JP4041006B2 - Data recording / reproducing apparatus and control method of data recording / reproducing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data recording / reproducing apparatus that can reproduce data while recording it, and a control method for the data recording / reproducing apparatus.
[0002]
[Prior art]
In recent years, DVD recorders that use DVD (Digital Versatile Disk), which is an optical disk, as a recording medium have become widespread as consumer recording / playback apparatuses for recording TV broadcast programs. The DVD recorder includes an MPEG (Moving Picture Experts Group) encoder, an MPEG decoder, and an AV decoder. A DVD recorder encodes a television broadcast video signal and audio signal transmitted as analog signals into MPEG digital data, and records the encoded data on a DVD. Digital data recorded on a DVD is decoded into analog video signals and audio signals by an MPEG decoder and an AV decoder, and a recorded program can be viewed by displaying the video signals and audio signals on a monitor such as a television. it can.
[0003]
Data encoding by the MPEG method has a high compression rate and little image deterioration, and is therefore suitable for efficiently compressing an image with a large amount of information and recording a television broadcast program on a DVD for a long time.
[0004]
Further, while a conventional video cassette recorder such as the VHS system is not suitable for randomly accessing a program recorded on a video tape, a DVD recorder using a DVD as a disk-type recording medium is recorded. It is suitable for randomly accessing image data such as programs.
[0005]
In particular, a DVD recorder that uses a DVD-RAM employs a recording method suitable for random access. For this reason, by appropriately selecting the transfer speed of the recording and reproduction data, while recording the broadcast program on the DVD, “chase reproduction” for reproducing the already recorded part of the broadcast program, or broadcasting to the DVD While recording a program, it is possible to perform “simultaneous recording / playback” in which another broadcast program that has already been recorded is played back.
[0006]
On the other hand, television broadcasting is increasingly being switched from using analog signals to using digital signals. Particularly in recent years, satellite digital broadcasting using broadcasting satellites (BS) and communication satellites (CS) has been started, and televisions that support digital broadcasting have become widespread.
[0007]
In satellite digital broadcasting, broadcasting based on a high definition (HD) system, which has higher image quality than current terrestrial television broadcasting, is mainly used. In the case of BS satellite digital broadcasting, the maximum data transfer rate per service is 26 Mbps, and in the case of CS satellite digital broadcasting, broadcasting at a higher transfer rate is possible.
[0008]
In the case of such satellite digital broadcasting using the HD system, even if an attempt is made to record a program on a DVD recorder, the data transfer rate exceeds 10.08 Mbps, which is the maximum transfer rate that can be recorded on a DVD.
[0009]
For this reason, a Blu-ray Disc (hereinafter abbreviated as BD) has been developed and standardized as an optical disc capable of recording satellite digital broadcast programs in HD format. According to the BD standard, data is recorded using a blue laser with a wavelength of 405 nm, and the maximum data transfer rate is 36 Mbps. Therefore, the BD recorder using the BD can record the HD program by satellite digital broadcasting as it is.
[0010]
[Patent Document 1]
JP 2000-322830 A
[0011]
[Problems to be solved by the invention]
However, in the BD standard that has been established, the maximum value of the maximum data transfer rate for recording and playback is 36 Mbps, and recorded programs can be played back from the BD while recording satellite digital broadcast HD programs on the BD. If so, the data transmission rate will exceed this maximum value. For this reason, the above-described BD recorder cannot perform simultaneous recording and playback or follow-up playback of satellite digital broadcast HD programs.
[0012]
Patent Document 1 discloses a technique for realizing recording and reproduction without reducing the performance of the recording / reproducing means when input / output occurs simultaneously in digital television broadcasting as a problem related to such a problem. However, the technique disclosed in Patent Document 1 focuses on programs broadcast at a data transfer rate of about 6 Mbps, and simultaneously records and reproduces broadcast programs with much higher transfer rates such as HD programs. I do not consider that. Further, the technique disclosed in Patent Document 1 mainly uses a magnetic disk as a recording medium, and does not consider recording data on the optical disk.
[0013]
Even when the above-described DVD recorder is used, if a broadcast program is to be recorded with higher image quality, the data transfer rate at the time of recording may exceed 5 Mbps. In this case, it is impossible to reproduce the program while recording the program with such high image quality.
[0014]
The object of the present invention is to solve such a problem and to reproduce a broadcast program that needs to be recorded at a high transfer rate, such as an HD program. Parallel An object of the present invention is to provide a data recording / reproducing apparatus and a method for controlling the data recording / reproducing apparatus that can be performed in this manner.
[0015]
[Means for Solving the Problems]
The data recording / reproducing apparatus of the present invention includes a first data recording / reproducing unit capable of recording data on a recording medium and reproducing the data recorded on the recording medium, and the first data. Whether the total value of the transfer rate of the recording data to be recorded in the recording / reproducing unit and the transfer rate of the reproduced data read from the first data recording / reproducing unit is larger than the maximum data transfer rate of the first data recording / reproducing unit. When the transfer rate evaluation unit to be evaluated and the total value is smaller than the maximum data transfer rate of the first data recording / reproducing unit, recording and reproduction to the first data recording / reproducing unit are performed simultaneously. The first data recording / reproducing unit is controlled, and when the total value exceeds the maximum data transfer rate of the first data recording / reproducing unit, the first data recording / reproducing unit is used. The first data recording / reproducing unit and the second data recording / reproducing unit perform the recording operation by stopping the recording operation of the reproducing unit and performing only the reproducing operation, and inputting the recording data to the second data recording / reproducing unit. The data recording / reproducing unit is controlled, and after the total value becomes smaller than the maximum data transfer rate of the first data recording / reproducing unit, the data recorded in the second data recording / reproducing unit is To record to the first recording / playback unit The first data recording / reproducing unit And a recording / reproducing control unit for controlling the second data recording / reproducing unit.
[0016]
In a preferred embodiment, the first data recording / reproducing unit is an optical disk drive.
[0017]
In a preferred embodiment, the second data recording / reproducing unit is a hard disk drive.
[0018]
In a preferred embodiment, the transfer rate evaluating unit temporarily stores a recording buffer for temporarily storing recording data to be recorded in the first data recording / reproducing unit, and reproduction data read from the first data recording / reproducing unit. A first buffer unit including a reproduction buffer for accumulating data, and a buffer control unit for evaluating the storage data amount or empty capacity of the recording buffer and the reproduction buffer of the first buffer unit.
[0019]
In a preferred embodiment, the recording data is a high-definition broadcast signal.
[0020]
In a preferred embodiment, the data recording / reproducing apparatus includes a digital tuner that selects a digital broadcast signal, a transport decoder that extracts an MPEG transport stream of a desired service from the selected signal, and an MPEG transport stream. And the data recorded and reproduced in the first data recording / reproducing unit or the second data recording / reproducing unit is an MPEG transport stream.
[0021]
Also, the control method of the data recording / reproducing apparatus of the present invention includes first and second data recording / reproducing units capable of recording data on a recording medium and reproducing the data recorded on the recording medium, respectively. A method for controlling a data recording / reproducing apparatus, wherein a total value of a transfer rate of recording data to be recorded in the first data recording / reproducing unit and a transfer rate of reproduction data to be read out from the first data recording / reproducing unit is: In the step (A) for evaluating whether or not it is larger than the maximum data transfer rate of the first data recording / reproducing unit, and in the step (A), when the total value is smaller than the maximum data transfer rate, the first In the step (B) of controlling the first data recording / reproducing unit so that recording and reproduction are simultaneously performed on the data recording / reproducing unit, and in the step (A), When the total value exceeds the maximum data transfer rate of the first data recording / reproducing unit, the recording operation of the first data recording / reproducing unit is stopped and only the reproducing operation is performed, and the second The recording data is input to a data recording / reproducing unit, and the first data recording / reproducing unit and the second data recording / reproducing unit are controlled to perform a recording operation, and the total value is the first data recording / reproducing unit. The data recorded in the second data recording / reproducing unit is recorded in the first recording / reproducing unit after becoming smaller than the maximum data transfer rate of the reproducing unit. The first data recording / reproducing unit And (C) controlling the second data recording / reproducing unit.
[0022]
In a preferred embodiment, the first data recording / reproducing unit is an optical disk drive.
[0023]
In a preferred embodiment, the second data recording / reproducing unit is a hard disk drive.
[0024]
In a preferred embodiment, the step (A) includes: a recording buffer for temporarily storing recording data to be recorded in the first data recording / reproducing unit; and reproduction data read from the first data recording / reproducing unit. The amount of stored data or the free capacity of the regenerative buffer to be stored is evaluated.
[0025]
In a preferred embodiment, the recording data is a high-definition broadcast signal.
[0026]
The computer-readable recording medium of the present invention records a program for causing a computer to execute each step of any one of the above control methods.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
[0028]
FIG. 1 is a block diagram showing the configuration of an embodiment of a data recording / reproducing apparatus according to the present invention. As shown in FIG. 1, the data recording / reproducing apparatus 50 includes an optical disk drive 1 as a first data recording / reproducing unit and a hard disk drive (hereinafter abbreviated as HDD) 2 as a second data recording / reproducing unit. In the present embodiment, the optical disc drive 1 is a BD drive that uses a BD as a recording medium and can record and reproduce data on the BD. This BD drive has a maximum transfer rate of 36 Mbps at 1 × speed which is a standard rotation speed. In the present embodiment, the HDD 2 is a hard disk drive (hereinafter abbreviated as HDD) that uses a magnetic disk as a recording medium and can record and reproduce data on the magnetic disk. The maximum transfer rate of the HDD 2 is, for example, 100 Mbps.
[0029]
In the optical disc drive 1, when the total value of the transfer rate of the recording data to be recorded on the BD and the transfer date of the reproduction data read from the BD is equal to or less than the above-mentioned maximum transfer rate, the optical disc drive 1 performs the recording operation on the BD and the BD. It is possible to simultaneously reproduce the data recorded on the. Here, “simultaneous” does not mean that playback can be performed from the BD at the moment when recording is performed on the BD, and recording and playback are switched in a predetermined period, and recording is performed in the entire predetermined period. This means that recording and reproduction are performed while satisfying the data transfer rate and the reproduction data transfer rate. For this reason, the actual writing speed to the BD and the actual reading speed from the BD are higher than the transfer rate of the recording data and the transfer date of the reproduction data.
[0030]
Also in the HDD 2, when the total value of the transfer rate of the recording data to be recorded on the magnetic disk and the transfer date of the reproduction data read from the magnetic disk is equal to or less than the above-mentioned maximum transfer rate, the HDD 2 performs the recording operation on the magnetic disk and the magnetic Data recorded on the disc can be reproduced simultaneously.
[0031]
Here, “simultaneous” has the same meaning as “simultaneous” in the optical disc drive 1. In addition, since “chasing playback” and “simultaneous recording / playback” are only the difference between playback of another recorded program or recorded part of the program being recorded, “Simultaneous recording / playback” will be described including the case of “playback”.
[0032]
The optical disk drive 1 is connected to an optical disk recording / playback control section 6 via an optical disk buffer memory 3 that is a first buffer section. The second recording / reproducing unit 2 is connected to the HDD recording / reproducing control unit 7 via an HDD buffer memory 5 serving as a second buffer unit.
[0033]
The optical disk buffer memory 3 includes a recording buffer and a reproduction buffer, and data exchange between the optical disk recording / reproduction control unit 6 and the first recording / reproduction unit 1 is performed via the optical disk buffer memory 3. Specifically, the recording data recorded from the optical disc recording / playback control unit 6 to the first recording / playback unit 1 is temporarily stored in the recording buffer. Further, the reproduction data read from the first recording / reproducing unit 1 to the optical disc recording / reproducing control unit 6 is temporarily stored in the reproduction buffer. Similarly, the HDD buffer memory 5 includes a recording buffer and a reproduction buffer, and data is transferred between the HDD recording / reproducing unit 7 and the second recording / reproducing unit 2 via the HDD buffer memory 5.
[0034]
The buffer control unit 4 monitors the amount of data stored in the recording buffer and the reproduction buffer of the optical disk buffer memory 3 or the free capacity of each buffer. The optical disk buffer memory 3 and the buffer control unit 4 function as a transfer rate evaluation unit 21 and monitor the amount of data stored in the recording buffer and the reproduction buffer or the free capacity of each buffer, thereby allowing the optical disk drive 1 It is possible to evaluate the total value of the transfer rate of the recording data to be recorded on and the transfer rate of the reproduction data read from the optical disc drive 1. In other words, when the amount of accumulated data is greater than or equal to a predetermined value or the free space is less than or equal to a predetermined value, the transfer rate of recording data to be recorded on the optical disk drive 1 and the optical disk drive 1 are read. It is evaluated that the total transfer data transfer rate exceeds the maximum transfer rate of the optical disc drive 1.
[0035]
The optical disc recording / reproduction control unit 6 and the HDD recording / reproduction control unit 7 respectively control recording / reproduction of the optical drive 1 and recording / reproduction of the HDD 2. The data recording / reproducing apparatus 50 includes a CPU 8 and controls the optical disc recording / reproducing control unit 6, the HDD recording / reproducing control unit 7, and the buffer control unit 4.
[0036]
As shown in FIG. 1, the data recording / reproducing apparatus 50 further includes a digital tuner 11 and a transport decoder 12 for receiving satellite digital broadcasting. A satellite digital broadcast signal by CS or BS is received by the antenna 10, and the received signal is input to the digital tuner 11. The digital tuner 11 selects a channel having a desired frequency from a plurality of channels transmitted from the CS or BS. A signal of the selected channel is input to the transport decoder 12. Since satellite digital broadcasting includes a plurality of services such as image broadcasting and data broadcasting in one channel, the transport decoder 12 selectively extracts a desired service from the plurality of services.
[0037]
The transport decoder 12 outputs an MPEG2 transport stream (abbreviated as MPEG_TS) of the selected service. MPEG_TS is a data string obtained by encoding other additional information such as video, audio, and electronic program guide (EPG) by the MPEG2 system.
[0038]
The data recording / reproducing apparatus 50 includes a switch 9 controlled by the CPU 8. MPEG_TS output from the coder 12 by the transport is input to the optical disc recording / reproduction control unit 6 and HDD recording / reproduction control unit 7 as recording data. By selecting the switch 9, the HDD recording / reproducing control unit 7 and the optical disk recording / reproducing control unit 6 can be connected to record the data recorded on the HDD 2 to the optical disc drive 1. The switch 9, the CUP 8, the optical disc recording / playback control unit 6 and the HDD recording / playback control unit 7 constitute a recording / playback control unit 22.
[0039]
As will be described in detail below, the transfer rate evaluation unit 21 determines the maximum data of the optical disc drive 1 as the sum of the transfer rate of recording data (MPEG_TS) to be recorded on the optical disc drive 1 and the transfer rate of reproduction data read from the optical disc drive 1. When evaluating that the transfer rate is exceeded, the recording / reproducing control unit performs the recording operation by stopping the recording operation of the optical disc drive 1 and performing only the reproducing operation and inputting the recording data (MPEG_TS) to the HDD 2. 22 controls the optical disc drive 1 and the HDD 2. Thereafter, the transfer rate evaluation unit 21 determines that the total of the transfer rate of recording data (MPEG_TS) to be recorded on the optical disc drive 1 and the transfer rate of reproduction data read from the optical disc drive 1 is smaller than the maximum data transfer rate of the optical disc drive 1. When evaluated, the recording / playback control unit 22 controls the optical disc drive 1 and the HDD 2 so that the recording data (MPEG_TS) recorded on the HDD 2 is recorded on the optical disc drive 1.
[0040]
When MPEG_TS is recorded on the optical disc drive 1 and the HDD 2, various additional information (title of program to be recorded, channel number, recording time, recording signal) created by the optical disc recording / playback control unit 6 and HDD recording / playback control unit 7 are recorded. Rate, program number for managing recording data in the recording medium, directory number, etc.) are also recorded. MPEG_TS adopts a packet transmission method, and has a data string structure in which TS packets with packet IDs are arranged on a time axis. The recording / reproducing control unit 22 can detect the packet ID and control recording to the optical disc drive 1 and HDD 2 and reproduction from the optical disc drive 1 and HDD 2 in units of TS packets.
[0041]
The data recording / reproducing apparatus 50 further includes an MPEG decoder 13 and an AV decoder, and the MPEG_TS recorded on the optical disc drive 1 is decoded by the MPEG decoder 13. The AV decoder 14 converts the decoded signal into an NTSC analog video signal, and is connected to an external monitor, television, or the like via the terminal 15.
[0042]
Next, the operation of the data recording / reproducing apparatus 50 will be described with reference to FIG. 1, FIG. 2, and FIG. FIG. 2 is a flowchart for explaining the operation of the data recording / reproducing apparatus 50, and FIG. 3 schematically shows MPEG_TS output from the transport decoder 12 and MPEG_TS TS packets recorded in the optical disc drive 1 and HDD 2. ing.
[0043]
A program and firmware for causing the CPU 8 to control each part of the data recording / reproducing apparatus 50 in the following procedure are recorded on a computer-readable recording medium such as an EEPROM, ROM, RAM, hard disk, or magnetic recording medium (not shown). Saved.
[0044]
First, the antenna 10 receives radio waves from a BS or CS satellite, and the digital tuner 11 selects a desired channel frequency. The signal of the channel selected by the digital tuner 11 is decoded by the transport decoder 12, a desired service is selected from a plurality of services included in the selected channel, and the MPEG_TS of the selected service is the transport decoder. 12 is output.
[0045]
During normal recording, the switch 9 of the recording / playback control unit 22 connects the transport decoder 12 and the optical disk recording / playback control unit 6 so that the MPEG_TS output from the transport decoder 12 is input to the optical disk recording / playback control unit 6. Connecting. The CPU 8 of the recording / reproducing control unit 22 controls the optical disc recording / reproducing control unit 6 to record data from the data of the desired packet ID of MPEG_TS, and records data on the optical disc drive 1. At this time, the recording data is temporarily stored in the recording buffer of the optical disk buffer memory 3 so that even if a recording error occurs in the optical disk drive 1, the recording data is not lost.
[0046]
The buffer control unit 4 constantly monitors the storage capacity and free capacity of the optical disk buffer memory 3. In the case of BS digital HD broadcasting, the data transfer rate of one service is a maximum of 26 Mbps, and the data transfer rate of the optical disc drive 1 is 36 Mbps. Since the data transfer rate of the optical disc drive 1 is larger than the data transfer rate of one service, the amount of data read is usually larger than the amount of data stored in the recording buffer of the optical disc buffer memory 3, and the free space of the recording buffer is large. It won't happen. These operations correspond to the state where recording and reproduction are not performed at the same time in step ST31 of the flowchart shown in FIG.
[0047]
An operation of starting data reproduction from the optical disc drive 1 by a user operation or the like while the BS digital HD broadcast program is being recorded on the optical disc drive 1 will be described below. In the flowchart shown in FIG. 2, in step ST31, the process proceeds to step ST32 in order to perform recording and reproduction at the same time.
[0048]
First, the CPU 8 controls the optical disc recording / reproduction control unit 6 so that data is reproduced from the optical disc drive 1. Assume that an HD broadcast program is recorded at a transfer rate of 26 Mbps. At this time, if the data to be reproduced is broadcast in a standard format (abbreviated as Standard Definition, SD) and the data transfer rate is about 8 Mbps, the total of the transfer rate of the recording data and the transfer rate of the reproduction data is The value is 34 Mbps, which is equal to or less than 36 Mbps, which is the maximum transfer rate of the optical disc drive 1, so that data recorded on the optical disc drive 1 can be reproduced simultaneously while continuing recording on the optical disc drive 1. At this time, the sum of the free capacity of the recording buffer and the free capacity of the reproduction buffer in the optical disk buffer memory 3 does not decrease below a predetermined value. Therefore, the buffer control unit 4 determines that the total value of the transfer rate of the recording data and the transfer rate of the reproduction data does not exceed the maximum transfer rate of the optical disc drive (step ST32), and performs simultaneous recording on the optical disc drive 1 Reproduction is performed (step ST36).
[0049]
However, when the data reproduced from the optical disc drive 1 is an HD program, for example, when the data transfer rate is 22 Mbps, the total value of the transfer rate of the recording data and the transfer rate of the reproduction data is 48 Mbps. The maximum transfer rate of 36 Mbps is exceeded.
[0050]
In this case, the free capacity of the recording buffer and the free capacity of the reproduction buffer in the optical disk buffer memory 3 are reduced. That is, the buffer control unit 4 detects that the sum of these values has become a predetermined value or less, and the total value of the recording data transfer rate and the reproduction data transfer rate exceeds the maximum transfer rate of the optical disc drive. Judge that For example, if the optical disk buffer memory 3 is equipped with a 4 MB buffer memory, it is determined that the transfer rate is over when the sum value is 1 MB or less (step ST32).
[0051]
This transfer rate over information is transmitted to the CPU 8, and the CPU 8 controls the HDD recording / reproducing control unit 7 to start recording the TS signal output from the transport decoder 12 to the HDD 2 and simultaneously controls the optical disc recording / reproducing control unit 6. Then, recording to the optical disc drive 1 is stopped (step ST33). At this time, the packet ID of the TS packet that starts recording on the HDD 2 and the packet ID of the TS packet that stops recording on the optical disk drive 1 are controlled by the CPU 8 so that the recording data is not lost.
[0052]
As shown in FIG. 3, for example, the transport decoder 12 outputs TS packets with packet IDs indicated by ID1, ID2, ID3, ID4, and ID5, and recording from the ID4 TS packet to the HDD 2 is started. In this case, after the ID3 packet is completely recorded on the optical disk drive 1, the recording operation of the optical disk drive 1 is stopped. Then, the ID3 of the final TS packet recorded in the optical disk drive 1 and the ID4 of the TS packet started to be recorded in the HDD 2 are stored in the internal memory of the CPU 8. Further, the addresses on the optical disk of the optical disk drive 1 and the drive of the HDD 2 in which those TS packets are recorded are also stored in the internal memory of the CPU 8. In this way, when the total value of the transfer rate of the recording data to be recorded to the optical disc drive 1 and the transfer rate of the reproduction data read from the optical disc drive 1 exceeds the maximum transfer rate of the optical disc drive, digital HD broadcast The optical disk drive 1 can be reproduced by performing recording on the HDD 2.
[0053]
MPEG_TS reproduction data reproduced from the optical disk drive 1 is input to the MPEG decoder 13 from the optical disk recording / reproduction control unit 6 and decoded. Further, it is converted into an NTSC analog video signal by the AV decoder 14 and output from the analog output terminal 15.
[0054]
In this state, the buffer control unit 4 continues to monitor the storage capacity of the recording buffer and the reproduction buffer of the optical disk buffer memory 3. Since recording on the optical disk drive 1 is stopped, the storage capacity of the recording buffer of the optical disk buffer memory 3 is zero. At this time, if recording to the optical disc drive 1 is started again, it is clear that the total value of the transfer rate of the recording data and the transfer rate of the reproduction data read from the optical disc drive 1 exceeds the maximum transfer rate of the optical disc drive. For this reason, the buffer control unit 4 determines that the reproduction operation of the optical disk drive 1 continues while data is accumulated in the reproduction buffer of the optical disk buffer memory 3, and until the accumulation capacity of the reproduction buffer becomes zero. Then, it is determined that the total value of the transfer rate of the recording data and the transfer rate of the reproduction data read from the optical disc drive 1 exceeds the maximum transfer rate of the optical disc drive (step ST34).
[0055]
Next, an operation when reproduction of the optical disc drive 1 is stopped by a user operation or the like will be described. First, the optical disk recording / reproducing control unit 6 is controlled so that the CPU 8 stops reading data from the optical disk drive 1.
[0056]
Since the reproduction of the optical disk drive 1 is stopped, the transfer rate over of the optical disk drive 1 does not occur even when recording is started again on the optical disk drive 1. At this time, since the recording operation of the optical disk drive 1 remains stopped, the free capacity of the recording buffer of the optical disk buffer memory 3 is maximized. Further, when the reproduction operation of the optical disk drive 1 is stopped, the storage capacity of the reproduction buffer of the optical disk buffer memory 3 becomes zero, and the free capacity of the reproduction buffer becomes maximum. That is, the storage capacity of the reproduction buffer is zero, and the free capacity of the recording buffer and storage buffer is equal to or greater than a predetermined value. The buffer control unit 4 detects this state and determines that the total value of the recording data transfer rate and the reproduction data transfer rate is smaller than the maximum data transfer rate of the optical disc drive 1.
[0057]
After receiving this information from the buffer control unit 4, the CPU 8 controls the switch 9, the optical disc recording / reproduction control unit 6 and the HDD recording / reproduction control unit 7 to record the data recorded in the HDD 2 on the optical disc drive 1 ( Step ST35).
[0058]
Specifically, as shown in FIG. 3, the CPU 8 controls the HDD recording / reproduction control unit 7 to start the reproduction of the HDD 2 from the address where the ID4 TS packet is recorded based on the information in the internal memory. At the same time, the optical disc recording / reproducing control unit 6 is controlled so as to start recording the reproduced TS packets after ID 4 in the optical disc drive 1. At this time, in the optical disc drive 1, the address where the TS packet of ID3 is recorded so that the TS packet up to ID3 already recorded in the optical disc drive 1 and the TS packet after ID4 newly recorded becomes a continuous MPEG_TS. The recording operation is performed referring to. Then, when the reading and recording of a desired TS packet from the HDD 2 to the optical disk drive 1 is completed, the data recording to the optical disk drive 1 is stopped and the data reproduction from the HDD 2 is stopped so that the data reproduction from the HDD 2 is stopped. The HDD recording / reproducing control unit 7 is controlled by the CPU 8.
[0059]
When the TS packet is read from the HDD 2 and the TS packet read to the optical disc drive 1 is recorded, it is not necessary to delete the TS packet recorded on the HDD 2, and the data of the TS packet is dubbed from the HDD 2 to the optical disc drive 1. do it. However, when the TS packet data recorded on the HDD 2 is unnecessary after the recording to the optical disc drive 1 is completed, the TS packet data was recorded on the HDD 2 simultaneously with the above operation or after the end of the above operation. The TS packet data may be erased or overwritten.
[0060]
As described above, according to the data recording / reproducing apparatus of the present invention, the recording of the digital HD broadcast program performed on the optical disk drive 1 is performed in the middle of the HDD 2 and the other recorded on the optical disk drive 1 is performed. Digital HD broadcast programs can be played back. For this reason, it becomes possible to show the user as if the digital HD broadcast was simultaneously recorded and reproduced on the optical disc drive 1.
[0061]
Further, when reading data from the HDD 2 and recording the read data to the optical disk drive 1, the HDD 2 has a maximum transfer rate of 100 Mbps, so that the data output from the transport decoder 12 is recorded on the HDD 2 while being recorded on the HDD 2. It is also possible to reproduce the recorded data. For this reason, when the reproduction operation of the optical disc drive 1 ends earlier than the recording operation of the HDD 2, the data recorded on the HDD 2 is stored while the recording operation to the HDD 2 is continued after the reproduction operation of the optical disc drive 1 is completed. It can be read and recorded on the optical disc drive 1. Thereby, recording of desired data to the optical disc drive 1 can be completed more quickly. However, after the data output from the transport decoder 12 is recorded on the HDD 2, the data may be read from the HDD 2 and the read data may be recorded on the optical disc drive 1.
[0062]
Further, when the data recorded in the HDD 2 is read and the data read out to the optical disk drive is recorded, the maximum value of the data transfer rate between the HDD 2 and the optical disk drive 1, that is, the maximum transfer rate of the optical disk drive 1 in this embodiment. If the data recorded in the HDD 2 at 36 Mbps is read out and recorded in the optical disc drive 1, the recording in the optical disc drive 1 can be completed in a shorter time. For example, when a 24 Mbps digital HD broadcast program is read from the HDD 2 and recorded on the optical disc drive 1, if the program is read and recorded at a data rate of 36 Mbps, the original digital HD broadcast is recorded at a real time data rate of 24 Mbps. Compared with the recording, the recording to the optical disc drive 1 can be completed in about 2/3 of the time.
[0063]
In the present embodiment, the case where data recorded on the optical disk drive 1 is reproduced during recording on the optical disk drive 1 has been described. However, the data recording / reproducing apparatus 50 of the present invention is an optical disk drive 1. It is also possible to perform recording on the optical disk drive 1 during the reproduction of the data recorded on the disk. In this case, when the total value of the transfer rate of the reproduction data and the transfer rate of the recording data is smaller than the maximum transfer rate of the optical disc drive 1, recording and reproduction can be performed simultaneously as described above. When the total value is larger than the maximum transfer rate of the optical disc drive 1, recording that starts in the middle of reproduction is performed on the HDD 2 from the beginning. Then, after the reproduction operation of the optical disk drive 1 is completed, the data recorded in the HDD 2 is read and recorded in the optical disk drive 1.
[0064]
In this embodiment, the transfer rate of recording and reproduction of the optical disk drive 1 is evaluated based on the free capacity of the optical disk buffer memory 3, but the recording and recording of the optical disk drive 1 are evaluated based on the storage capacity of the optical disk buffer memory 3. The transfer rate of playback may be evaluated. Alternatively, the transfer rate of recording and reproduction may be evaluated based on the information of the MPEG_TS packet.
[0065]
In the present embodiment, a BD disk drive is illustrated as the optical disk drive 1, but the optical disk drive 1 may be a DVD drive. In the case of using a DVD drive, while recording a broadcast program with high data quality at a data transfer rate of 5 Mbps or higher, another program of a data transfer rate of 5 Mbps or higher recorded on a DVD or a broadcast program already recorded is recorded. It is possible to play the first part at the same time.
[0066]
【The invention's effect】
According to the data recording / reproducing apparatus of the present invention, a broadcast program that needs to be recorded at a high transfer rate, such as an HD program, can be recorded and reproduced. Parallel Can be done.
[0067]
【The invention's effect】
[Brief description of the drawings]
FIG. 1 is a block diagram showing the structure of an embodiment of a data recording / reproducing apparatus according to the present invention.
FIG. 2 is a flowchart for explaining the operation of the data recording / reproducing apparatus shown in FIG.
3 is a diagram schematically illustrating TS packets recorded on an optical disk drive and a hard disk drive of the data recording / reproducing apparatus shown in FIG. 1. FIG.
[Explanation of symbols]
1 Optical disk drive
2 Hard disk drive (HDD)
3 Optical disk buffer memory
4 Buffer control unit
5 HDD buffer memory
6 Optical disk recording / playback controller
7 HDD recording / playback controller
8 CPU
9 switch
10 Antenna
11 Digital tuner
12 Transport decoder
13 MPEG decoder
14 AV decoder
15 Analog output terminal
21 Transfer rate evaluation section
22 Recording / playback controller

Claims (12)

First and second data recording / reproducing units capable of recording data on a recording medium and reproducing the data recorded on the recording medium,
The maximum data transfer rate of the first data recording / reproducing unit is the sum of the transfer rate of recording data to be recorded to the first data recording / reproducing unit and the transfer rate of reproduction data read from the first data recording / reproducing unit. A transfer rate evaluator that evaluates whether it is greater than,
When the total value is smaller than the maximum data transfer rate of the first data recording / reproducing unit, the first data recording / reproducing unit is configured to simultaneously perform recording and reproduction to the first data recording / reproducing unit. When the total value exceeds the maximum data transfer rate of the first data recording / reproducing unit, the recording operation of the first data recording / reproducing unit is stopped and only the reproducing operation is performed, In addition, the recording data is input to the second data recording / reproducing unit, the first data recording / reproducing unit and the second data recording / reproducing unit are controlled to perform a recording operation, and the total value is after smaller than the maximum data transfer rate of the first of the data recording and reproducing unit, said first data to record the data recorded to the second data recording unit to the first recording and reproducing unit Record Raw block and the recording reproduction control unit for controlling the second data recording unit,
A data recording / reproducing apparatus comprising:   The data recording / reproducing apparatus according to claim 1, wherein the first data recording / reproducing unit is an optical disk drive.   The data recording / reproducing apparatus according to claim 1, wherein the second data recording / reproducing unit is a hard disk drive.   The transfer rate evaluation unit includes a recording buffer for temporarily storing recording data to be recorded in the first data recording / reproducing unit, and a reproduction buffer for temporarily storing reproduction data read from the first data recording / reproducing unit. 4. The data recording according to claim 1, further comprising: a first buffer unit including a buffer control unit that evaluates an accumulated data amount or an empty capacity of the recording buffer and the reproduction buffer of the first buffer unit. Playback device.   5. The data recording / reproducing apparatus according to claim 1, wherein the recording data is a high-definition broadcast signal.   A digital tuner for selecting a digital broadcast signal; a transport decoder for extracting an MPEG transport stream of a desired service from the selected signal; and an MPEG decoder for decoding the MPEG transport stream, 5. The data recording / reproducing apparatus according to claim 1, wherein the data recorded and reproduced in one data recording / reproducing unit or the second data recording / reproducing unit is an MPEG transport stream. A method for controlling a data recording / reproducing apparatus including first and second data recording / reproducing units capable of recording data on a recording medium and reproducing the data recorded on the recording medium,
The total value of the transfer rate of recording data to be recorded to the first data recording / reproducing unit and the transfer rate of reproduction data to be read from the first data recording / reproducing unit is the maximum data of the first data recording / reproducing unit. (A) evaluating whether it is greater than the transfer rate;
In the step (A), when the total value is smaller than the maximum data transfer rate, the step of controlling the first data recording / reproducing unit so that recording and reproduction are simultaneously performed on the first data recording / reproducing unit. (B) and
In the step (A), when the total value exceeds the maximum data transfer rate of the first data recording / reproducing unit, the recording operation of the first data recording / reproducing unit is stopped and only the reproducing operation is performed. And the recording data is input to the second data recording / reproducing unit, the first data recording / reproducing unit and the second data recording / reproducing unit are controlled to perform a recording operation, and the total value after There becomes smaller than the maximum data transfer rate of the first of the data recording and reproducing unit, the first to record the data recorded to the second data recording unit to the first recording and reproducing unit (C) controlling the data recording / reproducing unit and the second data recording / reproducing unit,
A method for controlling a data recording / reproducing apparatus including:   8. The method of controlling a data recording / reproducing apparatus according to claim 7, wherein the first data recording / reproducing unit is an optical disk drive.   The method of controlling a data recording / reproducing apparatus according to claim 7 or 8, wherein the second data recording / reproducing unit is a hard disk drive.   The step (A) includes a recording buffer for temporarily accumulating recording data to be recorded in the first data recording / reproducing unit, and a reproducing buffer for temporarily accumulating reproduction data read from the first data recording / reproducing unit. The method for controlling a data recording / reproducing apparatus according to claim 7, wherein the accumulated data amount or the empty capacity is evaluated.   The method of controlling a data recording / reproducing apparatus according to claim 7, wherein the recording data is a high-definition broadcast signal.   A computer-readable recording medium on which a program for causing a computer to execute each step described in the method for controlling a data recording / reproducing apparatus according to claim 7 is recorded.

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