JP2009043303A - Method and device for recording video signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for recording a video signal, capable of correctly performing a continuous video signal recording operation by using the inner peripheral part of a hard disk even when a video signal to be processed has high specifications, and suppressing the performance of a hard disk drive as in a conventional manner. <P>SOLUTION: The storage area of a hard disk 30 is divided into three partitions, i.e., outer-peripheral partition 31, center-peripheral partition 32 and inner-peripheral partition 33. A file is changed each time the volume of video signals recorded in the hard disk 30 reaches a maximum file size 2 Gbytes, and a video signal is recorded in a HDD28 by alternately using the outer-peripheral partition 31 and inner-peripheral partition 33. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a video signal recording method and apparatus for recording a video signal on a disk recording medium whose recording speed decreases from the outer periphery to the inner periphery, such as a hard disk.

In a hard disk video recorder, an input video signal is compressed and encoded, and the encoded video signal is recorded on a hard disk. A hard disk drive (hereinafter referred to as HDD) that records a video signal on a hard disk is generally controlled by an OS (Operating System). The OS controls the file system under the management, and the file system puts the HDD under the management and performs file management at the time of recording and reproducing the video signal.
Under such OS management, file management is performed to manage the amount of recorded bytes of data when a file is accessed by the HDD. For example, in the case of a 32-bit system, if a 32-bit signed integer is used, the number of bytes of the file is represented by a value of 2 to the 31st power of 31 bits, so the maximum file size is limited to 2 GB. .

  In such a case, the video signal handled by the hard disk video recorder is changed from standard image quality to high image quality, the screen resolution is changed from standard to HD (high definition), and the frame rate is changed from standard to high frame rate. Then, the amount of data per unit time recorded on the hard disk increases and exceeds the maximum file size of 2 GB at the time of recording, so file division is necessary.

FIG. 4 is a flowchart showing an operation of dividing and recording a file.
As shown in FIG. 4, the hard disk video recorder writes the captured video signal to the hard disk for each frame size or specific size (MaxFS) (step S5). This operation is repeatedly looped (steps S5 to S13). During this loop, it is checked whether the file size being recorded does not exceed the maximum file size 2 GB (step S8), and before the file size is exceeded, the file is transferred to another file. The file migration is performed by closing the file currently being written (step S9), opening the file to be migrated next (step S10), and switching the file to be actually written (step S11).

FIG. 5 is a diagram showing the file migration operation on the time axis.
The file migration shown in FIG. 5 is performed before the file size to be recorded exceeds the maximum file size of 2 GB. This migration operation (steps S22 to S24, steps S25 to S27, and steps S28 to S30) is performed locally. The system load increases and a delay occurs in the recording operation. When there is no margin in the performance of the hard disk video recorder, the continuous recording operation of the video signal is hindered. Therefore, it is necessary to provide a sufficient margin in the performance of the hard disk video recorder, which increases the cost of the hard disk video recorder.

By the way, since recent HDDs are equipped with a built-in cache function and a high-speed interface, the access speed is high. However, when reading / writing continuous data to / from the HDD, the HDD rotates the disk at a constant speed and performs recording / reproduction on the disk with a magnetic head. The more data can be recorded, the more the inner circumference where the relative speed of the disk to the head is slower, the smaller the amount of data recorded.
Accordingly, in the case of a system in which the amount of data per unit time recorded on a hard disk drive (HDD) increases with the increase in specifications of the video signal, and continuous data recording / reproduction such as a video signal is required, There is a problem that the continuous recording / reproducing operation of the video signal is hindered because the continuous data read / write performance is inferior in the inner periphery of the HDD disk.
The HDD access speed may be used to mean the interface speed and the continuous data read / write speed.
The HDD access speed described below is used not to refer to the interface access speed but to the continuous data reading / writing speed of the hard disk drive (HDD).
Some conventional hard disk devices record high-speed moving image data on the outer periphery of the hard disk and store low-speed still image data on the inner periphery of the hard disk (for example, Patent Document 1).
JP 2000-339854 A

However, in the conventional hard disk video recorder, if the video signal to be handled is set to the high specification as described above, the continuous recording / reproducing operation of the video signal may be hindered in the inner periphery of the hard disk.
In order to solve this problem, it is necessary to provide a sufficient margin for the performance of the hard disk video recorder, which increases the cost of the hard disk video recorder.

  The present invention has been made in view of such circumstances, and an object of the present invention is to perform normal video signal continuous recording using the inner periphery of a hard disk even if the video signal to be handled has high specifications. An object of the present invention is to provide a video signal recording method and apparatus capable of suppressing the performance of a hard disk drive as before.

In order to achieve the above object, a video signal recording method of the present invention includes a disk drive unit that records a video signal in a file unit on a disk recording medium, and an access speed of the disk drive unit to the disk recording medium is the disk. A video signal recording method of a video signal recording apparatus, which is slowed down from the outer periphery to the inner periphery of the recording medium, when an operation mode for recording a video signal on the disk recording medium at a high speed is selected by the disk drive unit The recording area of the disk recording medium is divided into two partitions, an inner peripheral partition and an outer peripheral partition, and the file is changed each time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value. Alternating media inner and outer partitions Characterized in that to record the video signal by the disc drive unit using.
The video signal recording apparatus of the present invention includes a disk drive unit that records video signals on a disk recording medium in units of files, and a control unit that controls the operation of the disk drive unit. A video signal recording apparatus in which an access speed with respect to a disk recording medium becomes lower as the disk recording medium moves from an outer periphery to an inner periphery, wherein the control unit sends a video signal to the disk recording medium at a high speed by the disk drive unit. When an operation mode to be recorded is selected, the recording area of the disk recording medium is divided into two partitions, an inner partition and an outer partition, each time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value. And change the file to the inner partition of the disk recording medium. Characterized in that to record the video signal by the disc drive unit using the peripheral partition alternately.

The video signal recording method of the present invention further includes a disk drive unit that records video signals on a disk recording medium in units of files, and the access speed of the disk drive unit to the disk recording medium is from the outer periphery of the disk recording medium. A video signal recording method for a video signal recording apparatus, the speed of which decreases at an inner circumference, when the operation mode for recording a video signal on the disk recording medium at a high speed is selected by the disk drive unit. The recording area is divided into three partitions, an inner peripheral partition, an intermediate peripheral partition, and an outer peripheral partition from the inner periphery to the outer periphery, and the file is changed each time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value. Inner and outer partitions of the disk recording medium The video signal is recorded on the disk drive unit by alternately using partitions, and the video signal is recorded on the disk drive unit by using the middle partition after the inner and outer peripheral partitions are used. It is characterized by that.
The video signal recording apparatus of the present invention includes a disk drive unit that records video signals on a disk recording medium in units of files, and a control unit that controls the operation of the disk drive unit. A video signal recording apparatus in which an access speed with respect to a disk recording medium becomes lower as the disk recording medium moves from an outer periphery to an inner periphery, wherein the control unit sends a video signal to the disk recording medium at a high speed by the disk drive unit. When the recording operation mode is selected, the recording area of the disk recording medium is divided into three partitions, an inner peripheral partition, an intermediate peripheral partition, and an outer peripheral partition from the inner periphery to the outer periphery, and a video signal recorded on the disk recording medium Change the file each time the capacity of the file reaches the specified value The video signal is recorded on the disk drive unit by alternately using the inner and outer partitions of the disk recording medium, and after using the inner and outer partitions, the middle partition is used. A video signal is recorded on the disk drive unit.

The video signal recording method of the present invention also includes a disk drive unit for recording video signals on a disk recording medium in units of files, a video signal to be recorded on the disk recording medium, and a stored video signal. A video signal of a video signal recording apparatus in which the access speed of the disk drive unit to the disk recording medium decreases from the outer periphery to the inner periphery of the disk recording medium. In the recording method, when an operation mode for recording a video signal at a high speed on the disc recording medium is selected by the disc drive unit, a recording area of the disc recording medium is set to three or more plural pieces from the inner periphery to the outer periphery. The video signal capacity recorded on the disk recording medium is divided into partitions. When the value reaches the value, the capacity of the video signal stored in the buffer memory is compared with a first reference value, and when the capacity of the video signal stored in the buffer memory is equal to or greater than the first reference value, The file is changed to move to a partition on the outer peripheral side from the partition currently being recorded, and the video signal is recorded in the disk drive unit. The capacity of the video signal stored in the buffer memory is greater than the first reference value. If it is smaller, the capacity of the video signal stored in the buffer memory is compared with a second reference value less than or equal to the first reference value, and the capacity of the video signal stored in the buffer memory is a second reference value. If it is greater than the value, change the file and record the video signal in the same partition as the currently recorded partition on the disk drive unit, If the capacity of the video signal stored in the buffer memory is less than or equal to the second reference value, the file is changed, and the video signal is transferred to the inner peripheral partition from the partition currently being recorded and the video signal is transferred to the disk drive unit. It is made to record.
In addition, the video signal recording apparatus of the present invention encodes a video drive signal recorded on the disk recording medium into a disk drive unit that records the video signal on a disk recording medium in units of files, and an externally input video signal. An encoding unit; a buffer memory for temporarily storing the video signal encoded by the encoding unit; and supplying the stored video signal to the disk drive unit; the disk drive unit; the encoding unit; A control unit for controlling the operation of the buffer memory, and a video signal recording apparatus in which an access speed of the disk drive unit with respect to the disk recording medium decreases from an outer periphery to an inner periphery of the disk recording medium. The control unit records a video signal on the disk recording medium at a high speed by the disk drive unit. When the operation mode is selected, the recording area of the disk recording medium is divided into three or more partitions from the inner periphery to the outer periphery, and the capacity of the video signal recorded on the disk recording medium reaches a predetermined value. The capacity of the video signal stored in the buffer memory is compared with a first reference value, and if the capacity of the video signal stored in the buffer memory is greater than or equal to the first reference value, the file is changed. When the video signal is recorded on the disk drive unit by moving to a partition on the outer periphery side of the partition currently being recorded, and the capacity of the video signal stored in the buffer memory is smaller than the first reference value The capacity of the video signal stored in the buffer memory is compared with a second reference value equal to or less than the first reference value, and stored in the buffer memory If the capacity of the received video signal is larger than the second reference value, the file is changed and the video signal is recorded in the disk drive unit in the same partition as the partition currently being recorded, and stored in the buffer memory If the capacity of the video signal is less than or equal to the second reference value, the file is changed to shift to one inner peripheral partition from the partition currently being recorded, and the video signal is recorded in the disk drive unit. Features.

The video signal recording method of the present invention also includes a disk drive unit for recording video signals on a disk recording medium in units of files, a video signal to be recorded on the disk recording medium, and a stored video signal. A video signal of a video signal recording apparatus in which the access speed of the disk drive unit to the disk recording medium decreases from the outer periphery to the inner periphery of the disk recording medium. In the recording method, when an operation mode for recording a video signal at a high speed on the disc recording medium is selected by the disc drive unit, a recording area of the disc recording medium is set to three or more plural pieces from the inner periphery to the outer periphery. Divide into partitions and monitor the video signal capacity stored in the buffer memory When the capacity of the video signal stored in the buffer memory exceeds the first reference value, the file is changed and the video signal is transferred to a partition on the outer peripheral side from the currently recorded partition. When the capacity of the video signal recorded in the disk drive unit and stored in the buffer memory is less than the second reference value less than the first reference value, the file is changed and the current recording The video signal is recorded in the disk drive unit by moving to one inner peripheral partition from the partition, and the capacity of the video signal stored in the buffer memory is smaller than the first reference value and larger than the second reference. If it is large, the video signal is recorded on the disk drive unit in the same partition as the partition currently being recorded. To.
In addition, the video signal recording apparatus of the present invention encodes a video drive signal recorded on the disk recording medium into a disk drive unit that records the video signal on a disk recording medium in units of files, and an externally input video signal. An encoding unit; a buffer memory for temporarily storing the video signal encoded by the encoding unit; and supplying the stored video signal to the disk drive device; the disk drive unit; the encoding unit; A control unit for controlling the operation of the buffer memory, and a video signal recording apparatus in which an access speed of the disk drive unit with respect to the disk recording medium decreases from an outer periphery to an inner periphery of the disk recording medium. The control unit records video signals on the disk recording medium at a high speed by the disk drive unit. When the operation mode to be selected is selected, the recording area of the disk recording medium is divided into three or more partitions from the inner periphery to the outer periphery, the capacity of the video signal stored in the buffer memory is monitored, and the buffer memory When the capacity of the video signal stored in the disk becomes greater than or equal to the first reference value, the file is changed, and the video signal is transferred to the outer partition from the currently recorded partition and the video signal is transferred to the disk drive unit. When the capacity of the video signal stored in the buffer memory is less than the second reference value less than the first reference value, the file is changed and one is recorded from the partition currently being recorded. Video stored in the buffer memory by moving to the inner partition and recording the video signal in the disk drive unit If the capacity is greater than the first reference value smaller than the second reference of No., characterized in that to record the video signal on the disc drive unit in the same partition as the currently recorded in the partition.

According to the video signal recording method and apparatus of the present invention, when an operation mode for recording a video signal on the disk recording medium at a high speed is selected by the disk drive unit, the recording area of the disk recording medium is defined as an inner peripheral partition. It is divided into two partitions, the outer peripheral partition. The file is changed each time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, and the video signal is transmitted to the disk drive by alternately using the inner and outer partitions of the disk recording medium. To make a recording.
Therefore, by alternately using the inner peripheral partition with a low access speed to the disk recording medium and the outer peripheral partition with a high access speed to the disk recording medium, the lack of access speed of the inner peripheral partition can be In addition, the access speed to the disk recording medium can be averaged and used. For this reason, when video signals are continuously accessed to the inner periphery of a disk recording medium, even if the continuous recording of the video signals is hindered, a high-speed video signal using the inner and outer partitions is used. Can be accessed. Therefore, even when long time video signal recording is selected, continuous video recording can be performed without any problem. Further, it is not necessary to improve the access performance of the disk drive unit so that the video signal can be continuously accessed on the inner periphery of the disk recording medium, and the cost increase of the video signal recording apparatus can be suppressed.

According to the video signal recording method and apparatus of the present invention, when an operation mode for recording a video signal at a high speed on the disk recording medium is selected by the disk drive unit, the recording area of the disk recording medium is It is divided into three partitions from the inner periphery partition, the intermediate periphery partition, and the outer periphery partition from the outer periphery to the outer periphery. The file is changed each time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, and the video signal is transmitted to the disk drive by alternately using the inner and outer partitions of the disk recording medium. The video signal is recorded on the disk drive unit using the middle partition after the inner and outer partitions are used.
Therefore, by alternately using the inner peripheral partition with a low access speed to the disk recording medium and the outer peripheral partition with a high access speed to the disk recording medium, the lack of access speed of the inner peripheral partition can be In addition, the access speed to the disk recording medium can be averaged and used in the same manner as that of the middle partition. For this reason, even when the video signal is continuously accessed to the inner periphery of the disk recording medium, even if the continuous recording of the video signal is hindered, the inner and outer partitions are used alternately. The video signal access operation can be performed at a high access speed equivalent to that of the partition. Therefore, even when long time video signal recording is selected, continuous video recording can be performed without any problem. Further, it is not necessary to improve the access performance of the disk drive unit so that the video signal can be continuously accessed on the inner periphery of the disk recording medium, and the cost increase of the video signal recording apparatus can be suppressed.

According to the video signal recording method and apparatus of the present invention, when an operation mode for recording a video signal at a high speed on the disk recording medium is selected by the disk drive unit, the recording area of the disk recording medium is It is divided into three or more partitions from the outer periphery to the outer periphery. When the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, the capacity of the video signal stored in the buffer memory is compared with a first reference value and stored in the buffer memory. When the capacity of the video signal is equal to or greater than the first reference value, the file is changed, the partition is shifted to one outer peripheral side from the currently recorded partition, and the video signal is recorded in the disk drive unit, and the buffer If the capacity of the video signal stored in the memory is smaller than the first reference value, the capacity of the video signal stored in the buffer memory is compared with a second reference value equal to or less than the first reference value; If the capacity of the video signal stored in the buffer memory is larger than the second reference value, the file is changed and the same partition as the partition currently being recorded is used. When the video signal is recorded in the disk drive unit by the operation and the capacity of the video signal stored in the buffer memory is less than or equal to the second reference value, the file is changed and one of the partitions currently being recorded is stored. The video signal is recorded in the disk drive unit by moving to the peripheral partition.
Therefore, whenever the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, the capacity of the video signal stored in the buffer memory is detected, and when the capacity of the stored video signal is greater than or equal to the first reference value , Move to the outer partition where the access speed is faster, record the video signal, and if the accumulated video signal capacity is below the second reference value, move to the inner partition where the access speed is slower Thus, a video signal can be recorded. For this reason, even when the video signal is continuously accessed to the inner peripheral portion of the disk recording medium, even if it interferes with the continuous recording of the video signal, it is optimal according to the capacity of the video signal stored in the buffer memory. You can select and migrate partitions. Therefore, even when long time video signal recording is selected, continuous video recording can be performed without any problem. Further, it is not necessary to improve the access performance of the disk drive unit so that the video signal can be continuously accessed on the inner periphery of the disk recording medium, and the cost increase of the video signal recording apparatus can be suppressed.

According to the video signal recording method and apparatus of the present invention, when an operation mode for recording a video signal at a high speed on the disk recording medium is selected by the disk drive unit, the recording area of the disk recording medium is It is divided into three or more partitions from the outer periphery to the outer periphery. Then, the capacity of the video signal stored in the buffer memory is monitored, and when the capacity of the video signal stored in the buffer memory exceeds the first reference value, the file is changed and the current recording is in progress. The video signal is recorded in the disk drive unit by moving to a partition on the outer peripheral side from the first partition, and the capacity of the video signal stored in the buffer memory is equal to or less than a second reference value equal to or less than the first reference value. In this case, the file is changed, and the partition that is currently recorded is shifted to one inner peripheral partition to record the video signal in the disk drive unit, and the video signal stored in the buffer memory is recorded. When the capacity is smaller than the first reference value and larger than the second reference value, the same partition as the partition currently being recorded is used. Emissions at records the video signal on the disk drive unit.
For this reason, the capacity of the video signal stored in the buffer memory is constantly monitored, and when the capacity of the stored video signal is equal to or higher than the first reference value, the video signal is transferred to the outer partition having a higher access speed. When the capacity of the accumulated video signal is less than or equal to the second reference value, the video signal can be recorded by moving to an inner peripheral partition having a lower access speed. For this reason, even when the video signal is continuously accessed to the inner peripheral portion of the disk recording medium, even if it interferes with the continuous recording of the video signal, it is optimal according to the capacity of the video signal stored in the buffer memory. You can select and migrate partitions. Therefore, even when long time video signal recording is selected, continuous video recording can be performed without any problem. Further, it is not necessary to improve the access performance of the disk drive unit so that the video signal can be continuously accessed on the inner periphery of the disk recording medium, and the cost increase of the video signal recording apparatus can be suppressed.

Embodiments of a hard disk video recorder to which the video signal recording method and apparatus of the present invention are applied will be described below with reference to the drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of the hard disk video recorder of the first embodiment.
As shown in FIG. 1, the hard disk video recorder includes a video input unit 12, a video synchronization unit 14, a video output unit 16, an encoding unit 18, a decoding unit 20, a system control unit 22, a file system 24, a buffer memory 26, and An HDD 28 is provided.

  The video input unit 12 inputs a video signal from the outside. For example, when the input video signal is an analog signal, the video input unit 12 performs A / D conversion to convert it into a digital signal. When the input signal is an RGB signal, the RGB signal is converted into a YCrCb signal. The video synchronization unit 14 synchronizes the input video signal and adds various signals such as a vertical synchronization signal, a horizontal synchronization signal, and a clock signal to the video signal. The encoding unit 18 compresses and encodes the video signal input by the video input unit 12 when the video signal is recorded. The video signal encoded by the encoding unit 18 is temporarily stored in the buffer memory 26 and supplied to the HDD 28.

  The HDD 28 records the video signal supplied from the buffer memory 26 on the hard disk 30 when recording the video signal, reads the video signal recorded on the hard disk 30 when reproducing the video signal, and buffers the read video signal. The video signal is reproduced by supplying it to the memory 26. The buffer memory 26 temporarily stores the video signal encoded by the encoding unit 18 when the video signal is recorded, and supplies the video signal to the HDD 28. When reproducing the video signal, the buffer memory 26 reads the video signal read from the hard disk 30 by the HDD 28. Is temporarily stored and output to the decoding unit 20.

  The decoding unit 20 decodes the video signal read from the hard disk 30 by the HDD 28 during reproduction of the video signal. The video output unit 16 adds a synchronization signal or the like to the video signal decoded by the decoding unit 230 in cooperation with the video synchronization unit 14 and outputs the video signal to the outside.

  The system control unit 22 controls the entire apparatus, and includes, for example, a microcomputer having a CPU, a ROM, a RAM, and a peripheral circuit interface. The file system 24 manages the file when the HDD 28 is under management and a video signal divided into a certain data size is recorded and reproduced on the hard disk 30.

Next, a video signal recording method of the hard disk video recorder will be described.
During recording by the hard disk video recorder, the video signal input from the video input unit 12 and encoded by the encoding unit 18 is temporarily stored in the buffer memory 26 and supplied to the HDD 28. The HDD 28 is controlled by the system control unit 22 and the file system 24, and a video signal is recorded on the hard disk 30 by the following operation.

When video signals are recorded, file division is performed. It is assumed that the video signal is represented by a 32-bit signed integer and the maximum file size is limited to 2 GB.
Here, as the video signal recording operation mode, a high-speed operation mode such as changing from standard image quality to high image quality, changing the screen resolution from standard to HD (high definition), or changing the frame rate from standard to high frame rate is selected. Shall be.
When the high-speed operation mode is selected, it is assumed that the video signal writing speed is slower than the encoding speed of the encoding section 18 (in the case of a fixed bit rate) in the innermost periphery of the hard disk 30.

FIG. 2 is a diagram illustrating an example of a method for dividing the storage area of the hard disk.
When the high-speed operation mode is selected at the time of recording by the hard disk video recorder, the storage area of the hard disk 30 is moved from the outer periphery to the inner periphery of the hard disk 30 by the system control unit 22 and the file system 24 as shown in FIG. It is divided into three partitions, a peripheral partition 32 and an inner peripheral partition 33.

First, a file 1 is created in the outer peripheral partition 31, and recording of a video signal is started. At this time, since the continuous writing speed of the HDD 28 in the outer peripheral partition 31 is faster than the encoding speed of the video signal, the video signal does not accumulate in the buffer memory 26.
Next, when the file 1 reaches the maximum file size 2 GB, the file is changed. File 1 is closed and file 2 is opened. At this time, the file 2 is opened in the inner partition 33 and a video signal is recorded. Since the continuous writing speed of the HDD 28 in the inner peripheral partition 33 is slower than the video signal encoding speed, the video signal accumulates in the buffer memory 26.

Next, when the file 2 reaches the maximum file size 2 GB, the file is changed. File 2 is closed and file 3 is opened. At this time, the file 3 is opened in the outer peripheral partition 31, and a video signal is recorded. Since the continuous writing speed of the HDD 28 in the outer peripheral partition 31 is faster than the video signal encoding speed, the video signal accumulated in the buffer memory 26 decreases.
Thereafter, every time the file 2 reaches the maximum file size 2 GB, the inner partition 33 and the outer partition 31 are alternately used to record a video signal. After the use of these partitions 31, 33, the middle partition 32 Used to record a video signal. Since the continuous writing speed of the HDD 28 in the middle partition 32 is faster than the encoding speed of the video signal, the video signal does not accumulate in the buffer memory 26.
It should be noted that when the video signal is reproduced, the same operation as that during recording is repeated.

  As described above, according to the hard disk video recorder of the first embodiment, every time the capacity of the video signal recorded on the hard disk 30 reaches the maximum file size 2 GB, the file is changed and the outer peripheral partition 31 and the inner peripheral partition 33 are alternated. The video signal is recorded on the HDD 28 and the video signal is recorded on the HDD 28 using the middle partition 32 after the outer peripheral partition 31 and the inner peripheral partition 33 are used.

  For this reason, by alternately using the inner peripheral partition 33 having a low access speed and the outer peripheral partition 33 having a high access speed, the shortage of the access speed of the inner peripheral partition 33 is compensated by the outer peripheral partition 31 of the high speed access. The access speed can be averaged and used in the same manner as the middle partition 32. For this reason, even when the video signal is continuously accessed to the inner peripheral portion of the hard disk 30, even if the continuous recording of the video signal is hindered, the inner partition 33 and the outer partition 31 are used alternately. The video signal access operation can be performed at an access speed equivalent to that of the middle partition 32. Therefore, even when long-time recording of a high-speed video signal is selected, continuous recording can be performed without any trouble. Further, it is not necessary to improve the access performance of the HDD 28 so that the video signal can be continuously accessed in the inner periphery of the hard disk 30, and the cost increase of the video signal recording apparatus can be suppressed.

  In the first embodiment, the file is changed every time the file 2 reaches the maximum file size 2 GB, but the file change is not limited to each maximum file size 2 GB. For example, in consideration of the size of the buffer memory 26 and the like, the file may be changed for each fixed value determined appropriately such as several tens of megabytes or several hundred megabytes.

  In the first embodiment, the storage area of the hard disk 30 is divided into the three partitions of the outer peripheral partition 31, the intermediate peripheral partition 32, and the inner peripheral partition 33. However, the storage area of the hard disk 30 is divided into two partitions, the outer peripheral partition and the inner peripheral partition. Even if the video signal is recorded by dividing the partition into two partitions and alternately using the outer peripheral partition and the inner peripheral partition for each file change, the same effect can be obtained.

(Embodiment 2)
In the hard disk video recorder of the second embodiment, when the high-speed operation mode is selected as in the hard disk video recorder of the first embodiment, the storage area of the hard disk 30 is set from the outer periphery of the hard disk 30 by the system control unit 22 and the file system 24. The inner partition is divided into three partitions, an outer peripheral partition 31, an intermediate peripheral partition 32, and an inner peripheral partition 33, but the subsequent operations are different.
Hereinafter, the subsequent operation will be described.

  First, the file 1 is created in the inner partition 33, and recording of a video signal is started. Since the continuous writing speed of the HDD 28 in the inner peripheral partition 33 is slower than the video signal encoding speed, the video signal accumulates in the buffer memory 26.

Next, when the file 1 reaches the maximum file size 2 GB, the file is changed. File 1 is closed and file 2 is opened. At this time, the capacity of the video signal stored in the buffer memory 26 is detected.
The capacity of the video signal stored in the buffer memory 26 is compared with the first reference value. If the capacity of the video signal stored in the buffer memory 26 is equal to or greater than the first reference value, the current recording is being performed. The file 2 is opened after moving from the partition (inner peripheral partition 33) to the outer peripheral partition (intermediate partition 32), and a video signal is recorded. On the other hand, when the capacity of the video signal stored in the buffer memory 26 is smaller than the first reference value, the file 2 is opened in the same inner partition 33 and the video signal is recorded. Here, it is assumed that the file 2 is opened after moving to the middle partition 32.

Next, when the file 2 reaches the maximum file size 2 GB, the file is changed. File 2 is closed and file 3 is opened. At this time, the capacity of the video signal stored in the buffer memory 26 is detected.
The capacity of the video signal stored in the buffer memory 26 is compared with the first reference value. If the capacity of the video signal stored in the buffer memory 26 is equal to or greater than the first reference value, the current recording is being performed. The file 3 is opened after moving from the partition (intermediate partition 32) to the outer partition (outer partition 31), and a video signal is recorded.

  On the other hand, when the capacity of the video signal stored in the buffer memory 26 is smaller than the first reference value, the capacity of the video signal stored in the buffer memory 26 is less than the first reference value and the second reference value. To be compared. When the capacity of the video signal stored in the buffer memory 26 is larger than the second reference value, the file 3 is opened and the video signal is recorded in the same partition as the partition currently being recorded (middle partition 32). On the other hand, when the capacity of the video signal stored in the buffer memory 26 is equal to or smaller than the second reference value, the video signal is transferred to the inner peripheral partition (inner peripheral partition 33) from the partition currently being recorded. Is recorded.

Thereafter, every time the file 2 reaches the maximum file size 2 GB, the capacity of the video signal stored in the buffer memory 26 is detected, and when the capacity of the video signal stored in the buffer memory 26 is equal to or larger than the first reference value, When the file is opened by moving to a partition on the outer circumference side from the partition currently being recorded and the capacity of the video signal stored in the buffer memory 26 is equal to or smaller than the second reference value, the partition currently being recorded When the file is opened by moving to the inner partition and the capacity of the video signal stored in the buffer memory 26 is larger than the second reference value and smaller than the first reference value, the current recording is performed. The file is opened in the middle partition and the video signal is recorded.
It should be noted that when the video signal is reproduced, the same operation as that during recording is repeated.

  As described above, according to the hard disk video recorder of the second embodiment, every time the capacity of the video signal recorded on the hard disk 30 reaches the maximum file size 2 GB, the capacity of the video signal stored in the buffer memory 26 is detected and stored. When the capacity of the recorded video signal is equal to or higher than the first reference value, the video signal is recorded by moving to the outer partition having a higher access speed, and when the capacity of the accumulated video signal is equal to or lower than the second reference value. Then, the video signal is recorded by moving to an inner peripheral partition having a lower access speed.

  For this reason, even when a video signal is continuously accessed to the inner peripheral portion of the hard disk 30, even if the continuous recording of the video signal is hindered, the optimum value is determined according to the capacity of the video signal stored in the buffer memory 26. You can select and migrate partitions. Therefore, even when long time video signal recording is selected, continuous video recording can be performed without any problem. Further, it is not necessary to improve the access performance of the HDD 28 so that the video signal can be continuously accessed in the inner periphery of the hard disk 30, and the cost increase of the video signal recording apparatus can be suppressed.

  In the second embodiment, the file change is performed every time the file 2 reaches the maximum file size 2 GB, but the file change is not limited to each maximum file size 2 GB. For example, in consideration of the size of the buffer memory 26 and the like, the file may be changed for each fixed value determined appropriately such as several tens of megabytes or several hundreds of megabytes.

In the second embodiment, the storage area of the hard disk 30 is divided into three partitions 3132 and 33. However, if the number of partitions to be divided is increased, more appropriate partition migration can be realized.
FIG. 3 is a diagram showing another example of the method for dividing the storage area of the hard disk.
In FIG. 3, the storage area of the hard disk 30 is equally divided into 41 (42, 43,..., 44) partitions of M (here, an integer of 4 or more).

Further, when the encoding by the encoding unit 18 is a variable bit rate, the system control unit 22 and the file system 24 control the generated code amount of the encoding unit 18 to control the capacity of the video signal stored in the buffer memory 26. can do.
For example, the system control unit 22 and the file system 24 detect the capacity of the video signal stored in the buffer memory 26, and when the capacity of the stored video signal is equal to or greater than the first reference value, the compression rate of the encoding unit 18 The amount of generated code of the encoding unit 18 is reduced by increasing the encoding amount, and when the capacity of the accumulated video signal is equal to or smaller than the second reference value, the encoding unit 18 is reduced by reducing the compression rate of the encoding unit 18 or the like. The generated code amount of 18 is increased.
Further, only when the outermost partition is used, when the capacity of the accumulated video signal is greater than or equal to the first reference value, control is performed to reduce the generated code amount of the encoding unit 18, or the Only when the inner partition is used, when the capacity of the accumulated video signal is equal to or smaller than the second reference value, the generated code amount of the encoding unit 18 is increased. Code amount control can be used as appropriate.

(Embodiment 3)
The hard disk video recorder of the third embodiment has the same configuration as that of the hard disk video recorder of the second embodiment. However, when the high-speed operation mode is selected, the video signal stored in the buffer memory 26 is always monitored, The difference is that partitions are migrated regardless of file size.

  When the high-speed operation mode is selected, the recording area of the hard disk 30 is divided into three or more partitions from the inner periphery to the outer periphery. Then, the capacity of the video signal stored in the buffer memory 26 is monitored, and if the capacity of the video signal stored in the buffer memory 26 exceeds the first reference value, the file is changed regardless of the file size. The video signal is recorded by moving to a partition on the outer peripheral side from the partition currently being recorded. When the capacity of the video signal stored in the buffer memory 26 becomes equal to or smaller than the second reference value equal to or smaller than the first reference value, the file is changed regardless of the file size, and the current recording partition is changed. The video signal is recorded by moving to one inner partition. When the capacity of the video signal stored in the buffer memory 26 is smaller than the first reference value and larger than the second reference value, the video signal is recorded in the same partition as the partition currently being recorded.

  For this reason, the capacity of the video signal stored in the buffer memory 26 is constantly monitored, and when the capacity of the stored video signal is equal to or greater than the first reference value, the video is transferred to the outer peripheral partition with higher access speed. When the signal is recorded and the capacity of the accumulated video signal is less than or equal to the second reference value, the video signal can be recorded by moving to an inner peripheral partition having a lower access speed. For this reason, even when the video signal is continuously accessed to the inner peripheral portion of the disk recording medium, even if it interferes with the continuous recording of the video signal, it is optimal according to the capacity of the video signal stored in the buffer memory. You can select and migrate partitions. Therefore, even when long time video signal recording is selected, continuous video recording can be performed without any problem. Further, it is not necessary to improve the access performance of the HDD 28 so that the video signal can be continuously accessed in the inner periphery of the hard disk 30, and the cost increase of the video signal recording apparatus can be suppressed.

Further, when the encoding by the encoding unit 18 is a variable bit rate, the system control unit 22 and the file system 24 control the generated code amount of the encoding unit 18 to control the capacity of the video signal stored in the buffer memory 26. can do.
For example, the system control unit 22 and the file system 24 monitor the capacity of the video signal stored in the buffer memory 26, and when the capacity of the stored video signal is equal to or greater than the first reference value, the compression rate of the encoding unit 18 The amount of generated code of the encoding unit 18 is reduced by increasing the encoding amount, and when the capacity of the accumulated video signal is equal to or smaller than the second reference value, the encoding unit 18 is reduced by reducing the compression rate of the encoding unit 18 or the like. The generated code amount of 18 is increased.
Further, only when the outermost partition is used, when the capacity of the accumulated video signal is greater than or equal to the first reference value, control is performed to reduce the generated code amount of the encoding unit 18, or the Only when the inner partition is used, when the capacity of the accumulated video signal is equal to or smaller than the second reference value, the generated code amount of the encoding unit 18 is increased. Code amount control can be used as appropriate.

  In the first to third embodiments, the video signal is recorded on the hard disk 30 by the HDD 28. However, the disk recording medium and its drive device are not limited to the hard disk 30 and the HDD 28, and the disk recording medium is accessed. The present invention is applied to a disk recording medium in which the speed decreases from the outer circumference to the inner circumference and the drive device thereof.

1 is a block diagram showing a configuration of a hard disk video recorder of Embodiment 1. FIG. It is a figure which shows an example of the division | segmentation method of the storage area of a hard disk. It is a figure which shows the other example of the division | segmentation method of the storage area of a hard disk. It is a flowchart which shows the operation | movement which divides and records a file. It is the figure which looked at the operation | movement of file migration on the time-axis.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 12 ... Video input part, 14 ... Video synchronization part, 16 ... Video output part, 18 ... Encoding part, 20 ... Decoding part, 22 ... System control part, 24 ... File system, 26 ... Buffer memory, 28 ... HDD, 30 ... hard disk.

Claims (13)

Having a disk drive unit for recording video signals in units of files on a disk recording medium;
A video signal recording method for a video signal recording apparatus, wherein an access speed of the disk drive unit with respect to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When an operation mode for recording a video signal on the disk recording medium at a high speed is selected by the disk drive unit, the recording area of the disk recording medium is divided into two partitions, an inner peripheral partition and an outer peripheral partition, and the disk recording The file is changed each time the capacity of the video signal recorded on the medium reaches a predetermined value, and the video signal is recorded by the disk drive unit using the inner and outer partitions of the disk recording medium alternately.
A video signal recording method. A disk drive unit for recording video signals on a disk recording medium in units of files;
A control unit for controlling the operation of the disk drive unit,
A video signal recording apparatus in which an access speed of the disk drive unit to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When the operation mode for recording a video signal at a high speed on the disk recording medium is selected by the disk drive unit, the control unit may divide the recording area of the disk recording medium into two partitions, an inner peripheral partition and an outer peripheral partition. Each time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, the file is changed to alternately use the inner and outer partitions of the disk recording medium to send the video signal to the disk drive. To record by
A video signal recording apparatus. Having a disk drive unit for recording video signals in units of files on a disk recording medium;
A video signal recording method for a video signal recording apparatus, wherein an access speed of the disk drive unit with respect to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When an operation mode for recording a video signal on the disk recording medium at a high speed is selected by the disk drive unit, the recording area of the disk recording medium is divided into an inner peripheral partition, an intermediate peripheral partition, and an outer peripheral partition from the inner periphery to the outer periphery. Divided into two partitions, each time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, the file is changed to alternately use the inner and outer partitions of the disk recording medium to Recording on the disk drive unit, and after using the inner and outer peripheral partitions, the video signal is recorded on the disk drive unit using the middle partition,
A video signal recording method. A disk drive unit for recording video signals on a disk recording medium in units of files;
A control unit for controlling the operation of the disk drive unit,
A video signal recording apparatus in which an access speed of the disk drive unit to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When the operation mode for recording a video signal on the disk recording medium at a high speed is selected by the disk drive unit, the control unit is configured to change the recording area of the disk recording medium from an inner periphery to an outer periphery, an inner peripheral partition, an intermediate peripheral partition And the outer partition and the outer partition are divided into three partitions, and the file is changed every time the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, and the inner and outer partitions of the disk recording medium are used alternately. Then, the video signal is recorded in the disk drive unit, and after using the inner and outer peripheral partitions, the video signal is recorded in the disk drive unit using the middle partition.
A video signal recording apparatus. A disk drive unit for recording video signals on a disk recording medium in units of files;
A buffer memory for temporarily storing video signals to be recorded on the disk recording medium and supplying the stored video signals to the disk drive unit;
A video signal recording method for a video signal recording apparatus, wherein an access speed of the disk drive unit with respect to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When an operation mode for recording a video signal at a high speed on the disk recording medium is selected by the disk drive unit, a recording area of the disk recording medium is divided into three or more partitions from an inner periphery to an outer periphery, and the disk When the capacity of the video signal recorded on the recording medium reaches a predetermined value, the capacity of the video signal stored in the buffer memory is compared with the first reference value by comparing the capacity of the video signal stored in the buffer memory with the first reference value. Is equal to or greater than the first reference value, the file is changed, and the video signal is recorded in the disk drive unit and transferred to the outer partition from the currently recorded partition, and stored in the buffer memory. If the capacity of the video signal is smaller than the first reference value, the capacity of the video signal stored in the buffer memory is Is compared with a second reference value equal to or less than the first reference value, and if the capacity of the video signal stored in the buffer memory is larger than the second reference value, the file is changed and the current recording When the video signal is recorded in the disk drive unit in the same partition as the partition, and the capacity of the video signal stored in the buffer memory is equal to or less than the second reference value, the file is changed and the current recording partition is used. Shift to one inner peripheral partition and record the video signal in the disk drive unit,
A video signal recording method. A disk drive unit for recording video signals on a disk recording medium in units of files;
An encoding unit that encodes an externally input video signal into a video signal recorded on the disk recording medium;
A buffer memory for temporarily storing the video signal encoded by the encoding unit and supplying the stored video signal to the disk drive unit;
A control unit for controlling the operation of the disk drive unit, the encoding unit, and the buffer memory;
A video signal recording apparatus in which an access speed of the disk drive unit to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When the operation mode for recording a video signal at a high speed on the disc recording medium is selected by the disc drive unit, the control unit has a plurality of three or more partitions from the inner circumference to the outer circumference of the recording area of the disc recording medium. When the capacity of the video signal recorded on the disk recording medium reaches a predetermined value, the capacity of the video signal stored in the buffer memory is compared with a first reference value and stored in the buffer memory. If the capacity of the video signal is greater than or equal to the first reference value, the file is changed and the video signal is recorded on the disk drive unit by moving to a partition on the outer circumference side of the partition currently being recorded, When the capacity of the video signal stored in the buffer memory is smaller than the first reference value, it is stored in the buffer memory. The capacity of the video signal is compared with a second reference value equal to or less than the first reference value. If the capacity of the video signal stored in the buffer memory is larger than the second reference value, the file is changed. When the video signal is recorded in the disk drive unit in the same partition as the current recording partition and the capacity of the video signal stored in the buffer memory is less than or equal to the second reference value, the file is changed and the current recording is performed The video signal is recorded on the disk drive unit by moving to one inner partition from the inside partition,
A video signal recording apparatus.   7. The video signal recording apparatus according to claim 2, wherein the predetermined value is a maximum file size that can be recorded by the disk drive unit.   7. The video signal recording apparatus according to claim 2, wherein the predetermined value is smaller than a maximum file size that can be recorded by the disk drive unit.   The control unit compares the capacity of the video signal stored in the buffer memory with a first reference value when encoding by the encoding unit is a variable bit rate, and stores the video signal stored in the buffer memory. Is equal to or greater than a first reference value, the encoding unit is controlled so that the amount of generated code by the encoding unit is small, and the encoding by the encoding unit is a variable bit rate, and The capacity of the video signal stored in the buffer memory is compared with a second reference value, and when the capacity of the video signal stored in the buffer memory is equal to or less than the second reference value, the encoding unit generates 7. The video signal recording apparatus according to claim 6, wherein the encoding unit is controlled so that a code amount increases. A disk drive unit for recording video signals on a disk recording medium in units of files;
A buffer memory for temporarily storing video signals to be recorded on the disk recording medium and supplying the stored video signals to the disk drive unit;
A video signal recording method for a video signal recording apparatus, wherein an access speed of the disk drive unit with respect to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When an operation mode for recording a video signal on the disk recording medium at a high speed is selected by the disk drive unit, a recording area of the disk recording medium is divided into three or more partitions from an inner periphery to an outer periphery, and the buffer The capacity of the video signal stored in the memory is monitored, and when the capacity of the video signal stored in the buffer memory exceeds the first reference value, the file is changed and 1 is recorded from the partition currently being recorded. When the video signal is recorded in the disk drive unit and the capacity of the video signal stored in the buffer memory is less than the second reference value less than the first reference value. To change the file, move to the inner partition one partition from the currently recorded partition and output the video signal. When the capacity of the video signal recorded in the disk drive unit and stored in the buffer memory is smaller than the first reference value and larger than the second reference value, the video signal is recorded in the same partition as the currently recorded partition. Is recorded on the disk drive unit,
A video signal recording method. A disk drive unit that records video signals on a disk recording medium in units of files;
An encoding unit that encodes an externally input video signal into a video signal recorded on the disk recording medium;
A buffer memory for temporarily storing the video signal encoded by the encoding unit and supplying the stored video signal to the disk drive device;
A control unit for controlling the operation of the disk drive unit, the encoding unit, and the buffer memory;
A video signal recording apparatus in which an access speed of the disk drive unit to the disk recording medium is reduced as it goes from an outer periphery to an inner periphery of the disk recording medium,
When the operation mode for recording a video signal at a high speed on the disc recording medium is selected by the disc drive unit, the control unit has a plurality of three or more partitions from the inner circumference to the outer circumference of the recording area of the disc recording medium. The capacity of the video signal stored in the buffer memory is monitored, and if the capacity of the video signal stored in the buffer memory exceeds the first reference value, the file is changed and the current recording is performed. A second reference value in which the capacity of the video signal stored in the buffer memory is less than or equal to the first reference value by moving to one of the outer peripheral partitions from the middle partition and recording the video signal in the disk drive unit If any of the following occurs, change the file and move to a partition on the inner circumference side of the partition currently being recorded. When the video signal is recorded in the disk drive unit and the capacity of the video signal stored in the buffer memory is smaller than the first reference value and larger than the second reference value, the same partition as the partition currently being recorded To record the video signal in the disk drive unit,
A video signal recording apparatus.   12. The video signal recording apparatus according to claim 2, wherein the disk recording medium is a hard disk.   When the encoding by the encoding unit is a variable bit rate and the capacity of the video signal stored in the buffer memory is equal to or greater than a first reference value, the control unit The encoding unit is controlled so as to reduce the generated code amount, and when the encoding by the encoding unit is a variable bit rate, and the capacity of the video signal stored in the buffer memory is less than or equal to a second reference value 12. The video signal recording apparatus according to claim 11, wherein in the case of becoming, the encoding unit is controlled so that a generated code amount by the encoding unit becomes large.

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