KR19990071349A - Disc and continuous play method where the last play information is stored for continuous play - Google Patents

Abstract

Disc and a method of continuous playback are disclosed in which the last playback information for continuous playback is stored. The present invention provides position information (last playback position data) for an area where playback is stopped when the user stops playback or turns off the system when playing audio and video (A / V) data recorded on a recordable / rewritable disc. And the last play information consisting of the attributes of the A / V data (last play property) at the time of stopping playback are recorded and managed in a predetermined area on the disc, so that when the same disc is played again, playback is performed according to the last play position data of the last recorded play information recorded. By reading out the A / V data after the pause and making the A / V data read out by the last playback attribute possible, it has a sequential playback function similar to that of a video cassette recorder (VCR).

Description

Disc and continuous playback method in which the last playback information for continuous playback is stored

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of recording and reproducing with a disc as a medium, and more particularly to a disc in which the last reproducing information for continuous reproducing is stored and a method of continuously reproducing using the last reproducing information.

Unlike tape media, one of the advantages of A / V recording and reproducing apparatus using a disk is that a variety of random access is possible. For such random access, a DVD (Video Versatile Disc) -Video device, which is dedicated to playback, has a menu. Provides various information data related to. That is, as an example of a disc, according to the format of a playback-only Digital Versatile Disc (Video) -Video, various menu items, information, and navigation data structures are defined to enable the disc's attribute reading and random access. Doing.

In the case of this playback-only DVD-Video disc, the user can search for a position to be played by various menu methods and play back the A / V data recorded at this position. However, if the user stops playback at any point on the disc and plays it again, or drives the disc by "off" and then "on" the system again, the complex menu selection and fast navigation feature Playback is made from any point where playback has stopped, and can be changed by user's selection such as audio language selection, screen display mode of video data including Pan Scan, letter box, etc. Many problems may occur when continuous playback is performed by the same A / V property after the playback stop area, such as a VCR, such as the need to specify the playback property of the A / V data again.

Therefore, when using a conventional playback-only DVD-Video disc, the user stops playback in an arbitrary data area, "off" the system, and then "on" again, so that the same A / V after the data area is stopped by the user. As described above, the method of reproducing A / V data can be performed only through complicated menu selection and fast search as described above. Therefore, the same continuous playback as the VCR has a problem.

In order to solve the above problems, an object of the present invention is to provide a disc for storing the last play information composed of the position information on the play stop area and the A / V attribute at the time of stop play when play of the recorded A / V data is stopped. To provide.

Another object of the present invention is to store the last position information and the last play property of the area stopped by the operation such as stopping the play or system off when playing A / V data in a predetermined area, and playing the same disc again. The present invention provides a continuous playback method for reproducing A / V data after the reproduction stop read out according to the last position information by the last playback attribute.

In order to achieve the above object, a disc according to the present invention is a recordable / rewritable disc in which audio and video (A / V) data is recorded: the reproduction of A / V data is stopped in response to a playback stop command applied from the outside. The last play information is stored when it is stopped.

In order to achieve the above another object, the continuous reproducing method according to the present invention is a method for reproducing A / V data recorded on a recordable / rewritable disc: at the end of the recording area of the A / V data in the reproducing mode. Determining whether a playback stop command is applied before reaching the end, and when the playback stop command is applied, the last playback position information corresponding to the region where playback is stopped and the last playback property corresponding to the A / V data attribute at the time of playback stop are determined. And storing the same.

1 is a block diagram of an optical recording and reproducing apparatus to which the present invention is applied.

2 is an example of the configuration of an information file in which the last reproduction information for continuous reproduction is recorded on a disc according to the present invention.

3 is a flowchart according to an embodiment of a continuous playback method using the last playback information according to the present invention.

4 is a diagram illustrating an example in which the last reproduction information according to the present invention is displayed in a menu form.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the disc and the continuous playback method in which the last playback information for continuous playback according to the present invention will be described.

Fig. 1 is a block diagram of an optical recording / reproducing apparatus for carrying out the present invention. The optical recording / reproducing apparatus is a typical example of an A / V DVD recorder capable of recording / rewriting. It records and reproduces attributes of A / V files and A / V data, information files for random access and fast search.

In Fig. 1, in the recording mode, an AV encoder and decoder (hereinafter referred to as a codec: 102) compresses and encodes the input A / V data by a predetermined compression coding scheme, and the channel codec 104 ) Adds header data to the coded data supplied from the AV codec 102 using Error Correction Code (ECC), modulates the error corrected data by a predetermined modulation scheme, and modifies the modulated data. Occurs.

A high frequency (RF) amplifier 106 converts electrical data supplied from the channel codec 104 into an amplified optical signal. The pickup unit 108 drives a disk, records an optical signal applied from the RF amplifier 106 on a recordable / rewritable disk, and has an actuator for focusing and tracking.

The servo unit 110 performs stable servo function for controlling the pickup unit 108 by receiving information necessary for servo control from the channel codec 104 through the RF amplifier 106 and the system controller 112.

The system controller 112 controls the entire system and recognizes a playback stop key input through an interface with a user or a power off key for " off, " The last reproduction attribute, which is the reproduction attribute of the A / V data, is recorded in the information file on the disc through the above-described recording process.

On the other hand, in the playback mode, the pickup unit 108 reads out the stored data from the disk and outputs it as an optical signal. The RF amplifier 106 converts this optical signal into an electrical signal, outputs modulated data, and generates a servo signal for performing stable servo using this electrical signal.

The channel codec 104 demodulates the modulated data and removes additional data while correcting an error of the demodulated data, and the servo unit 110 uses various servo signals using the servo signal output through the RF amplifier 106. Drive to stabilize. The AV codec 102 decodes the error correction decoded A / V data transmitted from the channel codec 104 and finally outputs the decoded A / V signal.

The system controller 112 recognizes the playback mode key through the interface with the user and collects the last playback position data and the last playback attribute recorded in the information file on the disc, the pickup unit 108, the RF amplifier 106, and the channel codec 104. And A / V data from the previous paused region read out in accordance with the last playback position data by reading through the AV codec 102 and continuous playback by the last reproduced attribute at the pause of playback. .

That is, in the case of a DVD / Recorder for A / V capable of recording / rewriting shown in FIG. 1, the data on the disc is a file related to the compressed A / V data and the attributes of the A / V data as shown in FIG. And an information file that stores information data enabling random access and fast searching. Since this information file serves as playback control data at the time of A / V data playback, various information can be recorded directly on the disc according to the playback properties desired by the user.

That is, the information file designates the attributes of the A / V data at the time of recording / playback to facilitate random access and fast searching through the user interface at the time of playback. When playback is stopped by playback stop key or power off key input, the last playback position data and the last playback attribute are recorded and managed in the last playback information area in the information file, respectively, in the playback stop area and the A / V attribute at the time of playback stop. Even when the system is "on" again, the A / V data read out according to the last playback position data recorded in the last playback information area in the disc's information file is transferred by the same A / V attribute (last playback attribute) as when playback was stopped. Playback can be continued from after the playback stop area of.

Referring to the configuration of the information file according to the present invention as shown in FIG. 2, the information file for the file system may include video title management information, program management information, cell management information, and additional management information. The video title attribute for the video title management information, the program attribute for the program management information, and the cell attribute for the cell management information each include a video coding mode indicating whether the coding mode is MPEG1 or MPEG2 and a TV system mode indicating whether NTSC or PAL is used. It is included.

In addition, the last play information for continuous play is stored in the additional management information area, and the last play information includes the last play information flag, the last play attribute, the last play position start address, and other information can be recorded. have.

The last play attribute includes a screen display mode, an audio stream identifier (ID), and a caption stream ID. In addition, other attributes may be further included. In this screen display mode, the screen display mode determined by the user among the screen display modes of video data such as pan scan, letter box, and normal mode is recorded, and the audio stream ID is recorded by the user among audio streams recorded in multiple languages. The stream ID of the selected audio is recorded, and the caption stream ID selected by the user among the caption streams for a plurality of languages is recorded in the caption stream ID.

Also, the last reproduction position start address may be, for example, a pack start address including an I (intra frame) picture of the A / V data reproduced just before. In addition, a pack corresponds to a sector, which is a term of physical structure, and a pack is a term of logical structure.

That is, when reproducing the A / V data, if the stop key by the interface with the user or the reproduction stop command by the power off key is applied before reaching the end position of the recording area of the A / V data, the last play information is received. Set the flag, record the pack address containing the I picture of the A / V data just played back as the last playback position in the last playback information area of the information file, and also by the user of the audio stream recorded in multiple languages. By the user such as the subtitle stream ID selected by the user among the screen display modes selected by the user among the screen display modes of the video data such as the selected audio stream ID, pan scan, letter box, and normal mode. The reproduction attribute of the determined A / V data is recorded in the last reproduction information area of the information file as the last reproduction attribute.

The flowchart of the continuous playback method in the case of replaying the disc having the last playback position and the last playback attribute recorded therein is shown in FIG.

In Fig. 3, when the playback mode is set, the last playback information flag recorded in the information file is checked (step S1), and if this last playback information flag is set (step S2), the last playback information is read out (S3). step).

When the playback mode is set for the convenience of the user, a menu may be displayed to select a mode for playing back to the last playback position using the menu function as shown in FIG. 4.

If the last reproduction information flag is not set in step S2, the A / V attribute is read out and the A / V data is reproduced according to the A / V attribute read from the first reproduction position (step S4).

On the other hand, after performing step S3 of reading out the last playback information, it is determined whether to play by the last playback information (step S5), and continuous playback of the A / V data is performed from the last playback position after the last playback information read out. If desired, the A / V data is read out after the playback is stopped according to the last playback start address, and the read A / V data is reproduced by the last playback attribute (step S6). If it is not desired to reproduce by the last reproduction information in step S5, the flow advances to step S4 in which A / V data is reproduced at the first reproduction position according to the read A / V attribute.

If a playback stop command such as a stop key or a power off key is input by the interface with the user during A / V data playback, that is, before reaching the end position of the recording area of the A / V data (step S7), It is determined whether to record the last play information (step S8), if the last play information is to be recorded, the last play information flag is set, and the last play attribute and the last play position data are recorded in the last information area of the information file to play the last play information. Update the information (step S9). If the last reproduction information is not recorded in step S8, the last reproduction information flag and the last reproduction position data are initialized without setting the last reproduction information flag (S10).

If the playback stop command is input in step S7 of FIG. 3, the step S9 of setting the last play information flag and recording the last play attribute and the last play position data may be directly performed without performing steps S8 and S10.

Further, in the embodiment of the present invention, when the last reproduction information for continuous reproduction is recorded in an additional information area in an information file separate from the A / V file, when the A / V data and the information data are composed of one file There may be a variant of recording in the information data area. There may be further modifications in which the last reproduction information is recorded in the attribute area of the file system.

As described above, the present invention provides the position information of the A / V data that has been stopped when the playback is stopped by a playback stop command through an interface with a user during the playback of A / V data recorded on a recordable / rewritable disc. And A / V data attributes when playback is interrupted, and when the same disc is played again, A / V data after the region where playback is stopped can be played back by the properties when playback is interrupted, so that the same continuous playback function as the VCR is possible. It has the effect of having.

Claims (17)

On recordable / rewritable discs with audio and video (A / V) data recorded: And the last reproduction information is stored when the reproduction of the A / V data is stopped according to a reproduction stop command applied from the outside. 2. The last reproduction information is stored in the last reproduction information flag, the last reproduction position data which is the region information of which reproduction has been stopped, and the last reproduction attribute which is an attribute of A / V data when the reproduction is stopped. disk. 2. The disc of claim 1, wherein the last playback attribute includes a screen display mode selected by a user, an audio stream identifier, a subtitle stream identifier, and the like. 2. The disc according to claim 1, wherein the last reproduction position data is a pack start address including an intra frame picture of A / V data reproduced immediately before. 2. The disc of claim 1, wherein the last play information is stored in an information file separate from the A / V data file. The disc according to claim 1, wherein the last reproduction information is stored in an information data area for the A / V data. 2. The disc of claim 1, wherein the last play information is stored in an attribute area of a file system. In the method of reproducing A / V data recorded on a recordable / rewritable disc: (a) determining whether a reproduction stop command is applied before reaching an end position of the recording area of the A / V data in the reproduction mode; And and (b) storing the last play position information corresponding to the region where the play is stopped and the last play attribute corresponding to the A / V data attribute when the play is stopped when the play stop command is applied. The method of claim 8, (c) reproducing the read A / V data according to the last playback attribute by reading A / V data after the region where playback has been stopped according to the last play position information when the play mode for the same disc is reset; Continuous playback method further comprising. 9. The method of claim 8, wherein the last playback attribute includes a screen display mode selected by the user, an audio stream identifier, a subtitle stream identifier, and the like. 9. The method of claim 8, wherein the last reproduction position information is a pack start address including an intra frame picture of A / V data reproduced immediately before. 9. The method of claim 8, wherein the last play position information and the last play attribute are stored in an information file separate from the A / V data file. 9. The continuous playback method according to claim 8, wherein the last playback position information and the last playback attribute are stored in an information data area for the A / V data. 9. The method of claim 8, wherein the last play position information and the last play attribute are stored in an attribute area of a file system. The method of claim 9, (d) reproducing the A / V data and determining whether a reproduction stop command is applied before reaching an end position of the recording area of the A / V data; And and (e) updating the last playback position information and the last playback attribute at the time when playback is stopped when the playback stop command is applied. The method of claim 9, (f) reproducing the A / V data and determining whether a reproduction stop command is applied before reaching an end position of the recording area of the A / V data; (g) determining whether to record last reproduction information when the reproduction stop command is applied; And and (h) updating the last playback position information and the last playback attribute at the time when playback is stopped if the last playback information is to be recorded. The method of claim 16, and (i) initializing the last play position information and the last play attribute if the last play information is not recorded in step (g).