JP2002150691A - Method and device for reproducing and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display the residual time of reproducing to the end of recorded AV data during the reproducing of an SVCD. SOLUTION: An information file including overall reproducing time information of the set SVCD is read out before the start of reproducing time display processing. A leading sequence header and an SCR are acquired and an STC is matched on the basis of the SCR in a step S2. Each part of the SVCD is set corresponding to information stored in the acquired sequence header and reproducing is started from a position designated by a user in a step S3. The current STC value is acquired in a step S4. The difference between preliminarily read overall reproducing time information and the current STC value is calculated as the residual time of reproducing in a step S5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a reproducing apparatus and method, and a recording medium, and more particularly to a reproducing apparatus and method for reproducing an MPEG program stream recorded on a Super Video CD, and a recording medium.

[0002]

[Prior Art] Su is a package media distributed in Asian countries such as the People's Republic of China and the Republic of Korea.
per Video CD (hereinafter referred to as SVCD) exists. SV
CDs include MPEG (Movin), a variable-rate compression encoding system.
g Picture Experts Group) 2 recorded AV data (MPEG program stream).

[0003] By the way, during playback of AV data, a player who plays back a package medium on which AV data is recorded has a playback elapsed time indicating the time from the beginning of the AV data to the current playback position. And a function of displaying the remaining reproduction time indicating the time until the end of the AV data.

[0004] For example, in a DVD player for reproducing AV data recorded on a DVD (Digital Versatile Disc), the reproduction elapsed time and the reproduction time are determined based on the navigation information recorded on the DVD together with the AV data encoded by the MPEG2 system. The remaining time is displayed.

For example, in a CD player for reproducing a Video CD in which AV data encoded by the MPEG1 system is recorded, since the MPEG1 system has a fixed rate, information on the elapsed time of the AV data and the video CD Since the sector addresses correspond one-to-one, the elapsed reproduction time and the remaining reproduction time are displayed based on the sector addresses.

[0006]

[0005] On the other hand, SVCD includes MPEG.
AV data encoded using the two methods is recorded, but navigation information corresponding to the AV data is not recorded unlike a DVD. Also, since the SVCD records AV data encoded using the variable-rate MPEG2 system, the information on the elapsed time of the AV data and the sector address of the SVCD do not always correspond one-to-one.

[0007] Therefore, the conventional SVCD player for reproducing an SVCD has a problem that the elapsed reproduction time and the remaining reproduction time cannot be displayed based on the navigation information or the sector address of the SVCD.

[0008] Further, as a format for the SVCD, it is specified that the SCR (System Clock Reference) at the head of the MPEG program stream recorded on each SVCD is set to 0, but an SVCD that does not do so is actually used. There are many. Therefore, there is a problem that the SCR at the head of the MPEG program stream recorded on the SVCD cannot be used to calculate the remaining reproduction time.

The present invention has been made in view of such circumstances, and has as its object to be able to display the elapsed playback time of AV data and the remaining playback time until the end of AV data in an SVCD.

[0010]

According to the present invention, there is provided a reproducing apparatus comprising: first reading means for reading a data stream from a disk medium; decoding a data stream encoded by using a predetermined method; Decoding means for reproducing, extracting means for extracting a time reference value from the data stream read by the first reading means, and timing of decoding processing by the decoding means;
Adjusting means for adjusting based on the time reference signal and the time reference value extracted by the extracting means; second reading means for reading attribute information corresponding to the data stream from the disk medium; and using the time reference signal and the attribute information. It is characterized by including calculation means for calculating the remaining reproduction time, and display control means for controlling the display of the remaining reproduction time calculated by the calculation means.

[0011] The second reading means may read attribute information including at least total reproduction time information of a data stream from a disk medium.

[0012] The calculating means may further calculate the reproduction elapsed time using the time reference signal and the attribute information of the data stream. The display control means may include the reproduction elapsed time calculated by the calculation means. Can be further controlled.

According to the reproducing method of the present invention, a first reading step of reading a data stream recorded on a disk medium and decoding of a data stream encoded using a predetermined method to generate AV data. The decoding step, the extracting step of extracting a time reference value from the data stream read in the processing of the first reading step, and the timing of the processing of the decoding step are extracted by the processing of the time reference signal and the extracting step. An adjusting step of adjusting based on a time reference value, a second reading step of reading attribute information corresponding to a data stream from a disk medium, and a calculating step of calculating a remaining reproduction time using a time reference signal and the attribute information And the display of the remaining playback time calculated in the process of the calculation step. Characterized in that it comprises a Gosuru display control step.

[0014] The program of the recording medium of the present invention comprises a first reading step of reading a data stream recorded on a disk medium, and decoding of a data stream encoded by using a predetermined method to convert AV data. A decoding step to be generated, an extraction step to extract a time reference value from the data stream read in the processing in the first reading step, and a timing of the processing in the decoding step are extracted by the processing of the time reference signal and the extraction step. Adjusting based on the obtained time reference value, a second reading step of reading attribute information corresponding to the data stream from the disk medium, and calculating a remaining reproduction time using the time reference signal and the attribute information. Calculation step and remaining playback calculated in the processing of the calculation step Characterized in that it comprises a display control step of controlling the display between.

According to the reproducing apparatus and method of the present invention and the program of the recording medium, a data stream recorded on a disk medium is read, and a data stream encoded using a predetermined method is decoded to form an AV stream. Data is generated. Further, a time reference value is extracted from the read data stream, and the timing of the decoding process is adjusted based on the time reference signal and the extracted time reference value. Further, attribute information corresponding to the data stream is read from the disk medium, the remaining reproduction time is calculated using the time reference signal and the attribute information, and the display of the calculated remaining reproduction time is controlled.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A configuration example of an SVCD player to which the present invention is applied will be described with reference to FIG.

In the SVCD player, the spindle motor 2 drives the SVCD 1 to rotate. Optical pickup 3
Irradiates the SVCD 1 with laser light, generates a signal corresponding to the reflected light, and outputs the signal to the signal processing unit 4. The optical pickup 3 adjusts the focus and tracking servo operations according to the focus drive signal and the tracking drive signal input from the system controller 7.

The signal processing section 4 demodulates the signal from the optical pickup 3 and performs error correction and the like, and outputs the obtained MPEG program stream to the MPEG decoder 5. Also,
The signal processing unit 4 generates a focus error signal and a tracking error signal based on the signal from the optical pickup 3 and outputs the generated signal to the system controller 7.

The MPEG decoder 5 extracts the SCR from the MPEG program stream input from the signal processing unit 4, matches its own STC (System Time Clock), and performs MPE according to the STC.
The G program stream is decoded, and the obtained digital audio signal and digital video signal are output to an AV output unit 6.
Output to The MPEG decoder 5 also acquires a sequence header (Sequence Header) from the MPEG program stream input from the signal processing unit 4 and outputs it to the system controller 7.

The AV output section 6 converts the digital audio signal and the digital video signal from the MPEG decoder 5 into an analog audio signal and an analog video signal and outputs the analog audio signal and the analog video signal to a display or the like.

The system controller 7 controls the drive 8 to read a control program stored in the magnetic disk 9, the optical disk 10, the magneto-optical disk 11, or the semiconductor memory 12, and reads the read control program from the user. Input command, MPEG decoder 5
The entire SVCD player is controlled based on the information (TV_System, picture frame, aspect ratio, O-Matrix, etc.) stored in the sequence header supplied from.

For example, the system controller 7 generates a focus drive signal and a tracking drive signal based on the focus error signal and the tracking error signal input from the signal processing section 4 and supplies them to the optical pickup 3 so that the optical pickup 3 3 controls the focus servo and the tracking servo.

For example, the system controller 7
The playback elapsed time and the remaining playback time are calculated using the SCR and STC supplied from the MPEG decoder 5 and the like.
To be displayed.

The operation unit 13 includes a remote controller and its receiving unit, and receives a command from a user and outputs a corresponding command signal to the system controller 7. The display unit 14 displays the system controller 7
In accordance with the control from, the elapsed playback time and the remaining playback time are displayed.

Next, the reproduction time display processing of the SVCD player will be described with reference to the flowchart of FIG.

Before the reproduction time display process is started, if the SVCD to be reproduced is mounted and if the SVCD has an information file including the total reproduction time information (Total Time), the information is stored in the information file. It is assumed that the file has been read and supplied to the system controller 7.

In step S1, the system controller 7 determines whether a reproduction command has been input by the user, and waits until it determines that a reproduction start command has been input. If it is determined that the reproduction start command has been input, the process proceeds to step S2.

In step S2, the MPEG decoder 5
Acquires the sequence header and the SCR from the head of the MPEG program stream from the signal processing unit 4 under the control of the system controller 7, supplies the sequence header and the SCR to the system controller 7, and matches the STC based on the SCR.

As shown in FIG. 3, the sequence header is always located at the head of the MPEG program stream, and the sequence header is also located at an entry indicating an intermediate playback point. In some cases. Therefore, basically, as shown in FIG.
From the beginning of the EG program stream
When the SCR is acquired and the sequence header is also arranged in the entry, as shown in FIG. 5, the sequence header immediately before the reproduction start position specified by the user (for example, t in FIG. 5) is added to the SCR. May be obtained.

In step S3, the system controller 7 responds to the information (TV_System, picture frame, aspect ratio, O-Matrix, etc.) stored in the sequence header obtained by the MPEG decoder 5 in step S2, and Is set, and the reproduction is started from the position specified by the user for reproduction. In step S4, the system controller 7 acquires the current STC value from the MPEG decoder 5.

In step S5, the system controller 7 uses the leading SCR supplied from the MPEG decoder 5 in step S2 and the current STC obtained from the MPEG decoder 5 in step S4, and uses the playback elapsed time and the MPEG program stream. The remaining reproduction time until the tail is calculated and displayed on the display unit 14.

The calculation of the elapsed reproduction time and the remaining reproduction time will be specifically described. The elapsed playback time is determined in step S
In step 2, the difference between the leading SCR supplied from the MPEG decoder 5 and the current STC acquired from the MPEG decoder 5 in step S4 is calculated by appropriately converting the difference into a BCD unit system. The remaining playback time is the total playback time information (Total Time) included in the information file read when the SVCD 1 is mounted, and the MPEG decoder 5 in step S4.
Is calculated by appropriately converting the difference from the current STC acquired from the BCD unit system.

However, in step S2, the sequence header immediately before the reproduction start position designated by the user and the SCR
Is obtained, the playback elapsed time is calculated by adding the difference between the SCR and the current STC to the SCR immediately before the playback start position, and appropriately converting the SCR to a BCD unit system.

In step S6, the system controller 7 determines whether a reproduction end command has been input from the user. If it is determined that the reproduction end command has not been input, the process returns to step S4, and the subsequent processes are repeated. Thereafter, when it is determined that the reproduction end command has been input, the reproduction time display processing ends.

As shown in FIG. 6, the system controller 7 stores the SCR # 2 of the entry existing after the current
By causing the EG decoder 5 to acquire the information, and converting the difference between the SCR # 2 and the current STC into a BCD unit system as appropriate, the remaining reproduction time up to the entry existing from now on is calculated and displayed on the display unit 14. be able to.

The system controller 7 causes the MPEG decoder 5 to acquire SCRs corresponding to all the entries of the MPEG program stream, and calculates the difference between the SCRs to calculate the playback time between the entries.
The total playback time of the MPEG program stream can be calculated and displayed by adding them.

The elapsed playback time and the remaining playback time calculated by the system controller 7 are displayed on the display unit 14,
The video signal output from the MPEG decoder 5 may be superimposed on the video signal and displayed on the display.

The above-described series of processing can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, a program constituting the software can execute various functions by installing a computer built into dedicated hardware or installing various programs. It is installed from a recording medium into a possible general-purpose personal computer or the like.

As shown in FIG. 1, the recording medium is a magnetic disk 9 (including a floppy disk) on which the program is recorded and an optical disk 10 distributed separately from the computer to provide the program to the user. (CD
-ROM (Compact Disc-Read Only Memory), DVD (Digital V
ersatile Disc), magneto-optical disc 11 (MD (M
Ini Disc), or a packaged medium comprising the semiconductor memory 12 or the like, as well as a ROM or a hard disk, etc., in which the program is recorded, which is provided to the user in a state of being incorporated in the computer in advance. Is done.

In this specification, the step of describing a program recorded on a recording medium is not limited to processing performed in chronological order according to the described order, but is not necessarily performed in chronological order. Alternatively, it also includes individually executed processing.

[0041]

As described above, according to the reproducing apparatus and method of the present invention and the program of the recording medium, the reproduction remaining time is obtained by using the total reproduction time information included in the time reference signal and the attribute information corresponding to the data stream. Since the time is calculated, the remaining reproduction time until the end of the AV data can be displayed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of an SVCD player according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating SVCD playback time display processing.

FIG. 3 is a diagram for explaining SVCD playback time display processing.

FIG. 4 is a diagram for explaining SVCD playback time display processing.

FIG. 5 is a diagram for explaining SVCD playback time display processing.

FIG. 6 is a diagram illustrating SVCD playback time display processing.

[Explanation of symbols]

1 SVCD, 2 spindle motor, 3 optical pickup, 4 signal processing unit, 5 MPEG decoder, 6
AV output unit, 7 system controller, 8 drives, 9 magnetic disk, 10 optical disk, 11
Magneto-optical disk, 12 semiconductor memory, 13 operation unit, 14 display unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/92 H04N 5/92 H 5/93 5/93 Z F-term (Reference) 5C052 AA01 AC10 BB02 BB06 CC11 DD04 DD06 EE03 5C053 FA23 GA11 GB37 HA40 JA22 KA05 LA06 5D044 AB05 AB07 BC03 CC04 DE39 DE49 FG18 5D066 CA11 5D077 AA28 CA02 DC03 DC11 FA05 FA09 HC08 HC09

Claims (7)

[Claims] 1. A reproducing apparatus for reproducing AV data recorded on a disk medium, comprising: a first apparatus for reading a data stream from the disk medium;
Reading means; decoding means for decoding the data stream encoded using a predetermined method to reproduce the AV data; and a time reference value from the data stream read by the first reading means. Extraction means for extracting the timing of the decoding process by the decoding means,
A time reference signal, adjustment means for adjusting based on the time reference value extracted by the extraction means, second reading means for reading attribute information corresponding to the data stream from the disk medium, and the time reference signal And a calculating means for calculating a remaining reproduction time using the attribute information; and a display control means for controlling display of the remaining reproduction time calculated by the calculating means. 2. The reproducing apparatus according to claim 1, wherein the disk medium is a Super Video CD, and the predetermined system is an MPEG2 system. 3. The reproducing apparatus according to claim 1, wherein the time reference value is an SCR, and the time reference signal is an STC. 4. The reproducing apparatus according to claim 1, wherein the second reading unit reads the attribute information including at least total reproduction time information of the data stream from the disk medium. 5. The calculation means further calculates a playback elapsed time using the time reference signal and the attribute information of the data stream, and the display control means calculates the playback elapsed time calculated by the calculation means. The playback device according to claim 1, further comprising: a display; 6. A reproducing method for a reproducing apparatus for reproducing AV data recorded on a disk medium, comprising: a first reading step of reading a data stream recorded on the disk medium; and encoding using a predetermined method. A decoding step of decoding the data stream that has been performed to generate the AV data; an extraction step of extracting a time reference value from the data stream read in the processing of the first reading step; Adjusting the timing of the processing of the decoding step based on a time reference signal and the time reference value extracted in the processing of the extracting step; and reading attribute information corresponding to the data stream from the disk medium. A second reading step, the time reference signal and A reproduction method, comprising: a calculation step of calculating a remaining reproduction time using the attribute information; and a display control step of controlling display of the remaining reproduction time calculated in the processing of the calculation step. 7. A reproducing program for reproducing AV data recorded on a disk medium, comprising: a first reading step of reading a data stream recorded on the disk medium; A decoding step of decoding the encoded data stream to generate the AV data; an extraction step of extracting a time reference value from the data stream read in the processing of the first reading step; Adjusting the timing of the processing of the decoding step based on a time reference signal and the time reference value extracted in the processing of the extracting step; and adjusting attribute information corresponding to the data stream from the disk medium. A second reading step for reading, the time reference signal and A computer readable computer comprising: a calculating step of calculating a remaining reproduction time using the attribute information; and a display control step of controlling display of the remaining reproduction time calculated in the processing of the calculating step. Media on which various programs are recorded.