JP4636720B2 - Digital recording / reproducing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital recording / reproducing apparatus using a detachable recording medium such as a hard disk and a magneto-optical disk, and more specifically, an apparatus capable of easily copying contents recorded on a hard disk to a magneto-optical disk. About.
[0002]
[Prior art]
Conventionally, a digital recording / reproducing apparatus using a randomly accessible recording medium such as a magneto-optical recording medium or a hard disk has been proposed as a recording / reproducing apparatus for data such as a television signal. Among these digital recording / reproducing apparatuses, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-138318, one recording channel and one reproducing channel are provided to perform recording operation on a recording medium. There has been proposed one having a function of reproducing recorded data while executing.
[0003]
Due to the increase in capacity of recording media and the advancement of compression technology such as video data, a huge number of files are generated on the recording media of digital recording and reproducing devices capable of recording a large number of television programs. Easy to guess.
When managing a huge number of titles generated in this way and performing processing such as search, unique and unified information is required. In addition, when displaying information of these titles, it is necessary for the user to be easily understandable.
[0004]
For example, when starting recording or making a reservation, information can be recorded so that the user can easily understand the contents of the title by inputting information such as a program name. Each time an input is required, the user is troublesome.
For this reason, the applicant of the present application can obtain information for managing titles in 1999 patent application No. 349101 (filing date: December 8, 1999) without increasing the time and effort of the user. We proposed a digital recording / playback device that can easily manage titles by recording the title information together with the title and displaying it to the user when necessary.
[0005]
[Problems to be solved by the invention]
By the way, in a digital recording / reproducing apparatus capable of handling a hard disk and a magneto-optical disk, it is also desired to organize and classify titles recorded on the hard disk and store them on the magneto-optical disk. Up to now, regarding the creation of such a so-called library, a user displays a list of titles recorded on a hard disk on a television monitor or the like, selects a necessary one from the list, and copies it to a magneto-optical disk. The operation was generally performed.
[0006]
However, if you have to copy many titles, the operation is troublesome. If you want to erase the titles from the hard disk after copying the titles to the magneto-optical disk, it becomes more troublesome. There has been a demand for a device that can easily perform simple operations.
[0007]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention is directed to writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal. Means for writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal, and writing and reading digital data to and from a detachable second recording medium A predetermined information recorded on the second recording medium, andAmong the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,Based on the predetermined information, the first recording medium, Corresponding to digital data written to the first recording medium after the time stamp informationA means for searching for management information of the recording medium, and based on the search result,Digital data corresponding to management information including the predetermined information is obtained from the first recording medium.It is characterized by comprising reading and writing to the second recording medium.
[0008]
  The present invention also provides means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal. Digital recording / reproducing having a means for writing and reading digital data to and from a detachable second recording medium capable of writing and reading digital data including a signal and management information corresponding to the video / audio signal In the apparatus, predetermined information recorded on the second recording medium;Among the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,Based on the predetermined information, the first recording medium, Corresponding to digital data written to the first recording medium after the time stamp informationBased on means for searching for management information and the search results,Digital data corresponding to management information including the predetermined information is obtained from the first recording medium.The digital data is read and written to the second recording medium, and the digital data of the first recording medium written to the second recording medium is deleted.
[0009]
  The present invention also provides means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal. Digital recording / reproducing having a means for writing and reading digital data to and from a detachable second recording medium capable of writing and reading digital data including a signal and management information corresponding to the video / audio signal In the apparatus, predetermined information recorded on the second recording medium;Among the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,Based on the predetermined information, the first recording medium, Corresponding to digital data written to the first recording medium after the time stamp informationBased on means for searching for management information and the search results,Digital data corresponding to management information including the predetermined information is obtained from the first recording medium.In addition to reading and writing to the second recording medium, an inquiry is made as to whether or not to delete the digital data of the first recording medium written to the second recording medium.
[0010]
In the present invention, the predetermined information is a name given to the digital data.
In the present invention, the predetermined information is a genre given to digital data.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals denote the same or corresponding parts.
[Overall configuration of digital recording / playback apparatus]
FIG. 1 is a block diagram showing a basic overall configuration of a digital recording / reproducing apparatus according to an embodiment of the present invention. In the figure, signal lines indicated by bold lines are signal lines representing the flow of video and / or audio data, and signal lines indicated by thin lines are signal lines representing the flow of control signals.
[0012]
Referring to FIG. 1, for example, a television broadcast signal wave received by antenna 100 is applied to tuners 102 and 103 in common.
The tuner 102 selects the signal radio wave of one channel designated by the user from the signal radio wave received by the antenna 100, demodulates it into an analog television signal composed of a video signal and an audio signal, and selects one of the selectors 104. Give to input. The other input of the selector 104 is connected to an external input terminal 101 to which various external television signal sources such as a video tape recorder (VTR) and a camcorder can be connected.
[0013]
The selector 104 selects either the output from the tuner 102 or the input from the external input terminal 101 and supplies it to the A / D converter 105 and also supplies it to one input of the graphic controller 124. Generally, the selector 104 selects an input from the external input terminal 101 when any external signal source is connected to the external input terminal 101, and selects an output of the tuner 102 when not connected.
[0014]
The A / D converter 105 converts the video signal and audio signal of the analog television signal output from the selector 104 into digital signals, respectively, and supplies the digital video signal to the MPEG2 video encoder 107, and also converts the digital audio signal into an audio encoder. 109.
The MPEG2 video encoder 107 compresses the supplied digital video signal and supplies it to the multiplexer / demultiplexer 111, and the audio encoder 109 compresses the supplied digital audio signal and supplies it to the multiplexer / demultiplexer 111. The multiplexer / demultiplexer 111 multiplexes the supplied video signal stream and audio signal stream, and converts them into an MPEG2 system stream.
[0015]
On the other hand, the tuner 103 selects the signal radio wave of one channel designated by the user from the signal radio wave received by the antenna 100, demodulates it to an analog television signal composed of a video signal and an audio signal, and performs A / D. It is provided to the converter 106 and to the other input of the graphic controller 124.
The A / D converter 106 converts a video signal and an audio signal of an analog television signal output from the tuner 103 into digital signals, respectively, and supplies the digital video signal to the MPEG2 video encoder 108, and also converts the digital audio signal into an audio encoder. 110.
[0016]
The MPEG2 video encoder 108 compresses the supplied digital video signal and applies it to the multiplexer / demultiplexer 111, and the audio encoder 110 compresses the supplied digital audio signal and supplies it to the multiplexer / demultiplexer 111. The multiplexer / demultiplexer 111 multiplexes the supplied video signal stream and audio signal stream, and converts them into an MPEG2 system stream.
[0017]
This digital recording / reproducing apparatus is provided with an HDD 119 and an MO (Magneto Optical) drive 130 for reading and writing a magneto-optical disk which is an example of a detachable recording medium.
Writing / reading data to / from the HDD 119 and writing / reading data to / from the MO drive 130 are executed by the HD / MO controller module 118.
[0018]
Between the above multiplexer / demultiplexer 111 and the HD / MO controller module 118, a first data bus including the buffer memory 116 in the middle, a second data bus including the buffer memory 117 in the middle, There are provided three data channels including a third data bus including the buffer memory 131 in the middle.
[0019]
Further, digital data from other devices externally connected via the digital input 128 can be input to the buffer memory 116, while the digital data in the buffer memory 117 can be externally connected via the digital output 129. Can be output to other devices.
Therefore, as will be described later, MPEG2 system stream data is transferred between the multiplexer / demultiplexer 111, the HD / MO controller module 118, the digital input 128, and the digital output 129 via the buffer memories 116 and 117. Exchanges will take place.
[0020]
The multiplexer / demultiplexer 111 demultiplexes the MPEG2 system stream received from the buffer memories 116 and 117 into a video signal stream and an audio signal stream, the former being the MPEG2 video decoder 112 and the latter being the audio decoder 113. To give.
The MPEG2 video decoder 112 decodes the supplied video signal stream and supplies it to the D / A converter 114, and the audio decoder 113 decodes the supplied audio signal stream and supplies it to the D / A converter 114. The D / A converter 114 converts the applied signals into analog signals, respectively, and supplies an analog television signal composed of a video signal and an audio signal to yet another input of the graphic controller 124.
[0021]
The graphic controller 124 selects any one of the analog television signals given from the selector 104, the tuner 103, and the D / A converter 114, and is connected to the outside of the digital recording / reproducing apparatus. 126.
The operations of the multiplexer / demultiplexer 111 and the graphic controller 124 are controlled by a control signal supplied from the system controller 120.
[0022]
When this digital recording / reproducing apparatus is connected to other external apparatuses via the digital input 128 and the digital output 129, the control signal from the system controller 120 is transmitted through the digital input 128 (thin line) and the like. A control signal from the system controller (not shown) of the apparatus is supplied to the system controller 120 of the digital recording / reproducing apparatus via a digital output 129 (thin line).
[0023]
A user interface 122, a memory 121, and a real time clock module 127 are connected to the system controller 120.
The basic operation principles such as recording, reproduction, and erasure of the digital recording / reproducing apparatus according to the present invention shown in FIG. 1 will be described in detail later in relation to the file format in the hard disk and magneto-optical disk used in the present invention. First, the characteristic operation of the present invention will be described with reference to the block diagram of FIG. 1 and the timing diagrams of FIGS.
[0024]
According to the embodiment of the present invention, as shown in FIG. 1, the digital recording / playback apparatus includes at least two MPEG2 encoding circuits (MPEG2 video encoders 107 and 108) and at least one MPEG2 decoding circuit (MPEG2 video encoders 107 and 108). An MPEG2 video decoder 112) is provided, and any two of them can be operated simultaneously while maintaining real-time characteristics.
[0025]
According to the embodiment of the present invention, as shown in FIG. 1, the digital recording / reproducing apparatus includes at least two MPEG2 encoding circuits (MPEG2 video encoders 107 and 108) and at least one MPEG2 decoding circuit (MPEG2). A video decoder 112) is provided, and any two of them can be operated simultaneously while maintaining real-time characteristics.
[0026]
The basic operation principle such as recording, reproduction, and erasure of the digital recording / reproducing apparatus according to the present invention shown in FIG. 1 will be described in detail later in relation to the file format of digital data recorded on the hard disk and magneto-optical disk. First, the basic operation of the digital recording / reproducing apparatus will be described with reference to the block diagram of FIG. 1 and the timing diagrams of FIGS.
[0027]
[Normal recording function]
First, FIG. 2 is a timing chart for explaining the recording operation of one channel of the digital recording / reproducing apparatus shown in FIG.
During normal (timer) recording, for example, the user sets the channel, recording start time, and recording end time of a television program to be recorded by operating the user interface 122. For example, when channel 1 is set to record from 8 pm to 10 pm, the system controller 120 designates the tuner 103 as channel 1 at 8 pm based on information from the real-time clock module 127. Tuner 103 selects and demodulates channel 1 signal radio waves from the signal radio waves received by antenna 100.
[0028]
The demodulated signal is converted into an MPEG2 system stream via the A / D converter 106, the MPEG2 video encoder 108, the audio encoder 110, and the multiplexer / demultiplexer 111 as described above.
The system controller 120 selects the first data bus including the buffer memory 116, and accordingly, the MPEG2 system stream is provided to the HD / MO controller module 118 via the buffer memory 116. The HD / MO controller module 118 writes data into the HDD 119 using an interface command with the HDD 119.
[0029]
2, (a) shows the time axis, (b) shows the processing time for writing from the multiplexer / demultiplexer 111 to the buffer memory 116, and (c) shows the HD / MO controller module 118 from the buffer memory 116. The processing time for writing to the HDD 119 is shown.
The MPEG2 system stream formed by the multiplexer / demultiplexer 111 is constantly sent to the buffer memory 116 provided on the first data bus at the bit rate of the system stream.
[0030]
The amount of data in the buffer memory 116 is monitored by the HD / MO controller module 118. When the amount of data exceeds a certain threshold value, processing for writing the amount of data corresponding to the threshold value to the HDD 119 is performed. Since the writing speed to the HDD 119 is higher than the bit rate of the system stream, the writing process time to the HDD 119 by the HD / MO controller module 118 is short. That is, the amount of data transferred from the multiplexer / demultiplexer 111 to the buffer memory 116 at the time indicated by the thick line in FIG. 2B and the data amount transmitted from the buffer memory 116 to the HDD 119 at the time indicated by the thick line in FIG. The amount of data to be stored is the same.
[0031]
In this way, channel 1 recording is performed from 8 pm to 10 pm, and the recording ends at 10 pm.
[Normal playback function]
FIG. 3 is a timing chart for explaining the reproduction operation of one channel of the digital recording / reproducing apparatus shown in FIG.
[0032]
During normal playback, for example, the user operates the user interface 122 to instruct playback of a desired title. In response to this, the system controller 120 instructs the HD / MO controller module 118 to read data of a desired title from the HDD 119.
At this time, the system controller 120 selects the first data bus including the buffer memory 116, and the data read from the HDD 119 according to this selects the multiplexer via the HD / MO controller module 118 and the buffer memory 116. / Transfer to the demultiplexer 111.
[0033]
3A shows the time axis, FIG. 3B shows the processing time for reading data from the HDD 119 via the HD / MO controller module 118, and writing it into the buffer memory 116, and FIG. 3C shows the buffer memory. The write processing time from 116 to the multiplexer / demultiplexer 111 is shown.
When reproduction start is instructed by the system controller 120, the HD / MO controller module 118 performs processing for reading data from the HDD 119 and writing it into the buffer memory 116. At this time, the HD / MO controller module 118 monitors the amount of data in the buffer memory 116, and when the amount of data falls below a certain threshold, reads a certain amount of data from the HDD 119 and writes it into the buffer memory 116.
[0034]
Writing data from the buffer memory 116 to the multiplexer / demultiplexer 111 is constantly performed at the bit rate of the system stream. Since the reading speed from the HDD 119 is higher than the bit rate of the MPEG2 system stream, the write processing time to the buffer memory 116 by the HD / MO controller module 118 is short.
[0035]
That is, the amount of data transferred from the HDD 119 to the buffer memory 116 at the time indicated by the thick line in FIG. 3B and the data amount transferred from the buffer memory 116 to the multiplexer / demultiplexer 111 at the time indicated by the thick line in FIG. The amount of data to be stored is the same.
The video signal and the audio signal demultiplexed by the multiplexer / demultiplexer 111 are sent to the MPEG2 video decoder 112 and the audio decoder 113, respectively.
[0036]
As described above, the video signal decoded by the MPEG2 video decoder 112 and the audio signal decoded by the audio decoder 113 are converted into an analog television signal by the D / A converter 114 and are externally connected via the graphic controller 124. Are reproduced and displayed on the television monitor 126.
[0037]
[2-channel simultaneous recording function]
FIG. 4 is a timing chart for explaining the simultaneous recording operation of two channels of the digital recording / reproducing apparatus shown in FIG.
At the time of two-channel simultaneous recording, the user operates the user interface 122 to set a channel of a television program to be recorded, a recording start time, and a recording end time. For example, if channel 1 is set to record from 8:00 pm to 10:00 pm and channel 3 is set to record from 9:00 pm to 11:00 pm, the system controller 120 is based on information from the real time clock module 127. At 8 pm, the tuner 103 is designated as channel 1, and the tuner 103 selects and demodulates the signal radio wave of channel 1 from the signal radio wave received by the antenna 100.
[0038]
The demodulated signal is converted into an MPEG2 system stream via the A / D converter 106, the MPEG2 video encoder 108, the audio encoder 110, and the multiplexer / demultiplexer 111 as described above.
At this point, since the first data bus including the buffer memory 116 and the second data bus including the buffer memory 117 are not used, the system controller 120 selects the first data bus including the buffer memory 116. Accordingly, the MPEG2 system stream is transferred from the multiplexer / demultiplexer 111 to the HD / MO controller module 118 via the buffer memory 116. The HD / MO controller module 118 writes data into the HDD 119 using an interface command with the HDD 119.
[0039]
Based on the information from the real-time clock module 127, the system controller 120 designates the tuner 102 as channel 3 at 9:00 pm, and the tuner 102 selects the signal radio wave of channel 3 from the signal radio wave received by the antenna 100. Demodulate.
As described above, the demodulated signal is converted into an MPEG2 system stream via the selector 104, the A / D converter 105, the MPEG2 video encoder 107, the audio encoder 109, and the multiplexer / demultiplexer 111.
[0040]
Of the two data buses between the multiplexer / demultiplexer 111 and the HD / MO controller module 118, the first data bus including the buffer memory 116 is already used for recording of channel 1 from 8:00 pm. Therefore, the system controller 120 selects the second data bus including the buffer memory 117, and accordingly, the MPEG2 system stream is transferred from the multiplexer / demultiplexer 111 to the HD / MO controller module 118 via the buffer memory 117. Given. The HD / MO controller module 118 writes data into the HDD 119 using an interface command with the HDD 119.
[0041]
At this time, the HD / MO controller module 118 writes the two MPEG2 system streams alternately into the HDD 119 for each unit of a certain length. That is, during the period when the channel 1 system stream data is read from the buffer memory 116 and written to the HDD 119, the channel 3 system stream data is stored in the buffer memory 117, and the channel 3 system stream data is stored in the buffer memory 117. During the period of reading and writing to the HDD 119, the channel 1 system stream data is stored in the buffer memory 116.
[0042]
As described above, from 9 pm to 10 pm, the state where two channels of channel 1 and channel 3 are simultaneously recorded continues.
4A shows the time axis, FIG. 4B shows the write processing time from the multiplexer / demultiplexer 111 to the buffer memory 116, and FIG. 4C shows the buffer memory 117 from the multiplexer / demultiplexer 111. (D) shows the processing time of writing from the buffer memory 116 to the HDD 119 via the HD / MO controller module 118, and (e) shows the processing time of the buffer memory 117 to the HD / MO controller. The processing time for writing to the HDD 119 via the module 118 is shown.
[0043]
Referring to FIG. 4, when the start of the first recording for channel 1 is instructed, the recording process described with reference to FIG. 2 is performed. Thereafter, when the start of the second recording for the channel 3 is instructed, both the writing process from the buffer memory 116 and the writing process from the buffer memory 117 are performed on the HDD 119. The arbitration between the two writing processes is performed by the HD / MO controller module 118.
[0044]
As specifically shown in FIG. 4, since the HDD 119 is in a usable state when the amount of data in the buffer memory 117 exceeds a certain threshold after the start of the second recording, the data writing process to the HDD 119 is performed. Is done. While this processing is being performed, the amount of data in the buffer memory 116 exceeds the threshold value, and writing to the HDD 119 is requested. However, since the HDD 119 is in use, it waits until the writing processing of the HDD 119 ends. It will be. When the writing from the buffer memory 117 to the HDD 119 is completed, the writing process from the buffer memory 116 is started.
[0045]
Conversely, if the HDD 119 is in use when the amount of data in the buffer memory 117 exceeds the threshold after the start of the second video recording, the HDD 119 waits until it can be used and then writes data from the buffer memory 117 to the HDD 119. Processing is performed. After the simultaneous recording of the two channels as described above proceeds, the recording of channel 1 ends at 10:00 pm and the recording of channel 3 ends at 11:00 pm.
[0046]
As described above, since data is transferred at high speed between the HD / MO controller module 118 and the HDD 119, real-time recording of two systems of MPEG2 system stream data can be realized only by providing the two buffer memories 116 and 117.
The capacity of each buffer memory is calculated from the write / read unit block length, the data transfer rate between the HD / MO controller module 118 and the HDD 119, the MPEG2 system stream rate, and the worst value of the HDD 119 seek time. be able to. This calculation will be described later in detail.
[0047]
In addition, the memory 121 stores a file system for managing free areas of the HDD 119 and managing files. Accordingly, the logical address to which the system stream is to be written / read next is specified by the file system to the HD / MO controller module 118 via the system controller 120. As a result, even when two channels are recorded simultaneously, the HD / MO controller module 118 manages the logical address designated by the system controller 120 because the file system manages the logical address to be recorded next. Thus, data writing / reading may be performed. This management by the file system will be described in detail later.
[0048]
In the above example, two channels of television broadcasting are recorded simultaneously. However, when a VTR, a camcorder, or the like is connected to the external input terminal 101 in FIG. Is done. As a result, it is also possible to simultaneously perform dubbing to the HDD 119 from an external television signal source via the external input terminal 101 while recording television broadcasting to the HDD 119 via the tuner 103.
[0049]
[Chase playback function]
FIG. 5 is a timing chart for explaining a so-called chasing playback function of the digital recording / playback apparatus shown in FIG.
The so-called “chasing playback” refers to a function for simultaneously playing back a recorded program while recording a television broadcast.
[0050]
For example, if the user sets channel 1 to record from 8 pm to 10 pm, the system controller 120 sets the tuner 103 to channel 1 at 8 pm based on information from the real time clock module 127. The tuner 103 selects and demodulates the channel 1 signal radio wave from the signal radio waves received by the antenna 100.
[0051]
As described above, the demodulated signal is converted into an MPEG2 system stream via the A / D converter 106, the MPEG2 video encoder 108, the audio encoder 110, and the multiplexer / demultiplexer 111.
At this point, since the two data buses are not used, the system controller 120 selects the first data bus including the buffer memory 116, and accordingly, the MPEG2 system stream is converted into the multiplexer / demultiplexer. 111 to the HD / MO controller module 118 via the buffer memory 116. The HD / MO controller module 118 writes data into the HDD 119 using an interface command with the HDD 119.
[0052]
When the user returns home at 9:00 pm and wants to view the title of channel 1 being recorded from the beginning, the user interface 122 is operated to instruct playback of the title being recorded. In response to this, the system controller 120 instructs the HD / MO controller module 118 to read out the title being recorded from the HDD 119.
[0053]
At this time, since the first data bus via the buffer memory 116 is already used between the multiplexer / demultiplexer 111 and the HD / MO controller module 118, the second data bus via the buffer memory 117 is used. This is instructed by the system controller 120.
Data read from the HDD 119 is transferred to the multiplexer / demultiplexer 111 via the HD / MO controller module 118 and the buffer memory 117.
[0054]
The multiplexer / demultiplexer 111 demultiplexes the MPEG2 system stream received from the buffer memory 117 into a video signal stream and an audio signal stream, and supplies the former to the MPEG2 video decoder 112 and the latter to the audio decoder 113. .
The MPEG2 video decoder 112 decodes the supplied video signal stream and supplies it to the D / A converter 114, and the audio decoder 113 decodes the supplied audio signal stream and supplies it to the D / A converter 114. The D / A converter 114 converts each received signal into an analog signal, and provides an analog television signal composed of a video signal and an audio signal to one input of the graphic controller 124.
[0055]
The graphic controller 124 gives the given analog television signal to the television monitor 126 connected to the outside of the digital recording / reproducing apparatus, and reproduces and displays the television signal.
Note that, by the operation of the user interface 122, the television signal output to the external television monitor 126, the television signal from the tuner 103, or the television in which either the tuner 102 or the external input terminal 101 is selected by the selector 104 is selected. It is also possible to switch to the John signal and display the output. Furthermore, any two or three signals can be arbitrarily selected from these three television signals and clipped by the graphic controller 124 to be displayed at a time.
[0056]
In the case of this chasing playback, the HD / MO controller module 118 writes / reads two MPEG2 system streams to / from the HDD 119 alternately for each unit of a fixed length. That is, the channel 1 system stream generated by the multiplexer / demultiplexer 111 is stored in the buffer memory 116 while the channel 1 system stream data is read from the HDD 119 and written to the buffer memory 117.
[0057]
On the other hand, while the system stream data of channel 1 is read from the buffer memory 116 and written to the HDD 119, the system stream data of channel 1 stored in the buffer memory 117 is sent to the MPEG2 video decoder 112 via the multiplexer / demultiplexer 111. And supplied to the audio decoder 113.
[0058]
The chasing playback operation using these two channels will be described in more detail with reference to the timing chart of FIG. 5A shows the time axis, FIG. 5B shows the write processing time from the multiplexer / demultiplexer 111 to the buffer memory 116, and FIG. 5C shows the HD / MO controller module from the buffer memory 116. 118 shows the processing time for writing to the HDD 119 via 118, (d) shows the processing time for reading data from the HDD 119 via the HD / MO controller module 118 and writing to the buffer memory 117, and (e) for the buffer The write processing time from the memory 117 to the multiplexer / demultiplexer 111 is shown.
[0059]
When the start of recording is instructed, the recording process described with reference to FIG. 2 is performed. Thereafter, when the start of reproduction is instructed, the reproduction process described with reference to FIG. 3 is performed. At that time, both the writing process from the buffer memory 116 and the reading process for transferring to the buffer memory 117 are performed on the HDD 119. The arbitration between the two processes is performed by the HD / MO controller module 118.
[0060]
Specifically, in FIG. 5, since the HDD 119 is in a usable state at the start of reproduction, processing for reading data from the HDD 119 and writing it into the buffer memory 117 is performed. While this processing is being performed, the data amount of the buffer memory 116 may exceed the threshold value, and writing to the HDD 119 may be requested. However, in this case, since the HDD 119 is in use, writing is waited until the processing is completed.
[0061]
When the reading of data from the HDD 119 is completed, the writing process from the buffer memory 116 is started. On the other hand, if the HDD 119 is in use at the start of reproduction, processing for reading data from the HDD 119 and writing to the buffer memory 117 is performed after the HDD 119 is ready for use.
As described above, from 9 pm to 10 pm, channel 1 recording and playback of the channel 1 title being recorded are performed simultaneously. Recording of channel 1 ends at 10:00 pm, and playback of the title recorded at 11:00 pm ends.
[0062]
Even in this chasing playback, since data is transferred at high speed between the HD / MO controller module 118 and the HDD 119, real-time recording / playback of two systems of MPEG2 system streams is possible simply by providing two buffer memories 116 and 117. Can be realized. The capacity of each buffer memory and the unit block length of writing / reading necessary for each buffer memory not to be empty at the time of reproduction are the data transfer rate between the HD / MO controller module 118 and the HDD 119, and the HDD 119 It can be calculated from the worst value of seek time.
[0063]
[Other recording and playback functions]
In the above example, the chasing playback of a title that is being recorded has been described. However, during the recording of a certain title, another previously recorded title may be played back. Recording may be started.
Since the buffer memory 117 is also connected to the digital output 129, the MPEG2 system stream read from the HDD 119 via the HD / MO controller module 118 is output to the digital output 129 via the buffer memory 117. You can also Alternatively, the television signal obtained by selecting either the input television signal from the tuner 103 or the output of the tuner 102 and the input via the external input terminal 101 by the selector 104 is digitally compressed, and the multiplexer / demultiplexer An MPEG2 system stream formed by multiplexing by the multiplexer 111 can also be output to the digital output 129 via the buffer memory 117.
[0064]
Similarly, the buffer memory 116 is also connected to the digital input 128, and the system stream input from the digital input 128 may be recorded on the HDD 119 via the buffer memory 116 and further via the HD / MO controller module 118. On the other hand, via the buffer memory 116, the multiplexer / demultiplexer 111 demultiplexes, and the video signal and audio signal streams are decoded by the MPEG2 video decoder 112 and the audio decoder 113, respectively. It is also possible to reproduce and display on 126. The two input / output buses passing through the buffer memories 116 and 117 can be arbitrarily designated through the user interface 122.
[0065]
[System configuration with multiple players]
Two players configured as the digital recording / playback apparatus shown in the block diagram of FIG. 1 are arranged, and the digital output 129 of one player is connected to the digital input 128 of the other player. Then, two system streams are simultaneously read from the HDD 119 of one player, one system is transferred to the multiplexer / demultiplexer 111 via the buffer memory 116, and the other system is digital output via the buffer memory 117. Is output to
[0066]
The system stream transferred to the multiplexer / demultiplexer 111 is demultiplexed into a video signal stream and an audio signal stream, transferred to the MPEG2 video decoder 112 and the audio decoder 113, respectively, decoded, and then external television. It is output to the monitor 126 and displayed for reproduction.
[0067]
On the other hand, the MPEG2 system stream output from the digital output 129 reaches the digital input 128 of another player by cable or wireless. The MPEG2 system stream input to the other player from here can be recorded in the HDD 119 via the buffer memory 116 and further via the HD / MO controller module 118. Via, the multiplexer / demultiplexer 111 demultiplexes, and the video signal and audio signal streams are decoded by the MPEG2 video decoder 112 and the audio decoder 113, respectively, and externally connected to the other player. It can also be reproduced and displayed on the television monitor 126.
[0068]
When data is recorded in the HDD 119 of another player, the data is copied from the HDD 119 of one player to the HDD 119 of the other player. When the reproduced data is decoded by another player and reproduced and displayed on the external television monitor, the data of the HDD 119 of one player is reproduced by another player. This means that the data in the HDD 119 of the player can be shared by a plurality of players.
[0069]
In the embodiment of FIG. 1, a configuration in which two data buses run between the multiplexer / demultiplexer 111 and the HD / MO controller module 118 is employed, but (system stream rate) × If N (N is an integer) does not exceed the data transfer rate between the HD / MO controller module 118 and the HDD 119, parameters such as the unit block length for writing / reading and the capacity of the buffer memory can be tuned up. N streams can run simultaneously in real time.
[0070]
However, it is necessary to consider the time corresponding to the worst value of the seek time of the HDD 119 between the transfer of the unit blocks. This will be described in detail later.
In the case of N = 3, another buffer memory is inserted between the multiplexer / demultiplexer 111 and the HD / MO controller module 118 in the configuration of the digital recording / reproducing apparatus of FIG. It becomes composition to run. In this case, in addition to the two-channel simultaneous recording described above, any title being recorded on or recorded on the HDD 119 can be reproduced at the same time.
[0071]
In addition, when a player is connected to one player, when each connected player has a bus of n streams, M = an streams run on the entire a player. Become. The number N of buses of one player to which a player is connected is N = M. Thus, when N = M, M buffer memories are included and M buses run between the multiplexer / demultiplexer 111 and the HD / MO controller module 118 in the configuration of FIG.
[0072]
Considering a configuration in which one player has (M−1) digital outputs, connecting this player to other (M−1) players allows data in the HDD 119 of the player to be connected. Can be shared with other (M-1) players.
[Overall configuration of simple player]
FIG. 6 is a block diagram of a simple client-type player when the HDD 119 of the digital recording / playback apparatus (player) shown in FIG. 1 is a server.
[0073]
Referring to FIG. 6, for example, a television broadcast signal radio wave received by the antenna 200 is given to the tuner 202, and the tuner 202 selects a signal radio wave of one channel designated by the user from the received signal radio wave. Then, it is demodulated into an analog television signal composed of a video signal and an audio signal, and given to one input of the selector 204. The other input of the selector 204 is connected to an external input terminal 201 to which various external television signal sources can be connected.
[0074]
The selector 204 selects either the output from the tuner 202 or the input from the external input terminal 201 and supplies it to one input of the graphic controller 224.
On the other hand, the MPEG2 system stream input from another externally connected player (FIG. 1) via the digital input 228 is transferred to the multiplexer / demultiplexer 211, and the multiplexer / demultiplexer 211 receives the received MPEG2 stream. The system stream is demultiplexed into a video signal stream and an audio signal stream, and the former is supplied to the MPEG2 video decoder 212 and the latter to the audio decoder 213.
[0075]
The MPEG2 video decoder 212 decodes the supplied video signal stream and supplies it to the D / A converter 214, and the audio decoder 213 decodes the supplied audio signal stream and supplies it to the D / A converter 214. The D / A converter 214 converts the applied signals into analog signals, and provides an analog television signal composed of a video signal and an audio signal to another input of the graphic controller 224.
[0076]
The graphic controller 224 outputs a television signal from the D / A converter 214 or an output from the tuner 202 and the external input terminal 201 as an output television signal to the television monitor 226 according to the operation of the user interface 222 by the user. Can be displayed by switching to any one of the television signals selected by the selector 204, or by performing clipping processing on both signals. is there.
[0077]
Commands such as search, selection, deletion, timer reservation, playback start, pause, fast forward, rewind, stop, etc. of the title to be played from the HDD 119 (FIG. 1) on the server side are digitally input from the system controller 220. It is sent as a command to the server-side player via 228 and received by the server-side digital output 129 (FIG. 1). This command is transferred to the server-side system controller 120 (FIG. 1), where the command is executed.
[0078]
As described above, regarding the digital input 128 and digital output 129 of the player in FIG. 1 and the digital input 228 of the simple player in FIG. 6, “input” and “output” are inputs of MPEG2 system stream data (thick line). In addition to these data, it is necessary to transfer control commands such as playback start and stop, and the transfer direction of these control commands (thin lines) is stream data. This is the opposite of the transfer direction.
[0079]
[Capacity of buffer memory]
Next, as described above, the capacity C of the buffer memory, the unit block length L for writing / reading, and the HD / MO controller module 118 and the HDD 119 necessary for simultaneously handling a plurality of stream data in real time. The relationship among the worst case data transfer rate Bhdd, the MPEG2 system stream rate Bsys, and the worst value Tw of the seek time of the HDD 119 will be described in detail.
[0080]
However, the worst value Tw of the seek time is not just the time required for the seek of the head, but the seek time, the rotation waiting time, and the head switching required from the start of the seek to the actual start of data writing / reading. This is a time that takes into account all worst group delay values such as time and time required for error correction such as ECC / EDC.
If the number of streams to be processed simultaneously is N, the following formula must be satisfied in order to maintain the real-time property of all streams.
[0081]
Bhdd × Ts> N × (Tw + Ts) × Bsys (1)
However, Ts is the time required to write / read the unit block length L of writing / reading to / from the HDD 119, and is represented by Ts = L / Bhdd.
In the above equation (1), in the case of data reading (reproduction), the amount of data read in a unit block in a stream is N seek times and N times for processing N streams. This means that it is necessary to design so as not to be consumed within the sum of the data write / read time.
[0082]
Further, in the case of data writing (recording), the amount of data stored in the buffer memory in the time required to process N streams is N × (Tw + Ts) × Bsys in the worst case. Means.
Therefore, the capacity C of the buffer memory needs to satisfy the following formula.
C> N × (Tw + Ts) × Bsys (2)
By designing so as to satisfy the above equations (1) and (2), N streams can be simultaneously processed in real time. However, N must be set within a range satisfying Bhdd> N × Bsys.
[0083]
[OPF (Objective Pool Format)]
Next, a file format of digital data recorded on the hard disk (HDD 119) and the magneto-optical disk used in the present invention will be described.
The file format described below is referred to as an Objective Pool Format (hereinafter referred to as OPF) for convenience. FIG. 7 is a diagram for schematically explaining the configuration of this OPF file.
[0084]
As shown in FIG. 7, the OPF file format includes a real-time extent 301, a container information file 302, a title set file 303, and a title file 304. The role of each file will be described below with reference to FIG.
(1) Container
A container is a basic unit of data operation in OPF. In the system of the present invention, each container is closed as an MPEG data structure, and data reproduction by a single container is guaranteed. The container sizes in the system of the present invention are as follows:
(Sector size of HDD 119) × 5376 = 512 bytes × 5376 = 2752512 bytes
Video data and audio data for a certain period of time are stored in this capacity container. In the system of the present invention, video data (Group of Pictures: hereinafter referred to as GOP) encoded by MPEG2 and audio data corresponding thereto are multiplexed by a multiplexer / demultiplexer 111 to form a system stream.
[0085]
Also, since the number of pictures in 1 GOP is set to 15, the playback time of 1 container is as follows.
5 x (15/30) = 2.5 seconds
Here, with respect to these parameters, it is verified whether or not reproduction in a container unit is guaranteed.
[0086]
In the above definition, if the unit block (container) length for writing / reading is L = 2752512 bytes, the rate Bsys of the MPEG2 system stream is
Bsys = L / 2.5 = 1110004 bytes / second
It becomes.
In the system of the present invention, the number of streams is N = 2, the worst value of seek time is Tw = 50 ms, and the worst case data transfer rate between the HD / MO controller module 118 and the HDD 119 is Bhdd = 5 MB / Assuming seconds
Ts = L / Bhdd = 550 ms
Holds. Therefore,
Bhdd × Ts = 5 × 10⁶× 550 × 10^-3= 2.76 × 10⁶
N × (Tw + Ts) × Bsys = 2 × (50 + 550) × 10^-3× 1101004 = 1.32 × 10⁶
Thus, the above equation (1) is satisfied. Therefore, reproduction of data in units of containers is guaranteed with these defined parameters.
[0087]
(2) Real-time extent
The real-time extent 301 is an area of the HDD 119 in which the MPEG2 system stream created by the multiplexer / demultiplexer 111 is stored as the above-mentioned container unit data. Therefore, the total capacity of the real-time extent 301 is always an integral multiple of the capacity of a single container. Also, in the HDD 119 that performs recording in sector units, the start address of the real-time extent 301 must be from an address that is a container delimiter. This is because the disk space is regarded as an address space for each container in the container information file 302 described later.
[0088]
(3) Container information file
The container information file 302 manages the recording information of each container when the real-time extent 301 in the recording area of the HDD 119 is regarded as a container unit address space and container numbers (R0, R1, R2,...) Are assigned in order. Is defined for. When the reference number (link count) for each container is 0, it indicates that no MPEG2 data has been recorded in the container from the beginning, or that the user has performed a data erasing operation. This indicates that new data recording is possible. In the example of FIG. 7, containers R8 and R15 correspond to recordable containers. When the reference number (link count) is 1, it indicates that the container is referenced by at least one of the title files (MPEG2 data is stored), and the container cannot be recorded. .
[0089]
(4) Title file
In the title file 304, link information about the title is recorded. Specifically, as shown in FIG. 7, in each title file, header information and address information of a start position of a container to be referenced in the real-time extent 301 are sequentially recorded. In FIG. 7, the title file (title 0) 304-1 stores the start addresses of the real-time extents R0 to R3 and R6, and the title file (title 1) 304-2 stores the real-time extents R4, R5, R7, The start addresses of R9 to R12 are stored, and the title file (title 2) 304-3 stores the start addresses of the real-time extents R13, R14, and R16.
[0090]
(5) Title set file
The title set file 303 is a file for managing the title file 304. The configuration includes header information and a start address in the HDD 119 of each title file. In FIG. 7, the title 0 descriptor stores the start address of the title file (title 0) 304-1, the title 1 descriptor stores the start address of the title file (title 1) 304-2, The title 2 descriptor stores the start address of the title file (title 2) 304-3.
[0091]
[Recording / playback operation using OPF]
The basic operation of the digital recording / reproducing apparatus according to the present invention using the above-mentioned OPF file format will be described in detail below.
Note that all the above-mentioned OPF files are recorded in the HDD 119, but when the digital recording / reproducing apparatus is activated, the container information file 302, the title set file 303, and the title file 304 of the OPF are read to the memory 121. And used for address control by the system controller 120. The content of the updated file in the memory 121 is written to the file in the HDD 119 at an appropriate timing, and the OPF is updated. However, in the present invention, as described above, even when the management information needs to be rewritten, If there are streams being recorded or reproduced, the real-time property of these streams is prioritized, and management information (container information file 302 and title set file 303 read out to the memory 121) is stopped after recording or reproduction is stopped. , The information of the title file 304) is updated (writing to the file of the HDD 119).
[0092]
In the following, a normal recording / reproducing operation using the OPF will be described in detail, and an operation of automatically creating a library from the HDD 119 to the magneto-optical disk, which is a feature of the present application, will be described based on FIGS.
(1) Recording operation
First, the operation when MPEG2 system stream data is recorded on the HDD 119 will be described with reference to the flowcharts of FIGS.
[0093]
First, when the user operates the user interface 122 to instruct recording (step S1), the system controller 120 refers to the container information file 302 read out from the HDD 119, and is a writable area in the real-time extent 301. (Container) is secured (step S2). That is, the container whose reference number (link count) is 0 is searched from the container information file 302. Then, in the case of the two-channel simultaneous recording described above, 1 is added to the number of the corresponding container whose reference number of the container information file 302 is 0 so that it is not used by other recording procedures (step) S3). Then, data for one container is written in the real-time extent 301 of the HDD 119 corresponding to the retrieved container number (step S4).
[0094]
When an end instruction is received from the user via the user interface 122 (step S5), the title file 304 is generated, the title set file 303 is updated, and the recording process is ended (step S6). If there is no end instruction, the procedure of steps S2 to S5 is repeated. The recording stop request from the user is instructed at an arbitrary timing after the recording is started. This instruction request is temporarily stored in the memory 121 and processed in step S5.
[0095]
In the state shown in FIG. 7, when a recording instruction is received in step S1, the area (container) initially reserved in step S2 is R8 having a reference number of zero. In step S3, 1 is set in the R8 area of the container information file 302.
In step S4, one container of MPEG2 system stream data from the multiplexer / demultiplexer 111 is written in the HDD 119 area corresponding to the start address of the container R8.
[0096]
In step S2, the next area R15 having a reference number of 0 is secured, and the recording operation is repeated in the same manner. When an instruction to end recording is received in step S5, a title file (title 3) is generated in step S6, and link information including discretely recorded container numbers is stored. Then, the title set file is updated and the recording is finished.
[0097]
(2) Playback operation
Next, an operation for reproducing MPEG2 system stream data recorded on the HDD 119 will be described with reference to the flowcharts of FIGS.
When the user operates the user interface 122 to indicate a title to be played (step S11), the system controller 120 initializes a playback container pointer (step S12). The container pointer is a pointer indicating which container is currently pointed in the corresponding title file.
[0098]
Then, the corresponding title file 304 is selected from the title set file 303, the link information to the container referenced in the title set file 303 is scanned by the value of the container pointer, and the container to be reproduced is searched (step S13). Data for one container is read from the real-time extent 301 in the disk area of the HDD 119 corresponding to the retrieved container number, and is reproduced (step S14).
[0099]
Here, when an end instruction is received from the user via the user interface 122 (step S15), an end process is performed and the reproduction operation is ended (step S18). The reproduction stop request from the user is instructed at an arbitrary timing after the reproduction is started, but the instruction request is temporarily stored in the memory 121 and processed in step S15.
[0100]
If there is no end instruction, 1 is added to the container pointer to refer to the container to be reproduced next (step S16). Here, it is checked whether or not the container pointer has reached the end of the corresponding title file 304 (step S17). When the end of the title file is reached, the process proceeds to an end process (step S18) and the process ends. When the container pointer has not reached the end of the title file 304, steps S13 to S17 are repeated.
[0101]
A specific example will be described with reference to FIG.
When an instruction to reproduce title number 1 is received in step S11, the start address of the title file (title 1) is retrieved in step S13, and the container number R4 to be referred to is obtained. In step S14, data for one container is transferred to the multiplexer / demultiplexer 111 from the address corresponding to the container number R4 of the HDD 119, and the data is reproduced. If no reproduction stop command is received in step S15, 1 is added to the container pointer in step S16.
[0102]
Returning to step S13, the container number R5 pointed to by the container pointer is obtained. The reproduction is performed by repeating the same procedure. When playback has progressed and container number R12 has been played back, if 1 is added to the container pointer in step S16, it is determined that the end of the title file has been reached in step S17. Exit.
[0103]
(3) Erase operation
Next, an operation for deleting the MPEG2 system stream data recorded in the HDD 119 in units of title files 304 will be described with reference to the flowcharts of FIGS.
When the user operates the user interface 122 to designate a title file to be deleted (step S21), the system controller 120 searches the title set file 303 to be deleted from the title set file 303 stored in the HDD 119, and the corresponding title. The link count of the container information file 302 corresponding to the container number indicated by the file 304 is decreased by 1 (step S22). As a result, the container having the link count of 0 becomes a free area because it is not referenced in any title file. Next, the instructed title file is deleted (step S23), and the title set file is updated (step S24).
[0104]
For example, assume that an instruction to delete the title file (title 0) is received from the state of FIG. 7 (step S21). In response to this, in step S22, the link counts of the portions R0 to R3 and R6 in the container information file 302 are decreased by 1 to 0. In steps S23 and S24, the title file (title 0) is deleted, and the title 0 descriptor is deleted from the title set file. As a result, the erase operation ends.
[0105]
[Easy title management]
Hereinafter, video signals, audio signals, and signals including video and audio are collectively referred to as video and audio signals. This video / audio signal is recorded in the HDD 119 as a title.
FIG. 11 is a configuration diagram of management information added as a title file 304 compliant with OPF when a title is generated.
[0106]
Referring to FIG. 11, title file 304 includes a header area 701 and a pointer area 702.
The header area 701 includes a title ID 703 that is information necessary for the system to identify a title, title detailed information 704 that is used to display a title list and the like, and title attached information 705 that is attached information to the title. .
[0107]
The title detailed information 704 is information that can be rewritten as necessary by the user.
The title attached information 705 includes a title generation time 712, a last access time 713, a recording time 714, channel information 715, day information 716, the number of pointers, and other information. However, the day-of-week information 716 can be calculated from the title generation time and may not be added. These title-attached information is set so that manual rewriting by the user is impossible.
[0108]
The pointer area 702 includes pointers 706, 707,. The pointers 706 and 707 are pointers indicating real-time extent areas to be recorded and reproduced among the real-time extents 708 to 711 in which the container which is the content of the video / audio signal of the title is recorded.
FIG. 12 is a diagram showing a state where a list of titles is displayed.
[0109]
Referring to FIGS. 11 and 12, the total number of recorded titles “4” is displayed from the top of the screen, and the contents of detailed title information 704 corresponding to the four titles are displayed in order. On the right side, the current state of each title is displayed. The detailed title information 704 automatically stores, as the detailed title information 704, a character string that can be understood based on the date, time, day information and channel information 715 obtained from the title generation time 712 included in the title attached information 705. This is displayed on the screen.
[0110]
For example, it can be seen that the title No. 1 is a channel 6 program recorded from 20:00 on Sunday, September 20, 1999, and is currently being reproduced. Also, it can be seen that the title No. 3 is a channel 10 program recorded from 13:57 on Monday, October 4, 1999, and the status is currently being recorded.
[0111]
As described above, when the title list is displayed, it is easy for the user to understand when and which channel is recorded.
However, the field of the title detailed information 704 is also an area that can be manually rewritten by the user. Therefore, the user can input an arbitrary character string himself and add a title name that is most easily identified by the user. Even after the title name is overwritten by the user, the date, time, day of the week information, and channel information are stored in the title attached information 705. Therefore, the title detailed information 704 area may be restored to the automatically generated state. Is possible.
[0112]
FIG. 13 is a flowchart of automatic addition of detailed title information 704 when manual recording is performed according to a request from the user.
Referring to FIGS. 1 and 13, in step S <b> 71, a recording start command is input via user interface 122.
In step S72, the current time information is read from the real-time clock module 127 into the system controller 120, and the system controller 120 stores the current time information in the memory 121.
[0113]
In step S73, a recording process is performed. The recording process is performed according to the flowchart shown in FIG.
In step S74, the system controller 120 causes the graphic controller 124 to output a display to that effect to the television monitor 126 so that the user can manually determine whether or not to add a title name to the title detailed information 704. To instruct. If the user manually selects a title name, the process proceeds to step S77. On the other hand, when the title name is automatically added, the process proceeds to step S75.
[0114]
However, the processing in step S74 and step S75 may be performed while the recording processing is being executed in the background after the recording processing in step S73 is started.
In step S75, each parameter obtained in step S72 is converted into a title name which is character string information as shown in FIG. In step S76, the created title file 304 is recorded in the HDD 119, and the process of automatically adding a title name during manual recording ends.
[0115]
On the other hand, in step S77, characters that can be input are displayed on the television monitor 126, and the input characters input from the user interface 122 are stored in the memory as the title detailed information 704.
FIG. 14 is a flowchart of automatic addition of detailed title information 704 when performing scheduled recording.
[0116]
Referring to FIGS. 1 and 14, in step S <b> 81, a reservation recording setting command is input via user interface 122.
In step S <b> 82, information such as the date and time related to the setting for reserved recording is input via the user interface 122.
In step S83, a reserved recording area is secured. The processing in step S83 is performed in steps S2 and S3 in the recording flow shown in FIG.
[0117]
In step S84, the system controller 120 instructs the graphic controller 124 to display a message asking the user whether to manually add a title name to the title detailed information 704. Then, the user selects whether to add a title name manually or automatically. If the selection to manually add the title name is made, the process proceeds to step S87, and if the selection to automatically add the title name is made, the process proceeds to step S85.
[0118]
In step S85, the date, time information, and channel information values obtained in step S82 are converted into character string information that displays the title shown in FIG. Thereby, for example, a character string such as “1999/09/20 (Sunday) 20: 00Ch6” is given as the title name. In step S86, the created title file 304 is recorded in the HDD 119, and the process ends.
[0119]
On the other hand, in step S87, characters that can be input are displayed on the television monitor 126, and the input characters input via the user interface 122 are stored as the title detailed information 704.
FIG. 15 is a flowchart when the title name, that is, the title detailed information 704 is changed.
[0120]
Referring to FIGS. 1 and 15, in step S <b> 91, an instruction to change the title name is input from the outside via the user interface 122. Accordingly, in step S92, the title file 304 held in the HDD 119 is read out and read into the system controller 120.
In step S93, a display for inquiring whether or not to input a title name to the user is displayed on the television monitor 126. If the user manually selects to add a title name, the process proceeds to step S96. If the user selects to automatically add a title name, the process proceeds to step S94.
[0121]
In step S94, the title generation time 712, the last access time 713, the recording time 714, the channel information 715, and the day information 716 shown in FIG. 11 in the title attached information 705 in the title file 304 read in step S92. Convert the necessary part of to the title name. Then, the title name is stored as title detailed information 704.
[0122]
In step S95, the changed title file 304 is recorded in the HDD 119, and the title name change process ends.
On the other hand, in step S96, characters that can be input are displayed on the television monitor 126. Then, the user selects a character from among the characters that can be input and inputs the input character via the user interface 122, and this is stored as the title detailed information 704.
[0123]
FIG. 16 is a flowchart for displaying a list of title names, that is, title detailed information 704.
Referring to FIGS. 1 and 16, in step S <b> 101, a title list display command is input via user interface 122.
Accordingly, in step S102, the title set file 303 stored in the HDD 119 is read into the system controller 120, and the system controller 120 stores the title set file 303 on the memory 121.
[0124]
In step S103, the system controller 120 analyzes the read title set file 303. Thus, it is determined whether or not a title recorded on the HDD 119 exists. If a title exists, the process proceeds to step S104. If no title exists on the hard disk, the process proceeds to step S108.
[0125]
In step S 104, the title file 304 is read from the HDD 119 in accordance with the address indicated by the title descriptor included in the title set file 303 on the memory 121, and the title file 304 is stored on the memory 121.
In step S105, the title detailed information 704 included in the title file 304 obtained in step S104, that is, the title name is added to the title list display list.
[0126]
In step S106, it is determined whether or not the search has been completed for all the title files 304 existing in the title set file 303. If the search is completed, the process proceeds to step S107. If the search has not been completed, the process returns to step S104 and the search is continued.
In step S107, the system controller 120 instructs the graphic controller 124 to draw a list of title names based on the title list for list display generated in step S105. A list of title names is displayed on the television monitor 126.
[0127]
In step S108, the system controller 120 instructs the graphic controller 124 to draw that the recorded title does not exist, and the character string or graphic notifying that the recorded title does not exist is the television monitor 126. Is displayed.
The above is the normal recording / reproducing operation using OPF. In the above description, only the recording / reproducing operation in the HDD 119 has been described, but the same operation is performed when recording / reproducing is performed using a magneto-optical disk (not shown) attached to the MO drive 130.
[0128]
Next, the automatic library creation operation from the HDD 119 to the magneto-optical disk, which is a feature of the present invention, will be described.
In the digital recording / reproducing apparatus of the present invention, the title recorded on the HDD 119 is copied ([COPY]) or moved ([MOVE]) to the magneto-optical disk without bothering the user (magneto-optical disk). (The title is deleted from the HDD 119 after copying to the disk) and the process of confirming whether to copy or move ([confirmation]) (hereinafter referred to as automatic library creation) can be performed.
[0129]
First, FIG. 17 shows a format of library automatic creation information. This information is recorded on each magneto-optical disk. The title name 900 to be stored, the genre 901, the processing information 902 indicating whether the title is copied from the HDD 119 or moved as a library, and the library title. It consists of time stamp information 903 of the title recorded most recently.
[0130]
Next, an input example of the library automatic creation information shown in FIG. 17 is shown in FIG. In the example of FIG. 5A, the title name is [News Station], the genre is [News], and the title is copied from the HDD 119 to the magneto-optical disk. In the example of FIG. 6B, the title name is blank, the genre name is news, and the title is moved from the HDD 119 to the magneto-optical disk (after copying the title from the HDD 119 to the magneto-optical disk, The title is deleted). That is, in the case of FIG. 18 (a), this magneto-optical disk is a library that collects the title [News Station], and in the case of FIG. 18 (b), this magneto-optical disk is a library that collects the genre [News]. It is shown that.
[0131]
In this example, the processing information 902 ([COPY], [MOVE], [Confirmation]) circles the corresponding processing for easy understanding of the explanation, but as information to be recorded on the magneto-optical disk. There are various modes such as providing a flag area corresponding to the above three processes, setting a flag at a desired process, and directly writing a character string corresponding to the process in a predetermined area.
[0132]
Next, the process of writing the library automatic creation information in the magneto-optical disk will be described based on the flowchart of FIG.
First, when a magneto-optical disk that does not store library automatic creation information is loaded into the MO drive 130 (1000: NO), the system controller 120 displays a list of titles in the HDD 119 (1001). Then, from the list of titles, the user selects a title to be stored on the magneto-optical disk as a library (1002). At this time, the system controller 120 first asks the user whether or not to register the name and genre of the selected title as library automatic creation information (1003). If registered (1003: YES), the title name and genre are written on the magneto-optical disk (1004), and finally the title is copied ([COPY]) or moved ([MOVE]). Whether the user is to confirm ([Confirm]) is selected (1007), and the process is terminated.
[0133]
In (1003), if the user selects not to register both the title name and the genre name (1003: NO), the system controller 120 asks the user whether to register only the genre name. Confirm (1005). If registering, write the genre to the magneto-optical disk (1004), and finally, whether the title should be copied ([COPY]) or moved ([MOVE]), or whether the user should confirm ([confirmation] ]) Is selected (1007), and the process is terminated.
[0134]
Further, a process when the title is automatically copied from the HDD 119 to the magneto-optical disk using the library automatic creation information recorded on the magneto-optical disk as described above will be described based on the flowchart of FIG.
First, when a user mounts a library magneto-optical disk on the MO drive 130 (1100), the system controller 120 checks whether or not library automatic creation information is stored in the mounted magneto-optical disk (1101). If it is stored (1101: YES), the information is read into the memory 121.
[0135]
Next, the system controller 120 searches for a title that matches the library automatic creation information read in the HDD 119 (1102). At this time, if the column of title name 900 of the information for automatic library creation is described, the one that matches the title name is searched. If there is no description in the title name column and it is described in the genre name column, the title with the same genre name is searched. At this time, after the latest time stamp information 903 of the information for automatic library creation, A search is made from the recorded titles in the HDD 119. As a result, the title already recorded on the magneto-optical disk can be removed from the candidates, and the search time can be shortened. It is more convenient if information such as title name, genre name, and time stamp information is recorded on the magneto-optical disk using information received by an EPG (Electric Program Guide) or the like.
[0136]
If a corresponding title is found as a result of the search (1102) (1103: YES), the system controller 120 compares the remaining recording time of the library magneto-optical disk with the recording time of the title (1105), If recording is possible (1105: YES), the system controller 120 instructs the HD / MO controller module 118 to copy the title to the magneto-optical disk (1106).
[0137]
After the copy of the title, if the processing information 902 of the library automatic creation information is “Move”, the system controller 120 automatically deletes the title in the HDD 119. If [Confirmation] is displayed, an inquiry as to whether or not to delete the title in the HDD 119 is displayed on the television monitor 126 and a user instruction is given. If it is [Copy], do nothing. At this time, the time stamp information 903 of the library automatic creation information in the magneto-optical disk is also updated (1109).
[0138]
On the other hand, in the above (1105), when the remaining recording time of the library magneto-optical disk is insufficient (1105: NO), the system controller 120 determines whether to replace the new magneto-optical disk and continue the library creation. The inquiry is displayed on the television monitor 126, and the user's instruction is asked (1107). Here, when the user switches to a new magneto-optical disk, the system controller 120 first copies the library automatic creation information of the previously installed magneto-optical disk to the new magneto-optical disk, and then writes the information from the HDD 119 to the optical disk. The title is copied to the magnetic disk (1106).
[0139]
This series of processing is repeated until there is no corresponding title candidate in the search result of (1101).
[0140]
【The invention's effect】
  As described above in detail, according to the present invention, writing and reading of digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal is possible. And writing / reading digital data to / from a detachable second recording medium capable of writing / reading digital data including a video / audio signal and management information corresponding to the video / audio signal. And a predetermined information recorded on the second recording medium, and a digital recording / reproducing apparatus comprising:Among the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,Based on the predetermined information, the first recording medium, Corresponding to digital data written to the first recording medium after the time stamp informationBased on means for searching for management information and the search results,Digital data corresponding to management information including the predetermined information is obtained from the first recording medium.Since the data is read and written to the second recording medium, digital data can be copied from the first recording medium to the second recording medium without bothering the user.
[0141]
  Further, according to the present invention, means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal. And means for writing and reading digital data including a video / audio signal and management information corresponding to the video / audio signal and writing / reading the digital data to / from a detachable second recording medium. In the digital recording / reproducing apparatus, predetermined information recorded on the second recording medium;Among the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,Based on the predetermined information, the first recording medium, Corresponding to digital data written to the first recording medium after the time stamp informationBased on means for searching for management information and the search results,Digital data corresponding to management information including the predetermined information is obtained from the first recording medium.Since the digital data of the first recording medium written to the second recording medium is deleted while being read and written to the second recording medium, the first recording medium is not troubled by the user. The digital data can be copied from the first recording medium to the second recording medium, and the digital data can be automatically deleted from the first recording medium.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of a digital recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a timing chart for explaining a recording operation for one channel of the digital recording / reproducing apparatus shown in FIG. 1;
FIG. 3 is a timing chart for explaining a one-channel playback operation of the digital recording / playback apparatus shown in FIG. 1;
4 is a timing chart for explaining a two-channel simultaneous recording operation of the digital recording / reproducing apparatus shown in FIG. 1; FIG.
FIG. 5 is a timing chart for explaining a chasing playback operation of the digital recording / playback apparatus shown in FIG. 1;
FIG. 6 is a block diagram showing an overall configuration of a simplified player according to an embodiment of the present invention.
FIG. 7 is a diagram schematically illustrating the configuration of a file format used in the present invention.
FIG. 8 is a flowchart for explaining a normal recording operation according to the present invention.
FIG. 9 is a flowchart for explaining a normal reproduction operation according to the present invention.
FIG. 10 is a flowchart illustrating an erase operation according to the present invention.
FIG. 11 is a configuration diagram of management information added as a title file 304 compliant with OPF when a title is generated.
FIG. 12 is a diagram showing a state where a list of titles is displayed.
FIG. 13 is a flowchart of automatic addition of detailed title information 704 when manual recording is performed according to a request from a user.
FIG. 14 is a flowchart of automatic addition of detailed title information 704 when performing scheduled recording.
FIG. 15 is a flowchart when changing a title name, that is, title detailed information 704;
FIG. 16 is a flowchart for displaying a list of title names, that is, title detailed information 704;
FIG. 17 is a diagram schematically showing a format of library automatic creation information in a magneto-optical disk.
FIG. 18 is a diagram illustrating an example of library automatic creation information.
FIG. 19 is a flowchart illustrating processing when creating library automatic creation information.
FIG. 20 is a flowchart illustrating processing such as copying based on library automatic creation information;
[Explanation of symbols]
100, 200 antenna
101, 201 External input terminal
102, 103, 202 Tuner
104,204 selector
105,106 A / D converter
107,108 MPEG2 video encoder
109,110 audio encoder
111 Multiplexer / Demultiplexer
112,212 MPEG2 video decoder
113,213 Audio decoder
114, 214 D / A converter
116, 117, 131 Buffer memory
118 HD / MO controller module
119 HDD
120,220 System controller
121,221 memory
122,222 User interface
124,224 graphic controller
126,226 Television monitor
127 Real-time clock module
128,228 digital input
129 Digital output
130 MO drive
211 Demultiplexer
301 Real-time extent
302 Container information file
303 Title set file
304 Title file

Claims (5)

Means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal, the video and audio signal, and the video and audio signal And a means for writing and reading digital data to and from a detachable second recording medium, and capable of writing and reading digital data including management information corresponding to
Predetermined information recorded on the second recording medium;
Among the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,
Means for searching for management information corresponding to digital data written to the first recording medium after the time stamp information of the first recording medium based on the predetermined information;
A digital recording / reproducing apparatus comprising: reading digital data corresponding to management information including the predetermined information from the first recording medium and writing to the second recording medium based on the search result . Means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal, the video and audio signal, and the video and audio signal And a means for writing and reading digital data to and from a detachable second recording medium, and capable of writing and reading digital data including management information corresponding to
Predetermined information recorded on the second recording medium;
Among the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,
Means for searching for management information corresponding to digital data written to the first recording medium after the time stamp information of the first recording medium based on the predetermined information;
Based on the search result, the digital data corresponding to the management information including the predetermined information is read from the first recording medium and written to the second recording medium, and the first data written to the second recording medium is written. A digital recording / reproducing apparatus, wherein the digital data in the recording medium is deleted. Means for writing and reading digital data to and from a first recording medium capable of writing and reading digital data including a video and audio signal and management information corresponding to the video and audio signal, the video and audio signal, and the video and audio signal And a means for writing and reading digital data to and from a detachable second recording medium, and capable of writing and reading digital data including management information corresponding to
Predetermined information recorded on the second recording medium;
Among the digital data written to the second recording medium based on the predetermined information, the latest digital data time stamp information,
Means for searching for management information corresponding to digital data written to the first recording medium after the time stamp information of the first recording medium based on the predetermined information;
Based on the search result, the digital data corresponding to the management information including the predetermined information is read from the first recording medium, written to the second recording medium, and written to the second recording medium. An inquiry is made as to whether or not to delete the digital data of the recording medium.   4. The digital recording / reproducing apparatus according to claim 1, wherein the predetermined information is a name given to the digital data.   4. The digital recording / reproducing apparatus according to claim 1, wherein the predetermined information is a genre assigned to the digital data.

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