JP2005183003A - Reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operability by extracting an video from each of mounted disks to acquire a digest video listing contents of each disk. <P>SOLUTION: A reproducing apparatus which mounts a disk on which video or audio data is recorded in each of multiple mounting locations to selectively perform reproduction has a video output control means to read the video data from each of the mounted disks and to use each of the read video data to generate and output the digest video data displaying videos from each disk in a single screen. In addition, it has a fast reproduction control means to display a fast-forwarded video from the each disk in the digest video to confirm the disk contents in more detail. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a playback apparatus capable of storing and selectively playing back a plurality of CD-DA (digital audio compact disc), video CD, and the like.

A variety of so-called ROM type disk media such as CD-DA and video CD are in widespread use. In CD-DA, digital audio data is recorded so that music and the like can be enjoyed with high sound quality, and CD-G in which still image data is recorded in subcode data is also known as a kind of CD-DA. Yes.
Further, a video CD in which moving image data is recorded together with digital audio data has been developed as a kind of so-called CD-ROM.

  Also, as a playback device, a CD changer that can store not only one disc but also a plurality of discs and can selectively play back has been developed, and this CD changer has also been developed to be compatible with video CDs. Yes.

  By the way, when a plurality of discs are loaded in the disc storage unit in the video CD changer, the user often cannot know which disc has been placed in which position.

Normally, the user selects the disc to be played by specifying the storage position. For example, in the case of having a plurality of trays, if the tray number is the disk number and the user performs the playback operation of “Disk 2”, the disk mounted on the second tray is selected and played back. .
For this reason, if the user cannot recognize which disc is in which storage position, the user will feel very inconvenient during the operation.

  The present invention solves such problems, and it is preferable that the contents of a video such as a video CD be recorded, so that the video content is extracted. An object of the present invention is to obtain a digest video that displays a list of the contents of each disc and to improve the operability by allowing the user to view the digest video.

  Therefore, storage means capable of storing a plurality of disks on which video or audio data is recorded, selection means for selecting a desired disk from the plurality of disks stored in the storage means, and each of the disks stored in the storage means Reproduction means for reading out the video data from the video, video output control means for controlling the video data of each disk stored in the storage means and reproduced by the reproduction means to be displayed on the same screen, and video output control means The first operation means for selecting video data corresponding to a predetermined disk from the video data of each disk displayed on the same screen, and the video corresponding to the predetermined disk selected by the first operation means The second operating means for instructing fast-forward playback of data, and the first operating means selected according to the fast-forward playback operation of the second operating means. Control means for controlling reproduction means to perform fast-forward reproduction of video data on a predetermined disk, and the predetermined disk selected by the first operation means for video data reproduced in fast-forward by the reproduction means To be displayed in the display area corresponding to.

  The playback device of the present invention generates and outputs digest video data in which video from each stored disc is displayed within one screen, so that the user can use the digest video on the connected monitor device. There is an effect that the contents can be confirmed. As a result, the user does not hesitate to specify the disc to be reproduced, and the operability is greatly improved.

When the digest video data is output, the fast-forward playback of the disc is executed, the fast-forward playback data is incorporated into the digest video data, and the fast-forward video is output in the digest video display so that the user can check the contents of the disc in more detail in a short time. can do.
In particular, this fast-forward playback is sequentially executed for each disk, so that there is an effect that detailed contents can be confirmed for all the disks.
Further, by selecting only a specific disk and performing fast-forward playback within the digest video display, only the disk for which the user wants to confirm the contents in more detail can be confirmed in a shorter time.

Hereinafter, as an embodiment of the present invention, a reproducing apparatus capable of reproducing video / audio for a video CD and a CD-DA (digital audio CD and CD-G) will be described. Some video CDs are provided with a playback control function. In this embodiment, a playback apparatus is also provided.
The description will be given in the following order.

[I. Data structure of video CD]
1. Data form.
a. Video data.
b. Audio data.
c. Management data.
2. Track structure.
3. Sector structure.
4). Placement on disk.
5). TOC and subcode.
6). Directory structure.
7). Video CD data track.
a. PVD (Basic Volume Descriptor).
b. Video CD information.
-B1- Disc information.
-B2- Entry table.
-B3- List ID offset table.
-B4- PSD (play sequence descriptor).
* playlist.
* Selection list.
* End list.
c. Segment play item.

[II. Playback control (PBC)].
1 List structure.
2 Specific example.
[III. Configuration of playback apparatus].
1 Appearance.
2 Circuit block.

[IV. All disk digest operation].
1 First operation processing example.
2 Second operation processing example.
[V. Fast-forward operation when all disk digest is displayed].
1 First operation processing example.
2 Second operation processing example.

[I. Data structure of video CD]

1. Data format

The video CD standard applies the MPEG system standardized as a high-efficiency encoding technique, and is capable of reproducing moving images and audio of 60 minutes or more from a CD-ROM disc. This makes it useful as home software for music, movies, karaoke, etc., and can also be used for educational software, electronic publishing software, game software, etc. by combining still images.
In this video CD, moving image data is compressed by the MPEG method, and the moving image data is multiplexed and recorded on the compressed audio data. Further, management data necessary for reproduction is recorded in a predetermined area.
FIG. 13 shows the data format of a video CD (XA specification).

a. Video data

As shown in FIG. 13, 1.152 Mbit / second is assigned to video data and 64 Kbit / second to 384 Kbit / second is assigned to audio data as the image and audio recording formats. The pixel size of the video data (moving image) is 352 × 240 pixels in the case of NTSC signal (29.97 Hz) and film (23.976 Hz), and 352 × 288 pixels in the case of PAL signal (25 Hz), that is, as shown in FIG. Become.
In the NTSC system, the number of pixels of the still image is 352 × 240 pixels at the standard level and 704 × 480 pixels at the high definition level. In the case of the PAL system, the standard level is 352 × 288 pixels, and the high definition level is 704 × 576 pixels.

The compression encoding of video data (moving image) by the MPEG system is performed as follows. Assuming that the video signal before compression is the NTSC system, in the case of this NTSC system, one second is composed of a video signal of 30 frames.
In the MPEG system, each video signal (one frame) is divided into blocks in the plane direction (divided into 22 blocks in the horizontal direction and 330 blocks in the vertical 15 block division), the data of each block is DCT converted, and the number of bits is further changed. In order to reduce, requantization is performed (high frequency component is set to 0). Then, the block order is rearranged so that the blocks are zigzag from the block on the upper left of the screen of one frame, and run-length coding is performed to further compress the number of bits.

  Each frame of the video signal to be compressed in this way is very similar to the video information in the frames before and after that, and this is used to further compress the information. Are provided with three types of video data (one frame of video data). These are called an I picture (Intra Picture), a P picture (Predicted Picture), and a B picture (Bidirectionally predicted Picture).

In general, an I picture, a P picture, and a B picture are arranged as shown in FIG. 14A for each of the 30 frames per second. For example, in this case, the frames at intervals of 15 frames are I pictures I ₁ and I _2, and eight P pictures P _{1 to} P ₈ and 20 B pictures B _{1 to} B ₂₀ are respectively shown in the figure. Be placed. A section from one I picture to a frame before the next I picture is called a GOP (Group of Picture).

The I picture is normal image data encoded by DCT conversion as described above.
As shown in FIG. 14B, the P picture is generated by encoding from the nearest I picture or P picture using motion compensation. For example, P picture P ₁ is generated using I picture I ₁ , and P picture P ₂ is generated using P picture P ₁ .
Therefore, the P picture is more compressed than the I picture. In addition, since it produces | generates from the previous I picture or P picture sequentially, if an error arises, an error will propagate.

The B picture is generated using both past and future I pictures or P pictures as shown in FIG.
For example, B pictures B ₁ and B ₂ are generated using I picture I ₁ and P picture P ₁ , and B pictures B ₃ and B ₄ are generated using P picture P ₁ and P picture P ₂ .
The B picture is the most compressed data. Moreover, since it is not a data generation reference, no error is propagated.

In the MPEG algorithm, it is allowed to select the position and synchronization of the I picture, and this selection is determined from circumstances such as the degree of random access and scene cut. For example, if importance is attached to random access, at least two I pictures are required per second as shown in FIG.
Furthermore, the frequency of the P picture and B picture can be selected, and this is set according to the memory capacity of the encoding means.

Also, the encoding means in the MPEG system rearranges and outputs the video data stream so as to improve the efficiency in the decoder.
For example, in the case of FIG. 14 (a), the frame order to be displayed (decoder output order) is the same as the frame number shown at the bottom of FIG. 14 (a). A P picture that becomes a reference at an earlier time is required. For this reason, the encoder side rearranges the frame order of FIG. 14D as shown in FIG. 14E and transmits this as a video data stream.

b. Audio data

The MPEG audio data format supports a wide range of encoding speeds from 32 kbit / s to 448 Kbit / s. However, the video track after track 2 is 224 Kbit / second in consideration of simple software production and high sound quality.
The sampling frequency is 44.1 KHz as with CD-DA.

c. Management data

In addition to video data and audio data, management data for performing various controls of these reproduction operations is recorded on the video CD.
That is, as with the CD-DA, the TOC and subcode are recorded to indicate the number of tracks, the start position (absolute time) of each track, and the like.
Furthermore, track 1 is used as a video CD data track for the video CD, and various management information is recorded. The playback control operation described later is also realized using data in the video CD data track.
These management data will be described later in detail.

2. Track structure

For example, the data structure of a track on which video and audio data, which are unit data of one song in music, is recorded as shown in FIG.
Assuming that the search is performed by track number like CD-DA, a pause margin of 150 sectors is set at the head of one track.
Further, the 15 sectors following the pause margin are used as a front margin, and the last 15 sectors of the track are used as an empty data area as a rear margin.

An MPEG data area is defined between the front margin and the rear margin. In the MPEG data area, as shown in FIG. 16B, the sector V, which is video data, and the sector A, which is audio data, are arranged in an average ratio of 6: 1, and are multiplexed in a time division manner by interleaving. Will be recorded.

3. Sector structure

FIG. 17 shows the structure of a sector which is one data unit in a track.
FIG. 17A shows the basic structure of the sector.
One sector is formed by a pack of 2324 bytes comprising a pack header and pack data.
A 12-byte pack header is provided at the head of the sector, and the remaining 2312 bytes are set as one packet.
The pack header is provided with a 4-byte pack start code, followed by a 5-byte system clock reference (SCR), and finally a 3-byte MUX rate.

The system clock reference (SCR) is a code meaning a kind of absolute time, and a PTS (Presentation Time Stamp: image output start time) to be described later is determined based on the SCR.
This SCR is SCR (i) = C + i * 1200. i is the index number of the sector in the video data stream, and is set to “0” in the front front margin portion. C is a constant and is always “0”. 1200 is the value when the system clock is 90 KHz in the 75 Hz sector (90000/75 = 1200).
This pack header is provided in all sectors V of the video data.

Such a pack header is provided in a sector constituted by one pack. When the sector is a sector for recording video data, a 2312-byte packet following the pack header is shown in FIG. 17B as an example. Configured as follows.
First, a packet header is provided in 18 bytes following the pack header.
The first 3 bytes of the packet header are used as a packet start code. A 1-byte ID, a 2-byte packet length, a 2-byte STD (system target decorder), a 5-byte PTS, and a 5-byte DTS (decoding time stamp) are recorded. The PTS that is the image output start time is set so as to be synchronized with the audio data. DTS indicates a decoding start time.

The 2294 bytes following the packet header are used as a video packet, and actual video data is recorded. That is, as described above, a video data stream based on an I picture, P picture, and B picture is recorded.
In the first video sector in the section where the video sectors are continuous, the video packet is thus 2294 bytes, but in subsequent video sectors, STD in the packet header can be omitted, and the video packet is 2296 bytes. To be expanded.

When the sector is a sector for recording audio data, a packet of 2312 bytes following the pack header is configured as shown in FIG. 17C as an example.
First, as with the video sector, a packet header is provided following the pack header. This packet header includes a 3-byte packet start code, 1-byte I
D, 2 bytes of packet length, 2 bytes of STD, 5 bytes of PTS, 13 bytes.
Digital audio data compressed by allocating 2279 bytes as audio packets is recorded. A 20-byte free area is added to the end of the audio packet to form one pack (one sector) of 2324 bytes.

The sector is configured as described above, and time information for synchronization is SCR, DTS, and PTS. That is, since the video sector V and the audio sector A are arranged in time series in one track as shown in FIG. 16 (b), it is necessary to establish this synchronization. DTS and PTS are used.
That is, the time at which decoding of a video packet or an audio packet is started in the DTS in each sector using the SCR as a reference clock is indicated. Furthermore, the time at which the output (display or audio output) is performed with the PTS is indicated.
As described above, the video sector and the audio sector are configured to be synchronized with each other based on the time information.

3. Placement on disk

The structure of the CD-DA and video CD on the disk is shown in FIG.
In the CD-DA, as shown in FIG. 18A, a lead-in area is provided on the innermost circumference side of the disc, and TOC data is recorded here. As the TOC data, the start position of each track, the number of tracks, the performance time, and the like are recorded.
Following the lead-in area, track data is recorded as tracks # 1 to #n, and a lead-out area is provided at the outermost peripheral position. In each track, digital audio data with 16-bit quantization at 44.1 KHz sampling is recorded together with subcode data.

On the other hand, the structure of the video CD on the disc is shown in FIG.
In the case of a video CD, a lead-in area is provided on the innermost circumference side of the disc, and TOC data is recorded, as in CD-DA. Tracks # 1 to #n are recorded following the lead-in area, and a lead-out area is provided at the outermost peripheral position.

However, in the case of a video CD, track # 1 is not used for recording actual video or audio data as the first track, but is used as a video CD data track.
The actual video / audio data is recorded on track # 2 to track #n. That is, track # 2 to track #n are configured as shown in FIG. 16 by the video sector and audio sector as described in FIG.
In the case of a video CD, a track on which only audio data is recorded can be provided. In that case, 16-bit quantized digital audio data is recorded with the same 44.1 KHz sampling as in the CD-DA.

  Note that the maximum number of tracks is 99 for both CD-DA and video CD. Therefore, a maximum of 99 songs can be recorded in the case of CD-DA, and a maximum of 98 sequences can be recorded in the case of a video CD. A sequence is a continuous segment of a moving image. For example, when an image such as karaoke is recorded, one song (one track) is one sequence. In the case of a movie, one disc is usually one sequence. It becomes.

As shown in the lower part of FIG. 18B, the video CD data track using the track # 1 includes a PVD (basic volume descriptor), a karaoke basic information area, a video CD information area, a segment play item area, and other files ( CD-I application program etc. are prepared. These will be described later.

5). TOC and subcode

The TOC and subcode recorded in the lead-in area in the video CD and CD-DA will be described.
The minimum unit of data recorded in the video CD and CD-DA is one frame. One block is composed of 98 frames.

The structure of one frame is as shown in FIG.
One frame is composed of 588 bits, with the first 24 bits being the synchronization data and the subsequent 14 bits being the subcode data area. After that, data and parity are arranged.

The frame having this configuration is composed of 98 frames to form one block, and the subcode data extracted from the 98 frames is collected to form one block of subcode data as shown in FIG.
The subcode data from the first and second frames (frame 98n + 1, frame 98n + 2) at the head of the 98 frames is a synchronization pattern. In the third frame to the 98th frame (frame 98n + 3 to frame 98n + 98), 96-bit channel data, that is, subcode data of P, Q, R, S, T, U, V, and W is formed. .

Of these, the P channel and the Q channel are used for access management. However, the P channel only shows a pause portion between tracks, and finer control is performed by the Q channel (Q _{1 to} Q ₉₆ ). The 96-bit Q channel data is configured as shown in FIG.

First, 4 bits of Q _{1 to} Q ₄ are used as control data and used for the number of audio channels, emphasis, CD-ROM identification, and the like.
That is, 4-bit control data is defined as follows.
"0 ***" ... 2 channel audio "1 ***" ... 4 channel audio "* 0 ***" ... CD-DA
"* 1 **" ... CD-ROM
"*** 0 *" ... Digital copy not possible "** 1 *" ... Digital copy allowed "*** 0" ... No pre-emphasis "*** 1" ... Pre With emphasis

Next 4 bits of Q ₅ to Q ₈ are an address, which is the control bit in the sub-Q data.
If this address 4 bits are "0001", followed by Q ₉ sub-Q data to Q ₈₀ indicates that the audio Q data, and if it is "0100", the subsequent Q ₉ to Q ₈₀ sub It indicates that the Q data is video Q data.
Q _{9 to} Q ₈₀ are 72-bit sub-Q data, and the remaining Q _{81 to} Q ₉₆ are CRC.

In the lead-in area, the sub-Q data recorded there is TOC information.
In other words, the 72-bit sub Q data of Q _{9 to} Q ₈₀ in the Q channel data read from the lead-in area has information as shown in FIG. The sub-Q data has 8-bit data.

First, the track number is recorded. In the lead-in area, the track number is fixed to “00”.
Subsequently, POINT (point) is described, and further, MIN (minute), SEC (second), and FRAME (frame number) are indicated as the elapsed time in the track.
Further, PMIN, PSEC, and PFRAME are recorded. The meaning of PMIN, PSEC, and PFRAME is determined by the value of POINT.

  When the value of POINT is "01" to "99", the value means a track number. In this case, in PMIN, PSEC, and PFRAME, the start point (absolute time address) of the track number is a minute ( PMIN), second (PSEC), and frame number (PFRAME).

When the value of POINT is “A0”, the track number of the first track is recorded in PMIN. Further, CD-DA, CD-I, and CD-ROM (XA specification) are distinguished by the value of PSEC.
When the value of POINT is “A1”, the track number of the last track is recorded in PMIN.
When the value of POINT is “A2”, the start point of the lead-out area is indicated as an absolute time address in PMIN, PSEC, and PFRAME.

For example, in the case of a disc on which 6 tracks are recorded, data is recorded as such TOC by sub-Q data as shown in FIG.
As shown in FIG. 23, the track numbers TNO are all “00”.
Block NO. Indicates the number of one unit of sub-Q data read as block data of 98 frames as described above.
Each TOC data has the same contents written over three blocks.
As shown in the figure, when POINT is “01” to “06”, the start points of track # 1 to track # 6 are indicated as PMIN, PSEC, and PFRAME.

  When POINT is “A0”, “01” is indicated as the first track number in PMIN. Further, when the disk is identified by the value of PSEC and this disk is a CD-ROM (XA specification), PSEC = “20” as shown in the figure. “00” for CD-DA and “10” for CD-I.

Then, the track number of the last track is recorded in PMIN at the point value “A1”, and the start point of the lead-out area is indicated at PMIN, PSEC, and PFRAME at the point “A2”.
After block n + 27, the contents of blocks n to n + 26 are repeatedly recorded.

In the tracks # 1 to #n and the lead-out area, the sub-Q data recorded therein has the information shown in FIG.
First, the track number is recorded. That is, each of the tracks # 1 to #n has a value of “01” to “99”. In the lead-out area, the track number is “AA”.
Subsequently, information that can further subdivide each track is recorded as an index.

Then, MIN (minute), SEC (second), and FRAME (frame number) are indicated as the elapsed time in the track.
Further, absolute time addresses are recorded as minutes (AMIN), seconds (ASEC), and frame numbers (AFRAME) as AMIN, ASEC, and AFRAME.

6). Directory structure

FIG. 19 shows the directory structure of the video CD.
In the video CD shown in FIG. 18B, the directory structure requires a video CD directory, MPEG audio / video, CD-DA, segment, CD-I, karaoke, and EXT as shown in FIG.
The video CD directory is recorded in the video CD information area in track # 1 in FIG. 18B, and is provided with disc information, an entry table, a list ID offset table, and a play sequence descriptor. Each of these will be described later.

  MPEG audio / video is audio / video sequence data. That is, a video CD capable of recording up to 99 tracks has a maximum of 98 sequence data from track # 2 to track # 99.

  A segment is a segment play item # 1 to # 1980 that can be recorded in a maximum of 1980 units, and is recorded in the segment play item area in the track # 1.

Further, the CD-I application program in the track # 1 has its directory file incorporated in the directory structure as CD-I, and when the karaoke basic information area is used, the directory file becomes karaoke. Built into the directory structure.
When providing a track in which only audio data is recorded, the directory file is incorporated in the directory structure as CD-DA, and PSD_X. VCD and LOT_X. When VCD is used, the directory file is incorporated into the directory structure as EXT.

7). Video CD data track

In the video CD, as described above, the track # 1 is used as the video CD data track.
As described above with reference to FIG. 18, PVD (basic volume descriptor), karaoke basic information area, video CD information area, segment play item area, and other files (CD-I application program, etc.) are stored in this area. Provided.

As shown in FIG. 18B, the PVD is arranged at a position from the absolute time address 00:02:16 (minute / second / frame) on the disk.
The karaoke basic information area is arranged at a position from the absolute time address 00:02:16.
The video CD information area is arranged at a position from the absolute time address 00:04:00.
The segment play item area is arranged from the position shown in the video CD information area, and the CD-I application program is arranged from the position shown in the PVD.

a. PVD (basic volume descriptor)

The structure of the PVD (basic volume descriptor) arranged at the position from the absolute time address 00:02:16 on the disk is as shown in FIG.
First, data “CD001” is recorded as a volume structure standard ID. Subsequently, a system identifier, a volume identifier, the number of album volumes, and an album set sequence number are recorded. One album may be composed of one disc or a plurality of discs, and the number of volumes of the album is the number of discs in the one album. The number of discs among them is the album set sequence number.

The logical block size, path table, path table address, and root directory record are recorded.
Also, a disc title is recorded as an album recognizer, followed by an issuer and author name.
Further, an application name of CD-I is recorded as an application identifier.
Subsequently, the copyright file name, summary file name, catalog file name, production date / time, modification date / time, expiration date / time, valid date / time, file structure standard version number, and finally the XA label code are recorded.

b. Video CD information

Video CD information is recorded from the absolute time address 00:04:00 on the disc.
As the video CD information, disc information, an entry table, a list ID offset table, and a play sequence descriptor (PSD) are provided as shown in FIG. These are the file structures in the video CD directory shown in FIG.

The disc information is arranged from the absolute time address 00:04:00 which is the head position of the video CD information.
The entry table is arranged from the absolute time address 00:04:01.
The list ID offset table is arranged at a position from the absolute time address 00:04:02 to the absolute time address 00:04:33.
The play sequence descriptor (PSD) is arranged from the absolute time address 00:04:34, and the maximum is the absolute time address 00:07:64.

-B1- Disc information

First, disc information arranged from the absolute time address 00:04:00 will be described.
The disc information area is structured as shown in FIG.

First, the system identifier of the video CD is recorded in the first to eighth bytes.
Subsequently, the version number is recorded in 2 bytes of the 9th to 10th bytes. In the case of version 2.0, it will be “$ 0200”.
Subsequently, an album identifier uniquely assigned to each disc is recorded in 16 bytes of 11th to 26th bytes.

  The number of volumes in the album is recorded in the 2nd byte of the 27th to 28th bytes, and the album set sequence number is recorded in the subsequent 2 bytes. One album may be composed of one disc or a plurality of discs, and the number of volumes of the album is the number of discs in the one album. The number of discs among them is the album set sequence number.

  The size map of the moving image track is recorded in 13 bytes from the 31st to 43rd bytes. This is data for determining whether the data for tracks # 2 to # 99 is an NTSC signal or a PAL signal. That is, the LSB of the first byte among the 13 bytes indicates the track # 2, and from this point to the bit 1 of the last byte, the data up to the track # 99 is recorded with each 1 bit. If the bit corresponding to each track is “0”, it indicates NTSC, and “1” indicates PAL.

A status flag is recorded in 1 byte at the 44th byte. In this 1 byte, bit 0 out of bit 0 to bit 7 is used as a flag of karaoke basic information.
If bit 0 is “0”, there is no karaoke basic information, and if “1”, karaoke basic information is recorded from the sector of absolute time address 00:03:00.

  The 4th byte of the 45th to 48th bytes indicates the byte size of the PSD (play sequence descriptor). As shown in FIG. 25, the PSD is recorded from the absolute time address 00:04:34 to the absolute time address 00:07:64 at the maximum. Since the byte size is variable, the byte size is indicated here.

  As will be described later, PSD is configured as a plurality of lists (selection list, play list, end list) used for playback control, and each list is recorded as PSD. When no PSD exists, that is, in the case of a disc to which no playback control function is added, these 4 bytes are set to “0”.

  The first segment address is shown in 3 bytes of the 49th to 51st bytes. As shown in FIG. 18B, it has been described that the start point of the segment play item area is recorded in the video CD information area, and these 3 bytes correspond to it.

  Although the segment play item will be described later, a maximum of 1980 segment play items can be recorded in the segment play item area shown in FIG. As each segment play item, video data and audio data used for playback control and the like are recorded.

  An offset multiplier is recorded in one byte of the 52nd byte. This is a multiplier used to calculate the address of each list in the PSD, and in this case, is fixed to “8”.

  The number of list IDs is indicated in 2 bytes of the 53rd to 54th bytes. This indicates the number of valid list IDs recorded in a list ID offset table described later.

  The number of segment play items recorded in the segment play item area is indicated in 2 bytes of the 55th to 56th bytes.

The segment play item content table is recorded in 1980 bytes of the 57th to 2036th bytes. This indicates the attribute of each segment play item recorded in the segment play item area.
In other words, segment play items can record a maximum of 1980 as # 1 to # 1980, but the segment play item content table corresponds to each segment play item # 1 to # 1980 as shown in FIG. Each attribute data is recorded.
The attribute data is defined as follows for each bit of 1 byte (bit 0 to bit 7). However, bit 6 and bit 7 are undefined.

Bit 1, bit 0
“00”: No MPEG audio data “01”: Mono audio data “10”: Stereo audio data “11”: Dual channel audio data Bit 4 to Bit 2
"000" ... No MPEG video data "001" ... NTSC standard level still image data "010" ... NTSC high definition level still image data "011" ... NTSC size video data "100" ... unused "101" ... PAL size standard level still image data "110" ... PAL size standard and high definition level still image data "111" .... PAL size video data Bit 5
“0”: Single item or top item of continuous item “1”: Second item or later of continuous items

  The 2037th to 2048th bytes of the disc information following the segment play item content table are undefined.

-B2- Entry table

In the video CD information area as shown in FIG. 25, an entry table is arranged from the absolute time address 00:04:01.
In this entry table, a predetermined point in the audio / video sequence can be entered as a start point.
Therefore, an ID indicating that the file is an entry file, a version number, the number of entries, and the like are recorded in this entry table, and a maximum of 500 entries are recorded as actual entry points. That is, entry # 0 to entry # 499 can be set.
One entry is composed of 4 bytes, of which 1 byte indicates a track number, and the remaining 3 bytes indicate a sector address, that is, ASEC, AMIN, and AFRAME.

-B3- List ID offset table

A list ID offset table is arranged in the sector from the absolute time address 00:04:02 to 00:04:33 in the video CD information area.

  Each playlist and selection list recorded in the PSD, which will be described later, has a unique list ID. This list ID offset table shows an offset amount indicating the position of each list in the PSD. When the user specifies a desired list to be played back, the video CD playback device refers to the list ID offset table to grasp the position of the specified list in the PSD and execute the list contents. Can do.

The list ID offset table is composed of a maximum of 32 sectors as shown in FIG. 28. The offset amount is indicated by 2 bytes each, and a 64K offset is expressed.
The PSD area to be described later is an absolute time address 00:04:34 up to an absolute time address 00:07:64, that is, an area of 3 frames and 31 frames at the maximum. This corresponds to 256 sectors. 256 sectors are 512K bytes.

The number obtained by multiplying the 64K offset represented by the list ID offset table by 8 is 512K bytes. “8” is the offset multiplier of the 52nd byte of the disk information of FIG.
In other words, an offset corresponds to 8 bytes per offset. Therefore, by multiplying the offset value by the offset multiplier “8”, a predetermined position in the PSD area is changed from the PSD head position (offset “0000” position) to the byte. It is a numerical value shown as a position.

First, the startup offset is recorded. This is fixed at a value of “$ 0000”.
FIG. 28 shows a case where the number of list IDs is six, and offset values are shown for list ID1 to list ID6.
Note that the offset value is always fixed to the value of “$ 0000” for the list ID 1 that is always placed at the top of the PSD.
For the unused list ID, the offset value is “$ FFFF”.

-B4- PSD (play sequence descriptor)

PSD is provided from absolute time address 00:04:34.
In this PSD, a play list, a selection list, and an end list are recorded. These lists are used for playback control, which will be described later, in which data indicating playback contents and hierarchical branches are recorded.
The playlist does not include data (selection menu) for branching to a lower hierarchy, and is a list that specifies a series of contents to be reproduced.
On the other hand, the selection list is a list including data (selection menu) for branching to a lower hierarchy.

The list to be reproduced first (play list or selection list) is set as list ID 1 and is recorded at the top position of PSD (position of offset “0000”).

* playlist

A play list designating a series of contents to be reproduced is configured as shown in FIG.
First, a 1-byte playlist header is provided to indicate that the playlist is a playlist.
Subsequently, the number of play items recorded in the play list is shown as the number of items. The play item is data indicating contents to be reproduced, and data specifying the play item as the play item # 1 number to #N number is recorded in the play list.
Following the number-off item, a list ID unique to each list is recorded in 2 bytes.

Subsequently, the previous list offset, the next list offset, and the return list offset are recorded in units of 2 bytes.
The previous list offset indicates the position (offset) of the list to be advanced when the previous operation is performed. For example, when the list is hierarchized, if the position of the list one level higher is specified by the previous list offset, the user can return to the operation state of the previous list by the previous operation.
When the previous list offset is “$ FFFF”, the previous operation is prohibited.

  The next list offset indicates the position of the list that should be continuously advanced when the reproduction operation designated by the play list is completed or when the next operation is performed. It is prohibited that the next list offset is “$ FFFF”.

  The return list offset indicates the position of the list to be advanced when a return operation is performed. For example, when the list is hierarchized, if the position of the highest list is specified by the return list offset, the user can return to the operation state by the highest list by the return operation.

Subsequently, a 2-byte playing time, a 1-byte play item wait time, and a 1-byte auto pause wait time are recorded.
The playing time indicates the number of sectors of the reproduction operation based on this playlist.

The play item wait time indicates a waiting time at the end of reproduction of each play item. A waiting time of 0 to 2000 seconds is indicated from “$ 00” to “$ FE”. In the case of “$ FF”, the operation of the user is waited.
The auto pause wait time indicates a standby time in the auto pause operation.

Finally, the numbers for play items # 1 to #N to be reproduced are indicated by 2 bytes each.
This play item number (PIN) is defined as shown in FIG.

When PIN = “0” or “1”, the play item is not played back.
When PIN = “2” to “99”, the PIN indicates a track number. For example, if PIN = “5”, the play item is a play item for reproducing track # 5.

  When PIN = “100” to “599”, the value of (PIN-100) indicates an entry in the entry table. As described above, the entry table can indicate a maximum of 500 entry points as entries # 0 to # 499, but the entry number of any of # 1 to # 500 is designated as the value of (PIN-100). The

  When PIN = “1000” to “2927”, the value of (PIN−999) indicates the segment play item number. In the segment play item area, a maximum of 1980 segment play items can be recorded as segment play items # 1 to # 1980, but any one of # 1 to # 1980 is designated as the value of (PIN-999). .

  PIN = “600” to “999” and PIN = “2980” to “$ FFFF” are undefined.

For example, it is assumed that three play items are recorded in the play list, the play item # 1 number is “04”, the play item # 2 number is “1001”, and the play item # 3 number is “102”.
Then, in the reproduction operation executed by this playlist, first, the track # 4 is reproduced, the segment play item # 2 is reproduced, and finally the reproduction from the entry point by the entry # 3 is performed.

* Selection list

The selection list is a list for reproducing the selection menu and allowing the user to select an operation to proceed, and the configuration is as shown in FIG.

First, a 1-byte selection list header is provided to indicate a selection list.
Subsequently, an unused 1 byte is left, and the number of choices in this selection list is recorded in 1 byte. The maximum number of options is 99.

Then the first number of choices is shown. This is normally “1”, but there are many options to be set. Therefore, when a plurality of selection lists are used, the second and subsequent selection lists are the first option numbers in the list.
Subsequently, in 2 bytes, a list ID unique to each list is recorded.

Subsequently, like the play list, the previous list offset, the next list offset, and the return list offset are recorded in units of 2 bytes.
That is, the previous list offset indicates the position (offset) of the list to be advanced when the previous operation is performed, and when the previous list offset is “$ FFFF”, the previous operation is prohibited.
The next list offset indicates the position of the selection list that should be continuously advanced when the next operation is performed. When there is no list to be continuously advanced, the next list offset is set to “$ FFFF”.
Further, the return list offset indicates the position of the list to be advanced when a return operation is performed.

  For example, when one selection is made in a plurality of selection lists, these are effectively used. For example, if 12 choices are set and 4 choices are set for each of 3 selection lists, the selection list is continued by the previous list offset and the next list offset so that the user can select the previous list. A desired option can be searched by the operation / next operation.

In addition, a default list offset is recorded. This indicates the position of the list to be advanced when the user performs an execution operation without making a selection.
In addition, a timeout list offset is recorded. This indicates the position of the list to be advanced when a predetermined time has passed without any input being made to the selection menu being reproduced by the user. When the timeout list offset is “$ FFFF”, when a predetermined time elapses without input, a specific option is randomly selected from the options shown in the selection menu, and the list is advanced. become.

Subsequently, the wait time until timeout is recorded. If the wait time recorded here elapses without any user input, the process proceeds to the timeout list offset.
Subsequently, the loop count and jump timing are shown. The loop count indicates the number of times the play item in this list is repeatedly played. The jump timing indicates the timing to proceed to the next list after the selection operation is performed.

Subsequently, a play item number (PIN) is shown. This indicates the play item to be reproduced in the execution state of the selection list by the definition of FIG. 30 described above. What is played back in the selection list is usually a menu screen. For this reason, video data for a menu is recorded as a segment play item, and a specific segment play item is often specified in each selection list.
For example, when menu image data corresponding to this selection list is recorded as segment play item # 4, the play item number (PIN) is “1003”.
The selection list is thus provided with one PIN.

  Finally, selection #BSN offset to selection # (BSN + NOS-1) offset is indicated by 2 bytes each for 2 bytes each to indicate an operation actually executed by selection within the options. BSN is the first number of options recorded in the 4th byte of the selection list, and NOS is the number of options recorded in the 3rd byte of the selection list. Therefore, in the selection list having options 1 to 4, selection # 1 offset to selection # 4 offset are recorded.

Each selection offset indicates the position of a list (selection list or play list) to be advanced when the option is selected.
For example, when the user selects option 2 for the menu display, it is designated to proceed to the list indicated by the selection # 2 offset.

* End list

The end list indicates the end of the application. The configuration of the end list is 8 bytes, 1 byte is the end list header, and 7 bytes are “$ 00”.

c. Segment play item

As shown in FIG. 18, a segment play item area is provided in the video CD data track. The start point of the segment play item area is indicated by 3 bytes of the 49th to 51st bytes of the disc information of FIG.

A maximum of 1980 segment play items can be recorded in the segment play item area.
Each segment play item can be freely generated from still image data, moving image data, audio data, and the like.
One segment is composed of 150 sectors. Each segment play item may be data reproduced as a single item, or may be a plurality of items continuously reproduced.

For each segment play item, as described with reference to FIG. 27, the data attribute is indicated by the segment play item content table of the 57th to 2036th bytes in the disc information.
Using this segment play item, the menu screen of the selection list can be prepared as described above.

[II. Playback Control (PBC)]

1 List structure

By providing the play list and the selection list as described above, so-called playback control (PBC) can be realized in the video CD. This is a function that realizes a video CD as simple interactive software combining a moving image, a still image, and sound.

In other words, in the segment play item area, still image data that becomes several menu screens is prepared as segment play items, and several branch playbacks are possible by the selection list, and the play items selected by the branch are playlists. To play according to.
That is, a description file hierarchized by the selection list and the play list is formed, and proceeds to a lower hierarchy according to the user's selection to execute a required reproduction operation.

As a basic list structure, a selection list is arranged at the top, and several play lists are arranged as options based on the selection list. For example, a specific playlist is designated as the selection # 1 offset to selection # 3 offset of the selection list described above.
Then, the menu display is executed in the selection list to make the user select.

For example, when the user selects selection # 3, the process proceeds to the playlist indicated by the selection # 3 offset, and the data indicated as play items # 1 number to #N number of the playlist is reproduced. For example, if track # 5 is designated as one play item # 1 number in the advanced play list, reproduction of track 5 is executed.

2 Specific examples

A specific example of such playback control (PBC) operation will be described with reference to FIGS. For example, in this example, a video CD is used as English conversation lesson software.
Assume that a list is recorded as PSD from the position of the absolute time address 00:04:34 in the video CD information area as shown in FIG.
That is, selection lists S1 and S2 and play lists P1 to P5 are recorded.

  Each list is given a list ID as shown in FIG. That is, the list ID is $ 0001 for selection list S1, $ 0002 for selection list S2, $ 0005 for playlist P1, $ 0006 for playlist P2, $ 0007 for playlist P3, $ 0003 for playlist P4, and playlist P5. Is $ 0004.

When the playback control operation is started, the selection list S1 having a list ID of $ 0001 functions first.
As an operation according to the selection list S1, reproduction is first performed using a play item number (PIN) recorded therein.
This PIN has a value of “1000”. As can be understood from FIG. 30, since “1000” is a numerical value indicating the segment play item # 1, the segment play item # 1 recorded in the segment play item area is reproduced.

The playback output of this segment play item # 1 is a still image menu screen for selecting an English lesson course as shown as PB1.
In the selection list S1, selection # 1 offset to selection # 3 offset corresponding to the three choices are recorded, and accordingly, the three choices are displayed by the reproduction output video by the segment play item # 1. In the figure, “Sel # N” indicates a selection #N offset.

The user inputs a desired option number for the video PB1.
If option number 1 is entered, the process proceeds to the list indicated by selection # 1 offset. The selection # 1 offset is “$ 0004”, and “$ 0020” is obtained by multiplying this value by the offset multiplier “8”. This is the offset byte of the selection list S2 in the PSD.

A value “1001” is indicated in the PIN in the selection list S2. That is, segment play item # 2 is shown. As a result, the segment play item # 2 is reproduced.
The playback output PB6 of the segment play item # 2 becomes a still image menu screen for selecting the lesson courses 1 to 3 in the advanced course of the English lesson.

  On the other hand, when the user inputs option number 1, the process proceeds to the list indicated by the selection # 1 offset in the selection list S2. The selection # 1 offset is “$ 0008”, and “$ 0040” is obtained by multiplying this value by the offset multiplier “8”. That is, the process proceeds to the playlist P1.

  In this playlist P1, the value of PIN # 1 is “2” and track # 2 is designated. The value of PIN # 2 is “3” and track # 3 is designated. For this reason, when proceeding to the playlist P1, the track # 2 is first reproduced and the moving image (and audio) PB7 is output. This is the video and sound of Advanced Course Lesson 1. When the reproduction of the track # 2 is finished, the track # 3 is subsequently reproduced, and the moving image (and audio) PB8 is output.

  On the other hand, when the user inputs option number 2 when the menu video PB6 is output from the selection list S2, the process proceeds to the list indicated by the selection # 2 offset in the selection list S2, that is, the play list P2.

  In this playlist P2, segment play item # 3 is designated by the value “1002” of PIN # 1. For this reason, when proceeding to the play list P2, the segment play item # 3 is reproduced and, for example, a still image (and sound) PB9 is output. For example, the advanced course lesson 2 is a lesson as a slide show.

  Further, when the user inputs option number 3 when the menu video PB6 is output from the selection list S2, the process proceeds to the list indicated by the selection # 3 offset in the selection list S2, that is, the play list P3.

  In this playlist P3, the value of PIN # 1 is “8”, and track # 8 is designated. Assume that this track # 8 is a track of only digital audio data. Then, the track # 8 is reproduced as the advanced course lesson 3 and the output PB10 of only sound is performed.

  Next, if the user inputs option number 2 which is an intermediate course at the time when the menu video PB1 is output from the first selection list S1, the list indicated by the selection # 2 offset in the selection list S1, that is, play Proceed to list P4.

In this play list P4, track # 4 is designated by PIN # 1 = "4", and track # 3 is designated by PIN # 2 = "5". Accordingly, when proceeding to the playlist P4, first, the track # 4 is reproduced and the moving image (and audio) PB2 is output. Subsequently, the track # 5 is reproduced, and the moving image (and audio) PB3 is output.
This is an intermediate course video and audio.

  If the user inputs option number 3, which is an elementary course, when the menu video PB1 is output from the first selection list S1, the list indicated by the selection # 3 offset in the selection list S1, that is, a play list Proceed to P5.

In this playlist P5, track # 6 is designated by PIN # 1 = “6”, and track # 7 is designated by PIN # 2 = “7”. Accordingly, when proceeding to the playlist P5, first, the track # 6 is reproduced and the moving image (and audio) PB4 is output. Subsequently, track # 7 is reproduced, and a moving image (and audio) PB5 is output.
This is the video and audio of the elementary course.

In addition, as described above, the playlist list, the selection list can be recorded with the previous list offset, the next list offset, and the return list offset. In addition, the selection list can be recorded with the default list offset and the timeout list offset. Can do. As a result, the progress / retreat of the list can be executed in accordance with the operation.
For example, if “$ 0004” is recorded as the previous list offset of the playlist P1, if the user performs a previous operation during the operation of the playlist P1, the offset is “$ 0004”, that is, the offset byte “$ 0020”. Return to the selection list S2.

  As in the above example, the video CD can be made simple interactive software by playback control. With such a function, the video CD can be used not only for music and movies, but also for educational, gaming, electronic publishing, etc. It will be able to handle a wide range.

[III. Configuration of playback device]

1 Appearance

Next, a description will be given of a playback apparatus according to an embodiment of the present invention, which can play back a video CD as described above.
The playback apparatus according to the embodiment is a so-called changer video CD player that can store and play back five video CDs and CD-DAs selectively.

The appearance of this reproducing apparatus is shown in FIG.
Reference numeral 1 denotes a reproducing apparatus main body.
Reference numeral 2 denotes a disk loading unit which is provided on the front panel of the reproducing apparatus 1 and from which the disk tray 30 shown in FIG. The disc tray 30 can mount five discs side by side in the plane direction, and a disc to be reproduced is selected by rotating in a roulette shape.
Reference numeral 3 denotes a display unit using a liquid crystal panel, which displays the operating state of the playback device, the mode, the number of the selected disc, the performance time, and the like.

Various keys for user operations are provided on the front panel. Reference numeral 4 denotes a power on / off key.
Reference numeral 5 denotes a reproduction key. This reproduction key also serves as a selection key (selection enter key) in the playback control operation described above.
6 is a pause key, 7 is a stop key, and 8 is an eject key.

  9 is a disk selection key. There are five disc selection keys “D1” to “D5” corresponding to five discs stored on the disc tray. For example, when the “D1” key is pressed, the disk stored in the first storage position on the disk tray is loaded at the position of the internal optical head and reproduced.

10 and 11 are keys for AMS operation, that is, 10 is a cue key in the direction of small track number (rear cue key), and 11 is a cue key in the direction of larger track number (front cue key). ). Further, the backward cue key 10 also serves as a pre-via ski and is used for a pre-via operation in the above-described playback control operation. Further, the forward cue key 11 also serves as a next key, and is used for the next operation in the playback control operation described above.
A return key 12 is used for a return operation in the playback control operation.

  Reference numeral 13 denotes a +/− selection key, which is used for a selection operation on the menu screen during the playback control operation. That is, the selection of the menu is completed by selecting an option number with the +/− select key 13 on the menu screen and performing a selection operation with the playback key 5 when a certain option number is designated. Become.

14 is a disc skip key, and 15 is a disc exchange key.
Reference numerals 16 to 19 are play mode selection keys, and 16 is a normal reproduction mode key. When a disc to which a playback control function is added is played back, when the normal playback mode key 16 is pressed, the playback control operation is automatically started.
Reference numeral 17 is a shuffle playback mode key, and 18 is a program playback mode key. Reference numeral 19 denotes a PBC off key. By the PBC off key 19, the PBC mode is turned off. That is, if the PBC off key 19 is pressed while a disc with a playback control function added is loaded, the menu playback operation in the PBC mode is shifted to a normal continuous playback operation.

  20 is a digest key, and 21 is a digest mode key. The digest key 20 can be used to display a digest video for each stored disc. The digest mode key 21 can be used to select whether a digest video for a disc with a playback control function is a menu image or a video in a track.

  22 is a bookmark registration key, and 23 is a bookmark reproduction key. When the user presses the bookmark registration key during reproduction, the reproduction point is registered. After that, the bookmark can be reproduced from that point by pressing the bookmark reproduction key 23. For example, the bookmark registration key 22 can specify and register five playback points for one disc.

  Then, when one of the registered bookmark points is selected after pressing the bookmark reproduction key 23, the reproduction is started from the reproduction point. For example, a +/− select key 13 and a select key 5 are used to select a registered bookmark point.

Reference numeral 24 denotes an infrared receiver. When a command signal is transmitted by infrared rays from a remote commander (not shown), it is received by the infrared receiving unit 24, converted into an electric signal, and taken into an internal system controller as operation information.

2 circuit blocks

FIG. 2 shows the internal configuration of the playback apparatus.
In FIG. 2, 30 is a disk tray. The disk tray 30 is provided with storage positions 30 ₁ to 30 ₅ so that _five disks can be mounted. The disk tray 30 is configured to be rotated by a motor 31, and a certain storage position 30 _x is sent to the position of the optical head 34 by this rotation operation. That is, the disk loaded at the storage position 30 _x is loaded at the position of the optical head 34. Reference numeral 32 denotes a disk position sensor, and the output of the disk position sensor 32 allows the system controller 53 to grasp the current loading state, that is, which storage position 30 _x is at the position of the optical head 34.

  The loaded disk is chucked so as to be rotated by a spindle motor 33. The disk is irradiated with laser light by the optical head 34 while being rotated by the spindle motor 33, and information is read by the reflected light.

The optical head 34 is equipped with a laser diode as laser output means, an optical system including a deflection beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens 34a is held by a biaxial mechanism 34b so that the objective lens 34a can be displaced in the radial direction of the disk and in the direction in which the objective lens 34a contacts and separates from the disk. Reference numeral 35 denotes a sled mechanism for driving the optical head 34 in the disk radial direction.

  Information detected from the disk by the optical head 34 by the reproducing operation is supplied to the RF amplifier 36. The RF amplifier 36 extracts a reproduction RF signal, a tracking error signal, a focus error signal, and the like by a calculation process of the supplied information. The extracted reproduction RF signal is supplied to the decoder unit 38, where EFM demodulation and error correction are performed. Further, the P and Q channel subcode data is extracted and supplied to the system controller 53.

  The tracking error signal and the focus error signal are supplied to the servo circuit 37. The servo circuit 37 generates various servo drive signals based on the supplied tracking error signal, focus error signal, track jump command, access command from the system controller 53, rotation speed detection information of the spindle motor 33, etc., and the biaxial mechanism 34b. The thread mechanism 35 is controlled to perform focus and tracking control, and the spindle motor 33 is controlled to a constant linear velocity (CLV).

Reference numeral 39 denotes a CD-ROM decoder. When the disc being reproduced is in the category of a so-called CD-ROM such as a video CD, the CD-ROM decoder 39 performs a decoding process according to the CD-ROM format.
Of the signals decoded by the CD-ROM decoder 39, various disk information such as the information for playback control described above is taken into the RAM 53a of the system controller 53.

The audio data decoded by the CD-ROM decoder 39 is supplied to the MPEG audio decoder 40. The MPEG audio decoder 40 uses the audio RAM 41 to decode and output a decoded audio signal at a predetermined timing.
Further, the video data decoded by the CD-ROM decoder 39 is supplied to the MPEG video decoder 42. The MPEG video decoder 42 performs decoding and decoding video signal output (RGB output) at a predetermined timing while using the video RAM 43.

Reference numeral 44 denotes a switch unit that can be switched according to the type of disc to be played. When the disc being played is a CD-DA, a digital audio signal is obtained as a playback signal by decoding processing such as EFM demodulation and CIRC by the decoder unit 38.
During CD-DA playback, the system controller 53 connects the switch unit 44 to the t ₁ terminal. Accordingly, the digital audio signal from the decoder unit 38 is converted into an analog audio signal by the D / A converter 45 and output from the audio output terminal 46 to an external device such as an amplifier circuit or an amplifier at the subsequent stage.

If the disc being reproduced is a video CD, the audio data is obtained from the MPEG audio decoder 40. During video CD playback, the system controller 53 connects the switch unit 44 to the t ₂ terminal. Accordingly, the digital audio signal from the MPEG audio decoder 40 is converted into an analog audio signal by the D / A converter 45 and is output from the audio output terminal 46 to an external device such as an amplifier circuit or an amplifier at the subsequent stage.

When playing a video CD, RGB video data is obtained as an output of the MPEG video decoder 42. This RGB video data is converted into RGB analog signals by the D / A converter 47. The RGB signal is supplied to the RGB / NTSC encoder 48, and the RGB signal is converted into an NTSC composite video signal. Then, it is supplied to the t ₂ terminal of the switch unit 49.

During video CD playback, the system controller 53 connects the switch unit 49 to the t ₂ terminal. Therefore, the NTSC composite video signal is supplied from the video output terminal 51 to the monitor device or the like via the OSD processing unit 50. Video output is executed. By the operation of the OSD processing unit 50 based on an instruction from the system controller 53, a predetermined superimpose display can be performed on the output video.

By the way, when the disc to be reproduced is CD-DA and it is CD-G, still image data is read from the R to W channels of the subcode. The still image data is supplied to the CD-G decoder 52, decoded, and output as an NTSC composite video signal (still image). During CD-DA playback, the switch unit 49 is connected to the t ₁ terminal, so that the video signal reproduced from the CD-G is supplied from the video output terminal 51 to the monitor device or the like via the OSD processing unit 50. Output is executed. Also in this case, the OSD processing unit 50 can perform predetermined superimpose display on the output video.

  Reference numeral 54 denotes a RAM, and memory data is backed up by a backup power supply 55. The RAM 54 stores data that should not be lost when the power is turned off, such as bookmark point registration data. Of course, an EEP-ROM or the like may be used.

Reference numeral 56 denotes an operation input unit provided for user operation, which corresponds to the various operation keys (5 to 23) and the infrared receiving unit 24 (and remote commander) shown in FIG. Further, when performing a reproducing operation from a disc, management information recorded on the disc, that is, TOC and subcode data is read and supplied to the system controller 53. The system controller 53 includes these management information. In response, the display unit 3 displays the playback time.

[IV. All disk digest operation]

1 First operation processing example

As described above, in the changer type reproducing apparatus 1 in which a plurality of disks can be loaded, the user can easily know what kind of disk is mounted in each of the storage positions 30 ₁ to 30 _5. This is very suitable for operation.
Therefore, in the present embodiment, a function called “all disc digest display” is added to the reproducing apparatus 1 so that the contents of each disc can be listed and discriminated by this all disc digest display.

A first operation example of this all-disc digest display operation will be described below.
As the all disc digest display, for example, as shown in FIG. 3, the discs mounted in the storage positions 30 ₁ to 30 ₅ are set as “DISC 1” to “DISC 5”, and the reproduced video from each disc is displayed in a predetermined manner. All-disc digest video pasted in the display areas AR1 to AR5 is generated and displayed on the monitor device.

The processing of the system controller 53 for the all disk digest is shown in FIG.
When the power is turned on (F100), the system controller 53 first resets the internal timer and starts counting (F101). This timer process is for performing execution discrimination of the all-disc digest operation.
If the set timer time elapses without any user operation while the power is on, the all-disc digest operation is automatically started (F102 → F106 → F107).

  If any operation is performed before the timer time elapses, it is first determined whether or not it is an all-disc digest operation (F103). The all-disc digest operation is when the user presses the digest key 20. The case where the digest key 20 is pressed is a case where the user requests an all-disc digest operation, and therefore the all-disc digest operation is started (F103 → F107).

If the operation is another operation such as reproduction or disc selection, a required operation process corresponding to the operation is executed (F104), and when the operation is completed, the process returns to step F101.
In other words, in this embodiment, the all disc digest operation is started when the user performs the all disc digest operation or when a predetermined time elapses without any operation being performed.

When the all-disc digest operation is started (F107), the system controller 53 first initializes the video RAM 43 (F108). Then, an arbitrary disk on the disk tray 30 is chucked (F109). This chucking may be performed by a disk mounted at the storage position 30 _x closest to the optical head 34 at that time.

Then, it is determined whether or not a disk exists at the storage position 30 _x (F110). The presence or absence of a disk may be provided with sensor means at the loading position. Alternatively, in this flow, the processing order is reversed, but it may be determined whether or not there is a disk depending on whether the TOC can be read after starting.

  When the disk exists and chucking is completed, the disk is started (F111). That is, the spindle motor 33 is activated to rotate the disk, and laser irradiation is started from the optical head 34. Based on the information read from the disc at this time, the disc is first discriminated (F112).

Disc discrimination is performed by the processing of FIG.
First, the lead-in area of the disc is reproduced and the TOC data is read (F201, F202). Here, as described with reference to FIG. 19, if PSEC = “20” in a block whose POINT is “A0”, the disk is a CD-ROM of XA specification. On the other hand, if PSEC = “00”, it is CD-DA, and if PSEC = “10”, it is CD-I.

  Therefore, the PSEC of the point “A0” block is confirmed (F203). If “20” is determined as the CD-ROM of the XA specification, the process proceeds to step F204. Then, the disc information data from the absolute time address 00:04:00 is read. In the disc information shown in FIG. 22, if “VIDEO CD” is recorded in the head system identifier, the disc is determined to be a video CD. In this case, the process proceeds from step F205 to F206. Then, the version number following the system identifier is confirmed.

  If the version number is “$ 0200”, the disc is version 2.00, and in this case, a playback control function may be added. In step F207, the PSD size data of the 45th to 48th bytes of the disc information is confirmed. As described above, when the playback control function is added, the size of the PSD area is shown. When the playback control function is not added, the PSD size is set to “0”.

Therefore, if the PSD size is not “0”, the disc is discriminated as a video CD with a menu with a playback control function added (F208).
On the other hand, when the PSD size is “0”, it is determined that the video CD has no playback control function, that is, no menu (F210).
If the version number is “$ 0101” in step F206, it is a disc of version 1.01, and in this case there is no playback control function added, so it is determined that the video CD has no menu (F210). ).

If it is determined in step F203 that PSEC = “20”, it is checked in step F211 whether PSEC = “00”, and in step F212, control data (Q _{1 to} Q ₄ ) in the sub-Q data is checked. Is “x0xx”. If a positive result is obtained in steps F211 and F212, it is determined that the disc is a CD-DA (F213).

  If a negative result is obtained in any of steps F211, F212, F205, and F209, it is determined that the disc is invalid because it is another type of disc that is not applicable to the playback apparatus of this embodiment (F214).

  If the disk is discriminated in the process of FIG. 7 in step F112 of FIG. 6, the process branches in steps F113 to F115. If it is an invalid disk, it is treated as if the disk is not installed.

If the disc is a video CD and is a PBC disc, that is, a video CD with a menu, the process proceeds to step F116 to determine whether or not the menu display mode is set.
In the case of a disc with a menu, the user can select whether to use a menu video as an all-disc digest image or an I picture in a track. This mode is selected by the user in advance using the digest menu key 21.

  If it is in the menu display mode, the process proceeds to step F117, where the initial menu video data is read from the disk and taken into the video RAM 43. The initial menu video data is usually video data of a segment play item specified by a selection list or a play list whose list ID is “1”.

  On the other hand, if it is not the menu display mode, the I picture is captured (F118). This is usually the first I picture of track # 2. However, instead of the first I picture of a track, it may be an I picture that becomes data after 2 to 3 seconds in the track. Further, not only track # 2, but a specific I picture in the disc may be selected.

  In step F117 or F118, when the representative video data indicating the contents of the disc is fetched from the disc with the menu, in step F121, it is indicated that the PBC disc is in the position corresponding to the disc in the all disc digest video data. Control is performed so that the characters “PBC” are displayed in an OSD manner.

  In step F122, the system controller 53 performs image reduction on the read initial menu video or I picture data by predetermined pixel thinning or the like, and uses the video data in the number of the disc currently being read in the video RAM 43. Paste to the corresponding position ARx. Since the data in the video RAM 43 is output as it is, the reduced image appears at the predetermined display position ARx on the monitor device at the time of the paste processing.

On the other hand, if it is determined in step F115 that the current disc to be read is a video CD but no menu, a representative I picture is taken from that disc (F119). This may also be the first I picture of track # 2. Or it is good also as an I picture used as data after 2 to 3 seconds within the track instead of making it the first I picture of the track.
In step F122, the system controller 53 reduces the read I picture data and pastes the video data at the position ARx corresponding to the number of the disc currently being read in the video RAM 43.

  If the disc is a CD-DA, the process proceeds from step F114 to step F120. In this case, since there is no video data in the disc, the system controller 53 sends the fixed image data for CD-DA held in the internal ROM to the video RAM 43. In step F122, the fixed video data is pasted at the position ARx corresponding to the number of the disc currently being read in the video RAM 43.

If no disc is loaded, the process proceeds to step F123. Here, the system controller 53 instructs the OSD processing unit 50 to display “NO DISC” at the display position ARx corresponding to the storage position (disc number) that is the current target on the all-disc digest display video. Let
Instead of displaying “NO DISC”, other display states such as a so-called blue screen display may be used.
If the disk is an invalid disk, the process proceeds to step F126, where the system controller 53 issues an instruction to the OSD processing unit 50, and corresponds to the storage position (disk number) that is the current target on the all disk digest display video. Display such as “DISC ERROR” is executed at the display position ARx. In the case of an invalid disk, the process may proceed to step F123 as in the case where no disk is loaded.

When this process is completed for a certain disk, the next disk is chucked in step F125. That is, the disk tray 30 is rotated, and the disk for the next storage position 30 _{x + 1} is loaded. Then, the processing from step F110 is repeated.
When the processing from step F110 is completed (F124 → YES) for _five discs (storage positions 30 ₁ to 30 ₅ ), the connected monitor device displays an all-disc digest video, for example, as shown in FIG. Is output.

FIG. 3 shows that the storage positions 30 ₁ and 30 ₃ are loaded with a PBC disk, the storage position 30 ₂ is loaded with a video CD without a PBC function, and the storage position 30 ₅ is loaded with a CD-DA. the 30 ₄ is all disc digest display of when the disk has not been installed. The digest display order is when the menu display mode is set.

Therefore, the initial menu video read from each disk is displayed at the display positions AR1 and AR3 corresponding to the disks at the storage positions 30 ₁ and 30 ₃ , that is, “DISC 1” and “DISC 3”. Furthermore, in order to indicate that the disc is a PBC disc, the characters “PBC” are displayed in the OSD display in the vicinity of the display positions AR1 and AR3.

In addition, an image as an I picture is displayed at the display position AR2 corresponding to the disk at the storage position 30 ₂ , that is, “DISC 2”.
Further, “DISC 4” is displayed as “NO DISC” at the display position AR4, and a fixed image indicating that “DISC 5” is a CD-DA and a music disc is displayed at the display position AR5. It is shown.

By executing the all-disc digest display in this way, the user can list and recognize each loaded disc. For this reason, for example, the number of the disk to be reproduced can be confirmed while viewing the all-disc digest display, and can be selected and reproduced by the disk selection key 9. Therefore, it is not necessary to perform a complicated operation of playing back each disk and searching for a desired disk without knowing the number of the disk to be reproduced.
Further, since the all disc digest display is automatically performed not only when requested by the user but also when no operation is performed, the user can check the disc contents without performing a digest operation.

  By the way, when the digest mode is not the menu display mode, an all-disc digest as shown in FIG. 4 is obtained. That is, the I picture is also displayed for “DISC 1” and “DISC 3” which are PBC discs. In this case, whether the disc is a PBC disc or not is distinguished by an OSD display “PBC”. The indication that the disc is a PBC disc is not limited to the characters “PBC”, but may be other characters or symbols.

If the user wants to display the I picture with the all-disc digest display even for the PBC disc, it can be displayed as shown in FIG. 4 by operating the digest mode key 21 to meet the user's request. can do.

2 Second operation processing example

Next, a second operation example of the same all-disc digest display operation will be described.
The difference between this operation example and the first operation example is that the menu video is always displayed for the PBC disc. Further, if the disc is a CD-DA, it may be a CD-G depending on the case. Therefore, in the case of CD-G, an all-disc digest is generated using still image data. In the case of CD-G, in order to generate an all-disc digest using the still image data, it is necessary to slightly modify the circuit block of FIG. That is, the circuit configuration is changed so that the output of the CD-G decoder 52 can be taken into the video RAM 43.

FIG. 8 shows the processing of the system controller 53 for the all-disc digest of the second operation example.
However, since steps F300 to F312 are the same as the processing from steps F100 to F112 in FIG. 6, they are only illustrated and will not be described.

  If the disk is discriminated in the process of FIG. 7 described above in step F312 of FIG. 8, the process is branched in steps F313 to F316. If it is an invalid disk, it is treated as if the disk is not installed.

  If the disc is a video CD and is a PBC disc, that is, a video CD with a menu, the process proceeds from step F315 to F317 to read initial menu video data from the disc and take it into the video RAM 43. The initial menu video data is usually video data of a segment play item specified by a selection list or a play list whose list ID is “1”.

  In step F317, when representative menu video data indicating the contents of the disc is fetched from the disc with menu, in step F318, the PBC disc is indicated at the position corresponding to the disc in the all disc digest video data. Control is performed so that the characters “PBC” are displayed in an OSD manner.

  In step F322, the system controller 53 reduces the image of the read initial menu video data by thinning out predetermined pixels or the like, and the video data in the video RAM 43 corresponds to the position ARx corresponding to the number of the disk currently being read. Paste into. Since the data in the video RAM 43 is output as it is, the reduced image appears at the predetermined display position ARx on the monitor device at the time of the paste processing.

On the other hand, if it is determined in step F315 that the disc to be read is a video CD but no menu, a representative I picture is taken from that disc (F319). That is, the first I picture of track # 2 or the I picture that becomes data 2 to 3 seconds after track # 2 is captured.
In step F322, the system controller 53 reduces the read I picture data and pastes the video data at the position ARx corresponding to the number of the disk currently being read in the video RAM 43.

  If the disc is a CD-DA, it is determined in step F316 whether the disc is a CD-G. For this determination, it is determined whether or not still image data is recorded in the RW channels as subcode data by actually reproducing the track.

  If it is not a CD-G but a normal music CD-DA, the process proceeds to step F320. In this case, since there is no video data in the disc, the system controller 53 sends the fixed image data for CD-DA held in the internal ROM to the video RAM 43. In step F322, the fixed video data is pasted in the position ARx corresponding to the number of the disc currently being read in the video RAM 43.

  If it is CD-G, the process proceeds to step F321, and the image data decoded by the CD-G decoder 52 is fetched into the video RAM 43 and reduced to a position ARx corresponding to the number of the disc currently being read in the video RAM 43. Paste.

If no disc is loaded, the process proceeds to step F323. Here, the system controller 53 instructs the OSD processing unit 50 to display “NO DISC” at the display position ARx corresponding to the storage position (disc number) that is the current target on the all-disc digest display video. Let
If the disk is an invalid disk, the process proceeds to step F326, where the system controller 53 issues an instruction to the OSD processing unit 50, and corresponds to the storage position (disk number) that is the current target on the all disk digest display video. Display such as “DISC ERROR” is executed at the display position ARx. In the case of an invalid disk, the process may proceed to step F323 as in the case where the disk is not loaded.

When this process is completed for a certain disk, the next disk is chucked in step F325. That is, the disk tray 30 is rotated, and the disk for the next storage position 30 _{x + 1} is loaded. Then, the processing from step F310 is repeated.

When the processing from step F110 is completed (F324 → YES) for _five disks (storage positions 30 ₁ to 30 ₅ ) by such processing, the connected monitor device has, for example, as shown in FIG. The same all-disc digest video is output as in the operation example 1 described above.

However, in FIG. 3, the display position AR5 is displayed to indicate that “DISC 5” is an audio disc. In the case of the operation example of FIG. 8, if “DISC 5” is CD-G, A still image read from the CD-G is displayed.
In the case of this operation example, a menu video image is always displayed on the PBC disc, so that the display state as shown in FIG.

Also in this case, by executing the all disc digest display, the user can list and recognize each loaded disc.
In particular, CD-G can also be confirmed.

Although the all-disc digest operation of the embodiment has been described above, it goes without saying that various modifications can be considered as the all-disc digest operation in the present invention.
For example, the layout of the display positions AR1 to AR5 corresponding to each disk in the all disk digest display can of course be changed. Further, the changer playback apparatus may store four or fewer sheets or six or more sheets, but the all-disc digest display layout is naturally set according to the number of disks that can be stored.

Although the operation as an all-disc digest has been described, in the same manner, as shown in FIG. 5 (a), the first I picture of each track is extracted for one disc and a disc digest screen is displayed. As shown in FIG. 5B, it is also possible to take out some I pictures in a certain track and perform a digest display so that the track contents can be roughly understood.

[V. Fast-forward operation when displaying all disc digest]

1 First operation processing example

Next, the fast-forward operation when the all-disc digest display is executed as described above will be described.
The all-disc digest display allows the user to easily know what type of disc is installed in each of the storage positions 30 ₁ to 30 ₅ , but if he wants to know some details about the contents of each disc. There is.
Therefore, in this embodiment, when all-disc digest display is being performed, fast-forward playback is executed for each disc or specific disc, and the fast-forward video is displayed in the all-disc digest display.

A first operation example as a fast-forwarding operation at the time of displaying the all disc digest will be described with reference to FIGS.
Now, it is assumed that five video CDs are stored in the playback device 1, and that the display as shown in FIG. 10A is executed on the monitor device by the above-described all-disc digest operation. This state is shown as step F400 in FIG.

At this time, for example, when the user performs a fast-forward operation, the processing of the system controller 53 proceeds from step F400 to F402 via F401 in FIG.
In this case, as an operation key for the fast-forward operation, for example, the front cue key 11 may be used.
Even if the fast-forward operation is not performed, the all-disc digest display may be performed and the process may automatically proceed from step F402 when a predetermined time has elapsed.
In step F402, a variable x is first set to 1. Then, the disk loaded at the storage position 30 _x is loaded (F403). Thus initially the first disc mounted on the housing position 30 ₁ is loaded.

Here, it is determined whether or not a disk exists at the storage position 30 _x (F404). If a disk exists, that is, if loading is completed, the disk is activated (F405). The presence / absence of the disk is detected by the sensor means at the loading position, or the processing order is reversed in this flow, but the presence / absence of the disk may be determined based on whether or not the TOC can be read after starting. If there is no disk, the process proceeds to step F413 to proceed to processing for the next disk.

  In the start processing of the disk in step F405, the spindle motor 33 is started to rotate the disk, and laser irradiation is started from the optical head 34. Then, disc discrimination is performed based on the information read from the disc at this time (F405). Disc discrimination is performed by the processing shown in FIG.

If the disc is determined in the process of FIG. 7, the process proceeds to step F407, and if the disc is a video CD, the process proceeds to step F408 to read data from the disc. This data reading is a fast-forward playback process.
If it is not a video CD, the process proceeds to step F413, and the process for the next disk is started.

As fast-forward playback from step F408, the system controller 53 causes the optical head 34 to perform an operation schematically shown in FIG.
During fast-forward playback, I pictures are discretely extracted from the disc and displayed. Therefore, the normal reproduction operation is executed as shown in FIG. When an I picture is found, it is decoded by the MPEG video decoder 42, and the optical head 34 is caused to execute a track jump of several tracks. When the track jump is finished, the normal playback operation is executed again to search for an I picture. By repeating such an operation, fast-forward playback is executed.

The disk data reading operation in step F408 is an operation for searching for an I picture.
Since this reading is performed in the same manner as in normal reproduction, the audio sector A shown in FIG. 16 can also be read before the I picture is found. Therefore, the audio data read from the audio sector A is output from the MPEG audio decoder 40 via the switch unit 44 and the D / A converter 45. Thereby, although it is discrete at the time of fast-forwarding, the audio | voice output of normal speed is obtained.

If the I picture is found by the reading operation and can be decoded by the MPEG video decoder 42, the process proceeds from step F410 to F411. Then, the decoded I picture data is subjected to image reduction by predetermined pixel thinning or the like, and the video data is pasted at a position ARx corresponding to the number of the disk currently being read in the video RAM 43. Since the data in the video RAM 43 is output as it is, the reduced image appears at the display position ARx on the monitor device at the time of the paste processing.
Initially, because of the processing for the first disc, the reduced video data is pasted at the display position AR1, so that the all disc digest video in FIG. 10 (a) becomes as shown in FIG. 10 (b). Change.

Next, the system controller 53 causes the optical head 34 to execute a track jump of a predetermined number of tracks. When the track jump is completed, the system controller 53 returns to step F408 to again read the next I picture and execute the audio output.
If the I picture can be decoded, the process similarly proceeds to step F411, where the I picture data is reduced and pasted to the display position AR1. As a result, the all-disc digest video changes as shown in FIG.

Thereafter, the track jump and the reading operation are repeated in the same manner, and the process of reducing the read I picture data and pasting it to the display position AR1 is repeated (F408 to F412). With the above operation, the all-disc digest video changes in the order of FIG. 10 (a) → (b) → (c) →.
That is, only the display position AR1 corresponding to the first disk in the all-disc digest video is output as a fast-forward video from the first disk. Also, at this time, normal speed audio is also reproduced and output discretely. Thereby, the user can know the contents of the first disc in more detail in a short time. At this time, the image is not changed at the display positions AR2 to AR5 corresponding to the second to fifth disks.

In step F408 to F412, fast-forward playback is executed for the first disk, and the fast-forward video is displayed at the display position AR1. Immediately after the state shown in FIG. Reaches the lead-out, that is, fast-forward playback of the first disc is completed.
Then, the process proceeds from step F409 to F413, and the variable x is incremented.
If the variable x is not 6, the process returns to step F403. That is, when the fast-forward reproduction of the first disk is terminated, variable X = 2, and the second disk stored in the storage position 30 ₂ in step F403 will be loaded.

  Then, the same processing after step F404 is executed for the second disc, whereby the all disc digest video changes from the state of FIG. 10D to the state of FIG. 10E, and further, FIG. → ・ ・ ・ ・ → (g) will change. That is, the display position AR1 is fixed while the last I picture from the first disk is displayed, and the fast-forward video is displayed at the display position AR2 corresponding to the second disk.

Further, when the fast-forward playback of the second disk is completed in the state of FIG. 10G, the variable x is incremented in step F413, and the third disk stored in the storage position 30 ₃ is loaded in step F403. Similarly, fast forward playback is executed for the third disc in the processing from step F404 onward, and the fast forward video is displayed at the display position AR3 corresponding to the third disc as shown in FIG. 10 (g) → (h). It will be displayed. The display position AR2 is fixed at the last video from the second disk.
The above operation is sequentially executed for the fourth disc and the fifth disc, and each fast-forward video is displayed at the display positions AR4 and AR5.

  Thus, by performing fast-forward playback display for each disk within the all-disc digest display, the user can know the contents of each loaded disk in more detail in a short time. As a result, the operation of selecting a disc to be reproduced becomes easier.

  In the operation example of FIG. 9, fast-forward playback is executed only when the disc is a video CD, but fast-forward playback is also executed when the disc is a CD-G. Good. Further, even in the case of CD-DA with only audio data, the video may be fixed, for example, as shown in the display position AR5 in FIG. 3, and only the audio may be played back and output.

Further, although audio data that could be read from the disc during fast-forward playback of a video CD is output, audio data may not be output.
Further, fast-forward reproduction is executed for each disc until the lead-out is reached, but it is also possible to move to the next disc when fast-forward reproduction is performed to the middle of the disc.
Further, the fast-forward playback of the next disc may be started based on the user operation during the fast-forward playback. For example, if the user understands the contents of the disc by just looking at a certain fast-forward screen, it is possible to move to each disc more quickly by moving to the next disc fast-forward without performing fast-forward to the end by some operation. You can check the contents of.
Further, the fast-forward playback speed may be variably operated by the user.

2 Second operation processing example

Next, a second operation example will be described for the fast-forward operation during the all-disc digest display.
In the first operation example, all the stored disks are continuously fast-forwarded and reproduced. In this second operation example, a user who has viewed the all-disc digest video can select a specific disk from among them. And fast-forward video is output only for that disc. In other words, the user can select only the disk whose contents are to be confirmed in detail and play it back in the all-disc digest video.

FIG. 12 shows the processing of the system controller 53 for the fast-forward operation during the all-disc digest display in the second operation example.
At the time of executing the all-disc digest display (F500), the user can perform a fast-forward operation and can select a disc to be fast-forwarded. For example, after the front cue key 11 is pressed, the disc selection key 9 or the like is used for selection.

If the fast-forward operation is performed, the system controller 53 proceeds from step F501 to F502. If the disk is not selected, the system controller 53 proceeds to step F402 in FIG. That is, the process proceeds to the first operation example.
If a disk is selected, the process proceeds to step F503, and the selected number (disk number) is set in the variable x. For example, the description will be made assuming that the third disk is selected.

Next, the third disk stored in the storage position 30 _x , that is, the storage position 30 ₃ is loaded (F504).
Then, in the processing of steps F505 to F513, the same processing as the processing from steps F404 to F412 of FIG.
Since the processes in steps F505 to F513 are the same as those described with reference to FIG. 9, detailed description thereof is omitted. That is, in this case, the fast-forward playback is executed for the selected third disk, and the reading is sequentially performed. The I picture data is reduced and pasted to the display position AR3.

Therefore, in the all-disc digest video, only the display position AR3 is displayed as a fast-forward playback video from the third disc, and the display positions AR1, AR2, AR4, and AR5 remain fixed.
When the lead-out is reached for the disc (F510), the process is terminated.

  According to this operation example, the user can perform fast-forward playback within the all-disc digest video only for discs whose contents are to be checked in detail, and by not performing fast-forward playback for discs that do not need to be viewed, it can be performed in a shorter time. The advantage is that the contents of the desired disc can be confirmed.

In the operation example of FIG. 12, not only when the disc is a video CD, but also when the disc specified by the user is a CD-G or a CD-DA with only audio data, fast-forward playback of video or audio. May be performed.
Furthermore, instead of performing fast-forward playback until the lead-out is reached for the specified disc, it is automatically terminated when fast-forward playback is performed halfway through the disc, or fast-forward playback is terminated based on user operations. Also good.
Further, the fast-forward playback speed may be variably operated by the user.

It is explanatory drawing of the external appearance of the reproducing | regenerating apparatus of the Example of this invention. It is a block diagram of the reproducing | regenerating apparatus of an Example. It is explanatory drawing of the all disc digest display of an Example. It is explanatory drawing of the all disc digest display of an Example. It is explanatory drawing of the other digest display realizable in an Example. It is a flowchart of the 1st all disk digest display operation processing of an Example. It is a flowchart of the disk discrimination | determination process of an Example. It is a flowchart of the 2nd all disk digest display operation processing of an Example. It is a flowchart of the fast-forward operation | movement process at the time of the 1st all disk digest display of an Example. It is explanatory drawing of the fast-forward operation | movement at the time of the all disc digest display of an Example. It is explanatory drawing of the fast-forward reproduction | regeneration operation | movement of an Example. It is a flowchart of the fast-forward operation | movement process at the time of the 2nd all disk digest display of an Example. It is explanatory drawing of the format of the XA specification of CD-ROM. It is explanatory drawing of the video data of video CD. It is explanatory drawing of the image size of video CD. It is explanatory drawing of the track structure of video CD. It is explanatory drawing of the sector structure of video CD. It is explanatory drawing of the structure on the disc of video CD. It is explanatory drawing of the directory structure of video CD. It is explanatory drawing of the frame structure of a disc. It is explanatory drawing of a subcode data structure. It is explanatory drawing of sub Q data. It is explanatory drawing of TOC data. It is explanatory drawing of PVD of video CD. It is explanatory drawing of the video CD information area of video CD. It is explanatory drawing of the disc information of video CD. It is explanatory drawing of the segment play item content table in the disc information of video CD. It is explanatory drawing of the list ID offset table of video CD. It is explanatory drawing of the play list of video CD. It is explanatory drawing of the play item number of video CD. It is explanatory drawing of the selection list | wrist of video CD. It is explanatory drawing of the list structure of video CD. It is explanatory drawing of the playback control operation | movement by the list structure of video CD.

Explanation of symbols

1 playback device, 3 display section, 5 playback key (select key),
9 Disc selection key, 10 backward cue key (previa ski)
2 forward key (next key), 12 return key,
3 +/- selection key, 20 digest key,
21 digest mode key, 22 bookmark registration key,
23 Bookmark playback key, 24 Infrared receiver, 30 Disc tray,
30 ₁ to 30 ₅ storage position, 34 optical head, 36 RF amplifier,
37 servo circuit, 38 decoder section, 39 CD-ROM decoder,
40 MPEG audio decoder, 41 audio RAM,
4 MPEG video decoder, 43 video RAM,
44, 49 switch part, 45, 47 D / A converter,
46 audio output terminal, 48 RGB / NTSC encoder,
50 OSD processing unit, 51 video output terminal, 52 CD-G decoder,
53 System controller, 54 RAM, 55 Backup power supply,
56 operation unit, AR1 to AR5 display position, S1, S2 selection list,
P1-P5 playlist, PB1-PB10 playback output

Claims (1)

Storage means capable of storing a plurality of discs on which video or audio data is recorded;
Selection means for selecting a desired disk from a plurality of disks stored in the storage means;
Reproduction means for reading video data from each disk stored in the storage means;
Video output control means for controlling the video data of the respective discs stored in the storage means reproduced by the playback means to be displayed on the same screen;
First operating means for selecting video data corresponding to a predetermined disk from the video data of each disk on the same screen displayed by the video output control means;
Second operating means for instructing fast-forward playback of video data corresponding to the predetermined disc selected by the first operating means;
Control means for controlling the reproduction means so as to perform fast-forward reproduction of the video data of the predetermined disc selected by the first operation means in response to the fast-forward reproduction operation of the second operation means;
With
A reproducing apparatus for displaying video data fast-forwarded and reproduced by the reproducing means in a display area corresponding to a predetermined disc selected by the first operating means.

Images