KR19980047243A - Multi-channel recording / playback method and apparatus therefor - Google Patents

Abstract

The present invention relates to a multi-channel recording apparatus for recording a multi-channel digital broadcast signal on an optical disc.

The multi-channel recording apparatus includes a tuner for tuning a transport stream in which video packets for a plurality of video programs are temporally multiplexed from a high frequency signal, and at least two or more video programs to be recorded among a plurality of video programs included in the transport stream. A user repeater for inputting selection information, a formatter for selectively formatting video packets for at least two video programs corresponding to the selection information in a transport stream from a tuner into a form suitable for an optical disc, and a format from the formatter. And a recording section for recording the received signal on the optical disk.

With this arrangement, the multi-channel recording apparatus can record several channels of digital broadcast signals simultaneously on the optical disc.

Description

Multi-channel recording / playback method and apparatus therefor

1 is a block diagram of a digital broadcast receiver.

2 is a block diagram of a digital broadcast receiver to which a multi-channel recording / reproducing apparatus according to an embodiment of the present invention is applied.

3 is a flowchart illustrating a method of recording a multi-channel broadcast signal according to a first embodiment of the present invention.

4 is a flowchart illustrating a method of recording a multi-channel broadcast signal according to a second embodiment of the present invention.

5 is a flowchart illustrating a method of recording a multi-channel broadcast signal according to a third embodiment of the present invention.

6 is a flowchart illustrating a method of reproducing a multi-channel broadcast signal according to a first embodiment of the present invention.

7 is a flowchart illustrating a method of reproducing a multi-channel broadcast signal according to a second embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10,20 tuner 12,22 transmission decoder

14,24: descrambler 16,26: video / audio decoder

18,28: D-A converter 30: signal repeater

32: formatter 34: recording and playback section

36: optical disk 38: memory

40: user repeater 42: controller

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording / reproducing apparatus for optically accessing an optical disc, and more particularly, to a multi-channel recording / reproducing method and apparatus capable of recording and reproducing a multi-channel broadcast signal on an optical disc.

Recently, a digital broadcasting station that has started broadcasting compresses a plurality of video programs and transmits the compressed video programs through one broadcast channel having a constant bandwidth. In other words, the digital broadcasting station divides one broadcast channel in time and transmits different video programs in the form of packets in each of the divided time intervals. Accordingly, a plurality of video signal packets that are scrambled in time are repeatedly loaded on one broadcast channel. A continuous stream of such video signal packets is called a transport stream, and each video signal packet is a picture group composed of one reference picture and a plurality of predictive pictures reconstructed from the reference picture. As a result, there are a plurality of time-divided time channels in a constant bandwidth frequency channel used by digital broadcasting stations, and each of these time channels carries video data packets for different video programs.

The digital broadcast signal is received by a digital broadcast receiver, also known as an integrated receiver and decoder. Unlike conventional television receivers, this digital broadcast receiver includes a signal processing system for selecting a frequency channel, selecting a time channel, and decoding a time channel. For reference, a digital broadcast receiver having such a signal processing system will be described in detail with reference to FIG. 1 attached thereto.

Referring to FIG. 1, a digital broadcast receiver includes a tuner 10, a transport decoder 12, and a descrambler 14 connected in series between an input line 11 and an output line 13. , A video / audio decoder 16 and a digital-analog converter (hereinafter referred to as a DA converter) 18. The tuner 10 tunes a transport stream carried on a frequency channel of an arbitrary frequency band from a radio frequency signal from the input line 11. The transport decoder 12 decodes the headers of the video packets included in the transport stream from the tuner 10 to decode headers of one of the plurality of video programs (ie, time channels). Extract data parts called payload. The descrambler 14 descrambles the data portion from the transport decoder 12 and supplies the descrambled data portion to the video / audio decoder 16. The video / audio decoder 16 decodes the data portion from the descrambler 14 according to a decompression algorithm (e.g., an MPEG decompression algorithm) to restore digital video and audio data. Next, the DA converter 18 converts the video and audio data into an analog video and audio signal and supplies the converted video and audio signals to the display device (not shown) via the output line 13. do.

On the other hand, the optical disc has been in the spotlight as a recording medium by being developed to record information without being allowed to reproduce the information. In addition, optical discs are required to record various types of information as well as digital broadcast signals due to their large storage capacity. Accordingly, optical discs require a driver capable of processing various types of information.

However, the current optical disc recording / reproducing apparatus has not been developed to record multi-channel digital broadcast signals on the optical disc.

Accordingly, an object of the present invention is to provide a multi-channel recording method and apparatus capable of recording a multi-channel digital broadcast signal on an optical disc.

Another object of the present invention is to provide a multi-channel reproduction method capable of reproducing a multi-channel digital broadcast signal recorded on an optical disc.

It is still another object of the present invention to provide a multi-channel recording method and apparatus capable of recording a multi-channel digital broadcast signal in a variable speed reproduction manner.

Another object of the present invention is to provide a multi-channel variable speed reproduction method capable of shifting reproduction of a multi-channel digital broadcast signal recorded on an optical disc.

In order to achieve the above object, the multi-channel recording method according to the present invention comprises a first step of tuning a transport stream in which video packets for a plurality of video programs are temporally multiplexed from a high frequency signal; A second step of inputting selection information for at least two video programs to be recorded among the video programs, a third step of selecting video packets for at least two video programs corresponding to the selection information in a transport stream; And a fourth step of formatting video packets for the selected at least two video programs into a form suitable for the optical disc, and a fifth step of recording the formatted signal on the optical disc.

A multi-channel reproducing method according to the present invention comprises a first step of inputting selection information for a video program to be reproduced from at least two or more video programs recorded in a multiplexed form on an optical disc, and at least two or more multiplexed from the optical disc. A second step of reproducing the video packets for the video program, a third step of reconstructing the video packets for the at least two or more video programs reproduced in its original form, and a video packet for the at least two or more video programs reproduced. And a fourth step of selecting only video packets for a video program corresponding to the selection information.

The multi-channel reproducing method according to the present invention comprises a first step of inputting a shift reproducing command, a second step of retrieving position information recorded in a specific area of an optical disc, and a position on the optical disc corresponding to the position information. And a third step of sequentially reproducing the recorded information.

The multi-channel recording apparatus according to the present invention comprises a tuning means for tuning a transport stream in which video packets for a plurality of video programs from a high frequency signal are multiplexed in time, and at least two to be recorded among a plurality of video programs included in the transport stream. Input means for inputting selection information for the above video program, and formatting means for selectively formatting video packets for at least two or more video programs corresponding to the selection information in a transport stream from the tuning means into a form suitable for an optical disc. And recording means for recording the formatted signal from the formatting means on the optical disc.

The multi-channel recording apparatus according to the present invention comprises a tuning means for tuning a transport stream in which video packets for a plurality of video programs from a high frequency signal are multiplexed in time, and at least two to be recorded among a plurality of video programs included in the transport stream. Input means for inputting selection information for the above video program, and formatting means for selectively formatting video packets for at least two or more video programs corresponding to the selection information in a transport stream from the tuning means into a form suitable for an optical disc. First recording means for recording the formatted signal from the format means on the optical disc, data recovery means for restoring bit streams for the plurality of video programs included in the transport stream from the tuning means, and from the data recovery means. The selection of the bit streams A reference image detection means for detecting a reference image included in at least two or more bit streams corresponding to the position of the reference image, and a position on the optical disc on which the reference images for the at least two video programs are recorded by an output signal of the reference image detection means. And position information detecting means for detecting and storing the information in the memory, and second recording means for recording the position information stored in the memory on the optical disc when recording of at least two or more video programs is completed.

Further objects and advantages of the present invention in addition to the above objects will become apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 7.

2 shows a digital broadcast receiver to which a multi-channel optical disc recording / reproducing apparatus according to an embodiment of the present invention is applied. In FIG. 2, the digital broadcast receiver includes a tuner 20, a transmission decoder 22, a descrambler 24, a video / audio decoder 26 connected in series between the input line 21 and the output line 23. FIG. And a DA converter 28.

The tuner 20 tunes a transport stream carried in a frequency channel of any frequency band from the high frequency signal from the input line 21 and transmits the tuned transport stream to the transport decoder 22 via the first node 25. Supply. The transport stream on the first node 25 is arranged with video packets for a plurality of video programs temporally multiplexed. That is, video programs are divided into packet units of a certain size and transmitted on a time-divided arbitrary time channel. Therefore, video packets for video programs corresponding to the number of time channels are repeatedly present in the transport stream. The transport decoder 22 decodes the headers of the video packets included in the transport stream from the tuner 20 input via the first node 25 so as to decode the video of any of a plurality of video programs (ie, time channels). Extract data portions called payloads for a program (i.e., one time channel). The transport decoder 22 then supplies the extracted data parts to the descrambler 24 via the second node 27. The descrambler 24 descrambles the data portions from the transport decoder 22 via the second node 27 and the descrambled data portions via the third node 29 to the video / audio decoder 26. To feed. The video / audio decoder 26 decodes the data portions from the descrambler 24 according to a decompression algorithm (e.g., an MPEG decompression algorithm) to reconstruct the digital video and audio data. Next, the DA converter 28 converts the video and audio data into an analog video and audio signal and supplies the converted video and audio signals to the display device (not shown) via the output line 23. do.

The digital broadcast receiver further includes a signal repeater 30, a formatter 32, and a recording / reproducing section 34 connected in series with the first node 25. FIG. The recording / reproducing section 34 records the record packet stream from the formatter 32 on the optical disk 36 or reproduces the packet stream recorded on the optical disk 36 and supplies it to the formatter 32. The formatter 32 requires the optical disc 36 to request video packets of at least two or more time channels included in the transport stream input via the signal repeater 30 from the first node 25 in multi-channel recording. Convert to packet form. In detail, the formatter 32 extracts video packets (ie, video packets for at least two or more video programs) carried on at least two or more time channels from the transport stream, and extracts the extracted video packets to an optical disc. Convert to the appropriate packet form. The formatter 32 may add the identification code for the time channel to the extracted video packets. In addition, the formatter 32 restores the video packets included in the transport stream from the reproduced packet stream from the recording / reproducing section 34 at the time of reproduction, and transmits the transmission decoder via the signal repeater 30 and the first node 25. To 22). In addition, the formatter 32 decodes the identification code included in the reconstructed video packets to select video packets for a time channel (i.e. video program) desired by the user, and only the data parts included in the selected video packets. The signal may be transmitted to the descrambler 24 via the signal repeater 30 and the second node 27. Next, the signal repeater 30 transmits the transport stream from the first node 25 to the formatter 32 at the time of recording and connects the signal from the formatter 32 to the first node 25 at the time of reproduction. To the descrambler 24 connected to the transmitted decoder 22 or the second node 27. In addition, the signal repeater 30 may transmit an output signal of the transmission decoder 22 from the second node 27 to the formatter 32, and further, bidirectional communication between the third node 29 and the formatter 32 may be performed. You can also relay.

The digital broadcast receiver also has a user repeater 40 and a memory 38 connected to the controller 42. The user repeater 40 transmits a multi-channel write command, frequency and time channel information, a play command, a shift play command, and the like from the user to the controller 42. The memory 38 temporarily stores operation data processed at the controller 42, shift information, and the like. The controller 42 controls the tuning band of the tuner 20 according to the frequency channel information from the user repeater 40, and the video selected by the transmission decoder 22 and the formatter according to the time channel information from the user repeater 40. Control packets. The controller 40 then controls the recording / reproducing operation of the recording / playback section 34 and the rotational speed of the optical disc 36 in accordance with the recording command, reproduction command and shift reproduction command. The recorder controller 42 also has one time channel (i.e. video) of one of the multi-channels being recorded on the optical disc 36 by descrambled data input from the descrambler 24 via the third node 29. Position information on the optical disc 36 on which the reference image (I-video signal in the case of MPEG) in which the program is recorded is detected and the position information is temporarily stored in the memory 38. When the recording of the transport stream is finished, the controller 42 supplies the position information recorded in the memory 38 to the recording / playback section 34 so that the position information is recorded in a specific area (TOC area) of the optical disc 36. do. In addition, the controller 42 includes at least two being recorded on the optical disc 36 when at least one or more auxiliary descramblers such as second and third descramblers (not shown) are connected to the transmission decoder 22. The positional information on the reference image for the above time channels (i.e., two or more video programs) can be recorded in a specific area of the optical disc 36, and furthermore, each of those video programs recorded on the optical disc 36 is shifted. Can be played back. This positional information is used as shifting information so that video information recorded on the optical disc 36 is shifted. In addition, the controller 42 changes the playback position of the recording / playback section 34 in accordance with the positional information at the time of shift reproduction so that only reference images of the video information recorded on the optical disc 36 are reproduced. Finally, the controller 42 designates a signal relay route for the signal controller 30 in accordance with a command from the user repeater 40.

3 is a flowchart illustrating the multi-channel optical disc recording method of the first embodiment for recording video packets in a transport stream for two or more video programs onto an optical disc. The flowchart of FIG. 3 is performed by the controller 42 shown in FIG. 2 and will be described step by step.

In the fifty step, the controller 42 determines whether the multi-channel write mode is set by the logical value of the multi-channel mode flag assigned to any one of the registers in the controller 42. The multi-channel mode flag is set when the multi-channel write command is input from the user repeater 40 to the controller 42 and then reset when the stop command is input from the user repeater 40 to the controller 42. do.

When the multi-channel recording mode flag is set to 1 in the 50th step, the controller 42 receives information about the frequency channel desired by the user from the user repeater 40 and information about time channels (ie, video programs). Enter. The controller 42 controls the tuner 20 so that the transport stream of the frequency band corresponding to the frequency channel information is tuned, and supplies the formatter 32 with information about the time channels desired by the user. (Step 52). The formatter 32 then selects only the video packets corresponding to the time channel information from the controller 42 from the transport stream and converts the selected video packets into a packet form suitable for the optical disc 36.

Next, the controller 42 causes the signal repeater 30 to transmit the transport stream from the tuner 20 to the mater 32, rotates the optical disc 36 at a constant speed, and records and reproduces 34. Start the recording operation (step 54). At this time, video packets for two or more video programs desired by the user start to be recorded on the optical disc 36.

4 is a flowchart illustrating the multi-channel optical disc recording method of the second embodiment of recording video packets in a transport stream for two or more video programs onto an optical disc. The flowchart of FIG. 4 is performed by the controller 42 shown in FIG. 2 and will be described step by step.

In the fifty-sixth step, the controller 42 determines whether the multi-channel write mode is set by the logical value of the multi-channel mode flag assigned to any one of the registers in itself. The multi-channel mode flag is set when the multi-channel write command is input from the user repeater 40 to the controller 42 and then reset when the stop command is input from the user repeater 40 to the controller 42. do.

When the multi-channel recording mode flag is set to 1 in step 56, the controller 42 receives information about the frequency channel desired by the user from the user repeater 40 and information about time channels (ie, video programs). Enter. The controller 42 controls the tuner 20 so that the transport stream of the frequency band corresponding to the frequency channel information is tuned, and supplies the formatter 32 with information about the time channels desired by the user. (Step 58). The formatter 32 then selects only the video packets corresponding to the time channel information from the controller 42 from the transport stream and converts the selected video packets into a packet form suitable for the optical disc 36.

In addition, the controller 42 generates identification codes for time channels desired by the user and supplies the generated channel identification code to the formatter 32 (step 60). Then, an identification code is assigned to each of the video packets selected from the transport stream and then converted into a packet form suitable for the optical disc 36.

Next, the controller 42 causes the signal repeater 30 to transmit the transport stream from the tuner 20 to the formatter 32, rotates the optical disc 36 at a constant speed, and records and reproduces 34. Start the recording operation (step 62). At this time, video packets for two or more video programs desired by the user start to be recorded on the optical disc 36 together with the identification code.

FIG. 5 is a flowchart illustrating a multi-channel optical disc recording method of the first embodiment in which video packets in a transport stream for two or more video programs are recorded on an optical disc in a variable speed reproduction manner. The flowchart of FIG. 5 is performed by the controller 42 shown in FIG. 2 and will be described step by step.

In step 64, the controller 42 determines whether the multi-channel recording mode is set by the logical value of the multi-channel mode flag assigned to any one of the registers in the controller 42. The multi-channel mode flag is set when the multi-channel write command is input from the user repeater 40 to the controller 42 and then reset when the stop command is input from the user repeater 40 to the controller 42. do. When the multi-channel recording mode flag is set to 1 in the 64th step, the controller 42 receives information about the frequency channel desired by the user from the user repeater 40 and information about time channels (ie, video programs). Enter. The controller 42 controls the tuner 20 so that the transport stream of the frequency band corresponding to the frequency channel information is tuned, and the transmission decoder 22 to select a video packet corresponding to the time channel that the user wants to watch. To control. The controller 42 also supplies the formatter 32 with information about the time channels desired by the user in the formatter 32 (step 66). The formatter 32 then selects only the video packets corresponding to the time channel information from the controller 42 from the transport stream and converts the selected video packets into a packet form suitable for the optical disc 36. Subsequently, the controller 42 causes the signal repeater 30 to transmit the transport stream from the tuner 20 to the formatter 32, rotates the optical disk 36 at a constant speed, and records and reproduces 34. The recording operation starts (step 68). At this time, video packets for two or more video programs desired by the user start to be recorded on the optical disc 36.

Further, the controller 42 determines whether the bit stream input from the descrambler 24 via the third node 29 is a signal for the reference image (step 70). When the signal for the reference picture is input from the descrambler 24 in step 70, the controller 42 includes an optical disc on which the reference picture is recorded together with an identification code for the time channel (video program) to which the reference picture belongs. The location information on 36 is stored in the memory 38 (step 74). On the other hand, step 72 is for showing the case of recording the shift information for two or more video programs on the optical disk 36, the controller 42 bit from at least one auxiliary descrambler (not shown) This is done by determining whether the stream is a signal for the reference picture. At this time, if a signal for the reference image is input, the controller 42 performs step 74. After performing the seventy-fourth step, the controller 42 checks the multi-channel mode flag to determine whether recording has ended (step 76). At this time, when the multi-channel mode flag is set to 1, the controller 42 returns to the seventieth step. As a result, the controller 42 repeatedly performs the seventy-seventh through seventy-seventh steps to detect and store the positional information on the reference images until the end of recording.

On the other hand, when the multi-channel mode flag is changed to 0 in step 76, the controller 42 supplies the recording / reproducing section 34 with the position information on the reference image stored in the memory 38 and provides the recording position with the optical disc. By moving to the specific area of 36, the positional information on the reference images is recorded in the specific area of the optical disc 36 (step 78). At this time, the positional information is recorded in the specific area of the optical disc 36 separately for each time channel (ie, video program).

FIG. 6 illustrates an optical disc reproducing method according to an embodiment of the present invention in which only video packets for a time channel (that is, a video program) desired by a user are reproduced among video packets for two or more video programs recorded on an optical disc. It is a flow chart. The flowchart of FIG. 6 is performed by the controller 42 shown in FIG. 2 and will be described step by step.

First, the controller 42 determines whether the regeneration mode is set by the logical value of the regeneration mode flag assigned to any one of the registers in itself (step 80). The regeneration mode flag is set when a reproducing command is input from the user repeater 40 to the controller 42 and then resets when a stop command is input from the user repeater 40 to the controller 42.

When the play mode flag is set to 1 in step 80, the controller 42 inputs information about a time channel (that is, video programs) desired by the user from the user repeater 40. The controller 42 then supplies information about the time channel to which the user wants to reproduce to the transmission decoder 22 to designate a time channel to be reproduced (step 82). Alternatively, the controller 42 may specify the reproduced time channel by supplying the formatter 32 with an identification code for the time channel the user wishes to reproduce.

The controller 42 then causes the signal repeater 30 to transmit the signal from the formatter 32 to the transmission decoder 22 via the first node 25 and to rotate the optical disc 36 at a constant speed. In addition, the recording and reproducing section 34 starts the reproducing operation (step 84). At this time, the formatter 32 restores the video packets for all time channels included in the reproduced packet stream from the recording / reproducing section 34 to its original form, and restores the recovered video packets to the signal repeater 30 and the first. It supplies to the transport decoder 22 via one node 25. Then, the transport decoder 22 decrypts the header of the video packets supplied from the formatter 32 to select only the video packets designated by the controller 42, and only the data portions included in the selected video packets are selected by the second node ( 27 to a descrambler 24 connected thereto. As a result, the output line 23 outputs a video and audio signal for a time channel (ie, a video program) desired by the user.

Alternatively, in step 84 the controller 42 may cause the signal repeater 30 to send a signal from the formatter 32 to the descrambler 24 via the second node 26. At this time, the formatter 32 checks the identification code assigned to the video packets for all the time channels included in the reproduced packet stream from the recording and playback section 34 to identify the same as the identification code from the controller 42. Selects only video packets having a code, i.e., video packets for a time channel (i.e., a video program) that the user wishes to play, and only the data parts included in the selected video packets are the signal repeater 30 and the second node The descrambler 24 is supplied via (27). As a result, the output line 23 outputs a video and audio signal for a time channel (ie, a video program) desired by the user.

The controller 42 waits until the regeneration mode flag by the stop command from the user repeater 40 is reset to zero (step 86). When the playback mode flag is reset in step 86, the controller 42 stops the playback operation of the recording / playback section 34 and the rotation of the optical disc 36.

FIG. 7 illustrates an optical disc reproducing method according to an embodiment of the present invention in which only video packets for a time channel (ie, a video program) desired by a user are shifted and reproduced among video packets for two or more video programs recorded on an optical disc. This is a flow chart. The flowchart of FIG. 7 is performed by the controller 42 shown in FIG. 2 and will be described step by step.

First, the controller 42 judges whether the shift playback mode is set by the logical value of the shift playback mode flag assigned to any one of the registers in itself (step 88). The shift regeneration mode flag is set when the shift regeneration command is input from the user repeater 40 to the controller 42 with the regeneration mode set, and then a stop command or a replay command is sent from the user repeater 40 to the controller 42. It is reset at the time input to or when the last reference image is reproduced. When the shift playback mode is set in step 88, the controller 42 moves the recording / playback section 34 to the specific area of the optical disc 36 so that the time channel that is currently being reproduced recorded in the specific area of the optical disc 36 is lost. (Ie, video information) are input from the recording and playback section 34 (step 90). The controller 42 then stores the input location information in the memory 38 (step 92).

After performing step 92, the controller 42 reads first position information among the position information stored in the memory 38 (step 94). The controller 42 changes the playback position on the optical disc 36 to the position on the optical disc 36 corresponding to the read position information (step 96). At this time, the recording / reproducing section 34 reproduces the video data for the reference image (I-image in the case of MPEG) recorded at the position on the optical disc 36 corresponding to the read position information. The reproduced data is supplied to the transmission decoder 22 or the descrambler 24 via the formatter 32 and the signal repeater 30.

Next, the controller 42 checks whether the shift regeneration mode flag in itself is reset to 0 (step 98) to determine whether the shift regeneration mode has ended. If it is not reset to the shift playback mode flag 0 in step 98 (i.e., when the shift playback mode is finished), the controller 98 searches for the memory 38 and shifts by whether or not position information to be played back remains. It is determined whether the reproduction is completed (step 100). If the positional information to be reproduced in step 100 remains, the controller 42 reads the next positional information from the memory 38 and then returns to step 96 (step 102). In this way, the controller 42 repeatedly performs steps 96 to 102 to record any of the images recorded on the optical disc 36 until the reference image recorded at the position on the optical disc 36 corresponding to the last position information is reproduced. A video program is shifted and played.

On the other hand, if there is no positional information to be reproduced in step 100, the controller 42 resets the shift reproduction mode flag to 0 to cancel the shift reproduction mode (step 104).

As described above, the multi-channel recording / reproducing apparatus according to the present invention selects at least two or more video packets for a time channel from among video packets for a plurality of time channels included in a transport stream and selects the video packets for the time channel. By configuring the packets in the recording format of the optical disc, the digital broadcast signals of several channels can be recorded on the optical disc at the same time, and the digital broadcast signals of the multiple channels recorded on the optical disc can be simultaneously reproduced. The multi-channel recording / reproducing apparatus according to the present invention can selectively play only video information desired by a user among video information of various channels recorded on an optical disc by assigning an identification code according to a time channel to selected packets. have. In addition, the multi-channel recording / reproducing apparatus according to the present invention detects and stores the position information of all the time channels recorded on the optical disc or reference images for one channel, and records them in a specific area of the optical disc. Digital broadcast signals can be simultaneously recorded on an optical disc in a variable speed reproduction manner. In addition, the multi-channel recording / reproducing apparatus according to the present invention can selectively shift and reproduce various video information recorded on the optical disc by using the position information recorded in a specific area of the optical disc.

As described above, the present invention has been described as the embodiments shown in FIGS. 2 and 7, but those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (9)

A first step of tuning a transport stream in which video packets for a plurality of video programs from a high frequency signal are multiplexed in time; A second step of inputting selection information on at least two video programs to be recorded among a plurality of video programs included in the transport stream; Selecting video packets for at least two video programs corresponding to the selection information in the transport stream; A fourth step of formatting video packets for the selected at least two video programs into a form suitable for an optical disc; And a fifth step of recording the formatted signal on an optical disc. The method of claim 1, And adding identification codes indicating a corresponding video program to video packets for the at least two or more video programs selected in the second step. The method of claim 1, Recovering bit streams from video packets for the selected at least two video programs; A seventh step of detecting a reference picture from the bit streams for the at least two video programs; An eighth step of detecting positional information on an optical disc on which the reference images of the at least two video programs are recorded and temporarily storing the positional information in a memory; And a ninth step of recording the position information stored in the memory on the optical disc when the recording of the at least two video programs is completed. A first step of inputting selection information on a video program to be reproduced from at least two or more video programs recorded in a multiplexed form on an optical disc; Reproducing video packets for the multiplexed at least two video programs from the optical disc; Restoring video packets for the played at least two video programs to their original form; And a fourth step of selecting only video packets of a video program corresponding to the selection information among video packets of the at least two or more video programs reproduced. The method of claim 4, wherein And the fourth step selects video packets corresponding to the selection information by an identification code added to the video packets. An optical disc reproducing apparatus for reproducing an optical disc in which at least two or more video programs are recorded in a multiplexed form and position information of reference images of the video program is recorded in a specific area, A first step of inputting a shift playback command, A second step of retrieving location information recorded in a specific area of the optical disc; And a third step of sequentially reproducing the information recorded at the positions on the optical disc corresponding to the positional information. Tuning means for tuning a transport stream in which video packets for a plurality of video programs from a high frequency signal are multiplexed in time; Input means for inputting selection information for at least two video programs to be recorded from among a plurality of video programs included in the transport stream; Formatting means for selectively formatting video packets for at least two or more video programs corresponding to selection information in a transport stream from said tuning means into a form suitable for an optical disc; And recording means for recording the formatted signal from said formatting means onto an optical disc. The method of claim 7, wherein And said formatting means adds an identification code indicating a video program to video packets for the at least two selected video programs. The method of claim 7, wherein Data restoring means for restoring bit streams for a plurality of video programs included in the transport stream from said tuning means; Reference image detection means for detecting a reference image included in at least two or more bit streams corresponding to the selection information among the bit streams from the data recovery means; Position information detection means for detecting and storing in the memory position information on an optical disc on which reference images for the at least two video programs are recorded by an output signal of the reference image detection means; And second recording means for recording the positional information stored in the memory on the optical disc when the recording of the at least two video programs is finished.