JPH0887823A - Reproducer - Google Patents

Abstract

PURPOSE: To eliminate complicated operation which requires for a user to handle a power source of a monitor device according to a disc to be reproduced by transmitting a power source ON command or a power source OFF command to the monitor device according to the type of a recording medium to be reproduced. CONSTITUTION: When a disc to be reproduced is a video CD or CD-G, a monitor device 3 is needed. So, in this case, a power source ON command signal is transmitted to the monitor device 3 from an infrared rays transmitting section 2, when the monitor device 3 receives the command signal to turn ON a power source. Then, when an operation of reproducing the disc is started, a reproduction video is outputted from the device 3 and a voice signal from a speaker 4. On the other hand, when the disc is identified as CD-DA without video signal, the device 3 is not required and a system controller 53 sends a power source OFF command to the device 3 from the infrared rays transmitting section 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus compatible with a plurality of types of recording media, and more particularly to a reproducing apparatus capable of reproducing a CD-DA (Digital Audio Compact Disc) or a video CD.

[0002]

2. Description of the Related Art Various so-called ROM type disc media such as CD-DA and video CD have been widely used. CD-DA records digital audio data so that you can enjoy music with high sound quality.
A CD-G in which still image data is also recorded in subcode data is also known as a type of -DA. Further, as a kind of so-called CD-ROM, a video CD in which moving image data is recorded together with digital audio data has been developed.

As a reproducing device, a CD changer has been developed which can store not only one disc but also a plurality of discs and selectively reproduce it.
A type compatible with video CDs has also been developed for changers.

[0004]

By the way, in such a reproducing apparatus, a video CD, a normal CD-DA, and a CD are used.
-Some can be played back corresponding to each of CD-G, which is a type of DA. That is, it is possible to reproduce both a disc on which video data of a moving image or a still image is recorded and a disc on which video data is not recorded. Usually, a monitor is connected to such a reproducing apparatus so that video data is reproduced and output. However, during reproduction of a CD-DA in which only audio data is recorded, naturally a monitor is not necessary. is there.

However, for example, if the user switches the CD-DA playback mode after playing a video CD, turning off the power supply of the monitor device is troublesome for the user, and the monitor is powered on as it is. It is often said that. In particular, when a plurality of discs are continuously reproduced using a changer type reproducing device, it is quite troublesome to operate the power supply of the monitor device according to the discs to be reproduced. Therefore C
The monitor is often left on even during D-DA reproduction, which is not preferable from the viewpoint of energy saving. On the contrary, it is troublesome to turn on the power of the monitor device when switching to the reproduction of the video CD after reproducing the CD-DA.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to automatically operate the power source of a monitor device according to a disc to be reproduced in the reproducing device. To aim.

For this reason, in a reproducing apparatus capable of reproducing corresponding to a plurality of kinds of recording media including a recording medium on which video data is recorded and a recording medium on which video data is not recorded, the reproduction target And a command transmitting means capable of transmitting a power-on or power-off command signal to the video display device based on the recording medium type determination result by the determining means. .

[0008]

By sending a power-on / off command from the playback device to the video display device such as the monitor device by means of the command transmission means, for example, an infrared command signal, the playback device can be operated to power the monitor device. Therefore, if the reproducing device discriminates the type of the disc to be reproduced and the power source of the monitor device is operated according to the discrimination of whether or not the video data exists, the power source of the monitor device is automatically operated. .

[0009]

EXAMPLE A video CD and a C will be described below as examples of the present invention.
A reproducing apparatus capable of reproducing video / audio for D-DA (digital audio CD and CD-G) will be described. First, the data structure of the video CD will be described.

The video CD standard is an application of the MPEG system standardized as a high-efficiency coding technique to enable reproduction of a moving image and sound for 60 minutes or more from a CD-ROM disc. This makes it useful as household software for music, movies, karaoke, and the like, and can also be combined with still images to support educational software, electronic publishing software, game software, and the like. In this video CD, M for moving image data
In addition to data compression by the PEG method, this moving image data is multiplexed with compressed audio data and recorded. Further, management data necessary for reproduction is recorded in a predetermined area. FIG. 5 shows a data format of the video CD (XA specification).

As shown in FIG. 5, the video and audio recording formats are 1.152 Mbit /
64 Kbit / sec to 384 Kbit / sec are allocated to the second and audio data. The pixel size of video data (moving image) is
352 x 240 pixels for NTSC signal (29.97Hz) and film (23.976Hz), 35 for PAL signal (25Hz)
It becomes 2 × 288 pixels, that is, as shown in FIG. 7. Also,
As for the number of pixels of a still image, in the case of the NTSC system, the standard level is 352 × 240 pixels, and the high definition level is 704 × 4.
The number of pixels is 80. In the case of the PAL system, the standard level is 352 × 288 pixels and the high definition level is 704 × 576 pixels.

Video data (moving image) according to the MPEG system
The compression encoding of is performed as follows. If the video signal before compression is the NTSC system, the case of this NTSC system is 1
It is composed of video signals of 30 frames per second. MP
In the EG method, each video signal (1 frame) is divided into blocks in the plane direction (horizontal 22 block division, vertical 15 block division, 330 block), data of each block is DCT converted, and the number of bits is further increased. Requantization is performed to reduce the number (high frequency components are set to 0). Then, the blocks are rearranged in a zigzag manner from the block at 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 thus compressed is very similar to the video information in the frames preceding and succeeding in time, and this information is used to further compress the information. , Three types of video data with different compression levels (one frame of video data) are provided. These are I picture (Intra Picture), P picture (Predicated Picture), and B picture (Bidirecti).
onari Picture).

Then, for each of the 30 frames per second, generally, I picture, P picture and B picture are arranged as shown in FIG. 6 (a). For example, in this case, frames at 15-frame intervals are I pictures I ₁ and I _2, and eight P pictures P ₁
˜P ₈ and 20 B pictures B _{1 to} B ₂₀ are arranged as shown. The section from a certain I-picture to the frame before the next I-picture is GOP (Grou
p of Picture).

The I picture is the normal image data encoded by the DCT conversion as described above. As shown in FIG. 6B, the P picture is coded from the closest I picture or P picture using motion compensation and is generated. 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. Since the I-picture and the P-picture are sequentially generated, if an error occurs, the error propagates.

The B picture is generated by using both past and future I pictures or P pictures as shown in FIG. 6 (c). 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. Further, since it does not serve as 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 by the random access degree and scene cut. For example, if importance is attached to random access, FIG.
As shown in (a), at least two I-pictures are required for one second. Furthermore, the frequency of P pictures and B pictures can also 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 that the efficiency of the decoder is improved.
For example, in the case of FIG. 6A, the frame order to be displayed (decoder output order) is the same as the frame number shown in the lower part of FIG. 6A, but the B picture is recombined by the decoder. A P picture that becomes a reference earlier is needed. For this reason, on the encoder side, the frame order of FIG. 6D is rearranged as shown in FIG. 6E, and this is transmitted as a video data stream.

Next, the MPEG audio data format is compatible with a wide range of coding speeds from 32 kbit / sec to 448 Kbit / sec. However, in consideration of the simplified software production and high sound quality, the video track after track 2 is 22
It is set to 4 Kbit / sec. The sampling frequency is 44.1 KHz like CD-DA.

In addition to video data and audio data, management data for controlling various reproduction operations of these are recorded on the video CD. That is, CD-DA
Similarly, the TOC and the sub-code are recorded to indicate the number of tracks, the start position (absolute time) of each track, and the like. Further, the track 1 is used as a video CD data track on the video CD, and various management information is recorded therein.

Next, in the video CD, for example, the data structure of a track on which video and audio data, which is unit data of one piece of music, is recorded is shown in FIG.
It becomes like (a). Assuming to search by track number such as CD-DA, 15 is added at the beginning of one track.
A pause margin of 0 sector is set. Further, 15 sectors following the pause margin are used as a front margin, and the last 15 sectors of the track are used as a rear margin, which are empty data areas.

M between the front margin and the rear margin
It is a PEG data area. In the MPEG data area,
As shown in FIG. 8B, the sectors V, which are the video data, and the sectors A, which are the audio data, are time-division multiplexed and recorded by interleaving so that they are arranged at an average ratio of 6: 1. It will be.

Here, the structures of the CD-DA and the video CD on the disc are shown in FIG. Figure 9 (a) for CD-DA
As described above, the lead-in area is provided on the innermost side of the disc, and the TOC data is recorded therein. As the TOC data, the start position of each track, the number of tracks, the playing time, etc. 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. On each track, 16-bit quantized digital audio data is recorded together with subcode data at 44.1 KHz sampling.

On the other hand, the structure of the video CD on the disc is shown in FIG. 9B. CD-DA for video CDs
Similar to the above, a lead-in area is provided on the innermost circumference side of the disc and TOC data is recorded. Then, 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. And track # 2 to track #
Actual video / audio data is recorded in n. That is, the tracks # 2 to #n are configured by the video sector V and the audio sector A as shown in FIG. In the case of a video CD, it is possible to provide a track on which only audio data is recorded. In that case, a CD-D
16 bit quantized digital audio data is recorded at 44.1 KHz sampling similar to A.

The number of tracks can be up to 99 in both CD-DA and video CD. Therefore CD
-Up to 99 songs for DA, up to 98 for video CD
Sequence can be recorded. A sequence is one continuous segment of a moving image. For example, when an image such as karaoke is recorded, one song (one track) is one sequence, and in the case of a movie, one disc is usually one sequence. Becomes

In the video CD data track using the track # 1, PVD (basic volume descriptor), karaoke basic information area, video CD information area,
A segment play item area and other files (such as a CD-I application program) are prepared.

The PVD (Primary Volume Descriptor) is arranged on the disk at a position from the absolute time address 00:02:16 (minute / second / frame). The karaoke basic information area has an absolute time address of 0.
It is located at the position from 0:02:16. Video CD information area is absolute time address 00:00
It is placed at the position from 4:00. 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 PVD.

Next, the TOC and subcode recorded in the lead-in area of the video CD and CD-DA will be described. The minimum unit of data recorded on the video CD and the 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, and the first 24 bits are the synchronization data and the subsequent 14 bits are the subcode data area. Then, after that, data and parity are arranged.

One frame is composed of 98 frames in this structure, and sub-code data extracted from 98 frames is collected to form one block as shown in FIG.
Subcode data for the block is formed. First and second frames of the 98th frame (frame 98n +
The subcode data from the first frame 98n + 2) is a synchronization pattern. Then, from the third frame to the 98th frame (frame 98n + 3 to frame 98n +
Up to 98), each 96-bit channel data, that is, P, Q, R, S, T, U, V, W subcode data is formed.

Of these, P is used for management of access, etc.
Channels and Q channels are used. However, the P channel only shows the pause portion between the tracks, and for more detailed control, the Q channel (Q ₁ ~
Q ₉₆ ). 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 are used for identifying the number of audio channels, emphasis, and CD-ROM. 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 possible "** 0" ... No pre-emphasis "*** 1" ...・ With pre-emphasis

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

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

First, the track number is recorded. The track number is fixed to "00" in the lead-in area. Next, POINT (point) is written, and MIN (minute) and SEC are shown as elapsed time in the track.
(Second) and FRAME (frame number) are shown. Furthermore, PMIN, PSEC, and PFRAME are recorded, and these PMIN, PSEC, and PFRAME are POI.
The value of NT determines the meaning.

When the value of POINT is "01" to "99", that value means the track number, and in this case PM
In IN, PSEC, and PFRAME, the start point (absolute time address) of the track of that track number is recorded as minutes (PMIN), seconds (PSEC), and frame number (PFRAME).

When the value of POINT is "A0", PM
The track number of the first track is recorded in IN.
Also, depending on the value of PSEC, CD-DA, CD-I, C
The D-ROM (XA specification) is distinguished. POINT
When the value of is "A1", the track number of the last track is recorded in PMIN. The value of POINT is "A
2 ”, the start point of the lead-out area is indicated in PMIN, PSEC, and PFRAME as an absolute time address.

For example, in the case of a disc in which 6 tracks are recorded, the TOC based on such sub-Q data has data recorded as shown in FIG.

As shown in FIG. 13, all track numbers TNO are "00". Block No. Is 9 as above
1 read as block data of 8 frames
The sub Q data number of the unit is shown. Each TOC data has the same contents written in three blocks. As shown, POINT is from "01" to "0".
6 ”, the start points of tracks # 1 to # 6 are shown as PMIN, PSEC, and PFRAME.

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

Then, the track number of the last track is recorded in PMIN at the position of POINT value "A1", and PMIN, P is recorded at the position of POINT value "A2".
The start point of the lead-out area is shown in SEC and PFRAME. 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 of FIG. 12 (b). First, the track number is recorded. That is, in each of tracks # 1 to #n, "01" to "9"
9 ”. In the lead-out area, the track number is "AA". Then, information that can further subdivide each track is recorded as an index.

Then, as the elapsed time in the track, MI
N (minutes), SEC (seconds), FRAME (frame number)
Is shown. Furthermore, AMIN, ASEC, AFRAM
As E, absolute time address is minute (AMIN), second (A
SEC) and frame number (AFRAME).

Next, the above video CD and CD
-A reproducing apparatus which is an embodiment of the present invention and which can reproduce DA will be described. The reproducing apparatus of the embodiment accommodates five video CDs and CD-DAs and can selectively reproduce, and is a so-called changer video CD player.

FIG. 1 shows an example of system configuration when the reproducing apparatus 1 of the embodiment is used. As shown, the video output from the playback device 1 is connected to the monitor device 3 by a video line 5. The audio output from the reproducing apparatus 1 is connected to the speakers 4 and 4 by the audio line 6. Reference numeral 2 denotes an infrared transmitter of the reproducing apparatus 1, and the reproducing apparatus 1 is configured so that the infrared transmitter 2 can transmit a required command signal to the monitor device 3.

FIG. 2 shows the internal structure of the reproducing apparatus 1. In FIG. 2, reference numeral 30 is a disc tray. The disc tray 30 is provided with storage positions 30 ₁ to 30 ₅ so that _five discs can be loaded. The disk tray 30 is configured to be rotated by a motor 31, and this rotation operation causes a certain storage position 3
_0x is sent to the position of the optical head 34. That is, the disk loaded in the storage position 30 _x is loaded in 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 know 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 rotationally driven by the spindle motor 33. And the disk is the spindle motor 33
The laser light is emitted from the optical head 34 without being rotated by, and the information is read by the reflected light.

The optical head 34 is equipped with a laser diode as a laser output means, an optical system including a deflecting beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens 34a is a two-axis mechanism 3
It is held by 4b so as to be displaceable in the radial direction of the disc and in the direction in which it comes in and out of contact with the disc. Reference numeral 35 denotes a sled mechanism that drives the optical head 34 in the disk radial direction.

The information detected from the disc 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, etc., by processing the supplied information. And the extracted reproduction R
The F signal is supplied to the decoder unit 38, where EFM demodulation and error correction are performed. In addition, P and Q channel subcode data are extracted and supplied to the system controller 53.

Further, the tracking error signal and the focus error signal are supplied to the servo circuit 37. The servo circuit 37 supplies the supplied tracking error signal and focus error signal, the track jump command, the seek command from the system controller 53, and the spindle motor 33.
Various servo drive signals are generated based on the rotational speed detection information of the above, and the biaxial mechanism 34b and the sled mechanism 35 are controlled to perform focus and tracking control, and the spindle motor 33 is controlled to a constant linear velocity (CLV).

Reference numeral 39 is a CD-ROM decoder. The disc being played is 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. Then, among the signals decoded by the CD-ROM decoder 39, various kinds of disc information such as the above-mentioned information for playback control 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 performs decoding and outputs a decoded audio signal at a predetermined timing while using the audio RAM 41. Further, the video data decoded by the CD-ROM decoder 39 is the MPEG video decoder 4
2 is supplied. The MPEG video decoder 42 uses the video RAM 41 to perform decoding and decode video signal output (RGB output) at a predetermined timing.

Reference numeral 44 is a switch section which can be switched according to the type of the disc to be reproduced. When the disc being played back is a CD-DA, a digital audio signal is obtained by the decoder unit 38 performing a decoding process such as EFM demodulation and CIRC as the playback signal.
During CD-DA reproduction, the system controller 53 connects the switch unit 44 to t ₁ terminal. Therefore, the digital audio signal from the decoder unit 38 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 in the subsequent stage.

If the disc being reproduced is a video CD, the audio data is obtained from the MPEG audio decoder 40. During reproduction of the video CD, the system controller 53 connects the switch section 44 to the t ₂ terminal. Therefore, the digital audio signal from the MPEG audio decoder 40 is converted into an analog audio signal by the D / A converter 45, and the audio output terminal 4
6 is output to an external device such as an amplifier circuit or an amplifier in the subsequent stage.

When reproducing the video CD, RGB video data is obtained as an output of the MPEG video decoder 42. This RGB image data is converted into RGB by the D / A converter 47.
It is an analog signal. Then, the RGB signals are supplied to the RGB / NTSC encoder 48, and the RGB signals are converted into NTSC composite video signals. And the switch section 49
Is supplied to the t ₂ terminal of the.

During playback of the video CD, the system controller 53 connects the switch section 49 to the t ₂ terminal, so that the composite video signal of the NTSC system is the OS.
The video signal is supplied from the video output terminal 51 to the monitor device or the like via the D processing unit 50, and the video output is executed. By the operation of the OSD processing unit 50 based on the instruction from the system controller 53, it is possible to perform a predetermined superimposed display on the output video.

By the way, the disc to be reproduced is a CD-D.
If it is A and is CD-G, still image data is read from the R to W channels of the subcode. This still image data is stored in the CD-G decoder 52.
To be decoded and output as an NTSC composite video signal (still image). CD-DA during reproduction, the switch section 49 is connected to t ₁ terminal, thus the video signal reproduced from the CD-G is the OSD processing unit 50
Is supplied to the monitor device or the like from the video output terminal 51 via the, and video output is executed. Also in this case, the OSD processing unit 5
With 0, a predetermined superimposed display can be performed on the output video.

Reference numeral 55 is a display section provided on the front panel of the reproducing apparatus 1 and made of liquid crystal or the like. When performing a reproducing operation from the disc, the management information recorded on the disc, that is, the TOC and the subcode data, is read out and supplied to the system controller 53. The system controller 53 responds to these management information. A track number, a reproduction time display, etc. are displayed on the display unit 55. An operation input unit 56 is provided for user operation, and is provided with operation keys such as a disc selection key, a play key, a stop key, an FF / REW key, and various mode setting keys.

Further, the system controller is an internal ROM
A command code for powering on, powering off, etc. for the monitor device 3 is stored in the RAM 53b or the RAM 53a, and the command code can be infrared-luminance modulated in the infrared transmitter 2 and transmitted and output.

As described above, the video CD and the CD-DA,
The processing of the system controller 53 at the time of reproduction in the reproducing apparatus 1 of the present invention capable of reproducing a CD-G will be described with reference to FIG. When the reproduction operation is performed and the reproduction is started, the process proceeds from step F101 to F102, and the disc tray 30
Disks D mounted in storage positions 30 ₁ to 30 ₅ of
One of the disks 1 to D5 is loaded. Which disc is to be ordered is decided according to the user's designation and the reproduction operation mode such as continuous reproduction, shuffle reproduction, and program reproduction.

A certain disk is selected and the optical head 34 is selected.
When it is sent to the position of and is chucked, the disc reproducing operation is started. That is, the spindle motor 33
Is started to rotate the disk, and laser irradiation is started from the optical head 34. Then, the disc is first discriminated based on the information read from the disc at this time (F103).

Disc identification is performed by the process shown in 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. 13, PS is set in the block whose POINT is “A0”.
If EC = “20”, the disc is a CD-ROM of the XA specification. On the other hand, if PSEC = "00", it is CD-DA, and if PSEC = "10", it is CD-DA.
I.

Therefore, the PSEC of the block of the POINT "A0" is confirmed (F203), and the CD-of the XA specification is read by "20".
If it is determined to be ROM, the process proceeds to step F204. Then, the disc information data from the absolute time address 00:04:00 is read. The video CD information area shown in FIG. 9 (b) includes a data area for disc information. In this disc information, if "VIDEO CD" is recorded in the first system identifier,
The disc is identified as a video CD. In this case, the process proceeds from step F205 to F206. Then, the version number recorded after the system identifier is confirmed.

If the version number is "$ 0200", the disc is a version 2.00, and in this case, a playback control function may be added.
Playback control is a playback processing method that allows interactive playback progress using a menu screen. In order to support this playback control function, the size of the PSD area is shown in the disc information of the version 2.00 video CD. Therefore, in step F207, the PSD size data of the disc information is confirmed. When the playback control function is added, the size of the PSD area is shown, and when the playback control function is not added, the PSD size is "0".
Therefore, if the PSD size is not "0", the disc is discriminated as a video CD with a menu to which a playback control function is added (F208).

On the other hand, if the PSD size is "0", it is determined that the playback control function is not added, that is, the video CD has no menu (F210). If the version number is "$ 0101" in step F206, it means that the disc is version 1.01 and the playback control function is not added in this case, so it is determined as a video CD without a menu (F410). .

If PSEC is not "20" in step F203, it is confirmed in step F211 whether PSEC is "00", and in step F212, the control data (Q ₁ ... Q ₄ ) is “x0x
x ”. This step F211 and F2
If the result is 12, the disc is a CD-DA.
(F213). In other words, it is a CD-DA containing only audio data, or subcodes R to W
CD-G with still image data recorded using channels
Is.

If a negative result is obtained in any of steps F211, F212, F205, and F209, the disc is judged to be invalid because it is another type of disc not applicable to the reproducing apparatus of this embodiment (F414). ).

When the disc is discriminated by the process of FIG. 4, the reproducing process proceeds to step F104 of FIG. 3, and first, it is confirmed whether or not the currently loaded disc is a video CD. Also, not a video CD, but a CD-D
If it is A, the process proceeds from step F105 to F106 to check the subcode data. That is, it is determined whether or not the disc is a CD-G by checking the subcode R to W channels by taking in the reproduced data from the disc to some extent and checking whether or not the still image data is recorded there. To do.

The disc to be played is a video CD or a CD
If the value is -G, the monitor device 3 is required. Therefore, in these cases, the process proceeds to step F107, and the infrared transmitter 2 transmits a power-on command signal to the monitor device 3. At this time, the monitor device 3 receives this command signal and turns on the power supply. And step
In F109, the reproducing operation of the disc is started, the reproduced video is output from the monitor device 3, and the reproduced sound is output from the speaker 4.

On the other hand, if the disc is a CD without video data,
If it is determined to be DA, the monitor device 3 becomes unnecessary. Therefore, in this case, the process proceeds to step F108, and the system controller 53 transmits a power-off command signal from the infrared transmitter 2 to the monitor device 3. At this time, the monitor device 3 receives the command signal and turns off the power. Then proceed to step F109,
The reproduction operation of the disc is started, and reproduction sound is output from the speaker 4.

When the disc to be reproduced is exchanged by the user's operation or the control in the continuous reproduction mode, the shuffle reproduction mode, the program reproduction mode, etc., the process returns from step F110 to F102 to load the next disc. Then, disc discrimination is performed similarly (F10
3), a video CD or a CD in the processing of steps F104 to F109
-G, a power-on command is sent to the monitor device 3, while the disc is a CD-DA without video data.
If so, a power-off command is sent to the monitor device 3. Then, the reproducing operation is executed.

If the reproducing operation is stopped by the user's operation or the control in the continuous reproducing mode, the shuffle reproducing mode, the program reproducing mode, etc., the process proceeds from step F111 to F112 to the monitor device 3. The power-off command is transmitted, and the operation ends.

As described above, by transmitting the power-on command or the power-off command from the infrared transmitter 2 according to the type of the disk, the monitor device 3 is automatically powered on only when it is needed and is not needed. At that time, the power is turned off. Therefore, the user does not need to perform the complicated operation of operating the power supply of the monitor device 3 according to the disc to be reproduced, and it is also preferable from the viewpoint of energy saving.

Although the embodiments have been described above, various modifications can be considered as the present invention. In the video CD, as described above, it is possible to provide an audio track of only audio data of the same format as the CD-DA. Therefore, even when the video CD is being played back, the monitor device 3 is present at the time when the audio track is being played back.
Becomes unnecessary. Therefore, when the track being reproduced becomes an audio track, a power off command may be transmitted. Of course, in this case, when the reproduction operation is changed from the audio track to the video track, the power-on command is transmitted.

In the embodiment, the command signal is transmitted by infrared rays. However, the command signal may be transmitted by radio waves, or the control signal line may be connected to the monitor device 3 to transmit the command signal by wire. You may Further, the command signal to be transmitted is not limited to power on / off, and other commands may be set according to the system. For example, when the monitor device 3 has a plurality of video input terminals, the playback device 1 is followed by the power-on command.
It is also conceivable to transmit an input switching command signal for selecting the input terminal to which is connected.

The present invention can also be applied to a reproducing apparatus capable of loading only one disc, instead of the changer type reproducing apparatus as in the embodiment. That is, when the disc is loaded and played back, the disc type may be discriminated and the power-on or power-off command signal may be transmitted accordingly.

Further, the embodiment is a video CD, CD-D.
Although a reproducing apparatus compatible with A and CD-G has been described, the reproducing apparatus compatible with other recording media may be used as the present invention. For example, the present invention can be similarly applied to a reproducing device compatible with a laser disc, a CD-V, and a CD-DA, as known as a multi-disc player.

[0079]

As described above, the reproducing apparatus of the present invention is configured to send the power-on command or the power-off command to the monitor apparatus according to the type of the recording medium to be reproduced. The power is automatically turned on only when necessary, and turned off when not needed. Therefore, there is an effect that the user does not have to perform a complicated operation of operating the power supply of the monitor device according to the disc to be reproduced, and the operability is significantly improved. In addition, it is solved that the monitor device is left on when it is not needed,
It is also useful from the viewpoint of energy saving.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a system configuration example of a reproducing device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a reproducing apparatus according to an embodiment.

FIG. 3 is a flowchart of processing during a reproducing operation according to the embodiment.

FIG. 4 is a flowchart of a disc discrimination process according to the embodiment.

FIG. 5 is an explanatory diagram of a XA specification format of a CD-ROM.

FIG. 6 is an explanatory diagram of video data of a video CD.

FIG. 7 is an explanatory diagram of an image size of a video CD.

FIG. 8 is an explanatory diagram of a track structure of a video CD.

FIG. 9 is an explanatory diagram of a structure of a video CD on a disc.

FIG. 10 is an explanatory diagram of a frame structure of a disc.

FIG. 11 is an explanatory diagram of a subcode data structure.

FIG. 12 is an explanatory diagram of sub Q data.

FIG. 13 is an explanatory diagram of TOC data.

[Explanation of symbols]

1 Playback Device 2 Infrared Transmitter 3 Monitor Device 4 Speaker 5 Video Line 6 Audio Line 30 Disc Tray 30 ₁ to 30 ₅ Storage Position 34 Optical Head 36 RF Amplifier 37 Servo Circuit 38 Decoder 39 CD-ROM Decoder 40 MPEG Audio Decoder 41 Audio RAM 42 MPEG video decoder 43 Video RAM 44,49 Switch section 45,47 D / A converter 46 Audio output terminal 48 RGB / NTSC encoder 50 OSD processing section 51 Video output terminal 52 CD-G decoder 53 System controller 53a RAM 53b ROM 56 Operation unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H04N 5/91 H04Q 9/00 301 EA

Claims (1)

[Claims] 1. A playback device capable of performing playback corresponding to a plurality of types of recording media including a recording medium on which video data is recorded and a recording medium on which video data is not recorded. Discriminating means for discriminating the type of the recording medium, and command transmitting means capable of transmitting a power-on or power-off command signal to the video display device based on the discrimination result of the recording medium type by the discriminating means. A reproducing device characterized by being provided.