KR20080062156A - Apparatus and method for changing channel in data broadcasting receiver - Google Patents

Abstract

A method and an apparatus for changing the channel in a data broadcasting receiver are provided to link data broadcasting to a previously recorded data broadcasting channel signal when returning to the data broadcasting with a channel change. When the channel is changed during reception of a data broadcasting signal, version information of a data broadcasting program is stored. When data broadcasting prior to channel change is returned, a previously recorded data broadcasting program is reproduced(S34). Version information of a newly received data broadcasting program is identical to the stored version information, recording of the data broadcasting program is restarted from the time when the version information of the newly received data broadcasting program is identical to the stored version information(S36).

Description

Apparatus and method for changing channel in data broadcasting receiver

1 illustrates a configuration of a data broadcast receiver to which the present invention is applied.

2 illustrates an embodiment of a guide screen displaying a time shift state according to the present invention;

3 is a flowchart illustrating an operation of a method for controlling time shift status display in a data broadcast receiver according to the present invention;

4 and 5 illustrate an operation flowchart of a channel switching method in a data broadcasting receiver according to the present invention.

※ Explanation of code for main part of drawing

10: Tuner 11: Demux

12: microcomputer 13: memory

14: Audio Decoder 15: Video Decoder

16: data decoder 17: audio processor

18: video processor 19: buffer memory

20: HDR system 21: hard disk 22: OSD generating unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel switching apparatus and method in a data broadcasting receiver. For example, a channel in a data broadcasting receiver for recording and playing back data broadcasting on a recording medium such as a hard disk (HDD) or the like. A channel switching apparatus and method in a data broadcasting receiver for controlling switching.

In recent years, data broadcasting, which provides data of various contents in the form of data in which JaVa application, HTML application or XML data is encoded into binary data rather than audio and video through digital broadcast propagation, has been carried out.

On the other hand, in a data broadcasting receiver such as a digital television (D-TV) or a set top box (STB) that receives the data broadcasting, when receiving the data broadcasting program in the binary data form, an SDRAM may be used. A series of buffering operations are performed to temporarily store data in a buffer memory such as.

In addition, the data buffered in the buffer memory is decoded and signal processed to be output and displayed as audio, video, text, or the like. A menu screen such as a video, various text information, or an icon capable of a user interface may be simultaneously displayed.

On the other hand, as described above, since the data broadcast is transmitted in the form of binary data, the data broadcast receiver that receives the data broadcast must perform signal processing operations such as audio, video, and text on its own.

However, for example, when a user watches a digital broadcasting channel providing general audio and video and then switches to a data broadcasting channel providing binary data, a certain amount of binary data is buffered in the buffer memory from the channel switching point. Until this time, it is impossible to perform its own decoding and signal processing operations, so that the standby screen is displayed.

In addition, while buffering binary data in the buffer memory, when the user switches to a general broadcast channel, the user clears all previously buffered data, so even if the user returns to the previous data broadcast channel, the channel is returned. Since the standby screen is output from the return time until the predetermined amount of data is buffered in the buffer memory, the user standby time is frequently generated for a long time.

In addition, in the conventional data broadcasting receiver, the control for connecting with the data broadcasting program previously received in the channel switching operation has not been performed. When only channel switching is performed, the display is controlled by receiving a signal for a desired broadcast channel again with the start point of channel switching being performed. Therefore, as mentioned above, in the conventional data broadcasting, there is a problem in that the standby screen is outputted and displayed until the data is buffered in the buffer memory.

Accordingly, the present invention has been created to solve the above problems, for example, to a data broadcast with a channel switching in a data broadcast receiver for recording and playing back a data broadcast on a recording medium such as a hard disk (HDD). It is an object of the present invention to provide a channel switching apparatus and method in a data broadcast receiver for controlling to be connected to a previously recorded data broadcast channel signal.

According to an aspect of the present invention, there is provided a channel switching method in a data broadcasting receiver, the method comprising: storing channel information of a data broadcasting program that is being recorded when channel switching occurs while receiving data broadcasting; Reproducing the previously recorded data broadcast program when returning to the data broadcast channel before channel switching; And a third step of checking the version information of the newly received data broadcast program and resuming the recording of the data broadcast program from when it matches the stored version information.

The third step of the present invention is characterized in that the control is performed in association with the previous recording data.

The third step of the present invention is characterized by performing a time shift operation of recording and reproducing data broadcast program data on a recording medium.

The present invention provides a fourth step of searching for a recording and playback state of a data broadcast program and a data buffering state when a channel switch is requested while receiving a data broadcast; And generating and outputting a guide screen corresponding to the retrieved recording and reproducing state and the data buffering state.

In addition, the channel switching apparatus of the data broadcast receiver according to the present invention for achieving the above object comprises storage means for temporarily storing a data broadcast program; Recording and reproducing means for recording and reproducing the temporarily stored data broadcasting program on a recording medium; And control means for storing version information of the data broadcast program, controlling reproduction of a previously recorded data broadcast program upon returning to the data broadcast channel, and controlling recording of the data broadcast program based on the stored version information. Characterized in that it comprises a.

The control means of the present invention is characterized in that for storing the version information of the data broadcast program during the channel switching operation.

The control means of the present invention, during the channel switching operation, retrieves the recording and playback state and the data buffering state of the data broadcast program, and controls the generation operation of the corresponding guide screen, according to the operation control of the control means And an OSD generating means for generating and outputting a guide screen corresponding to the recording and reproducing state and the data buffering state as an OSD image.

Hereinafter, exemplary embodiments of a channel switching apparatus and method in a data broadcasting receiver according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a configuration of a data broadcast receiver to which the present invention is applied. For example, a data broadcast receiver such as a digital television (D-TV) or a set-top box (STB) includes a tuner 10a and a demux. (11), microcomputer (12), memory (13), audio decoder (14), video decoder (15), data decoder (16), audio processor (17), video processor (18), buffer memory (19), The HDR (HDD Recorder) system 20, the hard disk 21, the OSD generator 22, and the like are included.

On the other hand, in the microcomputer 12, if any one broadcasting channel is selected by a user's key input, the tuner 10a is operated to tune the broadcasting channel, and in the demux 11, Search and confirm the packet ID (PID) included in the header of the transport packet of the broadcast data stream received through the tuner 10a, for example, the MPEG transport stream. Done.

The audio data recorded in the payload of the transport packet is output to the audio decoder 14 and the video data is output to the video decoder 15 with reference to the confirmed packet ID. For example, if the currently tuned broadcast channel is a data broadcast channel, the demux 11 outputs binary data to the data decoder 16 by referring to a packet ID included in a header of the transport packet. Done.

On the other hand, in the data decoder 16, the binary data is buffered in the buffer memory 19. For example, in the buffer memory 19, an SDRAM (SDRAM) having a 32MB or 64MB recording size is provided. When a certain amount of data is buffered in the buffer memory 19, the data decoder 16 reads and decodes the buffered data.

The audio data of the decoded data is output to the audio processor 17, and the video data of the decoded data is output to the video processor 18, and text or a user selection of the decoded data is output. Various content data such as an icon is output to the microcomputer 12.

On the other hand, the microcomputer 12, the operation control the OSD generating unit 22, so that a menu screen of various contents such as the text or user selection icon is output, so that the user, by the audio processor and the video processor At the same time as watching the audio and video signal processing itself, it is possible to watch a menu screen of various contents such as the text or user selection icon.

In addition, when performing a time shift operation according to a user's request, the microcomputer 12 operates to control the HDR system 20 to store binary data buffered in the buffer memory 19. While recording on the hard disk 21, a series of time shift operations for reproducing data recorded before a predetermined time are performed.

In addition, the microcomputer 12 controls the data decoder 16 to control the output of the data broadcast, and when the channel switching request is confirmed by the user's key signal input, the microcomputer 12 controls the operation for channel switching. . At this time, a time shift status display operation for displaying the currently received data (data stored in the buffer memory) and the data stored in the storage medium (hard disk) for the data broadcast being viewed is performed. When the channel is switched based on the time shift status indication and then switched to the current data broadcasting channel, a control is performed to output a warning message for a returnable position and a non-returnable position.

When the channel is switched from the data broadcasting channel to the general broadcasting channel, the microcomputer 12 stores version information about the data broadcasting program that was received in the data broadcasting channel. The controller further controls to continuously store data on the data broadcast program recorded during the reception of the data broadcast channel on the hard disk until power is cut off. When returning to the data broadcasting channel before power is cut off, the stored data broadcasting signal is reproduced so that there is no buffering waiting time. Then, while reproducing the data broadcast signal stored in the hard disk, information of the data broadcast program included in the data broadcast channel received based on the stored version information is checked at the same time. When the version information of the data broadcast program in the newly received data broadcast channel and the stored version information match, control is performed to resume recording from the matched data broadcast program. At this time, the recording of the data broadcast program is controlled to be performed by connecting to the previous recording. A control operation in which channel switching is performed during data broadcasting under the control of the microcomputer 12 will be described in detail with reference to FIGS. 4 and 5.

On the other hand, during the time shift operation described above, when a time shift state display operation is requested by the user, the data recording and reproducing state of the hard disk 21 and the data buffering state of the buffer memory 19 are performed. After the operation is performed, the OS D generation unit 22 is controlled to generate and output a guide screen indicating a current recording and reproducing state and a data buffering state, as shown in FIG. 2. The explanation is as follows.

3 is a flowchart illustrating a method of controlling a time shift state display in a data broadcast receiver according to the present invention. For example, while receiving a data broadcast stream (S10a), a time shift is requested by a user. When performing the operation, the microcomputer 12 operates the data decoder 16 and the HDR system 20 to control binary data temporarily stored in the buffer memory 19, and the hard disk 21. In step S11, a series of time shift operations are performed to read and reproduce data recorded before a predetermined time (S11).

On the other hand, the microcomputer 12, while performing the time shift operation as described above, when the time shift status display is requested by the user (S12), the program information for the currently received data broadcast is retrieved ( S13).

For example, the service information provided intermittently through digital broadcasting includes various broadcast program information such as a broadcast program name, a broadcast program start and end time, and the like. The received service information is searched in the memory 13 to search and confirm the start and end times of the data broadcast program currently being received.

In addition, the microcomputer 12 searches for the recording amount of the data broadcasting program recorded on the hard disk 21, and then calculates the recording ratio (S14). For example, the data broadcasting program is '100'. Minute ', and when the '75 minutes' data is recorded on the hard disk, the recording rate is calculated as '75%'.

In addition, the microcomputer 12 searches for the recording capacity of the buffer memory 19 and the amount of data currently buffered (S15). For example, the recording capacity of the buffer memory is 64MB and is currently buffered. If the data is 21MB, it is determined that about one third of the data is buffered, and the data recording position of the hard disk currently being read and reproduced is searched and confirmed as the display position (S16).

On the other hand, the microcomputer 12, in accordance with the search results, the operation control the OSD generating unit 22 to generate and output a guide menu screen of the OS video showing the current time shift state, For example, as shown in FIG. 2, a bar-shaped guide menu screen may be generated and output.

In addition, the bar-shaped guide menu screen may display a start and end of a corresponding data broadcasting program, a recording end of a hard disk, and a recording rate (eg, Record = 75%) of the hard disk. In addition, the buffer end (Buffer_End) indicating the recording capacity of the buffer memory, and the actual buffering (Buffering) state is displayed.

In addition, the actual buffering state displayed on the guide menu screen gradually increases as time passes, and when a certain time passes, the buffering state is initialized to a zero value. Through the guide menu screen, it is possible to easily check the recording and playback state and the data buffering state of the data broadcast program currently being viewed. In particular, the channel change timing is appropriately adjusted with reference to the buffering state.

For example, by waiting for a channel change until the buffering state displayed on the guide menu screen is initialized to a value of zero, data buffered for a predetermined time in the buffer memory 19 is stored in the hard disk. Before recording, it is possible to prevent the channel change from being cleared without meaning.

In addition, the microcomputer 12 performs a corresponding operation requested by the user later (S18). For example, after switching to a general broadcast channel and returning to a previous data broadcast channel, the hard disk By using the data recorded in 21, it is possible to quickly output and display the data broadcast screen without the standby screen.

Next, a detailed description will be given of an operation process controlled when a channel change occurs due to a user's request while receiving a data broadcast in the data broadcast receiver according to the present invention.

4 is a flowchart illustrating an operation controlled when channel switching is performed in the data broadcasting receiver according to the present invention.

The tuner 10 receives the data broadcast stream corresponding to the broadcast channel selected by the user, and the demux 11 extracts only the signal corresponding to the data broadcast program selected by the user from the data broadcast stream to the data decoder 16. Will print. The data decoder 16 buffers binary data in the buffer memory 19, and when a certain amount of data is buffered in the buffer memory 19, the data decoder 16 reads and decodes the buffered data. do. In this way, the decoded data is displayed on a display device (not shown), and a data broadcast program desired by the user is output (S20, S21).

While the operation control is performed as described above, the microcomputer 12 simultaneously controls the operation of the demux 11 at the user's request to provide a general broadcast program for providing audio and video and a data broadcast program for providing binary data. You can choose.

In general, viewers or users who watch a broadcast search for a plurality of broadcast channels and select a desired broadcast program before selecting a broadcast to watch. At this time, the viewer or the user switches the broadcast channel several times, and the broadcast signal displayed on the display device changes every time the channel switching operation is performed.

Meanwhile, a plurality of broadcast programs (for example, eight service broadcast programs) are received in one digital broadcast channel in a multiplexed state. Therefore, when the broadcast channel that the viewer or the user changes through the remote controller (remote control device) is a service broadcast program included in the same digital broadcast channel, the output signal of the demux 11 is changed, but the viewer or the user When the broadcast channel changed through the remote controller is not a service broadcast program included in the same digital broadcast channel, a change occurs in the received signal of the tuner 10. In the following, the tuned channel through the tuner 10 is called a digital broadcast channel, and the signal output through the demux 11 is called a service broadcast channel.

Accordingly, when the service broadcast channel change is performed at the request of the user while the service broadcast channel signal corresponding to the data broadcast is output in steps S20 and S21 (S22), the microcomputer 12 performs the step S22. In operation S23, it is determined whether the service broadcast channel requested by the user is included in the same digital broadcast channel as the service broadcast channel corresponding to the data broadcast in the output state (S23).

In step S23, as described above, since a plurality of service broadcast programs are received in a multiplexed state on one digital broadcast channel, the tuner 10 is included in the case where the requested service broadcast channel is included in the same digital broadcast channel. No change is made to the digital broadcast channel tuned at < RTI ID = 0.0 >). ≪ / RTI >

That is, when it is determined that the service broadcast channel selected in step S22 is included in the digital broadcast channel being received by the tuner 10, the microcomputer 12 controls the output of the demux 11 and outputs it in step S21. The service broadcast channel signal corresponding to the data broadcast channel being used and the service broadcast channel signal selected in step S22 are controlled to be output together. In this case, the service broadcast channel selected in step S22 may be a service broadcast channel corresponding to a general broadcast, not a data broadcast.

At this time, the data decoder 16 receives the output signal of the demux 11 and performs a control of continuously recording the signal of the service broadcast channel corresponding to the data broadcast being output in step S21 to the hard disk 21. do. The audio decoder 14 and the video decoder 15 receive an output signal of the demux 11, that is, a signal corresponding to general broadcasting, decode and output the signal (S24).

However, if it is determined that the service broadcast channel selected in step S22 is not included in the digital broadcast channel being received by the tuner 10, the microcomputer 12 changes the service broadcast channel requested in step S22 to the following. The same control is performed first.

First, the current reception state of the data broadcast channel being received in step S21 is displayed by the time shift display operation. That is, after retrieving the data recording and reproducing state of the hard disk 21 and the data buffering state of the buffer memory 19, the OSD generating unit 22 is controlled to operate, as shown in FIG. Similarly, a guide screen indicating a current recording and playback state and a data buffering state is generated and output. The display state control is omitted if it is already being displayed.

The buffering data of the display data shown in FIG. 2 is cleared when a channel change is made at the present time (S25). The step S25 may be provided in the form of a warning message through the OSD generator 22. That is, under the control of the microcomputer 12, a message is output that the buffering data of the time shift display data is cleared when the channel switching is performed at the present time. In this case, it may be possible to output a message indicating that the return to the current data channel is impossible when the data is cleared. In addition, when the channel is changed and the user returns to the current data broadcasting channel, it may be possible to output a message indicating that the message is limited to the data stored in the hard disk for the position that can be returned within a predetermined time.

In addition, the step S25 may be variously controlled. For example, when the channel is switched at the present time, it is notified that it is impossible to return to the current location later within a certain time, and the user is notified how far the final received data is finished. Within the predetermined time, the time required for receiving the data broadcast again and being buffered in the buffer memory 19 is represented.

In step S25, when buffering data exists, as shown in FIG. 2, when the channel is switched, the buffering data is cleared. However, when buffering data does not exist as in the third state shown in FIG. 2 when the channel is switched, there is no loss of the received data. Therefore, the microcomputer 12 performs the same control as in step S25 so that the user can perform the channel switching time when the loss of the received data does not occur. In addition, the microcomputer 12 may calculate a waiting time at which the buffering data can be processed based on a general buffering data processing time of the buffer memory, and perform control to inform the user of the time.

After outputting the warning message according to the channel switching as in step S25, the microcomputer 12 checks whether to perform channel switching to the service broadcast channel selected in step S22 (S26).

After checking in step S26, when the user requests channel switching of the service broadcast channel, the microcomputer 12 controls the tuning of the tuner 10 so that the digital broadcast channel including the service broadcast channel selected in step S22 may be received. (S27). In step S27, the version information of the data broadcast program included in the data broadcast channel currently being received for control when returning to the data broadcast of step S21 is stored. In addition, the location information of the data broadcasting program stored in the hard disk 21 is also stored in association with the stored version information.

However, if the user cancels the channel switching of the service broadcast channel after checking in step S26, the microcomputer 12 controls the service broadcast channel switching operation to a temporary standby state (S28). In step S28, the data broadcasting channel currently being received is maintained.

Next, a control process for returning to the data broadcast channel after switching to another service broadcast channel while receiving data broadcast under the control as shown in FIG. 4 will be described.

Prior to the operation description, the data broadcast included in the digital broadcast channel received through the tuner 10 takes the form of repeatedly transmitting the same broadcast data. This is because in the case of data broadcasting, since binary data is transmitted substantially, if some data is damaged during transmission, the original signal cannot be decoded. Therefore, the transmitting side repeatedly transmits the same data broadcasting data at regular intervals, so that the receiving side is controlled to receive and use again even if an error is included in the currently received data broadcasting data.

Therefore, the data broadcast data described in the present invention can be repeatedly received at regular intervals, and even if the data broadcast data is interrupted in the middle of reception by an operation such as channel switching, the data broadcast data repeatedly transmitted is replayed. It is possible to receive and use. When returning to the data broadcast again, in order to record after the previously stored recording data, a reference point for connecting the previously recorded state to the currently received data is required.

5 is a flowchart illustrating a control process performed when a channel switching operation is performed in the data broadcasting receiver and when the data broadcasting receiver returns to data broadcasting that was previously recorded.

In operation S27 of FIG. 4, a switch is made from the data broadcast channel to another service broadcast channel in step S27. At this time, the microcomputer 12 stores version information of the data broadcasting program for the data broadcasting channel being received. The version information is included in header information provided from the demux.

The digital broadcast channel received in step S30 is a broadcast signal including the service broadcast channel switched in step S27. For this purpose, the microcomputer 12 controls the tuning of the digital broadcast channel of the tuner 10. The tuner 10 receives a broadcast stream corresponding to the broadcast channel selected in step S22, and the demux 11 extracts and outputs only a signal corresponding to a service broadcast channel selected by the user from the broadcast stream. The output signal of the demux 11 is decoded and displayed on a display device (not shown) so that a program of a service broadcast channel desired by the user is output (S30 and S31).

When the service broadcast channel signal is output in step S30 and step S31, and the service broadcast channel is changed by the user's request (S32), the microcomputer 12 transmits the service broadcast channel requested by the user in step S32. If it is a broadcast channel, it is determined whether it is the same data broadcast channel as the data broadcast channel recorded in step S21 (S33). That is, step S33 is a process of checking whether the requested service broadcast channel is a data broadcast channel and whether it is the same broadcast as the selected data broadcast channel after power is supplied to the set. If there are a plurality of previously selected data broadcast channels, it is determined whether the data broadcast channel is one of the plurality of data broadcast channels.

If it is determined in step S33 that the currently requested service broadcast channel is the same broadcast channel as the previous data broadcast channel, the microcomputer 12 performs control to perform reception and recording of the data broadcast channel in connection with a previous recording state. .

The microcomputer 12 first reads and reproduces the same data broadcast channel signal stored in the hard disk 21 during a waiting time in which the received data is stored in the buffer memory 19 and waiting for decoding. . In operation S34, version information regarding the program included in the data broadcast channel being received is checked. The version information is confirmed from control information included in a header provided through the demux 11. To this end, when data transmission data is transmitted from the transmitting side, version information about data included in the data broadcasting channel should be included in the header information and transmitted.

As mentioned above, the data broadcast is controlling to repeatedly transmit the same broadcast data. In addition, various data broadcast programs may be recorded in the data broadcast. Therefore, the version information check in step S34 is a process for finding the same broadcast program as the data broadcast program previously received and recorded in the data broadcast channel.

The microcomputer 12 compares the version information checked in step S34 with the version information stored in step S27 (S35). If the two version information is the same in step S35, recording of the data broadcasting channel is performed from the data broadcasting program having the same version information (S36). In step S36, the control is performed such that the recording is performed in association with the previously stored recording.

If the currently requested service broadcast channel is not the same broadcast channel as the previous data broadcast channel in step S33, the microcomputer 12 performs control on the requested service broadcast channel (S37).

Accordingly, the user can easily check the time shift operation state for the general broadcast program and the time shift operation state for the data broadcast program through the guide menu screen, and thus can appropriately adjust the channel change time point. In addition, when the channel is switched during the reception of the data broadcast, and when the return to the previous data broadcast is performed again, the previously recorded data broadcast signal is played and the recording of the newly received data broadcast is performed in association with the previous recording state. It is possible to control so that.

In another embodiment of the present invention, in order to find a reference point for controlling connection of recording for the same data broadcasting channel in steps S34 and S35, some data may be extracted and compared from the recording data stored in the hard disk. Do. That is, a certain amount of data last stored in the hard disk (a quantity determined by an experimental value that can be compared to find the same broadcast program) is compared with a part of the newly received data broadcast signal. It may also be possible to regard the same data broadcast program if the two data are the same or nearly similar.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The apparatus and method for channel switching in a data broadcasting receiver according to the present invention constituted and constructed as described above are provided with a channel switching in a data broadcasting receiver for recording and reproducing data broadcasting on a recording medium such as a hard disk (HDD). When returning to the broadcast, control to connect the previous data broadcast and the reception and recording status. To this end, the present invention controls to store the version information of the received data broadcast program when a channel switching operation occurs during data broadcast reception. In the present invention, when the channel is switched during the reception of the data broadcast, and the return to the previous data broadcast is made again, the data broadcast is recorded on the basis of the version information while playing back the previously recorded data broadcast. It is a very useful invention that it is possible to control to be made in conjunction with the previous recording state.

Claims (7)

A first step of storing version information of a data broadcasting program that was being recorded when channel switching occurs while receiving data broadcasting; Reproducing the previously recorded data broadcast program when returning to the data broadcast channel before channel switching; And And a third step of checking the version information of the newly received data broadcast program and resuming the recording of the data broadcast program from when it matches the stored version information. The method of claim 1, The third step, the channel switching method of the data broadcast receiver, characterized in that the control is performed in association with the previous recording data. The method of claim 1, The third step, the channel switching method of the data broadcast receiver, characterized in that for performing a time shift operation for recording and reproducing data broadcast program data on a recording medium. The method of claim 3, wherein A fourth step of searching for a recording and reproducing state and a data buffering state of the data broadcast program if a channel switch is requested during the reception of the data broadcast; And a fifth step of generating and outputting a guide screen corresponding to the retrieved recording and reproducing state and the data buffering state. Storage means for temporarily storing a data broadcast program; Recording and reproducing means for recording and reproducing the temporarily stored data broadcasting program on a recording medium; And Control means for storing version information of the data broadcast program, controlling reproduction of a previously recorded data broadcast program upon returning to the data broadcast channel, and controlling recording of the data broadcast program based on the stored version information. Channel switching apparatus in a data broadcast receiver, characterized in that configured to. The method of claim 5, wherein And said control means stores the version information of said data broadcast program during a channel switchover operation. The method of claim 5, wherein The control means, during the channel switching operation, retrieves the recording and playback state and the data buffering state of the data broadcast program, and controls the operation of generating the corresponding guide screen, In accordance with the operation control of the control means, the channel in the data broadcasting receiver further comprises an OSD generating means for generating and outputting the guide screen corresponding to the recording and playback state and the data buffering state as an OSD image Switching device.

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