JP2002290892A - Digital recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit a title to be easily copied and moved from a hard disk to a magneto-optical disk in a digital recorder/reproducer for recording and reproducing digital data. SOLUTION: Automatic library generating information is read from the magneto-optical disk which is mounted on an MO drive 130, the title which coincides with information such as a title name and a category in the automatic library generating information is read from a HDD 119, and then, the title is copied or moved to the magneto-optical disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital recording / reproducing apparatus using a removable recording medium such as a hard disk and a magneto-optical disk. The present invention relates to an apparatus that can easily copy.

[0002]

2. Description of the Related Art Hitherto, as a recording and reproducing apparatus for data such as a television signal, a digital recording and reproducing apparatus using a randomly accessible recording medium such as a magneto-optical recording medium and a hard disk has been proposed. In these digital recording / reproducing apparatuses, for example, as disclosed in JP-A-8-138318, one system recording channel and one system reproducing channel are provided, and a recording operation is performed on a recording medium. A device having a function of reproducing recorded data while executing it has been proposed.

[0003] Due to the increase in the capacity of the recording medium and the development of compression techniques for video data and the like, an enormous number of files are generated on the recording medium of a digital recording / reproducing apparatus capable of recording a large number of television programs. It is easy to guess. When managing an enormous number of titles generated in this way and performing processes such as search, unique and unified information is required. In addition, it is necessary that the title information is easy for the user to understand when displaying the information.

[0004] For example, when a user starts recording or makes a reservation, the user can input information such as a program name to record information for displaying the contents of the title in an easily understandable manner. Each time a recording instruction is issued, an input is required, and the user is troublesome. For this reason, the present applicant has filed Japanese Patent Application No.
No. (application date: December 8, 1999), it is possible to obtain information for managing titles without increasing the user's trouble, and record the information of the titles together with the titles. We proposed a digital recording and playback device that displays titles to the user when it is easy to manage titles.

[0005]

By the way, in a digital recording / reproducing apparatus capable of handling a hard disk and a magneto-optical disk, it is also desired to arrange and classify titles recorded on the hard disk and to store the titles on the magneto-optical disk. ing. Heretofore, regarding the creation of such a so-called library, a user displays a list of titles recorded on a hard disk on a television monitor or the like, selects necessary ones from the list, and copies them to a magneto-optical disk. Operations were generally performed.

However, the operation is troublesome when many titles have to be copied, and when the titles are to be erased from the hard disk after the titles have been copied to the magneto-optical disk, the operation becomes more troublesome. There has been a demand for a device that can easily perform such operations.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a first recordable and readable digital data including a video / audio signal and management information corresponding to the video / audio signal. Means for writing and reading digital data to and from a second recording medium capable of writing and reading digital data including a video / audio signal and management information corresponding to the video / audio signal and being detachable A digital recording / reproducing apparatus having means for writing and reading digital data.
Predetermined information recorded on the recording medium, means for retrieving management information of the first recording medium based on the predetermined information, and digital data from the first recording medium based on the retrieval result. Reading data and writing the data to the second recording medium.

The present invention also provides means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video / audio signal and management information corresponding to the video / audio signal. Means for writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal, and for writing and reading digital data to and from a removable second recording medium In the digital recording / reproducing apparatus, predetermined information recorded on the second recording medium,
Means for retrieving management information of the first recording medium based on the predetermined information, and reading digital data from the first recording medium and writing the digital data on the second recording medium based on the search result In addition, the digital data of the first recording medium written on the second recording medium is deleted.

The present invention also provides means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video / audio signal and management information corresponding to the video / audio signal. Means for writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal, and for writing and reading digital data to and from a removable second recording medium In the digital recording / reproducing apparatus, predetermined information recorded on the second recording medium,
Means for retrieving management information of the first recording medium based on the predetermined information, and reading digital data from the first recording medium and writing the digital data on the second recording medium based on the search result In addition, an inquiry is made as to whether or not to delete the digital data of the first recording medium written on the second recording medium.

In the present invention, the predetermined information is a name given to digital data. Further, in the present invention, the predetermined information is a genre assigned to digital data.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. [Overall Configuration of Digital Recording / Reproducing Apparatus] FIG. 1 is a block diagram showing a basic overall configuration of a digital recording / reproducing apparatus according to an embodiment of the present invention. In the figure, signal lines indicated by thick lines are signal lines indicating the flow of video and / or audio data, and signal lines indicated by thin lines are signal lines indicating the flow of control signals.

Referring to FIG. 1, a signal wave of, for example, a television broadcast received by antenna 100 is transmitted to tuner 1.
02 and 103 are commonly provided. Tuner 102
Selects a signal wave of one channel specified by the user from the signal wave received by the antenna 100, demodulates the signal wave into an analog television signal including a video signal and an audio signal, and supplies the demodulated signal to one input of the selector 104. give. The other input of the selector 104 is connected to an external input terminal 101 to which various external television signal sources such as a video tape recorder (VTR) and a camcorder can be connected.

The selector 104 selects either the output from the tuner 102 or the input from the external input terminal 101 and supplies it to the A / D converter 105 and also to one input of the graphic controller 124.
Generally, the selector 104 selects the input from the external input terminal 101 when some external signal source is connected to the external input terminal 101, and selects the output of the tuner 102 when not connected.

The A / D converter 105 includes a selector 10
The video signal and the audio signal of the analog television signal output from 4 are converted into digital signals, and the digital video signal is supplied to the MPEG2 video encoder 107 and the digital audio signal is supplied to the audio encoder 109. MPEG2 video encoder 10
7 compresses the given digital video signal and provides it to the multiplexer / demultiplexer 111, and the audio encoder 109 compresses the provided digital audio signal and provides it to the multiplexer / demultiplexer 111. The multiplexer / demultiplexer 111 multiplexes the supplied video signal stream and audio signal stream and converts them into an MPEG2 system stream.

On the other hand, the tuner 103 includes the antenna 100
1 from the signal wave received by
A channel signal radio wave is selected, demodulated to an analog television signal composed of a video signal and an audio signal, and A
The signal is supplied to the / D converter 106 and another input of the graphic controller 124. A / D
The converter 106 converts the video signal and the audio signal of the analog television signal output from the tuner 103 into digital signals, respectively, and converts the digital video signals into M signals.
The digital audio signal is supplied to the audio encoder 110 while being supplied to the PEG2 video encoder 108.

The MPEG2 video encoder 108 compresses a given digital video signal and performs a
The audio signal is supplied to the demultiplexer 111, and the audio encoder 110 compresses the supplied digital audio signal and supplies the compressed digital audio signal to the multiplexer / demultiplexer 111. The multiplexer / demultiplexer 111 multiplexes the supplied video signal stream and audio signal stream and converts them into an MPEG2 system stream.

The digital recording / reproducing apparatus includes an HDD 1
19 and an MO (Magneto Optical) drive 130 for reading and writing on a magneto-optical disk, which is an example of a removable recording medium. Writing and reading data to and from the HDD 119 and the MO drive 130
Writing and reading of data to and from the HD are performed by the HD / MO controller module 118.

The multiplexer / demultiplexer 111 and the HD / MO controller module 11
8, the first memory including the buffer memory 116 in the middle
, A second data bus including a buffer memory 117 in the middle, and a third data bus including a buffer memory 131 in the middle.

Further, digital data from another externally connected device can be input to the buffer memory 116 via the digital input 128, while the digital data in the buffer memory 117 is the digital output 1
29, it is possible to output to another device externally connected. Therefore, as described later, the multiplexer / demultiplexer 111 and the HD / MO controller module 118 via the buffer memories 116 and 117.
, And the digital input 128 and the digital output 129 exchange MPEG2 system stream data.

Multiplexer / Demultiplexer 111
Is the M received from buffer memories 116 and 117
The PEG2 system stream is demultiplexed into a video signal stream and an audio signal stream, and the former is supplied to an MPEG2 video decoder 112 and the latter to an audio decoder 113. The MPEG2 video decoder 112 decodes the supplied video signal stream and supplies it to the D / A converter 114. The audio decoder 113 decodes the supplied audio signal stream and supplies it to the D / A converter 114. The D / A converter 114 converts the applied signals into analog signals, respectively, and supplies an analog television signal including a video signal and an audio signal to another input of the graphic controller 124.

The graphic controller 124 includes a selector 104, a tuner 103, and a D / A converter 1
14 and select one of the analog television signals given to the television monitor 126 connected to the outside of the digital recording / reproducing apparatus. The operations of the multiplexer / demultiplexer 111 and the graphic controller 124 are controlled by control signals provided from the system controller 120.

The digital recording / reproducing apparatus includes a digital input 128 and a digital output 129.
Control signal from the system controller 120 is connected to a system controller (not shown) of another device via the digital input 128 (thin line) when the external device is connected to the system controller (not shown). Is supplied to the system controller 120 of the digital recording / reproducing apparatus via the digital output 129 (thin line).

A user interface 122, a memory 121, and a real-time clock module 127 are connected to the system controller 120. The basic operation principle of the digital recording / reproducing apparatus according to the present invention shown in FIG. 1, such as recording, reproducing, erasing, etc., will be described later in detail in relation to the file format of the hard disk and magneto-optical disk used in the present invention. First, the characteristic operation of the present invention will be described with reference to FIG.
Will be described with reference to the block diagram of FIG.

According to the embodiment of the present invention, as shown in FIG. 1, the digital recording / reproducing apparatus has at least two MPEG2 encoding circuits (MPEG2 video encoders 107 and 108) and at least two MPEG2 decoding circuits. 1 system (MPEG2 video decoder 11
2) It is possible to simultaneously operate any two of these systems while maintaining real-time properties.

According to the embodiment of the present invention, as shown in FIG. 1, the digital recording / reproducing apparatus has at least two MPEG2 encoding circuits (MPEG2 video encoders 107 and 108) and at least one MPEG2 decoding circuit. System (MPEG2 video decoder 11
2) It is possible to simultaneously operate any two of these systems while maintaining real-time properties.

The basic operation principle of recording, reproducing, erasing, etc. of the digital recording / reproducing apparatus according to the present invention shown in FIG. 1 will be described later in relation to the file format of digital data recorded on a hard disk and a magneto-optical disk. First, the basic operation of the digital recording / reproducing apparatus will be described with reference to the block diagram of FIG. 1 and the timing diagrams of FIGS.

[Normal Recording Function] FIG. 2 is a timing chart for explaining the recording operation of one channel of the digital recording / reproducing apparatus shown in FIG. During normal (timer) recording, for example, the user operates the user interface 122 to set the channel of the television program to be recorded, the recording start time, and the recording end time. For example, if channel 1 is set to record from 8:00 pm to 10:00 pm, the system controller 120 designates the tuner 103 as channel 1 at 8:00 pm based on information from the real-time clock module 127, The tuner 103 selects and demodulates the signal radio wave of channel 1 from the signal radio wave received by the antenna 100.

The demodulated signal is supplied to the A / D converter 106, the MPEG2 video encoder 108,
Audio encoder 110 and multiplexer /
The data is converted into an MPEG2 system stream via the demultiplexer 111. System controller 120
Selects the first data bus including the buffer memory 116, and accordingly, the MPEG2 system stream is provided to the HD / MO controller module 118 via the buffer memory 116. The HD / MO controller module 118 writes data to the HDD 119 using an interface command with the HDD 119.

In FIG. 2, (a) shows a time axis,
(B) shows the processing time of writing from the multiplexer / demultiplexer 111 to the buffer memory 116, and (c) shows the processing time.
Indicates the processing time for writing from the buffer memory 116 to the HDD 119 via the HD / MO controller module 118. Multiplexer / Demultiplexer 1
The MPEG2 system stream formed in step 11 is stored in a buffer memory 116 provided on the first data bus.
Sent constantly at the bit rate of the system stream.

The amount of data in the buffer memory 116 is H
When the D / MO controller module 118 monitors the data amount and the data amount exceeds a certain threshold value, a process of writing the data amount corresponding to the threshold value to the HDD 119 is performed. Since the writing speed to the HDD 119 is higher than the bit rate of the system stream, the HD / MO
The processing time for writing to the HDD 119 by the controller module 118 is short. That is, the amount of data transferred from the multiplexer / demultiplexer 111 to the buffer memory 116 at the time indicated by the bold line in FIG.
From the buffer memory 116 at the time indicated by the bold line
119 is the same as the amount of data transmitted.

As described above, the recording of the channel 1 is performed from 8:00 pm to 10:00 pm, and the recording ends at 10:00 pm. [Normal Playback Function] FIG. 3 is a timing chart for explaining the playback operation of one channel of the digital recording / playback apparatus shown in FIG.

At the time of normal reproduction, for example, the user operates the user interface 122 to instruct reproduction of a desired title. The system controller 120 responds accordingly.
For the HD / MO controller module 118, H
An instruction to read data of a desired title from the DD 119 is issued. At this time, the system controller 120 selects the first data bus including the buffer memory 116, and according to this, the data read from the HDD 119 is
The data is transferred to the multiplexer / demultiplexer 111 via the / MO controller module 118 and the buffer memory 116.

In FIG. 3, (a) shows a time axis,
(B) shows the processing time for reading data from the HDD 119 via the HD / MO controller module 118 and writing it to the buffer memory 116, and (c) shows the processing time for the multiplexer / demultiplexer 11 from the buffer memory 116.
The write processing time to 1 is shown. When playback start is instructed by the system controller 120, the HD / MO
The controller module 118 performs a process of reading data from the HDD 119 and writing the data to the buffer memory 116. At this time, the HD / MO controller module 118
Monitors the amount of data in the buffer memory 116 and, when the amount of data falls below a certain threshold,
The data is read from the DD 119 and written into the buffer memory 116.

Writing of data from the buffer memory 116 to the multiplexer / demultiplexer 111 is performed constantly at the bit rate of the system stream. Since the reading speed from the HDD 119 is higher than the bit rate of the MPEG2 system stream,
The write processing time to the buffer memory 116 by the / MO controller module 118 is short.

That is, the amount of data transferred from the HDD 119 to the buffer memory 116 at the time indicated by the thick line in FIG. 3B, and the multiplexer / demultiplexer 111 from the buffer memory 116 at the time indicated by the thick line in FIG. Is the same as the amount of data transferred to Multiplexer /
The video signal and the audio signal demultiplexed by the demultiplexer 111 are sent to an MPEG2 video decoder 112 and an audio decoder 113, respectively.

The video signal decoded by the MPEG2 video decoder 112 and the audio signal decoded by the audio decoder 113 are D / A
The signal is converted into an analog television signal by the converter 114 and is reproduced and displayed on an external television monitor 126 via the graphic controller 124.

[Two-Channel Simultaneous Recording Function] FIG. 4 is a timing chart for explaining the simultaneous recording operation of two channels of the digital recording / reproducing apparatus shown in FIG. At the time of simultaneous recording on two channels, the user operates the user interface 122 to set the channel of the television program to be recorded, the recording start time, and the recording end time. For example, if channel 1 is set to record from 8:00 pm to 10:00 pm and channel 3 is set to record from 9:00 pm to 11:00 pm, the system controller 120 uses the information from the real-time clock module 127 to record. At 8:00 pm, tuner 103 was switched to channel 1
, And the tuner 103 selects and demodulates the signal radio wave of channel 1 from the signal radio wave received by the antenna 100.

The demodulated signal is supplied to the A / D converter 106, the MPEG2 video encoder 108,
Audio encoder 110 and multiplexer /
The data is converted into an MPEG2 system stream via the demultiplexer 111. At this point, the first data bus including buffer memory 116 and buffer memory 1
17 are not used together, the system controller 120 selects the first data bus including the buffer memory 116, and the MPEG2 system stream is multiplexed accordingly.
The data is transferred from the demultiplexer 111 to the HD / MO controller module 118 via the buffer memory 116. The HD / MO controller module 118
Data is written to the HDD 119 by using an interface command with the DD 119.

The system controller 120, based on information from the real-time clock module 127,
At 9:00 pm, the tuner 102 is designated as the channel 3, and the tuner 102 selects and demodulates the signal radio wave of the channel 3 from the signal radio wave received by the antenna 100.
The demodulated signal is supplied to the selector 104, A
/ D converter 105, MPEG2 video encoder 1
07, an audio encoder 109, and a multiplexer / demultiplexer 111 to convert to an MPEG2 system stream.

Multiplexer / Demultiplexer 111
Between the HD / MO controller module 118 and
Of the data buses of the system, the first data bus including the buffer memory 116 is already used for recording channel 1 from 8:00 pm, so the system controller 12
0 selects the second data bus including the buffer memory 117, and accordingly, the MPEG2 system stream is provided from the multiplexer / demultiplexer 111 to the HD / MO controller module 118 via the buffer memory 117. The HD / MO controller module 118 writes data to the HDD 119 using an interface command with the HDD 119.

At this time, the HD / MO controller module 118 writes the two MPEG2 system streams into the HDD 119 alternately in units of a fixed length. That is, the system stream data of channel 1 is read out from the buffer
9, while the system stream data of channel 3 is accumulated in the buffer memory 117, while the system stream data of channel 3 is read from the buffer memory 117 and written to the HDD 119, the buffer memory 116 The system stream data of channel 1 is stored in the.

As described above, from 9:00 pm to 10:00 pm, a state in which two channels of channel 1 and channel 3 are simultaneously recorded continues. In FIG.
(A) shows the time axis, (b) shows the write processing time from the multiplexer / demultiplexer 111 to the buffer memory 116, and (c) shows the write processing time from the multiplexer / demultiplexer 111 to the buffer memory 117. (D) shows the processing time.
HD via D / MO controller module 118
D shows the processing time for writing to the HD / MO controller module 1 from the buffer memory 117.
18 shows a processing time for writing to the HDD 119 via the.

Referring to FIG. 4, when the start of the first recording on channel 1 is instructed, the recording processing described with reference to FIG. 2 is performed. Then channel 3
Is instructed to start the second recording for
For 9, both the writing process from the buffer memory 116 and the writing process from the buffer memory 117 are performed. The arbitration of these two writing processes is HD
This is performed by the / MO controller module 118.

As specifically shown in FIG. 4, when the amount of data in the buffer memory 117 exceeds a certain threshold after the start of the second recording, the HDD 119 is in a usable state. Write processing is performed. While this process is being performed, the buffer memory 1
16 exceeds the threshold value, and writing to the HDD 119 is requested, but since the HDD 119 is in use, the HDD 1
The process waits until the writing process of No. 19 is completed. When the writing from the buffer memory 117 to the HDD 119 is completed, the writing process from the buffer memory 116 is started.

Conversely, when the amount of data in the buffer memory 117 exceeds the threshold after the start of the second recording, the HDD 119
Is being used, the writing process from the buffer memory 117 to the HDD 119 is performed after waiting until the device becomes available. After the simultaneous recording of the two channels proceeds, the recording of channel 1 ends at 10:00 pm and the recording of channel 3 ends at 11:00 pm.

As described above, since the data transfer is performed at a high speed between the HD / MO controller module 118 and the HDD 119, the two buffer memories 116 and 1
17 can realize real-time recording of two streams of MPEG2 system stream data. The capacity of each buffer memory is the unit block length of writing / reading, HD
It can be calculated from the data transfer rate between the / MO controller module 118 and the HDD 119, the rate of the MPEG2 system stream, and the worst value of the seek time of the HDD 119. This calculation will be described later in detail.

The memory 121 stores a file system for managing a free area of the HDD 119 and managing files. Therefore, the logical address at which the system stream is to be written / read next is determined by the file system via the system controller 120 as the HD / MO.
It is specified to the controller module 118. As a result,
Even when recording two channels simultaneously, the file system manages the next logical address to be recorded.
The HD / MO controller module 118 may write / read data to / from a logical address specified by the system controller 120. The management by the file system will be described later in detail.

In the above-described example, simultaneous recording of two channels of television broadcasting is shown.
When a VTR, a camcorder, or the like is connected to 1, selection of an external input is designated from the system controller 120 to the selector 104. As a result, the television broadcast HD
While recording to D119 via tuner 103,
Dubbing from an external television signal source to the HDD 119 via the external input terminal 101 can be performed simultaneously.

[Chase Playback Function] FIG. 5 is a timing chart for explaining a so-called chase playback function of the digital recording / playback apparatus shown in FIG. The so-called “chasing playback” refers to a function of simultaneously playing back a recorded program while recording a television broadcast.

For example, the user sets channel 1 to 8 pm
If you set to record from 10:00 to 10:00 pm,
At 8:00 pm, the system controller 120 designates the tuner 103 as the channel 1 at 8:00 pm based on the information from the real-time clock module 127, and the tuner 103 selects and demodulates the signal wave of the channel 1 from the signal wave received by the antenna 100. I do.

As described above, the demodulated signal is A / D
Converter 106, MPEG2 video encoder 10
8, the audio stream is converted into an MPEG2 system stream via the audio encoder 110 and the multiplexer / demultiplexer 111. At this point, since both data buses are not used, the system controller 120 selects the first data bus including the buffer memory 116, and accordingly, the MPEG2 system stream is switched to the multiplexer / demultiplexer. 1
11 to the HD / MO controller module 118 via the buffer memory 116. The HD / MO controller module 118 transmits data to the HDD 119 using an interface command with the HDD 119.
Write to.

When the user returns home at 9 pm and wishes to view the title of channel 1 being recorded from the beginning, the user operates the user interface 122 to instruct reproduction of the title being recorded. In response, the system controller 120
Instructs the HD / MO controller module 118 to read the title being recorded from the HDD 119.

At this time, the multiplexer / demultiplexer 111 and the HD / MO controller module 118
Since the first data bus via the buffer memory 116 has already been used, the buffer memory 117
The use of the second data bus via is instructed by the system controller 120. Data read from the HDD 119 is transferred to the multiplexer / demultiplexer 111 via the HD / MO controller module 118 and the buffer memory 117.

Multiplexer / Demultiplexer 111
Demultiplexes the MPEG2 system stream received from the buffer memory 117 into a video signal stream and an audio signal stream, and
2 to the video decoder 112 and the latter to the audio decoder 113. The MPEG2 video decoder 112
Decodes a given video signal stream to D / A
The signal is supplied to a converter 114, and the audio decoder 113
Decodes the given stream of audio signals and
/ A converter 114. D / A converter 11
4 converts the applied signals into analog signals, and supplies an analog television signal including a video signal and an audio signal to one input of the graphic controller 124.

The graphic controller 124 supplies the supplied analog television signal to a television monitor 126 connected outside the digital recording / reproducing apparatus, and reproduces and displays the television signal. By operating the user interface 122, a television signal output to the external television monitor 126 is transmitted to the tuner 10.
It is also possible to switch and output the television signal from the TV signal 3 or the television signal selected by the selector 104 between the tuner 102 and the external input terminal 101. Furthermore, two or three signals can be arbitrarily selected from these three television signals, and clipped by the graphic controller 124 so that they can be displayed at once.

In the case of this chasing playback, the HD / MO controller module 118 alternately converts the two MPEG2 system streams into units of a fixed length.
Writing / reading is performed on D119. That is,
While the system stream data of channel 1 is read from the HDD 119 and written to the buffer memory 117, the system stream of channel 1 generated by the multiplexer / demultiplexer 111 is accumulated in the buffer memory 116.

On the other hand, the system stream data of channel 1 is read out from the buffer
9, while the system stream data of channel 1 stored in the buffer memory 117 is stored in the buffer
2 video decoder 112 and audio decoder 113.

With reference to the timing chart of FIG. 5, the chase reproduction operation using these two channels will be described in more detail. In FIG. 5, (a) shows a time axis,
(B) shows the write processing time from the multiplexer / demultiplexer 111 to the buffer memory 116,
(C) shows the processing time for writing from the buffer memory 116 to the HDD 119 via the HD / MO controller module 118, and (d) shows the processing time from the HDD 119 to the HD / MO.
A processing time for reading data via the MO controller module 118 and writing the data to the buffer memory 117;
(E) shows a case where the multiplexer /
The write processing time to the demultiplexer 111 is shown.

When the start of recording is instructed, the recording process described with reference to FIG. 2 is performed. Thereafter, when a reproduction start is instructed, the reproduction processing described with reference to FIG. 3 is performed. At this time, both the writing process from the buffer memory 116 and the reading process for transferring the data to the buffer memory 117 are performed on the HDD 119. The arbitration of these two processes is performed by the HD / MO controller module 118.

Specifically, in FIG. 5, when the reproduction is started, the HDD 1
Since 19 is in a usable state, a process of reading data from the HDD 119 and writing it to the buffer memory 117 is performed. It is conceivable that while this process is being performed, the data amount of the buffer memory 116 exceeds the threshold and writing to the HDD 119 is required. However, in this case, since the HDD 119 is in use, writing is waited until the processing is completed.

When the reading of the data from the HDD 119 is completed, the writing process from the buffer memory 116 is started. Conversely, if the HDD 119 is in use at the start of the reproduction, the data is read from the HDD 119 and written to the buffer memory 117 after waiting until the HDD 119 becomes usable. As described above, from 9:00 pm to 10:00 pm, recording of channel 1 and reproduction of the title of channel 1 being recorded are simultaneously performed. At 10:00 pm, recording of channel 1 ends, and playback of the title recorded at 11:00 pm ends.

In this chasing playback, HD / MO
Since data transfer is performed at high speed between the controller module 118 and the HDD 119, only two buffer memories 116 and 117 need to be provided to provide two systems of MPEG.
2, real-time recording / reproduction of the system stream can be realized. The capacity of each buffer memory and the unit block length of writing / reading necessary for each buffer memory not to be empty during reproduction are determined by the data transfer rate between the HD / MO controller module 118 and the HDD 119 and the HDD 119 It can be calculated from the worst value of the seek time.

[Other Recording / Reproducing Functions] In the above example,
I explained the chase playback of the title being recorded,
During the recording of a certain title, another previously recorded title may be reproduced, or during the reproduction of a certain title, timer recording of a certain channel may be started. The buffer memory 117 stores the digital output 12
9 is connected to the HDD 119 so that the HD / M
M read via the O controller module 118
The PEG2 system stream is transferred to the buffer memory 11
7, and can be output to the digital output 129. Alternatively, a television signal obtained by selecting either an input television signal from the tuner 103 or an output of the tuner 102 and an input through the external input terminal 101 by the selector 104 is digitally compressed, and then subjected to multiplexer / demultiplexing. An MPEG2 system stream formed by multiplexing by the multiplexer 111 can be output to the digital output 129 via the buffer memory 117.

Similarly, the buffer memory 116 is also connected to the digital input 128, and records the system stream input from the digital input 128 to the HDD 119 via the buffer memory 116 and further via the HD / MO controller module 118. On the other hand, the data is demultiplexed by the multiplexer / demultiplexer 111 via the buffer memory 116, and the video signal and audio signal streams are decoded by the MPEG2 video decoder 112 and the audio decoder 113, respectively. It can be reproduced and displayed on the television monitor 126. Regarding the two input / output buses passing through these buffer memories 116 and 117, the user interface 12
2 can be arbitrarily specified.

[System Configuration with Multiple Players] FIG.
Two players configured as the digital recording / reproducing apparatus shown in the block diagram of FIG. 1 are arranged, and the digital output 129 of one player is connected to the digital input 128 of the other player. And 1
Two system streams are simultaneously read from the HDDs 119 of one player, and one system stream is read from the buffer memory 116.
Is transferred to the multiplexer / demultiplexer 111 via the buffer memory 117, and the other system is output to the digital output 129 via the buffer memory 117.

Multiplexer / Demultiplexer 111
Are demultiplexed into a video signal stream and an audio signal stream, transferred to the MPEG2 video decoder 112 and the audio decoder 113, respectively, decoded, and output to the external television monitor 126. Playback is displayed.

On the other hand, the MPEG2 system stream output from the digital output 129 reaches the digital input 128 of another player by cable or wirelessly. The MPEG2 system stream input to another player from here can be recorded on the HDD 119 via the buffer memory 116 and further via the HD / MO controller module 118. Via the multiplexer / demultiplexer 111, the video signal and the audio signal streams are decoded by the MPEG2 video decoder 112 and the audio decoder 113, respectively, and externally connected to the other player. It can be reproduced and displayed on the television monitor 126.

When data is recorded in the HDD 119 of another player, the HDD 11 of one player
9 means that the data has been copied to the HDD 119 of another player. Also, the reproduced data is
When the data is decoded by one player and reproduced and displayed on the external television monitor, the HDD 1 of one player
19 data has been reproduced by another player, and 1
This means that the data in the HDD 119 of one player can be shared by a plurality of players.

In the embodiment shown in FIG. 1, two data buses run between the multiplexer / demultiplexer 111 and the HD / MO controller module 118. If the rate) × N (N is an integer) does not exceed the data transfer rate between the HD / MO controller module 118 and the HDD 119, the unit block length of writing / reading,
If parameters such as the capacity of the buffer memory are tuned up, N streams can run simultaneously in real time.

However, it is necessary to consider the worst value of the seek time of the HDD 119 between unit block transfers. This will be described later in detail. When N = 3, another buffer memory is inserted between the multiplexer / demultiplexer 111 and the HD / MO controller module 118 in the configuration of the digital recording / reproducing apparatus shown in FIG. It becomes a running configuration. In this case, in addition to the above-described two-channel simultaneous recording, reproduction of an arbitrary title being recorded or recorded in the HDD 119 can be simultaneously performed.

When a player is connected to one player, when each connected player has a bus for n streams, M = an streams are provided for all a players. I will run. The number N of buses of one player to which a player is connected is N = M. In this way, when N = M, the configuration is such that M buffer memories and M buses run between the multiplexer / demultiplexer 111 and the HD / MO controller module 118 in the configuration of FIG.

Considering a configuration in which one player has (M-1) digital outputs, connecting this player to another (M-1) player enables the HDD 119 of this player to be connected. Can be shared with other (M-1) players. [Overall Configuration of Simple Player] FIG. 6 is a block diagram of a client-type simple player when the HDD 119 of the digital recording / playback apparatus (player) shown in FIG. 1 is used as a server.

Referring to FIG. 6, a signal wave of, for example, a television broadcast received by antenna 200 is given to tuner 202, and tuner 202 converts the signal wave of one channel designated by the user from the received signal wave. The radio wave is selected, demodulated into an analog television signal including a video signal and an audio signal, and applied to one input of the selector 204. The other input of the selector 204 has an external input terminal 2 to which various external television signal sources can be connected.
01 is connected.

The selector 204 selects either the output from the tuner 202 or the input from the external input terminal 201 and gives it to one input of the graphic controller 224. Meanwhile, via the digital input 228,
M input from another externally connected player (FIG. 1)
The PEG2 system stream is transferred to the multiplexer / demultiplexer 211. The multiplexer / demultiplexer 211 demultiplexes the received MPEG2 system stream into a video signal stream and an audio signal stream, and converts the former into MPEG2 video. The decoder 212 supplies the latter to the audio decoder 21.
Give to 3.

The MPEG2 video decoder 212 decodes the supplied video signal stream and supplies it to the D / A converter 214. The audio decoder 213 decodes the supplied audio signal stream and supplies it to the D / A converter 214. give. The D / A converter 214
The supplied signals are converted into analog signals, respectively, and an analog television signal including a video signal and an audio signal is supplied to another input of the graphic controller 224.

The graphic controller 224 responds to the operation of the user interface 222 by the user.
As an output television signal to the television monitor 226, a television signal from the D / A converter 214 or an output of the tuner 202 and the external input terminal 201
Can be switched to one of the television signals selected by the selector 204 and displayed, and can be displayed at once by clipping both signals. It is.

The commands such as search, selection, deletion, timer reservation, reproduction start, pause, fast forward, rewind, and stop of the title to be reproduced from the server-side HDD 119 (FIG. 1) are transmitted to the system controller 220. Are transmitted as commands to the server-side player via the digital input 228, and are received by the server-side digital output 129 (FIG. 1). The command is transferred to the server-side system controller 120 (FIG. 1), where the command is executed.

As described above, the digital input 128 and the digital output 129 of the player shown in FIG.
Regarding the digital input 228 of the simple player of
“Input” and “output” mean the direction of input and output of MPEG2 system stream data (thick line), respectively. Actually, in addition to these data, control commands such as start and stop of reproduction are also included. The transfer direction of these control commands (thin lines) is opposite to the transfer direction of stream data.

[Capacity of Buffer Memory] Next, as described above, the capacity C of the buffer memory, the unit block length L of writing / reading, and the HD / HD required for simultaneously handling a plurality of stream data in real time. The relationship between the worst case data transfer rate Bhdd between the MO controller module 118 and the HDD 119, the rate Bsys of the MPEG2 system stream, and the worst value Tw of the seek time of the HDD 119 will be described in detail.

However, the worst value Tw of the seek time is:
It is not only the time required only for head seek, but also the error correction such as seek time, rotation waiting time, head switching time, ECC / EDC, etc., which is required from the start of seek to the start of actual data writing / reading. This is a time that takes into account all the worst values of the group delay such as the time required. Assuming that the number of streams to be processed simultaneously is N, the following equation must be satisfied in order to maintain the real-time properties of all the streams.

Bhdd × Ts> N × (Tw + Ts) × Bsys (1) where Ts is a time required for writing / reading the unit block length L of writing / reading to / from the HDD 119, and Ts = L / Bhdd. In the above equation (1), when data is read (reproduced), the amount of data read in a unit block in a certain stream is equal to N seek times and N times required to process N streams. This means that it is necessary to design so as not to be consumed within the sum of the data write / read time.

Further, in the case of writing (recording) data,
In the worst case, the amount of data stored in the buffer memory during the time required to process N streams is N ×
(Tw + Ts) × Bsys.
Therefore, the capacity C of the buffer memory needs to satisfy the following equation. C> N × (Tw + Ts) × Bsys (2) By performing a design that satisfies the above equations (1) and (2), it becomes possible to simultaneously process N streams in real time. However, Bhdd> N ×
N must be set within a range that satisfies Bsys.

[OPF (Objective Pool Format)] Next, the hard disk (HDD 11
9) and the file format of digital data recorded on the magneto-optical disk will be described. For convenience, the file format described below is
Format (hereinafter referred to as OPF). FIG.
FIG. 3 is a diagram for schematically explaining the configuration of an OPF file.

As shown in FIG. 7, the file format of the OPF is a real-time extent 301, a container information file 302, a title set file 3
03 and a title file 304. The role of each of the above files will be described below with reference to FIG. (1) Container A container is a basic unit of data operation in OPF. In the system of the present invention, each container is an MP
The data structure of the EG is closed, and data reproduction by the container alone is guaranteed. The size of the container in the system of the present invention is as follows: (sector size of HDD 119) × 5376 = 512 bytes × 5376 = 2752512 bytes A container having this capacity stores video data and audio data for a certain period of time. . Note that in the system of the present invention, video data (Group
of Pictures (hereinafter, GOP) and audio data corresponding thereto are multiplexed by the multiplexer / demultiplexer 111 to form a system stream.

Since the number of pictures in one GOP is set to 15, the reproduction time of one container is as follows. 5 × (15/30) = 2.5 seconds Here, it is verified whether or not these parameters are guaranteed to be reproduced in container units.

In the above definition, if the unit block (container) length for writing / reading is L = 27552512 bytes, the rate Bsys of the MPEG2 system stream
Is Bsys = L / 2.5 = 1110004 bytes / sec. In the system of the present invention, the number of streams is N = 2, and the worst value of the seek time is Tw =
If the worst case data transfer rate between the HD / MO controller module 118 and the HDD 119 is Bhdd = 5 MB / sec, then Ts = L / Bhdd = 550 ms. Therefore, Bhdd × Ts = 5 × 10 ⁶ × 550 × 10 ⁻³ = 2.7
6 × 10 ⁶ N × (Tw + Ts) × Bsys = 2 × (50 + 550)
× 10 ⁻³ × 1101004 = 1.32 × 10 ⁶ holds, which satisfies the expression (1). Therefore, reproduction of data in container units is guaranteed with these defined parameters.

(2) Real-time extent The real-time extent 301 is
MPEG2 created by demultiplexer 111
Is an area of the HDD 119 in which the above-described system stream is stored as the above-described container-based data. Therefore,
The total capacity of the real-time extent 301 is always an integral multiple of the capacity of a single container. Further, even in the HDD 119 that performs recording in sector units, the start address of the real-time extent 301 must be from an address corresponding to a container delimiter. This is in the container information file 302 described later.
This is because the disk space is regarded as an address space of a container unit.

(3) Container Information File The container information file 302 considers the real-time extent 301 of the recording area of the HDD 119 as an address space in units of containers and uses container numbers (R0, R1, R
2,...) Are defined in order to manage the recording information of each container. When the number of references (link count) for each container is 0, it indicates that MPEG2 data is not recorded in the container from the beginning or that the user has performed a data erasing operation. Indicates that new data recording is possible. In the example of FIG. 7, containers R8 and R15 correspond to recordable containers. If the number of references (link count) is 1, it indicates that the container is referenced by at least one of the title files (MPEG2 data is stored) and that the container is not recordable. .

(4) Title File In the title file 304, link information on the title is recorded. Specifically, as shown in FIG. 7, header information and address information of the start position of the container to be referenced in the real-time extent 301 are sequentially recorded in each title file. In FIG. 7, the title file (title 0) 304-1 stores the start addresses of the real-time extents R0 to R3 and R6, and the title file (title 1) 304-2 stores the real-time extent R
4, R5, R7, and R9 to R12 are stored in the title file (title 2).
04-3 are real-time extents R13, R14,
The start address of each of R16 is stored.

(5) Title set file The title set file 303 is the title file 3
04 is a file for managing the file. The configuration includes header information and a start address of each title file in the HDD 119. In FIG. 7, the title 0 descriptor is a title file (title 0) 304-
1 is stored, and the title 1 descriptor is a title file (title 1) 304-2.
And the title 2 descriptor stores the start address of the title file (title 2) 304-3.

[Recording / Reproducing Operation Using OPF]
The basic operation of the digital recording / reproducing apparatus according to the present invention using the above-described OPF file format will be described in detail. The above OPF files are all stored in the HDD.
119, when the digital recording / playback apparatus is started, the container information file 302, title set file 303, and title file 304 of the OPF are read out to the memory 121, and the address is controlled by the system controller 120. Used. The updated content of the file in the memory 121 is written to the file in the HDD 119 at an appropriate timing, and the OPF is updated. However, according to the present invention, as described above, even when the management information needs to be rewritten, If there are streams being recorded or played back, priority is given to the real-time performance of these streams, and after the recording or playback is stopped, the management information (the container information file 302 and the title set file 303 read into the memory 121) , Updating (information of the title file 304) (writing to the file of the HDD 119).

The normal recording / reproducing operation using the OPF will be described in detail below, and then the operation of automatically creating a library from the HDD 119 to the magneto-optical disk, which is a feature of the present invention, will be described with reference to FIGS. . (1) Recording Operation First, the operation when recording MPEG2 system stream data in the HDD 119 will be described with reference to FIGS.
This will be described with reference to the flowchart of FIG.

First, when the user instructs recording by operating the user interface 122 (step S1),
The system controller 120 secures a writable area (container) in the real-time extent 301 with reference to the container information file 302 read from the HDD 119 (step S2). That is, the container information file 302 is searched for a container whose reference number (link count) is 0. In the case of the two-channel simultaneous recording described above, the number of the corresponding container whose container information file 302 has a reference number of 0 is set to 1 so as not to be used by another recording procedure.
It is added (step S3). Then, data for one container is written to the real-time extent 301 of the HDD 119 corresponding to the searched container number (step S).
4).

When a termination instruction is received from the user via the user interface 122 (step S5), the title file 304 is generated, the title set file 303 is updated, and the recording process is terminated (step S5).
6). If there is no end instruction, steps S2 to S5
Repeat the above steps. The recording stop request from the user is instructed at an arbitrary timing after the start of the recording. The instruction request is temporarily stored in the memory 121 and is processed in step S5.

In the state shown in FIG. 7, when a recording instruction is received in step S1, the area (container) initially secured in step S2 is R8 having a reference number of 0. Then, in step S3, 1 is set in the R8 area of the container information file 302. Step S4
HDD1 at the start address of container R8
Multiplexer / demultiplexer 111 in area 19
Of the MPEG2 system stream data for one container.

Then, in step S2, the next area R15 having the reference number 0 is secured, and the recording operation is repeated in the same manner. When an instruction to end recording is received in step S5, step S5 is performed.
In step 6, a title file (title 3) is generated.
Stores link information consisting of discretely recorded container numbers. Then, the title set file is updated, and the recording ends.

(2) Reproduction Operation Next, the operation for reproducing the MPEG2 system stream data recorded on the HDD 119 will be described with reference to FIG.
This will be described with reference to the flowchart of FIG. When the user operates the user interface 122 to specify a title to be reproduced (step S11), the system controller 120 initializes a container pointer for reproduction (step S12). The container pointer is
This is a pointer indicating which container is currently pointed in the corresponding title file.

Then, the corresponding title file 304 is selected from the title set file 303, the link information to the container referred to therein is scanned by the value of the container pointer, and the container to be reproduced is searched (step S13). . H corresponding to the searched container number
The data for one container is read from the real-time extent 301 in the disk area of the DD 119 and reproduced (step S14).

Here, when an end instruction is received from the user via the user interface 122 (step S1).
5) The end processing is performed, and the reproduction operation ends (step S18). The reproduction stop request from the user is instructed at an arbitrary timing after the reproduction is started, but the instruction request is temporarily stored in the memory 121 and is processed in step S15.

If there is no end instruction, one is added to the container pointer to refer to the container to be reproduced next (step S16). Here, it is checked whether or not the container pointer has reached the end of the corresponding title file 304 (step S17). When the end of the title file is reached, the end processing (step S
Go to 18) and end the process. When the container pointer has not reached the end of the title file 304, steps S13 to S17 are repeated.

A specific example will be described with reference to FIG. When an instruction to reproduce the title number 1 is received in step S11, the start address of the title file (title 1) is searched in step S13, and the container number R4 to be referred to is obtained. In step S14, H
1 from the address corresponding to the container number R4 of DD119
The data for the container is transferred to the multiplexer / demultiplexer 111, and the data is reproduced. Step S
If no reproduction stop command is received in step 15, one is added to the container pointer in step S16.

Returning to step S13, the container number R5 indicated by the container pointer is obtained. Reproduction is performed by repeating the same procedure. Reproduction proceeds and container number R1
When 2 has been reproduced, when 1 is added to the container pointer in step S16, it is determined that the end of the title file has been reached in step S17, so the end processing of step S18 is performed, and the reproduction operation ends.

(3) Erasing Operation Next, the operation for erasing the MPEG2 system stream data recorded in the HDD 119 in units of title files 304 will be described with reference to the flowcharts of FIGS. When the user operates the user interface 122 to specify a title file to be deleted (step S21), the system controller 12
A value of 0 retrieves the title file 304 to be deleted from the title set file 303 stored in the HDD 119, and decrements the link count of the container information file 302 corresponding to the container number indicated by the title file 304 by one (step S22). ). As a result, the container having the link count of 0 becomes a free area because it is not referenced in any title file. Next, the designated title file is deleted (step S23), and the title set file is updated (step S24).

For example, assume that an instruction to delete the title file (title 0) has been received from the state shown in FIG. 7 (step S21). In response, in step S22, the link count of the portions R0 to R3 and R6 in the container information file 302 is decreased by 1 to 0. Then, in steps S23 and S24, the title file (title 0) is deleted, and the title 0 descriptor is deleted from the title set file. Thus, the erasing operation ends.

[Ease of Title Management] Hereinafter, video signals, audio signals, and signals including video and audio are collectively referred to as video / audio signals. This video / audio signal is HD
This is recorded as a title in D119. FIG. 11 is a configuration diagram of management information added as a title file 304 compliant with OPF when a title is generated.

Referring to FIG. 11, title file 30
4 includes a header area 701 and a pointer area 702. The header area 701 includes a title ID 703 which is information necessary for the system to identify a title, and title detailed information 704 used for displaying a title list or the like.
And title attachment information 705 that is attachment information for the title.

The detailed title information 704 is information that can be rewritten by the user as needed. The title attachment information 705 includes a title creation time 712, a last access time 713, a recording time 714, channel information 715, day of the week information 716, information on the number of pointers, and other information. However, since the day of the week information 716 can be calculated from the title generation time, it does not have to be added. These title attached information is set so that the user cannot manually rewrite the information.

The pointer area 702 includes a pointer 706,
707... The pointers 706 and 707 are pointers indicating the real-time extent areas to be recorded and reproduced out of the real-time extents 708 to 711 that record the container which is the content of the video / audio signal of the title. FIG. 12 is a diagram illustrating a state in which a list of titles is displayed.

Referring to FIGS. 11 and 12, the total number of recorded titles “4” is displayed from the top of the screen, and the contents of title detailed information 704 corresponding to the four titles are displayed in order. On the right side, the status of each title is displayed. The title detailed information 704 automatically holds a character string that can be identified based on the date, time, day of the week information, and channel information 715 obtained from the title generation time 712 included in the title attached information 705 as the title detailed information 704. This is displayed on the screen.

For example, the title No. 1 is September 2, 1999
It can be seen that the program is recorded on channel 6 from 20:00 on Sunday 0, and that it is currently being reproduced.
Also, it can be seen that the title No. 3 is a program of channel 10 recorded from 13:57 on Monday, October 4, 1999, and that the state is currently being recorded.

As described above, when the list of titles is displayed, it is easy for the user to understand when and which channel is the recorded title. However, the field of the title detailed information 704 is also an area where the user can manually rewrite.
Therefore, it is also possible for the user to input an arbitrary character string by himself and to add a title name which is most easily identifiable to the user. Further, even after the user overwrites the title name, the date, time, day of the week information, and channel information are stored in the title attached information 705, so that the area of the title detailed information 704 can be restored to an automatically generated state. It is possible.

FIG. 13 is a flowchart of the automatic addition of the detailed title information 704 when manual recording is performed in response to a request from the user. With reference to FIGS. 1 and 13, in step S71, a recording start command is input via the user interface 122. In step S72, the current time information is read from the real-time clock module 127 to the system controller 120, and the system controller 120 stores the current time information in the memory 121.

In step S73, a recording process is performed. This recording process is performed according to the flowchart shown in FIG. In step S74,
To allow the user to manually determine whether to add a title name to the detailed title information 704, the system controller 120
4 is instructed to output a display to that effect to the television monitor 126. If the user has manually selected to add a title name, the process proceeds to step S77. On the other hand, if the title name is to be added automatically, step S7
Go to 5.

However, steps S74 and S
The processing of 75 may be performed while the recording processing is being executed in the background after the recording processing of step S73 is started. In step S75, each parameter obtained in step S72 is converted into a title name which is character string information as shown in FIG. Step S7
6, the created title file 304 is stored in the HDD 1
19, the process of automatically adding the title name during manual recording ends.

On the other hand, in step S77, characters that can be input are displayed on the television monitor 126, and the characters input from the user interface 122 are stored in the memory as detailed title information 704. FIG. 14 is a flowchart of the automatic addition of the detailed title information 704 when performing the scheduled recording.

Referring to FIG. 1 and FIG. 14, step S81
Then, an instruction for setting the scheduled recording is input via the user interface 122. In step S82, information such as the date and time relating to the setting of the scheduled recording is input via the user interface 122. Next, in step S83, a reserved recording area is secured. In the process of step S83, the processes shown in steps S2 and S3 in the recording flow shown in FIG. 8 are performed.

In step S84, the system controller 1 prompts the user to determine whether to manually add a title to the detailed title information 704.
20 instructs the graphic controller 124. Then, the user makes a selection between manually adding a title name and automatically adding a title name. If the user selects to manually add a title name, step S
The process advances to step S85, if it is determined that automatic addition of a title name has been selected.

In step S85, the values of the date, time information, and channel information obtained in step S82 are converted into character string information for displaying the title shown in FIG. Thus, for example, “1999/09/20 (Sun) 20:
A character string such as "00Ch6" is given as the title name. In step S86, the created title file 3
04 is recorded in the HDD 119, and the process ends.

On the other hand, in step S87, characters that can be input are displayed on television monitor 126, and the input characters input via user interface 122 are stored as title detailed information 704. FIG.
It is a flowchart at the time of changing a title name, ie, title detailed information 704.

Referring to FIGS. 1 and 15, step S91 will be described.
Then, a command to change the title name is input from outside via the user interface 122. Accordingly, in step S92, title file 304 stored in HDD 119 is read and read by system controller 120. In step S93, a display is displayed on the television monitor 126 to ask the user whether to input a title name. If the user has manually selected to add a title, the process proceeds to step S96. If the user has automatically selected to add a title, the process proceeds to step S94.

In step S94, the title creation time 712, last access time 713, and recording time 71 shown in FIG. 11 in the title attached information 705 in the title file 304 read in step S92.
4. The necessary parts of the channel information 715 and the day information 716 are converted into title names. Then, the title name is stored as title detailed information 704.

In step S95, the changed title file 304 is recorded in HDD 119, and the title name change process ends. On the other hand, in step S96, characters that can be input are displayed on the television monitor 126. Then, the user selects a character from the characters that can be input and inputs the input character via the user interface 122, and this is stored as the detailed title information 704.

FIG. 16 is a flowchart for displaying a list of title names, that is, detailed title information 704. Referring to FIGS. 1 and 16, in step S101,
A title list display command is input via the user interface 122. Accordingly, in step S102, the title set file 303 stored in the HDD 119 is read by the system controller 120,
The system controller 120 stores the title set file 303 on the memory 121.

At step S103, the read title set file 303 is stored in the system controller 120.
Analyzes. Accordingly, it is determined whether or not the title recorded on the HDD 119 exists. If the title exists, the process proceeds to step S104. If the title does not exist on the hard disk, the process proceeds to step S10.
Proceed to 8.

In step S104, the title file 304 is read from the HDD 119 in accordance with the address pointed to by the title descriptor included in the title set file 303 in the memory 121, and the title file 304 is stored in the memory 121. In step S105, the title detailed information 704 included in the title file 304 obtained in step S104, that is, the title name is added to the list of title list display.

In step S106, it is determined whether or not the search has been completed for all the title files 304 existing in the title set file 303. If the search is completed, step S10
Proceeding to step S7, if the search has not been completed yet, the process returns to step S104 to continue the search. Step S107
Then, the system controller 120 instructs the graphic controller 124 to draw a list of title names based on the title list for list display generated in step S105. Then, a list of title names is displayed on the television monitor 126.

In step S108, the system controller 120 instructs the graphic controller 124 to draw that the recorded title does not exist, and the character string or graphic notifying that the recorded title does not exist is displayed on the television. It is displayed on the John Monitor 126. The above is the ordinary recording / reproducing operation using the OPF. In the above description, only the recording / reproducing operation in the HDD 119 has been described.
The same operation is performed when recording / reproducing is performed using a magneto-optical disk (not shown) mounted on the device.

Subsequently, the HDD 119 which is a feature of the present invention is used.
The operation of automatically creating a library from a disk to a magneto-optical disk will be described. In the digital recording / reproducing device of the present invention,
The title recorded on the HDD 119 is copied to the magneto-optical disk without any trouble of the user ([COP
Y]) or move ([MOVE]) (delete title from HDD 119 after copying to magneto-optical disk), and confirm whether to copy or move ([confirmation]) (hereinafter, library automatic creation) ) Can be performed.

First, FIG. 17 shows a format of information for automatically creating a library. This information is recorded on each magneto-optical disk, and the title name 90
0, genre 901, title HD as library
D119, processing information 902 indicating whether to copy or move, and timestamp information 903 of the most recently recorded title among library titles.
It is composed of

Next, FIG. 18 shows an input example of the library automatic creation information shown in FIG. In the example of FIG. 9A, the title is [News Station] and the genre is [News], indicating that the title is copied from the HDD 119 to the magneto-optical disk. Also,
In the example of FIG. 13B, the title is blank, the genre is news, and the title is moved from the HDD 119 to the magneto-optical disk (after the title is copied from the HDD 119 to the magneto-optical disk, the title on the HDD 119 is changed to (Delete). That is, in the case of FIG. 18A, this magneto-optical disk is a [news station].
Is a library that collects the titles
In the case of (b), this magneto-optical disk is a library in which the genre [News] is collected.

In this example, the processing information 902 ([CO
[PY], [MOVE], and [Confirmation]) are circled for the corresponding processing for easy understanding, but the information to be recorded on the magneto-optical disk is a flag area corresponding to the above three processings. And a method of setting a flag at a desired process, or directly writing a character string corresponding to the process in a predetermined area.

Next, the process of writing the library automatic creation information in the magneto-optical disk will be described with reference to the flowchart of FIG. First, when a magneto-optical disk storing no library automatic creation information is loaded into the MO drive 130 (1000: NO), the system controller 120 displays a list of titles in the HDD 119 (1001). Then, from the list of titles, the user selects a title to be stored on the magneto-optical disk as a library (1002). At this time, first, the system controller 120 inquires of the user whether to register the name and genre of the selected title as information for automatically creating a library (100).
3). If you want to register (1003: YE
S), write the title name and genre on the magneto-optical disk (1004), and finally copy the title ([COPY]) or move it ([MOVE]),
The user is asked to confirm ([Confirm]) (10
07), the process ends.

In (1003), if the user selects not to register both the title name and the genre name (1003: NO), the system controller 120 determines whether to register only the genre name. Is confirmed with the user (1005). If you want to register, write the genre on the magneto-optical disk (10
04) Finally, do you copy the title ([COP
Y]), move ([MOVE]) or let the user confirm ([Confirm]) (1007), and terminate the process.

Further, by using the library automatic creation information recorded on the magneto-optical disk as described above, the HD
Processing for automatically copying a title from D119 to a magneto-optical disk will be described with reference to the flowchart in FIG. First, when a user mounts a magneto-optical disk for a library in the MO drive 130 (1100), the system controller 120 checks whether or not information for automatic library creation is stored in the mounted magneto-optical disk (1101). ), If stored (11
01: YES), the information is read into the memory 121.

Next, the system controller 120
A search is performed to determine whether or not a title that matches the read library automatic creation information exists in the DD 119 (110).
2). At this time, if the column of the title name 900 of the library automatic creation information is described, a search is made for the one that matches the title name. If there is no description in the title name column,
If the title is described in the genre name column, a title having the same genre name is searched. At this time, a search is performed from the titles in the HDD 119 recorded after the latest time stamp information 903 of the library automatic creation information. I do. As a result, the title already recorded on the magneto-optical disk can be excluded from the candidates, and the search time can be reduced. Information such as the title name, genre name, and time stamp information is stored in EPG (Electric
It is more convenient to record information on a magneto-optical disk using information received by a program guide (electronic program guide) or the like.

If the corresponding title is found as a result of the above search (1102) (1103: YES),
The system controller 120 compares the remaining recording time of the magneto-optical disk for the library with the recording time of the title (1105), and if recording is possible (1105: YE).
S), the system controller 120 instructs the HD / MO controller module 118 to copy the title to the magneto-optical disk (1106).

After the copying of the title is completed, if the processing information 902 of the information for automatically creating a library is set to [move], the system controller 120 automatically deletes the title in the HDD 119. If [Confirm] is displayed, an inquiry as to whether to delete the title in the HDD 119 is displayed on the television monitor 126, and an instruction from the user is requested. If [Copy] is displayed, do nothing. At this time, the time stamp information 903 of the library automatic creation information in the magneto-optical disk is also updated (1109).

On the other hand, in (1105), if the remaining recording time of the magneto-optical disk for the library is not enough (1105: NO), the system controller 120
Displays on the television monitor 126 an inquiry as to whether or not to replace the disk with a new magneto-optical disk and continue library creation, and asks for an instruction from the user (1107). Here, when the user replaces the new magneto-optical disk, the system controller 120 first copies the information for automatically creating a library of the previously mounted magneto-optical disk to the new magneto-optical disk, and then copies the information from the HDD 119 to the optical disk. The title is copied to the magnetic disk (110
6).

This series of processing is repeated until there are no more title candidates in the search result of (1101).

[0140]

As described above, according to the present invention, digital data including a video / audio signal and management information corresponding to the video / audio signal can be written to and read from a first recording medium. Means for writing and reading data; writing and reading of digital data including a video / audio signal and management information corresponding to the video / audio signal; and writing of digital data to a removable second recording medium. In a digital recording / reproducing apparatus having means for performing writing and reading, predetermined information recorded on the second recording medium and management information of the first recording medium are searched based on the predetermined information. Means for reading digital data from the first recording medium and writing the digital data to the second recording medium based on the search result. The first from the recording medium the second recording medium without troubling the enable copies of digital data.

Further, according to the present invention, digital data can be written and read to and from a first recording medium on which digital data including a video / audio signal and management information corresponding to the video / audio signal can be written and read. Means to do,
Means for writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal, and for writing and reading digital data to and from a detachable second recording medium In the recording / reproducing apparatus, predetermined information recorded on the second recording medium, based on the predetermined information, means for searching for management information of the first recording medium, based on the search result, The digital data is read from the first recording medium and written to the second recording medium, and the digital data of the first recording medium written to the second recording medium is deleted. The digital data can be copied from the first recording medium to the second recording medium without bothering the user, and the digital data is automatically deleted from the first recording medium. It can be.

[Brief description of the drawings]

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

FIG. 2 is a timing chart for explaining a one-channel recording operation of the digital recording / reproducing apparatus shown in FIG. 1;

FIG. 3 is a timing chart for explaining a one-channel reproducing operation of the digital recording / reproducing apparatus shown in FIG. 1;

FIG. 4 is a timing chart for explaining a two-channel simultaneous recording operation of the digital recording / reproducing apparatus shown in FIG. 1;

FIG. 5 is a timing chart illustrating a chasing reproduction operation of the digital recording / reproducing apparatus shown in FIG. 1;

FIG. 6 is a block diagram showing an overall configuration of a simplified player according to an embodiment of the present invention.

FIG. 7 is a diagram schematically illustrating a configuration of a file format used in the present invention.

FIG. 8 is a flowchart illustrating a normal recording operation according to the present invention.

FIG. 9 is a flowchart illustrating a normal reproduction operation according to the present invention.

FIG. 10 is a flowchart illustrating an erase operation according to the present invention.

FIG. 11 is a configuration diagram of management information added as a title file 304 conforming to OPF when a title is generated.

FIG. 12 is a diagram illustrating a state in which a list of titles is displayed.

FIG. 13 is a flowchart of automatic addition of title detailed information 704 when manual recording is performed in response to a request from a user.

FIG. 14 is title detailed information 70 when performing scheduled recording.
4 is a flowchart of automatic addition of No. 4.

FIG. 15 shows a title name, that is, detailed title information 70;
4 is a flowchart when changing step No. 4.

FIG. 16 shows a title name, that is, detailed title information 70;
4 is a flowchart when a list is displayed.

FIG. 17 is a diagram schematically showing a format of information for automatically creating a library in a magneto-optical disk.

FIG. 18 is a diagram illustrating an example of information for automatically creating a library.

FIG. 19 is a flowchart illustrating processing when creating library automatic creation information.

FIG. 20 is a flowchart illustrating processing such as copying based on information for automatically creating a library.

[Explanation of symbols]

100, 200 Antenna 101, 201 External input terminal 102, 103, 202 Tuner 104, 204 Selector 105, 106 A / D converter 107, 108 MPEG2 video encoder 109, 110 Audio encoder 111 Multiplexer / Demultiplexer 112, 212 MPEG2 video decoder 113 , 213 Audio decoder 114, 214 D / A converter 116, 117, 131 Buffer memory 118 HD / MO controller module 119 HDD 120, 220 System controller 121, 221 Memory 122, 222 User interface 124, 224 Graphic controller 126, 226 Television Monitor 127 Real-time clock module 128, 228 Tal Input 129 digital outputs 130 MO drive 211 demultiplexer 301 real-time extent 302 container information file 303 title set file 304 title file

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C053 FA15 FA23 GA11 GB38 HA26 HA33 JA07 JA16 JA30 LA06 LA07 5D044 AB05 AB07 BC01 BC04 CC04 DE17 DE49 GK12 HL07 JJ03 5D077 AA22 AA30 DC12 DE01 DE10

Claims (5)

[Claims] A means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal; And a means for writing and reading digital data including management information corresponding to the video and audio signals, and for writing and reading digital data to and from a removable second recording medium. In the above, predetermined information recorded on the second recording medium, means for searching for management information of the first recording medium based on the predetermined information, and the first information based on the search result A digital recording / reproducing apparatus, comprising reading digital data from the recording medium and writing the digital data to the second recording medium. 2. A means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video / audio signal and management information corresponding to the video / audio signal, and a video / audio signal And a means for writing and reading digital data including management information corresponding to the video and audio signals, and for writing and reading digital data to and from a removable second recording medium. In the above, predetermined information recorded on the second recording medium, means for searching for management information of the first recording medium based on the predetermined information, and the first information based on the search result Digital data is read from the first recording medium and written to the second recording medium, and the digital data of the first recording medium written to the second recording medium is read. A digital recording / reproducing apparatus for deleting digital data. 3. A means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video / audio signal and management information corresponding to the video / audio signal, and a video / audio signal And a means for writing and reading digital data including management information corresponding to the video and audio signals, and for writing and reading digital data to and from a removable second recording medium. In the above, predetermined information recorded on the second recording medium, means for searching for management information of the first recording medium based on the predetermined information, and the first information based on the search result Digital data is read from the first recording medium and written to the second recording medium, and the digital data of the first recording medium written to the second recording medium is read. A digital recording / reproducing apparatus for inquiring whether to delete the digital data. 4. The digital recording / reproducing apparatus according to claim 1, wherein the predetermined information is a name given to digital data. 5. The digital recording / reproducing apparatus according to claim 1, wherein the predetermined information is a genre assigned to digital data.