JPH11144391A - Disk-like recording medium, disk recording and reproducing device using the medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate satisfactorily at high speed the data reproduction of a video material by using a low cost structure. SOLUTION: The data of a video material are grounded for each prescribed frame numbers to form unit blocks B0, B1, B2,.... In the unit block, frames are rearranged so that the data of the video material required according to the reproducing speed are continuous in the section extending over two continuous unit blocks. In this case, when the data is continuously read out from the frame '1' to the frame '17' which extend over the unit blocks B0, B1, the data so read out becomes the data of every other frame to enable smooth double speed reproduction by using this data. When the data is continuously read out from the frame '3' to the frame '19' which extend over the unit blocks B0, B1, the data are spaced at every four frames to enable smooth quadruple speed reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk-shaped recording medium and a disk recording apparatus and a disk reproducing apparatus using the same. More specifically, the video material data is recorded as a unit block for each predetermined number of frames, and within the unit block, the video material data required according to the reproduction speed spans two consecutive unit blocks. The frames are rearranged so as to be continuous in the section, and are recorded on the disk-shaped recording medium. When the disc-shaped recording medium is reproduced, a read section corresponding to the reproduction speed is set over two consecutive unit blocks, and data in the read section is continuously read from the disc-shaped recording medium by the reading means. Therefore, it is not necessary to move the data reading position of the reading means for each unit block, and the video material can be easily and satisfactorily reproduced at high speed.

[0002]

2. Description of the Related Art Disk-shaped recording media (hereinafter, "disks") such as optical disks, magneto-optical disks, and magnetic disks
When reproducing the video material recorded at the same time, not only standard speed (1 × speed) reproduction but also high-speed search is performed to quickly select a desired scene. Also, for example, when editing using this video material, not only a standard-speed playback image but also a playback image obtained by increasing the playback speed are used as editing contents, so that the edited image can be varied and changed. It can be rich.

[0003] In the case of performing high-speed reproduction in this way, it is desired to obtain a reproduced image with natural and smooth motion and a reproduced sound from which the contents can be easily heard. For this reason, for example, in order to realize smooth high-speed reproduction with smooth motion, a method of extracting data one frame at a time at predetermined intervals and performing intermittent reproduction is considered to be optimal.

[0004]

In a disk apparatus for recording video material and the like using a disk, data is recorded on the disk in the order of input (time code order). When data is extracted one frame at a time and intermittently reproduced, a seek operation to the next frame occurs every time data of one frame is read, and data reading is delayed and a reproduced image is interrupted. There is a risk.

In addition, when a plurality of frames are continuously read so as not to cause a discontinuity in a reproduced image, the frequency of a seek operation is reduced, and when pseudo high-speed reproduction is performed, continuous reading is performed. Since the outputted images of a plurality of frames are reproduced images at the standard speed, the reproduced images at the standard speed are displayed discontinuously, and a natural image with smooth motion cannot be obtained.

For example, FIG. 14 is a diagram showing a double speed reproduction operation. When the data of the video material shown in FIG. 14A (the number in FIG. 14A indicates a frame number) is thinned out for each frame and read out, and reproduced at twice the standard speed, for example, a solid line in FIG. 14B is shown. After the reading of the data of the even-numbered frame is completed, the seek time for moving the pickup unit for reading the data from the disk to move the data reading position to the position of the next even-numbered frame as shown by the broken line Then, a rotation waiting time (the maximum rotation waiting time is equal to one rotation of the disk) is required until the disk is rotated and the data reading position of the pickup unit is set to the head position of the next even-numbered frame. In addition, the time obtained by adding the seek time and the rotation waiting time is defined as the positioning time. For this reason, each time one frame of data is read, a positioning time is generated, and high-speed reproduction becomes extremely difficult.

Therefore, when the data of the video material shown in FIG. 15A is read out continuously for four frames and the data of the subsequent four frames is thinned out to perform double-speed reproduction, for example, as shown by a solid line in FIG. When the data of "0" to frame "3" are read and the frames "4" to "7" are thinned out as indicated by the broken line, the number of movements of the data reading position is 4 in FIG.
That is, it is possible to easily perform high-speed reproduction.
However, since four frames of data are continuous,
The reproduced images at the standard speed for the frames are displayed discontinuously. For this reason, it is not possible to obtain a high-speed playback image with smooth motion.

Further, a disk array is formed by connecting a plurality of disk storage devices using a hard disk or the like from which data can be read quickly, and one video material is divided into frames and recorded on separate devices. In such a case, a method for preparing for reading the next data during a period in which data is being read by one device is performed, thereby shortening a time required until the data can be read. Is also used. However, this method cannot be introduced into a system in which a small number of inexpensive disk storage devices are connected or only one is inexpensive, or a disk device using one removable disk that can be removed and carried.

In view of the above, the present invention provides a disk-shaped recording medium capable of easily and satisfactorily high-speed reproduction of video material data with an inexpensive configuration, and a disk recording apparatus and a disk reproducing apparatus using the same. It is.

[0010]

In a disk-shaped recording medium according to the present invention, data of a video material is formed into a unit block for each predetermined number of frames, and in the unit block, a video required according to a reproduction speed is required. Material data is continuous 2
The frames are rearranged so as to be continuous in a section extending over one unit block, and the data of the video material is recorded. The video material data is composed of video data and audio data. The video data and the audio data are separated in a unit block, and the positions of the video data and the audio data are switched between the odd-numbered unit block and the even-numbered unit block. In this case, the frames of the video data are rearranged in the unit block. further,
Within the unit block, the audio data frames are rearranged so that the video data and audio data of the video material required according to the playback speed are continuous in the section that spans the separated video data and audio data. It is a thing.

In the disk recording apparatus according to the present invention, the data of the video material to be recorded is made into a unit block for every predetermined number of frames, and the data of the video material required according to the reproduction speed is converted into two continuous unit blocks. Data processing means for rearranging frames in a unit block so as to be continuous in a section extending over the same, and recording means for recording data of video material rearranged by the data processing means on a disk-shaped recording medium. Things. The data processing means has a memory, and sequentially writes the data of the video material to be recorded in the memory, and controls the reading order of the data written in the memory to rearrange the frames of the video material.

A disk reproducing apparatus according to the present invention sets reading means for reading data recorded on a disk-shaped recording medium, and sets a reading section extending over two consecutive unit blocks in accordance with a reproducing speed. Control means for controlling the reading means so as to continuously read data from the disk-shaped recording medium. A reading section for reading data recorded on the disk-shaped recording medium; and a reading section set according to a reproduction speed and an audio mode.
Control means for controlling the reading means so as to continuously read the data in the reading section from the disk-shaped recording medium. In addition, there is provided a pitch varying means for using the audio data of the two unit blocks read by the reading means to generate an audio signal whose pitch is varied according to the reproduction speed.

In the present invention, data of video material is recorded as a unit block for each predetermined number of frames, and recorded.
In the unit block, the frames are rearranged so that the data of the video material required according to the reproduction speed is continuous in a section extending over two consecutive unit blocks, and is recorded on the disk-shaped recording medium. . For example, in double-speed playback, every other frame of data is required, and rearrangement is performed such that every other frame of data in a unit block and every other frame of the next unit block are continuous.

When the video data and the audio data, which are the data of the video material, are separated in the unit block, the video data is similarly rearranged, and the audio data is, for example, the reverse of the video data. Sorted in order.

When reproducing the disc-shaped recording medium, a read section corresponding to the reproduction speed is set over two consecutive unit blocks to read data. For example, in double-speed playback, every other frame of data in a unit block that has been rearranged so as to be continuous and data every other frame of the next unit block are continuously read. Is moved once, it is possible to read out data every other frame for two unit blocks.

When the video data and the audio data are recorded separately, the position of the read section is changed to read only the video data at a predetermined frame interval at the time of high-speed reproduction, or to read the video data at a predetermined frame interval. Data and audio data can be read. It is also possible to read out video data and all audio data at a predetermined frame interval.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a configuration of a disk device capable of recording or reproducing a video material using a disk-shaped recording medium, for example, an optical disk. A pickup unit for reading a signal recorded on the optical disk is provided on one side of the disk. It has one.

In FIG. 1, a disk device 10 has a spindle motor 12 for rotating and driving a removable optical disk 11 on which video material is recorded. The spindle motor 12 is supplied with a spindle motor drive signal MD from a servo block 15 described later, and the spindle motor 12 is driven by the spindle motor drive signal MD to rotate the optical disk 11 at a predetermined speed.

The disk device 10 is an optical disk 1
1 has a pickup unit 13 for reading out a signal recorded in the unit 1. The pickup section 13 serving as the reading means focuses and irradiates a laser beam on the optical disk 11 and generates a current signal Id by photoelectric conversion based on the reflected light from the optical disk 11. In the pickup unit 13, the servo signal T from the servo block 15 is output.
The control of the irradiation position of the laser beam is also performed by the FC.

The current signal Id generated by the pickup unit 13 is supplied to an RF amplifier unit 14. RF amplifier section 1
4, in the focus error signal FE based on the current signal Id,
And a tracking error signal TE and a reproduction signal RS. The focus error signal FE and the tracking error signal TE are supplied to the servo block 15, and the reproduction signal RS is supplied to the signal processing block 32.

In the servo block 15, a focus servo operation and a tracking servo operation are performed by a control signal SC from a control unit 40 described later. That is, RF
The servo signal TFC is generated from the amplifier unit 14 based on the focus error signal FE and the tracking error signal TE and supplied to an actuator (not shown) of the pickup unit 13 so that the laser beam is focused on a desired position on the optical disc 11. The position of an objective lens (not shown) is controlled so as to emit light. The servo block 15 also performs a spindle servo operation for generating a spindle motor drive signal MD for driving the spindle motor 12 and controlling the optical disc 11 to a predetermined rotation speed. Further, a thread operation is performed in which the pickup unit 13 is moved in the radial direction of the optical disc 11 to change the irradiation position of the laser beam. The setting of the signal reading position of the optical disk 11 is performed by the control unit 40, which is control means described later, and the position of the pickup unit 13 is controlled so that the signal can be read from the set reading position.

In the signal processing block 32, the reproduction signal RS is demodulated based on the control signal SCD from the control section 40, and the reproduction data RD is generated. The reproduced data RD is stored in the memory 3 by the memory controller 33.
4 is stored. The operation of the memory controller 30 is controlled by a control signal SCM from the control unit 40.

The reproduction data R stored in the memory 34
D is read by the memory controller 33 and supplied to the data conversion unit 35.

In the data converter 35, the reproduced data RD is converted into an output signal of a predetermined format and supplied to a signal input / output device 50 for editing and recording. For example, when the reproduction data RD is compressed, the reproduction data RD
Is decompressed to produce an uncompressed video / audio signal VAout, which is supplied to the signal input / output device 50. When the signal input / output device 50 can perform editing processing using not only analog and digital video / audio signals but also DV format compressed data, the data converter 35 converts the reproduction data RD into DV format data. Processing for converting to compressed data is also performed.

From the signal input / output device 50, a signal of a captured image captured by a video camera and a signal obtained by reproducing a recording medium are supplied to the data conversion unit 35 as a video / audio input signal VAin. In the data converter 35, the format of the video / audio input signal VAin supplied from the signal input / output device 50 is inversely converted to record data WD.
The recording data WD is written to the memory 34 by the memory controller 33 constituting the data processing means, and the recording data WD written to the memory 34 is read and supplied to the signal processing block 32. In addition,
The data processing means includes the memory controller 33 and the memory 34
And a control unit 40.

In the signal processing block 32, the recording data W
D is subjected to a modulation process to become a recording signal WS. The recording signal WS is supplied to a pickup unit 13 serving as recording means, and the output of the laser beam output from the pickup unit 13 is controlled based on the recording signal WS, so that the optical disc 1
1 is recorded.

The control unit 40 controls the control signals SC, SCD,
SCM generation and the like are performed. Generated control signal SC
Is supplied to the servo block 15 described above. The control signal SCD is supplied to the signal processing block 32, and the control signal SCM is supplied to the memory controller 33, so that the operations of the servo block 15, the signal processing block 32, and the memory controller 33 are controlled.

Next, the operation will be described. The data of the video material is obtained by converting data for several frames into one unit block, rearranging the frames in the unit block, converting the data into a new format, and then recording the data on the optical disk 11.

FIG. 2 shows a format conversion process of video material data. In step ST1 of FIG. 2, the minimum value M of the exponent of the power of "2" which is equal to or larger than the number of frames of the unit block is obtained. For example, when the number of frames is “16”, the value of the fourth power of “2” is “1” when the index is “4”.
6 "and the number of frames becomes" 16 "or more.
The minimum value M of the exponent is “4”. Next, step ST
In 2, a binary number having a value from “0” to “(2 to the power of M) −1” is obtained. For example, when the minimum value M of the exponent is “4”, “0” to “16−1 = 15” Is obtained.

In step ST3, the arrangement of the bits of the binary number BA obtained in step ST2 is inverted to generate a new binary number BB. That is, MSB (Most Sign
bit is LSB (Least Siginificant Bit)
And the LSB bit is changed to the MSB bit to generate a new binary number BB. This new binary number BB is converted to a decimal number DM in step ST4, and the decimal number DM indicates the frame order in step ST5, and the first unit block B0 is set.

As is apparent from the steps ST3 and ST4, the decimal number DM obtained in the step ST4 is separated into an even number and an odd number (binary number BB) because the bit arrangement is inverted. Is even when the LSB of “1” is “0”, and odd when “1”. Further, in the even-numbered part and the odd-numbered part, two groups are generated at four intervals. For example, in the even part (the LSB of the binary number BB is “0”), the group of “0, 8, 4, 12” (the L number of the binary number BB)
A group in which one bit larger than SB is “0”),
Group of "2,10,6,14" (LS of binary BB
A bit that is one greater than B is a “1” group).

Further, two groups are generated at eight intervals in a group of four intervals. For example, "0, 8, 4, 1
2 ”group,“ 0,8 ”group (binary B
A group whose bit smaller than the MSB of B is “0” and a group of “4,12” (MSB of binary BB)
A bit smaller by one than that is a group of “1”).

Therefore, one unit block is, for example, 1
Assuming that there are six frames, if one of the even-numbered frame portion and the odd-numbered frame portion is read from one unit block, the reproduction is performed at double speed, and if one group at four intervals is read out. 4
It is assumed to be double speed reproduction. If one group at eight intervals is read out, the reproduction is performed at 8 × speed.

After the frame order of the first unit block B0 is set in this way, the frame order in the next unit block is set in step ST6. In this step ST6, similarly to the unit block B0 obtained in step ST5, the frame order is divided into an even-numbered part, an odd-numbered part, a group of four intervals, and a group of eight intervals, and furthermore, the unit block B0 obtained in step ST5. Are set so that the frame of the next unit block B1 and the frame of the next unit block B1 have a continuous relationship. For example, as shown in step ST6, assuming that 16 frames are arranged, this frame order is multiplied by (−1), and the value of “unit block length × 2-1” (for 16 frames, “ 31 ") is added to the unit block B
One frame order is set.

For this reason, the unit block B0 and the unit block B1 are connected at, for example, an odd-numbered frame portion, and the terminal group of the unit block B1 and the terminal four-interval group of the unit block B1 are arranged so that the frames are continuous at four intervals. The first four groups are connected, and the frame is 8
The group of eight intervals at the end of the unit block B0 and the group of eight intervals at the beginning of the unit block B1 are connected so as to be continuous at intervals.

In step ST7, the value of "unit block length x 2"("32" for 16 frames) is added to each frame order of the unit block B0, and the unit block B0 is added.
2 is set. Also, the unit block B
The value of “unit block length × 2” is added to each frame order of 1 to set the frame order of the unit block B3. At this time, the connection between the unit block B2 and the unit block B3 is equal to the connection relationship between the unit block B0 and the unit block B1. Thereafter, similarly, the frame order of the unit blocks is sequentially set, and data is recorded on the optical disk 11 in the set frame order.

FIG. 3 is a flowchart showing the data recording process. In step ST11 of FIG. 3, a target unit block indicating a physical address of the optical disk 11 is set. The data recording position is determined by setting the target unit block.

Next, in step ST12, the memory 34
It is determined whether or not data of one unit block has been written in. If the data for one unit block has not been written, the process returns to step ST12, and if the data for one unit block has been written, the process returns to step ST13.
Proceed to.

In step ST13, data is recorded at the position of the target unit block set in step ST11 in the frame order set as described above, and the flow advances to step ST14.

In step ST14, it is determined whether or not there is data to be written next. If there is data, the process returns to step ST11, and if there is no data, recording ends.

Next, the operation for reproducing the optical disk 11 on which data is recorded in this manner will be described with reference to FIGS.

FIG. 4 is a flowchart showing a data reproduction process at a standard speed. In step ST21, in order to reproduce a desired video material, a target representing the physical address of the optical disk 11 on which the data of this video material is recorded. A unit block is set. The data reproduction position is determined by setting the target unit block.

Next, in step ST22, the memory 34
It is determined whether there is an area in which data for one unit block can be written. If the amount of data read from the memory 34 and supplied to the data conversion block 35 is small and there is no area in which data for one unit block can be written, the process returns to step ST22, and the data in the memory 34 is When an area is secured by being read and supplied to the data conversion block 35, the process proceeds to step ST23.

In step ST23, data is read from the position of the target unit block set in step ST21 in the frame order set as described above, written into the memory 34, and proceeds to step ST24.

In step ST24, it is determined whether or not there is data to be read next. If reading of data of a desired video material is not completed, step ST2 is performed.
Returning to step 1, if the data reading has been completed, the reproducing operation is terminated.

As described above, in the case of the reproduction at the standard speed, the data is reproduced for each unit block, and the data of the video material recorded in the frame order as shown in FIG. As shown in FIG.
The data is sequentially read from 1 for each unit block and written into the memory 34. Data is read from the memory 34 in the order of frames and output as a video / audio output signal VAout.

FIG. 6 is a flowchart showing a data reproduction process in high-speed reproduction. In step ST31, what speed is the high-speed reproduction speed, and A / V in which video data and audio data are separately recorded. Information such as the audio mode in the case of the separation method is obtained, and the process proceeds to step ST32. The A / V separation method and the audio mode will be described later.

At step ST32, at step ST31
Based on the information obtained in step (3), a read section in which data is continuously read from the optical disk 11 is set, and the process proceeds to step ST33.

In step ST33, it is determined whether or not there is an area in the memory 34 in which data continuously read from one read section can be written. Here, as in step ST22, if the amount of data read from the memory 34 and supplied to the data conversion block 35 is small and there is no area in which data for one read section can be written, the process returns to step ST33. When the area is secured, the process proceeds to step ST34.

In step ST34, the data in the set read section is read and written in the memory 34, and the process proceeds to step ST35.

In step ST35, it is determined whether or not there is data to be read next. If reading of data of a desired video material is not completed, step ST31 is performed.
When the data reading has been completed, the high-speed reproduction operation ends.

As described above, in the case of high-speed reproduction, a read section in which data is continuously read is set, and data is reproduced in each read section.

In the double-speed reproduction, one frame is composed of eight frames from the end of one of the odd-numbered or even-numbered unit blocks and eight frames from the beginning of the other unit block following this unit block. You. For example, as shown by the solid line in FIG.
8 frames from the end of 0 and odd-numbered unit block B1
8 frames from the beginning of the frame are set as a read section, and 16 frames of frame “1”, frame “9”.
Data for a frame is continuously read. In this case, the memory 34 stores the frames “1” to “3”.
"1" is written every other frame of video material data. When data is read from this read section, the next 8 frames from the end of the unit block B2 and the 8 frames from the top of the unit block B3 are set as the read section. Therefore, the data read position is moved to the head position of the next read section, and the frame “33” and the frame “4” are read.
1 "... 16 frames of data of frame" 49 "are read. In this case, every other frame of video material data is written into the memory 34 from frame “33” to frame “63”.

In the same manner as described above, in order to read the data in the next read section, the seek time for moving the pickup section to the position of the next read section and the data read position of the pickup section after the disk is rotated are set. (The maximum rotation waiting time is equivalent to one rotation of the disk) until the head position of the reading section is reached. In addition, the time obtained by adding the seek time and the rotation waiting time is defined as the positioning time.

The frequency at which the positioning time occurs is 1
Once every six frames, it can be smaller than in the past, and the data of the video material every other frame is written in the memory 34.
By reading the data written in No. 4 in frame order, it is possible to perform natural double speed reproduction with smooth operation without interruption.

In quadruple-speed playback, one frame is read from the end of one of the odd-numbered or even-numbered unit blocks and four frames from the beginning of the other unit block following this unit block. For example, as shown in FIG. 5D, four frames from the end of the unit block B0 and four frames from the top of the unit block B1 are set as a read section,
Frame "3", Frame "11" ... Frame "1"
Data of eight frames of "9" is read. In this case, the memory 34 stores the frames “3” to “3”.
The data of the video material at a 4-frame interval is written up to "1". When data is read from this read section, four frames from the end of the unit block B2 and four frames from the head of the unit block B3 are set as the next read section. For this reason, the data read position is moved to the head position of the next read section, and the frame “35” and the frame “4” are read.
3 "... 8 frames of data of frame" 51 "are read. In this case, the frame "3" is stored in the memory 34.
Data of the video material is written at intervals of four frames from “5” to frame “63”.

In the same manner as described above, the frequency at which the positioning time is generated is once every eight frames, so that the frequency at which the positioning time is generated can be made smaller than in the prior art. Since the data of the video material at the 4-frame interval is written, the memory 34
By reading the data written in
It is possible to perform natural 4 × -speed reproduction with smooth operation without interruption.

FIGS. 5E and 5F show the 8x speed and 16x speed, respectively.
In the case of 8 × speed, two frames from the end of one of the odd-numbered or even-numbered unit blocks and two frames from the beginning of the other unit block following this unit block are defined as one read section. In this case, the frequency of occurrence of the positioning time is once every four frames, and the data of the video material is written into the memory 34 at intervals of eight frames. At 16 × speed, the end frame of one of the odd-numbered or even-numbered unit blocks and the head frame of the other unit block following this unit block are defined as one read section. In this case, the frequency of occurrence of the positioning time is once every two frames, and the data of the video material is written in the memory 34 at intervals of 16 frames.

As described above, the reading section is set according to the reproduction speed, so that the frequency of occurrence of the positioning time is reduced, and the data at the frame interval corresponding to the reproduction speed can be read continuously. Therefore, a good high-speed reproduced image can be obtained.

By the way, in the above case, the case where the number of frames of the unit block is "16" and equal to 2 @ 4 is shown. For example, when the number of unit blocks is smaller than "16", for example, 12 frames. In this case, a format conversion process is performed as shown in FIG. 7 to set a frame order.

In FIG. 7, steps ST1 to ST4 are the same as in FIG. 2, and a description thereof will be omitted. Step S
In T4a, “12, 14, 13, 15” which is a number equal to or more than “the number of frames of the unit block−1” or more from the decimal number DM.
Is invalidated and "0, 8, 4, 2, 10, 6, 1, 1,
12, 5, 3, 11, 12 "are used to indicate the order of frames. Using this decimal number DN, the first unit block B0 is set in step ST5a.

When the frame order of the first unit block B0 is set in this way, the frame order in the next unit block is set in step ST6a. In this step ST6a, similarly to step ST6 of FIG. 2, the frame order of the unit block B0 is multiplied by (−1), and the value of “unit block length × 2-1” (“23” for 12 frames) is used. ) Is added to the unit block B1.
Are set.

In step ST7a, step S in FIG.
Similarly to T7, the value of “unit block length × 2” (“24” for 12 frames) is added to each frame order of unit block B0, and the frame order of unit block B2 is set. Also, the value of “unit block length × 2” is added to each frame order of the unit block B1, and the frame order of the unit block B3 is set. Thereafter, the frame order of the unit blocks is sequentially set in the same manner, and the recording data WD is recorded on the optical disc 11 in this frame order.

Next, the reproducing operation will be described with reference to FIG.
FIG. 8A shows the frame order of the video material data recorded on the optical disc 11.

In double speed reproduction, one frame is read from the end of one of the odd-numbered or even-numbered unit blocks and six frames from the beginning of the other unit block following this unit block. For example, as shown by the solid line in FIG. 8B, six frames from the end of the unit block B0 and six frames from the top of the unit block B1 are read sections, and the frames “1”, “9”,. Are read out for 12 frames.
In this case, the data of the video material every other frame is written into the memory 34 from the frame “1” to the frame “23”. Next, six frames from the end of the unit block B2 and six frames from the top of the unit block B3 are set as the next read section, the data read position is moved to the start position of the next read section, and data is read. Will be

In the same manner, the frequency at which the positioning time is generated is once every 12 frames, and the frequency at which the positioning time is generated is smaller than in the conventional case, and can be, for example, (１ ／). At the same time, since the data of the video material every other frame is written in the memory 34, the data written in the memory 34 is read out in the frame order, and the operation is performed smoothly without interruption and natural double speed reproduction is performed. be able to.

In quadruple speed reproduction, as shown in FIG. 8C, three frames from the end of one of the odd-numbered or even-numbered unit blocks and three frames from the beginning of the other unit block following this unit block are one. Data is sequentially read as a read section. For this reason, the frequency of generating the positioning time is once every six frames,
Since the frequency of occurrence of the positioning time can be made smaller than before, and since the data of the video material is written in the memory 34 at four-frame intervals, the data written in the memory 34 must be read out in frame order. Thus, good 4 × speed reproduction can be performed.

At 8 × speed, as shown in FIG. 8D, the end frame of one of the odd-numbered or even-numbered unit blocks and the two frames from the head of the other unit block following this unit block constitute one reading section. And the data is sequentially read. Therefore, the frequency of occurrence of the positioning time is once every three frames, so that the frequency of occurrence of the positioning time can be made smaller than in the conventional case. Since the data is written, by reading the data written in the memory 34 in the order of frames, it is possible to perform good 8 × speed reproduction.

By the way, the video data and the audio data of the video material are recorded separately so that the video and the audio can be reproduced independently and the after-recording of the video and the audio can be easily performed. is there. In the A / V separation type format in which the video data and the audio data are separated, the video data of the video material is, for example, a unit of a plurality of frames, and the audio data corresponding to the frame is a unit. Thus, one unit of video data and one sound data constitutes one unit block.

As described above, when the video and the audio are separated, the audio block, which is the audio area, and the video block, which is the video area, are interchanged and recorded on the optical disk 11 for each unit block. For example, when the audio block is set as the head of the unit block and the video block is set as the end, in the next unit block, the video block is set as the head of the unit block and the audio block is set as the end.

Next, the frame order of the video area of each unit block is set in the frame order set by the method shown in FIGS. The audio region has a frame order opposite to the frame order of the video region of the same unit block. For example, one unit block is 16 frames, and as shown in FIG. 9A, in the unit block B0, the audio block BA0 is set to the head side, the video block BV0 is set to the end side, and in the next unit block B1, the video block BV is set.
When it is assumed that 1 is the leading side and the audio block BA1 is the last, the frame order of the video block BV0 of the unit block B0 is “0, 8,. , The frame order of the audio block BA0 is “15, 7,..., 8, 0”. The frame order of the video block BV1 of the unit block B1 is “3
.., 24, 16 ”, and the frame order of the audio block BA1 is“ 16, 24,.
• 23, 31 ”. Similarly, the frame order of the video block and the audio block of each unit block is set, and the video and audio data of the video material are separately recorded on the optical disc 11.

Next, a reproduction operation in the A / V separation type format in which video and audio data are recorded separately will be described. When the optical disk 11 on which data is recorded in the frame order shown in FIG. 9A is reproduced at a standard speed, data of each frame is continuously read from the optical disk 11 and written into the memory 34, Data is read out in order, and a video / audio output signal VAout is generated and output.

In double-speed playback, as shown in FIG. 9B, data is read out from each unit block as eight reading frames each of a connection portion between a video block and an audio block. For example, 8 frames from the end of the audio block BA0 of the unit block B0 and 8 frames from the beginning of the video block BV0
The frame is set as a read section, and the audio data of the frame “14”, the audio data of the frame “6”,..., The video data of the frame “14” are continuously read. In this case, the memory 34 stores the frames “0” to “1”.
Video data and audio data are written every other frame up to "4". When data is read from this reading section, the next reading section includes the eight frames from the end of the video block BV1 and the eight frames from the beginning of the audio block BA1 in the unit block B1. For this reason, the data reading position is moved to the head position of the next reading section, and the video data of frame “30”, the video data of frame “22”, and the audio data of frame “30” are read. In this case, video data and audio data are written in the memory 34 every other frame from the frame “16” to the frame “30”.

In the same manner, the frequency at which the positioning time is generated is once every eight frames, so that the frequency at which the positioning time is generated can be reduced. Therefore, by reading out the data written in the memory 34 in the frame order, the operation can be smoothly performed without interruption, and natural double-speed reproduction can be performed.

In quadruple-speed playback, as shown in FIG. 9C, four frames each of a connection portion between a video block and an audio block from a unit block are set as a read section and data is read, thereby causing a positioning time. The frequency is once every four frames, and data is written in the memory 34 at intervals of four frames.

In addition, in the case of 8 × speed reproduction, as shown in FIG. 9D, the frequency at which a positioning time occurs due to the fact that two frames each of a connection portion between a video block and an audio block are set as a read section and data is read from a unit block. Is 2
At each frame, data is written in the memory 34 at intervals of 8 frames.

Further, in 16 × speed reproduction, as shown in FIG. 9E, one frame at the connection between a video block and an audio block from a unit block is set as a read section and data is read, thereby causing a positioning time. The frequency is once per frame, and the video data is written into the memory 34 at intervals of 16 frames.
Therefore, by reading the data from the memory 34 in the frame order, it is possible to perform favorable double speed reproduction, quadruple speed reproduction, octuple speed reproduction or 16 times speed reproduction.

Further, when the video and audio data are recorded separately, not only is the sound output based on the data with the fixed pitch but also decimated in accordance with the high-speed reproduction speed output. It is possible to switch to a mode in which the output of sound is eliminated or a mode in which the pitch is changed and output. For this reason, A / V in step ST31 of FIG.
If any of the audio modes is selected in the case of the separation method, the reading section is set based on the audio mode selected in step ST32.

FIG. 10 shows a reproduction operation when the mode for eliminating audio output is selected. FIG. 10A shows the frame order of data recorded on the optical disk 11.

Here, when the output of the audio is eliminated, the reading of the audio data is not required. Therefore, in the double speed reproduction, the video block of each unit block is connected to the audio block as shown in FIG. 10B. Eight frames on the opposite side of the part are set as a read section and data is read. For example, in the unit block B0, eight frames from the end of the video block BV0 and the video block BV1 of the unit block B1
, The eight frames from the beginning of the frame are set as a read section, and the video data of frame “1”, frame “9”... Frame “17” are continuously read. At this time, the memory 34
Is written in every other frame from frame “1” to frame “31”. When data is read from this read section, eight frames from the end of the video block BV2 of the unit block B2 and eight frames from the top of the video block BV3 of the unit block B3 are set as a read section. Therefore, the data read position is moved to the head position of the next read section, and the video data of frame “33”, frame “41”... Frame “49” is read. In this case, the frame "3" is stored in the memory 34.
The data of the video material of every other frame is written from “3” to frame “63”.

The same processing is performed thereafter, and the frequency of occurrence of the positioning time is once every 16 frames, which can be smaller than that when audio data is read out. Since the data of the video material is written, by reading out the data written in the memory 34 in the frame order, it is possible to obtain a natural 2 × -speed playback image with smooth operation without interruption.

As shown in FIGS. 10C to 10E,
In the case of 4 × speed reproduction, 8 × speed or 16 × speed, similarly, data at a predetermined frame interval corresponding to the reproduction speed can be continuously read out by reducing the frequency of occurrence of the positioning time. Smooth and natural 4x speed,
It is possible to obtain reproduced images at 8 × speed and 16 × speed.

FIG. 11 shows a reproducing operation in a case where a mode for changing the pitch and outputting is selected. In this case, it is assumed that data of all frames is read from the optical disk 11 irrespective of the reproduction speed, and the audio data processing circuit (not shown) uses the audio data read from the memory 34 to set the time axis of the audio. An audio signal whose pitch is changed according to the reproduction speed by compressing according to the reproduction speed is output. For example, in the case of double-speed reproduction, the time axis of the sound is compressed to half, and the pitch is increased and output.

FIG. 11A shows the frame order of data recorded on the optical disk 11. Here, if the pitch is changed and output, all the audio data is read out. Therefore, in the double speed reproduction, as shown in FIG. 11B, the audio block and the video block connected to the audio block are connected. Data reading is performed with eight frames as a reading section. For example, the audio block BA0 of the unit block B0 and the eight frames from the beginning of the video block BV0 are set as the read section, and the audio data of the frame “15”, the audio data of the frame “7”,.
4 "is continuously read out. in this case,
The memory 34 stores audio data from frame “0” to frame “15” and frame “0” to frame “14”.
Up to every other frame of video data is written. When data is read from this read section, eight frames from the end of the video block BV1 of the unit block B1, the audio block BA1 of the unit block B1, the audio block BA2 of the unit block B2, and the unit block B2
8 frames from the beginning of the video block BV2 are set as a read section. For this reason, the data read position is moved to the head position of the next read section, and the video data of frame “30”, the video data of frame “22”... It is. In this case, the memory 34 stores the frames “16” to “4”.
7 and video data every other frame from frame "16" to frame "46" are written.

The same processing is performed thereafter, and the frequency of occurrence of the positioning time is once for every two unit blocks, so that it is possible to obtain a double-speed playback image in which the operation is smooth and natural without interruption. A sound with a variable pitch can be obtained based on the read sound data without thinning.

As shown in FIG. 11C, in quadruple-speed playback, the video data read out after the end of the audio data reading is four frames, and the video data read out before the start of the audio data reading is four frames. A good 4 × speed reproduced image can be obtained.

As described above, by selecting the audio mode, it is possible to obtain audio based on data thinned out according to the high-speed reproduction speed, and audio whose pitch is varied according to the high-speed reproduction speed. Alternatively, the output of sound can be stopped.

In the above-described embodiment, the data of the video material is read from one disk by using one pickup. However, a plurality of pickup units are provided for one disk to be recorded on the optical disk. It is assumed that the data of the video material is read out, or a plurality of optical discs on which the video material is recorded are provided, and one or more pickup units are provided for each optical disc to read the data of the video material recorded. It may be.

FIG. 12 shows, for example, that data of a video material is recorded on two optical disks, and two pickup units are provided on one side of one disk. 2 shows a configuration of a disk device 60 that can obtain a video / audio signal. In FIG. 12, the same reference numerals are given to portions corresponding to FIG. 1, and detailed description thereof will be omitted.

In FIG. 12, the optical disk 11 is provided with pickup sections 13a and 13b.
The current signal obtained by the pickup unit 13a is supplied to the RF amplifier unit 14a, and the current signal obtained by the pickup unit 13b is supplied to the RF amplifier unit 14b.

The reproduction signal R obtained by the RF amplifier section 14a
S1 is supplied to the terminal a of the switch 31a,
The reproduction signal RS2 obtained by the RF amplifier unit 14b is supplied to the terminal a of the switch 31b.

The optical disc 21 is provided with pickup sections 23a and 23b.
The current signal obtained in 3a is supplied to the RF amplifier unit 24a, and the current signal obtained in the pickup unit 23b is supplied to the RF amplifier unit 24b.

The reproduction signal R obtained by the RF amplifier section 24a
S3 is supplied to the terminal b of the switch 31a,
The reproduction signal RS4 obtained by the RF amplifier 24b is supplied to the terminal b of the switch 31b.

The switch 31a selects one of the reproduced signals RS1 and RS3,
Signal processing block 32a connected to movable terminal c of 1a
Supplied to Also, the switch 31b controls the reproduction signal R
The signal of either S2 or RS4 is selected and supplied to the signal processing block 32b connected to the movable terminal c of the switch 31b.

The signal processing blocks 32a and 32b perform the same processing as the signal processing block 32 shown in FIG. 1 and perform reproduction data RDa and RDb based on the reproduction signals RS1 to RS4.
Is generated and written to the memory 34.

The reproduced data R read from the memory 34
Da and RDb are supplied to the data conversion block 35a and the data conversion block 35b.
a, 35b output video and audio output signals VAout-a, VAout-b
Is output and supplied to the signal input / output device 50.

When the video / audio input signals VAin-a and VAin-b are supplied from the signal input / output device 50 to the disk device 60, the data conversion blocks 35a and 35b
As a result, recording data WDa and WDb are generated from the video / audio input signals VAin-a and VAin-b, and written into the memory 34. The recording data WD written in the memory 34
The signals a and WDb are subjected to modulation processing and the like in the signal processing blocks 32a and 32b to become recording signals WSa and WSb, which are supplied to the switches 36a and 36b. The pickups 13a and 23a are connected to the switch 36a, and the recording signal WSa is supplied to one of the pickups. The switch 36b has the pickup units 13b and 23b.
Are connected, and the recording signal WSb is supplied to one of the pickup units.

The control unit 40 controls the servo block 1
5, 25 are controlled, and switches 31a,
Control of the switching operation of 31b, 36a, 36b is also performed.
In the servo block 15, the pickup units 13a and 13b
, And the servo block 25 controls the operation of the pickup units 23a and 23b. The memory controller 33 controls writing and reading of data of two channels.

In the disk device configured as described above,
The two-channel video / audio input signals VAin-a and VAin-b from the signal input / output device 50 can be recorded on the optical discs 11 and 21, and the two-channel video / audio signals VAout-a and VAout are reproduced by reproducing the optical discs 11 and 21. -b can be obtained. Also, since the disk device 60 has two pickup units for one optical disk,
Data recording and reproduction can be performed in parallel. Furthermore, even when data is not recorded or reproduced in parallel, for example, a pickup that is on standby after a target unit block is set in FIGS. 3 and 4 or a read section is set in FIG. By discriminating the units and controlling the switches 31a and 31b and the switches 36a and 36b, data can be efficiently recorded and reproduced using the pickup unit in the standby state.

In addition to the case where an optical disk is used, another disk such as a magnetic disk may be used. FIG. 13 shows a configuration of a disk device when a disk storage device is used. Although two disk storage devices using magnetic disks are used in FIG. 13, one disk storage device or three or more disk storage devices may be used. In this case, when reproducing the video material, data is read from the disk storage devices 75 and 76 controlled by the interface controller 70 and written to the memory 34 controlled by the memory controller 33, and the data is read from the memory 34. Are read out and output as video / audio output signals VAout-a and VAout-b by the data conversion blocks 35a and 35b.

When recording the video / audio input signals VAin-a and VAin-b, the video / audio input signals VAin-a and VAin-b are converted into recording data by the data conversion blocks 35a and 35b, and are stored in the memory 34. The data written and written in the memory 34 is read out and stored in the disk storage devices 75 and 76 via the interface controller 70. The data recording / reproducing operation is performed by the control block 8.
Controlled by 0.

As described above, according to the above-described embodiment,
Since a reading section is set in accordance with a reproduction speed and a sound mode in a section extending over two consecutive unit blocks and data is continuously read, the frequency of occurrence of a positioning time can be reduced. Smooth high-speed reproduction can be performed.

[0103]

According to the present invention, at the time of recording, the frames are rearranged so that the data of the video material required according to the reproduction speed is continuous in a section extending over two continuous unit blocks. And is recorded on a disk-shaped recording medium. At the time of reproduction, a read section corresponding to the reproduction speed is set over two consecutive unit blocks, and data is continuously read from the disk-shaped recording medium.

Therefore, it is not necessary to move the data reading position of the reading means for each unit block, and an easy and good high-speed reproduced image can be obtained. In addition, since it is not necessary to move the data reading position for each unit block and the frequency of positioning time is reduced, it is necessary to use a device capable of reproducing only one disk at a time or a small number of disk storage devices. Even a low-cost device such as a conventional device can perform smooth high-speed reproduction.

Further, the video data and the audio data of the video material are separated in the unit block, and the positions of the video data and the audio data are switched between the odd-numbered unit block and the even-numbered unit block. Since data frames are rearranged, two consecutive
Video data corresponding to the reproduction speed is continuously read over one unit block. Also, within the unit block, the audio data frames are rearranged so that the video data and audio data of the video material required according to the playback speed are continuous in the section over the separated video data and audio data. Then, a reading section corresponding to the reproduction speed is set over the section of the video data and the audio data, and the video data and the audio data are read.

Therefore, even if the video data and the audio data are recorded separately, if the audio mode that does not output the audio is selected, the video corresponding to the reproduction speed is extended over two consecutive unit blocks. By reading data continuously, a high-speed reproduced image with smooth motion can be obtained. Further, when the audio mode is a mode in which the pitch is variable, a read section corresponding to the reproduction speed is set over two consecutive unit blocks, and the video data and the audio data are read. Not only can it be obtained, it can also perform a variety of audio output.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a format conversion process.

FIG. 3 is a flowchart illustrating a data recording process.

FIG. 4 is a flowchart showing a data reproduction process at a standard speed.

FIG. 5 is a diagram showing a reproducing operation.

FIG. 6 is a flowchart showing a data reproduction process in high-speed reproduction.

FIG. 7 is a diagram for explaining another format conversion process.

FIG. 8 is a diagram showing another reproduction operation.

FIG. 9 is a diagram showing a reproducing operation in the A / V separation format.

FIG. 10 is a diagram illustrating a reproduction operation when audio output is eliminated.

FIG. 11 is a diagram showing a reproducing operation in a case where a pitch is changed and output.

FIG. 12 is a diagram showing a configuration of another embodiment.

FIG. 13 is a diagram showing a configuration when a disk storage device is used.

FIG. 14 is a diagram showing a conventional 2 × speed reproduction operation.

FIG. 15 is a diagram showing another double speed reproduction operation.

[Explanation of symbols]

10, 60 ... disk device, 11, 21 ... optical disk, 13, 13a, 13b, 23a, 23b ...
Pickup unit, 32, 32a, 32b ... signal processing block, 33 ... memory controller, 34 ...
Memory, 35, 35a, 35b Data conversion block, 40, 80 Control unit, 50 Signal input / output device, 70 Interface controller, 75, 7
6 ... Disk storage device, 80 ... Control block

Claims (14)

[Claims] 1. Data of a video material is made into a unit block for every predetermined number of frames. In the unit block, data of the video material required according to a reproduction speed is divided into two continuous unit blocks. A disc-shaped recording medium, characterized in that frames are rearranged so as to be continuous in a straddling section and the data of the video material is recorded. 2. The video material data comprises video data and audio data. The video data and audio data are separated in the unit block, and the odd-numbered unit block and the even-numbered unit block form the video data. 2. The disk-shaped recording medium according to claim 1, wherein the positions of the video data and the audio data are switched, and the frames of the video data are rearranged in the unit block. 3. In the unit block, the audio data so that video data and audio data of the video material required in accordance with the reproduction speed are continuous in a section between the separated video data and audio data. 2. The disk-shaped recording medium according to claim 1, wherein the data frames are rearranged. 4. The video material data to be recorded is made into a unit block for every predetermined number of frames, and the video material data required according to the reproduction speed is continuous in a section spanning two consecutive unit blocks. Data processing means for rearranging frames in the unit block, and recording means for recording the video material data rearranged by the data processing means on a disk-shaped recording medium. Disk recording device. 5. The data processing means has a memory, and sequentially writes the data of the video material to be recorded in the memory, and controls a reading order of the data written in the memory to control a reading order of the frame of the video material. 5. The disk recording apparatus according to claim 4, wherein rearrangement is performed. 6. The data processing means converts the video data and audio data of the video material to be recorded into a unit block for each predetermined number of frames, separates the video data and the audio data within the unit block, It is assumed that the positions of the video data and the audio data are exchanged between the unit block of an even number and the unit block of an even number, and the data of the video required according to the reproduction speed is divided into two continuous unit blocks. The frames are rearranged so as to be continuous, and the audio data of the audio data is required so that the video data and the audio data required according to the playback speed are continuous in a section between the separated video data and the audio data. 5. The disk recording apparatus according to claim 4, wherein the frames are rearranged. 7. The disk recording apparatus according to claim 4, wherein a plurality of said recording means are provided for one recording surface of said disk-shaped recording medium. 8. The video material data is made into a unit block for every predetermined number of frames, and within the unit block, the video material data required according to the reproduction speed is divided into two continuous units. In a disk reproducing apparatus for reproducing a disk-shaped recording medium on which frames are rearranged and recorded so as to be continuous in a section spanning a block, reading means for reading data recorded on the disk-shaped recording medium; And control means for controlling the reading means so as to continuously read data in the reading section from the disk-shaped recording medium by setting a reading section extending over two consecutive unit blocks according to the following. Disk playback device. 9. The video data and audio data of the video material are divided into unit blocks for each predetermined number of frames. The video data and audio data are separated in the unit blocks, and the odd-numbered unit blocks and the even-numbered unit blocks are separated. The positions of the video data and the audio data are interchanged between the unit blocks,
In the unit block, the video data required according to the playback speed is continuous in a section extending over two continuous unit blocks, and the video data and audio data required according to the playback speed are not included. A disc reproducing apparatus for reproducing a disc-shaped recording medium on which frames of the video data and the audio data are rearranged so as to be continuous in a section between the separated video data and audio data, and wherein the disc-shaped Reading means for reading data recorded on a recording medium; and a reading section set according to a reproduction speed and an audio mode, and controlling the reading means so as to continuously read data in the reading section from the disc-shaped recording medium. And a control unit for performing the operation. 10. In the control means, when the audio mode is a mode in which no audio is output, the positions of the video data and the audio data are interchanged, so that the video data of two continuous unit blocks are set. 10. The disk reproducing apparatus according to claim 9, wherein a read section is set in accordance with the reproduction speed over the section. 11. The control means according to claim 1, wherein when the audio mode is a mode for outputting a sound without changing the pitch of the audio, the control means responds to the reproduction speed over the section of the video data and the audio data in the unit block. 10. The disk reproducing apparatus according to claim 9, wherein a read section is set. 12. In the control means, when the audio mode is a mode in which the pitch of the audio is varied and output, the positions of the video data and the audio data are interchanged, so that the two 10. The disk reproducing apparatus according to claim 9, wherein a section of audio data of the unit block is set as a read section, and a read section is set in a section of video data continuous with the audio data according to a reproduction speed. 13. A method according to claim 8, further comprising a pitch changing means for generating an audio signal whose pitch is changed in accordance with said reproduction speed by using the audio data of the two unit blocks read by said reading means. Item 13. The disk reproducing device according to Item 12. 14. The disc reproducing apparatus according to claim 8, wherein a plurality of said reading means are provided for one recording surface of said disc-shaped recording medium.