KR20080062151A - Apparatus and method for changing channel in data broadcasting receiver - Google Patents

Abstract

An apparatus and a method for changing a channel in a data broadcast receiver are provided to allow a user to check a recorded and reproduced state simply according to a time shift operation. A buffer(19) temporarily store a data broadcast program. A HDR(Hard Disk Recorder) system(20) records the temporarily stored data broadcast program on a recording medium or reproduces it. When a change of a service broadcast channel is requested, a microcomputer(12) searches a recorded and reproduced state and a data buffering state, and controls an operation of generating a guidance screen image indicating that it is not possible to return to a position of the buffering data when the channel is changed. An OSD(On Screen Display) generator(22) generates and outputs the guidance screen image indicating that it is not possible to return to the position of the buffering data, as an OSD image.

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 is a flowchart illustrating a method of switching a channel 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 reproducing 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 encoded by JaVa application, HTML application or XML data, rather than audio and video, through binary data, has been performed.

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.

Therefore, the present invention was created to solve the above problems, and for example, data broadcasting for controlling channel switching in a data broadcasting receiver for recording and playing back data broadcasting on a recording medium such as a hard disk (HDD). It is an object of the present invention to provide a channel switching device and a method in a receiver.

A channel switching method in a data broadcasting receiver according to the present invention for achieving the above object comprises the steps of: performing a time shift operation of recording and reproducing data broadcast program data on a recording medium; A second step of searching for a recording and playback state and a data buffering state when a service broadcast channel switch is requested; And generating and outputting a guide screen indicating that the screen is not returned to the location of the buffering data when the service broadcast channel is switched.

The present invention may further include a fourth step of generating and outputting a display screen corresponding to the searched recording and playback state and the data buffering state when the service broadcast channel switch is requested.

According to an embodiment of the present invention, if the service broadcast channel is requested to be switched, the fifth step of checking whether the requested service channel is the same digital broadcast channel as the data broadcast program; And a sixth step of controlling to display the requested service broadcast channel signal while continuing to record the signal.

The present invention is characterized in that the third step is performed if it is determined that the digital broadcasting channel is another in the fifth step.

The third step of the present invention is characterized in that it further comprises the step of generating and outputting a guide screen indicating that it is possible to return to the position of the recorded data when switching the service broadcast channel.

The third step of the present invention is characterized by generating and outputting a clear warning message of the buffering data.

The third step of the present invention is characterized in that for outputting a time corresponding to the processing time of the buffering data.

The present invention may further comprise the step of re-confirming whether to switch channels to the requested service broadcast channel after outputting the guide screen of the third step.

In addition, the channel switching apparatus in the data broadcast receiver according to the present invention for achieving the above object, the storage means for temporarily storing the data broadcast program; Recording and reproducing means for recording and reproducing the temporarily stored data broadcasting program on a recording medium; Control means for retrieving a recording and reproducing state and a data buffering state when the service broadcast channel switch is requested, and controlling an operation of generating a guide screen indicating that the user cannot return to the buffering data position; And an OSD generating means for generating and outputting a guide screen indicating that the buffering data is not returned to the position of the buffering data in accordance with the operation control of the control means.

The storage means of the present invention is characterized in that the buffer memory for temporarily storing the data broadcast program.

The recording and reproducing means of the present invention is a hard disc recorder which reads and reproduces data recorded before a predetermined time while recording the temporarily stored data broadcasting program on a hard disk.

The OSD generating means of the present invention is characterized by generating and outputting a clear warning message for the buffering data at the time of channel switching, according to the operation control of the control means.

The OSD generating means of the present invention is characterized by generating and outputting time data corresponding to the processing time of the buffering data according to the operation control of the control means.

The OSD generating means of the present invention is characterized by generating and outputting a message indicating returning to the position of the recorded data upon returning to the data broadcasting channel according to the operation control of the control means.

When the service broadcast channel switching is requested, the control means of the present invention controls an operation of generating a display screen corresponding to the retrieved recording and playback state and the data buffering state, and the OSD generating means is configured to include the control means. According to an operation control, a display screen corresponding to the recording and reproducing state and the data buffering state is generated and output.

The control means of the present invention checks whether the requested service channel is the same digital broadcast channel as the data broadcast program when the service broadcast channel switch is requested, and continues recording of the data broadcast channel signal when included in the same digital broadcast channel. And controlling the display of the requested service broadcast channel signal.

The control means of the present invention is characterized in that when the requested service broadcast channel is a digital broadcast channel which is not the same as the data broadcast program, it is determined whether to switch to the requested service broadcast channel after outputting the guide screen.

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.

1 shows a configuration of a data broadcasting receiver to which the present invention is applied. For example, a tuner 10 and a demux are used for a data broadcasting receiver such as a digital television (D-TV) or a set-top box (STB). (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 10 is operated to tune the broadcasting channel, and the demux 11 performs the tuning. Search and confirm the packet ID included in the header of the transport packet of the broadcast data stream received through the tuner 10, 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 with reference to the confirmed packet ID, and the video data is output to the video decoder 15. For example, if the currently tuned broadcast channel is a data broadcast channel, the demux 11 refers to the packet ID included in the header of the transport packet, and converts the binary data into the data decoder 16. Will output

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 in response to a user's request, the microcomputer 12 controls the HDR system 20 to hardly store binary data buffered in the buffer memory 19. While recording on the disc 21, a series of time shift operations are performed to reproduce data recorded before a predetermined time.

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. 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 FIG. 4.

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 (S10), 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. At this time, it will be possible to output a message indicating that the return to the current data broadcast channel is impossible to return to the current data channel. 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 data is limited to the data stored in the hard disk about the returnable position.

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 switching time is shown in FIG. 2, 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).

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.

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.

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 switching channels in a data broadcast receiver according to the present invention constructed and configured as described above, for example, reproduces data recorded before a predetermined time while recording the data broadcast on a recording medium such as a hard disk (HDD). During the time shift operation, if a time shift status display is requested, the user can time-shift by displaying a bar-shaped guide screen for guiding the recording and playback status and the data buffering status. It is a very useful invention that it is possible to easily check the recording and playback state by the operation, and also to accurately check the current data buffering state through the guide screen, it is possible to efficiently adjust the channel change time.

Claims (17)

A first step of performing a time shift operation of recording and reproducing data broadcast program data on a recording medium; A second step of searching for a recording and playback state and a data buffering state when a service broadcast channel switch is requested; And And a third step of generating and outputting a guide screen indicating that the buffering data is not returned to the location of the buffered data when the service broadcast channel is switched. The method of claim 1, And a fourth step of generating and outputting a display screen corresponding to the searched recording and playback state and the data buffering state when the service broadcast channel switching is requested. The method according to claim 1 or 2, A fifth step of checking whether the requested service channel is the same digital broadcast channel as the data broadcast program when the service broadcast channel switch is requested; If it is determined in the fifth step that the same digital broadcast channel, the data broadcast receiver further comprises a sixth step of controlling to display the requested service broadcast channel signal while continuing to record the data broadcast channel signal How to switch channels. The method of claim 3, wherein And determining the other digital broadcasting channel in the fifth step, performing the third step. The method of claim 4, wherein The third step, the channel switching method of the data broadcasting receiver, characterized in that for generating and outputting a clear warning message of the buffering data. The method of claim 5, wherein The third step may further include generating and outputting a guide screen indicating that returning to the position of the recorded data when the service broadcast channel is switched. The method of claim 4, wherein And the third step outputs a time corresponding to a processing time of buffering data. The method according to claim 1 or 2, And reconfirming whether to switch to a requested service broadcast channel after outputting the guide screen of the third step. 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; Control means for retrieving a recording and reproducing state and a data buffering state when the service broadcast channel switching is requested, and controlling a generation operation of a guide screen indicating that the channel does not return to the position of the buffering data when the channel is switched; And In accordance with the operation control of the control means, the channel in the data broadcasting receiver comprising an OSD generating means for generating and outputting an OSD image indicating a guide screen indicating that the return to the position of the buffering data Switching device. The method of claim 9, And the storage means is a buffer memory for temporarily storing the data broadcast program. The method of claim 9, And the recording and reproducing means is a hard disc recorder which reads and reproduces data recorded before a predetermined time while recording the temporarily stored data broadcasting program on a hard disk. The method of claim 9, And the OSD generating means generates and outputs a clear warning message for the buffering data upon channel switching in accordance with the operation control of the control means. The method of claim 12, And the OSD generating means generates and outputs time data corresponding to the processing time of the buffering data according to the operation control of the control means. The method of claim 13, And the OSD generating means generates and outputs a message indicating that returning to the position of the recorded data upon returning to the data broadcasting channel according to the operation control of the control means. The method of claim 9, When the service broadcast channel switching is requested, the control means controls an operation of generating a display screen corresponding to the retrieved recording and playback state and the data buffering state, And the OSD generating means generates and outputs a display screen corresponding to the recording and reproducing state and the data buffering state according to the operation control of the control means. The method of claim 9, The control means checks whether the requested service channel is the same digital broadcast channel as the data broadcast program when switching to the service broadcast channel is requested, and when the service means is included in the same digital broadcast channel, the control means continuously receives the recording of the data broadcast channel signal. A channel switching apparatus in a data broadcasting receiver, which controls the display of a service broadcasting channel signal. The method of claim 16, When the requested service broadcast channel is a digital broadcast channel that is not the same as the data broadcast program, the control means reconfirms whether to switch to the requested service broadcast channel after outputting the guide screen. Channel changer.

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