JP2002191019A - Data recorder, data recording method, data recording and reproducing device and data recording and reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DV system VTR compatible with the NTSC system, which can record high definition still picture data whose number of horizontal pixels is 720 or over and whose number of vertical pixels is 480 or over. SOLUTION: The DV system VTR is provided with a recording circuit 102 being a 1st recording means that records high resolution still picture data with resolution higher than the resolution of a DV system moving picture and a DV system digital VTR 105 being a 2nd recording means that records the high resolution still picture data outputted from the 1st recording means. The high resolution still picture data recorded in the 1st recording means 101 are divided into blocks and read with a resolution of a prescribed 1-frame image in the DV system moving picture mode, and the 2nd recording means 105 records the read block together with the position data representing the read start position of the read block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording apparatus, a data recording method, a data recording / reproducing apparatus, a data recording / reproducing method, and the like for recording and reproducing a high-definition still image on a recording / reproducing apparatus such as a camera-integrated VTR.

[0002]

2. Description of the Related Art Conventional digital recording VT integrated with a camera
Video signal processing of R (hereinafter, referred to as DV system VTR) will be described with reference to FIG.

FIG. 3A is a configuration diagram when an image captured by a camera is recorded on a tape. The image captured by the imaging circuit 301 is stored in the DV compression circuit 3 in the DV system VTR 306.
02 is input. The input image data has a video frame frequency of 30 Hz, luminance data of 720 horizontal pixels and 480 vertical pixels, and color difference (RY, BY) data of 180 horizontal pixels and 480 vertical pixels. It is. The DV compression circuit 302 compresses this data to about 1/5. The auxiliary data generation circuit 307 determines the attribute of the data (N
TSC / PAL, information such as copy system availability / impossibility), and this data is hereinafter referred to as VAUX. Note that this description is irrelevant to the processing of audio data,
It does not describe the processing of the audio signal. Actually, a circuit block for processing audio data and a circuit block for generating auxiliary data for audio (AAUX data) exist in the DV system VTR 306.

[0004] The compressed video data and VAUX data are output to an external device through an IEEE 1394 driver circuit 303. The error correction coding circuit 304 performs error correction coding on the compressed data, performs 24-25 conversion by the recording coding circuit 305, and records the data on a tape via a recording head. The data recorded on the tape is recorded by dividing one frame of video and audio data into ten tracks.

FIG. 3B is a configuration diagram for explanation at the time of reproduction. At the time of reproduction, a reproduction signal is input from the reproduction head, the reproduction data subjected to the 24-25 conversion processing is decoded by the recording code decoding circuit 315, and the error correction processing circuit 314 performs a correction process if a reproduction error exists. Will be The image data that has been subjected to the error correction processing is subjected to DV compression decoding processing by a DV compression decoding circuit 312, and the horizontal pixel count is 7 pixels.
The image data is restored to image data of 20 pixels and 480 vertical pixels. Further, the auxiliary data detection circuit 317 extracts data and information necessary for the reproduction signal processing from the VAUX data subjected to the error correction processing. The restored image data is converted into an analog video signal by the video signal output driver circuit 311 and output to a television monitor or the like. The error-corrected image data and VAUX data are transmitted to the IEEE 1394 driver circuit 303.
Is output to an external device via. IEEE1 during playback
The image data output via the 394 driver circuit 303 is in a DV-compressed state.

FIG. 3C shows a configuration in a case where the digital signal is received from an external device via the IEEE 1394 driver circuit 303. The image data and VAUX data received by the IEEE 1394 driver circuit 303 are subjected to an error correction encoding process by an error correction encoding circuit 304, are encoded by a recording encoding circuit 305, and are recorded on a tape. The auxiliary data detection circuit 317 extracts necessary information from the VAUX data received by the IEEE 1394 driver circuit 303 and performs predetermined processing. The image data received by the IEEE 1394 driver circuit 303 is restored by the DV compression decoding circuit 312 into image data having 720 horizontal pixels and 480 vertical pixels. The restored image data is converted to an analog video signal by the video signal output driver circuit 311 and output to an external device.

Next, a still image photographing function of the DV camera-integrated VTR will be described. The DV camera-integrated VTR has a function of recording a still image as well as a moving image. A still image of one frame (or one field) captured by the imaging circuit 301 is stored in a memory in the imaging circuit. The image data stored in the memory in the imaging circuit 301 is repeatedly input to the DV system VTR unit 306. The DV system VTR records the input image data on a tape in the same manner as a normal moving image. Thus D
Still images can also be recorded on tape using a V-system VTR. However, the resolution (number of pixels) of a still image that can be recorded is 720 × 480, which is the same as that of a normal moving image. This is because the DV compression method uses 720 × 4 image data.
This is because it is limited to 80. This is a DV system VTR
Has been developed on the premise that a reproduced image is displayed on a current TV monitor. Since the current TV system has 525 vertical scanning lines, there is no point in recording and reproducing a high-resolution image any more. That's why. Therefore, the image data that can be processed by the DV compression circuit is limited to 720 × 480 image data.

On the other hand, digital still cameras for recording a still image in a semiconductor memory have recently been commercialized. Some digital still cameras have a resolution of 1000 pixels or more in both the horizontal and vertical directions. Unlike digital VTRs, the reason for handling high-resolution images is DV VT
This is because, while R is intended to be displayed on a TV monitor, a digital still camera is intended to be displayed on a personal computer or printed. Most personal computer monitors exceed 1000 pixels both horizontally and vertically, and there is a growing demand for printing still images of photographic quality on A4 size paper. For this reason, a digital still camera is equipped with an image sensor having a high number of pixels, and is capable of capturing a high-resolution still image.

Since most digital still cameras use a semiconductor memory as a recording medium, the number of images that can be shot cannot be made so large. In particular, the higher the resolution of an image, the larger the file size of one still image.
It may exceed MByte. For example, 64 MByte
When 1 MByte image is photographed per semiconductor memory, only 64 images can be photographed.

On the other hand, in the case of the DV system cassette, the amount of recordable data is 15
GByte or more. 1 MByte per sheet
Assuming that still images have been recorded, the calculation can record 15,000 or more still images.

The major reason why such a high-resolution still image cannot be recorded by the DV system VTR is that the image compression and recording system of this system fixes the image resolution to 720 × 480. Although it is possible to record on a tape using an image compression technology other than the DV system (for example, JPEG), it is necessary to mount a data compression circuit different from the compression system of the DV system, so that there is a problem in terms of cost. Become.

In many cases, the DV system VTR assumes a TV monitor as a device for displaying an image. However, recent VTRs are equipped with a common interface with a personal computer such as IEEE1394 or RS-232C. It is also possible to transfer images to a personal computer.

[0013]

As described above, the DV system V
In the TR, the tape used has a capacity several hundred times larger than the semiconductor memory of a digital still camera or the like, and can record a large number of still images. However, there is a problem that a still image with a resolution higher than 720 × 480 cannot be recorded. there were.

That is, a still image larger than 720 horizontal pixels and 480 vertical pixels could not be recorded on a magnetic tape and output to the outside via IEEE 1394. In addition, 720 horizontal pixels from the magnetic tape,
When a still image larger than 480 vertical pixels is reproduced,
It could not be received over EEE1394.

The present invention relates to a recording apparatus, a recording method, and a recording / reproducing apparatus capable of recording / reproducing a high-definition still image having a number of pixels larger than 720 × 480 on a recording medium of the DV method using the DV compression method as it is. Another object of the present invention is to provide an image data output procedure and a data receiving apparatus.

[0016]

In order to solve the above-mentioned problems, a data recording / reproducing apparatus according to the present invention comprises a first recording means for recording high-definition still image data having a higher resolution than the moving image resolution of the DV system. Second recording means for recording the high-definition still image data output from the recording means; and high-definition still image data recorded on the first recording means for a predetermined frame in the DV system moving image mode. The image data is divided into blocks at the resolution of the image and read out.
During playback, high-definition still image data is written in the storage means based on the position information for each block having the resolution in the moving image mode.

According to the present invention, the resolution of an image is 720 ×
It is possible to provide a data recording / reproducing apparatus capable of recording and reproducing a high-resolution still image even if the DV compression method limited to 480 is used.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A data recording / reproducing apparatus according to the present invention
First recording means for recording high-definition still image data having a resolution higher than the moving image resolution of the DV system, and second recording means for recording high-definition still image data output from the recording means.
Recording means; and dividing the high-resolution still image data recorded in the first recording means into blocks at a resolution of a predetermined one-frame image in the DV system moving image mode, and starting reading of the read blocks. It is characterized in that it is recorded in the second recording means together with the position data representing the position, and a high-resolution still image is recorded even when using a DV compression method whose image resolution is limited to 720 × 480. I can do it.

In the above-described data recording apparatus of the present invention,
Further, the division number of the block and the reading order of each block are recorded together with the high-definition still image data in the second recording means, and the resolution of the image is limited to 720 × 480. Even when the DV compression method is used, a high-resolution still image can be recorded.

In the above-described data recording apparatus of the present invention,
Further, the high-definition still image data is recorded in the second recording means a plurality of times in the DV system moving image mode,
Even if some data cannot be reproduced, it can be reproduced reliably by repeatedly recording.

Next, the data recording method of the present invention comprises the steps of: recording high-definition still image data having a resolution higher than that of a moving picture of the DV system in a first recording means; Data is recorded in the second recording means, and the high-definition still image data recorded in the first recording means is divided into blocks at a resolution of a predetermined one-frame image in the DV mode moving image mode, and is read and read. Characterized in that the data is recorded in the second recording means together with the position data indicating the read start position of the read block, and the image resolution is high even when using the DV compression method limited to 720 × 480. Of still images can be recorded.

In the data recording method of the invention described above, the high-definition still image data is recorded on the second recording means a plurality of times in a moving image mode of a DV system. By dropout etc.
Even if some data cannot be reproduced, it can be reproduced reliably by repeatedly recording.

Next, a first recording means for recording image data at a first resolution in which one frame has the number of horizontal pixels H1 and the number of vertical pixels V1, a number of horizontal pixels H2 (H2> H1) and a number of vertical pixels V2 Second recording means for recording high-definition image data of the second resolution (V2> V1), and recording the recorded high-definition image data of the second resolution at the first resolution H1 × V1
Reading control means for reading out one image data block unit and recording position information indicating from which position in the second high-definition image data frame each read out image data is read out together with the image data. This is a feature, and a high-resolution still image can be recorded even if a recording method in which the image resolution is limited to a low resolution is used.

In the data recording apparatus of the invention described above, the recording means for recording the high-definition image data of the second resolution H2 × V2 is a detachable memory, and the reading of the memory is performed at the first resolution H1 × A high-definition still image data recorded in an external memory; and a first resolution is provided in the position information. The external high-definition still image data is read out and recorded in the DV system image data by indicating the horizontal position and the vertical position at which reading of the image data of the high-definition image frame is started in units of H1 × V1 block image data. Further, position information is recorded in an auxiliary data recording area (referred to as a VAUX section) provided on a magnetic tape of a DV system VTR. By, it can be recorded by using the recording image format DV format high definition still image data on a magnetic tape.

Next, the data reproducing apparatus of the present invention combines a reproducing means for reproducing image data in which one frame has the number of horizontal pixels H1 and the number of vertical pixels V1 with one frame by combining the image data reproduced from the reproducing means. Is the horizontal pixel number H2 (H
2> H1) A storage unit for generating and storing high-definition display image data having the number of vertical pixels V2 (V2> V1), and the storage unit for storing the reproduced image data reproduced by the reproducing unit in H1 × V1 block units. At the time of storage, the high-definition display image (H2 ×
V2) It is provided with a writing control means for storing in the storage means based on position information indicating which position in the area, and a display means for displaying high-definition display image data read from the storage means. It is possible to reproduce a still image with higher definition than the resolution of the DV moving image system.

Next, in the data recording / reproducing apparatus of the present invention,
In the data recording device, one frame is composed of the number of horizontal pixels H.
1. A recording means for recording image data at a first resolution which is the number of vertical pixels V1, and high-definition image data having a second resolution of the number of horizontal pixels H2 (H2> H1) and the number of vertical pixels V2 (V2> V1) Recording means for recording the image data; read control means for reading the recorded high-definition image data of the second resolution for each image data block unit of the first resolution H1 × V1; Position information indicating from which position of the second high-definition image data frame is read is recorded together with the image data, and the data reproducing apparatus reproduces image data in which one frame has the number of horizontal pixels H1 and the number of vertical pixels V1. By combining the reproducing means and the image data reproduced from the reproducing means, one frame is a high definition display image data having a horizontal pixel number H2 (H2> H1) and a vertical pixel number V2 (V2> V1). Storage means for generating and storing data,
The reproduced image data reproduced by the reproducing means is H1
When storing in the storage unit in units of × V1 blocks,
Writing control means for storing in the storage means based on position information indicating a position in the high-definition display image (H2 × V2) area reproduced together with the reproduced image data; It is characterized by having display means for displaying high-definition display image data, and can record and reproduce a high-resolution still image even when using a recording method in which the image resolution is limited to a low resolution. .

Next, in the image output device of the present invention, 1
Output means for outputting image data of a first resolution having a frame number of horizontal pixels H1 and vertical pixel number V1, recording means for recording the image data of the first resolution, and a horizontal pixel number H
2 (H2> H1) the second number of vertical pixels V2 (V2> V1)
Recording means for recording image data of the second resolution; and storing the recorded one-frame image data of the second resolution in the first resolution.
Reading control means for reading out each image data block unit having a resolution of H1 × V1; and position information indicating from which position of the read-out image data the frame image of the second resolution was read out together with the image data. The output means outputs the image data, and the image resolution is higher than the resolution of the DV compression method. The data receiving apparatus according to the present invention further comprises: H1, receiving means for receiving image data of the first resolution having the number V1 of vertical pixels, and receiving the image data having the number of horizontal pixels H2 (H2> H1) and the number of vertical pixels V2 (V2> V1) generated from the received image data. Storage means for storing display image data having a resolution of 2; read control means for reading out the stored image data for each block unit of the first resolution H1 × V1; A writing control unit for storing, in the storage unit, position information indicating from which position of the display image the read image data was read together with the image data; and displaying the display image data read from the storage unit. And receiving and displaying image data whose resolution is higher than the resolution of the DV compression method. (Embodiment 1) An embodiment of the invention described in claims 1 to 9 of the present invention will be described below with reference to FIGS.
This will be described with reference to FIGS. 3, 4, and 5.

In FIG. 1, a signal source 101 is a circuit for outputting high-resolution still image data 110. The output image data 110 is data in which the resolution of one frame image recordable by the DV system VTR 105 as the second recording means is larger than 720 horizontal pixels × 480 vertical pixels. The number of horizontal pixels is Hn and the number of vertical pixels is Vn. In this embodiment, 720 <
Hn ≦ 1440, 480 <Vn ≦ 960. Specific examples of the signal source 101 include an output source such as image data from a high-quality CCD camera and image data created by a personal computer or the like.

The image data 110 is stored in the write control circuit 103
Is written to the storage circuit 102 under the control of. The storage circuit 102 is a first recording unit that records high-definition still image data having a resolution higher than the moving image resolution of the DV system, and includes at least one horizontal pixel number Hn and a vertical pixel number Vn.
This is a storage circuit having a storage capacity capable of storing n still image data 110. For simplicity,
The storage circuit 102 stores one piece of still image data (the number of horizontal pixels Hn and the number of vertical pixels Vn) input from the signal source 101. Further, the storage circuit 102 outputs still image data in block units of a part of the still image data stored in the storage circuit 102 under the control of the read control circuit 104. The read position in the storage circuit 102 is specified by the read control circuit 104, and the resolution of one block of the output still image data is 720 horizontal pixels and 480 vertical pixels. When the readout control circuit 104 reads the 720 × 480 image data at a certain position a predetermined number of times m times, the readout position is changed to another position and read out m times again. In this way, the read control circuit 104 changes the read position until all the image data in the storage circuit 102 has been read.

When a magnetic tape is used as a recording medium, recording errors such as burst-like dropouts often occur. To cope with these noises, the same data is recorded a predetermined number of times m and the recorded data is recorded. Increase reliability. If a value of 2 to 5 is adopted as the value of m, burst noise is sufficiently released.

FIG. 2 shows an example of the image data 111 output from the storage circuit 102 under the control of the read control circuit 104. In this embodiment mode, FIG.
Is the whole image data of the number of horizontal pixels Hn and the number of vertical pixels Vn for one frame stored therein. Read control circuit 1
04 designates the coordinates corresponding to the upper left vertex of the data block of 720 × 480 pixels to be read. FIG. 2 (b)
Is a diagram in which the read control circuit 104 first designates a read position, and the read control circuit 104 sets the upper left coordinate of the 720 × 480 image data to be read to (0, 0).
Specify to be. The storage circuit 102 outputs a 720 × 480 image data block GA from the coordinates (0, 0) according to this. When the 720 × 480 image data block GA is output m times, the read position coordinates are changed to (Hn-720, 0) as shown in FIG.
The storage circuit 102 outputs 720 × 480 image data GB so that the coordinates (Hn−720, 0) are at the upper left. When the image data has been output m times, the reading position coordinates are changed to (0, Vn-480) as shown in FIG.

The storage circuit 102 stores the coordinates (0, Vn-48
0) to the upper left so that the image data G of 720 × 480
-C is output. Similarly, when the image data GC is output m times, the read position coordinates are changed to (Hn-720, Vn-480) as shown in FIG. The storage circuit 102 outputs 720 × 480 image data GD such that the coordinates (Vn−720, Vn−480) are at the upper left. The image data GD is output m times. In this manner, all the still image data having the number of horizontal pixels Hn and the number of vertical pixels Vn stored in the storage circuit 102 are read out by the readout control circuit 104 specifying the readout position coordinates four times (including the first time). I can do it. The read image data is 720 × 480 still image data that can be recorded by the DV digital VTR 105.

As described above, the readout position information in the horizontal direction is shifted 720 by 0, Hn-720, Hn-2 × 720. In addition, the readout position information in the vertical direction shifts by 480, 0, Vn-480, Vn-2 × 480. In this way, using the position information, the DV
By recording and reproducing in units of 720 × 480 blocks of the system resolution, a high-definition still image can be recorded and reproduced in the DV format.

The read control circuit 104 outputs various synchronizing signals 113 such as a horizontal synchronizing signal and a vertical synchronizing signal for operating the DV digital VTR 105, and the storage circuit 102 synchronizes with the synchronizing signal 113 to output a 720 × 480 image. The data 111 is output.

The DV system VTR 105 records image data 111 input in synchronization with a synchronization signal 113 input from the read control circuit 104. At this time, DV system V
The TR 105 records the input image data on a tape in the same manner as in the case where the input image data is normal moving image data. That is, the original image data is the number of horizontal pixels Hn,
Although the still image has the number of vertical pixels Vn, the number of horizontal pixels is 72.
Since normal image data with 0 and 480 vertical pixels is input in synchronization with the synchronization signal, it can be recorded in the same manner as in the case of a normal moving image.

The read control circuit 104 reads the read position information 11 indicating the read position from the storage circuit 102.
4 is also output. The read position information 114 is also input to the DV digital VTR 105. The DV system digital VTR 105 records the input position information 114 in a location different from the image data.

FIG. 4 shows the structure of a track that the DV system digital VTR 105 records on a tape. A tape recorded by the DV system digital VTR 105 constitutes one frame with ten tracks. DV compressed Video
o data is recorded in an area called Video. D
The V-system VTR has an area called VAUX at both ends of the video data. This area is an area for recording auxiliary data of Video data. The information recorded in this area is, for example, information as to whether the TV system is NTSC or PAL, information as to whether or not this Video data is permitted to be copied, and information as to the recording date and time. In the present invention, the read position information 114 output by the read control circuit 104 is recorded in this area. The position information 114 is stored in the storage circuit 10 as shown in FIG.
2 is the coordinates in the upper left storage circuit 102 of the image data 111 read out from inside 2. The position information IA of the image data GA output from the storage circuit 102 is (0,0), and similarly, the position information IB of the image data GB is (H
n-720, 0), position information IC of image data GC
Is (0, Vn-480), and the position information ID of the image data GD is (Hn-720, Vn-480). The position information 114 is an auxiliary data generation circuit in the DV system VTR 105 (corresponding to the auxiliary data generation circuit 307 in FIG. 3).
Together with other auxiliary data into VAUX data.

FIG. 5 shows image data 111 and position information 11.
4 shows how it is recorded on the tape. FIG. 5 shows a case where the predetermined number m is set to three. That is, each 72
0 × 480 image data (GA, GB, GC, G
-D) is recorded on the tape three times. Further, position information (IA, IB,
IC, ID) are recorded in the VAUX area together with the image data. Image data GA, GB, GC, G-
D is repeatedly recorded a predetermined number of times. As described above, even when some data cannot be reproduced due to dropout or the like at the time of reproduction, it can be surely reproduced by repeatedly recording. it can.

Information indicating how many blocks are to be read out from the storage circuit 102 and information indicating which block is read out in each block are recorded in the VAUX area together with the position information as a block ID. .
By inspecting the block ID at the time of reproduction, it can be determined whether or not data of all blocks has been reproduced. FIG. 2 shows an example of four blocks, and each block ID is ID-A, ID-B, ID-A.
C, ID-D.

The configuration of the DV system digital VTR 105 is the same as that shown in FIGS.
The configuration is the same as that in the DV system VTR 306 shown in FIG.
However, the structural blocks necessary to realize the first embodiment include a DV compression circuit 302, an error correction encoding circuit 304, a recording encoding circuit 305, and an auxiliary data generation circuit 3.
07. (Embodiment 2) Next, claim 10 of the present invention, claim 1
Regarding one embodiment corresponding to the invention described in 1,
This will be described with reference to FIGS. 5, 6, and 7. This embodiment is a reproducing apparatus that reproduces a high-resolution still image recorded by using the above-described first embodiment and restores the original image.

In FIG. 6, a DV digital VTR 605, which is a means for reproducing image data, reproduces a tape on which the image data shown in FIG. 5 is recorded. Data reproduced from a Video area on the tape data structure is a DV. The inverse conversion of the compression is performed to restore the image data to 720 × 480 horizontal pixels. Note that the restored image data is not converted into an analog signal, but is output as image data 611 in a state of digital data. Reconstructed image data 6
11 is input to a storage circuit 602 as storage means. The image data 611 is input to the storage circuit 602 in synchronization with a synchronization signal 613 such as a horizontal synchronization signal and a vertical synchronization signal. The synchronization signal 613 is input to a write control circuit 604 serving as a write control unit.

The DV digital VTR 605 is
The position information 614 reproduced from the VAUX area on the data structure of the tape shown in FIG. 5 is input to the write control circuit 604. The storage circuit 602 has a horizontal pixel count Hn and a vertical pixel count V
At least one image data of n can be recorded. The write control circuit 604 determines in which position in the storage circuit 602 the input image data is to be written, according to the input position information 614. The storage circuit 602 is controlled by the writing control circuit 604 and stores the input image data 611 at the coordinate position designated by the writing control circuit 604.

FIGS. 7A to 7E show how the image data 611 is stored in the storage circuit 602. FIG. FIG.
(A) shows a storage area of the image data of the storage circuit 602. A case in which the DV system digital VTR 605 reproduces a recorded tape as shown in FIG. 5 will be described. The DV system digital VTR 605 first reproduces the image data GA and the position information IA. The writing control circuit 604 determines at which coordinate position in the storage circuit 602 the image data GA is to be stored based on the reproduced position information IA. In this example, as shown in FIG. 7B, the image data GA is stored in the storage circuit 602 such that the upper left of the image data GA becomes the coordinates (0, 0) in the storage circuit 602.

In this embodiment, three frames GA and I
-A, the image data GB and the position information I
−B is reproduced and input to the storage circuit 602 and the write control circuit 604, respectively. The writing control circuit 604 determines a coordinate position where the image data GB is stored based on the input position information IB. In this example, as shown in FIG. 7C, the image data GB is stored in the storage circuit 602 such that the upper left of the image data GB is the coordinate (Hn-720, 0) in the storage circuit 602. . Similarly, three frames GB
After that, the image data GC and the position information IC are reproduced, and are input to the storage circuit 602 and the write control circuit 604, respectively. Write control circuit 604
Determines the coordinate position for storing the image data GC from the input position information IC. In this example, as shown in FIG. 7D, the storage circuit 60 is set such that the upper left of the image data GC becomes the coordinates (0, Vn-480) in the storage circuit 602.
2 stores the image data GC. Similarly, when the three frames GC and IC are reproduced, the image data G
−D and position information ID are reproduced and input to the storage circuit 602 and the write control circuit 604, respectively. The writing control circuit 604 determines a coordinate position for storing the image data GD based on the input position information ID. In this example, as shown in FIG. 7E, the image data GD is stored in the storage circuit 602 such that the upper left of the image data GD becomes the coordinates (Hn-720, Vn-480) in the storage circuit 602. Is done.

In this way, still image data having the number of horizontal pixels Hn and the number of vertical pixels Vn is restored in the storage circuit 602.

The block ID (V
(Recorded in the AUX area), it is possible to determine whether all blocks have been reproduced. If it is determined that all the blocks could not be reproduced, it is possible to notify the user, rewind the magnetic tape to the position where the first block is recorded, and replay again. .

Reconstructed number of horizontal pixels Hn Number of vertical pixels Vn
Image data 610 from the storage circuit 602 to the display circuit 60
1 is output under the control of the read control circuit 603.
The display circuit 601 as a display means is composed of, for example, a detachable semiconductor memory and its writing circuit. The image data 610 is written to a removable semiconductor memory in the display circuit. At the time of writing, it may be considered that the data is recompressed into the JPEG format and written. Further, as another example of the display circuit 601, a circuit for converting an analog signal to be output to a television monitor can be considered. However, in this case, since the number of horizontal scanning lines in the current television system is 525, the number of vertical pixels must be converted to 500 or less.

As described above, according to the present embodiment, the first
By reproducing the tape recorded by using the first embodiment, the number of horizontal pixels 7 that cannot be reproduced by the conventional technique is increased.
It is possible to reproduce image data having a pixel number larger than 20 pixels and a vertical pixel number of 480 pixels.

As described in the first and second embodiments, the image data photographed by the high-resolution imaging device is stored in the storage means capable of storing at least one frame, and the DV compression means can process the data from the storage means. The image data of × 480 is divided into a plurality of blocks and read, and each of the image data of 720 × 480 is compressed by the DV compression method and stored on a magnetic tape. At the same time each 720 × 480
The information indicating the position of the high-resolution still image stored in the storage means is also recorded at the same time. Then, the 720 × 480 image data is reproduced from the magnetic tape together with the position information and the DV compression is decoded, so that the image resolution is limited to 720 × 480.
Even when the V compression method is used, a high-resolution still image can be recorded and reproduced. (Embodiment 3) Next, an embodiment corresponding to the invention described in claim 12 of the present invention will be described with reference to FIG. Embodiment 3 is different from Embodiment 1 in that
While the first embodiment records on a tape,
In this embodiment, a DV digital VTR 105 transmits a high-resolution still image to another external device via an IEEE 1394 driver circuit. The minimum required configuration in the present embodiment is the DV compression circuit 302
And an IEEE 1394 driver circuit 303 and an auxiliary data generation circuit 307.

In FIG. 8, as in the first embodiment, still image data having the number of horizontal pixels Hn and the number of vertical pixels Vn are written from the signal source 101 to the storage circuit 102 as recording means. The storage circuit 102 outputs the image data 111 having the number of horizontal pixels 720 and the number of vertical pixels 480 of the portion designated by the read control circuit 104. Also, the read control circuit 104
Indicates the coordinate position read by the storage circuit 102 as the position information 114
Output as The image data 111 is output by D
The DV compression is performed by the DV compression circuit 302 in the V-system digital VTR 105, and the position information 114 is converted into the VAUX by the auxiliary data generation circuit 307 in the DV-system digital VTR 105.
Converted to data. DV compressed image data and V
The AUX data is transmitted to an external device via the IEEE 1394 driver circuit 303. In the prior art, only image data having 720 horizontal pixels and 480 vertical pixels could be transmitted. However, according to the present embodiment, image data having a larger number of pixels can be transmitted after being subjected to DV compression. I can do it. (Embodiment 4) Next, an embodiment corresponding to the invention described in claim 13 of the present invention will be described with reference to FIG. The fourth embodiment is different from the second embodiment in that the second embodiment reproduces data received from an external device via an IEEE 1394 driver circuit 303, whereas the second embodiment reproduces data from a tape. It is to be. The minimum required configuration in the present embodiment is IE
EE1394 driver circuit 303, DV compression decoding circuit 3
12. An auxiliary data detection circuit 317.

In FIG. 9, similarly to the second embodiment, the restored image data 611 and position information 614 are output from the DV system digital VTR 605 as the receiving means. A writing control circuit 604 serving as a writing control unit determines write position coordinates when writing the image data 611 into the storage circuit 602 serving as a storage unit based on the input position information 614. The storage circuit 602 writes the image data 611 at the position determined by the write control circuit 604. When all the image data is written into the storage circuit 602 as in the second embodiment, the image data in the storage circuit 602 is output to the display circuit 601 under the control of the read control circuit 603 which is a read control unit. As described above, in the present embodiment, an image having a larger number of pixels than the number of horizontal pixels 720 and the number of vertical pixels 480 which cannot be received and displayed via IEEE 1394 in the related art can be displayed.

In the present embodiment, not only the data transmitted by the invention of the third embodiment but also the tape recorded by the invention of the first embodiment is reproduced by the conventional DV system VTR, and the reproduced data is transmitted via the IEEE1394. It is possible to display even the data transmitted.

The description of the DV system VTR compatible with NTSC is made throughout the present invention.
A similar effect can be obtained with a DV system VTR corresponding to the system. However, in the PAL DV system VTR, the number of pixels in the vertical direction becomes 576 instead of 480.

[0054]

As described above, according to the data recording / reproducing apparatus of the present invention, the conventional DV compression method can be used as it is.
An object of the present invention is to provide a recording / reproducing apparatus capable of recording / reproducing a high-definition still image having a number of pixels larger than 20 × 480 on a DV-type recording medium.

[Brief description of the drawings]

FIG. 1 is a block diagram of a data recording device according to a first embodiment of the present invention.

FIGS. 2A to 2E are Embodiments 1 and 3 of the present invention.
For explaining how to read out image data from high-definition image data in a data recording device in Japan

FIGS. 3A to 3C are block diagrams of a DV system VTR used in the description of the related art and the present invention.

FIG. 4 is an explanatory diagram of a track format recorded by a DV system VTR.

FIG. 5 is a diagram for explaining a configuration of data recorded on a tape according to the first embodiment of the present invention;

FIG. 6 is a block diagram of a data reproducing apparatus according to a second embodiment of the present invention.

FIGS. 7A to 7E are second and fourth embodiments of the present invention.
For explaining the generation of high-definition image data in a computer

FIG. 8 is a block diagram of a data output device according to a third embodiment of the present invention.

FIG. 9 is a block diagram of a data receiving device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 102 Memory circuit 103, 604 Write control circuit 104, 603 Read control circuit 105, 605 DV system digital VTR 601 Display circuit 602 Storage circuit 605 DV system digital VTR

Claims (13)

[Claims] 1. A first recording means for recording high-definition still image data having a resolution higher than the moving picture resolution of the DV system, and a second recording means for recording high-definition still image data output from the recording means. Means for dividing the high-definition still image data recorded in the first recording means into blocks at a resolution of a predetermined one-frame image in the DV mode moving image mode, and reading the read start position of the read block. A data recording device which records the position data together with the position data to be displayed on the second recording means. 2. The data recording apparatus according to claim 1, wherein the number of divisions of the block and the reading order of each block are recorded together with the high-definition still image data in the second recording means. 3. The data recording apparatus according to claim 1, wherein the high-definition still image data is recorded in the second recording means a plurality of times in a DV mode moving image mode. 4. A high-definition still image data having a higher resolution than the moving image resolution of the DV system is recorded in a first recording means, and a high-definition still image data output from the recording means is recorded in a second recording means. The high-definition still image data recorded in the first recording means is divided into blocks at a resolution of a predetermined one-frame image in the DV mode moving image mode, and the read start position of the read block is determined. A data recording method, wherein the data is recorded in the second recording means together with the position data to be represented. 5. The data recording method according to claim 3, wherein said high-definition still image data is recorded in said second recording means a plurality of times in a DV mode moving image mode. 6. A first method for recording image data at a first resolution in which one frame has a horizontal pixel number H1 and a vertical pixel number V1.
Recording means for recording high-definition image data of a second resolution having the number of horizontal pixels H2 (H2> H1) and the number of vertical pixels V2 (V2> V1), and the recorded second resolution Reading control means for reading the high-definition image data in units of image data blocks of the first resolution H1 × V1, and from which position in the second high-definition image data frame each read image data is read. A data recording device for recording position information indicating image data together with image data. 7. A recording means for recording high-definition image data of the second resolution H2.times.V2 is a detachable memory, and the reading of the memory is controlled by a reading control for reading in units of a block of the first resolution H1.times.V1. The data recording device according to claim 6, further comprising a circuit. 8. The position information has a first resolution H1 × V
7. The data recording apparatus according to claim 6, wherein one block image data unit represents a horizontal position and a vertical position at which reading of the image data of the high-definition image frame is started. 9. The data recording apparatus according to claim 6, wherein position information is recorded in an auxiliary data recording area provided on a magnetic tape of a DV system VTR. 10. One frame is composed of a horizontal pixel number H2 (H2> H1) by combining reproduction means for reproducing image data in which one frame has the number of horizontal pixels H1 and the number of vertical pixels V1 and image data reproduced from the reproduction means. ) The number of vertical pixels V2 (V
2> V1) storage means for generating and storing high-definition display image data; and when storing the reproduced image data reproduced by the reproducing means in the storage means in H1 × V1 block units, Writing control means for storing in the storage means based on position information indicating which position in the high definition display image (H2 × V2) area reproduced together with the high definition display image read out from the storage means A data recording / reproducing device comprising a display unit for displaying data. 11. A data recording apparatus, comprising: first recording means for recording image data at a first resolution in which one frame is a horizontal pixel number H1 and a vertical pixel number V1, and a horizontal pixel number H2 (H2> H1). Second recording means for recording high-definition image data of a second resolution with the number of vertical pixels V2 (V2>V1); and recording the recorded high-definition image data of the second resolution with the first resolution H1 × V1. Read-out control means for reading out each image data block unit, and positional information indicating from which position of the read-out image data the second high-definition image data frame was read out together with the image data, In the device, one frame is the number of horizontal pixels H
1. One frame is composed of a horizontal pixel number H2 (H2> H1) and a vertical pixel number V2 (V2> V1) by combining a reproducing unit for reproducing image data having the number of vertical pixels V1 and image data reproduced from the reproducing unit. Storage means for generating and storing high-definition display image data; and storing the reproduced image data reproduced by the reproduction means in the storage means in units of H1 × V1 blocks, wherein the storage means reproduces the reproduced image data together with the reproduced image data. Writing control means for storing in the storage means based on position information indicating which position in the high definition display image (H2 × V2) area, and display for displaying high definition display image data read from the storage means A data recording / reproducing apparatus characterized by comprising means. 12. An output means for outputting image data of a first resolution in which one frame has a horizontal pixel number H1 and a vertical pixel number V1, a recording means for recording the first resolution image data, and a horizontal pixel number H2 (H2> H1) vertical pixel number V2
Recording means for recording image data of a second resolution (V2> V1), and reading out the recorded one-frame image data of the second resolution in units of image data blocks of the first resolution H1 × V1 Image data output means for reading out, and the output means outputs, together with the image data, position information indicating from which position in the frame image of the second resolution the read image data has been read out. apparatus. 13. A receiving means for receiving image data of a first resolution in which one frame has a horizontal pixel number H1 and a vertical pixel number V1, and a horizontal pixel number H2 (H2> H1) generated from the received image data. Storage means for storing display image data of the second resolution having the number of vertical pixels V2 (V2>V1); readout control means for reading out the stored image data for each block unit of the first resolution H1 × V1; A writing control unit for storing, in the storage unit, position information indicating from which position of the display image the read image data was read together with the image data; and displaying the display image data read from the storage unit. A data receiving device, comprising: