Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
1998-10-14
2003-01-21
Neyzari, Ali (Department: 2653)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S030040, C386S349000
Reexamination Certificate
active
06510127
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to a method for reproducing information from a rewritable optical disc. More specifically, the present invention relates to a method for reproducing multiple sessions of a rewritable optical disc without requiring the user to perform multiple key operations.
2. Description of Related Art
A multi-session rewritable optical disc is a writable optical disc having multiple-sessions in which data having many different attributes (e.g., audio, video, or text information, etc.) can be rewritten by a user.
FIG. 1
is a schematic diagram of a conventional player for reproducing data stored on a multi-session rewritable optical disc. Referring to
FIG. 1
, a pick-up
11
reads recording signals from the surface of a multi-session rewritable optical disc. A driver
13
drives both the pick-up
11
and a motor M. The R/F unit
12
filters and normalizes the signals detected by the pick-up
11
. A servo unit
20
simultaneously controls the driver
13
using an output signal from the R/F unit
12
and the rotation rate of the multi-session rewritable optical disc, and detects synchronization of the output signal from the R/F unit
12
. Based on the detected synchronization, a digital signal processor (DSP)
30
uses the signal read by the R/F unit
12
to generate an original digital signal and corresponding data. The DSP
30
outputs the corresponding data which will usually have attributes from the original data according to a data format. Typically, the corresponding data may consist of MPEG data, text data and PCM data. The corresponding data from the DSP
30
is input into an MPEG decoder
40
or an output data converter
41
, depending on the type of data. The MPEG decoder
40
decodes the data (which is in compressed form) and outputs the decoded data as moving picture data or audio data or both. The output data converter
41
converts the recovered data having PCM information or text frames into audio or character data, and outputs the converted audio or character data. A microprocessor
50
controls the overall components described. above such as the pick-up
11
, the R/F unit
12
, the driver
13
, the servo unit
20
, the DSP
30
, the MPEG decoder
40
, and the output data converter
41
, etc., according to key entry by the user. A memory
51
stores session recording information of the multi-session rewritable optical disc
10
.
In the multi-session optical disc player described above, when the multi-session rewritable optical disc
10
is initially inserted into the player, the microprocessor
50
controls the pick-up
11
via the servo unit
20
and the driver unit
13
to move to the track
0
(Lead-In region) of the disc
10
and to read the recorded session information on that track. The session information may include information such as starting and ending positions of each session, attribute information of each session (audio, video, or text information, etc.), and track number information of each session. The pick-up
11
detects the session information. The R/F unit
12
filters and normalizes the R/F signals of the session information detected by the pick-up
11
. Then, the servo unit
20
detects synchronization of the filtered and normalized signals. The DSP
30
converts the R/F signals output from the R/F unit
12
into original digital data using the detected synchronization.
The microprocessor
50
stores the information of each session included in the disc
10
into the memory
51
. When a user selectively inputs a request to play a session, the microprocessor
50
drives the driver unit
13
via the servo unit
20
to move the pick-up
11
to the start position of the selected session. After that, the microprocessor
50
reads the data in the selected session using the session information stored in the memory
51
.
The pick-up
11
reads information such as moving picture, audio, or text information from the desired track. Then, the R/F unit
12
filters and normalizes the data, and the DSP
30
recovers the filtered and normalized data using a data synchronization which is detected by the servo unit
20
. The recovered data is selectively output to the MPEG decoder
40
or to the output data converter
41
according to data attributes of the corresponding session. The compressed data input into the MPEG decoder
40
is decoded and reproduced as a moving picture, while PCM information or text frames inputted into the output data converter
41
are converted into audio signal or character.
The reproduction of the selected session will be continued until the pick-up reaches the end of the selected session or the end of the sequential data with the same attribute, assuming there is no user's request to stop during the play of the selected session. When there is a request to stop the play of the selected session, the microprocessor
50
controls the pick-up
11
via servo unit
20
and driver unit
13
. At the same time, the microprocessor stops the DSP
30
from recovering the data and finally from playing the selected or next session.
In the conventional playing method as described above, even if no user request is input to stop reproduction, reproduction of a selected session is automatically stopped when reproduction of that selected session is completed. Thus, if the user desires to play the next session having the same attribute, the user must take an additional step to request reproduction of that next session, thus burdening the user.
SUMMARY OF THE INVENTION
The present invention is directed to system that substantially obviates one or more of the problems experienced due to the above and other limitations and disadvantages of the related art.
An object of the present invention is to provide a method for reproducing multiple sessions recorded on a rewritable optical disc, such that automatic playing of subsequent sessions occurs without any additional requests by the user if those subsequent sessions have the same attribute as the first reproduced session which is previously selected for reproduction and when reproduction of the selected session is completed.
Other and further objects, features and advantages of the present invention will be set forth in the description that follows, and in part will become apparent from the detailed description, or may be learned by practice of the invention.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the present invention includes a method for reproducing plural sessions of a rewritable optical disc having at least one common attribute information which includes reading the attribute information of at least two sessions included in the optical disc, and comparing the attribute information read to determine whether reproduction of more than one of the sessions should be automatically performed.
In accordance with another aspect of the invention, a method for reproducing plural sessions of a rewritable optical disc includes receiving a selection of a session to be reproduced, reading and storing attribute information of the selected session, reproducing the selected session, determining whether the reproduction of the selected session is completed, reading attribute information of a subsequent session when reproduction of the selected session is determined to be completed, comparing the attribute information read from the subsequent session with the attribute information of the selected session, determining whether the attribute information of the subsequent session includes at least part of the attribute information of the selected session, and reproducing the subsequent session when the attribute information thereof includes at least part of the attribute information of the selected session. When the attribute information of the subsequent session includes at least part of the attribute information of the selected session, the method further includes determining whether reproduction of the subsequent session is completed, determining whether a
Birch & Stewart Kolasch & Birch, LLP
LG Electronics
Neyzari Ali
LandOfFree
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