JP2002320153A - Tuning method and tuning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a channel selection method and a unit, through which a digital broadcast receiver is capable of carrying out channel selection accompanied by images, at a high speed. SOLUTION: A tuner B116 which receives digital broadcast signals at all times is prepared besides a tuner A102, which is used for usual channel selection and viewing channels, the static images of channels which can be received are stored in a storage 106, corresponding to their channel numbers; and when high-speed sequential channel selection is carried out, the stored static images and the corresponding channel numbers which are displayed in OSD are displayed, while they are made to be in one-to-one correspondence between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning method and a tuning device, and more particularly to a tuning method and a tuning device capable of performing high-speed tuning with an image in a digital broadcast receiver.

[0002]

2. Description of the Related Art In recent years, digital signal processing technology for video and audio has been remarkably advanced, and with this, in the field of broadcasting, digital broadcasting that can broadcast many programs using multiple channels in various countries around the world has started. Have been.

[0003] In digital broadcasting, an electronic program guide (Electronic Program Guide) is provided to allow a user to easily select a desired program from a large number of programs.
e) is prepared. The electronic program guide is superimposed on a digital broadcast signal and transmitted (SI (Service I)).
ninformation), and includes program data for the next week on all channels.
The user can use the electronic program guide as an auxiliary means necessary for selecting a program, such as selecting a desired program or making a program reservation.

As a channel selection method performed by the user, in addition to the method of selecting a program using the above-described electronic program guide, a method of directly inputting a desired channel using a numeric keypad, a channel up key, or a channel up key. There is a sequential channel selection method for sequentially selecting channels preset by a down key and selecting a desired channel.

[0005] In digital broadcasting, users mainly select programs using an electronic program guide, but there is still a high demand for sequential channel selection while watching images of the currently selected channel. . On the other hand, in view of the current situation in which programs are multi-channeled, sequential channel selection at a higher speed than in the past is required.

Here, the sequential channel selection operation will be described with reference to a block diagram of a conventional channel selection device of a digital broadcast receiver shown in FIG.

When the system controller 705 determines that tuning has been performed sequentially from the remote control signal from the remote control light receiver 715, it issues a tuning start command to the tuner 702 based on the tuning information stored in the storage unit 706. .

The tuner 702 receives a tuning start command from the system controller 705, and
01, a digital broadcast signal is received. Then, high-frequency processing and demodulation processing are performed on the received digital broadcast signal, and a DEMUX circuit 7 is provided as a transport stream.
03 is output.

The DEMUX circuit 703 includes a tuner 702
, The transport stream is classified into digital video and audio signals and additional information, the digital video and audio signals are output to the decoder 704, and the additional information is output to the system controller 705.

The additional information output to system controller 705 is stored in storage unit 706. Further, the system controller 705 extracts a channel number from the additional information and displays the channel number on the OSD display circuit 7.
12 is output.

On the other hand, the digital video signal and audio signal output to the decoder 704 are converted into analog signals. Then, the analog video signal is output to the video processing circuit 710, and the analog audio signal is output to the audio processing circuit 707.

The analog audio signal output to the audio processing circuit 707 is transmitted through the audio output circuit 708 to the audio output device 7.
09 is output. Further, the analog video signal output to the video processing circuit 710 is combined with the OSD display data from the OSD display circuit 712 by the video combining circuit 711, and then the video output device 714 via the video output circuit 713.
Output to

In the sequential channel selection, while the channel up key or the channel down key is kept depressed, the above channel selection operation is repeated for each channel, and an image and a sound corresponding to the selected channel are output almost instantaneously. Like that.

However, when the number of channels is increased, channel selection is performed one channel at a time, and the desired channel is selected while viewing the image and sound of each channel. Is too inconvenient.

Therefore, as in a television receiver disclosed in Japanese Patent No. 2924610, in channel selection in which a channel up key or a channel down key is kept pressed, a channel selection operation by switching channels is not performed. High-speed channel selection method that displays only the channel number at high speed, starts the channel selection operation at the timing when the channel up key or channel down key is released, and outputs the image and sound corresponding to the selected channel. Has been proposed.

[0016]

However, in the above-mentioned conventional television receiver, picture mute is applied to the screen while high-speed channel selection is being performed.
The image corresponding to the channel number displayed in SD was not output. This is because, at the time of high-speed channel selection, the tuner remains in a state where the digital broadcast immediately before the shift to high-speed channel selection is received, and the displayed channel number and image are not consistent.

That is, in digital broadcasting, a tuner is required to project an image despite the high demand of the user for successively selecting a channel by successively switching channels while checking broadcast contents and searching for a desired channel. Due to the configuration of the digital broadcast receiver that requires signal processing such as decoding after the operation, it was not possible to perform high-speed sequential channel selection.

The present invention has been made in view of the above circumstances, and in addition to a tuner used for normal channel selection viewing, a second tuner is prepared, and a still image of a channel receivable by the second tuner is prepared in advance. A channel selection method and a channel selection method for realizing high-speed channel selection with images by displaying the stored still images in association with a channel number to be displayed on the OSD during high-speed sequential channel selection. It is intended to provide a station device.

[0019]

According to a first aspect of the present invention, there is provided a channel selection method for performing high-speed sequential channel selection using a second tuner different from the first tuner used for ordinary channel selection viewing. In the station method, a first step of constantly receiving digital broadcast using a second tuner, a second step of extracting still image data from the digital broadcast signal received in the first step, and a second step of A third step of creating and storing high-speed sequential channel selection program information in a table format from the still images extracted in the step and the corresponding channel numbers; The fourth step is to obtain a channel number and data of a still image corresponding to the channel number from the corresponding channel number, and to continuously display the screen on which the channel number and the still image are superimposed by changing the channel number. When a channel selection request is issued, the channel number of the channel displayed on the screen at the time of the channel selection request is acquired from the high-speed sequential channel selection program information, and the fifth tuner is started using the first tuner. Having the following steps.

According to a second aspect of the present invention, there is provided a channel selection method according to the first aspect, wherein the still image includes an MP
It is characterized by using an I picture of a digital video signal compressed by EG2.

According to a third aspect of the present invention, there is provided a channel selection method according to the first or second aspect, wherein a high-speed sequential channel selection request is performed by continuously pressing a channel up key or a channel down key. A channel selection request is made by releasing an up key or a channel down key.

Also, the tuning apparatus according to a fourth aspect of the present invention includes a first tuner used for normal channel viewing and listening, a second tuner for constantly receiving digital broadcasts, and a digital tuner from the second tuner. A still image extracting means for extracting a still image from a video signal, a control means for creating table format high-speed sequential channel selection program information from a still image from the still image extracting means and a corresponding channel number, and a high-speed sequential program information from the control means A storage unit for storing channel selection program information; and a display unit for displaying a screen on which a channel number and a still image are superimposed. When there is a high-speed sequential channel selection request, the control unit stores the channel number in the storage unit. The channel number and the still image data corresponding to the channel number are acquired from the high-speed sequential channel selection program information, and the display on which the channel number and the still image are superimposed is displayed on the display means. Continuously performed by changing the number, and fast turn when there is a channel selection request during tuning, obtains the channel number of the channel that was displayed on the screen from the high-speed sequential channel selection program information during a channel selection request, the first
Is started by the tuner.

According to a fifth aspect of the present invention, in the channel selecting apparatus according to the fourth aspect, an I picture of a digital video signal compressed by MPEG2 is used as a still image. Is what you do.

According to a sixth aspect of the present invention, in the channel selecting apparatus according to the fourth or fifth aspect, when the channel up key or the channel down key is continuously depressed, the control means operates at a high speed. It is characterized in that it is sequentially detected that a channel selection request has been made, and when a channel up key or a channel down key is released, it is detected that a channel selection request has been made.

A recording medium according to a seventh aspect of the present invention stores a computer program for implementing the tuning method of the first aspect, and a program according to an eighth aspect of the present invention stores the computer program. It is about itself.

Therefore, according to the present invention, at the time of high-speed sequential channel selection, the channel numbers and still images of the high-speed sequential channel selection program information are successively projected, and when the channel displayed by the above processing is selected. By starting the tuning process for the first time, high-speed tuning with an image can be performed.

[0027]

FIG. 1 is a block diagram showing a configuration of a channel selection device of a digital broadcast receiver according to an embodiment of the present invention.

The tuner includes a tuner A102, a tuner B116, a DEMUX circuit A103, a DEMUX circuit B
117, a decoder 104, a still image extraction unit 118, a system controller 105, a storage unit 106, a remote control light receiver 115, an audio processing circuit 107, an audio output circuit 108,
Audio output device 109, video processing circuit 110, video synthesis circuit 111, OSD display circuit 112, video output circuit 113
And a video output device 114.
Is connected to In the case of sequential tuning, tuner A10
2 is selected while checking the contents of the program being broadcast, and in the case of high-speed sequential tuning, the tuner B116 constantly selects and displays still images acquired and accumulated.

The high-speed sequential channel selection includes an ascending channel selection requesting channel up and a descending channel selection requesting channel down. In the present embodiment, an operation of keeping the channel up key or the channel down key of the remote controller, which is one of the conventional sequential tuning operations, realized as a high-speed sequential tuning operation.

A tuner A102 is a tuner used for normal channel selection and viewing, and has preset frequency data corresponding to a channel number. Then, high-frequency processing and demodulation processing are performed on the digital broadcast signal received via the antenna 101, and the digital broadcast signal is output as a transport stream to the DEMUX circuit A103.

A tuner B116 is a tuner used for high-speed sequential channel selection, and presets data of a frequency corresponding to a channel number. And the digital broadcast signal is always received via the antenna 101,
High-frequency processing and demodulation processing are performed on the received digital broadcast signal, and the resultant signal is output to the DEMUX circuit B117 as a transport stream.

The DEMUX circuit A103 includes a tuner A1.
02 is divided into digital video signals and audio signals as MPEG data and tuning information and program information as additional information, MPEG data is output to the decoder 104, and additional information is output to the system controller 105. I do.

The DEMUX circuit B117 is a tuner B1.
The transport stream from 16 is classified into digital video signals and audio signals as MPEG data and tuning information and program information as additional information, and the MPEG data is output to the still image extracting unit 118.

The decoder 104 has a DEMUX circuit A10
3 from the MPEG data. And
An analog video signal is output to the video processing circuit 110, and an analog audio signal is output to the audio processing circuit 107.

The still image extracting section 118 extracts a still image from the digital video signal from the DEMUX circuit B 117 and outputs the still image to the system controller 105.

The system controller 105 issues a tuning start command to the tuner A 102 and the tuner B 116. Further, based on the additional information from the storage unit 106 and the still image from the still image extraction unit 118, high-speed sequential channel selection program information to be described later is created. Further, at the time of sequential channel selection or high-speed sequential channel selection, a channel number is extracted from additional information from the DEMUX circuit A103 or high-speed sequential channel selection program information from the storage unit 106, and the OSD display circuit 112
Output to

The storage unit 106 stores the system controller 1
05 and high-speed sequential channel selection program information. The audio processing circuit 107 adjusts the balance, sound quality, and the like of the analog audio signal from the decoder 104 and outputs the signal to the audio output circuit 108. The audio output circuit 108 amplifies the analog audio signal from the audio processing circuit 107 and outputs it to the audio output device 109. The audio output device 109 is an output device such as a speaker, and externally outputs an analog audio signal from the audio output circuit 108.

The video processing circuit 110 adjusts the brightness, contrast, etc., of the analog video signal from the decoder 104 and outputs it to the video synthesis circuit 111 as analog video data. The video synthesizing circuit 111 includes a video processing circuit 110
And the OSD display data from the OSD display circuit 112 are synthesized and output to the video output circuit 113 as an analog video signal. OSD display circuit 11
2 outputs the channel number acquired from the system controller 105 to the video compositing circuit 111 as OSD display data in order to display the channel number superimposed on the video displayed on the screen of the video output device 114. The video output circuit 113 adjusts the analog video signal from the video synthesizing circuit 111 such as resolution conversion and outputs the analog video signal to the video output device 114. The video output device 114 is a display device such as a cathode ray tube display, a liquid crystal display, or a plasma display, and outputs an analog video signal from the video output circuit 113 to a screen. The remote control receiver 115 receives a remote control signal from a user and sends the signal to the system controller 105.
Output to

In this embodiment, the tuner A102 corresponds to the first tuner described in the claims, and the tuner B116 similarly includes the second tuner and the DEMUX circuit B11.
7 and the still image extraction unit 118 are still image extraction means, the system controller 105 is control means, the storage unit 106 is storage means, the decoder 104, the video processing circuit 110, the video synthesis circuit 111, the OSD display circuit 112, and the video output circuit 1.
13 and the video output device 114 correspond to display means.

Here, a still image displayed on the screen at the time of high-speed sequential channel selection will be described with reference to a configuration diagram of a digital video signal compressed by MPEG2 shown in FIG.

The digital video signals are transmitted from GOP1 to GOP.
n or more GOPs (Groupof Pictur)
es). The GOP is composed of a group of pictures corresponding to one frame (still picture) constituting a moving image signal. Specifically, one GOP (Intra coded picture) and a plurality of P pictures (Predictive coded) are provided. pi
structure) and a plurality of B pictures (Birect)
ionicly coded picture).

An I picture is a frame obtained by encoding an input signal as it is. The P picture is a frame obtained by performing predictive coding from an image located in the past in time. A B picture is a frame obtained by prediction from both past and future images.

When high-speed sequential channel selection is performed, P-pictures and B-pictures using frame information before and after on the time axis cannot be used because the correlation between the previous and next frames is broken. On the other hand, since an I picture encodes only its own frame without using other frame information, a still image of a video signal can be constituted only by the I picture.

Therefore, in the present embodiment, the still image extracting section 118 extracts the latest GOP from the digital video signal.
The I picture 201 of GOPn is extracted as a still image of the program being broadcast.

In the present embodiment, the I-picture of the latest GOP is used as a still image, but an I-picture corresponding to the start screen of a program currently being broadcast may be used as a still image.

Next, the high-speed sequential channel selection program information created by the system controller 105 will be described with reference to FIG.

The high-speed sequential channel selection program information is obtained by associating the channel number included in the additional information from the storage unit 106 with the I picture 201 from the still image extraction unit 118, and is created by the system controller 105. After that, the data is stored in the storage unit 106 in the table format shown in FIG.

Next, a procedure for creating high-speed sequential channel selection program information will be described with reference to the flowchart shown in FIG.

First, the system controller 105 obtains all the channel numbers on which digital broadcasting is currently being performed from the additional information from the storage unit 106, and based on the obtained channel numbers, the high-speed sequential channel selection program shown in FIG. Information is created, and the created high-speed sequential channel selection program information is stored in the storage unit 106 (S401). At this time, there is no I picture corresponding to the channel number.

Next, the system controller 105 acquires the channel number "141" of the number "1" from the high-speed sequential channel selection program information in the storage unit 106 (S40).
2) Based on the acquired channel number “141”, a tuning start command is issued to the tuner B116 to receive a digital broadcast signal (S403). As a result, the still image extraction unit 118 outputs the digital video from the DEMUX circuit B117. I picture "Pic_1" extracted from the signal
Is acquired (S404). Then, the acquired I picture "Pic_1" is stored in the high-speed sequential channel selection program information in the storage unit 106 in association with the channel number (S
405).

The system controller 105 sets the channel number “m” of the number “n” of the high-speed sequential channel selection program information.
Until an I picture corresponding to (N
o "), the process from step S403 onward for the next channel number (S407) is repeated. After acquiring the I picture "Pic_n" of the channel number "m" of the number "n" and storing the acquired I picture "Pic_n" in the high-speed sequential channel selection program information ("Yes" in S406), Again, the processing after step S402 for the channel number "141" of the number "1" is repeated.

As described above, the system controller 105
Has continuously performed the high-speed sequential channel selection program information creation processing in order to acquire or update still images of all channels on which digital broadcasting is being performed. The update interval of the high-speed sequential channel selection program information depends on the number of channels on which digital broadcasting is being performed, and the smaller the number of channels, the shorter the update time.

Next, a processing procedure at the time of receiving a high-speed sequential channel selection request will be described with reference to a flowchart shown in FIG.
Here, the high-speed sequential channel selection request is performed by continuously pressing the channel up key or the channel down key of the remote controller. Further, the system controller 105
It has a COUNT which is a counter for high-speed sequential channel selection operation in advance. The COUNT value is an initial value (COUNT value = 0) until the first high-speed sequential channel selection request is received.

The system controller 105 decodes the remote control signal from the remote control light receiver 115 and, when judging that the high-speed sequential channel selection request has been received (S501), starts the following processing.

If the COUNT value is the initial value, that is, if it is the first high-speed sequential channel selection request ("initial value" in S502), the high-speed sequential channel selection program information is obtained from the storage unit 106 (S503). ), A number is acquired from the high-speed sequential channel selection program information using the currently selected channel number as an argument (S504). Then, the acquired number is set as a COUNT value (S505).

On the other hand, if the COUNT value is not the initial value,
That is, if the request is a continuous high-speed sequential channel selection request (S50
2 "not initial value"), the CO
The output of the UNTth channel number to the OSD display circuit 112 and the output of the I picture to the decoder 104 are performed (S506).

The OSD display circuit 112 outputs the channel number from the system controller 105 to the video synthesizing circuit 111 as OSD display data. Decoder 104
Converts the I picture from the system controller 105 into an analog signal, and converts it into an analog video signal.
Output to 10 The analog video signal is synthesized with the OSD display data from the OSD display circuit 112 by the video synthesis circuit 111, and then output to the video output device 114 via the video output circuit 113.

After the above processing, it is determined whether the received high-speed sequential channel selection request is an ascending channel selection or a descending channel selection (S507). If the channel is in ascending order ("is ascending channel in S507"), C
The OUNT value is incremented (S508). Then, the COUNT value is compared with the total number of channels, and
If the NT value is equal to or less than the total number of channels ("is less than or equal to" in S509), the state returns to a state where a high-speed sequential channel selection request can be received. If the COUNT value is not equal to or less than the total number of channels ("not equal to or less than" in S509), the COUNT value is set to 1 (S510), and returns to a state where a high-speed sequential channel selection request can be received.

On the other hand, if the channel selection is a descending channel selection ("not ascending channel selection" in S507), the COUNT value is decremented (S511). Then, if the COUNT value is a natural number ("natural number" in S512), the state returns to a state in which a high-speed sequential channel selection request can be received. If the COUNT value is not a natural number ("not a natural number" in S512), COU
The total number of channels is set in NT (S513), and the state returns to a state in which a high-speed sequential channel selection request can be received.

By the above operation, while the high-speed sequential channel selection is being performed, the channel numbers and the still images corresponding to the channel numbers are successively displayed on the video output device 114. However, when a channel having no still image corresponding to the channel number is selected, that is, when a channel for which still image acquisition has not been performed is selected, only the channel number is OSD-displayed on the video output device 114. . Alternatively, in the above case, the still image set in advance by the viewer on the menu screen or the like may be displayed on the video output device 114 while being superimposed on the channel number for OSD display.

The channel selection screen is about 1 in the conventional sequential channel selection.
Although switching is performed at intervals of seconds, switching can be performed at intervals of approximately 0.4 seconds in the high-speed sequential channel selection of the present invention.
The switching interval in the high-speed sequential channel selection can be shortened within a range that can be recognized by a viewer.

Note that the tuner B1 is also used during the high-speed sequential channel selection operation.
At 16, a digital broadcast signal is received, and the process of generating high-speed sequential channel selection program information shown in FIG. 4 is continuously performed.

Finally, the system controller 105
A processing procedure when a channel selection request is received during high-speed sequential channel selection will be described with reference to the flowchart shown in FIG. Here, the channel selection request is issued when the user performs a high-speed sequential channel selection by continuously pressing the channel up key or the channel down key.
Is performed by confirming the channel numbers sequentially displayed on the screen and releasing the channel up key or the channel down key at a predetermined channel number.

When receiving the channel selection request (S601), the system controller 105 tunes to the tuner A102 based on the channel number of the COUNT-th high-speed sequential channel selection program information corresponding to the COUNT value at the time of receiving the channel selection request. Issue a start command (S60
2). Then, the COUNT value is set to the initial value, the high-speed sequential channel selection processing ends (S603), and the processing shifts to a normal channel selection processing using the tuner A102.

In this embodiment, while the high-speed sequential channel selection is being performed, the tuner A102 keeps selecting the channel immediately before shifting to the high-speed sequential channel selection. The processing up to the reception of the digital broadcast signal of the channel selected by the high-speed sequential channel selection may be performed. As a result, the transition to the normal channel selection processing after receiving the channel selection request is faster than in the case where the above processing is not performed.

In this embodiment, the high-speed sequential channel selection request and the channel selection request are performed by operating the channel up key or the channel down key of the remote controller. A channel down key and a channel selection key may be separately prepared to perform a high-speed sequential request and a channel selection request.

In this embodiment, high-speed sequential channel selection processing is performed by two tuners. However, the same applies to a configuration in which a plurality of tuners are prepared and one or more tuners constantly acquire program information. The effect is obtained. Further, a similar effect can be obtained even when a digital broadcast is received via the Internet.

Although the present embodiment is realized by controlling each means by a computer program, by storing this computer program on a recording medium such as a floppy (registered trademark) disk, It can also be implemented in other independent digital broadcast receivers.

[0069]

As described above, according to the present invention,
Always acquire and accumulate still images on receivable channels,
By displaying the stored still images in association with the channel number for OSD display during high-speed sequential channel selection,
It is possible to simulate high-speed tuning with an image.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a channel selection device of a digital broadcast receiver according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a digital video signal compressed by MPEG2 of the embodiment.

FIG. 3 is a diagram showing high-speed sequential channel selection program information according to the embodiment;

FIG. 4 is a flowchart showing a procedure for creating high-speed sequential channel selection program information according to the embodiment;

FIG. 5 is a flowchart showing a processing procedure when a high-speed sequential tuning request according to the embodiment is received;

FIG. 6 is a flowchart showing a processing procedure when a channel selection request according to the embodiment is received;

FIG. 7 is a block diagram showing a configuration of a conventional channel selection device of a digital broadcast receiver.

[Explanation of symbols]

 101, 701 Antenna 102 Tuner A 103 DEMUX circuit A 104, 704 Decoder 105, 705 System controller 106, 706 Storage unit 107, 707 Audio processing circuit 108, 708 Audio output circuit 109, 709 Audio output device 110, 710 Video processing circuit 111 , 711 Video synthesis circuit 112, 712 OSD display circuit 113, 713 Video output circuit 114, 714 Video output device 115, 715 Remote control light receiver 116 Tuner B 117 DEMUX circuit B 118 Still image extraction unit 201 I picture 702 Tuner 703 DEMUX circuit

Continuation of the front page F term (reference) 5C025 AA23 CA09 CB05 CB08 DA01 5J103 AA11 BA03 CB05 DA00 JA09 LA22 5K061 AA00 BB07 DD12 GG09 JJ06 JJ07

Claims (8)

[Claims] 1. A channel selection method for performing high-speed sequential channel selection using a second tuner different from the first tuner used for normal channel selection viewing, wherein a digital broadcast is always received using the second tuner. A first step of extracting a still image data from the digital broadcast signal received in the first step, and a channel number corresponding to the still image extracted in the second step. A third step of creating and storing high-speed sequential channel selection program information in the form of a table; and, when a high-speed sequential channel selection request is issued, a channel number and a still image corresponding to the channel number from the high-speed sequential channel selection program information. There is a fourth step in which data is acquired and a screen display in which a channel number and a still image are superimposed is continuously performed by changing the channel number, and there is a channel selection request. A fifth step of acquiring the channel number of the channel displayed on the screen at the time of the channel selection request from the high-speed sequential channel selection program information, and starting channel selection using the first tuner. Channel selection method. 2. The channel selection method according to claim 1, wherein an I picture of a digital video signal compressed by MPEG2 is used as a still image. 3. A high-speed sequential channel selection request is made by continuously pressing a channel up key or a channel down key, and a channel selection request is made by releasing the channel up key or the channel down key.
Or the channel selection method described in 2. 4. A first tuner used for normal channel selection and viewing, a second tuner for constantly receiving digital broadcasting, and a still image extracting means for extracting a still image from a digital video signal from the second tuner. Control means for creating table-type high-speed sequentially selected program information from the still image from the still image extraction means and the corresponding channel number; and storage means for storing high-speed sequentially selected program information from the control means. Display means for displaying a screen in which a channel number and a still image are superimposed, wherein the control means, when a high-speed sequential channel selection request is made, reads a channel from the high-speed sequential channel selection program information stored in the storage means. The number and the still image data corresponding to the channel number are acquired, and the display in which the channel number and the still image are superimposed on the display means is connected by changing the channel number. When a channel selection request is made during high-speed sequential channel selection, the channel number of the channel displayed on the screen at the time of the channel selection request is acquired from the high-speed sequential channel selection program information, and the first tuner is obtained. A channel selection device for starting the channel selection. 5. The channel selection apparatus according to claim 4, wherein an I picture of a digital video signal compressed by MPEG2 is used as a still image. 6. The control means detects that a high-speed sequential channel selection request has been made when the channel up key or the channel down key is kept pressed, and when the channel up key or the channel down key is released. 6. The channel selection device according to claim 4, wherein the channel selection device detects that a channel selection request has been made. 7. A channel selection method for performing high-speed sequential channel selection using a second tuner different from the first tuner used for normal channel viewing and listening, wherein a digital broadcast is always received using the second tuner. A first step of extracting a still image data from the digital broadcast signal received in the first step, and a channel number corresponding to the still image extracted in the second step. A third step of creating and storing high-speed sequential channel selection program information in the form of a table; and, when a high-speed sequential channel selection request is issued, a channel number and a still image corresponding to the channel number from the high-speed sequential channel selection program information. There is a fourth step in which data is acquired and a screen display in which a channel number and a still image are superimposed is continuously performed by changing the channel number, and there is a channel selection request. In this case, the fifth step of acquiring the channel number of the channel displayed on the screen at the time of the channel selection request from the high-speed sequential channel selection program information and executing the fifth step of starting channel selection using the first tuner is performed. A computer-readable recording medium on which a program is recorded. 8. A channel selection method for performing high-speed sequential channel selection using a second tuner different from the first tuner used for normal channel viewing and listening, wherein a digital broadcast is always received using the second tuner. A first step of extracting a still image data from the digital broadcast signal received in the first step, and a channel number corresponding to the still image extracted in the second step. A third step of creating and storing high-speed sequential channel selection program information in the form of a table; and, when a high-speed sequential channel selection request is issued, a channel number and a still image corresponding to the channel number from the high-speed sequential channel selection program information. There is a fourth step in which data is acquired and a screen display in which a channel number and a still image are superimposed is continuously performed by changing the channel number, and there is a channel selection request. In this case, the fifth step of acquiring the channel number of the channel displayed on the screen at the time of the channel selection request from the high-speed sequential channel selection program information and executing the fifth step of starting channel selection using the first tuner is performed. program.