JP2829923B2 - Playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus for reproducing a CD-ROM or the like in which karaoke performance data is recorded and performing a karaoke performance.

[0002]

2. Description of the Related Art Generally, in the case of a CD-ROM having a data format accessible by referring to a subcode address,
Invalid data is inserted at the beginning of the file before the valid data and at the end of the file as a margin area after the valid data so that reproduction can be started correctly even with rough access by the subcode address.

[0003]

[Problems to be Solved by the Invention] CD-ROM Disk
Pi according to the index data indicating the start address of the file obtained from the data reproduced by the reproducing device
When the backup is accessed, the invalid data in the margin area at the beginning of the file is read, and it takes extra time until the reproduction of the valid data is started. At the end of the reproduction, the invalid data after the valid data is reproduced, so that the reproduction of the next selected music cannot be immediately started.

[0004]

Means for Solving the Problems The present invention, the first round of the serial
At the time of starting the reproduction of the recording data of the recording medium, the start address of the valid data and the end address of the valid data of the file are read and recorded and stored in a non-volatile memory or the like . At the time of the subsequent reproduction, the reproduction device does not use the index data indicating the start address of the file, but reproduces according to the start address of the valid data and the end address of the valid data recorded in the nonvolatile memory or the like .

[0005]

The reproducing apparatus of the present invention can immediately start reproducing valid data in a short time without reading out invalid data in a margin area at the head of a file. in like it to end quickly play to avoid the reproduction of invalid data in the margin area of, quick to play the next selected song
It can be Ku move.

[0006]

Based on the drawings an embodiment of a reproducing apparatus of the embodiment of the present invention
To explain . FIG. 1 shows a system diagram of the reproducing apparatus of the present embodiment , FIG. 2 shows a data format diagram of a CD-ROM, and FIG.
Indicates a recording format in the nonvolatile memory. In FIG. 1, 1 is a CD-ROM stocker, 2 is a CD-ROM recording / reproducing device, 3 is a system control device,
Is a nonvolatile memory, 5 is an operation device, and 6 is a video and audio decoder. The stocker 1 has n CD-ROMs on which a plurality of karaoke audio data and karaoke video data are recorded.
ROM is stored.

The CD-ROM recording / reproducing apparatus 2 selects one of a plurality of CD-ROMs stored in the stocker 1 according to an instruction from the system controller 3 and reproduces a file of a predetermined number. , Audio data and video data are sent to the video and audio decoder 6, and TOC data and the header and subheader are sent to the system controller 3.
Is done.

[0008] The system control unit 3, the co-Controlling the entire playback apparatus, on the basis of the TOC data and header, sub-header transmitted from the CD-ROM reproducing apparatus 2, the non-volatile memory 4, and the disk number The file number, the effective data start address, and the effective data end address are recorded. If data of the corresponding disk number and file number has already been recorded in the non-volatile memory 4 at the start of reproduction, the
Controls D-ROM reproducing apparatus 2, reproduces the desired file. The operating device 5 inputs a disk number and a file number of a disk for which a karaoke performance is to be performed, that is, a song number corresponding to the number of the song to be reproduced , that is, a file number. The video and audio decoder 6 decodes the input data into a video signal and an audio signal and outputs them to output terminals T1 and T2, respectively.

FIG. 2 is a view for explaining an example of the format of a CD-ROM in which a plurality of karaoke audio data and karaoke video data are recorded. As shown in FIG. 2A, the start address of one file corresponding to one song is a normal C
D, etc., is indicated by the start address of each song in the TOC,
The end address is one block before the start address of the next song. However, only the last address of the last music piece is one block before the lead-out area start address. In addition, a predetermined number of blocks of invalid data is added as a margin area before and after the valid data in the file so that reproduction can be started correctly even with rough access by subcode address control. It indicates the start address, including.

FIG. 2B shows the format data of one block of the CD-ROM, which is composed of a header, a subheader, and a data area. The header indicates the block address, and the subheader indicates what the next data is. In the subheader, two sets of the same contents are continuously recorded in units of 4 bytes in order to increase the reliability at the time of reproduction. The second bit of the third byte of the subheader is a video flag indicating that it is video data if it is 1, and the third bit is an audio flag indicating that it is audio data if it is 1. If both bits are 0,
This indicates invalid data as a margin area inserted at the start and end of the file.

FIG. 3 shows an example of a recording format in the nonvolatile memory 4. The contents of the non-volatile memory are preset to a predetermined value, in the FF 16 in the embodiment of the present invention. Therefore, it can be seen that data has not been written yet in the case of FF16. The effective data start address and the effective data end address read from the start of reproduction are recorded for each disk number and file number. The number of files recorded on one disc is m, and the recording area is allocated.

Next, an operation example of the reproducing apparatus according to the present invention will be described with reference to the flowchart of FIG. Now, when a disk number n and a file number m (for example, the m-th song is designated) are selected by the operation device 5 for karaoke performance, the system control device 3 sends the CD-ROM recording / playback device 2 First, an instruction is issued to set the disk of the disk number n. (S1)

The nonvolatile memory 4 is searched to determine whether the effective data start address and the effective data end address of the disk number n and the file number m have already been recorded. (S2)

If the value of the corresponding area is FF16, it indicates that the data has not been recorded yet, so that the CD-ROM is used to obtain the start address and end address of the file.
The reproduction instruction by TOC is issued to the recording / reproduction device 2.
(S3)

Then, the file m obtained by TOC reproduction
And outputs the start address and end address to the CD-ROM recording / reproducing device 2 to start reproducing the file. (S4)

In this case, as shown in FIG.
Reproduction is started from invalid data having a margin . Here, in order to obtain a valid data start address, the header and subheader sent from the CD-ROM recording / reproducing apparatus 2 are monitored, and the value of the header where either the video flag or the audio flag becomes 1 is determined. , Are recorded in the nonvolatile memory 4 as valid data start addresses of the disk number n and the file number m. (S5)

Next, the header and subheader sent from the CD-ROM recording / reproducing device 2 are monitored to obtain the effective data end address, and the value of the header at which both the video flag and the audio flag become 0 is obtained. Subtract 1 from
The data is recorded in the nonvolatile memory 4 as the effective data end address of the disk number n and the file number m. (S6)

If there is a selection input on the operating device 5 and the non-volatile memory 4 is searched and the effective data start address and effective data end address of the disk number n and file number m are already recorded, The address is read (S7), and then a reproduction instruction is issued to the CD-ROM recording / reproducing device 2. (S8)

[0019]

According to the reproducing apparatus of the present invention, the effective data start address of the recording data of the recording medium reproduced once is an address.
Because it is held stored in the dress storage memory, again
In the reproduction of the data by using the effective data start address
Reproduction can be started in a short time .

[Brief description of the drawings]

FIG. 1 is a block diagram of a reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a data format diagram of a CD-ROM.

FIG. 3 is a view showing a recording format in a nonvolatile memory 4;

FIG. 4 is a flowchart for explaining the operation of the playback device of the embodiment .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CD-ROM stocker 2 CD-ROM recording / reproducing device 3 System controller 4 Non-volatile memory 5 Operating device 6 Video and audio decoder

Claims (2)

(57) [Claims] An index data such as a compact disc read only memory (CD-ROM) on which a plurality of karaoke image data and karaoke audio data are recorded.
In a reproducing apparatus for reproducing a recording medium having a gin, the reproducing apparatus reproduces data from a plurality of pieces of recording data recorded on the recording medium.
Means for designating recording data to be read, and reading the index data recorded on the recording medium.
The finger based on the read index data.
Reproducing means for reproducing the recording data designated by the setting means, and recording data recorded on the recording medium by the reproducing means.
The effective data of the recorded data is
Address storage means for acquiring and storing data start addresses
If, designated when the reproduction of the recorded data is designated by said designating means
The valid data start address of the recorded data
Valid data start address if stored in the
And reads out the recording data specified by the specifying means.
Play data from the recording medium after the effective start address
Control means for controlling the
Raw equipment. 2. Index data such as a CD-ROM (Compact Disc Read Only Memory) in which a plurality of karaoke image data and karaoke audio data are recorded.
In a reproducing apparatus for reproducing a recording medium having a gin, the reproducing apparatus reproduces data from a plurality of pieces of recording data recorded on the recording medium.
Means for designating recording data to be read, and reading the index data recorded on the recording medium.
The finger based on the read index data.
Reproducing means for reproducing the recording data designated by the setting means, and recording data recorded on the recording medium by the reproducing means.
The effective data of the recorded data is
Address to obtain the data start address
A scan memory means, designated when the reproduction of the recorded data is designated by said designating means
The valid data start address of the recorded data
Valid data start address if stored in the
And reads out the recording data specified by the specifying means.
Play data from the recording medium after the effective start address
Control means for controlling the
Raw equipment.