JP2002170322A - Controller and control method for recording and reproducing disk, and recording and playing disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording and reproducing disk controller, a recording and reproducing disk controlling method and a recording and reproducing disk device, by which the recording/reproduction processing of different noncontinuous data can efficiently be performed without breaking off video and audio data while recording/reproducing the video and audio data. SOLUTION: When allowance secured with data pre-read by a DV buffering means 104 according to the present channel is decided to surpass access time to predicted different data in the case a data recording and reproducing managing means 106 requests data access from a channel different from the present channel, pre-read processing or a data write operation by the managing means 106 is interrupted, access is made to newly requested data, and access processing to the different data is performed while there is no disconnection in DV data reproduction while monitoring the pre-reading capacity of the buffering means 104.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing disk control device, a recording / reproducing disk control method, and a recording / reproducing disk device, and more particularly, to a plurality of external devices and a plurality of video / audio data / discontinuous data simultaneously via a digital interface. The present invention relates to an apparatus having a configuration for controlling transmission / reception and input video / audio signals to a disk device such as a hard disk device so that they can be simultaneously recorded and reproduced.

[0002]

2. Description of the Related Art In recent years, disk devices such as a magnetic disk device and an optical disk device have rapidly improved in recording capacity and transfer speed, and have been used for recording and reproducing video and audio data as moving image data. More and more. In particular, the performance of hard disk drives has significantly improved,
2. Description of the Related Art Hard disk devices are used in video servers that store and distribute video and audio data, and in editing machines that edit video and audio data.

[0003] Video and audio data are characterized in that they are continuous data without interruption (hereinafter referred to as stream data) as compared with data such as programs handled by a computer. In other words, during playback, it is necessary to read stream data from the disk without interruption so that the stream data can be output to the outside at regular intervals, and during recording, it is necessary to write stream data input from outside at constant intervals to the disk without interruption. .

[0004]

The conventional disk drive is configured as described above, and records and audio / video data.
If you attempt to execute recording / playback processing of different video / audio data or non-continuous data during reproduction, the video / audio data will be There is a problem that a frame drop occurs.

Further, if a large margin is provided for recording / reproducing video / audio data so that the above-mentioned frame drop does not occur, there is a problem that the responsiveness of another non-continuous data recording / reproducing process deteriorates. .

In accessing the disk device, accessing the disk as continuously as possible rather than switching data at different addresses in a short span can effectively use the cache system in the disk device, thereby improving the overall throughput. However, if the recording / playback processing of the video / audio data is performed immediately after the recording / playback processing of another discontinuous data, as described above, if the vacant time after access is large, the processing shifts to the prefetching and recording of the stream. As a result, there is also a problem that the seek in the disk device frequently occurs and the efficiency is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. During recording and reproduction of video and audio data, the recording and reproduction of another non-continuous data without interrupting the video and audio data. An object of the present invention is to provide a recording / reproducing disk control device, a recording / reproducing disk control method, and a recording / reproducing disk device that can efficiently execute a reproducing process.

[0008]

According to a first aspect of the present invention, there is provided a recording / reproducing disk control device comprising a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices. A recording / reproducing disk control device for controlling, comprising: input / output buffer means for temporarily storing externally input data or data read from the storage device; and another video signal during reproduction of the video / audio data. When a request for reproducing or recording audio data or non-continuous data is received, if the video / audio data being reproduced is prefetched and stored by a predetermined amount in the input / output buffer means, the reproduction / recording request is received. Data recording / reproducing management means for controlling the reproduction and recording operations of another video / audio data or discontinuous data.

According to a second aspect of the present invention, there is provided the recording / reproducing disk control device according to the first aspect, wherein the video / audio data is reproduced while the video / audio data is being reproduced. When a reproduction / recording request is received, the data recording / reproduction management means interrupts the pre-reading process of the video / audio data, and then performs reproduction / recording operation of another video / audio data or discontinuous data, and performs the video / video reproduction again. Processing time storing means for storing the time required until the pre-reading processing of the audio data is restarted, wherein the data recording / reproducing management means performs pre-reading of the reproduced data based on the time stored in the processing time storing means. Playback of other video / audio data or non-video / audio data from processing,
The timing for switching to the recording operation is changed.

According to a third aspect of the present invention, there is provided the recording / reproducing disk control device according to the first aspect, wherein the non-continuous data reproduction / recording request is issued while the video / audio data is being reproduced. And a processing time predicting means for predicting a processing time required to perform a read / write operation of another piece of the discontinuous data by interrupting a prefetching process of the video / audio data when receiving the data. The management means is obtained from the read-ahead amount of the reproduced video / audio data stored in the input / output buffer means when a reproduction / recording request of another discontinuous data is received while the video / audio data is actually being reproduced. If the spare time for performing the continuous reproduction of the video and audio data exceeds the predicted time obtained from the processing time prediction means, the reproduction and recording of the other non-continuous data is performed. And controls to perform.

According to a fourth aspect of the present invention, there is provided a recording / reproducing disk control device, wherein the data recording / reproducing management means comprises:
When the pre-reading of the video and audio data is interrupted during the reproduction of the video and audio data and the reproduction and recording processing of another video and audio data or discontinuous data is performed, and the pre-reading amount becomes a certain amount or less, The prefetching process of the other video / audio data or the reproduction / recording process of the discontinuous data is interrupted, and the prefetching process of the video / audio data is restarted.

According to a fifth aspect of the present invention, there is provided a recording / reproducing disk control device, wherein the data recording / reproducing management means comprises:
When the pre-reading of the video and audio data is interrupted while the video and audio data is being reproduced and another video and audio data or non-continuous data is being reproduced and recorded, a break is obtained from the pre-reading amount of the video and audio data. It is expected that there will be extra time to play back the video and audio data without the gap, and it will be necessary to interrupt the reproduction and recording of the other video and audio data or the discontinuous data and restart the prefetching of the video and audio data. When the time is shorter than the time, the prefetching process of the other video / audio data or the reproduction / recording process of the discontinuous data is interrupted, and the prefetching process of the video / audio data is restarted.

According to a sixth aspect of the present invention, there is provided a recording / reproducing disk control device for controlling a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices. A disk control device, comprising: input / output buffer means for temporarily storing data input from the outside or data read from the storage device; and another video while recording the video / audio data in the storage device. Playback of audio data or discontinuous data,
When a recording request is received, the input / output buffer means
If the amount of video / audio data being recorded that has not been written to the storage device does not exceed a certain amount, the reproduction / recording operation of the another video / audio data or the discontinuous data that has received the reproduction / recording request is performed. Data recording / reproducing management means for performing the control as described above.

According to a seventh aspect of the present invention, there is provided the recording / reproducing disk control device according to the sixth aspect, wherein the video / audio data is recorded while another video / audio data or non-continuous data is reproduced. When a recording request is received, the data recording / reproducing management unit stores the video / audio data stored in the input / output buffer unit.
After the interruption of the writing process to the disk device, the reproduction and recording operations of the another video / audio data or the discontinuous data are performed, and the time required until the recording process of the video / audio data is restarted is accumulated. Processing time accumulating means, wherein the data recording / reproducing managing means is provided with a buffer space for processing another video / audio data or discontinuous data obtained from the video / audio data amount which can be stored in the input / output buffer means. Based on the spare time based on the capacity and the time accumulated in the processing time accumulating means, the processing of writing the video / audio data stored in the input / output buffer means to the disk device is performed according to the requested another. The timing for switching to the reproduction / recording operation of the video / audio data or the non-video / audio data is changed.

According to a eighth aspect of the present invention, there is provided the recording / reproducing disc control device according to the sixth aspect, wherein the recording / reproducing disc control device issues a request for reproducing / recording another piece of discontinuous data while recording video / audio data. When receiving the data, the data recording / reproducing management means interrupts the processing of writing the video / audio data stored in the input / output buffer means to the disk device to perform the reproduction / recording operation of the other discontinuous data. The processing time prediction means for predicting the processing time required for, the data recording and reproduction management means, while actually recording the video and audio data, the reproduction of the other non-continuous data,
When a recording request is received, a margin time based on the free space of a buffer for recording and reproducing another discontinuous data, which is obtained from the video / audio data amount that can be stored in the input / output buffer means, is set to the above processing time. If the estimated time obtained by the time estimating means is exceeded, control is performed so as to perform the reproduction and recording operations of the above-mentioned other discontinuous data.

According to a ninth aspect of the present invention, in the recording / reproducing disk control device according to the seventh aspect, the data recording / reproducing management means includes:
When the process of writing the video / audio data stored in the input / output buffer means to the disk device while recording the video / audio data is interrupted to perform another video / audio data or non-continuous data reproduction / recording process On the other hand, when the margin time based on the free space of the buffer for recording and reproducing another discontinuous data obtained from the video / audio data amount that can be stored in the input / output buffer means becomes a certain amount or less, The pre-reading process of the other video / audio data or the reproduction / recording process of the discontinuous data is interrupted, and the writing process of the video / audio data stored in the input / output buffer means to the disk device is restarted.

According to a tenth aspect of the present invention, there is provided the recording / reproducing disk control device according to the eighth aspect, wherein the data recording / reproducing management unit is configured to control the input / output buffer while recording audio / video data. When the process of writing the video / audio data stored in the means to the disk device is interrupted and the reproduction / recording process of another video / audio data or discontinuous data is being performed, the data can be stored in the input / output buffer means. The spare time based on the free space of the buffer for recording / reproducing another non-continuous data obtained from the video / audio data amount is interrupted by reproducing / recording another video / audio data or non-continuous data, and If the time required for resuming the process of writing audio data to the disk device becomes shorter than the expected time, Playback of pre-read process or non-contiguous data voice data, to interrupt the recording process, it is to resume the writing process to the disk device of the video audio data accumulated in the output buffer means.

According to a eleventh aspect of the present invention, there is provided a recording / reproducing disk controller according to any one of the first to tenth aspects, wherein the disk is a magnetic disk.

According to a twelfth aspect of the present invention, there is provided a recording / reproducing disk controller according to any one of the first to tenth aspects, wherein the disk is a magneto-optical disk.

According to a thirteenth aspect of the present invention, there is provided a recording / reproducing disk control method for controlling a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices. A disk control method, wherein externally input data or data read from the storage device is temporarily stored in an input / output buffer means; and A step of detecting that a request for reproducing or recording video / audio data or discontinuous data has been received, and detecting whether or not a predetermined amount of video / audio data being reproduced has been prefetched and accumulated in the input / output buffer means. And if the input / output buffer means detects that the video / audio data being reproduced has been read ahead and accumulated by a certain amount,
Switching from the pre-reading processing of the reproduction data to the reproduction and recording operation of another video / audio data or non-continuous data which has received the above-mentioned reproduction and recording request.

According to a fourteenth aspect of the present invention, there is provided the recording / reproducing disk control method according to the thirteenth aspect, wherein when the video / audio data is being reproduced, another video / audio data or non- After receiving a request for reproduction and recording of continuous data, the prefetching process of the video and audio data is interrupted, the reproduction and recording operation of another video and audio data or non-continuous data is performed, and the prefetching process of the video and audio data is restarted again. It further includes a step of accumulating the time required until, based on the time accumulated in the above steps,
This is to change the timing of switching from the pre-reading processing of the reproduction data to the reproduction and recording operation of another video / audio data or non-video / audio data.

According to a fifteenth aspect of the present invention, in the recording / reproducing disk control method according to the thirteenth aspect, when the video / audio data is reproduced, another non-continuous data of the non-continuous data is reproduced. A step of interrupting the pre-reading process of the video and audio data in response to the reproduction and recording request and estimating the processing time required for performing the reproduction and recording operation of the above-mentioned non-continuous data, and actually reproducing the video and audio data When the reproduction and recording request of another discontinuous data is received during the reproduction, the continuous reproduction of the video and audio data obtained from the pre-read amount of the reproduced video and audio data stored in the input / output buffer means. If the extra time for performing the process exceeds the expected time obtained from the process of estimating the processing time, a process for controlling the reproduction and recording operations of the other discontinuous data is performed. And, it is intended to include.

According to a sixteenth aspect of the present invention, there is provided the recording / reproducing disk control method according to the thirteenth aspect, wherein the pre-reading of the video / audio data is interrupted while the video / audio data is being reproduced. A step of detecting that the pre-reading amount has become equal to or less than a certain amount during reproduction and recording of video / audio data or non-continuous data; Suspending the pre-reading process or the reproduction and recording process of the non-continuous data, and restarting the pre-reading process of the video and audio data.

According to a seventeenth aspect of the present invention, there is provided the recording / reproducing disk control method according to the fifteenth aspect, wherein the pre-reading of the video / audio data is interrupted while the video / audio data is being reproduced. When performing playback / recording processing of video / audio data or non-continuous data of another video / audio data or non-continuous data, the extra time for reproducing video / audio data without interruption, A step of detecting that the playback time of the continuous data is interrupted and restarting the pre-reading process of the video / audio data and detecting that the time is shorter than an expected time, and the margin time is smaller than the expected time. If it is detected that the video and audio data have been read out, the pre-reading process of the other video / audio data or the reproduction / recording process of the discontinuous data is interrupted, and the video / audio A step resume pre-read process of the data, is intended to include.

A recording / reproducing disk control method according to claim 18 of the present invention is a recording / reproducing method for controlling a storage device for simultaneously transmitting and receiving a plurality of signals, video / audio data and discontinuous data to / from a plurality of external devices. A disk control method, comprising: a step of temporarily storing externally input data or data read from the storage device in an input / output buffer means; and Or, a step of detecting that a request for reproducing or recording discontinuous data has been received, and whether or not the input / output buffer means has stored a certain amount of video / audio data being recorded that has not been written to the disk device. And storing in the input / output buffer means an amount of video / audio data being recorded that has not been written to the disk device exceeding a certain amount. When it is detected that it is not,
Switching from the video / audio data writing process to the reproduction / recording operation of the other video / audio data or discontinuous data.

According to a nineteenth aspect of the present invention, in the recording and reproducing disk control method according to the eighteenth aspect, while reproducing the video and audio data, another video and audio data or discontinuous data is reproduced. After receiving the recording request, the writing process of the video / audio data stored in the input / output buffer unit to the disk device is interrupted, and another video / audio data or non-continuous data is reproduced and recorded. The method further includes the step of accumulating the time required until the recording processing of the video / audio data is restarted, and obtaining another video / audio data or non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means. Based on the spare time based on the free capacity of the buffer for processing and the time accumulated in From the write processing to the disk device of the video audio data accumulated in § means, reproduction of the requested separate video and audio data or non-video audio data, and changes the timing for switching the recording operation.

According to a twentieth aspect of the present invention, there is provided the recording / reproducing disk control method according to the eighteenth aspect, wherein a request for reproducing / recording another piece of discontinuous data during recording of video / audio data is provided. If the received data is received, the processing time required for interrupting the processing of writing the video / audio data stored in the input / output buffer means to the disk device and performing another non-continuous data reproduction / recording operation is reduced. In the process of predicting, and when receiving a request to reproduce and record another discontinuous data while actually recording video and audio data,
A margin time obtained from the amount of video / audio data that can be stored in the input / output buffer means, based on the free space of a buffer for processing another video / audio data or discontinuous data, is obtained from the step of predicting the processing time. And controlling to perform the reproduction and recording operations of the other non-continuous data if the estimated time has passed.

According to a twenty-first aspect of the present invention, there is provided the recording / reproducing disk control method according to the eighteenth aspect, wherein the video and audio data stored in the input / output buffer means during recording of audio / video data. When the process of writing the audio data to the disk device is interrupted and another video / audio data or non-continuous data is being reproduced and recorded, the video / audio data amount that can be stored in the input / output buffer means is obtained. Detecting that the margin time based on the free space of the buffer for processing another video / audio data or non-continuous data has become a certain amount or less, and receiving the above detection result, The video / audio stored in the input / output buffer means is interrupted by prefetching data or reproducing / recording discontinuous data. A step resumes writing process to the disk device over data, it is intended to include.

The recording / reproducing disc control method according to claim 22 of the present invention is the recording / reproducing disc controlling method according to claim 20, wherein the video and audio data stored in the input / output buffer means during recording are stored. When the process of writing the audio data to the disk device is interrupted and another video / audio data or non-continuous data is being reproduced and recorded, the video / audio data amount that can be stored in the input / output buffer means is obtained. The spare time based on the free space of the buffer for processing another video / audio data or non-continuous data is interrupted by interrupting the reproduction / recording process of another video / audio data or non-continuous data. When the time required to resume the writing process to the device becomes shorter than the estimated time, Pre-read process or non-continuous data reproduction, to interrupt the recording process, is intended to include step resumes writing process to the disk device of the video audio data accumulated in the output buffer means.

Further, the recording / reproducing disk device according to claim 23 of the present invention is capable of transmitting signals,
What is claimed is: 1. A recording / reproducing disk device comprising a recording / reproducing disk control device for controlling a storage device for simultaneously transmitting and receiving a plurality of video / audio data and non-continuous data, wherein said recording / reproducing disk control device comprises: An input / output buffer means for temporarily storing data read from a storage device; and, when a request for reproducing or recording another video / audio data or discontinuous data is received during reproduction of the video / audio data, the input / output When a certain amount of video / audio data being reproduced has been pre-read and stored in the buffer means, control is performed so as to perform the reproduction / recording operation of another video / audio data or discontinuous data which has received the above reproduction / recording request. Data recording / reproduction management means.

Further, the recording / reproducing disk device according to the twenty-fourth aspect of the present invention is capable of transmitting a signal,
What is claimed is: 1. A recording / reproducing disk device comprising a recording / reproducing disk control device for controlling a storage device for simultaneously transmitting and receiving a plurality of video / audio data and non-continuous data, wherein said recording / reproducing disk control device comprises: Input / output buffer means for temporarily storing data read from a storage device, and when recording the video / audio data in the storage device, receiving another video / audio data or non-continuous data reproduction / recording request. In the input / output buffer means, when the amount of video / audio data being recorded that has not been written to the storage device does not exceed a certain amount, the reproduction / recording request of another video / audio data or non-continuous data received Data recording / reproducing management means for performing control to perform reproducing / recording operations.

[0032]

(Embodiment 1) FIG. 1 is a block diagram for explaining a configuration of a recording / reproducing disk control device according to Embodiment 1 of the present invention. As shown in FIG. 1, the disk control device 100 according to the first embodiment includes a video / audio signal P / P from an external device such as a digital VCR or a PC.
An IEEE 1394 bus 101 for transferring C content signals and control signals (commands); external interface means 102 for transmitting and receiving digital signals to and from external devices via the IEEE 1394 bus 101; When a recording start request for video / audio data (hereinafter abbreviated as DV data) is received, the DV received from an external device (not shown)
Input / output DV buffer means 104 for storing data
A video / audio data management unit 103 for issuing a DV data storage request to the data recording / reproduction management unit 106;
File system management means 109 for managing the position of the data on the external disk device 107, and PC content data received from an external device when the external interface means 102 receives a PC content recording request (hereinafter referred to as non-continuous data). , PC data), an input / output PC buffer means 105 for storing
The DV data on the V buffer means 104 is recorded on the external disk device 107, and the DV data from the external disk device 107
The data is reproduced, and P
Data recording / reproduction management means 106 for recording C data on the disk device 107 and extracting PC data from the external disk device 107; and PC data management means 1 for issuing a PC data storage request to the data recording / reproduction management means 106
08 and file system management means 109 for managing the position of the PC data on the disk device 107.

In the disk controller 100, a hard disk device (HDD) having an IDE interface is used as the external disk device 107. It is assumed that the recording area of the hard disk device is managed in sector units with 512 bytes as one sector, and a logical block address (LBA) is assigned to each sector.

FIG. 2 is a diagram for explaining the structure of the data area in the present disk device. FIG. 2 is a diagram showing an example of a data area when a magnetic disk such as a hard disk is used as a disk device. The data area is composed of one disk surface, and LBAs are allocated from the outer periphery to the inner periphery. I do. The disc 1 shown in FIG. 2 is provided with a DV data area 3 for recording DV data and a DV data management area 2 for recording recording management information for the DV data. A PC data area 4 is provided for recording and managing data.

In the DV data area 3, video and audio data are recorded, and addresses are assigned from 0 in the smallest data unit from the outermost peripheral portion. That is, when the video / audio data is DV data, the minimum data unit is handled as a frame unit. In the first embodiment, the minimum data unit is 235 sectors.

FIG. 3 is a list of recording management information recorded in the DV data management area 2 according to the first embodiment. As shown in FIG. 3, as the recording management information, a recording start frame address indicating the position where the next DV data to be recorded is stored, a reproduction start frame address indicating the position where the next DV data to be reproduced is stored, There are a final recording frame address indicating the final position of the recorded DV data, and a total recordable frame number indicating the number of frames recordable on the disk device.

FIG. 4 shows the D recorded on the disk device.
FIG. 4 is a diagram for explaining the structure of V data, area management information, and PC data. As shown in FIG. 4, the head area (area with a small LBA) of the disk recordable area of the disk device 107 is allocated to the DV data recording management information and the video / audio recordable area, and the rest is used as the PC content area as the PC data area. Is allocated as a recording area.
The DV data recordable area is assigned a frame address (FA) in order from 0 in units of DV data frames, and is played back in this order during playback.

Next, the operation of the disk control device will be described. The operation of the disk control device of the first embodiment includes a DV data recording processing operation, a DV data reproduction processing operation, a PC data recording processing operation, a PC data reproduction processing operation, and a PC data recording / reproduction request during the DV data recording processing. Operation when receiving, and PC during DV data playback processing
The operations performed when a data recording / reproducing request is received can be roughly divided into the above six operations. Hereinafter, those six operations will be sequentially described.

[DV Data Recording Processing] First, the recording processing operation of DV data will be described. In FIG. 1, the external interface means 102 is composed of a PHY circuit for performing interface control of a physical layer, a LINK circuit for performing interface control of a logical layer, and the like. A DV data recording start request is sent to the management unit 103, and the DV data received from the external device is transmitted to the input / output DV buffer unit 1.
04.

The video / audio data management means 103 which has received the DV data recording start request sends a DV data recording start request to the input / output DV buffer means 104 and the data recording / reproduction management means 106. When receiving the recording end notification from the data recording / reproducing management unit 106, the video / audio data management unit 103 sends a recording end notification to the external interface unit 102, and transmits the DV data received from the external device to the input / output DV buffer unit 104. The transfer process ends.

FIG. 5 is a diagram for explaining in detail the operation of the input / output DV buffer means 104 when recording DV data. As shown in FIG. 5, the input / output DV buffer unit 104 that has received the DV data recording start request stores the DV data in the buffer position indicated by the ISO capture pointer. After storing the DV data, the ISO capture pointer is incremented to point to the next buffer. At that time,
If so, return the ISO capture pointer to the top position. DV data is transmitted without interruption at a constant speed of 28.8 Mbps. Since about 30 frames / sec, it takes about 33 ms to transfer one frame.

The data recording / reproducing management means 106 which has received the DV data recording start request indicates, as shown in FIG. 5, the buffer in which the ISO fetch pointer and the IDE fetch pointer in the input / output DV buffer means 104 are the same. If not, it is determined that there is DV data not stored in the disk device 107, and a next recording LBA extraction request is issued to the file system management means 109, and the DV data area of the disk device 107 indicated by the obtained LBA information is The DV data on the buffer indicated by the IDE fetch pointer of the input / output DV buffer means 104 is recorded in a predetermined procedure. At this time, upon receiving the end notification, the recording / reception notice is sent to the video / audio data management means 103, and all the DV data in the input / output DV buffer management means 104 is written to the disk device, thereby ending the DV data recording processing. On the other hand, if the DV data on the buffer indicated by the IDE fetch pointer is not the end, the IDE fetch pointer is incremented to indicate the next buffer. Return to the position shown.

At this time, the DV data is transmitted from the external interface means 102 at a constant interval (about 3 in the case of DV data).
(Every 3 ms), but the data recording / reproducing management means 106 records the DV data on the disk device 107 only when the disk device 107 is ready to receive data. It takes about 8ms to write to HDD.

In the normal state, the writing to the disk device 107 is considerably faster than the transfer speed of the DV data sent from the external interface means 102, so that the data stored in the input / output DV buffer means 104
The data not transferred to the disk device 107 in the V data is 0 or 1, and the recording of the DV data is missing.
This is a case where the transfer to the disk device 107 is delayed until the size of the buffer in the input / output DV buffer unit 104 becomes full.

For example, if the buffer in the input / output DV buffer means 104 has a capacity of 11 frames,
A margin of about 0.3 seconds occurs at × 33 ms, and the seek time and the retry processing time at the time of a write error occurring in the disk device 107 can be absorbed by this time. However, if random access occurs to all of the 10 frames or if some retry processing occurs, a situation may occur in which the DV data cannot be stored in the disk device.

Next, the file system management means 109
The detailed operation when receiving the next recording LBA removal request will be described with reference to FIG. FIG. 7 shows the first embodiment.
FIG. 7 is a diagram illustrating a flowchart for describing a next recording LBA calculation method at the time of DV data recording according to the first embodiment.
In FIG. 7, when it is determined in step S1 that the recording start frame address is larger than the total number of recordable frames, it is determined that the recording is in the full recording state, and the end of recording is notified to the data recording / reproduction management means 106 to execute the processing. finish. on the other hand,
If it is determined that the recording start frame address has not reached the total number of recordable frames, the process proceeds to step S2.

If the recording start frame address is larger than the final recording frame address in step S2, DV data is recorded as an additional recording mode, and step S3
Increases the last recording frame address by one. Otherwise, the process proceeds to step S4 as the overwriting recording mode. In step S4, the recording start frame address is converted into an LBA and returned to the data recording / reproducing management means 106. In step S5, the recording start frame address is incremented by one.

[DV Data Reproduction Processing] Next, the reproduction processing operation of DV data will be described. The external interface means 102 transmits the DV signal from the IEEE 1394 bus 101
When a data reproduction start request is received, a DV data reproduction start request is issued to the video / audio data management unit 103. D
The video / audio data management unit 103 that has received the V data reproduction start request sends a DV data reproduction start request to the input / output DV buffer unit 104 and the data recording / reproduction management unit 106. The data recording / reproducing management means 106
07, the DV data is transferred to the input / output DV buffer 104, and the external interface 102 sequentially transmits the DV data to the external device via the IEEE1394 bus 101.

FIG. 6 is a diagram for explaining in detail the operation of the input / output DV buffer means 104 when reproducing DV data. As shown in FIG. 6, upon receiving the DV data reproduction start request, the data recording / reproduction management unit 106 sends a next reproduction LBA extraction request to the file system management unit 109, and the DV data of the disk device 107 indicated by the obtained LBA information. DV data is read out from the area and stored in a buffer indicated by the IDE fetch pointer of the input / output DV buffer means 104 according to a predetermined procedure. At that time, the IDE capture pointer is incremented to indicate the next buffer, but if it exceeds the buffer, the IDE capture pointer is returned to the position indicating the highest buffer. The data recording / reproducing management means 106 performs the above operation as much as possible as long as there is a free space in the buffer of the input / output DV buffer means 104, and prefetches the DV data from the disk device. Here, ID
If the E fetch pointer and the ISO fetch pointer indicate the same buffer, it is determined that there is no free space in the buffer.

In the DV data reproduction, the DV data is sent from the external interface means 102 to the IEEE 1394 bus at regular intervals (about 33 ms in the case of DV data). Reading is performed when the disk device 107 is ready to receive data. Reading one frame of data from the disk device is performed using the HDD.
If the LBA is continuous and the prefetch cache is valid, about 8 ms is required. If the cache is invalid, the seek time is added. In the normal state, since the reading from the disk device is considerably faster than the transfer speed of the DV data sent from the external interface means 102, the input / output DV
The data which is not transferred to the external interface means 102 in the buffer data of the buffer means 104 is fully read ahead in the buffer, and the lack of reproduction of the DV data is caused by the fact that the DV data of the buffer of the input / output DV buffer means 104 is lost. This is a case where the reading from the disk device 107 is delayed until the disk becomes empty.

For example, if the buffer of the input / output DV buffer means 104 has a capacity of 11 frames, 10 × 3
A margin of about 0.3 seconds occurs in 3 ms, and this time can absorb a seek time generated in the disk device 107 and a retry processing time at the time of a read error. However, if random access occurs in all 10 frames or if some retry processing occurs, DV
A situation where data cannot be read from the disk device may occur.

When the data recording / reproducing management unit 106 that has issued the next reproduction LBA removal request receives the non-recording notification or the end notification, it issues a reproduction end request to the video / audio data management unit 103 to execute the DV data reproduction processing. finish.

As shown in FIG. 6, upon receiving the DV data reproduction start request, the input / output DV buffer 104
If the O fetch pointer indicates a buffer different from the IDE fetch pointer, it is determined that the DV data not transmitted to the outside is in the buffer, and the DV data of the buffer indicated by the ISO fetch pointer is sent to the external interface means 102. If you transfer and indicate the same position,
Judging that the DV data is fetched from the disk device 107 is delayed,
The V data is transferred to the external interface means 102. However, since the positions of the two pointers are the same at the start of reproduction, the transmission to the external interface means 102 is started after the DV data is stored in the buffer of the input / output DV buffer means 104.

When the external interface unit 102 transmits the DV data to the IEEE 1394 bus 101, the ISO fetch pointer of the input / output DV buffer unit 104 is incremented to indicate the next buffer. At that time, if the data exceeds the buffer, the ISO fetch pointer is returned to the highest position.

Next, the file system management means 109
Will be described in detail with reference to FIG. 8 when a next reproduction LBA take-out request is received. FIG. 8 is a diagram illustrating a flowchart for describing a next reproduction LBA calculation method at the time of reproducing DV data.

If the last recorded frame address is -1 in step S10, it is determined that the data has not been recorded, the data recording / reproduction management means 106 is notified of the non-recording, and the processing is terminated. On the other hand, if it is determined in step S10 that the state is not an unrecorded state, the process proceeds to step S11. If the reproduction start frame address is larger than the last recording frame address in step S11, it is determined that the end of the recording has been reached, and the end is notified to the data recording / reproduction management means 106, and the processing is terminated.

In step S11, if the reproduction start frame address is smaller than the last recording frame address and it is not determined that the end of the recording has been reached,
Proceeding to step S12, the reproduction start frame address is converted to LBA and returned to the data recording / reproduction management means 106. Further, in step S13, the reproduction start frame address is incremented by one. The above processing is performed, and the flow ends.

[PC Data Recording Process] Next, the PC data recording process operation will be described. In FIG. 1, when an external interface unit 102 receives a PC data recording request from an external personal computer,
A PC data recording request is sent to the data management unit 108.

The PC data management means 108 having received the PC data recording request sends a PC data recording request to the input / output PC buffer means 105 and the data recording / reproduction management means 106. Further, upon receiving the recording end notification from the data recording / reproducing management unit 106, the PC data management unit 108 sends a recording end notification to the external interface unit 102,
The PC data recording process ends.

The input / output P receiving the PC data recording request
The C buffer means 105 is the external interface means 1
02 receives the PC data and stores it in the buffer.
The data recording / reproducing management unit 106 that has received the PC data recording request receives the number of sectors of the PC data to be recorded and the LBA from the PC data management unit 108. L obtained
The PC data in the buffer of the input / output PC buffer means 105 is recorded in the PC data area of the disk device 107 indicated by the BA information in a predetermined procedure. After that, a recording end notification is sent to the PC data management means 108.

[PC Data Reproduction Processing] Next, the operation of the reproduction processing of the PC data will be described. The external interface unit 102 is connected from the IEEE 1394 bus 101 to the PC.
When a data reproduction request is received, the PC data management means 1
08, a PC data reproduction request is issued. Upon receiving the PC data reproduction request, the PC data management means 108 receives the input / output PC buffer means 105 and the data recording / reproduction management means 10.
6 and a PC data reproduction request.

Then, the data recording / reproducing management means 106 which has received the PC data reproducing request,
8, the number of sectors of the PC data to be read and the LBA are received. The PC data is read out from the PC data area of the disk device 107 indicated by the obtained LBA information and stored in a buffer of the input / output PC buffer means 105 in a predetermined procedure. After that, a reproduction end request is issued to the external interface means 102, and the PC data reproduction processing ends.

Input / output P receiving PC data reproduction request
The C buffer means 105 is a data recording / reproducing management means 10
6 is transferred to the external interface means 102, and the external interface means 102 transmits the PC data to the IEEE 1394 bus 101.

[Operation When PC Data Recording / Reproduction Request Is Received During DV Data Recording Processing] Next, the operation when PC data recording / reproduction request is received during DV data recording processing will be described. In FIG. 1, during a DV data recording process, a PC data recording request or P
When the C data reproduction request is issued, the external interface unit 102 sends a PC data recording / reproduction inquiry request to the PC data management unit 108.

The PC data management means 108 having received the PC data recording / reproducing inquiry request sends a PC data recording / reproducing inquiry request to the data recording / reproduction managing means 106. The data recording / reproducing management unit 106 that has received the PC data recording / reproducing inquiry request receives the number of sectors and the LBA of the PC data to be recorded / reproduced from the PC data managing unit 108.

The detailed operation when the data recording / reproducing management means 106 receives a PC data recording / reproducing inquiry request during recording of DV data will be described with reference to FIG. FIG. 9 is a diagram illustrating a flowchart for describing the recording / reproducing processing of PC data at the time of recording DV data. In step S20, the input / output D shown in FIG.
If there is not a certain amount of free buffer in the buffer of the V buffer means 104, the process proceeds to step S21, where the data recording / reproducing management means 106 continues the process of writing DV data to the disk device 107, and returns to step S20. In the first embodiment, when there is an empty buffer capable of storing 10 or more DV data, that is, 3 times at 10 times 33 ms.
When there is a margin of 30 ms or more, the processing shifts to the recording / reproducing processing of the PC data.

If it is determined in step S20 that there is room in the DV data, the process proceeds to step S22, where the data recording / reproducing management means 106 sends the data to the disk device 107.
The writing process of V data is interrupted. Further, the process proceeds to step S23, where the PC data recording process or the PC data reproduction process is performed by the above-described method. Further, the process proceeds to step S24, and when it is determined that there is no fixed amount of free buffer in the buffer of the input / output DV buffer unit 104 (there is no room for the DV data), the process proceeds to step S25, and the data recording / reproducing management unit Disk device 1 at 106
Then, the process of writing DV data to 07 is resumed, a recording / reproduction end notification is sent to the PC data management unit 108, and this process ends. Here, this processing is terminated when there is no free buffer capable of storing five or more DV data, that is, when there is no margin of 165 ms or more, which is five times 33 ms.

In step S24, if the DV data has a margin, that is, if the free buffer is equal to or more than the predetermined amount,
Proceeding to step S26, if it is determined that there is a PC data recording / reproducing inquiry request different from the PC data processed in step S23, the process proceeds to step S23, and steps S23 to S26 are performed. Is repeated, or steps S23 to S
25 is performed. On the other hand, if it is determined in step S26 that there is no new request, the process proceeds to step S26.
24, and repeat the processing of step S24 and step S26, or execute step S24 and step S2.
Step 5 is performed.

Recording / reproduction from the data recording / reproduction management means 106
The PC data management unit 108 that has received the reproduction end notification sends a recording / reproduction end notification to the input / output PC buffer unit 105 and the external interface unit 102. At this time, the external interface unit 102 performs a completion process if the PC data recording process is being performed, and outputs the input / output PC buffer unit 10 to the external personal computer if the PC data reproduction process is being performed.
Data read from the disk drive in IEEE
The data is sent to the 1394 bus 101 to perform the completion processing.

[Operation When Receiving PC Data Recording / Reproduction Request During DV Data Reproduction Processing] Next, the operation when receiving a PC data recording / reproduction request during DV data reproduction processing will be described. In FIG. 1, when a PC data recording request or a PC data reproduction request is issued from an external personal computer to the external interface means 102 during the DV data reproduction processing, the external interface means 102 PC
Sends a data recording / reproducing inquiry request.

The PC data management means 108 which has received the PC data recording / reproducing inquiry request sends a PC data recording / reproducing inquiry request to the data recording / reproduction managing means 106. The data recording / reproducing management unit 106 that has received the PC data recording / reproducing inquiry request receives the number of sectors and the LBA of the PC data to be recorded / reproduced from the PC data managing unit 108.

The detailed operation when the data recording / reproducing management means 106 receives a PC data recording / reproducing inquiry request during the reproduction of DV data will be described with reference to FIG.
FIG. 10 is a diagram illustrating a flowchart for describing recording / reproducing processing of PC data at the time of reproducing DV data. In step S30, as shown in FIG. 6, when there is no fixed amount of pre-read DV data in the buffer of the input / output DV buffer means 104, it is determined that there is no room in the DV data, and the process proceeds to step S31. The recording / reproducing management means 106 continues the process of pre-reading the DV data from the disk device 107, and then returns to step S3.
Return to 0. Here, when 10 or more DV data are pre-read and stored in the buffer, that is, when there is a margin of 330 ms or more, which is 10 times 33 ms, the processing shifts to the recording / reproducing process of PC data.

In the following step S32, the data recording / reproducing management means 106 interrupts the process of pre-reading the DV data from the disk device 107. Next, in step S33, the PC data recording process or the PC
Perform data reproduction processing. In the following step S34, if it is determined that there is no fixed amount of pre-read DV data in the buffer of the input / output DV buffer means 104, the process proceeds to step S34.
Proceeding to 35, the data recording / reproduction management means 106 restarts the process of pre-reading the DV data from the disk device 107, sends a recording / reproduction end notification to the PC data management means 108, and ends this processing. Here, this processing is terminated when five or more pieces of DV data are not pre-read and stored in the buffer, that is, when there is no margin of 165 ms or more, which is five times 33 ms.

On the other hand, if it is determined in step S34 that a fixed amount of pre-read DV data exists in the buffer of the input / output DV buffer means 104, the process proceeds to step S36. Then, the P processed in step S33
If there is a PC data recording / playback inquiry request different from the C data, the process proceeds to step S33. If there is no new request, the process proceeds to step S34.

The data recording / reproducing management means 106
The PC data management means 108 which has received the reproduction end notification sends a recording / reproduction end notification to the input / output PC buffer means 105 and the external interface means 102. At this time, the external interface unit 102 performs the completion process if the PC data recording process is being performed, and performs the completion process by transferring the data read from the disk device to the external personal computer if the PC data reproduction process is being performed.

As described above, according to the first embodiment, when the data recording / reproducing management unit 106 receives a data access request from a channel different from the current channel, the DV buffer 104 is transmitted to the DV buffer unit 104 by the current channel. If it is determined that the margin time secured by the pre-read data exceeds the expected access time to another data, the data recording / reproduction management unit 106
, The data read operation is interrupted, the newly requested data is accessed, and the read-ahead capacity of the DV buffer means 104 is monitored. Is performed, the DV buffer means 104 can be efficiently used in consideration of the expected access time to another data, and data loss such as frame drop for the current channel is caused. In addition, the responsiveness of the data recording / reproducing process for another channel can be improved.

In the first embodiment, an example in which a hard disk device is used as the disk device 107 has been described. However, other disk devices, for example, a random access function such as a magneto-optical disk device or a DVD-RAM, may be used. The same effect can be obtained by using a device having

In the first embodiment, the connection between the recording / reproducing disk control device 100 and the disk device 107 is connected by an IDE interface as an example. However, the connection means is a digital signal such as a SCSI interface. May be used as the interface means capable of transferring data, and is not limited to the configuration shown in the first embodiment.

Further, in the first embodiment, an example has been described in which DV data is used as video and audio data. However, continuous video and audio data may be used.
Similar effects can be obtained with EG data.

(Embodiment 2) Hereinafter, a recording / reproducing disc control device according to Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 18 is a block diagram showing a configuration of a recording / reproducing disk control device according to the second embodiment.
In FIG. 18, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, 200 denotes a recording / reproducing disk control device according to the second embodiment, and 110 denotes a PC which temporarily performs processing on DV data. This is a processing time accumulating means for accumulating and recording various times required until data is processed and processing for DV data is restarted.

FIG. 15 is a diagram for explaining the structure of the record information of the PC data processing time of the recording / reproducing disk control device according to the second embodiment. In FIG.
The record information of the PC data processing time is stored in the processing time storage unit 1.
10, the time information required to resume the process of writing the DV data to the disk device 107 after resuming the process of reproducing the PC data during the DV data recording process and ending the process. After the processing is shifted to the data recording processing and the processing is completed, the time information required for restarting the processing of writing the DV data to the disk device 107 again, and the processing is shifted to the PC data reproduction processing during the DV data reproduction processing. After the end, the time information required until the pre-reading process of the DV data is restarted from the disk device 107 is resumed. During the DV data reproducing process, the process shifts to the recording process of the PC data, and after the process is completed, the DV data is again transferred to the disk device 107. , Time information required until the pre-reading process is restarted is collected. For each piece of information, the disk device 107 collects the number of data collected for each moving range from DV data to PC data and the maximum processing time.

In the second embodiment, the moving range is set to 1
Divide into 0 stages. The position of the DV data being processed represented by the LBA on the disk device and the P to be processed
The difference between the position of the C data and the position represented by the LBA on the disk device is divided by dividing the maximum value of the difference into ten equal parts, and the processing time is accumulated for each. Further, the recording information of the PC data processing time is stored in a nonvolatile RAM or a disk drive 10.
7, the information can be used immediately after the power of the reproduction / recording disk device is turned on using the past information.

[Operation When PC Data Recording / Reproduction Request Is Received During DV Data Recording Processing] First, the operation when PC data recording / reproduction request is received during DV data recording processing will be described. The data recording / reproducing management means 106
A detailed operation when a PC data recording / reproducing inquiry request is received during V data recording will be described. FIG.
FIG. 4 is a diagram illustrating a flowchart for describing recording / reproduction processing of PC data at the time of recording DV data.

In step S40, processing time accumulation means 110
It is determined whether or not the data as shown in FIG. 15 is sufficiently stored. If the data is not sufficiently stored, the process proceeds to step S41, while if the data is sufficiently stored, the process proceeds to step S42. Move to In the second embodiment, the PC collected at the corresponding moving distance
If the number of data processing times is 100 or more, it is determined that sufficient data has been accumulated, and the P shown in FIG.
The recording information of the C data processing time is used.

In step S41, as shown in FIG. 5, if there is no fixed amount of free buffer in the buffer of the input / output DV buffer means 104, it is determined that there is not enough time for the DV data, and data recording / reproduction is performed. In order for the management unit 106 to continue the process of writing the DV data to the disk device 107 and wait for the free space of the buffer to increase,
It returns to step S41. Here, if there is a free buffer that can store 10 or more DV data,
If there is a margin of 330 ms or more at 10 times 3 ms, it is determined that there is a sufficient margin time.

In step S42, as shown in FIG.
If the maximum value of the accumulated PC data processing time is larger than the spare time in the buffer of the input / output DV buffer means 104, the data recording / reproducing management means 106
Returns to step S42 in order to wait for the free space of the buffer to increase by continuing the process of writing the DV data to the disk device 107.

On the other hand, if the spare time in the buffer of the input / output DV buffer means 104 is larger than the maximum value of the accumulated PC data processing time in step S42, the process proceeds to step S43. The data recording / reproduction management means 106 interrupts the process of writing DV data to the disk device 107.

Next, in step S44, a PC data recording process or a PC data reproducing process is performed by the method described in the first embodiment. In step S45, the data recording / reproducing management unit 106
The V data write process is restarted. In step S46, a value obtained by adding the time required for recording / reproducing the PC data and the time required for writing one frame of DV data to the disk device 107 is passed to the processing time accumulating means 110. The storage unit 110 increases the number of collected collections by one, and when the processing time exceeds the maximum value, sets the new value to the maximum value. The data recording / reproducing management means 106 sends a recording / reproducing end notification to the PC data managing means 108 and terminates the present processing.

[Operation When Receiving PC Data Recording / Reproduction Request During DV Data Reproduction Processing] Next, the operation when receiving a PC data recording / reproduction request during DV data reproduction processing will be described. The data recording / reproducing management means 106
A detailed operation when a PC data recording / reproducing inquiry request is received during V data reproduction will be described with reference to FIG. FIG. 12 is a diagram illustrating a flowchart for describing the recording / reproducing processing of PC data at the time of reproducing DV data according to the second embodiment.

In step S50, processing time accumulation means 110
It is determined whether or not enough data has been accumulated. If not, the process proceeds to step S51, and if sufficient, the process proceeds to step S52. In the second embodiment, when the number of PC data processing times collected at the corresponding moving distance is 100 or more, it is determined that sufficient data is accumulated, and the PC data processing shown in FIG. Time record information shall be used.

In step S51, as shown in FIG. 6, when there is no fixed amount of pre-read DV data in the buffer of the input / output DV buffer means 104, the data recording / reproduction management means 106 executes the DV data pre-read from the disk device 107. The process is continued, and the process returns to step S51 to wait for an increase in the pre-read DV data in the buffer. Here, when ten or more DV data are pre-read in the buffer, that is, when there is a margin of 330 ms or more at 10 times 33 ms, it is determined that there is a sufficient margin time.

On the other hand, in step S52, as shown in FIG. 6, when the maximum value of the accumulated PC data processing time is larger than the spare time in the buffer of the input / output DV buffer means 104, The process returns to step S52 in order to continue the process of prefetching the DV data from the disk device 107 performed by the data recording / reproducing management unit 106 and to wait for an increase in the prefetched DV data in the buffer.

On the other hand, in step S52, the input / output DV is set longer than the maximum value of the accumulated PC data processing time.
If the spare time in the buffer of the buffer means 104 is larger, the process proceeds to step S53, and the data recording / reproducing management means 106 interrupts the process of pre-reading the DV data from the disk device 107.

In the following step S54, the PC data recording process or the PC data
Perform data reproduction processing. Then, in step S55,
The data recording / reproducing management means 106 restarts the process of pre-reading the DV data from the disk device 107.

Next, in step S 56, the sum of the time required for recording / reproducing PC data and the time required for pre-reading one frame of DV data from the disk device 107 is passed to the processing time storage means 110. The processing time accumulating means 110 increases the accumulated number of collections by one, and when the processing time exceeds the maximum value, sets the new value to the maximum value. The data recording / reproducing management means 106 is a PC
A recording / reproduction end notification is sent to the data management means 108 to end the present processing.

As described above, according to the second embodiment, the time required to process another data from the data currently being processed and to process the original data again, Since the processing time accumulating means 110 for accumulating the data for each address difference is provided and the switching timing of the processing request of another data during the data processing is adjusted, the overall data processing efficiency can be improved.

(Embodiment 3) Hereinafter, a recording / reproducing disk control device according to Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 19 is a block diagram showing the configuration of a recording / reproducing disk device according to the third embodiment. In the figure, components having the same functions and configurations as those in the first embodiment shown in FIG. The description is omitted here. Reference numeral 300 denotes a recording / reproducing disk control device according to the third embodiment of the present invention. Reference numeral 111 denotes an LBA indicating a current position on the disk device 107, and an access destination LBA.
This is a processing time estimating means for estimating the data access time to the disk device 107 based on the parameters of BA and the number of sectors to be accessed. The expected time is calculated as the sum of command overhead + seek time + rotation waiting time + media access time (including one single track seek) at the worst value of each.

The capacity of the disk device according to the third embodiment is such that the maximum LBA is 16,000,000, the command overhead is 2 ms, and the rotation waiting time is 11 m.
s, worst case time at full seek = 24 ms, worst seek time at single track = 3 ms, transfer rate between media and buffer = 14 to 32 MB / sec. The seek time was directly proportional to the distance traveled. Here, SrcLB
A: LBA indicating the current position, DisLBA: LBA of the access destination, SN: the number of sectors to be accessed. From FIG. 16, the expected seek time is as follows: seek time (ms) = ((maximum seek time−minimum seek time) / maximum LBA) × moving LBA + minimum seek time =
((24-3 / 16000000) × (| DisLBA-
SrcLBA |) +3. From FIG. 17, the estimated media access time is as follows: media access time = ((512 × SN) / (32−
((32-14) / 1600000) x DisLB
A)) + 3.

[Operation When Receiving PC Data Recording / Reproduction Request During DV Data Recording Process] First, the operation when receiving PC data recording / reproduction request during DV data recording processing will be described. The data recording / reproducing management means 106
A detailed operation when a PC data recording / reproducing inquiry request is received during V data recording will be described. FIG.
FIG. 11 is a diagram illustrating a flowchart for describing PC data recording / reproduction processing during DV data recording according to the third embodiment.

First, in step S60, the data recording / reproducing management means 106 transfers the D to the disk device 107.
The V data writing process is interrupted and PC data playback /
After executing the recording process, the data recording / reproducing management unit 106 is again executed.
Resumes the process of writing the DV data to the disk device 107, and transfers the DV data of one frame to the disk device 107.
The processing time estimating means 111 takes out the estimated processing time until the writing is completed in the area No. 7.

Next, in step S61, as shown in FIG. 5, if the prediction processing time obtained in step S60 is shorter than the spare time in the buffer of the input / output DV buffer means 104, the process proceeds to step S63. If not, the process proceeds to step S62.

In step S62, if the FLAG that has been cleared when this processing is started is set, the flow shifts to step S67. On the other hand, if FLAG is not set, the data recording / reproducing management means 10
6, the process returns to step S60 in order to continue the process of writing DV data to the disk device 107 and wait for an increase in free space in the buffer.

In the following step S63, the data recording / reproduction management means 106 interrupts the process of writing DV data to the disk device 107. In step S64, PC data recording processing or PC data reproduction processing is performed by the method described in the first embodiment.

Further, in step S65, the data recording / reproducing management means 106 restarts the process of writing the DV data to the disk device 107, and calculates the estimated processing time until the writing of one frame of DV data to the disk device 107 is completed. Extracted from the time prediction means 111.

In step S66, as shown in FIG. 5, if the predicted processing time obtained in step S65 is shorter than the remaining time in the buffer of the input / output DV buffer 104, the DV data has a margin. It is determined that there is, and the process proceeds to step S68. If not, the process proceeds to step S67.

In the step S67, the data recording / reproducing management means 106 restarts the process of writing the DV data to the disk device 107, and the PC data management means 108
, A notification of the end of recording / reproduction is sent to end the process.

On the other hand, in step S68, step S6
If there is a PC data recording / reproducing inquiry request other than the PC data processed in step 4, the process proceeds to step S69, where FLAG is set, and the process returns to step S60. If it is determined in step S68 that there is no request for new PC data, the process proceeds to step S65.

[Operation When PC Data Recording / Reproduction Request Is Received During DV Data Reproduction Processing] Next, the data recording / reproduction management means 106 receives a PC data recording / reproduction enable inquiry request during DV data reproduction. The detailed operation at the time of the occurrence will be described. FIG. 14 is a diagram illustrating a flowchart for explaining the recording / reproducing process of PC data at the time of reproducing DV data according to the third embodiment.

First, in step S70, the process of pre-reading the DV data from the disk device 107, which is being performed by the data recording / reproducing management means 106, is interrupted to reproduce / reproduce the PC data.
After executing the recording process, the data recording / reproducing management unit 106 is again executed.
Restarts the DV data read-ahead process from the disk device 107, and transfers one frame of DV data to the disk device 10
From the processing time estimating means 111, the estimated processing time until the reading from step 7 is read out.

Next, in step S71, as shown in FIG. 6, if the predicted processing time obtained in step S60 is smaller than the spare time in the buffer of the input / output DV buffer means 104, the process proceeds to step S73. Otherwise, the process moves to step S72.

In step S72, if the FLAG that has been cleared when this processing is started is set, the flow shifts to step S77. On the other hand, if FLAG is not set, the data recording / reproducing management means 10
6, the process returns to step S70 in order to continue the process of reading DV data from the disk device 107 and wait for an increase in the prefetched DV data in the buffer.

In the subsequent step S73, the data recording / reproducing management means 106 interrupts the DV data prefetch processing from the disk device 107. In step S74, PC data recording processing or PC data reproduction processing is performed by the method described in the first embodiment. Further, in step S75, the data recording / reproducing management means 106
7 is resumed, and the processing time estimating means 111 takes out the estimated processing time until the DV data of one frame is read from the disk device 107.

In step S76, as shown in FIG. 6, if the prediction processing time obtained in step S75 is shorter than the remaining time in the buffer of the input / output DV buffer means 104, the DV data has a margin. If so, the process moves to step S78; otherwise, the process moves to step S77.

In step S77, the data recording / reproducing management means 106 restarts the DV data pre-reading process from the disk device 107, and sends a recording / reproducing end notification to the PC data managing means 108 to end this processing.

On the other hand, in step S78, step S7
If there is a PC data recording / playback inquiry request different from the PC data processed in step 4, the process proceeds to step S79, where FLAG is set, and the process returns to step S70. If it is determined in step S78 that there is no request for new PC data, the process proceeds to step S75.

As described above, according to the third embodiment, when a request for processing another data is made from the data currently being processed, the access time is set to the time of the data currently being processed in the disk device 107. A processing time estimating unit 111 for estimating based on the parameters of the LBA indicating the position, the LBA of the access destination, and the number of sectors to be accessed is provided, and after switching the processing request of other data during data processing,
The processing time estimating means 111 calculates the expected time for processing the original data, and the input / output DV buffer means 1 at that time.
Since the switching timing of the two requests is adjusted using the capacity of No. 04 and the estimated time, the overall data processing efficiency can be improved.

(Embodiment 4) Hereinafter, a recording / reproducing disk apparatus according to Embodiment 4 of the present invention will be described with reference to the drawings. FIG. 20 is a block diagram illustrating a configuration of a recording / reproducing disk device according to the fourth embodiment. 20, components having functions and configurations similar to those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted here.

As shown in FIG. 20, a recording / reproducing disk device 120 according to the fourth embodiment includes a magnetic disk 121 as a recording medium and a magnetic head 122 for writing and reading digital signals to and from the magnetic disk 121.
Is provided inside. In the first embodiment, the ID
In the fourth embodiment, the data recording / reproducing management means 106, which has been performing data recording / reproducing work on the disk device 107 via the E interface, controls writing and reading of digital signals to / from the magnetic disk 121 via the magnetic head 122. Is performed.

In FIG. 20, blocks assigned the same numbers as in the first embodiment perform the same processing as in the first embodiment. Therefore, in response to various requests from external devices connected to the IEEE 1394 bus 101, the fourth embodiment
Each block in the disk device executes the same operation as in the first embodiment.

Recording / reproducing disk device 1 of the fourth embodiment
20, the disk device 10 according to the first embodiment
7 can be implemented in an electric / electronic circuit. As a result, compared to the case where the recording / reproducing disk control device 100 and the disk device 107 are used separately as in Embodiment 1, the cost and size of the disk device for recording and reproducing video and audio data can be reduced. It is possible to plan.

In the above embodiment, the description has been given of the configuration in which the video / audio signal is written to the magnetic disk as the storage medium. However, the random access function such as a magneto-optical disk or a DVD-RAM is used as the storage medium. The same effect can be obtained by using a storage medium having the same.

Further, the recording / reproducing disk control device and the disk device in each of the above embodiments are compatible with the IEEE13 standard.
Although the configuration in which the device is connected to an external device via the 94 bus has been described as an example, the present invention may be any bus that can transmit and receive video and audio signals, and is not limited to the configuration of the above embodiment. Absent.

[0123]

As described above, according to the recording / reproducing disk control apparatus according to the first aspect of the present invention, a plurality of signals, video / audio data, and discontinuous data are simultaneously transmitted / received to / from a plurality of external devices. A recording / reproducing disk control device for controlling a storage device, comprising: input / output buffer means for temporarily storing data input from the outside or data read from the storage device; and reproducing the video / audio data. When a request for reproducing or recording another video / audio data or non-continuous data is received, if the video / audio data being reproduced is pre-read and stored in the input / output buffer means by a predetermined amount, the above-mentioned reproduction is performed. Or data recording / reproducing management means for controlling the reproduction or recording operation of another video / audio data or discontinuous data that has received a recording request. Therefore, during the reproduction of the video / audio data, the recording / reproducing process of another discontinuous data can be efficiently executed without interrupting the currently reproduced video / audio data. .

According to the recording / reproducing disk control device of the second aspect of the present invention, in the recording / reproducing disk control device of the first aspect, when the video / audio data is being reproduced, another video / audio data or When a request for reproducing or recording non-continuous data is received, the data recording / reproducing management means interrupts the pre-reading process of the video / audio data, performs another video / audio data or non-continuous data reproduction / recording operation, and performs again. Processing time accumulation means for accumulating a time required for restarting the prefetching processing of the video / audio data, wherein the data recording / reproduction management means reproduces the reproduction data based on the time accumulated by the processing time accumulation means. Since the timing for switching from the pre-reading process to the playback and recording operation of another video / audio data or non-video / audio data has been changed, During playback the video and audio data without run out developing audiovisual data currently being reproduced,
The effect is obtained that the recording / reproducing processing of another non-continuous data can be executed efficiently.

According to a third aspect of the present invention, there is provided the recording / reproducing disk control device according to the first aspect, wherein when the video / audio data is reproduced, another non-continuous data of the non-continuous data is reproduced. A processing time prediction means for predicting a processing time required when performing a pre-reading process of the video / audio data when receiving a reproduction / recording request and performing a reproduction of another non-continuous data and a recording operation, The data recording / reproducing management means, when receiving a request for reproducing or recording another discontinuous data while actually reproducing the video / audio data, the video / audio being reproduced stored in the input / output buffer means. Obtained from the data look-ahead amount,
If the spare time for performing the continuous reproduction of the video and audio data exceeds the expected time obtained from the processing time prediction means, control is performed to perform another non-continuous data reproduction and recording operation. As a result, during the reproduction of the video and audio data, an effect is obtained that the recording / reproduction processing of another discontinuous data can be efficiently executed without interrupting the currently reproduced video and audio data.

According to the recording / reproducing disk control device of the fourth aspect of the present invention, in the recording / reproducing disk control device of the first aspect, the data recording / reproducing management unit is configured to reproduce the video / audio data. If the pre-reading of the video / audio data is interrupted and the reproduction / recording processing of another video / audio data or non-continuous data is performed, the pre-reading of the another video / audio data is performed when the pre-reading amount becomes a certain amount or less. Since the processing or the reproduction / recording processing of the discontinuous data is interrupted and the prefetch processing of the video / audio data is restarted, during the reproduction of the video / audio data,
The effect is obtained that the recording / reproducing processing of another non-continuous data can be efficiently executed without interrupting the currently reproduced video / audio data.

According to a fifth aspect of the present invention, in the recording / reproducing disk control device according to the third aspect, the data recording / reproducing management unit is configured to reproduce the video / audio data. If the pre-reading of the video / audio data is interrupted and another video / audio data or non-continuous data is reproduced / recorded, the reproduction of the video / audio data without interruption is obtained from the pre-reading amount of the video / audio data. When the spare time for performing is smaller than the estimated time required to interrupt the reproduction / recording process of another video / audio data or discontinuous data and restart the prefetching process of the video / audio data, The prefetching process of another video / audio data or the reproduction / recording process of discontinuous data is interrupted, and the prefetching process of the video / audio data is restarted. Since the, during the reproduction of the video and audio data without run out developing audiovisual data currently being reproduced, the effect is obtained that the recording and reproduction of another non-continuous data can be executed efficiently.

According to the recording / reproducing disk control device of the sixth aspect of the present invention, a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices is controlled. A recording / reproducing disk control device, wherein input / output buffer means for temporarily storing externally input data or data read from the storage device, and when the video / audio data is recorded in the storage device In the case where a request for reproducing or recording another video / audio data or discontinuous data is received, the input / output buffer means does not exceed a certain amount of the video / audio data being recorded which has not been written to the storage device. In such a case, control is performed so as to perform the reproduction or recording operation of another video / audio data or discontinuous data that has received the reproduction or recording request. Having assumed that a data recording reproducing management means, during recording audiovisual data,
The effect is obtained that the recording / reproducing processing of another non-continuous data can be efficiently executed without interrupting the currently reproduced video / audio data.

Further, according to the recording / reproducing disc control device of the present invention, in the recording / reproducing disc control device of the above-mentioned claim, when the video / audio data is recorded, another video / audio data or When a request for reproducing or recording non-continuous data is received, the data recording / reproducing management means interrupts the process of writing the video / audio data stored in the input / output buffer means to the disk device, and outputs another video. A processing time accumulating means for reproducing and recording audio data or discontinuous data and accumulating a time required for restarting the recording processing of the video / audio data is provided. For processing another video / audio data or non-continuous data obtained from the video / audio data amount that can be stored in the output buffer means. Based on the spare time based on the free space of the buffer and the time accumulated by the processing time accumulating means, the process of writing the video and audio data stored in the input / output buffer means to the disk device is performed by Since the timing of switching to another requested video / audio data or non-video / audio data playback / recording operation has been changed, without interrupting the currently reproduced video / audio data while recording video / audio data, The effect is obtained that the recording / reproducing processing of another non-continuous data can be executed efficiently.

Further, according to the recording / reproducing disk control device according to the eighth aspect of the present invention, in the recording / reproducing disk control device according to the sixth aspect, when recording video / audio data, another non-continuous data When a reproduction / recording request is received, the data recording / reproduction management means interrupts the writing process of the video / audio data stored in the input / output buffer means to the disk device to reproduce another piece of the discontinuous data, A processing time estimating means for estimating a processing time required when a recording operation is performed; wherein the data recording / reproducing management means reproduces or records another non-continuous data when video / audio data is actually recorded. When a request is received, a buffer for recording / reproducing another discontinuous data obtained from the video / audio data amount that can be stored in the input / output buffer means. If the spare time based on the free space of the file exceeds the expected time obtained from the processing time estimating means, the control is performed so as to perform the reproduction and recording operations of the other non-continuous data. During recording of data, an effect is obtained that recording / reproduction processing of another discontinuous data can be efficiently executed without interrupting the currently reproduced video / audio data.

According to a ninth aspect of the present invention, in the recording / reproducing disk control device according to the ninth aspect, the data recording / reproducing management means includes: In the case where the processing of writing the video / audio data stored in the input / output buffer means to the disk device is interrupted and the reproduction / recording processing of another video / audio data or discontinuous data is performed,
When the margin time based on the free space of the buffer for recording / reproducing another non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means falls below a certain amount, the other Interrupt the pre-reading process of video / audio data or the playback / recording process of non-continuous data,
Since the process of writing the video / audio data stored in the input / output buffer means to the disk device is restarted, the video / audio data being recorded is not interrupted while the video / audio data is being recorded. The recording / reproducing process of the non-continuous data can be efficiently executed.

Further, according to the recording / reproducing disk control device of the present invention, in the recording / reproducing disk control device of the above-mentioned claim, the data recording / reproducing management means may record the video / audio data. When the process of writing the video / audio data stored in the input / output buffer unit to the disk device is interrupted and the reproduction / recording process of another video / audio data or discontinuous data is performed, the input / output buffer unit The spare time based on the free space of the buffer for recording and reproducing another non-continuous data obtained from the amount of video and audio data that can be accumulated, interrupts the reproduction and recording processing of another video and audio data or non-continuous data. When the time becomes shorter than the estimated time required to restart the writing process of the video / audio data to the disk device, Since the pre-reading process of the video / audio data or the reproduction / recording process of the non-continuous data is interrupted and the process of writing the video / audio data stored in the input / output buffer means to the disk device is resumed, During recording of audio data, an effect is obtained that recording / reproduction processing of another discontinuous data can be efficiently executed without interrupting the currently reproduced video / audio data.

Further, according to the recording / reproducing disk control device according to the eleventh aspect of the present invention, the above-mentioned first to first aspects are described.
0, in which the disk is a magnetic disk, and while recording video / audio data on the magnetic disk, without interrupting the currently reproduced video / audio data, As a result, it is possible to efficiently execute another non-continuous data recording / reproducing process.

Further, according to the recording / reproducing disc control device of the twelfth aspect of the present invention, the first to the first aspects of the present invention.
0, in which the disk is a magneto-optical disk, while recording the video and audio data on the magneto-optical disk, without interrupting the currently reproduced video and audio data, The effect is obtained that another non-continuous data recording / reproducing process can be efficiently executed from the magneto-optical disk.

Further, according to the recording / reproducing disk control method according to the thirteenth aspect of the present invention, a storage device for simultaneously transmitting and receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices is controlled. A method for controlling a recording / reproducing disc, comprising the steps of temporarily storing externally input data or data read from the storage device in the input / output buffer means, and reproducing the video / audio data. Detecting that a request for reproducing or recording another video / audio data or discontinuous data has been received; and determining whether a predetermined amount of the video / audio data being reproduced has been stored in the input / output buffer means in advance. Detecting the video and audio data being played back in the input / output buffer means when a predetermined amount of the video / audio data has been read ahead and stored; Controlling the reproduction or recording operation of another video / audio data or non-continuous data that has been requested, so that the video / audio data that is currently being reproduced while the video / audio data is being reproduced. The recording and reproducing processing of another piece of non-continuous data can be performed efficiently without interruption.

According to a recording / reproducing disk control method according to claim 14 of the present invention, in the recording / reproducing disk control method according to claim 13, when the video / audio data is being reproduced, another video / audio data is reproduced. Alternatively, after receiving a request for reproduction or recording of non-continuous data, the prefetch processing of the video / audio data is interrupted, and the reproduction / recording operation of another video / audio data or discontinuous data is performed, and the prefetch processing of the video / audio data is performed again. The step of accumulating the time required until restarting, and the timing of switching from the pre-reading processing of the reproduction data to the reproduction and recording operation of another video / audio data or non-video / audio data based on the time accumulated in the above steps. Change step,
During reproduction of the video / audio data, an effect is obtained that the recording / reproduction processing of another discontinuous data can be efficiently executed without interrupting the currently reproduced video / audio data.

According to a recording / reproducing disk control method according to claim 15 of the present invention, in the recording / reproducing disk control method according to claim 13, when the video / audio data is reproduced, another non-continuous data is reproduced. A process of predicting the processing time required when the pre-reading process of the video / audio data is interrupted in response to the reproduction / recording request to perform the reproduction / recording operation of another piece of the discontinuous data, and When a request for reproduction or recording of another discontinuous data is received during reproduction of video data, uninterrupted video / audio data obtained from the pre-reading video / audio data amount stored in the input / output buffer means. If the spare time for reproducing the data exceeds the predicted time obtained from the step of predicting the processing time, the reproducing and recording operations of the above-mentioned another discontinuous data are performed. And performing the recording / reproducing process of another discontinuous data efficiently without interrupting the currently reproduced video / audio data while reproducing the video / audio data. Is obtained.

According to a recording / reproducing disk control method according to claim 16 of the present invention, in the recording / reproducing disk control method according to claim 13, the prefetching of the video / audio data is interrupted while the video / audio data is being reproduced. And performing another video / audio data or non-continuous data reproduction / recording process, detecting that the pre-reading amount has become a certain amount or less, and receiving the detection result, Interrupting the pre-reading process of the video / audio data or the reproduction / recording process of the discontinuous data, and restarting the pre-reading process of the video / audio data. The effect is obtained that the recording / reproducing processing of another piece of non-continuous data can be executed efficiently without interrupting the video / audio data therein.

According to the recording / reproducing disc control method of the present invention, the prefetching of the video / audio data is interrupted while the video / audio data is being reproduced. When performing playback / recording processing of another video / audio data or non-continuous data, the extra time for performing continuous video / audio data obtained from the prefetch amount is
A step of detecting that the time is shorter than an estimated time required for interrupting the reproduction / recording processing of another video / audio data or discontinuous data and restarting the prefetching processing of the video / audio data, and the margin time When it is detected that the time is shorter than the expected time, the prefetching process of the other video / audio data or the reproduction / recording process of the discontinuous data is interrupted, and the prefetching process of the video / audio data is restarted. And that the recording / reproducing process of another discontinuous data can be efficiently executed without interrupting the currently reproduced video / audio data while reproducing the video / audio data. The effect is obtained.

According to the recording / reproducing disk control method of the eighteenth aspect of the present invention, a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices is controlled. A method for controlling a recording / reproducing disc, comprising the steps of temporarily storing externally input data or data read from the storage device in the input / output buffer means, and when the video / audio data is recorded. Detecting that a request for reproducing or recording another video / audio data or discontinuous data has been received, and the input / output buffer means has a condition that the amount of video / audio data being recorded that has not been written to the disk device exceeds a certain amount. Detecting whether or not the video and audio are recorded in the input / output buffer means. If the data is not accumulated beyond a certain amount, the video / audio data is recorded while the video / audio data is being recorded. In, without interrupting the video and audio data currently being played,
The effect is obtained that the recording / reproducing processing of another non-continuous data can be executed efficiently.

According to a recording / reproducing disc control method according to claim 19 of the present invention, in the recording / reproducing disc controlling method according to claim 18, when video / audio data is recorded, another video / audio data is recorded. Alternatively, when a request for reproducing or recording non-continuous data is received, the process of writing the video / audio data stored in the input / output buffer means to the disk device is interrupted, and reproduction of another video / audio data or non-continuous data is performed. , Perform the recording operation,
Accumulating the time required to restart the recording process of the video / audio data, and processing another video / audio data or non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means. Based on the spare time based on the free space of the buffer for performing the above and the time accumulated in the above step, the writing processing of the video / audio data stored in the input / output buffer means to the disk device is performed. A step of changing the timing of switching to another requested video / audio data or non-video / audio data reproduction / recording operation, so that the video / audio data currently being reproduced is recorded while the video / audio data is being recorded. The effect is obtained that the recording / reproducing processing of another discontinuous data can be executed efficiently without interruption.

According to a recording / reproducing disk control method according to claim 20, in the recording / reproducing disk control method according to claim 18, when non-continuous data is recorded when video and audio data are recorded. When the reproduction / recording request is received, the process of writing the video / audio data stored in the input / output buffer means to the disk device is interrupted to perform another reproduction / recording operation of the discontinuous data. Estimating the processing time required for the video data and the video which can be stored in the input / output buffer means when another non-continuous data reproduction or recording request is received while video / audio data is actually being recorded. The processing time is estimated based on the free space of a buffer for processing different video / audio data or discontinuous data obtained from the audio data amount. If the time exceeds the expected time obtained from the step, the step of controlling the reproduction and the recording operation of the other non-continuous data is performed. The recording / reproducing process of another non-continuous data can be efficiently executed without interrupting the video / audio data.

According to a recording / reproducing disk control method according to claim 21 of the present invention, in the recording / reproducing disk control method according to claim 18, the video / audio data is stored in the input / output buffer means during recording. If the writing / writing of the video / audio data to the disk device is interrupted and the reproduction / recording of another video / audio data or discontinuous data is performed, the video / audio data amount that can be stored in the input / output buffer means A step of detecting that the spare time based on the free space of the buffer for processing another video / audio data or non-continuous data has become a certain amount or less, and receiving the detection result, The pre-reading process of video / audio data or the reproduction / recording process of discontinuous data is interrupted, and the Having shall include, resuming step a write processing to the disk device of the image audio data,
During recording of the video and audio data, an effect is obtained that the recording / reproduction processing of another discontinuous data can be efficiently executed without interrupting the currently reproduced video and audio data.

According to the recording / reproducing disk control method of the present invention, in the recording / reproducing disk control method of the twentieth aspect, the video / audio data is stored in the input / output buffer means during recording. If the writing / writing of the video / audio data to the disk device is interrupted and the reproduction / recording of another video / audio data or discontinuous data is performed, the video / audio data amount that can be stored in the input / output buffer means The spare time based on the free space of a buffer for processing another video / audio data or non-continuous data obtained from the video / audio data by interrupting the reproduction / recording process of another video / audio data or non-continuous data When the time required to restart the writing process to the disk device becomes smaller than the expected time,
Including a step of interrupting a read-ahead process of the another video / audio data or a reproduction / recording process of discontinuous data and restarting a write process of the video / audio data stored in the input / output buffer means to a disk device. Therefore, during recording of the video / audio data, an effect is obtained that the recording / reproducing processing of another discontinuous data can be efficiently executed without interrupting the video / audio data currently being reproduced.

Further, according to the recording / reproducing disk device of claim 23 of the present invention, a plurality of external devices can
A recording / reproducing disk device including a recording / reproducing disk control device for controlling a storage device for simultaneously transmitting and receiving a plurality of signals, video / audio data, and discontinuous data, wherein the recording / reproducing disk control device includes: Or an input / output buffer means for temporarily storing data read from the storage device, and a request for reproducing or recording another video / audio data or discontinuous data while reproducing the video / audio data If the video / audio data being reproduced has been pre-read and stored in the input / output buffer means by a predetermined amount, the reproduction / recording operation of another video / audio data or discontinuous data requested to be reproduced or recorded is performed. And a data recording / reproducing management means for controlling the video / audio data to be reproduced. Without run out developing audiovisual data currently being reproduced, the effect is obtained that the recording and reproduction of another non-continuous data can be executed efficiently.

Further, according to the recording / reproducing disk device of claim 24 of the present invention, a plurality of external devices can communicate with each other.
A recording / reproducing disk device including a recording / reproducing disk control device for controlling a storage device for simultaneously transmitting and receiving a plurality of signals, video / audio data, and discontinuous data, wherein the recording / reproducing disk control device includes: Or an input / output buffer means for temporarily storing data read from the storage device, and a request for reproducing or recording another video / audio data or discontinuous data when the video / audio data is recorded in the storage device. If the received audio / video data does not exceed a certain amount in the input / output buffer means and is not written in the storage device, the video / audio data requested to be reproduced or recorded is stored in the input / output buffer means. Or data recording / reproducing management means for controlling to perform reproducing or recording operation of discontinuous data. Since, during the recording audiovisual data, without run out developing audiovisual data currently being reproduced, the effect is obtained that the recording and reproduction of another non-continuous data can be executed efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a recording / reproducing disk control device according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing a data area structure of a disk device used in the recording / reproducing disk control device according to the first embodiment.

FIG. 3 is a diagram for explaining recording management information recorded in a DV data management area of a disk device used similarly to the recording / reproducing disk control device in the first embodiment.

FIG. 4 is a diagram showing structures of DV data, area management information, and PC data of a disk device used in the recording / reproducing disk control device according to the first embodiment.

FIG. 5 is a block diagram for explaining the operation of an input / output DV buffer unit when recording DV data in the recording / reproducing disk control device according to the first embodiment.

FIG. 6 is a diagram for explaining the operation of the input / output DV buffer means when the DV data is reproduced by the recording / reproducing disk control device according to the first embodiment.

FIG. 7 is a flowchart illustrating a method of calculating a next recording LBA when recording DV data in the recording / reproducing disk control device according to the first embodiment.

FIG. 8 is a flowchart illustrating a method for calculating a next reproduction LBA at the time of reproducing DV data in the recording and reproduction disk control device according to the first embodiment.

FIG. 9 shows the recording / reproduction of PC data at the time of DV data recording by the recording / reproducing disk control device according to the first embodiment.
FIG. 7 is a diagram illustrating a flowchart for describing a reproduction process.

FIG. 10 is a diagram illustrating a flowchart for explaining a PC data recording / reproducing process when the DV data is reproduced by the recording / reproducing disk control device according to the first embodiment.

FIG. 11 is a flowchart illustrating a PC data recording / reproducing process performed by the recording / reproducing disk control device according to the second embodiment of the present invention when recording DV data.

FIG. 12 is a flowchart illustrating a PC data recording / reproducing process during DV data reproduction by the recording / reproducing disk control device according to the second embodiment.

FIG. 13 is a flowchart illustrating a PC data recording / reproducing process performed by the recording / reproducing disk control device according to the third embodiment when recording DV data.

FIG. 14 is a flowchart illustrating a process of recording and reproducing PC data at the time of reproducing DV data by the recording and reproducing disk control device according to the third embodiment.

FIG. 15 is a diagram showing a structure of recording information of a PC data processing time of the recording / reproducing disk control device according to the second embodiment.

FIG. 16 is a diagram for explaining a method of calculating an expected seek time of the recording / reproducing disk control device according to the third embodiment.

FIG. 17 is a diagram for explaining a method of calculating an estimated media access time of the recording / reproducing disk control device according to the third embodiment.

FIG. 18 is a block diagram illustrating a configuration of a recording / reproducing disk control device according to the second embodiment.

FIG. 19 is a block diagram illustrating a configuration of a recording / reproducing disk control device according to the third embodiment.

FIG. 20 is a block diagram illustrating a configuration of a recording / reproducing disk device including a recording / reproducing disk control device in the disk device according to Embodiment 4 of the present invention.

[Explanation of symbols]

 100, 200, 300 Recording / playback disk control device 101 IEEE 1394 bus 102 External interface means 103 Video / audio data management means 104 Input / output DV buffer management means 105 Input / output PC buffer management means 106 Data recording / playback management means 107 Disk device 108 PC data management Means 109 File system management means 110 Processing time accumulation means 111 Processing time prediction means 120 Recording / playback disk device 121 Magnetic disk 122 Magnetic head

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/937 H04N 5/93 CF term (Reference) 5B005 LL11 MM11 MM22 5B065 BA01 BA04 CA11 CC08 CE14 ZA16 5C053 FA23 GB10 GB11 HA31 HC05 JA01 JA12 LA15 5D044 AB01 AB05 AB07 BC01 CC04 DE48 EF03 FG10 GK12 HL11 JJ03 JJ06

Claims (24)

[Claims] 1. A recording / reproducing disk control device for controlling a storage device for simultaneously transmitting and receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices, comprising: I / O buffer means for temporarily storing data read from the storage device, and during reproduction of the video and audio data, when reproduction of another video and audio data or discontinuous data, a recording request is received,
When the video / audio data being reproduced has been pre-read and stored in the input / output buffer means by a predetermined amount, the reproduction / recording operation of another video / audio data or discontinuous data requested to be reproduced / recorded is performed. And a data recording / reproducing management means for controlling the recording / reproducing disk control device. 2. The data recording / reproducing management device according to claim 1, wherein a reproduction / recording request of another video / audio data or discontinuous data is received while the video / audio data is being reproduced. Means for reproducing and recording another video / audio data or non-continuous data after interrupting the prefetching process of the video / audio data, and accumulating a time required for restarting the prefetching process of the video / audio data again. The data recording / reproducing management means, based on the time accumulated in the processing time accumulating means, from the pre-reading processing of the reproduction data to the reproduction of another video / audio data or non-video / audio data, A recording / reproducing disk control device, wherein a timing for switching to a recording operation is changed. 3. The recording / reproducing disk control device according to claim 1, wherein when a request for reproducing or recording another non-continuous data is received while reproducing the video / audio data, the prefetch processing of the video / audio data is interrupted. A processing time estimating means for estimating a processing time required to perform another non-continuous data reproducing / recording operation, wherein the data recording / reproducing management means performs another reproducing operation while the video / audio data is actually being reproduced. When a request for reproducing and recording discontinuous data is received, a margin time for performing continuous reproduction of video and audio data obtained from the read-ahead amount of video and audio data being reproduced stored in the input / output buffer means. However, if the estimated time obtained from the processing time estimating means is exceeded, control is performed to perform the reproduction and recording operations of the other discontinuous data. Location. 4. The recording / reproducing disk control device according to claim 1, wherein the data recording / reproducing management means interrupts pre-reading of the video / audio data during reproduction of the video / audio data, and outputs another video / audio data or non-continuous data. When performing the data reproduction and recording processing, when the pre-reading amount becomes a certain amount or less, the pre-reading processing of the another video / audio data or the reproduction and recording of the non-continuous data is interrupted, and the A recording / reproducing disc control device for resuming prefetching of video / audio data. 5. The recording / reproducing disk control device according to claim 3, wherein the data recording / reproducing management means interrupts pre-reading of the video / audio data during reproduction of the video / audio data, and outputs another video / audio data or non-continuous data. When performing data reproduction and recording processing, the extra time for performing uninterrupted reproduction of video and audio data obtained from the pre-reading amount of the video and audio data is different from that of the other video and audio data or non-continuous data. When the time required for resuming the reproduction / recording process of the video data and resuming the prefetching process of the video / audio data becomes shorter than the expected time, the prefetching process of the other video / audio data or the reproduction / recording of the non-continuous data is performed. A recording / reproducing disk control apparatus, wherein the processing is interrupted and the prefetch processing of the video / audio data is resumed. 6. A recording / reproducing disk control device for controlling a storage device for simultaneously transmitting and receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices, comprising: An input / output buffer means for temporarily storing data read from the storage device, and a request for reproducing or recording another video / audio data or discontinuous data while recording the video / audio data in the storage device. If the input / output buffer means does not exceed the fixed amount of the video / audio data being recorded which has not been written to the storage device, the video / audio data which has received the reproduction / recording request or the non-video / audio data which has received the reproduction / recording request. A recording / reproducing disk control device, comprising: data recording / reproducing management means for controlling to perform continuous data reproducing / recording operations. 7. The data recording / reproducing management means according to claim 6, wherein when a request for reproducing or recording another video / audio data or discontinuous data is received while recording the video / audio data, the data recording / reproducing management means. After interrupting the writing process of the video / audio data stored in the input / output buffer means to the disk device, the reproduction / recording operation of the another video / audio data or the discontinuous data is performed, and the video Processing time accumulating means for accumulating a time required until the recording processing of the audio data is resumed, wherein the data recording / reproducing management means is obtained from the video / audio data amount which can be accumulated in the input / output buffer means. Time based on the free space of the buffer for processing the video / audio data or the non-continuous data, and the time stored in the processing time storage means. From the process of writing the video / audio data stored in the input / output buffer means to the disk device, and from the reproduction / recording operation of the other requested video / audio data or non-video / audio data, A recording / reproducing disk control device, wherein a switching timing is changed. 8. The recording / reproducing disk control device according to claim 6, wherein the data recording / reproducing management means receives the input / output when receiving a request for reproducing / recording another discontinuous data while recording the video / audio data. A processing time estimating means for estimating a processing time required for interrupting a process of writing the video / audio data stored in the buffer means to the disk device and performing a reproducing / recording operation of the another discontinuous data; The data recording / reproducing management means, when actually reproducing the non-continuous data while recording the video / audio data, receives a recording request, and calculates the video / audio data amount that can be stored in the input / output buffer means. If the extra time obtained based on the free space of the buffer for recording / reproducing another non-continuous data exceeds the expected time obtained from the processing time estimating means, Serial another discontinuous data reproduction, the recording and reproducing disk control unit and controls so as to perform the recording operation. 9. The recording / reproducing disk control device according to claim 7, wherein the data recording / reproducing management means transmits the video / audio data stored in the input / output buffer means to the disk device while recording the video / audio data. When the writing process is interrupted and another video / audio data or non-continuous data is being reproduced or recorded, another non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means. When the spare time based on the free space of the buffer for recording / reproducing processing becomes less than a certain amount, the pre-reading processing of the other video / audio data or the reproduction / recording processing of the discontinuous data is interrupted, and the input / output processing is stopped. A recording / reproducing disk control, wherein a process of writing the video / audio data stored in the output buffer means to a disk device is restarted. Location. 10. The recording / reproducing disk control device according to claim 8, wherein the data recording / reproducing management means writes the video / audio data stored in the input / output buffer means to the disk device while recording the video / audio data. If the processing is interrupted and another video / audio data or non-continuous data is being reproduced and recorded, another non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means is recorded. The extra time based on the free space of the buffer for the reproduction processing is necessary for interrupting the reproduction and recording processing of another video / audio data or discontinuous data and restarting the processing of writing the video / audio data to the disk device. If the time becomes shorter than the expected time, the pre-reading process of the other video and audio data or the reproduction and recording process of the non-continuous data Interrupted, the recording reproducing disk control apparatus characterized by resuming the writing process to the disk device of the video audio data accumulated in the output buffer means. 11. The disk control device according to claim 1, wherein the disk is a magnetic disk. 12. The disk control device according to claim 1, wherein the disk is a magneto-optical disk. 13. A recording / reproducing disk control method for controlling a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices, comprising: Temporarily storing the data read from the storage device in the input / output buffer means; and when reproducing the video / audio data, receiving a request for reproducing / recording another video / audio data or discontinuous data. Detecting whether or not the video / audio data being reproduced is pre-read and stored in the input / output buffer means by a predetermined amount; and the video / audio data being reproduced is stored in the input / output buffer means. If it is detected that a certain amount of data has been prefetched and stored, if there is another video / audio data that has received the above reproduction / recording request from the reproduction data prefetching process, Reproducing disk control wherein the, including the reproduction of non-continuous data, the step of switching the recording operation, the. 14. The recording / reproducing disk control method according to claim 13, wherein when the video / audio data is being reproduced, a request for reproducing / recording another video / audio data or discontinuous data is received, Interrupting the data pre-reading process, performing another video / audio data or discontinuous data reproduction / recording operation, and accumulating the time required until restarting the video / audio data pre-reading process again; Recording / reproducing disk control method, wherein the timing for switching from read-ahead processing of reproduction data to reproduction / recording operation of another video / audio data or non-video / audio data is changed based on the time accumulated in step (a). 15. The recording / reproducing disk control method according to claim 13, wherein when the video / audio data is being reproduced, a pre-reading process of the video / audio data is interrupted in response to a reproduction / recording request for another discontinuous data. And a process of estimating the processing time required to perform another non-continuous data reproduction / recording operation, and requesting another non-continuous data reproduction / recording request during actual reproduction of video / audio data. A step of estimating the processing time, which is based on the pre-reading amount of the video / audio data being reproduced stored in the input / output buffer means. If the estimated time obtained from is exceeded, the other non-continuous data reproduction, a step of controlling to perform a recording operation,
A recording / reproducing disk control method, comprising: 16. The recording / reproducing disk control method according to claim 13, wherein pre-reading of said video / audio data is interrupted during reproduction of video / audio data, and reproduction / recording processing of another video / audio data or discontinuous data is performed. Detecting that the pre-reading amount has become equal to or less than a predetermined amount, and, in response to the detection result, interrupting the pre-reading process of the another video / audio data or the reproduction / recording process of the non-continuous data. Restarting the pre-reading process of the video / audio data. 17. The recording / reproducing disk control method according to claim 15, wherein the pre-reading of the video / audio data is interrupted while the video / audio data is being reproduced, and the reproduction / recording processing of another video / audio data or discontinuous data is performed. The time to play back uninterrupted video and audio data obtained from the amount of pre-reading is interrupted by the reproduction and recording of another video and audio data or non-continuous data. A step of detecting that the estimated time required for restarting the pre-reading process has become shorter than the expected time required for resuming the read-ahead processing; Interrupt the data pre-reading process or the discontinuous data playback and recording process,
Restarting the pre-reading processing of the video / audio data. 18. A recording / reproducing disk control method for controlling a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices, comprising: Temporarily storing the data read from the storage device in the input / output buffer means, and detecting that a request for reproducing or recording another video / audio data or discontinuous data has been received while the video / audio data is being recorded. A step of detecting whether or not video / audio data being recorded that has not been written to the disk device is accumulated in a volume exceeding a certain amount in the input / output buffer means. If it is detected that the video / audio data being recorded that has not been written to the device has not been stored in an amount exceeding a certain amount, the writing of the video / audio data is performed. Reproduction of the further video and audio data or non-continuous data from the write processing, recording and reproduction disk control method characterized by and a step of switching the recording operation. 19. The recording / reproducing disc control method according to claim 18, wherein the video / audio data is stored in the input / output buffer means after receiving a request for reproducing / recording another video / audio data or discontinuous data during recording. The time required for interrupting the writing process of the video / audio data to the disk device, performing the reproduction / recording operation of another video / audio data or discontinuous data, and restarting the recording process of the video / audio data again. Further comprising a step of storing, obtained from the amount of the video and audio data that can be stored in the input / output buffer means, a spare time based on a free space of a buffer for processing another video and audio data or discontinuous data; Based on the time accumulated in the step, the video / audio data stored in the input / output buffer means is transferred to the disk device. From the processing write attempts, the reproduction of the requested separate video and audio data or non-video audio data, recording and reproduction disk control method characterized by changing the timing of switching the recording operation. 20. The recording / reproducing disk control method according to claim 18, wherein when a request for reproducing or recording another non-continuous data is received while recording the video / audio data, the input / output buffer stored in the input / output buffer means. A step of estimating the processing time required to perform the reproduction and recording operation of the above-mentioned discontinuous data by interrupting the writing processing of the video / audio data to the disk device; and When a request for reproduction and recording of non-continuous data is received, a buffer for processing another video / audio data or non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means. If the spare time based on the capacity exceeds the expected time obtained from the step of estimating the processing time, control is performed so as to perform the reproduction and recording operations of the other discontinuous data. Reproducing disk control method characterized by comprising the extent, the. 21. The recording / reproducing disk control method according to claim 18, wherein the writing of the video / audio data stored in the input / output buffer means to the disk device is interrupted while the video / audio data is being recorded. To process other video / audio data or non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means when performing reproduction / recording processing of video / audio data or discontinuous data. Detecting that the margin time based on the free space of the buffer has become a fixed amount or less, and interrupting the pre-reading process of the other video / audio data or the reproduction / recording process of the discontinuous data in response to the detection result. Restarting the writing process of the video / audio data stored in the input / output buffer means to the disk device. Reproducing disk control method characterized by. 22. The recording / reproducing disk control method according to claim 20, further comprising interrupting a process of writing the video / audio data stored in the input / output buffer means to the disk device while recording the video / audio data. To process other video / audio data or non-continuous data obtained from the video / audio data amount that can be stored in the input / output buffer means when performing reproduction / recording processing of video / audio data or discontinuous data. The spare time based on the free space of the buffer of the other video and audio data or playback of non-continuous data,
When the recording process is interrupted and the time required for resuming the writing process of the video / audio data to the disk device becomes shorter than the expected time, the pre-reading process of the another video / audio data or the reproduction of the discontinuous data, A recording / reproducing disk control method, comprising a step of interrupting a recording process and resuming a process of writing the video / audio data stored in the input / output buffer means to a disk device. 23. A recording / reproducing disk device comprising a recording / reproducing disk control device for controlling a storage device for simultaneously transmitting / receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices, The recording / reproducing disk control device includes an input / output buffer means for temporarily storing data input from the outside or data read from the storage device, and another video / audio data or non-data When a continuous data playback or recording request is received,
When the video / audio data being reproduced has been pre-read and stored in the input / output buffer means by a predetermined amount, the reproduction / recording operation of another video / audio data or discontinuous data requested to be reproduced / recorded is performed. And a data recording / reproducing management means for controlling the recording / reproducing disk device. 24. A recording / reproducing disk device comprising a recording / reproducing disk control device for controlling a storage device for simultaneously transmitting and receiving a plurality of signals, video / audio data, and discontinuous data to / from a plurality of external devices, The recording / reproducing disk control device includes an input / output buffer means for temporarily storing data input from the outside or data read from the storage device, and another video signal while recording the video / audio data in the storage device. When a request for reproducing or recording audio data or discontinuous data is received, if the amount of video / audio data being recorded that has not been written to the storage device does not exceed a certain amount in the input / output buffer means, the reproduction is performed. A data recording / reproducing management means for controlling reproduction and recording operations of another video / audio data or discontinuous data which has received a recording request. A recording / reproducing disk device, comprising: