the operation of sequentially writing the image data from the MPEG decoder 17 into the addresses of the memory 112 designated by the controller 18 is also performed in parallel.

When a channel switching command for switching the channel of the television signal is input to the microcomputer 111 from the remote control transmitter 19 or the key switch 110, the microcomputer 111 outputs a control signal to the controller 18. . Then, the controller 18 stops writing the image data in the memory 112 based on the input control signal. As a result, the image data for the last one frame is stored in the memory 112. The controller 18 reads out this still image data and supplies it to the still image processing unit 114, where several still images are produced and the switch circuit 115 is created.
To supply. The several images that are gradually smaller here include, for example, several images in which a still image is fading in, but are not limited thereto.

Then, the controller 18 outputs a switch switching signal to the switch circuit 116 so that the image data of several images in which the still image is gradually reduced is supplied to the video signal processing circuit 118. . The image data is demodulated by the video signal processing circuit 118 as the three primary color signals R, G, B and supplied to the cathode ray tube 119 for display. Then, the switching operation is performed while the still images are displayed on the cathode ray tube 119 while several images are gradually reduced. This switching operation is to display an image of a television signal of a new desired channel on the cathode ray tube 119, and is a series of operations from the channel selection by the tuner 12 to the output of the MPEG decoder 17.

Then, it is checked whether the switching operation is completed. If the switching operation is completed, the controller 18 switches the switch circuits 115 and 116.
To the D / A converter 117, the image data of several images in which the moving image created by the moving image processing unit 113 gradually increases is switched to the D / A converter 117. The several images in which the moving image gradually increases are, for example, several images in which the moving image is in the fade-out operation, but are not limited thereto.

When the operation is completed, a control signal is sent from the controller 18 to the switch circuits 115 and 116 again, and the image data of the normal MPEG decoder 17 is D / A.
It is controlled so as to be connected to the converter 117. In the display of the cathode ray tube 119 in this case, the still image held in the memory 112 gradually becomes smaller and the new composite color video signal gradually becomes larger, and appears on the screen.

As described above, according to this embodiment, the antenna, the tuner circuit, the down converter, the A / D converter,
Digital demodulator, error corrector, MPEG decoder, controller, remote control transmitter, key switch, microcomputer, memory, moving image processing unit, still image processing unit,
A switch circuit, a D / A converter, a video processing signal circuit, and a cathode-ray tube are provided, and the still image of the channel before channel switching becomes gradually smaller at the time of channel switching, and a new composite color video signal gradually increases and appears on the screen. As a result, the psychological burden on the user for the length of the channel switching time can be reduced.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram of a digital broadcast television receiver showing a second embodiment of the present invention. In FIG. 2, 11
Is an antenna, 12 is a tuner circuit, 13 is a down converter, 14 is an A / D converter, 15 is a digital demodulator, 1
6 is an error corrector, 17 is an MPEG decoder, 18 is a controller, 19 is a remote control transmitter, 110 is a key switch, 111 is a microcomputer, 116 is a switch circuit, 117 is a D / A converter, and 118 is a video processing signal circuit. 119 is a cathode ray tube, and the above is the same as the configuration of FIG. The difference from the configuration of FIG. 1 is that the still image processing unit 114 is replaced with a moving image creating unit, the moving image processing unit 113 and the switch circuit 115 are removed, and the output of the MPEG decoder is directly supplied to the switch circuit 116. is there.

If channel switching is not performed,
By the same operation as in claim 1, a signal is received by the antenna 11 and an image of a desired channel is displayed on the cathode ray tube 119. Then, the image data is written in the memory 112, but the difference from claim 1 is that the moving image data for several sheets is always stored.

Then, when a channel switching command for switching the channel of the television signal is input to the microcomputer 111 from the remote control transmitter 19 or the key switch 110, the controller 18 operates in the same manner as in claim 1. Several pieces of moving image data are read out from the memory 112 and supplied to the moving image creation unit 21, where several tens of images for filling the channel switching time are created and supplied to the switch circuit 115.
Examples of the dozens of images for filling the channel switching time include, but are not limited to, an image performing a slow motion operation, an image performing a rewind operation, and the like.

Then, by the same operation as in claim 1,
Dozens of images for filling the channel switching time are supplied to the cathode ray tube 119 and displayed. Then, it is checked whether the switching operation is completed. When the switching operation is completed, the controller 18 switches the switch circuit 116.
The image data of the desired channel output from the MPEG decoder 17 is supplied to the switch circuit 116, passes through the D / A converter 117 and the video signal processing circuit 118, and enters the circuit cathode ray tube 119. It is projected. In this case, the display on the cathode ray tube 119 changes from a few tens of images that fill the channel switching time created from the image data held in the memory 112 to a moving image of a new composite color video signal.

As described above, a moving image forming unit is provided, and a new composite color video signal moving image is created from several tens of images for filling the channel switching time formed by the moving image forming unit on the CRT when switching channels. By changing to, it is possible to reduce the psychological burden on the user for the length of the channel switching time.

(Third Embodiment) A third embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a diagram of a television receiver for digital broadcasting showing a third embodiment of the present invention. In FIG. 3, 11
Is an antenna, 12 is a tuner circuit, 13 is a down converter, 14 is an A / D converter, 15 is a digital demodulator, 1
6 is an error corrector, 17 is an MPEG decoder, 18 is a controller, 19 is a remote control transmitter, 110 is a key switch, 111 is a microcomputer, 116 is a switch circuit, 117 is a D / A converter, and 118 is a video processing signal circuit. 119 is a cathode ray tube, and the above is the same as the configuration of FIG. The difference from the configuration of FIG.
Is that the digital signal terminal 31 is connected to the switch circuit 116 through the controller 18. When channel switching is not performed, a signal is received by the antenna 11 and an image of a desired channel is displayed on the cathode ray tube 1 by the same operation as in the example shown in the second embodiment.
It is projected on 19.

When a channel switching command for switching the channel of the television signal is input to the microcomputer 111 from the remote control transmitter 19 or the key switch 110, the controller 18
Supplies the image data sent from the digital signal terminal to the switch circuit 115. The image data sent from the digital signal terminal may be, for example, image data of various services sent from a telephone line, a personal computer communication line, or the like, but is not limited thereto. Then, the image data sent from the digital signal terminal is supplied to the cathode ray tube 119 and displayed by the same operation as in the example of the first embodiment.

Then, it is checked whether the switching operation is completed. When the switching operation is completed, the controller 1
8 sends a control signal to the switch circuit 116, and the MPE
The image data of the desired channel output from the G decoder 17 is supplied to the switch circuit 116, and the D / A
It passes through the converter 117 and the video signal processing circuit 118, and is displayed on the circuit cathode ray tube 119. In this case, the display on the cathode ray tube 119 changes from an image sent from the digital signal terminal to a moving image of a new composite color video signal.

As described above, the digital signal terminal is provided,
When the channel is switched, the image sent from the digital signal terminal on the CRT is changed to the moving image of the new composite color video signal, so that the user's psychological burden on the length of the channel switching time can be reduced.

(Fourth Embodiment) A fourth embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a diagram of a television receiver for digital broadcasting showing a fourth embodiment of the present invention. In FIG. 4, 11
Is an antenna, 12 is a tuner circuit, 13 is a down converter, 14 is an A / D converter, 15 is a digital demodulator, 1
6 is an error corrector, 17 is an MPEG decoder, 18 is a controller, 19 is a remote control transmitter, 110 is a key switch, 111 is a microcomputer, 116 is a switch circuit, 117 is a D / A converter, and 118 is a video processing signal circuit. 119 is a cathode ray tube, 31 is a digital signal terminal,
The above is the same as the configuration of FIG. The difference from the configuration of FIG. 3 is that the memory 112 and the digital signal terminal 31 are connected. When the channel is not switched, the antenna 11 is operated by the same operation as in claim 2.
The signal is received at, and the image of the desired channel is displayed on the cathode ray tube 119.

Then, when a channel switching command for switching the channel of the television signal is input to the microcomputer 111 from the remote control transmitter 19 or the key switch 110, the controller 18
Supplies the image data in the memory 112, which holds the image data sent from the digital signal terminal in advance, to the switch circuit 115. The image data sent from the digital signal terminal in advance here may be, for example, image data of various services sent from a telephone line or a personal computer communication line, a commercial image, etc., but is not limited thereto. Not something. Then, by the same operation as in claim 1, the image data sent from the digital signal terminal is supplied to the cathode ray tube 119 and displayed.

Then, it is checked whether the switching operation is completed, and when the switching operation is completed, the controller 1
8 sends a control signal to the switch circuit 116, and the MPE
The image data of the desired channel output from the G decoder 17 is supplied to the switch circuit 116, and the D / A
It passes through the converter 117 and the video signal processing circuit 118, and is displayed on the circuit cathode ray tube 119. In this case, the display on the cathode ray tube 119 changes from an image sent from the digital signal terminal in advance to a moving image of a new composite color video signal.

As described above, by connecting the digital signal terminal and the memory, the image sent from the digital signal terminal in advance on the CRT at the time of channel switching is changed to a moving image of a new composite color video signal. , It is possible to reduce the psychological burden on the user for the length of channel switching time.

(Fifth Embodiment) Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings.

FIG. 5 is a diagram of a digital broadcast television receiver showing a fifth embodiment of the present invention. In FIG. 5, 11
Is an antenna, 12 is a tuner circuit, 13 is a down converter, 14 is an A / D converter, 15 is a digital demodulator, 1
6 is an error corrector, 17 is an MPEG decoder, 18 is a controller, 19 is a remote control transmitter, 110 is a key switch, 111 is a microcomputer, 116 is a switch circuit, 117 is a D / A converter, and 118 is a video processing signal circuit. 119 is a cathode ray tube, and the above is the same as the configuration of FIG. The difference from the configuration of FIG.
The analog broadcast receiver 52 is connected to the switch circuit 116 via the controller 18, and the configurations of the switch circuit 116 and the D / A converter 117 are different in connection therewith. When channel switching is not performed, the same operation as in the example shown in the second embodiment is performed.
The signal is received by the antenna 11, and an image of a desired channel is displayed on the cathode ray tube 119.

When a channel switching command for switching the channel of the television signal is input to the microcomputer 111 from the remote control transmitter 19 or the key switch 110, the controller 18
The analog broadcast receiver 52 converts the signal received by the antenna 51 into an image signal, and supplies the image signal to the switch circuit 115. Analog broadcast receiver 52 here
Examples of the image received by are, for example, a normal NTSC image and a teletext, but are not limited thereto. Then, by the same operation as in claim 1,
The image received by the analog broadcast receiver 52 is a cathode ray tube 1.
19 is supplied and displayed.

Then, it is checked whether the switching operation is completed. When the switching operation is completed, the controller 1
8 sends a control signal to the switch circuit 116, and the MPE
The image data of the desired channel output from the G decoder 17 is supplied to the D / A converter 117, passes through the switch circuit 116 and the video signal processing circuit 118, and is displayed on the circuit Braun tube 119. In this case, the display of the cathode ray tube 119 is changed to a moving image of a new composite color video signal by displaying the image received by the analog receiver at the time of channel switching.

As described above, by providing an analog broadcast receiver and an antenna and changing the image received by the analog receiver on the CRT at the time of channel switching to a moving image of a new composite color video signal, the channel switching time is reduced. It is possible to reduce the psychological burden of the user on the length.

[0047]

As described above, according to the present invention, the antenna, the tuner, the down converter for converting the frequency of the intermediate frequency signal to the symbol frequency for digital processing, the A / D conversion circuit, the detection, the waveform shaping, and the clock reproduction. , Waveform equalization,
A digital demodulator that produces a decoded signal by performing carrier wave reproduction, AGC, AFC, phase noise suppression, code judgment, etc., an error corrector that corrects errors in the transmission path, and digital data that conforms to the transmitted MPEG standard is converted into image data. MPEG decoder for decoding to a remote controller, remote control transmitter, key switch, microcomputer that receives a channel switching command from the remote control transmitter or key switch and transmits the command to the tuner or controller, and specifies memory address and switch circuit A controller for controlling the image data, a memory for holding the image data, a still image processing unit for producing a number of still images using the still image data stored in the memory, and an MPEG decoder. Image is gradually enlarged using the output image data of A moving image processing unit that creates several images, a switch circuit that switches output data from the MPEG decoder and an image output from the still image processing unit, a D / A converter, and a D / A converter By providing a video signal processing circuit that performs the operation of converting the output signal of to a video signal signal and displaying it on a cathode ray tube, and a cathode ray tube that displays an image, by the time the channel is switched, the next channel is selected and the image is displayed. The still image of the channel before switching performs an operation that gives the user the impression that the image switching is smooth on the screen, and after the channel switching, the moving image of the new channel gives the user the impression that the image switching is smooth. By doing the operation and filling the gap between channel switching, In which the excellent digital broadcast television receiver can be achieved it is possible to reduce the psychological burden of the user.

[Brief description of the drawings]

FIG. 1 is a block diagram of a digital broadcast television receiver according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a digital broadcast television receiver according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a digital broadcast television receiver according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a digital broadcast television receiver according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a television receiver for digital broadcasting according to a fifth embodiment of the present invention.

FIG. 6 is a block diagram of a conventional television receiver.

[Explanation of symbols]

 11 antenna 12 tuner 13 down converter 14 A / D converter 15 digital demodulator 16 error corrector 17 MPEG decoder 18 controller 19 remote control transmitter 110 key switch 111 microcomputer 112 memory 113 moving image processing unit 114 still image processing unit 115 switch Circuits 116 Switch circuits 117 D / A converters 118 Video signal processing circuits 119 CRTs 21 Moving image creation parts 31 Digital signal terminals 51 Antennas 52 Analog broadcast receivers 61 Intermediate frequency signal processing circuits 62 Y / C separation circuits

Claims (5)

[Claims] 1. An MPEG decoder for decoding digital data demodulated by a digital demodulator into image data, a memory for holding the image data, a controller for designating an address of the memory, and a static memory stored in the memory. A still image processing unit that uses image data to generate a plurality of images that gradually decrease, and a moving image process that uses the output image data of the MPEG decoder to generate an image that gradually increases. Section, switching means for switching output data from the MPEG decoder and the image signal output from the still image processing section according to an instruction from the controller, and a signal output from the switching means by a D / A converter. Convert it to an analog signal, then convert the analog signal to a video signal and project it on a cathode ray tube. A television receiver for digital broadcasting, which is provided with a video signal processing circuit for performing the above operation. 2. A moving image creating unit for creating new several images using several image data held in a memory, and is configured to project the images when switching channels. The television receiver for digital broadcasting according to claim 1. 3. The television receiver for digital broadcasting according to claim 1, further comprising a digital signal terminal for inputting digital image data, and displaying the image when switching channels. . 4. The digital signal terminal is connected to a memory so that a plurality of still image data can be taken in and held, and the image is displayed at the time of channel switching. The television receiver for digital broadcasting according to item 1. 5. The television receiver for digital broadcasting according to claim 1, further comprising an analog broadcasting receiving system, which is configured to display an image thereof when switching channels.