KR20060064831A - Apparatus and method for separating chapter automatically in disc recorder - Google Patents

Abstract

The present invention relates to an apparatus and method for automatic chapter separation in a disc recorder. For example, in a disc recorder such as a DVD-Recorder or the like, while performing a data recording operation such as broadcast program recording, When it is determined that an advertisement or the like is inserted into the recording program by detecting a change in the state of the video, the chapter corresponding to the recording position is automatically set and separated, and navigation information corresponding to the chapter is read. By generating and recording, the user can select and skip only portions that he / she does not want in the recorded program, or select and play only portions that he / she wants in the recording program. Bar-shaped images representing the reduced images corresponding to and the separation interval between the chapters Screen, and an OSD video of the Chapter List, which displays menu items for playing, deleting, or linking any chapter, makes it easier to select, play, delete, or link chapters that users want. It is a very useful invention.

DVD recorder, chapter, navigation information, status change, advertisement, OS video

Description

Apparatus and method for separating chapter automatically in disc recorder}             

1 shows a configuration of a general disc recorder.

2 to 5 illustrate navigation information defined in a general DVD VR standard.

FIG. 6 shows a configuration of a disc recorder to which an automatic chapter separating apparatus and method according to the present invention are applied.

7 and 8 show an operation flowchart for the automatic chapter separation method in the disc recorder according to the present invention,

9 illustrates an OSD image of a chapter list displayed and output according to the present invention.

※ Explanation of code for main part of drawing

30: audio input unit 31: C

32: video input unit 33: MPEG encoder

34: PGCI generation unit 35: disc recording unit                 

36 disc 37 PGCI reader

38: disc reader 39: MPEG decoder

40: OSD generator 41: video output unit

42: audio output unit 42: audio detection unit

43: video detector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for automatic chapter separation in a disc recorder. For example, in a disc recorder such as a DVD-Recorder or the like, while performing a data recording operation such as recording a broadcast program, input audio And an automatic chapter separating apparatus and method in a disc recorder for automatically separating chapters more efficiently by detecting and referring to a change in a state of a video.

In general, a disc recorder capable of recording and playing back high-definition video data and high-quality audio data for a long time, for example, a DVD recorder, has been developed and commercialized. The DVD-Recorder is shown in FIG. As shown, CPI 11, audio and video input unit 12, MPEG encoder 13, PGCI (Program Chain Information) generation unit 14, disk recording unit 15, disk 16, PGCI reading unit (17), disc reader 18, MPEG decoder 19, OSD generator 20, video output 21, audio output 22, and the like.

On the other hand, the analog audio and video signals input to the DVD recorder are converted to digital audio and video signals through the audio and video input unit 12, and then output to the MPEG encoder 13, and the MPEG encoder 13 ), The digital audio and video signals are encoded into audio and video data, such as AC3 audio data and MPEG2 video data, which conform to the DVD format.

In addition, the encoded audio and video data is recorded on the disc 16 in real time by the disc recording unit 15, wherein recording position information on the disc on which the encoded audio and video data is recorded is generated by PGCI. Is passed to the unit 14.

In the PGCI generation unit 14, when no data is recorded on the disc 16, for example, the type of the disc is DVD-R, DVD + R, DVD + RW and no data is recorded. In this case, 'VMGI Table', which is navigation information defined in the 'DVD Video' standard, is generated. When the disc is a DVD-RAM, 'RTR_VMGI Table', which is navigation information defined in the 'DVD VR' standard, is generated. Will generate

On the other hand, when the disc is a DVD-RW, a recording format selected by the user is applied. When data is already recorded on the disc, the navigation is recorded by referring to the navigation information recorded on the disc. The information is updated and recorded. Hereinafter, the present invention will be described in detail with reference to an embodiment of generating and recording 'RTR_VMGI Table', which is navigation information defined in the 'DVD VR' standard.

For example, the DVD recorder records and manages data continuously recorded from the start of recording to the end of the DVD-RAM into one program. The program includes a plurality of video object units (VOBUs). Video Object Units, and the PGI generation unit 14 generates a RTR_VMGI Table as navigation information as shown in FIG. 2 by referring to the recording position information on the disc on which the VOBU is recorded in real time. Will be recorded.

On the other hand, in the TM_ENT (Time Difference Entry) recorded in the RTR_VMGI Table, as shown in FIG. The target VOBU address (VOBU_ADDR) information designates a VOBU address in which data is recorded on a disc in a program (or VOB) in which data is currently being recorded. In the PGCI generating unit 14, Whenever VOBU is additionally recorded by the data recording operation, TM_ENT is continuously generated to record and manage the address of the newly recorded VOBU.

In addition, navigation information for reproducing and controlling the program is recorded and managed in a program chain information (PGCI) table, as shown in FIG. 4, and includes cell information (CI) in the PGCI table. The cell information CI is recorded and managed so as to correspond to chapters that divide one program into a plurality of access units, respectively.

If the program is not separated, one cell information (CI) corresponding to one program is recorded and managed. However, if the program is divided into a plurality of chapters, the cell information is generated as many as the separated chapters. In general DVD recorders, since the criteria for separating the chapters are not clear, the chapters are separated at regular time intervals, or after the recording operation is completed, the user directly sets the chapters at a desired position while playing. When the chapter is separated, the PGCI generating unit 14 of the DVD recorder updates the PGCI information.

However, in the general DVD recorder, for example, when performing scheduled recording, since the recording operation is performed with reference to the recording start time and the end time, unnecessary advertisements or the like may be recorded at the beginning or end of the recorded program. In particular, in the case of recording a cable broadcasting, since a plurality of advertisements that are intermittently broadcasted in the middle part of the program are recorded as they are, if the chapters are not automatically separated, the user skips only the portions that the user does not want, Another problem arises in that only the desired portion cannot be selectively reproduced.

Accordingly, the present invention has been created to solve the above problems, and for example, in a disc recorder such as a DVD-Recorder or the like, while performing a data recording operation such as broadcast program recording, input audio and video When it is determined that an advertisement or the like is inserted into the recording program by detecting a change in the state of the recording program, the chapter corresponding to the recording position is automatically set and separated, and the navigation information corresponding to the chapter is generated. By recording, it is possible to provide a method and apparatus for automatic chapter separation in a disc recorder for allowing a user to use a chapter to selectively skip only portions of the recording program that he does not want, or to select and play only portions desired. The purpose is to.

According to an aspect of the present invention, there is provided an automatic chapter separation method of a disc recorder comprising: detecting a change in state of input audio and video; And two steps of automatically separating chapters of the recorded program with reference to the detection result.

Further, an automatic chapter separating apparatus in a disc recorder according to the present invention comprises: detecting means for detecting a change in state of input audio and video; Control means for automatically separating chapters for a recorded program with reference to a change in state of the input audio and video; Generating means for generating navigation information corresponding to the chapter; And recording means for encoding the input audio and video data, recording the data in the data area of the disc, and recording the navigation information in the lead-in area of the disc.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an automatic chapter separating apparatus and method in a disc recorder according to the present invention will now be described in detail with reference to the accompanying drawings.                     

First, the automatic chapter separating apparatus and method according to the present invention can be applied to various types of disc recorders, such as a DVD-Recorder. For example, the DVD recorder to which the present invention is applied is shown in FIG. As described above, the audio input unit 30, the CPI 31, the video input unit 32, the MPEG encoder 33, the PGCI generating unit 34, the disc recording unit 35, the disc 36, and the PGCI reading unit 37 ), A disc reader 38, an MPEG decoder 39, an OSD generator 40, a video output 41, an audio output 42, and the like, and an audio detector 43. The video detector 44 is further included.

The audio detector 43 and the video detector 44 may be included in the CPI 31, and the audio detector 43 passes through the audio input unit 30 to the MPEG encoder 33. It is detected whether the input audio data changes from stereo, voice multiplex, or mono audio to any other audio.

In addition, the video detector 44 detects a digital signal level of video data input to the MPEG encoder 33 via the video input unit 32. For example, the digital of the video data is detected. It is detected whether the signal level change value continues to deviate by more than N fields (eg, 2 Filed) from a predetermined reference value (eg, 7.5 IRE) previously set.

In the CAPI 31, while recording a broadcast program, an advertisement or the like is added to the recorded program with reference to a change in the state of the input audio and video detected by the audio detector 43 and the video detector 44. If it is determined to be inserted, the chapter (Chapter) is automatically set separately, and the operation of the PGCI generation unit 31 is controlled.

On the other hand, the PGCI generation unit 34 uses the MPEG encoder 33 and the disc recording unit 35 to provide navigation information corresponding to a chapter for accessing the recording position of the advertisement data recorded on the disc 36. The recording information is generated and recorded according to the operation control of the CPI 31. As described above, the navigation information corresponding to the chapter is recorded and managed as cell information (CI) in a program chain information (PGCI) table. It will be described in detail as follows.

FIG. 7 is a flowchart illustrating an automatic chapter separating method in the disc recorder according to the present invention. For example, in the CPI 31, a scheduled recording is set according to a user's key input or preset by a user. According to the information, a series of data recording operations such as broadcasting program recording are performed (S10). In the audio input unit 43, audio data output to the MPEG encoder 30 via the audio input unit 30 is stored. In step S11, it is detected whether to change from stereo, voice multiplex, or mono audio to any other audio.

In addition, the video detection unit 44 detects a digital signal level of video data input to the MPEG encoder 33 via the video input unit 32, and the digital signal level change value of the video data is pre-set. It is detected whether the predetermined reference value (for example, 7.5 IRE) set in the N field (for example, 2 Filed) or more continues to be deviated (S12).

The CPI 31 refers to detection signals output from the audio detector 43 and the video detector 44, for example, during recording of a main broadcast program of stereo audio. When the input of the mono audio is detected, it is determined that the audio input state is changed by referring to the detection signal output from the audio detector 43 (S13).

In addition, the CPI 31 outputs the video from the video detector 44 when a zero level video is suddenly input while recording a video of a main broadcast program having a signal level of a predetermined range. With reference to the detected detection signal, it is determined that the video level has been changed. For example, while the amount of change in the video level exceeds a predetermined reference value (for example, 7.5 IRE) preset (S14), the state is N at the same time. If more than one field (eg, 2 fields) is maintained (S15), it is determined that the commercial is currently being recorded.

In the CPI 31, when it is determined that the commercial is recorded as described above, the PGCI generating unit 34 is operated to separate and set chapters and to provide navigation information corresponding to the chapters. After the data recording operation is completed (S16), the above-described series of data recording and chapter automatic separation operations are repeatedly performed until the data recording operation is completed (S17).

On the other hand, when the PGCI generation unit 34 performs a chapter divide operation for accessing the recording position on the disc where the advertisement is recorded as described above, for example, as shown in FIG. The cell information CI corresponding to the separated chapter is additionally recorded in the PGCI table. The cell information is generated and recorded as movie cell information (M_CI: Movie CI) corresponding to a moving picture.

In addition, as shown in FIG. 5, the movie cell information includes cell type information, 'C_TY1 = 000b', indicating that the cell type is a movie cell, and the PGCI generation unit 34. ), The number of cell entry points (C_EPI_Ns: Number of Cell Entry Points) is further increased in the movie cell information, and the current recording time is added to the corresponding cell video start time (C_V_S_PTM: Video Strat PTM) in the movie cell information. of this Cell) (S160).

The number of cells (C_Ns: Number of Cells) is increased by one in the current recorded program information (PGI: Program Information) (S161), and the cell information search in the recorded program chain general information (PGC_GI: PGC General Information) is added. A series of navigation information generation and update recording operations for increasing the number of points CI_SRP_Ns are performed (S162).

On the other hand, in the CPI 31, the PGCI reader 37 and the OSD generator 40 are operated to control the chapter list for the recorded program according to a user's request. The screen is displayed as an OSD image through a screen of an external connected device such as a TV). The PGCI reader 37 reads the program chain information about the recorded program, which is read by the disc reader 38. You will see how many program information (PGI) is in PGCI.                     

Further, the checked program information is output to the CPI 31, and the CPI 31 searches for recorded program information corresponding to a chapter list requested by the user among the program information, and then displays the total reproduction time of the program. The process is determined by VOB_V_S_PTM and VOB_V_E_PTM in M_VOBI.

The display number of chapters is determined according to the number of cells recorded in the recorded program information, and the playback time information for each chapter in the corresponding program (or VOB) is checked. The process is performed in M_C_GI. It is determined by C_V_S_PTM and C_V_E_PTM.

On the other hand, using the information determined as described above, as shown in Fig. 9, the total playback time of the recording program, the number of chapters in the recording program, and the playback time of each chapter are displayed in a bar graph. The first screens of the separated chapters are displayed as thumbnail pictures that allow a user interface to be selected and specified by the user.

In addition, as shown in FIG. 9, in the chapter list of the OSD image, the user displays menu items for playing, deleting, or linking an arbitrary chapter. Chapters corresponding to advertisements can be easily deleted or chapters other than advertisements can be selectively played or linked.

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 automatic chapter separation in a disc recorder according to the present invention constructed and made as described above, for example, in a disc recorder such as a DVD-Recorder or the like, performs a data recording operation such as broadcast program recording or the like. If it is determined that an advertisement or the like is inserted into the recording program by detecting a change in the state of the input audio and video, the chapter corresponding to the recording position is automatically set and separated, and the navigation corresponding to the chapter ( By generating and recording the navigation information, the user can select and skip only the portions of the recorded program that he does not want, or select and reproduce only the portions that he / she wants using the chapter. , The reduced images corresponding to each chapter, and the separation interval between the chapters. The OS graph of the chapter list, which displays a graph in the form of a bar and menu items for playing, deleting or linking an arbitrary chapter, can be displayed to make it easier to select, play, delete, or link the desired chapter. It is a very useful invention.

Claims (15)

Detecting a change in state of the input audio and video; And And a step of automatically separating chapters for the recorded program with reference to the detection result. The method of claim 1, The first step is to detect whether the input audio is changed to any one of stereo, audio multiplex, and mono audio. The method of claim 1, The first step is to detect whether the level change of the input video signal continues beyond the predetermined reference value by more than N fields. The method of claim 1, In the step 2, if it is determined that an advertisement has been inserted with reference to the detection result, the chapter corresponding to the recording position is automatically set. The method of claim 1, And automatically separating the chapters, the method further comprising: generating and recording navigation information corresponding to the chapters. The method of claim 5, The method of claim 3, wherein additionally recording the cell information corresponding to the chapter in the PGCI table, and updating and recording the cell related information already recorded in the PGCI table. The method of claim 5, 4. The method of claim 1, further comprising outputting and displaying an OSD image of a list of chapters in which a user interface is available by searching and searching navigation information corresponding to the chapter. The method of claim 7, wherein In the OSD image, reduced images corresponding to each chapter, a bar-shaped graph indicating a separation interval between the chapters, and menu items for playing, deleting or linking to a certain chapter are displayed. Features automatic chapter separation in disc recorders. Detection means for detecting a change in state of input audio and video; Control means for automatically separating chapters for a recorded program with reference to a change in state of the input audio and video; Generating means for generating navigation information corresponding to the chapter; And And recording means for encoding the input audio and video data to record in the data area of the disc and to record the navigation information in the lead-in area of the disc. Device. The method of claim 9, And the detecting means detects whether the input audio is changed to any one of stereo, audio multiplex, and mono audio. The method of claim 9, And the detecting means detects whether the level change of the input video signal continues to deviate by more than a predetermined reference value by more than N fields. The method of claim 9, And the control means automatically sets the chapter corresponding to the recording position when it is determined that the advertisement is inserted with reference to the change in the state of the input audio and video. The method of claim 9, The generating means generates cell information corresponding to the chapter, and the recording means additionally records the cell information in the PGCI table, and updates and records the cell related information already recorded in the PGCI table. Automatic chapter separators in disc recorders. The method of claim 9, And an OSD generating means for outputting and displaying an OSD image of a list of chapters in which a user interface is available by searching and searching the navigation information corresponding to the chapter. The method of claim 14, The OSD image may include reduced images corresponding to each chapter, a bar graph indicating a separation interval between the chapters, and menu items for playing, deleting, or linking any chapter. Chapter separators in disc recorders.

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