JP2000253358A - Picture recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize the recording capacity of a tape recording medium and to avoid the interruption of recording and reproducing operation when there is a difference between a receiving rate and a recording rate by incorporating a fixed quantity of digital video information generated by a receiving part and erasure propriety information showing the propriety of erasure in segment information. SOLUTION: A memory control part 2a divides a digital video signal inputted from the receiving part 1a by each fixed time interval and gives time information and program title information to a unit digital video signal obtained by the division based on an electronic program table and program title information inputted from the part 1a. In addition, an erasure prohibiting flag showing the propriety of data erasure is given to generate a segment to output it to a large capacity memory device 3a. In addition, data of each segment is read from the device 3a and the read segment is outputted to a tape drive part 4a by the part 2a and recorded in a tape recording medium by the part 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and reproducing apparatus, and more particularly to a recording and reproducing apparatus for recording a television program on a magnetic tape recording medium and reproducing the recorded program.

[0002]

2. Description of the Related Art Digital television broadcasting and digital VTR
Digital recording devices, such as analog broadcasting and recording devices, can provide services such as video, audio, character data, and programs in a unified manner. Due to such a feature that the transmission band can be used efficiently by such a technique, it has been widely used in recent years.

Accordingly, it is possible to record a TV program distributed by digital TV broadcasting on a magnetic tape recording medium in a digital VTR device and to reproduce and use the program at a later point in time. The recording speed in the device and the transfer speed of the received data in digital broadcasting do not always match. For example, D
-Although the VHS format VTR device has a recording speed of about 14 Mbps, the transfer speed of digital broadcasting is an average of 6 Mbps.
Mbps, which is less than half the recording speed. Therefore, some adjustment or the like is required at the time of recording. This is because a recording format in a tape recording medium, that is, specifically, a track pattern in which information bits are written on a tape is fixed, regardless of the amount of data to be actually recorded. This is because it is necessary to keep the rotation speed of the tape and the tape feeding speed constant.

In a general recording / reproducing apparatus according to the prior art, the above-mentioned difference in speed is adjusted by recording dummy data in addition to digital broadcast reception data. Therefore, the received data and the dummy data are written in the information bit string written on the tape recording medium.

[0005] As a conventional technique capable of recording for a long time by utilizing the capacity of a recording medium without writing such dummy data, there is a recording method disclosed in Japanese Patent Application Laid-Open No. 9-306098. In this case, when the transfer speed of the received data is significantly lower than the recording speed of the digital VTR device, the writing to the tape recording medium is performed intermittently.

FIGS. 7A and 7B are diagrams for explaining this recording method according to the prior art. FIG. 7A shows the operation at the time of recording, and FIG. 7B shows the operation at the time of reproduction. As shown in FIG. 1A, the recording / reproducing apparatus (VTR apparatus) includes a memory 13, a control circuit 14, and a recording circuit 17, and performs recording on a tape recording medium 19. Further, as shown in FIG. 2B, a memory 23, a control circuit 24, and a reproduction circuit 20 are provided to reproduce data recorded on the tape recording medium 19. The operation of a conventional recording / reproducing apparatus for recording and reproducing data will be described below with reference to FIG.

As shown in FIG. 1A, received data S11 to be processed is input to the recording / reproducing apparatus. Further, a write enable signal S1 for instructing writing is provided.
2 is input to the memory 13 and the control circuit 14 of the recording / reproducing apparatus. The reception data S11 is written to the memory 13 at a substantially constant and relatively low speed in synchronization with the write enable signal S12. Further, the control circuit 14 bundles the input write enable signal S12, generates a read enable signal S14 for instructing reading, and outputs this to the memory 13 and the recording circuit 17.

The previously stored received data is read out from the memory 13 and output to the recording circuit 17, but since this reading is performed in synchronization with the read enable signal S14, the data is intermittently read. Reading is performed. On the other hand, the recording circuit 17 generates a recording current S18 based on the input read enable signal S14, and the recording current S18 magnetizes the tape recording medium 19,
Recording on the tape recording medium is performed. Therefore, the recording current S18 is output intermittently, and data is recorded on the tape recording medium 19 at intervals. As described above, the writing to the tape recording medium 19 is performed when the reception data S
Although the input speed is larger than the input speed of No. 11, the recording / reproducing apparatus adjusts the rate difference without inserting dummy data or the like by intermittently performing high-speed writing. .

If the recording on the tape recording medium 19 is continuously performed and the recording on the tail part of the tape recording medium is performed, the tape recording medium is rewound to a portion where the recording was not performed first. May be intermittently written. Therefore, the recording capacity of the tape recording medium can be utilized as much as the dummy data is not written.

Next, the tape recording medium 19 shown in FIG.
When reading data from the tape, the reproducing circuit 20 converts the data recorded from the tape recording medium 19 into a reproducing current S21.
And the obtained reproduction data S22 is stored in the memory 2
Write to 3. The writing to the memory 13 is performed in synchronization with the write enable signal S25 from the control circuit 24. Therefore, a series of data is obtained from the tape recording medium 19 by intermittent reading, and
Will be stored. In this way, the recording / reproducing apparatus can utilize the recording medium without recording the dummy data, and can appropriately reproduce the recorded data.

[0011]

As described above, according to the conventional technique, when recording received data in a VTR device, when writing dummy data to adjust a rate difference, use of a recording medium is attempted. The point that cannot be obtained is a problem. In the above example, the VTR device is about 14 Mbps
Recording speed of digital broadcasting is 6M on average
In the case of bps, more than half of the recording medium is not effectively used. Further, there is a problem in that the device resources of the VTR device are not utilized for writing and reading of the dummy data.

The above-described recording / reproducing apparatus (FIG. 7) addresses such a problem and utilizes a tape recording medium. However, this recording / reproducing apparatus still has the following problems. Had become. First, in this recording / reproducing apparatus, FIG.
As shown in the figure, when continuous data is recorded on the tape recording medium 19 at a recording position with an interval, when the data reaches the end of the tape recording medium 19, that is, after the first round of recording is completed, The second recording is performed by rewinding the tape. Therefore, by repeating such recording, the capacity of the recording medium is ultimately utilized, but there is a problem that the recording efficiency is reduced at the point where recording is interrupted during tape rewinding. or,
The same applies to reproduction, and reproduction is interrupted during tape rewinding.

In the above-described recording / reproducing apparatus, if the memory 13 has a large capacity and can store a series of received data (for one program, etc.), the tape recording medium 19 can be stored after the program reception is completed. It is also possible to perform recording on the data, and by performing the recording in this way, the rate difference can be adjusted. However, when such recording is performed, the VTR device and the tape recording medium cannot be used for other purposes until the recording on the tape recording medium is completed even after receiving the program. On the other hand, a user who is accustomed to using a general VTR apparatus which performs recording in parallel with reception may feel inconvenience that such a restriction exists, or take out a tape at the end of a program due to an error and perform recording. The problem is that there is a possibility that the operation is interrupted.

In digital broadcasting, data having a constant compression ratio is not always distributed due to the difference in compression encoding method and the nature of the data. In some cases, it is not easy to predict the amount of tape recording media that can be used. Another problem with the conventional recording apparatus is that recording may not be performed on an unrecorded portion of the recording medium due to a fear of insufficient volume, which may hinder efficient use.

The present invention has been made in view of the above circumstances, and is intended for use in a tape recording medium even when there is a difference between a reception rate and a recording rate or when data having a different compression rate is to be processed. It is an object of the present invention to provide a recording / reproducing apparatus which can utilize the recording capacity of the recording / reproducing apparatus and can avoid an adverse effect caused by interruption of the recording / reproducing operation.

[0016]

According to a first aspect of the present invention, there is provided a recording / reproducing apparatus including a large-capacity storage device capable of random access, and storing data on a magnetic tape recording medium. In accordance with a digital recording method, a recording / reproducing apparatus for reproducing data recorded on a magnetic tape recording medium generates a digital video signal from data received as a constituent of a certain program. A receiving unit for acquiring information about a program, including a fixed amount of a digital video signal generated by the receiving unit, information generated from the information about the program acquired by the receiving unit, and erasure availability information indicating whether or not erasure is possible. Mass storage for generating segment information and controlling reading and writing of the generated segment information to the mass storage device The storage management unit writes the segment information read from the mass storage device by the mass storage device management unit to the magnetic tape recording medium, and reads the data recorded on the magnetic tape recording medium. And a tape drive unit.

According to a second aspect of the present invention, there is provided a recording / reproducing apparatus,
2. The apparatus according to claim 1, wherein the mass storage device management unit generates the segment information as the erasability information indicating that erasure is not possible, writes the segment information into the mass storage device, and writes the written segment. The information is read out according to the time series indicated by the information generated from the information on the program in the segment information, the read segment information is output to the tape drive unit, and the segment stored in the mass storage device is stored. The erasability information is changed to information indicating erasability in the information, and in writing the segment information to the mass storage device, the erasability information is erasable in the storage portion of the mass storage device. To the storage part holding the segment information indicating the That is intended to be written in order of time sequence indicated by the information generated from the information.

Further, the recording / reproducing apparatus according to claim 3 comprises:
3. The apparatus according to claim 1, further comprising a user interface unit for notifying a user of information relating to recording and reproduction, wherein said tape drive unit detects a remaining amount of said magnetic tape recording medium. The mass storage device management unit reads segment information from the mass storage device when the remaining amount of tape detected by the tape drive unit falls below a predetermined value. Instead, the user interface unit is instructed to notify the user of a request to change the tape.

Further, the recording / reproducing apparatus according to claim 4 comprises:
4. The apparatus according to claim 1, wherein the mass storage device management unit outputs information indicating a transfer speed of the received data based on a generation state of the segment information, and The drive unit has a tape remaining amount detecting function of detecting the remaining amount of the magnetic tape recording medium, and the information regarding the program acquired by the receiving unit and the receiving unit output by the mass storage device managing unit. A database unit that holds information indicating a data transfer speed; a tape remaining amount detected by the tape drive unit; and a determination whether the remaining tape amount is sufficient based on information held by the database unit. And a user interface unit for notifying the user of the result of the determination.

According to a fifth aspect of the present invention, there is provided a recording / reproducing apparatus.
5. The apparatus according to claim 1, wherein the mass storage device management unit outputs information indicating a transfer speed of the received data based on a generation state of the segment information. The segment information is read out from the large-capacity storage device in accordance with information input from a prediction control unit described later. The information on the program acquired by the receiving unit and the large-capacity storage device management unit A database unit that stores information indicating the transfer speed of the received data output by the mass storage device; information indicating the transfer speed of the received data output by the mass storage device management unit; and information stored by the database unit. A prediction control unit that performs prediction on the reception speed based on the information, and outputs information indicating a result of the prediction to the mass storage device management unit. Those with further.

Further, the recording / reproducing apparatus according to claim 6 is
6. The apparatus according to claim 1, wherein the mass storage device management unit outputs information indicating a transfer speed of the received data based on a generation state of the segment information. The segment information is read out from the large-capacity storage device in accordance with information input from a prediction control unit described later. By monitoring information output by the reception unit, identification in the program is performed. A specific information detection unit that detects a portion that transmits the type of information, information on the program acquired by the reception unit,
A database unit that holds a result of the detection by the specific information detection unit, information indicating a transfer speed of the received data output by the mass storage device management unit, and information held by the database unit. A prediction control unit that predicts a point in time when the specific type of information is transmitted, and outputs information indicating a result of the prediction to the mass storage device management unit. .

Further, the recording / reproducing apparatus according to claim 7 is
7. The apparatus according to claim 6, wherein the tape drive unit has a tape remaining amount detecting function of detecting a remaining amount of the magnetic tape recording medium, and further includes a result of the detection and an input from a prediction control unit described later. And a display unit for displaying information to be transmitted, wherein the prediction control unit performs a prediction on a result of detection of the remaining amount of tape in the tape drive unit and a time when the specific type of information is transmitted. Is used to determine whether or not the remaining amount of the tape is sufficient, and outputs information indicating the result of the determination to the tape drive unit.

Further, the recording / reproducing apparatus according to claim 8 comprises:
8. The apparatus according to claim 6, wherein the receiving unit receives digital data, and the specific information detecting unit performs the detection based on information about a time given to a packet constituting the digital data. Things.

According to a ninth aspect of the present invention, there is provided a recording / reproducing apparatus comprising:
8. The apparatus according to claim 6, wherein the receiving unit receives the analog data and generates a digital video signal by a predetermined process, and the specific information detecting unit performs a multiplexed audio broadcast on the analog data and a monaural signal. The above detection is performed based on a change point from the broadcast.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 The recording / playback apparatus according to the first embodiment of the present invention reads and writes data in segments in a high-speed storage device. FIG. 1 is a block diagram showing the configuration of the recording / playback apparatus according to the first embodiment. As shown in the figure, the recording / playback apparatus according to the first embodiment includes a receiving unit 1a, a memory management unit 2a,
It has a large-capacity memory device 3a and a tape drive unit 4a, and inputs data constituting a program as a device input during recording, and outputs data constituting a program as a device output during reproduction.

The receiving section 1a inputs data constituting a program which is an apparatus input, outputs a digital video signal of the program on the basis of the data, and outputs an electronic program guide and program title information relating to the program. Extract.
In the first embodiment, the receiving unit 1a has an encoding function, and when an analog signal is input,
A digital video signal is generated and output by an encoding process. Further, the electronic program guide and the program title information extracted by the receiving unit 1a are used as those included in the reception data in digital broadcasting or those included in the vertical retrace interval in analog broadcasting.

The memory management unit 2a is a large-capacity memory device 3
It manages reading and writing of data to a.
Reading and writing of data are performed in units of segments each having a fixed capacity. Large-capacity memory device 3a
Is a storage medium capable of random access and capable of reading and writing data at high speed, and can be realized by a hard disk device or the like. The tape drive unit 4a reads and writes data from and to a tape recording medium.

The operation of the recording / reproducing apparatus according to the first embodiment configured as described above when recording a program will be described below. At the time of recording, first, received data is input to the receiving unit 1a. The receiving unit 1a generates a digital video signal by extracting a digital video signal of a program when receiving a digital broadcast and performing an encoding process when receiving an analog broadcast. Then, the receiving unit 1a outputs the digital video signal to the memory management unit 2a. The receiving unit 1a also extracts an electronic program guide and program title information from the received data and outputs them to the memory management unit 2a.

The memory management unit 2a divides the digital video signal input from the reception unit 1a at regular time intervals,
For the unit digital video signal obtained by the division,
A segment is generated by adding time information and program title information based on the electronic program guide and program title information input from the receiving unit 1a, and further adding an erasure prohibition flag indicating whether or not the data can be erased. Are output to the large-capacity memory device 3a. Therefore, the large-capacity memory device 3
In a, a segment having an erasure prohibition flag indicating that erasure is impossible is stored.

The memory management unit 2a reads data for each segment from the large-capacity memory device 3a, and outputs the read segment to the tape drive unit 4a from the memory management unit 2a. Recorded on the medium. For the segment recorded in the tape drive unit 4a, the memory management unit 2a stores the segment by clearing the erasure prohibition flag of the segment stored in the large-capacity memory device 3a to indicate that erasure is possible. It is assumed that the stored memory part can be used.

The memory management unit 2a reuses the used area of the large-capacity memory device 3a as necessary at the time of recording. In this case, of the segments stored in the large-capacity memory device 3a, the portion storing the one in which the erase prohibition flag is cleared is to be reused. The memory management unit 2a refers to the time information of the target segment, and overwrites the storage part with a new segment in order from the one stored first, thereby performing reuse. .

For a segment for which the erasure prohibition flag is set (not cleared), it means that the video signal of the segment has not yet been recorded on the tape recording medium. The storage area storing such a segment is not overwritten. Therefore, in the segment that is not recorded on the tape for some reason while recording the received program, the segment is held in a state where the erasure prohibition flag is set in the large-capacity memory device 3a until the end of recording. Become.

As described above, in the recording / playback apparatus of the first embodiment, a received program is recorded. The operation of playing back the program recorded as described above will be described below. . When the reproduction is started, the tape drive unit 4a reads out data from the tape recording medium and outputs this to the memory management unit 2a. The memory management unit 2a determines whether or not the segment is held in the large-capacity memory device 3a by referring to the time information and the program title information for each segment of the input data. Only when the segment is not held in the large-capacity memory device 3a, the memory management unit 2a
Writes the data input from the tape drive unit 4a to the large-capacity memory device 3a.

Thus, in the recording / reproducing apparatus according to the first embodiment, the part overlapping the tape recording medium in the program to be reproduced and the large-capacity memory device 3a are not recorded on the tape recording medium. Skipping can be performed. As described above, the memory management unit 2a reuses the storage portions of the large-capacity memory device 3a in order from the portion recorded on the tape medium first. In a case where the possibility that the program to be reproduced is likely to be held in the large-capacity memory device 3a is high and all the programs to be reproduced are held in the large-capacity memory device 3a, the recording / reproducing device of the first embodiment promptly The tape drive unit 4a can be released, and an arbitrary part in the program can be displayed.

As for the part which has not been recorded on the tape recording medium at the time of recording, the part is held in the large-capacity memory device 3a as a non-erasable state as described above. The other part of the program is held in the large-capacity memory device 3a in an erasable state, or is read from the tape recording medium and stored, whereby the entire program is stored in the large-capacity memory device 3a. Is restored and held.

In any case, if all the segments constituting the program are stored in the large-capacity memory device 3a, the memory management unit 2a determines the data stored in the large-capacity memory device 3a. A segment constituting a program to be reproduced is specified based on the program title information assigned to each segment, and the segments are sequentially read out according to the time information assigned to such a segment to sequentially read the program title information, time information, and erasure. By removing the prohibition flag, the video data in the segment
It is output to the outside as a device output of the recording / playback device. The device output is used externally for display, transmission, and the like.

As described above, according to the recording / reproducing apparatus of the first embodiment, the receiving section 1a, the memory managing section 2a, the large-capacity memory device 3a, and the tape drive section 4a are provided. The read / write of data in the large-capacity memory device 3a is controlled in units of segments including the time information, the program title information, and the erasure prohibition flag. Even when recording on a tape recording medium is interrupted at the time of recording of a certain program in the apparatus, it is possible to appropriately reproduce the program.

Embodiment 2 The recording / playback apparatus according to the first embodiment of the present invention reads and writes data in units of segments in a high-speed storage device, and further manages a tape recording medium. FIG.
FIG. 4 is a block diagram illustrating a configuration of a recording / playback device according to a second embodiment. As shown in the figure, the recording / playback apparatus according to the second embodiment includes a receiving unit 1b, a memory management unit 2b, a large-capacity memory device 3b, a tape drive unit 4b, and a user interface unit 5b. As in the case of the playback device, data constituting a program is input as a device input during recording, and data constituting a program is output as a device output during playback.

The user interface unit 5b notifies the user of the recording / reproducing state of the recording / reproducing apparatus, and receives an instruction from the user. The memory management unit 2b controls reading and writing of data in the large-capacity memory device 3b in the same manner as 2a included in the device of the first embodiment, but in the second embodiment, the user interface unit 5b
Is transmitted to the user via the PC. The tape drive unit 4b performs reading and writing on a tape recording medium in the same manner as 4a included in the device of the first embodiment, but in the second embodiment, the tape drive unit 4b has a tape remaining amount detecting function. , In certain cases,
It detects the recordable capacity of the tape recording medium and outputs this to the memory management unit 2a as the remaining tape capacity. The receiving unit 1b and the large-capacity memory device 3b are the same as 1a and 3a included in the device of the first embodiment.

The operation of the recording / reproducing apparatus thus configured according to the second embodiment when recording a program will be described below. As in the case of the apparatus of the first embodiment, at the time of recording, received data is input to the receiving unit 1b and the receiving unit 1b
Outputs a digital video signal, an electronic program guide, and program title information to the memory management unit 2b.

The memory management unit 2b generates segments in the same manner as the memory management unit 2a of the first embodiment, and stores the segments in the large-capacity memory device 3b in segment units. The management unit 2b constantly monitors the storage state in the large-capacity memory device 3b,
If it is detected in the large-capacity memory device 3b that the segment in which the erasure inhibition flag is set is stored,
The user interface unit 5b is instructed to notify the user that the large-capacity memory device 3b is "in use".
The user is notified of this by displaying "D in use".

The reading of each segment from the large-capacity memory device 3b by the memory management unit 2b and the recording on the tape recording medium by the tape drive unit 4b are performed in the same manner as in the first embodiment. Then, the tape remaining amount detection function of the tape drive unit 4b, the notification and the instruction reception in the user interface unit 5b,
The following management of the tape recording medium is performed.

The above-described detection of the remaining amount of tape in the tape drive unit 4b is performed when the tape recording medium is inserted, when the user issues an instruction to inquire the remaining amount of tape via the user interface unit 5b, and This is performed when there is no more recordable portion on the recording medium (that is, when the remaining amount is 0). In these cases, the tape drive unit 4b detects the remaining amount of the currently used tape recording medium, and outputs information indicating the remaining amount to the memory management unit 2b.

Thus, when the remaining amount of the tape recording medium on which recording is being performed during recording is exhausted, information indicating that the remaining amount has become 0 is output to the memory management unit 2b. And the memory management unit 2b
, And the output of the read data to the tape drive unit 4b is stopped, and the tape drive unit 4b is instructed to eject the remaining zero-length tape recording medium. In response, the tape drive unit 4b ejects the tape recording medium having the remaining amount of 0.

Further, the memory management unit 2b does not stop storing the received data in the large-capacity memory device 3b, and notifies the user interface unit 5b of the fact that the remaining amount of the tape is exhausted. And tell them to notify. The user interface unit 5b notifies the user of the fact by display or the like.

When the user knows that the remaining amount of the tape is exhausted, the user inserts the remaining tape recording medium into the tape drive unit 4b.
, The tape drive unit 4b detects the remaining amount in response to the insertion of the tape recording medium, and outputs information indicating the remaining amount to the memory management unit 2b. Memory management unit 2
b can determine from this information that recording on the tape recording medium has become possible, so that reading from the large-capacity memory device 3b and output of the read data to the tape drive unit 4b are resumed, and the tape drive unit In 4b, recording on a new tape recording medium is continued.

At this time, the memory management unit 2b indicates that the assigned program title information in the segment stored in the large-capacity memory device 3b indicates that the program is currently being recorded, and that erasure is prohibited. The data with the flag set is transferred in the order of the assigned time information, so that the data to be subsequently recorded is appropriately processed. Therefore, even if the recording on the tape recording medium is interrupted due to the tape exchange, a part of the program is not lost due to the interruption. In addition, the memory management unit 2b instructs the user interface unit 5b to stop the notification that the remaining tape amount has run out, and the user interface unit 5b stops the display to the user.

On the other hand, even when a new tape recording medium is not inserted by the user, storage of each segment in the large-capacity memory device 3b is continued as described above. Therefore, even when the program ends without inserting a new tape recording medium, the segments not recorded on the tape recording medium are stored in the large-capacity memory device 3b with the erasure prohibition flag set. Becomes Therefore, similar to the recording / reproducing apparatus of the first embodiment, the reproduction of the program in the recording / reproducing apparatus is performed without any trouble. However, since the recording is not performed on the tape recording medium, the entire program is reproduced in another reproducing apparatus. Cannot be performed, and the storage capacity of the large-capacity memory device 3b remains consumed.

In the recording / reproducing apparatus according to the second embodiment, as described above, when the segment in which the erasure inhibition flag is set is held in the large-capacity memory device 3b, the large-capacity memory device 3b is in use. Is notified to the user, and in response to this notification, the user can perform recording on the tape recording medium by inserting a new tape recording medium at any time. . That is, it is possible to record a part that is not recorded on the tape recording medium before and after reproducing the recorded program. When a new tape recording medium (with a remaining tape) is inserted by the user, the subsequent portion of the program is appropriately recorded on the new tape recording medium without omission as described above. The Rukoto.

As described above, the recording / reproducing apparatus of the second embodiment records a received program. The operation of reproducing the program recorded as described above will be described below. . When the reproduction is started, the first embodiment
The tape drive unit 4a
Reads the data from the tape recording medium, and the memory management unit 2a uses the large-capacity memory device 3
Then, the segment read from the tape recording medium is stored in the large-capacity memory device 3b, if necessary, by collating with the data held in b.

In the second embodiment, the following operation is performed when the remaining amount of the tape recording medium is exhausted during reproduction of a certain program. As in the case of recording, the remaining amount is detected in the tape drive unit 4b, and information indicating the remaining amount 0 is output to the memory management unit 2b. The data transfer to the device 3b is stopped, and the tape drive unit 4b is instructed to eject the remaining tape recording medium, and the tape drive unit 4b ejects the tape recording medium.

The memory management unit 2b does not stop reading from the large-capacity memory device 3b and outputting data, which is the device output of the recording / reproducing device, to the outside. Against
The user is instructed to notify the user that the tape recording medium on which subsequent recording has been performed should be inserted. The user interface unit 5b notifies the user of the fact by display or the like.

If the user inserts a subsequent tape recording medium in the tape drive unit 4b in response to the notification, the tape drive unit 4b detects the remaining amount in response to the insertion of the tape recording medium, and The information indicating the amount is output to the memory management unit 2b. The memory management unit 2b resumes storage in the large-capacity memory device 3b, and reading from the new tape recording medium is continued in the tape drive unit 4b. Further, the memory management unit 2b instructs the user interface unit 5b to stop the notification of the instruction to change the tape, and the user interface unit 5b stops the display to the user.

Therefore, even when the tape recording medium is exchanged at the time of reproduction, the reproduction is not interrupted immediately, and if the user changes the tape promptly, the reproduction is continued without interruption. It is also possible.

As described above, according to the recording / reproducing apparatus of the second embodiment, the receiving section 1b, the memory managing section 2b, the large-capacity memory device 3b, the tape drive section 4b, and the user interface section 5b are provided. Since the unit 2b controls the reading and writing of data in the large-capacity memory device 3a in units of segments as in the first embodiment, the unit 2b efficiently uses the tape recording medium and uses the tape recording medium. When recording a program,
Even if the recording on the tape recording medium is interrupted,
It is possible to appropriately reproduce the program. Further, detection of the remaining amount of tape in the tape drive unit 4b,
By notifying the user in the user interface unit 5b, even when the tape recording medium needs to be replaced during recording or playback, the tape recording medium can be smoothly and without any loss. It becomes possible to continue recording and playback by exchanging.

Embodiment 3 The recording / reproducing apparatus according to the third embodiment of the present invention performs data management in segment units and management of a tape recording medium, and further predicts a necessary amount of a tape recording medium. FIG. 3 is a block diagram showing the configuration of the recording / playback apparatus according to the third embodiment. As shown in the figure, the recording / playback apparatus according to the third embodiment includes a receiving unit 1c, a memory management unit 2c, a large-capacity memory device 3c, a tape drive unit 4c, a user interface unit 5c, and a database unit 6c. Form 1
As in the case of the recording / reproducing apparatus described above, data constituting a program is input as an apparatus input during recording, and data constituting a program is output as an apparatus output during reproduction.

The receiving section 1c outputs the digital video signal, the electronic program guide, and the program title information to the memory management section 2c as in 1a and 1b of the first and second embodiments. The program guide and the program title information are also output to the database unit 6c. The memory management unit 2c has the same function as 2b included in the device according to the second embodiment. Output to the database unit 6c. The user interface unit 5c performs notification to the user and accepts an instruction in the same manner as 5b provided in the device of the second embodiment. , Predicts the required amount of tape recording medium, and announces it. The database unit 6c holds the electronic program guide and the program title information input from the receiving unit 1c and the transfer speed information input from the memory management unit 2c in association with each other as history information. The large-capacity memory device 3c and the tape drive unit 4c are the same as 3b and 4b provided in the device of the second embodiment.

According to the recording / reproducing apparatus of the first embodiment, the received data is temporarily stored in the large-capacity memory device 3a and recorded on the tape recording medium at a rate higher than the transfer rate of the received data. However, unlike the conventional recording method of writing dummy data, the consumption amount of the tape recording medium changes depending on the transfer speed of the received data. It is difficult to predict the capacity of a tape recording medium required for recording a program, and it is difficult to determine whether a program can be recorded depending on the remaining amount of the tape recording medium.

In the recording / playback apparatus of the first embodiment,
Even if the recording on the tape recording medium is interrupted during the recording of a certain program, the program can be reproduced without omission,
In the recording / reproducing apparatus according to the second embodiment, an appropriate process is further performed in response to a tape change at the time of recording / reproducing. However, it is difficult to predict the required amount of the tape recording medium. This problem becomes remarkable when it is desired to make a scheduled recording of a program.

Therefore, the recording / reproducing apparatus according to the third embodiment predicts the required capacity of the tape recording medium at the time of programmed recording of a program. Such an operation at the time of recording in the recording / playback apparatus according to the third embodiment will be described below. When a recording reservation is made for a certain program, the user inputs a reservation recording instruction specifying the program to the user interface unit 5c. Then, the user interface unit 5c refers to the program title information in the contents held by the database unit 6c, and searches whether or not a program having the same title as the program for which the scheduled recording has been instructed exists in the history information. .

Then, the user interface unit 5c
If a program with the same title exists, the total number of segments generated at the time of recording the program from the history information is acquired from the transfer speed information, and the necessary amount of the tape recording medium is predicted based on this. If a plurality of histories are stored in the history information, the necessary amount is predicted based on all of them, and the average value and the variance value are calculated based on the plurality of predicted necessary amounts. On the other hand, when only one history is stored in the history information, the estimated necessary amount is used without calculating the average value, and the value proportional to the reception time obtained from the preset default value is used. Is a substitute for the variance value. If a program with the same title does not exist in the history information as a result of the search, a value proportional to the reception time obtained from a preset default value is used for the average value as well as the variance value.

When the average value and the variance value are obtained, the user interface unit 5c displays the acquired average value as a predicted required amount, etc., and also detects the remaining tape amount as in the second embodiment. Is displayed to notify the user. Accordingly, the user interface unit compares the value obtained as a result of adding the variance value to the obtained average value with the above-mentioned remaining tape amount, and determines whether the remaining tape amount is sufficient. A determination is made as to whether or not the recording is sufficient.

On the other hand, the user interface unit 5
If it is determined that the remaining amount of tape is not sufficient according to the determination in step c, the user interface unit 5c displays a warning to the user that the remaining amount is not sufficient to determine whether the "reservation execution" is performed. Ask for one of "tape change" instructions. In response to this, the user executes “Reserve”
When the user instructs "tape change", the remaining tape is detected in response to the user's insertion of a new tape recording medium. Will be determined.

When a recording reservation is accepted, recording starting at the reserved time is performed in the same manner as in the second embodiment. Therefore, even when the tape recording medium is exhausted during recording and the user does not perform tape replacement during recording, the user can insert a new tape recording medium at any time, Recording without any omission can be performed. Playback of the recorded program is performed in the same manner as in the case of the recording / playback apparatus of the second embodiment.

As described above, according to the recording / playback apparatus of the third embodiment, the receiving unit 1c, the memory management unit 2c, the large-capacity memory device 3c, the tape drive unit 4c, the user interface unit 5c, and the database unit 6c In the same manner as in the first embodiment, the input / output management is performed in units of segments in the large-capacity memory device 3c. Based on the information, the necessary amount of the tape recording medium is predicted, so that the tape recording medium can be efficiently used, and the recording and playback can be smoothly performed without any loss. It is possible to select a recording medium that can save the trouble of replacement.

Embodiment 4 The recording / playback apparatus according to the fourth embodiment of the present invention performs data management in segment units and management of a tape recording medium, and further predicts a transfer speed and controls recording in accordance with the prediction. is there. FIG. 4 is a block diagram illustrating a configuration of a recording / playback apparatus according to the fourth embodiment. As shown in the figure, the recording / playback apparatus according to the fourth embodiment includes a receiving unit 1d, a memory management unit 2d,
It includes a large-capacity memory device 3d, a tape drive unit 4d, a database unit 6d, and a prediction control unit 7d. Like the recording / playback device according to the first embodiment, it inputs data constituting a program as a device input during recording. During reproduction, data constituting a program is output as an apparatus output.

The database section 6d stores the electronic program guide, program title information input from the receiving section 1d, and the transfer rate information input from the memory management section 2d, similarly to the database section 6c provided in the apparatus of the third embodiment. In the fourth embodiment, the database unit 6d receives the transfer speed information indicated by the transfer speed information input from the memory management unit 2d, and stores the history information in the reception unit 1c. Based on information indicated by the input electronic program table and program title table, history information in which a program title and a reception date and time are assigned as indexes is held.

At the time of recording, the prediction control unit 7d refers to the history information held by the database unit 6d, and predicts the hourly transfer speed of the received data of the program to be recorded based on the history information. The memory management unit 2d is different from the third embodiment.
Has the same function as the memory management unit 2c included in the device,
Further, information indicating the number of generated segments is also output to the prediction control unit 7d. Receiver 1d, large-capacity memory device 3
d and the tape drive unit 4d are the same as 1c, 3c, and 4c included in the device of the third embodiment.

According to the recording / reproducing apparatus of the first to third embodiments, the received data is temporarily stored in the large-capacity memory device and recorded on the tape recording medium at a rate higher than the transfer rate of the received data. Although it is possible to reduce the consumption of the medium, in the case of performing the recording in this way, the recording on the tape recording medium usually ends later than the end of the reception of the program. Because the tape drive is in a restrained state,
The user may feel inconvenience or cause an erroneous operation.

Therefore, the recording / reproducing apparatus of the fourth embodiment predicts the transfer rate at the time of recording, controls the recording processing according to the prediction, and reduces the delay at the end of recording with respect to the end of reception. It is intended to solve such a problem. The operation of the recording / playback apparatus according to the fourth embodiment when recording is described below.

At the time of recording, the prediction control section 7d refers to the history information held in the database section 6d, and determines whether or not information indicating the transfer speed of the program to be recorded is held, by using an index indicating the program title. Search by. If one piece of history information corresponding to the program title is held, and if a plurality of pieces of history information are held based on the transfer speed included in the history information, the prediction control unit 7d starts a program for those pieces of history information. Further, an average for each time is obtained, and a predicted transfer rate (estimated value) for each hour is generated based on the average. On the other hand, when the corresponding history information is not stored in the database unit 6d, the prediction control unit 7d sets “no predicted value”.

When the input of the program data to the receiving unit 1d is started, the digital video signal, the electronic program guide, and the program title information are output from the receiving unit 1d, and are output to the large-capacity memory device 3d in the memory management unit 2d. Is stored for each segment, but in the fourth embodiment,
Immediately after recording, the memory management unit 2d does not perform reading of each segment from the large-capacity memory device 3d and transfer to the tape drive unit 4d. Then, as described above, the memory management unit 2d outputs information indicating the generated number of segments to the prediction control unit 7d.

The prediction control unit 7d integrates the number of generated segments indicated by the information input from the memory management unit 2d, generates a reception result value based on the number, and compares the reception result value with the previously generated prediction value. Is corrected using. Then, the prediction control unit 7d calculates the predicted reception data amount until the end of the program by:
This is calculated based on the corrected predicted value, the predicted received data amount is added to the received data amount indicated by the reception result value, and the obtained data amount added value is set as the dividend to the maximum in the tape drive unit 4d. A division process is performed using the recording speed as a divisor to generate an estimated required recording time.

The prediction control unit 7d detects the time from the point in time to the end of the program, compares the detected time with the estimated required recording time, and when they match, stores information indicating the match to the memory management unit. 2d, the memory management unit 2d starts reading each segment from the large-capacity memory device 3d and transferring it to the tape drive unit 4d when the information indicating the coincidence is input, In the tape drive section 4d, recording on a tape recording medium is performed.

As described above, the prediction control section 7d provided in the recording / reproducing apparatus according to the fourth embodiment refers to the past reception history stored in the database section 6d, and thereby, the program having the same title as the program to be recorded is provided. The transfer rate information is obtained, and by using this information and the transfer rate information of the currently received data, the amount of received data is predicted, and the prediction accuracy is improved.

In general, in digital broadcasting, one of the advantages is to use the transmission band efficiently as described above. For this reason, it is necessary for a plurality of programs to share a channel having a certain bandwidth. Is performed. Therefore,
Due to the influence of another program that shares a channel with a target program, the transfer speed may change during the broadcast of the program. Therefore, when receiving a digital broadcast, the reception speed is not always constant, and the transfer speed (reception speed) at a certain point in time is detected, and the amount of data to be transferred is predicted based on the detected transfer speed. However, the prediction is not always accurate. For this reason, in the fourth embodiment, the prediction control unit 7d refers to the past reception history to improve the accuracy of prediction of a program that is repeatedly broadcast on a daily or weekly basis.

The reason why it is necessary to improve the accuracy of the prediction is that if the predicted value is not appropriate, the following inconvenience occurs. In other words, if the predicted value of the transfer rate is too small, that is, if the transfer rate of the received data until the end of the program exceeds the predicted value, the large-capacity memory device 3d will continue to operate even after the end of the program reception. The unrecorded segment remains on the tape recording medium, and the recording in the tape drive unit 4d is continued until the segment no longer exists. Therefore, the problem caused by the delay of the recording end as described above cannot be solved. It will be.

On the other hand, if the predicted transfer rate value is excessive, that is, if the transfer rate of the received data until the end of the program is lower than the predicted value,
Before the end of the program reception, there is no segment in the large-capacity memory device 3d that has not yet been recorded on the tape recording medium. And the recording ends at the same time as the reception of the program, so that the tape recording medium cannot be used efficiently.
Therefore, in the fourth embodiment, the occurrence of these inconveniences is avoided by improving the prediction accuracy as described above.

The recording / playback apparatus of the fourth embodiment is similar to the first embodiment except that the prediction control section 7d and the memory management section 2d control the recording. And playback operation.

As described above, according to the recording / playback apparatus of the fourth embodiment, the receiving unit 1d, the memory management unit 2d, the large-capacity memory device 3d, the tape drive unit 4d, the database unit 6d, and the prediction control unit 7d In the same manner as in the first embodiment, the input / output management is performed in units of segments in the large-capacity memory device 3d, so that the tape recording medium can be used efficiently. Using the information input from 2d, the prediction control unit 7d predicts the data reception status, and according to the prediction,
Since the memory management unit 2d controls recording on the tape recording medium in the tape drive unit 4d, it is possible to avoid a problem caused by delaying the recording end time with respect to the reception end time.

Embodiment 5 The recording / reproducing apparatus according to the fifth embodiment of the present invention performs data management in segment units, controls recording in accordance with transfer rate prediction, detects a CM section in a program, and records in response to this. To control. FIG. 5 is a block diagram showing a configuration of a recording / playback apparatus according to the fifth embodiment. As shown in the figure, the recording / playback apparatus according to the fifth embodiment includes a receiving unit 1e, a memory management unit 2e, a large-capacity memory device 3e, a tape drive unit 4e,
Database unit 6e, prediction control unit 7e, and analysis unit 8
e, as in the recording / playback apparatus of the first embodiment, inputs data constituting a program as a device input at the time of recording, and outputs data constituting the program as a device output at the time of playback. is there.

The receiving section 1e outputs the digital video signal to the memory management section 2e and the electronic program guide and the program title table to the database section 6e, similarly to the receiving section 1d provided in the apparatus of the fourth embodiment. , Receiving unit 1 of the fifth embodiment
e also outputs the digital video signal, the electronic program guide, and the program title table to the analysis unit 8e described later.

The database section 6e is provided with the database sections 6c and 6d provided in the devices of the third and fourth embodiments.
Similarly, the electronic program guide, the program title information input from the receiving unit 1e, and the transfer speed information input from the memory management unit 2e are held as history information in association with each other.
The database unit 6e according to the fifth embodiment inputs CM section information from an analysis unit 8e described later.
M section information. Based on information indicated by the electronic program guide and the program title table input from the receiving unit 1c, history information in which a program title and a reception date and time are assigned as indexes is held.

The prediction control unit 7e predicts the CM insertion time by referring to the information held by the database unit 6e. The analyzing unit 8e monitors the electronic program guide, the program title table, and the digital video signal output from the receiving unit 1e, and detects a CM section (CM section) inserted in the program based on these. The memory management unit 2e, the large-capacity memory device 3e, and the tape drive unit 4e are the same as 2e, 3e, and 4e provided in the device of the fourth embodiment.

The recording / reproducing apparatus of the fifth embodiment configured as described above controls the recording corresponding to the prediction of the prediction control unit, similarly to the apparatus of the fourth embodiment. In the apparatus of the fourth embodiment, control is performed so that the time of the end of recording is adjusted to the time of the end of the reception of the program.
Is treated as a unit recording section, and control is performed such that recording of the unit recording section on the tape recording medium ends in accordance with the start of a CM inserted in the program.

[0086] By treating such a unit recording section as one unit, the difference between the reception time and the recording time on the tape recording medium is reduced as compared with the case where the whole program is treated as one unit. This is for planning. That is, in the fifth embodiment, when the recording is stopped during the CM, the received program is already recorded on the tape recording medium, and the recording is performed without waiting for the start of the CM. Even in the case where the CM is stopped, the CM immediately before the CM is already recorded on the tape recording medium, and data loss due to the stop can be reduced.

When recording is performed intermittently, a reproduction error occurs at the joint of recording due to acceleration / deceleration of the tape / head system and discontinuity of the track pattern, which may cause reproduction noise. This can occur in the recording / reproducing apparatus according to the first to fourth embodiments and also in the recording / reproducing apparatus according to the fifth embodiment. However, in the fifth embodiment, since the seam portion having such a possibility corresponds to a CM section, noise generation can be reduced in a program body (other than a CM) portion. .

The operation of the recording / playback apparatus according to the fifth embodiment when recording a program will be described below. Receiver 1
When the input of the program data to e starts, the receiving unit 1
e, the output of the digital video signal, the electronic program guide, and the program title information, and the storage of each segment in the large-capacity memory device 3e in the memory management unit 2e are executed. Also in the fifth embodiment, similarly to the fourth embodiment, the memory management unit 2e continues to input the signal indicating the coincidence from the prediction control unit described later until the memory management unit 2e receives the segment from the large-capacity memory device 3e for each segment. Reading and transfer to the tape drive unit 4e are not performed. Accordingly, in the fifth embodiment, the output from the receiving unit 1e is also sent to the analyzing unit 8e as described above, and the analyzing unit 8e detects a CM section as described below.

FIG. 6 is a diagram for explaining a method of detecting a CM section in the analyzing unit 8e, and is a diagram showing a relationship between a packet number assigned to a packet which is a unit of data transmission in digital broadcasting and time. It is. Generally, when producing a program in digital broadcasting, after compressing digital data of an image and audio to be included in the program, packetization for generating a packet having a predetermined size is performed. A series of packet numbers called time stamps are added as information for synchronizing outputs. On the other hand, since the CM is produced separately from the program into which the CM is inserted, a series of packet numbers different from the series of packet numbers constituting the program are assigned.

Therefore, as shown in FIG. 6, the packet number changes continuously in each of the relatively long-term program section and the relatively short-term CM section. The packet number is discontinuous between the program main section and the CM section or between the CM sections.
That is, the discontinuity of the packet numbers before and after the CM is observed. Therefore, the program main section and the CM section are separated from each other by the discontinuity of the packet number, and since the CM section is shorter in duration than the program main section as described above, these can be easily identified. It is. In the case shown in the figure, the program start time (time A),
Time A to time B, time C to time D, time D to time E, and time F to time G between the end of the program (time G).
It can be seen that the CM is inserted in the period of. further,
Since the time stamps, which are packet numbers, are continuous between the time point C and the time point E, it is determined that the section from time C to time E is a CM section.

The analyzing unit 8e can detect the discontinuity of the packet number as described above, and can specify the CM section based on the length of the section divided by the discontinuity. In addition,
As another method for detecting the CM section in the analysis unit 8e, a method of identifying a stereo multiplex sound section and a monaural sound section in analog broadcasting can be used.

The analysis unit 8e outputs information indicating the result of the CM section detection to the database unit 6e.
e holds the CM section information as history information in association with the title of the program and the reception date and time. And
In the fifth embodiment, the prediction control unit 7e refers to the history information held in the database unit 6e at the time of recording, and sets the C included in the history information corresponding to the title of the program to be recorded.
The CM insertion time is predicted based on the M section information.

Further, as in the fourth embodiment, information indicating the number of generated segments is also input from the memory control unit 2e to the prediction control unit 7e.
Accumulates the number of segments starting from the start time of the unit recording section. This is because in the fifth embodiment, as described above,
This is because the unit recording section is treated as one unit. The prediction control unit 7e sums the received data amount acquired by the integration and the predicted received data amount up to the end of the unit recording section, sets the sum as a dividend, and sets the tape drive unit 4
A division process is performed using the maximum recording speed in e as a divisor to estimate the required recording time. The prediction control unit 7e compares the estimated required recording time with the predicted time until the CM insertion time, and when both match, outputs information indicating that to the memory management unit 2e.

When the information indicating the coincidence is input, the memory management unit 2e starts reading out each segment from the large-capacity memory device 3e and transferring it to the tape drive unit 4e. In, recording on a tape recording medium is performed. Therefore, at the time of the start of the next CM to be inserted, recording on the tape recording medium for the unit recording section in the program ends. The prediction control unit 7e and the memory management unit 2e as described above
The recording and playback device of the fifth embodiment performs the same recording and playback operations as those of the first embodiment except that the recording is controlled by the following.

Next, a recording / reproducing apparatus as an application example of the fifth embodiment will be described. This application example has the same configuration as that of the recording / playback apparatus of the fifth embodiment shown in FIG. 5, but the tape drive unit 4e has the same structure as the tape drive unit 4c of the third embodiment. It has a function of detecting the remaining amount, and includes a display unit for notifying the user, similarly to the user interface unit of the embodiment.

The prediction control section 7e predicts the capacity of the tape recording medium required for recording on the tape recording medium for each unit recording section. This prediction consumption amount and the tape consumption obtained from the tape drive section 4e. The remaining amount is compared, and if both approaches or the former exceeds the latter, information indicating that fact is output to the tape drive unit 4e. This processing by the prediction control unit 7e can be performed at any time before recording the unit recording section for each unit recording section. By performing the control immediately after the completion of the control, it is possible to appropriately execute the control.

The tape drive unit 4e which has received the above information from the prediction control unit 7e is displayed on the display unit included therein.
A message to the effect that the remaining tape capacity is insufficient is displayed to the user, and the tape recording medium is ejected. As described above, assuming that the processing by the prediction control unit 7e is performed immediately after the end of the recording process for the immediately preceding unit recording section, there is a CM section after that, so that the user has insufficient tape remaining capacity. Is notified and the start of recording for the unit recording section to be processed has time margin, and if the user changes the tape recording medium promptly, the unit recording section to be processed becomes On the other hand, the recording process is smoothly continued.

Generally, the first part and the last part of the tape recording medium are parts that are liable to be subjected to a load when the tape drive is loaded or wound, and the reproduction is caused by the pain of the tape recording medium. Errors are likely to occur. Therefore, it is customary to not use the first and last portions of a recording medium in commercially available video software and the like.
By performing the above control, in this application example,
The last part of the tape recording medium will not be used, and the CM section will correspond to the first part of the recording process immediately after tape replacement, so the program body will be recorded in such error-prone parts. It is possible not to be performed.

As described above, according to the recording / reproducing apparatus of the fifth embodiment, the receiving section 1e, the memory management section 2e, the large-capacity memory device 3e, the tape drive section 4e, the database section 6e, the prediction control section 7e, An analysis unit 8e is provided to perform input / output management in units of segments in the large-capacity memory device 3d in the same manner as in the first embodiment, so that a tape recording medium can be efficiently used. Database section 6 for detecting a section to be detected and holding a detection result
e, using the information input from the memory management unit 2e, the prediction control unit 7e predicts the data reception status, and according to the prediction, the memory management unit 2e uses the tape recording medium in the tape drive unit 4e. Control the recording to
Since a program is treated as a unit recording section divided by a CM and the processing of the unit recording section is completed during the CM section, it is possible to avoid occurrence of noise in intermittent recording processing in the recording portion of the program body. Become.

Further, according to the recording / reproducing apparatus of the application example of the fifth embodiment, the tape drive section 4e includes a display section and has a function of detecting the remaining amount of tape. The unit 2e performs control corresponding to the remaining amount of tape for each unit recording section of the program, so that the program main body is not recorded in an error-prone portion of the tape recording medium, and a good recording result can be obtained. It becomes possible.

[0101]

According to the recording / reproducing apparatus of the present invention, a large-capacity storage device capable of random access is provided, and data is recorded on a magnetic tape recording medium in accordance with a digital system. In a recording / playback apparatus that plays back recorded data, a digital video signal is generated from data received as a constituent of a certain program,
A receiving unit that obtains information about the program from the data, a fixed amount of a digital video signal generated by the receiving unit, information generated from the information about the program obtained by the receiving unit, and whether or not erasing is possible; A large-capacity storage device management unit that generates segment information including information and controls reading and writing of the generated segment information to and from the large-capacity storage device; A tape drive unit that writes segment information read from the mass storage device by the device management unit and reads data recorded on the magnetic tape recording medium, thereby achieving efficient recording on the magnetic tape recording medium In addition, even when the recording process is interrupted, the reproduction process is not performed using the content stored in the mass storage device. Possible to obtain that.

According to the recording / reproducing apparatus of claim 2, in the apparatus of claim 1, the mass storage device management section generates the segment information as indicating that the erasability information indicates that erasure is impossible. This is written in the mass storage device, the written segment information is read out in a time-series order indicated by information generated from the information on the program in the segment information, and the read-out segment information is output to the tape drive unit. And changing the erasability information in the segment information held in the mass storage device to one indicating erasability, and writing the segment information to the mass storage device, A storage unit for storing segment information indicating that the erasability information is erasable in the storage unit of the device; On the other hand, writing is performed in a time-series order indicated by information generated from information on the program in the segment information, and by performing such control, efficient recording on a magnetic tape recording medium is realized. , Even if the recording process is interrupted,
It is possible to perform a reproduction process using the contents stored in the mass storage device.

According to a third aspect of the present invention, in the device of the first or second aspect, the apparatus further comprises a user interface unit for notifying a user of information relating to the recording / reproduction, and the tape drive unit comprises: It has a tape remaining amount detecting function of detecting the remaining amount of the magnetic tape recording medium, and the mass storage device management unit is configured to perform the operation when the remaining amount of the tape detected by the tape drive unit becomes a predetermined value or less. Does not read the segment information from the mass storage device, but instructs the user interface unit to notify the user of the prompt for tape replacement, thereby efficiently recording on the magnetic tape recording medium. Recording and playback smoothly even when multiple magnetic tape recording media are used for recording. It makes it possible to.

According to a fourth aspect of the present invention, in the device of any one of the first to third aspects, the large-capacity storage device management unit is configured to store the received data based on a state of generation of the segment information. The tape drive unit outputs information indicating a transfer speed, the tape drive unit has a tape remaining amount detection function of detecting a remaining amount of the magnetic tape recording medium, and information on a program acquired by the reception unit. A database unit that holds information indicating the transfer speed of the received data output by the mass storage device management unit, a tape remaining amount detected by the tape drive unit,
A user interface unit for determining whether or not the remaining amount of the tape is sufficient based on the information held by the database unit and notifying a user of a result of the determination. In addition, it is possible to realize efficient recording on a magnetic tape recording medium and to prompt a user to cope when the capacity of the magnetic tape recording medium is insufficient.

According to a fifth aspect of the present invention, in the apparatus of any one of the first to fourth aspects, the mass storage device management unit determines the size of the received data based on the generation state of the segment information. It outputs information indicating the transfer rate, reads out the segment information from the large-capacity storage device in response to information input from the prediction control unit described later, and obtains the information obtained by the receiving unit. A database unit for holding information about a program and information indicating the transfer speed of the received data output by the mass storage device management unit; and a transfer speed of the received data output by the mass storage device management unit Of the reception speed based on the information indicating the reception speed and the information held by the database unit. And a prediction control unit that outputs information indicating the result, which realizes efficient recording on the magnetic tape recording medium, and inconveniences that the recording processing end time is delayed from the reception end time. Can be avoided.

According to a sixth aspect of the present invention, in the device of any one of the first to fifth aspects, the mass storage device management unit determines the size of the received data based on a state of generation of the segment information. It outputs information indicating a transfer rate, reads out the segment information from the mass storage device in response to information input from a prediction control unit described later, and outputs the segment information. By monitoring the information, a specific information detecting unit that detects a portion transmitting a specific type of information in the program, information on the program acquired by the receiving unit, and a result of the detection in the specific information detecting unit. A storage unit for storing the information indicating the transfer speed of the received data output from the mass storage device management unit, and information stored in the database unit. A prediction control unit that predicts a point in time when the specific type of information is transmitted, and outputs information indicating a result of the prediction to the mass storage device management unit. In addition to realizing efficient recording on a magnetic tape recording medium, a problem that may occur due to intermittent recording on a magnetic tape recording medium can be identified by a specific type of information (CM).
Is made possible in the portion where the information is recorded, and good recording can be performed in other portions.

According to a seventh aspect of the present invention, in the device of the sixth aspect, the tape drive unit has a tape remaining amount detecting function of detecting a remaining amount of the magnetic tape recording medium. A display unit that displays a result of the detection and information input from a prediction control unit described later, wherein the prediction control unit determines a result of the tape remaining amount detection in the tape drive unit and the specific Based on the prediction of the time when the type of information is transmitted, it is determined whether the remaining amount of tape is sufficient, and information indicating the result of the determination is output to the tape drive unit, In addition to realizing efficient recording on a magnetic tape recording medium, a problem that may occur due to intermittent recording on a magnetic tape recording medium can be identified by a specific type of information (CM). Strive to obtain occur in recorded portion, for the other parts makes it possible to perform good recording.

According to the recording / reproducing apparatus of claim 8, in the apparatus of claim 6 or 7, the receiving section receives digital data, and the specific information detecting section receives a packet constituting the digital data. The above-mentioned detection is performed based on the information about the time given to the.

According to a ninth aspect of the present invention, in the device of the sixth or seventh aspect, the receiving section receives the analog data and generates a digital video signal by a predetermined process. The detection unit performs the detection based on a change point between the audio multiplex broadcast and the monaural broadcast in the analog data, and performs the detection to obtain the effect described above.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a recording and playback device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a recording / playback apparatus according to Embodiment 2 of the present invention.

FIG. 3 is a block diagram showing a configuration of a recording / playback apparatus according to Embodiment 3 of the present invention.

FIG. 4 is a block diagram showing a configuration of a recording / playback apparatus according to Embodiment 4 of the present invention.

FIG. 5 is a block diagram showing a configuration of a recording / playback apparatus according to Embodiment 5 of the present invention.

FIG. 6 is a diagram for explaining CM section detection in the apparatus of the embodiment.

FIG. 7 is a diagram for explaining recording processing and reproduction processing in a recording / reproducing apparatus according to a conventional technique.

[Explanation of symbols]

1a, 1b, 1c, 1d, 1e Receiving unit 2a, 2b, 2c, 2d, 2e Memory managing unit 3a, 3b, 3c, 3d, 3e Large-capacity memory device 4a, 4b, 4c, 4d, 4e Tape drive unit 5b, 5c User interface unit 6c, 6d, 6e Database unit 7d, 7e Prediction control unit 8e Analysis unit

Claims (9)

[Claims] 1. A recording / reproducing apparatus comprising: a large-capacity storage device capable of random access; recording data on a magnetic tape recording medium according to a digital system; and reproducing data recorded on the magnetic tape recording medium. A receiving unit that generates a digital video signal from data received as a constituent of a certain program, and obtains information on the program from the data; a certain amount of the digital video signal generated by the receiving unit; The receiving unit generates segment information including information generated from the information regarding the program acquired and information indicating whether or not erasing is possible, and controls reading and writing of the generated segment information to and from the mass storage device. A large-capacity storage device management unit; and the large-capacity storage device management unit for the magnetic tape recording medium. A tape drive unit for writing segment information read from the volume storage device and reading data recorded on the magnetic tape recording medium. 2. The recording / reproducing apparatus according to claim 1, wherein the large-capacity storage device management unit generates the segment information as the erasability information indicating that erasure is not possible, and generates the segment information as the large-capacity information. Writing the segment information into the storage device, reading out the written segment information in chronological order indicated by information generated from the information on the program in the segment information, outputting the read segment information to the tape drive unit, The erasability information in the segment information held in the mass storage device is changed to information indicating that erasure is possible. In writing the segment information to the mass storage device, the storage portion of the mass storage device , The erasability information is stored in a storage unit that holds segment information indicating that erasure is possible. Recording and reproducing apparatus, characterized in that information generated from the information on the program in the segment information is intended to be written in order of time series shown. 3. The recording / reproducing apparatus according to claim 1, further comprising: a user interface unit for notifying a user of information relating to recording / reproduction, wherein the tape drive unit includes a user interface unit. The large-capacity storage device management unit has a function of detecting the remaining amount of the tape. A recording / reproducing apparatus for instructing the user interface unit to notify the user of tape replacement without reading segment information from a storage device. 4. The recording / reproducing apparatus according to claim 1, wherein the mass storage device management unit includes information indicating a transfer rate of the received data based on a state of generation of the segment information. The tape drive unit has a tape remaining amount detecting function of detecting a remaining amount of the magnetic tape recording medium, and information on a program acquired by the receiving unit, and the large-capacity storage. A database unit that holds information indicating the transfer speed of the received data output by the device management unit; a tape remaining amount detected by the tape drive unit; and a tape remaining amount based on the information held by the database unit. And a user interface unit for notifying the user of the result of the determination. Video recording and playback apparatus according to symptoms. 5. The recording / reproducing apparatus according to claim 1, wherein the mass storage device management unit includes information indicating a transfer speed of the received data based on a state of generation of the segment information. And reads out the segment information from the large-capacity storage device in accordance with information input from a prediction control unit described later, and information on a program acquired by the reception unit. A database unit that stores information indicating the transfer speed of the received data output from the mass storage device management unit; and information indicating the transfer speed of the received data output from the mass storage device management unit. And a prediction of the reception speed based on the information held by the database unit, and the result of the prediction is indicated to the mass storage device management unit. And a prediction control unit for outputting information. 6. The recording / reproducing apparatus according to claim 1, wherein the mass storage device management unit includes information indicating a transfer rate of the received data based on a generation state of the segment information. And reads out the segment information from the large-capacity storage device in accordance with information input from a prediction control unit described later, and monitors the information output by the reception unit. By doing so, a specific information detecting unit that detects a portion transmitting a specific type of information in the program, information on the program acquired by the receiving unit, and a result of the detection in the specific information detecting unit are stored. A database unit, based on information indicating the transfer speed of the received data output by the mass storage device management unit, and information held by the database unit A prediction control unit that performs prediction on a point in time when the specific type of information is transmitted, and outputs information indicating a result of the prediction to the mass storage device management unit. A recording / playback apparatus characterized by the above-mentioned. 7. The recording and playback device according to claim 6, wherein the tape drive unit has a tape remaining amount detecting function of detecting a remaining amount of the magnetic tape recording medium,
In addition, the apparatus further includes a display unit that displays a result of the detection and information input from a prediction control unit described later. The prediction control unit includes a result of the remaining tape detection in the tape drive unit, Determining whether or not the remaining amount of the tape is sufficient based on the prediction of the time when the specific type of information is transmitted, and outputting information indicating the result of the determination to the tape drive unit A recording / reproducing apparatus, characterized in that: 8. The recording / reproducing apparatus according to claim 6, wherein the receiving unit receives digital data, and the specific information detecting unit is configured to receive a time assigned to a packet constituting the digital data. A recording / reproducing apparatus for performing the above-mentioned detection on the basis of information on the recording / reproducing apparatus. 9. The recording / reproducing apparatus according to claim 6, wherein the receiving unit receives the analog data and generates a digital video signal by a predetermined process. A recording / reproducing apparatus for performing the above-described detection based on a change point between audio multiplex broadcasting and monaural broadcasting in analog data.