KR20040090195A - Method for managing recorded program information in optical disc device - Google Patents

Abstract

PURPOSE: A method for managing recording program information in an optical disk device is provided to record/manage various information about recorded programs on an optical disk by using EPG(Electronic Program Guide) information. CONSTITUTION: A CPU updates/corrects reproduction information(S10), and additionally updates a PGI(Program Information) table(S12). The CPU initializes the number of cells to '1'(S13), and records a recording date, a recording channel, and a recording mode(S14). A data handler obtains a pointer of EPG information(S15). If an available EPG information pointer exists(S16), the data handler records/manages a read title of a program(S17). If detailed information exists in the EPG information(S18), an item text table and an item text search pointer are additionally recorded(S19), and the detailed information is recorded(S20). The CPU updates/records a final address of number information of the item text search pointer and text data management information(S21). The CPU updates/records a value of the item text search pointer(S22), and changes/records cell number information and program number information(S23), then completes a correction of reproduction information(S24).

Description

Method for managing recorded program information in an optical disc device {Method for managing recorded program information in optical disc device}

The present invention relates to a method for managing recorded program information in an optical disc device such as a DVD-Recorder.

Recently, optical disc devices, such as DVD recorders, which record and store high-quality video data and high-quality audio data for a long time, have been developed and commercialized. As illustrated in FIG. (1), A / V input section (2), MPEG encoder (3), PGCI generation engine (4), optical disk recording section (5), optical disk (6), PGCU reading engine (7), optical disk reading section (8), The MPEG decoder 9, the OSD generator 10, the video output unit 11, the audio output unit 12, and the like may be included.

On the other hand, the A / V input section 2 converts the input analog video and audio signals into digital video and audio data, and the MPEG encoder 3 encodes them into an MPEG data stream suitable for recording. The optical disc recording section 5 records the encoded MPEG data stream on the optical disc 6 in real time.

The recording position information of the MPEG data stream recorded on the optical disc 6 is transmitted to the PGCI generation engine 4, in which the data is not recorded on the optical disc. If the type of optical disc is DVD-R, DVD + R, or DVD + RW, a VMGI (Video Management Information) table, which is navigation information conforming to the DVD Video standard, is configured. Configure the following RTR_VMGI (Realtime_VMGI) table.

On the other hand, if the optical disc is a DVD-RW, it follows the format specified by the user, and if data is already recorded on the optical disc, the navigation information currently recorded on the optical disc is read, and the information is updated and recorded. Hereinafter, a process of updating and recording navigation information according to the DVD VR standard will be described in detail.

First, the video and audio data recorded on the optical disc are defined as one program from the start of recording to the end of the recording, and are divided and recorded in a plurality of video object units (VOBUs), and the PGCI generation engine 4 The optical disc recording unit 5 receives the address information of the recording unit recorded in real time and updates it as navigation information.

On the other hand, the address information is updated and recorded in the RTR_VMGI table information as shown in FIG. 2, and TM_ENT (Time Entry) information in the RTR_VMGI table information is configured as shown in FIG. In the PGCI generation engine 4, the address information VOBU_ADDR of the recording unit indicates an address of the recording unit currently being recorded in a recording object (VOB: Video Object) that is a program being recorded. Each time a unit is added, TM_ENT information is continuously updated to record address information of the recording unit.

And navigation information other than video and audio data is recorded in the program chain information (PGCI) table constructed as shown in FIG. 4, and each program information (PGI: Program Information) is shown in FIG. As shown in the figure, the PGCI Table information is updated after the recording of the program is completed, and the information of the recorded program is recorded in the program text information (PRM_TXTI) in the configuration of the PGI. .

On the other hand, in the PRM_TXTI, a recording date, a recording start time, a recording end time, and a recording channel are recorded, and a title of a program recorded by the user may be additionally input. The information recorded in the PRM_TXTI may be inputted to the OSD. The generation unit 10 outputs and displays the OSD image of the recording list as shown in FIG.

However, since the user must manually input a title for the recorded program, it is cumbersome. If the title of the recorded program is not recorded, the user cannot accurately search for the desired recorded program. Problems will arise.

Accordingly, the present invention, which was created to solve the above problems, is connected to a variety of information about recording programs recorded on an optical disc such as a rewritable DVD or a recordable DVD, etc. To provide a recording program information management method in an optical disk device for recording management on an optical disk by using electronic program guide (EPG) information received through an interface with a providing server (CP Server). will be.

1 shows a configuration of a general DVD recorder,

2 is a table illustrating real-time video management information of a general DVD.

3 is a table illustrating time entry information of a general DVD,

4 shows program chain information of a general DVD in a table form.

5 shows program information of a general DVD in the form of a table.

FIG. 6 illustrates an OSD image of a recording list displayed by a general DVD recorder.

7 shows a configuration of a DVD recorder according to the present invention,

8 illustrates an embodiment of a memory configuration for electronic program guide information according to the present invention.

9 is a flowchart illustrating an operation of a method of managing recorded program information according to the present invention;

10 and 11 illustrate an OSD image of a recording list and detailed information displayed and output by the present invention.

※ Explanation of code for main part of drawing

1: CPI 2: A / V input unit

3: MPEG encoder 4: PGCI generation engine

5: optical disc recording unit 6: optical disc

7: PGCI read engine 8: optical disc reader

9: MPEG decoder 10: OSD generator

11: video output unit 12: audio output unit

20: Internet interface 21: storage unit

22: data handler 30: content providing server

According to an aspect of the present invention, there is provided a method of managing recorded program information in an optical disk device, the method comprising: downloading electronic program guide information through an interface with a content providing server connected and connected through the Internet; Searching for navigation information corresponding to a program recorded on an optical disc among the downloaded electronic program guide information; And navigation information for reading out the searched navigation information and controlling playback of the recorded program, wherein the recording operation is recorded on the optical disc.

Hereinafter, a preferred embodiment of a method of managing recorded program information in an optical disk device according to the present invention will be described in detail with reference to the accompanying drawings.

First, in an optical disk apparatus, for example, a DVD recorder, to which the present invention is applied, as shown in FIG. 7, the CPI 1, the A / V input unit 2, the MPEG encoder 3, and the PGCI generation engine 4 are shown. , Optical disc recording unit 5, optical disc 6, PGCI reading engine 7, optical disc reading unit 8, MPEG decoder 9, OSD generating unit 10, video output unit 11, audio output unit In addition, the Internet interface 20, the storage unit 21, and the data handler 22 may be further included.

Meanwhile, the Internet interface 20 receives Electronic Program Guide information, that is, broadcast program information, provided from a Content Provide Server 30 through the Internet, and receives the storage unit ( 21, a download operation for temporarily storing the data is performed, and the data handler 22 changes the EPG information downloaded to the storage unit 21 into an appropriate form for use by the CPI 1. .

In addition, the CPI 1 controls the OSD generating unit 10 according to a user's request, and displays the EPG information downloaded from the content providing server 30 on the screen of an external connection device such as a television. The image is outputted as an OSD image on the EPG information. The EPG information includes various information such as broadcast channel, time, program name, and plot.

On the other hand, when using the EPG information, the user can use the start time and end time, title, detailed information, etc. of the program to be recorded, the EPG is updated at a predetermined time interval from the content providing server 30 After receiving and downloading the information, when the user records a broadcast program or reserves a specific program, the downloaded EPG information is recorded and managed for the recorded program.

As shown in FIG. 8, the memory type for storing the EPG information includes a month / day, a channel number, a start time, an end time, and a program title and detailed information content in each broadcast program unit. The EPG information is stored separately in the storage unit with the date as the major classification criteria, the channel as the major classification criteria, and the start time as the minor classification criteria.

In addition, even when broadcasting up to two programs per hour on any one broadcasting channel, since 24 hours X 2 programs X 256 bytes per channel, there is only 12 Kbytes of memory and can be stored. There are about 80 channels in total, so if you have 960 KByte memory capacity for EPG information per day, you can save them all. It is also possible to download and use EPG information for several days for the scheduled recording function.

The information recorded on the rewritable DVD includes physical reproduction information for reproduction, that is, video and audio data, and other information for logical operation control, that is, video and audio, according to program chain information (PGCI). The method of reproducing data and recording EPG information in the PGCI information will now be described in detail.

First, as shown in FIG. 9, when the series of program recording operations are completed, the CPI 1 operates the PGCI generation engine 4 to control playback information for controlling playback of the recorded program. After updating (S10), for example, checking the current date and time and a broadcast channel (S10), the corresponding PGI table included in the PGCI table shown in FIG. 4 is additionally updated (S12). .

On the other hand, as shown in Fig. 5, the program type information PG_TY of the PGI table is recorded as '0' which is not in the erase protection state, and the cell number information C_Ns indicates one number of cells in the PG. It is initialized to '1' indicating (S13), and in the program text PRM_TXT, the recording date, recording channel, and recording mode of the currently recorded program are recorded (S14).

The data handler 22 checks whether there is EPG information of the currently recorded program, and if there is EPG information, obtains a pointer of recording position information of the storage unit 21 in which the EPG information is stored, that is, EPG information. If a valid EPG information pointer exists at this time (S16), the title of the corresponding program is read from the EPG information stored in the storage unit, and the program is managed in the program text PRM_TXT (S17).

In addition, when there is detailed information by checking the information presence area among the EPG information (S18), an item text search (IT_TXT) table in the text data management (TXTDT_MG) information table and an item text search indicating a recording position of the item text. The pointer IT_TXT_SRP is additionally recorded (S19), and detailed information of the EPG information is recorded in the area (S20).

Meanwhile, after the item text search pointer IT_TXT_SRP and the item text IT_TXT are added, the number information of the item text search pointer recorded in the text data table information TXTDTI, and the text data management information TXTDT_MG. The last address of is updated and recorded (S21).

In addition, in the PGI added as described above, the value of the item text search pointer IT_TXT_SRPN in the PGI table is updated and recorded so that the address of the item text IT_TXT in which the detailed information is recorded (S22). Since the PGI is added, the program number information (PG_Ns) and the cell number information (C_Ns) recorded in the PGC_GI are changed and recorded (S23), and the reproduction information is corrected (S24).

Thereafter, the program information stored in the format corresponding to the RTR_VMG as described above is used as the recording program information when the reproduction operation is performed, and the OS video is reconstructed to provide the information to the user. ), The PGCI reading engine 7 is operated to read PGCI from the optical disc 6.

Then, the PGCI reading engine 7 checks how many programs are in the PGCI, and transmits the data corresponding to the number of programs to the CPI 1, and in the CPI 1, among the program information, PRM_TXTI and IT_TXT_SRPN are checked to confirm the presence or absence of additional information of the recorded program. When recording a broadcast program, it is searched whether program title information of the EPG information exists.

For example, if IT_TXT_SRPN in the PGI information is not '0x0000', the IT_TXT_SRP is determined to be the number of IT_TXT_SRP in which detailed information exists, the location of IT_TXT_SRP in the TXT_DT_MG Table is checked, and the T_TXT is referred to by referring to the address in IT_TXT_SRP. The contents are searched and the OSD generating unit 10 is controlled to display the OSD image of the recording list as shown in FIGS. 10 and 11.

On the other hand, the OS video includes a sub menu of the program list for playing each program / title input / detail information / delete. When the user selects the detailed information, the cursor moves to the right side of the program list screen. When the user stops the cursor at any one program and presses the OK button on the remote control, the text information such as the plot of the program is displayed as detailed information, so the user can display various information about the recorded programs. You can easily check the search through the SD video.

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.

According to the method of managing recorded program information in the optical disc device according to the present invention, various information about recorded programs recorded on an optical disc such as a rewritable DVD or a recordable DVD can be connected and connected through the Internet. By recording and managing on an optical disc using electronic program guide (EPG) information received through an interface with a content providing server (CP Server), a user equipped with an optical disc device such as a DVD recorder does not have to manually input recorded program information. In addition, it is a very useful invention that can easily search and confirm a variety of detailed electronic program guide information as recorded program information.

Claims (5)

A step 1 of downloading electronic program guide information through an interface with a content providing server connected and connected through the Internet; Searching for navigation information corresponding to a program recorded on an optical disc among the downloaded electronic program guide information; And And recording and recording management on the optical disc as the navigation information for reading out the retrieved navigation information and controlling the reproduction of the recorded program. The method of claim 1, The steps 2 and 3, the recording program information management method of the optical disk device, characterized in that performed automatically when the recording of the program on the optical disk. The method of claim 1, And the navigation information includes at least one or more information among a recording date, a time, a channel, a title, and details of the recording program. The method of claim 3, wherein The navigation information is recorded and managed in program information (PGI) corresponding to the recorded program, and the title and detailed information of the recorded program are recorded and managed as text information. . The method of claim 3, wherein The optical disc is a recordable DVD, and the navigation information is recorded and managed in a format corresponding to real-time video management information (RTR_VMGI).