KR19980030581A - Memory stop and playback method when playing P.B.C in video CD player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of stopping and playing a memory during playback of a PBC (playback control) of a video compact disc player. (A) When a memory stop key signal is input, the list ID of a playing list is read and stored, and the list is played. Determining whether it is a Play List or a Selection List, (b) storing and setting the order of Play Item Numbers and data values of Play Item Numbers, and (c) storing If the data value of the play item number is less than 600, storing and setting the time data at the storage stop position in units of frames, minutes, and seconds; and (d) If the storage / play key signal is input, read the LOT.VCD file. Reading the list-offset value of the list ID and then reading the list header value to determine whether it is a play list or a select list, and (e) the corresponding lease; If is a play list, reading the data value of the previously stored play item number, and if it is a selection list, reading the data value of the play item number in the previously saved selection list, and (f) The data value of the play item number is more than 600; And if it is small, starting playback at the frame, minute and second positions stored in the step (c); otherwise, playing a segment play item corresponding to the play item number. In the player, using the disc of version 2.0, the user can smoothly perform the memory playback at the desired position during PBC playback.

Description

Memory stop and playback method when playing P.B.C in video CD player

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of stopping and playing back a video compact disc player, and more particularly, to a method of storing and restoring a memory when a playback control (PBC) function is executed.

With the development of audio and video media, optical disc players have been developed that record video and audio data on semi-permanent discs and reproduce them using light.

Such an optical disc player reproduces an image and / or audio recorded on an optical disc and outputs it through a screen and / or a speaker, and has a higher signal-to-noise ratio than conventional image and / or audio reproducing apparatus, resulting in better image quality and / or Or it can reproduce signals with sound quality, generate no noise due to irregular reproduction and modulation, very low distortion, no ghost, random access, etc. There is a trend.

In addition, such an optical disk player includes a compact disk player (CDP), a laser disk player (LDP), a compact disk graphic player (CDGP), and a video compact disk player (VCDP: video compact disk player) has been developed and widely used. Also, recently, a digital video disk (DVD) using MPEG-2 moving picture compression technology and a digital video disk player for playing the same have been developed. It is possible to record and play back gigabytes (GB) of data including moving images in an optical disc of 12 cm, such as a CD, and to make it possible to reproduce current CDs and VCDs.

On the other hand, among these optical disc players, a video compact disc (hereinafter referred to as Video C. D player) which is played in a video compact disc player (hereinafter referred to as Video C. D player) includes two versions: 1.1 disc and version 2.0 disc. There is a kind.

Among them, the version 2.0 disk is a user interactive disk, and performs a playback control (PBC) function that allows a user to step by step through a menu screen sequentially displayed according to a predetermined offset value. Data for performing such a function is recorded in the play sequence descriptor (PSD) area of the first track, and is composed of a play list and a selection list.

In addition, the video CD player has functions added for various conveniences. Among these functions, the memory reproducing function is performed according to a predetermined key signal, that is, a memory stop key signal while the user plays a predetermined optical disc. When the user inputs the memory regeneration key signal afterwards, the specific position is memorized so that playback can be resumed from the stored position according to the memory stop key signal. There is an advantage to this.

On the other hand, in order to perform memory stop and playback during playback of a version 2.0 disc with the PBC function in such a video CD player, the offset value for each menu screen is sequentially stored, unlike normal memory playback. Only when the data corresponding to the frame, minute, and second at the position where the memory stop key signal is inputted are stored and stored, it is possible to perform proper memory regeneration later.

Accordingly, the present invention has been conceived in view of the above, and an object of the present invention is to store a video CD / DVD player during PBC playback, which enables the video CD / DVD player to smoothly execute the memory playback even during PBC playback using a version 2.0 disc. It provides a method of stopping and reproducing.

According to a preferred embodiment of the present invention for achieving the above object, the storage stop position according to the storage stop key signal input during the playback control (PBC) playback through the version 2.0 disc in the video compact disc player. In the method of storing and reproducing a memory during PBC playback of a video compact disc player for storing data, and subsequently executing a memory playback according to the stored storage stop position data when a memory playback key signal is inputted, (A) The PBC playback. Stops playback when the memory stop key signal is input, reads and stores a list ID of a list currently being played, and selects whether the list is a Play List by reading List Header data of the list. Determining whether it is a selection list; and (b) the lease in step (a). If the list is a play list, the sequence number of the currently playing Play Item Number in the play list and the data value of the play item number are stored and set. If the list is a selection list, the play item number in the selection list is stored. Reading and storing a data value; and (c) a time at a position at which the storage stop key signal is input if the data value of the play item number in the play list or selection list stored in the reading (b) is less than 600; Storing and setting the data in frames, minutes, and seconds; and (d) reading a LOT.VCD file of the first track of the disc when the storage / play key signal is input, and list-offset of the corresponding list ID in the file. After reading the Offset) value, the list header value of the list is read to determine whether the list is a playlist. Determining whether the list is a play list; and (e) if the list is a play list in step (d), reading data values of play item numbers of the play item numbers in the order of play items stored in step (b); If the list is a selection list, reading the data value of the play item number in the stored selection list; and (f) if the data value of the play item number is less than 600 in the step (e); Starting playback at the frame, minute, and second position stored in the step; otherwise, playing a segment play item corresponding to the play item number.

1 is a schematic block diagram of a general video CD player for practicing the present invention.

Fig. 2 is a flowchart of a memory stop method during P.B.C playback in a video CD player according to a preferred embodiment of the present invention.

3 is a flowchart of a memory reproducing method during P.B.C reproduction in a video CD player according to a preferred embodiment of the present invention.

4 shows the structure of a play list;

5 shows the structure of a selection list;

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

10: pickup and actuator unit 20: RF signal amplification and servo signal processing unit

30: motor drive unit 40: key input unit

50: microcomputer 60: digital signal processing unit

70: MPEG decoder 80: audio signal processing unit

90: video signal processing unit 100: speaker

110: screen

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a video CD player for practicing the present invention.

As shown in FIG. 1, the video CD player for carrying out the present invention includes a pickup and actuator unit 10, an RF (radio frequency) signal amplification and servo signal processing unit 20, a motor driver 30, and a key input unit. 40, the microcomputer 50, the digital signal processor 60, the MPEG decoder 70, the audio signal processor 80, the video signal processor 90, the speaker 100, and the screen 110.

The pickup and actuator unit 10 performs an optical pickup from a disc loaded in a disc tray (not shown) and outputs an RF signal which is read accordingly.

In addition, the motor driving unit 30 drives the spindle motor (not shown) to rotate the disk, and drives the actuator unit 10 so that the pickup unit 10 performs optical pickup to read the data recorded on the disk to RF Output as a signal.

The RF signal amplification and servo signal processing unit 20 amplifies an RF signal provided from the pickup and actuator unit 10 and provides a servo control signal according to the signal to the motor driving unit so that the focus servo and the tracking servo are performed.

The digital signal processing unit 60 digitally processes the amplified RF signal provided from the RF signal amplification and servo signal processing unit 20, performs error detection and error correction, and outputs the result to the MPEG decoder 70.

The MPEG decoder 70 decodes an error corrected digital video signal and an audio signal provided from the digital signal processor 60 based on the MPEG compression format and outputs the decoded video signal to the video signal processor 90 and the audio signal processor 80. .

The audio signal processor 80 and the video signal processor 90 process the decoded audio and video signals provided from the MPEG decoder 70 and output them to the speaker 100 and the screen 110, respectively. ) And the screen 110 are displayed as an audio transmission and an image, respectively.

2 and 3 are flowcharts of a memory stop and playback method during PBC playback of a video compact disc player according to a preferred embodiment of the present invention.

Referring to FIG. 1, a memory stop and playback method during PBC playback of a video compact disc player according to the present invention shown in FIGS. 2 and 3 will be described.

On the other hand, according to the present invention, when the memory stop key signal is input from the key input unit 40 during the PBC playback, the microcomputer 50 first generates a control signal to the motor drive unit 30 to pick up and the actuator unit 10. (S20, S21) Then, the list ID value of the currently playing list is read out and stored in the built-in memory (not shown). (S23) Then, the currently playing list Structure, that is, as shown in FIG. 4, reads a list header value among contents included in the current list, and determines whether the list is a play list or a select list. $ 10 is a play list and $ 18 is a select list (S24, S25).

When the determination process of such a list is completed, when the list is a play list, the microcomputer 50 reads and stores the order number of the currently playing item and its data value among the contents included in the play list (S26). If the list is a selection list, the data value of the play item number in the selection list is read out and stored (S27). As shown in FIG. 5, since only one play item number is included in the selection list, as shown in FIG. It is not necessary to save the order of the play item number together.

When this process is performed, the microcomputer 50 compares the data value of the read play item number with 600 and determines whether the value is less than 600 (S28). If the value is greater than or equal to 600, the value represents a segment play item.

As described above, if the data value of the read play item number is less than 600, it is a value for the track or entry. Therefore, the time data at the storage location is stored and stored as the absolute time of frames, minutes, and seconds. Upon completion, data processing and processing are completed at the memory stop position (S29).

Thereafter, the microcomputer 50 determines whether the memory playback key signal is input from the key input unit 40 as shown in FIG. 3 (S30), and when the memory playback key signal is input, the LOT.VCD recorded in track 1 The file is read, the list-offset value of the corresponding list ID in the LOT.VCD file is read, and the list header value is read to determine whether the list is a play list or a select list, as described above. If the value of the header is $ 10, it is a play list, and if it is $ 18, it is a selection list (S31, S32).

When the reading of the structure of the list is completed, the microcomputer 50 reads the previously stored play item numbers when the list is a play list, and the play item number is shown in FIG. As described above, the play item number is read (S33, S34).

As described above, when the play item number is read, the microcomputer 50 compares the read play item number with 600 (S35), and if the microcomputer 50 is smaller than 600, the microcomputer 50 generates a control signal to the motor driver 30. When the memory is stopped, the pickup 10 is transferred to the stored frame, minute, and second position and playback is performed from the position (S36). If the play item number is larger than 600, the segment play item corresponding to the play item number is performed. Memory playback is performed by playing (Segement Play Item) (S37).

As described above, the present invention has an effect that a user can smoothly perform a memory playback at a desired position during PBC playback using a disc of version 2.0 in a video CD player.

Claims (1)

Stores data on the memory stop position according to the memory stop key signal input during PBC (playback control) playback through a version 2.0 disc in a video compact disc player. A memory stop and playback method during PBC playback of a video compact disc player for performing memory playback in accordance with memory stop position data, (A) When the memory stop key signal is input during the PBC playback, playback is stopped and the list ID of the currently playing list is read and stored, and the list header data of the list is read to display the playlist. Determining whether the file is a Play List or a Selection List; (B) In step (a), if the list is a play list, the sequence number of the currently playing Play Item Number and the data value of the play item number in the play list are stored and set, and the list is selected. Reading and storing a data value of a play item number in the selection list if the list; (C) If the data value of the play list number in the selection list or play list stored in step (b) is less than 600, time data at the position at which the storage stop key signal is input is expressed in units of frames, minutes and seconds. Setting up save, (D) When the memory playback key signal is input, the LOT.VCD file of the first track of the disc is read, and the list-offset value of the corresponding list ID in the file is read, and the list header value of the corresponding list is read. Determining whether the corresponding list is a play list or a selection list by reading a; (E) If the list is a play list in step (d), the data value of the play item number of the play item number of the sequence number stored in step (b) is read, and if the list is a selection list, Reading a data value of a play item number in a stored selection list; (F) If the data value of the play item number in step (e) is less than 600, playback starts at the frame, minute, and second position stored in step (c); otherwise, a sag corresponding to the play item number is started. A method of stopping and playing back a memory during PBC playback of a video compact disc player, comprising the step of playing a Segment Play Item.