JP2002185926A - Recording and reproducing device and method, recording and reproducing controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording and reproducing device that can record/ reproduce a digital signal of a digital broadcast program or the like by taking a form of a multiplex stream into account, to provide a recording and reproducing device that can record signals continuously received on a recording medium or continuously reproduce signals recorded on the recording medium and to provide a recording and reproducing device that takes the operation convenience and copy protect into account. SOLUTION: The recording and reproducing device is configured such that the recording and reproducing device records a signal or reproduces a signal to or from a removable medium such as an optical disk through a non- removable HDD.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus capable of recording / reproducing a digital signal, and particularly to a recording / reproducing control for controlling recording / reproducing of a digital signal using a non-removable recording medium capable of high-speed writing and reading. The present invention relates to an apparatus and a recording / reproducing apparatus using the same.

[0002]

2. Description of the Related Art Recently, CPUs (Central Process
ing Unit) has become faster and more sophisticated, and the capacity of memory and hard disks (hereinafter abbreviated as HDDs) has been increased, making it possible to purchase high-performance personal computers (hereinafter abbreviated as PCs) at low cost. Was. For home AV equipment, recordable optical disks have been developed, and optical disk recording / reproducing devices have been commercialized. Further, optical disks capable of recording on both sides have been developed for long-time recording. A device that records and reproduces video and audio on such a removable recording medium using a non-removable recording medium such as an HDD has also been commercialized as an AV device. Further, AV devices (optical disk devices and video tape recorders) with built-in HDDs have also been commercialized.

[0003] JP-A-11-39850 discloses a TV set.
(Television) Tuner, MPEG (Moving Picture
(Experts Group) Equipped with an encoder board, realizes recording and playback of broadcast signals and editing from video cameras, etc.Especially, while recording using HDD, it is possible to reproduce recorded video and audio at any scene Features have been proposed.

Also, CS digital broadcasting has already started,
Digital VTRs capable of stream recording digital broadcasts have also been introduced to the market. B since the end of 2000
S digital broadcasting is scheduled, and new high-definition video will be distributed. In general, there are bit multiplexing and packet multiplexing as methods for multiplexing a plurality of digital contents such as video and audio into one bit stream. In the MPEG system, the latter packet multiplexing is adopted. There are two types of packet multiplexing, a transport stream (TS) and a program stream (PS). The MPEG system has two types of stream structures, TS and PS. The digital tuner adopts a TS-type stream structure in order for the receiver to receive the service and the transmitted program without any problem. On the other hand, in an optical disk reproducing apparatus, data is defined by a stream structure of PS format.

[0005] JP-A-10-154373 discloses that T
By converting a signal from a PS to a TS when transmitting a signal to a device that handles S, a reproduction signal of the optical disk reproduction device is output to a device having a different stream format (for example, a television receiver),
It has been proposed that optical disc reproduction be possible.

[0006]

However, the above publication does not describe how to record a multiplexed stream in the TS format handled by the digital tuner in the HDD. Further, there is no description of means for realizing the transfer of a multiplex stream between respective devices when an optical disk recording / reproducing device is combined with a recording / reproducing device using an HDD. Further, in an optical disk recording / reproducing apparatus or the like incorporating a non-removable recording medium such as an HDD, there is no description about means for realizing the transfer of a multiplex stream between the optical disk and the HDD.

In particular, a recording method for recording a TS format multiplex stream from a digital tuner on an optical disc employing a PS format multiplex stream,
It does not describe the role of the HDD in the recording process or the role of the HDD in returning a signal to the digital tuner during reproduction.

Further, when recording a real-time broadcast signal from a digital tuner, a discontinuous period occurs when switching between the front and back surfaces of a double-sided recordable optical disk or when exchanging optical disks when recording on a plurality of optical disks. However, there is a problem that recording of the continuous signal is hindered. Similarly, when reproducing a signal from an optical disk, there is a problem that the signal cannot be continuously reproduced when the disk is replaced. However, the above publication does not mention these points.

Further, the above-mentioned publication does not mention copyright protection for a device having two recording media, such as an optical disk device with a built-in HDD, and search means.

It is an object of the present invention to provide a recording / reproducing apparatus having a non-removable recording medium and a removable recording medium, taking into account the format of a multiplex stream. It is another object of the present invention to provide a recording / reproducing apparatus capable of continuously recording signals transmitted continuously on a recording medium or continuously reproducing signals recorded on the recording medium. An object of the present invention is to provide a recording / reproducing apparatus in consideration of usability and copy protection.

[0011]

In order to achieve the above object, a recording / reproducing apparatus according to an embodiment of the present invention records an input digital signal on a non-removable recording medium and reads the digital signal from the recording medium. The digital signal is converted and recorded on a removable recording medium. In addition, the digital signal recorded on the removable recording medium is reproduced via the non-removable recording medium.

[0012]

Embodiments of the present invention will be described below. FIG. 1 is a block diagram of a recording and reproducing apparatus according to an embodiment of the present invention. The recording / reproducing apparatus has an HDD and a disk drive (hereinafter, referred to as a disk drive) for driving a removable medium such as an optical disk. Here, 1 is a recording / reproducing device, 2 is a digital interface, 3 is an HDD interface, 4 is an HDD, 5 is a disk drive, 6 is a disk drive interface, 7 is a TS / PS conversion circuit,
8 is an interface block, 9 is a memory, 10 is a microcomputer (hereinafter abbreviated as a microcomputer), 11 is a data bus, 16 is a microcomputer, 17 is a digital signal input / output terminal, and 22 is a digital BS tuner.

First, the digital tuner 22 sends an HDD
Will be described. The MPEG stream from the digital tuner 22 is a multiplex stream in the TS format. The signal input from the terminal 17 is sent to the HDD interface 3 via the digital interface 2. Then, the output is H through the data bus 11.
It is sent to DD4 and recorded. At this time, recording on the HDD is controlled by the microcomputer 10. As described above, B
The TS from the S digital tuner is once recorded on the HDD 4 in the same format. Since the HDD has a large capacity and a high transfer rate, all information included in the TS can be recorded at high speed for a long time.

The reproduction from the HDD 4 will be described. TS read from HDD 4 via data bus 11
Is sent to the digital interface 2 via the HDD interface 3. Then, the TS output from the terminal 17 is transmitted to the digital tuner 22 side in a TS format MP.
The EG signal is decoded, converted into a video signal, and output to a television or the like. By being recorded in TS,
All information such as data broadcasting can be reproduced, and it is possible to easily realize a time-shifted reproduction of a broadcast which is no different from the current broadcast.

Next, the dubbing recording from the HDD 4 to the optical disk will be described. The TS read from the HDD 4 via the data bus 11 and the disk drive interface 6 is converted to a PS by the TS / PS conversion circuit 7. Thereafter, the data is again sent to the disk drive via the disk drive interface 6 and the data bus 11, and is written on the optical disk. The memory 9 is used for temporarily storing data at the time of TS / PS conversion. By doing so, dubbing and recording can be performed on the optical disc without depending on the recording speed on the optical disc, the TS / PS conversion time, and the like, and necessary information can be stored. Also,
When 100% information cannot be held during TS / PS conversion due to a problem of processing speed on the optical disk side or a decrease in performance when cost reduction is considered (for example,
In data broadcasting, etc.), 100% information is temporarily recorded in the HDD, so that image quality and function equivalent to broadcasting can be maintained within a certain time range when the capacity of the HDD is full.

In the case of MPEG, the higher the image quality mode, the lower the compression ratio and the higher the transfer rate. For this reason, there is a problem that it takes time to write data on the optical disk or the like, and it becomes impossible to record the distributed signal. As in the present embodiment, by passing once through the HDD, it is possible to record a signal that is continuously transmitted in real time, such as a broadcast, without loss.

The reproduction from the optical disk will be described.
Here, a mode in which the signal read from the optical disk is directly output and a mode in which the signal is output once via the HDD are considered. In the former case, the PS reproduced from the disk drive 5 is converted into a TS by the TS / PS conversion circuit 7 after passing through the data bus 11 and the disk drive interface 6. Then, the HDD is again connected via the disk drive interface 6 and the data bus 11.
The data is sent to the digital interface 2 via the interface 3. In the latter case, the data is converted into a TS stream by the TS / PS conversion circuit 7, and then recorded again in the TS state by the HDD 4 via the disk drive interface 6 and the data bus 11. Then, reading from the HDD 4 is performed at the same time. The read TS is sent to the digital interface 2 via the data bus 11 and the HDD interface 3, and its output is sent to the digital BS tuner 22 via the terminal 17.
And the TS is decoded. As in the case of recording, when the transfer rate increases, such as in the high-quality mode, it takes time to read data from the optical disk, etc., and reading may not be possible instantaneously. Can be played.

Next, TS / PS conversion will be briefly described with reference to FIG. The TS 30 shown in FIG. 3A is composed of several TS packets. As shown in FIG.
The S packet 31 includes a TS header 32 and a TS payload 34
It is composed of The stream 35 formed by connecting only the TS payloads shown in (c) is a PES (Packe
A PES header is included at the head of the stream. The stream 38 shown in (d) is called a pack, and is composed of several PESs 35, and a pack header 39 is connected to the head thereof.
A continuous stream 41 of such packs shown in (e)
Is PS. The TS / PS conversion can be realized by switching the streams as described above.

Next, with reference to FIG. 3, an embodiment will be described in which a function of recording and reproducing a digital signal obtained by MPEG-encoding an external video input signal is added to the recording and reproducing apparatus shown in FIG. Here, the description will be focused on the differences from the embodiment of FIG. 1, and the description of the same portions will be omitted.

First, recording of an external input signal will be described. The video and audio signals input from the external input terminal 18 are converted into digital signals by the AD / DA conversion circuit 15,
The video is decoded by the video encoder / decoder block 14. Thereafter, the data is compressed (encoded) by the MPEG codec 13 and input to the interface block 8 via the data bus 11. Here, an MPEG-encoded signal is generally output as a multiplexed stream in the PS format. Therefore, the signal input to this interface block is a signal in the PS stream format, and the following two modes are conceivable for recording on the optical disc. The first mode uses the HDD as a buffer. That is, this mode is a mode in which a program that is temporarily recorded on the HDD, a program that is not worth saving is reproduced from the HDD and then deleted, and a program that the user wants to save is dubbed and recorded on an optical disk or the like. The second mode is a mode for recording directly on the optical disc.

In the first mode, the TS / PS conversion circuit 7 converts the PS stream input from the data bus 11 into a TS stream.
Convert to Then, the data is sent to the HDD 4 via the disk drive interface 6 and the data bus 11 and recorded. The signal temporarily recorded in the HDD 4 is read out, and is again converted to PS by the TS / PS conversion circuit 7 via the data bus 11 and the disk drive interface 6. Thereafter, the data is sent to the disk drive 5 via the disk drive interface 6 and the data bus 11,
Recorded on an optical disc. In this way, only the programs that one wants to save can be recorded on the optical disc. In addition, when a high-quality mode with a low compression ratio, that is, a high-rate recording of an external input signal is desired, and when recording directly on an optical disk or the like is not sufficient in terms of speed, an HD capable of high-speed recording is used.
The problem can be solved by temporarily recording in D. In the present embodiment, the PS stream input from the data bus 11 is converted into a TS and recorded on the HDD 4 after the conversion. However, in the case of a set that supports analog signal input / output and has no interface with a digital tuner, the PS The format may be recorded on the HDD. According to this method, no conversion is required when recording the signal recorded on the HDD 4 on the optical disc, and the recording time can be shortened.

In the second mode, the PS input from the data bus 11 is sent directly to the disk drive interface 6 without conversion, and is directly recorded on the optical disk via the data bus 11. This is 10
This is a mode in which a program desired to be stored at 0% is directly recorded, and there is an advantage that dubbing operation can be avoided and recording can be easily performed.

FIG. 4 is a detailed block diagram of the TS / PS conversion circuit. First, the path indicated by the dotted line 58 will be described. This is a path for dubbing from the HDD to the optical disk. After the TS stream from the terminal 56 is converted to a PS stream by the TSPS conversion circuit 54, the TS stream is output to the terminal 57 via the switch 53, and the PS format stream is sent to the disk drive interface 6.

Next, the path indicated by the one-dot chain line 59 will be described. During playback, the playback signal from the optical disc is PS
It is. The PS input from the terminal 56 is converted into a TS by the PSTS conversion circuit 51, output to the terminal 57 via the switches 52 and 53, and a signal is sent to the disk drive interface 6. When recording an external input, the PS converted by the MPEG encoder is supplied to the terminal 56.
And converted into a TS by the PSTS conversion circuit 51. Thereafter, the output terminal 57 is connected via the switches 52 and 53.
And a signal is sent to the disk drive interface 6.

Finally, the path indicated by the two-dot chain line 60 will be described. When recording directly on an optical disc, M
The PS converted by the PEG encoder is input from a terminal 56 and output directly to an output terminal 57 via switches 52 and 53. That is, a signal is sent to the disk drive interface 6 without passing through the PSTS conversion circuit 51.

FIG. 5 shows an embodiment in which the HDD is built in the digital tuner. 65 is a digital tuner, 66 is a digital tuner block, 67 is an HDD, 68 is a digital interface,
Reference numeral 69 denotes an optical disk recording / reproducing apparatus, and reference numeral 80 denotes an interface block. The other components are the same as those of the embodiment shown in FIG. In addition, HDD
It is assumed that recording and reproduction to and from the digital tuner are performed, and a description thereof will be omitted.

First, recording from the digital tuner 65 to the optical disk recording / reproducing device 69 will be described. Regardless of whether the signal from the digital tuner 65 has passed through the HDD 67 or not, a multiplexed stream in TS format is output via the digital interface 68. The TS input from the terminal 17 is converted into PS by the TS / PS conversion circuit 7 and then sent to the disk drive again via the disk drive interface 6 and the data bus 11 to be written on the optical disk. Memory 9 is TS / P
It is used to temporarily store data during S conversion.

Next, reproduction of the optical disk recording / reproducing device 69, particularly output to the digital tuner 65 will be described. The PS reproduced from the disk drive 5 is converted to a TS by the TS / PS conversion circuit 7 via the data bus 11 and the disk drive interface 6. Then, the data is again sent to the digital interface 2 via the disk drive interface 6 and the data bus 11. The playback signal output from the terminal 17 is a digital B
The TS is sent to the S tuner 65 to be decoded.

Also in this embodiment, the same effects as in the embodiment shown in FIG. 1 can be obtained by performing recording / reproduction on the digital tuner 65 side via the HDD 67. Further, in the present embodiment, the TS / PS conversion circuit is provided in the optical disk recording / reproducing device 6, but may be provided in the digital tuner 65.

FIG. 6 shows an embodiment in which an independent HDD is externally attached to the optical disk recording / reproducing device 77 by a dedicated cable. There are various types of dedicated cables, but here, a description will be given of a scuzzy (SCSI) cable as an example. 76 is an HDD device, 75 is a SCSI interface, and 80 is an interface block.
This embodiment is different from the embodiment shown in FIG. 3 only in that the HDD interface 3 is changed to the SCSI interface 75 and the HDD 4 is changed to the external HDD device 76. Therefore, the operation is almost the same as that of the embodiment of FIG. 3, and the TS is recorded on the HDD device 76 as it is, and the PS is recorded on the optical disk.

Next, the configuration of the optical disk drive 5 in the recording / reproducing apparatus according to the embodiment of the present invention shown in FIGS. 1 and 3 will be described.

When an optical disk of a type capable of recording and reproducing data on both sides is used in the recording / reproducing apparatus for long-time recording, when one surface is completed, the other surface is artificially or mechanically used. It is necessary to switch to In the embodiment shown in FIG. 7, the position of the pickup is mechanically set to the surface,
It is switched on the back side.

Here, 81 is an optical disk, 82 is a motor shaft, 83 is a spindle motor, 84 is an optical lens, 85
Is a pickup, 86 is a lead screw, 87 is a stepping motor, 88 is a fixed part of the stepping motor,
89 is a stepping motor moving mount, 90 is a recording / reproducing amplifier, 91 is a disk signal processing circuit, and 92 is an AT.
An API processing circuit, 93 indicates a pickup control circuit, 94 indicates a microcomputer, and 95 indicates an input / output terminal.

First, the servo control will be briefly described. The rotation of the optical disk 81 is controlled by a spindle motor 83, while the lead screw 86 connected thereto moves under the control of a stepping motor 87, and the pickup 85 fixed to the lead screw 86 moves to write or read on the optical disk. The position is almost determined. Further, fine control is performed by a control mechanism inside the pickup. At the time of recording and reproduction, the reflected light from the optical disk 81 is read out through the optical lens 84 and the pickup 85, amplified by the recording / reproduction amplifier 90, sent to the pickup control circuit 93, and based on the information, the stepping motor is read. Feedback control is performed on the signal 87 by the control signal (A).

The recording / reproducing process is as follows. At the time of recording, the recording information (MP
The EG stream) is processed by the ATAPI processing circuit 92 and then converted into a recording signal by the optical disk signal processing circuit 91. Then, the laser beam is sent to the pickup 85 via the recording / reproducing amplifier 90, and the laser beam is irradiated through the optical lens 84, so that the recording is performed on the optical disk 81. At the time of reproduction, the reflected light from the optical disk 81 is read by the pickup 85 via the optical lens 84 and then amplified by the recording / reproducing amplifier 90. Then, the stream is returned to the MPEG stream by the optical disk signal processing circuit 91 and output to the terminal 95 via the ATAPI processing circuit 92. Microcomputer 94
Controls the ATAPI processing circuit 92, the optical disk signal processing circuit 91, and the pickup control circuit 93.

In this embodiment, at the time when the recording or reproduction of the front surface is completed, a command for movement is issued to the fixed portion 88 of the stepping motor by the signal (b) from the microcomputer 94. Then, based on the command, the pickup part moves upward (back side) as shown by a dotted arrow.

However, even if the front and rear surfaces are mechanically switched in this way, it takes time to switch. For this reason, for example, an external input signal such as a television broadcast flowing in real time cannot be directly written on an optical disc. In the present embodiment, an external input signal is recorded via an HDD, so that the signal is recorded on an optical disk in a time-shifted state for a predetermined time. Thus, even if it takes time to switch between the front and back surfaces of the optical disk, signals can be recorded continuously.

The recording process on the optical disk via the HDD when switching from the front side to the back side will be described with reference to FIG. (A) shows an operation state. For example, when a TS from a digital tuner is input in real time, the TS is continuously recorded on the HDD as shown in (d). Thereafter, as shown in (e), the data is read out from the HDD after being time-shifted by the pickup movement period, and
The data is converted into PS by the SPS conversion circuit and is written on the optical disk. By doing so, the streams P1,..., P5, P6, P7, P8, P
9 can be recorded continuously without being divided between P7 and P8.

Actually, there is a delay of Tr from writing to reading to the HDD, and it takes Td as a time to read from the HDD, convert to PS, and record on the optical disk. Therefore, it is necessary to limit the reading from the HDD in order to manage the remaining amount of the disk and to prevent writing on the optical disk during the pickup moving period. In the present embodiment, the management is performed by the control signal (b). That is, when the pickup 85 starts moving (arrow 113), the writing to the optical disk has already been completed as indicated by the arrow 116.
Writing to the optical disk starts again from the point where the movement of the pickup is completed and the recording preparation on the back side is completed (arrow 117), and recording is started from P8 with a delay of Td. As described above, by controlling the writing and reading of the HDD, it is possible to realize recording on the front and back surfaces of the optical disk in a state where the time is shifted only by the time when the pickup 85 moves, that is, in a state close to real time.
The above description has been made on the assumption that the front and back of the optical disc are mechanically read. However, even when the front and back of the optical disc are artificially switched, continuous recording on the optical disc becomes possible by similarly passing through the HDD.

Referring to FIG.
Another embodiment will be described. In this embodiment, two optical lenses, a pickup, a lead screw, and a stepping motor are provided independently for the front and back surfaces of the optical disk. When recording is performed on the front surface, an optical lens 84, a pickup 85, a lead screw 86, and a stepping motor 87 are used, and are controlled by a control signal (B) from a pickup control circuit 93. Similarly, when recording on the back surface, the optical lens 9 is used.
6, a pickup 97, a lead screw 98, and a stepping motor 99 are used.
3 is controlled by a control signal (C). The recording timing is almost the same as the case described with reference to FIG. Instead of losing the time corresponding to the pickup movement period, a delay corresponding to the switching time for switching between the two pickup units occurs. In order to record the signal during the switching time without any loss, recording is performed on the optical disk via the HDD as in the embodiment shown in FIG. Since the switching time is shorter than that of the embodiment shown in FIG. 7, writing and reading by a semiconductor memory instead of an HDD can be sufficiently realized.

FIG. 9 shows another embodiment of the optical disk drive 5. In this embodiment, a plurality of optical disks to be recorded are not of the double-sided type but of the single-sided type in the autochanger 100 and are sequentially recorded. For example, the description will be made assuming that three optical discs 81, 101, and 102 are stored in the autochanger 100. An optical lens 84 for the first optical disc 81,
Recording is performed by the pickup 85, the lead screw 86, and the stepping motor 87. When recording on the second optical disc 102 after the first disc is completed,
It takes time for the replacement work. As in the embodiment shown in FIG. 7, it is possible to perform long-time recording on an optical disk in a state close to real time via the HDD.
The recording timing is almost the same as the case described with reference to FIG. 10, except that the pickup movement period 111 is changed to the optical disk replacement time.

Next, the operation at the time of reproduction will be described with reference to FIG. In the device capable of recording and reproducing the double-sided disk shown in FIGS. 7 and 8 or the device capable of recording and reproducing a plurality of single-sided disks by the autochanger shown in FIG. If the reproduction signal is not changed, discontinuity occurs. As with the recording, such a problem can be solved by interposing the HDD. Here, the embodiment of FIG. 7 will be described as an example.

As shown in (h), if the PS reproduced from the optical disk is to be output as a reproduction output as it is, it cannot be read during the pickup movement period, and the data will be discontinuous as it is. Therefore, in the present embodiment, reproduction is performed as follows in order to perform continuous reproduction.
That is, as shown in (i), for example, when the pickup 85 starts moving after the reproduction of the stream P7 in the PS format ends (the arrow 125 indicates the movement start time), the stream T7 in the TS format converted from the P7 is transmitted. It is generated with a delay of Td and recorded on the HDD. Thereafter, when the movement of the pickup is completed (arrow 126), the stream P
8 is read from the optical disc and converted to T8, then H
Recorded on DD. By shifting the stream in TS format recorded on the HDD by the time Ts and reading it continuously in this way, it is possible to output a continuous signal as shown in (j).

As described above, according to the present embodiment, although the moving period of the pickup 85 is time-shifted, the reproduction operation is performed in a state close to real time with respect to the time operated by the user without interruption of the video and audio. It can be realized. In the present embodiment, the data is converted into a TS, but a method in which the data is recorded on the HDD with the PS as it is may be used. Since the operation is substantially the same as that of the embodiment shown in FIGS. 8 and 9, the description is omitted.

FIG. 18 shows that the reproduced image of the optical disk is always HD.
9 shows the relationship between the playback time and the playback state when outputting via D. In the graph shown in FIG. 18, the horizontal axis represents time, and the vertical axis represents a recording state. A period indicated by 142 indicates a pickup moving period and a disk switching period by an autochanger. A period 146 is a front surface reproduction period when the optical disk is reproduced at the normal speed, and a period 147 is a rear surface reproduction period when the reproduction is performed at the normal speed. In order to avoid the discontinuous period 142, the optical disk is reproduced at a speed slightly faster than the real-time reproduction (reproducing at a normal speed), and before the discontinuous period 142 comes, the reproduction of the surface of the optical disk is completed. Record. H recorded
By reproducing the contents of the DD almost simultaneously with the recording in real time, the discontinuous period 142 can be avoided and real-time reproduced images and sounds can be output. During the period of 142, the reproduction of the optical disk is completed, and during this period, the movement of the pickup or the replacement of the disk by the autochanger may be performed. Similarly, the back side is reproduced from the optical disk at high speed during the period 143 and recorded on the HDD.
At the same time, the data is reproduced from the HDD in real time. A period 144 is a period during which the optical disk is stopped. Dotted line 1
Numeral 45 indicates a state reproduced in real time from the HDD. By doing so, long-time software can be reproduced in real time without discontinuity.

Next, when writing cannot be performed on the optical disk, for example, only during the recording period during the switching period between the front surface and the rear surface or during the disk switching period by the autochanger,
An embodiment in which writing is continuously performed on an optical disk using an HDD will be described. FIG. 12 shows a reproduction process in the case of switching from the front surface to the back surface of the optical disc and reproducing the data as in the embodiment shown in FIG. 7, for example.
(C) is a signal indicating a pickup moving period,
(K) is a stream in TS format input from a digital tuner or the like. This is represented by PS as shown in (l).
It is converted to a stream in the format and recorded directly on the optical disc. The delay time required for the conversion at this time is Tr1.
The streams Pa to Pg can be recorded in real time, but the signal Th located during the pickup movement period
~ Ts (130) cannot be recorded. So 13
As shown in FIG. 2, streams from Th to Ts are temporarily recorded on the HDD. The delay time required at this time is Tr2. When the movement of the pickup is completed and the recording of the back surface is started, Th to Ts are read from the HDD, and the recording of Ph to Ps is performed on the optical disk at high speed. In the present embodiment, recording on the optical disk is performed at about twice the speed.
At the time point indicated by, catches up with the real-time information, and switches directly to recording on the optical disk from Tt.

As described above, if it is possible to increase the recording rate up to about twice the speed, for example, three-sided switching is required.
When 0 seconds are required, the recording rate increases for about 30 seconds, and catches up with a real-time input signal after about 1 minute.
If the recording rate is twice or less, the backup period by the HDD is extended by that much. By backing up only the vicinity of the pickup movement period as described above, the end of the recording is completed at the same time as the broadcast time, so that the recording can be realized without discomfort. Also, since it is limited to a short time, it is not a large-capacity recording medium such as an HDD,
A semiconductor memory or the like can be sufficiently backed up and cost can be reduced.

Next, with reference to FIG. 17, a method for compensating for discontinuity in switching between the front and back surfaces during recording via the HDD will be described. After managing the remaining amount of the optical disk, a read signal from the optical disk indicated by (n) is read at a high speed within a range in which the optical disk can reproduce at a time Tb before the point 113 where the pickup starts to move, and at the same time, the HD
Recorded in D (indicated by (o)). Here, signals read from the optical disc at a normal speed are Pa to Pg,
The signals read at high speed are Ph to Ps indicated by 134. In order to increase the speed of recording / reproducing to / from the HDD, the Tr3 stream is read from the optical disc in the PS format.
The recording is performed as in 135 with only a delay. As described above, while recording is performed on the HDD, reading is performed at the same speed as when reading from the optical disk normally, and reproduction is performed as indicated by 136 with a delay of Tr4. At this time,
Since a time (Tr3 + Tr4) required for recording / reproducing to the HDD is generated, a blank portion is generated as shown by 137, but the time is less than 1 second, which is not a serious problem. Point 11 when the movement of the pickup is completed
In 7, by shifting from the reproduction of the HDD to the reproduction of the optical disk, the video and the audio can be reproduced in real time without interruption. The flow of the entire stream is shown in (q).

As described above, when only the pickup movement period is interpolated, the interpolation can be realized with a limited capacity to some extent, so that a semiconductor memory or the like can be used, and the cost can be reduced. Although the above description has been made with reference to the embodiment shown in FIG. 7, it can also be applied to a case where a disc is replaced by an autochanger, as in the embodiment shown in FIG.

Next, a description will be given of an embodiment in which package software or digital broadcasting for which copying is restricted is recorded on an optical disk via an HDD. Generally, copy management is performed for video / audio software from the viewpoint of copyright protection. For example, a copy guard management system (hereinafter abbreviated as CGMS) is specified by 2 bits, 00 is copy free, 10 is copy permitted once, and 11 is copy prohibited. In the case of copy free and copy prohibition, the instructions may be followed. However, when it is possible to copy once, there is no problem to copy to one recording medium.
When recording on an optical disc via DD, 2
Copying to individual recording media may result in copyright infringement. Therefore, information temporarily recorded on the HDD is erased after recording on the optical disk.

The algorithm will be described with reference to the flowcharts shown in FIGS. First, in FIG. 13, a part of the input signal is temporarily recorded in the HDD. After that, the signal read from the HDD is converted by the TSPS conversion circuit and recorded on the optical disc. If some of the recorded information has not been completely recorded, the process returns to the HDD recording again. If the recording has been completed, it is checked whether or not the recording on the optical disk has been normally performed, and then, some of the information is erased. Then, the process returns to the HDD recording for the next information recording. By doing so, the information in the HDD is erased after recording while recording on the optical disk, and no information remains on the HDD at the same time after the recording is completed. Next, in FIG. 14, after the recording of the entire program to be recorded is completed, it is checked whether or not the recording has been normally performed on the optical disk, and then the entire program recorded on the HDD as a backup is erased and completed. Thus, as a result after the recording is completed, no information remains on the HDD as in FIG. As described above, by deleting the backup information of the HDD after recording it on the optical disk, a single copy can be realized without violating copyright protection.

Next, an embodiment in which a further function is added to the erase function described with reference to the flowchart shown in FIG. 14 will be described with reference to FIG. That is, at the time when the recording on the optical disc is completed, the head portion or the representative scene of the recorded image is recorded in another area of the HDD,
The information recorded on the DD is deleted.

FIG. 16 shows an example of the memory configuration of the HDD. 140 indicates a memory space. For example, address aa
Image and sound are temporarily recorded in the area starting from aa,
From there, it is reproduced again and recorded on the optical disk. Part of the image recorded from address aaa when recording is completed,
For example, a head portion and a representative portion are recorded in an index image recording area starting from the address bbbb. The area starting from the address cccc is another optional area. When recording the index image on the HDD, the number (identification code) of the optical disk storing the moving image corresponding to the index image is recorded on the optical disk and the HDD. Thus, even when index images of a plurality of optical disks are stored, it is possible to recognize on which optical disk a desired movie or the like is recorded. Further, by inputting the identification code, the recorded contents of the optical disk can be confirmed.

In addition to the index screen, position data indicating the recording position on the optical disk may be recorded on the HDD. According to this embodiment, even when a plurality of programs and movies are recorded on one recording medium, the position data can be recognized and the desired program can be reproduced by selecting the index screen. Further, even when an index screen is recorded for each scene such as a movie, a desired scene can be easily reproduced.

As described above, by recording a part of the image recorded on the optical disk in the HDD, it can be effectively used for searching for the recorded program. Also, here, the description has been given of the case where the index image is recorded in another area of the HDD, but the index image may be recorded in a specific area of the optical disk.

As described above, the present embodiment has been described on the premise that an optical disk is used as a removable recording medium. However, the present invention includes a medium such as a magneto-optical disk and a semiconductor memory such as a memory card and a magnetic tape. Are also within the scope of the invention. Further, although the description has been made on the assumption that the HDD is used as the fixed recording medium, another recording medium that cannot be removed, for example, a semiconductor memory may be used.

In this embodiment, the digital signal coming from the outside has been described as a TS from a digital tuner. However, a signal input via a modem or input via another digital interface has been described. It is also effective for signals and is not specified. Also,
In a set that does not need to return a signal to a digital tuner by a digital interface, that is, a set that has only analog input / output, there is no need to record on the HDD with TS. As described above, the recording format on the HDD may be recorded in both TS and PS formats depending on the application.

As described above, according to the embodiment of the present invention, when recording on a removable medium such as an optical disk recordable from a digital tuner having a different target stream format, an HDD capable of high-speed writing / reading is used. By doing so, it is possible to achieve excellent mobility and improved usability in exchange with a digital tuner, storage in a removable medium, and reproduction. In particular, there is an effect that the recording / reproducing and dubbing functions in a mixed system of a removable medium and a non-removable medium are enhanced.

In the case where signals from a digital tuner input in real time are continuously recorded on an optical disk capable of double-sided recording or a plurality of optical disks which can be replaced by an autochanger mechanism, high-speed writing / writing is performed.
By performing the operation via a readable HDD or the like, recording can be performed in a state close to real time. In addition, during reproduction, discontinuous periods such as front and back side switching and a switching period by an autochanger are absorbed, and continuous reproduction output can be realized. As a result, it is possible to realize continuous and long-time recording on a disk medium, a tape medium, or the like, and to improve usability such as continuous reproduction.

Also, when recording on an optical disk while recording on two recording media, there is also an advantage that it can be realized without infringing copyright. Further, there is an effect that a recording method effective for a search using an index image or the like can be provided.

[0061]

According to the present invention, it is possible to provide a recording / reproducing apparatus in which the format of a multiplex stream is considered. Also,
It is possible to provide a recording / reproducing device capable of continuously recording a signal transmitted in real time on a recording medium or continuously reproducing a signal recorded on the recording medium. Also,
It is possible to provide a recording / reproducing apparatus in consideration of usability and copy protection.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating the principle of TSPS conversion in the embodiment of the present invention.

FIG. 3 is a block diagram of a recording / reproducing apparatus according to an embodiment of the present invention to which a function of recording / reproducing a digital signal which is MPEG-encoded with respect to an external video input signal is added.

FIG. 4 is a block diagram illustrating a specific example of a TS / PS conversion circuit according to an embodiment of the present invention.

FIG. 5 is a system configuration diagram showing an embodiment when an HDD is built in the digital tuner side.

FIG. 6 is a system configuration diagram showing an embodiment in a case where an independent HDD is externally attached to an optical disk recording / reproducing device via a dedicated cable.

FIG. 7 is a system configuration diagram of a disk drive device according to an embodiment of the present invention.

FIG. 8 is a system configuration diagram of a disk drive device according to an embodiment of the present invention.

FIG. 9 is a system configuration diagram of a disk drive device according to an embodiment of the present invention.

FIG. 10 is a diagram showing a recording process in the embodiment of the present invention when switching from the front surface to the back surface of the optical disc.

FIG. 11 is a diagram showing a reproducing process in the embodiment of the present invention when switching from the front surface to the back surface of the optical disc.

FIG. 12 is a diagram illustrating a recording process in the embodiment of the present invention when switching from the front surface to the back surface of the optical disc.

FIG. 13 is a flowchart illustrating an embodiment of an erasing operation of the HDD after recording on the optical disc.

FIG. 14 is a flowchart showing an embodiment of an erasing operation of the HDD after recording on the optical disc.

FIG. 15 is a flowchart illustrating an erasing operation of the HDD and a movement of an index image after recording on the optical disc according to the embodiment of the present invention.

FIG. 16 is a schematic diagram illustrating a memory space of an HDD according to an embodiment of the present invention.

FIG. 17 is a diagram showing a reproducing process in the embodiment of the present invention when switching from the front surface to the back surface of the optical disc.

FIG. 18 is a diagram illustrating a relationship between a reproduction time and a reproduction state when reproducing an optical disc in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Recording / playback apparatus 4 ... HDD 5 ... Disk drive 7 ... TS / PS conversion circuit 11 ... Data bus 22, 65 ... Digital BS tuner 51 ... PSTS conversion circuit 54 ... TSPS conversion circuit 69, 77 ... Optical disk recording / playback apparatus 76 ... HDD device 81, 101, 102 optical disk 91 disk signal processing circuit 93 pickup control circuit 100 autochanger 140 HDD memory space

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/765 H04N 5/92 H 5/781 5/781 510F 5/85 5/91 P 5/91 F Terms (reference) 5C052 AA01 AA02 AB04 CC11 DD04 5C053 FA13 FA15 FA23 GB37 HA32 LA07 5D044 AB07 BC01 BC04 BC08 CC04 DE04 DE28 DE50 EF03 EF05 FG18 GK12 HH02 HL08

Claims (25)

[Claims] 1. A conversion means for converting a digital signal of a first format into a digital signal of a second format; a first recording and reproducing mode for recording and reproducing the digital signal of the first format on a recording medium; A second recording / reproducing mode for recording / reproducing the digital signal of the second format on / from a recording medium. 2. A conversion means for converting between a signal of a first format and a signal of a second format, and a control means for controlling recording and reproduction of a signal on a first recording medium and a second recording medium. The control means controls to record and reproduce the signal of the first format on the first recording medium and record and reproduce the signal of the second format on the second recording medium. A recording / reproduction control device characterized by the above-mentioned. 3. The signal according to claim 1, wherein the signal of the first format is a transport stream specified by MPEG, and the signal of the second format is a program stream specified by MPEG. Alternatively, the recording / reproduction control device according to claim 2. 4. The recording / reproduction control device according to claim 1, wherein the recording / reproduction control device controls recording / reproduction on the recording medium in an external recording / reproduction device. 5. A non-removable recording medium for recording a signal of a first format input from the outside, converting a signal reproduced from the non-removable recording medium into a signal of a second format, Recording control means for controlling recording on a recording medium so as to record a signal of the format (1) on a removable recording medium. 6. Reproducing a signal from a removable recording medium, converting the reproduced signal, recording the converted signal on a non-removable recording medium, and transmitting a signal reproduced from the non-removable recording medium to an external device. Reproduction control means for controlling reproduction of a signal from a recording medium so as to output the reproduction control signal to the recording medium. 7. A first digital signal input from the outside is received, the first digital signal is recorded on a first recording medium, and a first digital signal reproduced from the first recording medium is received by a first digital signal. A recording method, comprising: converting the digital signal into a second digital signal; and recording the second digital signal on a second recording medium. 8. A method of converting a signal reproduced from a removable recording medium, recording the converted signal on a non-removable recording medium, and outputting a signal reproduced from the non-removable recording medium to an external device. Characteristic playback method. 9. An input means for receiving a digital signal, a first recording means for recording the inputted digital signal on a first recording medium, and a reproducing means for reproducing a signal from the first recording medium. And a second recording means for recording a signal reproduced by the reproducing means on a second recording medium. 10. The recording medium according to claim 1, wherein said first recording medium is a recording medium capable of continuously recording signals, and said second recording medium is a recording medium having a period in which recording cannot be continuously performed for a predetermined period. 10. The recording device according to claim 9, wherein 11. A reproducing means for reproducing a signal from a removable recording medium, a recording means for recording a signal reproduced by the reproducing means on a non-removable recording medium, and a signal read from the non-removable recording medium. A reproducing apparatus comprising: an output unit that outputs a signal. 12. The non-removable recording medium according to claim 11, wherein said output means outputs a signal read from said non-removable recording medium with a time shift during a period when said signal cannot be reproduced from said removable recording medium. A playback device according to claim 1. 13. The reproducing apparatus comprises control means for controlling the output means, wherein the control means reads the signal from the non-removable recording medium when the signal cannot be reproduced from the removable recording medium. The reproducing apparatus according to claim 11, wherein the output unit is controlled to output a signal. 14. A control means for controlling recording / reproduction of a signal on a first recording medium capable of continuous recording / reproduction and recording / reproduction of a signal on a second recording medium having a period in which recording / reproduction cannot be continuously performed for a predetermined period. A recording / reproduction control device, comprising: 15. The first recording medium records a signal reproduced from the second recording medium on the first recording medium, and time-shifts the signal during a period in which recording and reproduction cannot be continuously performed for the predetermined period. 2. A control method for outputting a signal reproduced from a medium to an external device.
5. The recording / reproduction control device according to 4. 16. The control means records a signal reproduced at a high speed from the second recording medium on the first recording medium, and outputs a signal reproduced at a normal speed from the first recording medium to an external device. 2. An output to the first device.
5. The recording / reproduction control device according to 4. 17. The apparatus according to claim 14, wherein a signal reproduced from the first recording medium is recorded on the second recording medium at a high speed for a predetermined period after the period in which recording and reproduction cannot be continuously performed for the predetermined period. Recording and playback control device. 18. The control means records a signal input from the outside on the first recording medium, and outputs a signal reproduced from the first recording medium after a period in which recording and reproduction cannot be continuously performed for the predetermined period. 15. The recording / reproduction control device according to claim 14, wherein the recording / reproduction control device performs control so as to record on a recording medium. 19. The recording medium according to claim 14, wherein the second recording medium is a recording medium capable of recording on both sides, and the period in which recording and reproduction cannot be performed continuously for a predetermined period is a switching period between a front surface and a back surface. 19. The recording / reproduction control device according to claim 18. 20. An automatic changer mechanism capable of storing a plurality of said second recording media and exchanging each of them, and wherein the period in which recording and reproduction cannot be performed continuously for a predetermined period is a period for exchanging the second recording media. The recording / reproduction control device according to any one of claims 14 to 18, wherein 21. Before erasing information recorded on the first recording medium, a part of the information is moved to another area of the first recording medium or recorded on the second recording medium. The recording / reproduction control device according to any one of claims 14 to 18, wherein 22. The recording medium according to claim 2, wherein said first recording medium is a non-removable recording medium, and said second recording medium is a removable recording medium. A recording / reproduction control device according to any one of the above. 23. An input signal is recorded on the first recording medium, a signal reproduced from the first recording medium is recorded on a second recording medium, and information recorded on the first recording medium is recorded. A recording method characterized by erasing. 24. The method according to claim 23, wherein a part of the information is recorded on the first recording medium or the second recording medium before erasing the information recorded on the first recording medium. Recording method. 25. A recording / reproducing control apparatus for recording / reproducing on / from two recording media, wherein a first recording medium capable of continuously recording / reproducing and a second recording medium having a period in which recording / reproducing cannot be continuously performed for a predetermined period. Recording / reproduction control means for controlling recording / reproduction for recording a signal input from outside during recording on the first recording medium, and performing the first recording after a period in which recording / reproduction cannot be continuously performed for the predetermined period. A recording / reproduction control device for recording a signal reproduced from a medium on a second recording medium.