KR970011813B1 - Method for recording and reproducing an optical disk - Google Patents

Abstract

none

Description

Recording and Playback Method of Optical Disc

1 is a block diagram showing an optical disk recording and reproducing apparatus of the present invention.

2 and 3 show a sector structure of the UTOC area of the optical disk employed in the optical disk recording / reproducing apparatus of FIG.

4 is a flowchart for explaining the operation of the recording / reproducing method of the optical disc according to the present invention.

* Explanation of symbols for main parts of the drawings

2: optical disk 4: operation panel

6: microcomputer 8: servo circuit

10: spindle motor 12: magneto-optical head

14 Encoder 16: Decoder

18: memory section 18A: TOC (UTOC) memory

20 Encoder 22 Decoder

24: analog / digital converter 26: digital / analog converter

28: display drive unit 30: display unit

The present invention relates to a recording and reproducing method of an optical disc, and more particularly, to a recording and reproducing method of an optical disc, in which a user can easily search for a desired recording content among recording contents recorded on an optical disc.

Currently, magneto-optical discs have been developed and used as optical discs capable of recording and reproducing by a user. The recording principle of the magneto-optical disk is to irradiate light on the disk surface using a laser power of approximately 4 mW to raise the temperature of the optical spot to Curie Temperature (approximately 180 °). The current flows in the direction to be written to the magnetic head of the magnetic head. Since the position of the optical spot is moved by the rotation of the disk, the portion through which the optical spot passes is cooled according to the polarity of the magnetic head to have magnetic properties. The reproducing principle irradiates light onto the disc surface using a laser power of approximately 0.6 mW, and the polarization plane of the light incident on the disc by the Kerr effect is positive or negative in accordance with the polarities N and S of the magnetic material on the disc. The light is rotated by approximately 0.2 to 0.3 degrees, reflected through the polarizing beam splitter, and is incident on two light receiving elements provided at predetermined intervals. At this time, an antiphase signal is generated in the light receiving element, and the polarities N and S of the magnetic material on the disc can be read as data corresponding to "1" or "0" based on the antiphase signal.

An optical disc recording and reproducing apparatus capable of reproducing and recording such a magneto-optical disc is used to select an optical disc 2 as a recordable and reproducible recording medium such as a magneto-optical disc and a track number (number of recorded contents) as shown in FIG. 10-key consisting of 10 number keys, a recording mode key for setting the recording mode, a playback mode key for setting the playback mode, and a TOC editing key for editing the TOC (Table Of Content) which is a management area of the optical disc. The control panel 4, the microcomputer 6 which performs a control operation by outputting a control signal to each corresponding component according to the key input from the control panel 4, and the spindle motor in accordance with the control signal from the microcomputer 6 The servo circuit 8 which performs the spindle servo operation for controlling the rotation of the rotation 10 and the transfer servo operation for controlling the transfer of the magneto-optical head 12 and the control signal of the microcomputer 6 according to the following method. Encoder 14, which encodes data from the memory unit 18 by, for example, an EFM (Eight to Fourteen Modulation) method and transmits the data to the magneto-optical head 12, and the magneto-optical head according to the control signal of the microcomputer 6 A decoder 16 which decodes the data read out from the optical recording medium 2 by, for example, the EFM method and cuts the data into the following memory section 18, in the TOC (UTOC) area of the optical disc 2; A TOC (UTOC) memory 18A for reading out and storing the stored data, and receiving and storing data with the encoder 14 and the decoder 16 in accordance with a control signal of the microcomputer 6 For example, ATRAC (Adaptive TRansform Acoustic Coding) receives an audio input signal from the memory unit 18 that receives data from the encoder 20 and the decoder 22 and the analog / digital converter 24 from the audio input terminal IN. By encoding the memory unit 18 A decoder 22 for receiving audio data from the encoder 20 and the memory unit 18 to be transmitted, decoding the data in an ATRAC scheme, and transmitting the audio data to the audio output terminal OUT through a digital / analog converter 26; In accordance with the control signal of the microcomputer 6, for example, the display unit 30 is constituted by a display driving unit 28 for driving a display unit 30 made of an LCD (liquid crystal display device) to display guide letters on the display unit 30.

Here, there exists a TOC area as a management area in the magneto-optical disc as the optical disc 2, and there is a UTOC area which is a user area in the TOC area, and the sector structure of the UTOC area is shown in FIGS. As shown. That is, the UTOC area consists of 48 clusters, one cluster consists of 36 sectors, and one sector consists of 2352 bytes. In cluster 0, sector = 0 corresponds to each track of the corresponding disk as shown in FIG. The start address and the end address are recorded. In sector = 1, the disc name or track name for each track of the disc is recorded as shown in FIG.

The above-described optical disc recording / reproducing apparatus has a TOC editing function for performing TOC editing. Among these TOC editing functions, there is a track name editing function for setting or modifying a disc name and a track (recording content) name. This track name editing function does not modify, for example, songs as recording contents recorded on the optical disc, but merely changes and records the data recorded in sector = 1 of the UTOC area into new data.

The track (recording content) name edited in this way can be viewed through the display unit 30 by the user operating a display function key for displaying the track name installed in the operation panel 4, which operation is as follows. That is, when the display function key of the operation panel 4 is pressed, the microcomputer 6 recognizes this and the UTOC area sector as shown in FIG. 3 stored in the TOC (UTOC) memory 18A of the memory unit 18 = 1. Accesses an address in which a name for each recording content (track) is recorded, sequentially reads out track name data and outputs the result to the display driver 28. Accordingly, the display driver 28 according to the input track name data. The display unit 30 is driven so that track names are sequentially displayed on the display unit 30.

As described above, when the names of recording contents (tracks) recorded on the optical disc are conventionally displayed, the names of all recording contents (tracks) are sequentially displayed. Therefore, in the case of an optical disc having a large number of recording contents, if the user does not know the number of the desired recording contents, it is troublesome to search the name of the recording contents displayed by the recording contents name display function one by one, and reproduce the desired recording contents. There was a problem that it takes a long time to use.

Accordingly, the present invention has been made in view of the above circumstances, and the recording of an optical disc capable of easily searching for a desired recording content by inputting the first character of the name of the desired recording content among the recording contents recorded on the optical disc. The purpose is to provide a method of regeneration.

In order to achieve the above object, according to the recording / reproducing method of an optical disc according to the present invention, there is provided a data recording area for recording predetermined recording data, an address area storing an address of the recording data, and a name area storing a name of the recording data. A recording and reproducing method of an optical disc for recording recorded data on a provided optical disc or reproducing recorded data, comprising: a setting step of setting a character search mode for searching for a name recorded in the name area and setting a search character; A judgment step of reading the name data recorded in the name area to determine whether it is the same as the search character; if it is determined that the same in the judgment step, the address on the optical disc corresponding to the record data for the name data is projected. A playback step of playing back recorded data; And if it is determined in the determination step that it is not the same, it comprises a repeating step of reading the next name data recorded in the name area and repeating the operation after the determination step.

According to the present invention configured as described above, in order to search for specific recording contents recorded on the optical disc, inputting the first character in the name of the recording contents searches for and reproduces the corresponding recording contents (track).

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the optical disc recording and reproducing method according to the present invention will be described in detail.

That is, the operation flow of the optical disc recording and reproducing method according to the present invention shown in FIG. 4 and the optical disc recording and reproducing apparatus of the present invention shown in FIG.

First, the microcomputer 6 (FIG. 1) determines whether the user operates the power key installed in the operation panel 4 (FIG. 1), and when the power-on state is achieved by operating the power key, the control of the servo circuit 8 is performed. The TOC (UTOC) data read out from the TOC (UTOC) area of the optical disc 2 by the magneto-optical head 12 under the TOC of the memory unit 18 via the decoder 16 is provided. (UTOC) is stored in the memory 18A. Thereafter, the microcomputer 6 determines whether the character search mode key of the operation panel 4 is operated by the user, and when the character search key is operated, the microcomputer 6 operates in the text search mode. Here, the character search mode key is for setting the character search mode for searching the corresponding record content as the first character of the record content (track) name recorded on the optical disc.

When the microcomputer 6 determines that the text search mode key has been operated, the control proceeds to the text search mode having the control flow as shown in FIG. 4. First, in step S1, the microcomputer 6 sets TOC (UTOC). ) In the memory 18A, the UTOC area sector = 0 as shown in FIG. 2 accesses the byte in which "number of sectors used " is written, and one unit bit is " 1 " in " number of sectors used " "It's a judgment. The "number of sectors used" is " 1 " when only sectors of the UTOC area are used, and " 11 " when only sectors of the UTOC area are used. When all sectors of 0, 1, 3 are used, it is " 111 ". Therefore, since the name of the recording content (track) is recorded in sector = 1 of the UTOC area, when only sector = 0 in the UTOC area where one unit bit of "number of sectors used" is "0" is used, the track (recording) is used. This is the case when the name of the content) is recorded.

If it is determined in step S1 that the one-bit bit is not "1" in the "number of sectors used", then control proceeds to step S2, where the microcomputer 6 informs the user that there is no track name. The control unit 100 reads from and outputs to the display unit 30 via the display driver 28, and then ends the control.

On the other hand, if it is determined in step S1 that the one-bit bit is " 1 " in " number of sectors used ", control proceeds to step S3 and the microcomputer 6 prompts for inputting the first character of the track name to be searched for. The character input corresponding to the first key input from the operation panel 4 is determined as a search character input after reading out from the unit 18 and outputting the display driver 28 to the display unit 30 via the medium.

Thereafter, in step S5, " 0 " is stored in the register R2 (not shown), and then the number of the pointer byte P-TNA1 in which the pointer of the first track name is stored in the register R0 (not shown) is stored in the register R0. To be stored in.

Subsequently, the pointer stored in the pointer byte P-TNA1 corresponding to the number stored in the register R0 is read in step S7, stored in the register R1, and the contents stored in the register R1 in step S8. Is determined to be "0". If the content (i.e., pointer) stored in the register R1 is "0", it is the case that the name for the recording content (track) is not set.

If the result of the determination in step S8 is "0", then control proceeds to step S14, which will be described later, and if it is determined whether or not the number of the pointer byte stored in the register R0 is the last pointer byte (TNA) number, the register in step S15. The number of pointer bytes stored in (R0) is increased by one and the process returns to the above-described step S7.

On the other hand, if the determination result of the step S8 is not "0", then control proceeds to the next step S9, where the number stored in the register R2 for the contents (that is, the pointer) stored in the register R1 ( That is, the 0) th byte is read. Here, the content recorded in the number-th byte stored in the register R2 corresponds to the name data of the track (recording content).

Then, in step S10, it is determined whether the name data read out in step S9 is blank data, in which control proceeds to step S13 if not blank data, whereas control proceeds to next step S11 if blank data. .

In step S11, the number stored in the register R2 (i.e., 0) is increased by one, the increased number is stored in the register R2 again, and then in step S12, the number stored in the register R2. Is determined to be "8", and if it is "8", the process proceeds to the next step S13. If not, the control proceeds to the above-described step S9. Here, in the loops of steps S10 to S12, the name recording area allocated to one track (recording contents) is allocated to eight bytes of bytes 0 to 7, so that once the name data read out is blank data, it is repeated up to byte 7. In order to search by, increase by 1 and exit if the increased value is 8.

In step S13, it is determined whether the name data read out in step S9 is the same as the search character input by the user's operation in step S14. If not, the control proceeds to step S14 and the register R0. It is determined whether the number of the pointer byte stored in the last pointer byte (TNA) number. In this case, the determination of step S14 is for judging whether or not all names are searched for the recorded pointer byte.

As a result of the determination in step S14, if it is not the last pointer byte (TNA) number, the number of pointer bytes stored in the register R0 in step S15 is increased by one, and the process returns to the above-described step S7. Here, the operation of step S15 is for searching for the next pointer byte.

On the other hand, as a result of the determination in step S14, if the last pointer byte (TNA) number, the control proceeds to step S16, the microcomputer 6 reads a guide message to guide the absence of the search character from the memory unit 18 to display display unit ( The control is terminated after outputting to the display unit 30 via 28).

As a result of the determination in step S13, if the name data and the search character are the same, then control proceeds to step S17, whereby the microcomputer 6 returns an address on the disc corresponding to the recorded contents (track) of the name data read out in step S9. Then, the servo circuit 8 is controlled to drive the spindle motor 10 and the magneto-optical head 12 to access the address, and then the playback operation is performed on the recorded contents (track). Here, the address on the disc corresponding to the recorded content (track) is the recorded content of the search character among the pointer bytes (P-TNO1 to P-TNO255) in which a pointer of the recorded content (track) shown in FIG. 2 is recorded. The start address and the end address which access the pointer byte corresponding to (track), read the pointer recorded there, and then read the pointer by reading the pointer.

Then, when the reproduction of the above-described searched contents (track) is finished, all the control for the playback operation and the search operation is terminated, or the recorded contents (track) which is located next to the searched contents (track) found above. Will play.

As described above, according to the present invention, in order to search for specific recording contents recorded on the optical disc, inputting the first character in the name of the recording contents enables the search and reproduction of the corresponding recording contents (track). Therefore, in the optical disc having many recording contents as in the prior art, if the user does not know the number of the desired recording contents, the trouble of searching the names of the recording contents displayed by the recording contents name display function can be eliminated. The time required for reproducing the recorded contents can be significantly reduced.

Claims (3)

Recording of an optical disc for recording recorded data or reproducing recorded data on an optical disc having a data recording area for recording predetermined record data, an address area for storing an address of the record data, and a name area for storing the name of the record data. In the reproducing method, a setting step of setting a text search mode for searching a name recorded in the name area and setting a search character, and reading name data recorded in the name area to determine whether the same as the search text. A reproducing step of protruding an address on the optical disc corresponding to the recording data for the name data and reproducing the corresponding recording data if the determination step is the same in the determination step, and the name if the determination step is not the same. Recorded in the zone And a repeating step of reading out the name data of the and repeating the operation after the determination step. The recording and reproducing method according to claim 1, further comprising the step of determining whether a name area exists in the optical disc and outputting a guide message indicating that there is no name area if it does not exist. The guide message of claim 1, wherein the repetition step includes a guide message indicating that there is no name data corresponding to the search text when it is determined that there is no same name data as the search text even when all name data recorded in the name area is read. The recording and reproducing method of the optical disc, characterized in that further comprising the step of outputting.