JPH08106721A - Recording apparatus and reproducing apparatus for disc-like recording medium - Google Patents

Abstract

PURPOSE: To record and manage many short-time sounds together with still images by integrating a plurality of short-time sounds into an independent file as a series of data and managing each sound in the file by time. CONSTITUTION: A control part 44 controls a plurality of short-time sounds as one file by time in correspondence to still images. The control part 44 controlling image and sound data-compressing/extending parts 33, 38, a recording/ reproducing part, I.F41 and a recording/reproducing part 42 records/reproduces data of a plurality of still images and corresponding sound data. Every time a shutter is manipulated, still image data and narrations corresponding to the still image data are sequentially recorded to areas of a disc-like recording medium exclusively assigned for image and sound. Since tone control part 44 makes access to the areas to record/reproduce image and sound data, the recording areas can be continuously accessed at high speeds when either of the image and sound is recorded/reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device and a reproducing device for a disk-shaped recording medium on which a plurality of still image data for each minute and audio data corresponding to each still image are recorded, for example, a disk such as a magneto-optical disk. The present invention is applied to an image file system for recording compression-coded still image data and audio data on a recording medium.

[0002]

2. Description of the Related Art Generally, in a digital audio system for recording and reproducing a music signal as digitized audio data, for example, one movement is managed as one file based on the concept of movement.

Further, in an image file system for recording still image data and audio data supplied from the outside on a magneto-optical disk, the still image and the corresponding audio such as narration are managed as independent files. , Still image data and audio data were randomly recorded on the disc.

[0004]

By the way, in the conventional image file system as described above, when a large number of still images are recorded, a large number of short-time voices corresponding to the respective still images become the respective files. There was a problem that the number of files became huge and management became extremely complicated. Particularly, in the file management in which one movement is regarded as one file based on the conventional concept of movement, the number of files is not so small that many short-time voices cannot be handled.

Therefore, in view of the above-mentioned conventional problems, an object of the present invention is to record and reproduce a disk-shaped recording medium in which a plurality of still image data for each minute and audio data corresponding to each still image are recorded. In order to record and manage a large number of still images and a large number of short-time voices corresponding to the respective still images.

[0006]

DISCLOSURE OF THE INVENTION A disk-shaped recording medium recording apparatus according to the present invention is a disk-shaped recording medium for recording a plurality of still image data for each minute and audio data corresponding to each still image on the disk-shaped recording medium. Recording device for controlling access to a data recording area of a disk-shaped recording medium, and still image data recording means for controlling input still image data in the data recording area by the recording control means. And voice data recording means for recording the input voice data in the data recording area, which is controlled by the recording control means, and the recording control means time-controls a plurality of short-time voices in one file, It is characterized in that the still image data recording means and the audio data recording means are controlled while managing the correspondence with the still image.

The disk-shaped recording medium recording apparatus according to the present invention drives a magneto-optical disk as a disk-shaped recording medium at a constant linear velocity to obtain a plurality of still image data for each minute and audio corresponding to each still image. It is characterized by recording data.

A disc-shaped recording medium reproducing device according to the present invention is a disc-shaped recording medium reproducing device in which a plurality of still image data for each minute and audio data corresponding to each still image are recorded. Reproduction control means for controlling access to the data recording area of the medium, still image data reproduction means controlled by this reproduction control means for reproducing still image data from the data recording area, and reproduction control means for controlling audio data. Audio data reproduction means for reproducing data from the data reproduction area, wherein the reproduction control means manages a plurality of short-time sounds in a single file in time, and manages the still image while managing the correspondence with a still image. It is characterized by controlling the image data reproducing means and the audio data reproducing means.

Further, according to the reproducing apparatus for the disk-shaped recording medium of the present invention, a magneto-optical disk as the disk-shaped recording medium is driven at a constant linear velocity to obtain a plurality of still image data for each minute and an audio corresponding to each still image. Characterized by reproducing data.

[0010]

In the recording apparatus for the disk-shaped recording medium according to the present invention,
The recording control means manages a plurality of short-time voices in a single file for a time, and controls the still image data recording means and the audio data recording means while managing the correspondence with the still image, and a plurality of minutes Still image data and audio data corresponding to each still image are recorded on a disk-shaped recording medium.

In the disk-shaped recording medium reproducing apparatus according to the present invention, a plurality of short-time audio signals are reproduced by the reproduction control means.
Time management in one file, while managing the correspondence with still images, controlling still image data reproduction means and audio data reproduction means to obtain a plurality of still image data for each minute and audio data corresponding to each still image. Is reproduced from the disk-shaped recording medium.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a recording device and a reproducing device for a disk-shaped recording medium according to the present invention will be described in detail below with reference to the drawings.

A disk-shaped recording medium recording apparatus and reproducing apparatus according to the present invention are configured, for example, as in the embodiment shown in FIG.

In this embodiment, the present invention is applied to an image file system, which is connected to an image signal input terminal 31 via an image signal input processing section 32 and is connected to an image signal output terminal 35 at an image signal output processing section. Image data compression / expansion processing unit 33 connected via 34, audio signal input terminal 36 connected via audio signal input processing unit 37, and audio signal output terminal 40 via audio signal output processing unit 39. The audio data compression / expansion processing unit 38, the image data compression / expansion processing unit 33, and the audio data compression / expansion processing unit 38 which are connected by the recording / reproduction I / F unit 41.
A recording / reproducing unit 42 connected via a control signal input terminal 43 and a control unit 44 connected to the control signal input terminal 43.
Thus, the image data compression / expansion processing unit 33, the audio data compression / expansion processing unit 38, the recording / reproduction I / F unit 41, and the recording / reproduction unit 42 are controlled.

In this image file system, the image signal input processing section 32 is an analog color image signal supplied from the image signal input terminal 31 from a scanner or a video camera which reads an image from a film or a photograph. Is digitized and supplied as input color image data to the image data compression / expansion processing unit 33.

In this image file system, the image signal input processing section 32 is an analog color image signal supplied through the image signal input terminal 31 from a scanner or a video camera which reads an image from a film or a photograph. Is digitized and supplied as input color image data to the image data compression / expansion processing unit 33.

The image data compression / expansion processor 33 is
In the recording mode, the input color image data supplied from the image signal input processing unit 32 is stored in a frame memory (not shown) in association with the shutter operation, and one screen is displayed on the frame memory with a luminance data block of color image data and a color difference. The image data is divided into a plurality of divided image areas each having a size that is an integral multiple of a minimum coding unit (for example, 640 × 480 pixels) made up of data blocks, and is divided into, for example, three areas as shown in FIG. Divide into 2 × 3 as shown,
JPEG (JPEG: Joint Ph
otgraphic Coding Experts Group) compression processing by block coding. Then, the compressed color image data for each of the divided image areas subjected to the compression processing in this way is recorded / recorded via the recording / reproducing I / F section 41.
It is supplied to the reproducing unit 42. Further, the image data compression / expansion processing unit 33, in the reproduction mode, performs the recording / reproduction I.
By performing decompression processing corresponding to the compression processing on the compressed color image data for each divided image area reproduced from the recording medium by the recording / reproduction section 42 supplied via the F section 41, Reproduction color image data is generated, and reproduction color image data for one screen is reproduced on the frame memory from the reproduction color image data. Then, the reproduced color image data for one screen reproduced on the frame memory is repeatedly supplied to the image signal output processing unit 34 a predetermined number of times.

In this way, the still image data for one screen is divided into a plurality of divided image areas each having an integral multiple of the minimum coding unit in the compression processing,
The compression / expansion procedure does not cause distortion at the dividing boundary,
The screen can be divided and managed.

The image signal output processing section 34 converts the reproduced color image data supplied from the image data compression / expansion processing section 33 into an analog signal in the reproduction mode, and outputs the reproduced analog color image signal as the image signal output terminal 3 described above.
5 is supplied to a monitor device (not shown).

The audio signal input processing section 37 digitizes an analog audio signal supplied from a microphone or the like via the audio signal input terminal 36 to the audio data compression / expansion processing section 38 as input audio data. Supply.

The audio data compression / expansion processing section 38 is
In the recording mode, the input audio data supplied from the audio signal input processing unit 37 is band-division-encoded (SBC: Sub-Band Coding) for about 2 seconds in association with the shutter operation.
Compression processing is performed by, for example, adaptive transform coding (ATC) or adaptive bit allocation. Then, the compressed audio data thus compressed is supplied to the recording / reproducing unit 42 via the recording / reproducing I / F unit 41. Also, this audio data compression / expansion processing unit 38
By performing decompression processing corresponding to the compression processing on the compressed audio data reproduced from the recording medium by the recording / reproducing unit 42 supplied via the recording / reproducing I / F unit 41 in the reproducing mode, Reproduces the reproduced voice data for about 2 seconds. Then, the reproduced audio data for about 2 seconds reproduced on the frame memory is processed by the audio signal output processing unit 3
Supply to 9.

Then, the audio signal output processing section 39 is
In the reproduction mode, reproduced audio data supplied from the audio data compression / expansion processing unit 38 is converted into an analog signal and supplied as a reproduced analog audio signal from the audio signal output terminal 40 to a speaker device (not shown) or the like.

Further, the recording / reproducing unit 42 linearly moves the magneto-optical disk, that is, the disk-shaped recording medium 20 having three data recording areas 21, 22A and 22B divided in the radial direction as shown in FIG. The recording / reproducing is performed by rotating and rotating at a constant speed, and the operation mode is controlled by the control unit 44 and access control is performed to access each data recording area divided into three in the radial direction of the magneto-optical disk. It

In the recording mode, the recording / reproducing unit 42 operates from the image data compression / expansion processing unit 33 to the recording / reproducing I / F unit 41 in conjunction with the shutter operation.
The compressed color image data of each divided image area of the still image data for one screen supplied via the above is recorded in the central data recording area 21 of the disk-shaped recording medium 20, and the audio data compression / expansion processing is performed. Recording / reproduction I from the section 38
The compressed audio data supplied via the F section 41 is recorded in the data recording areas 22A and 22B on the inner or outer circumference side of the disk-shaped recording medium 20, and the management data of image and sound is recorded.

In this way, for each shutter operation, still image data and audio data such as narration corresponding to the still image are sequentially recorded in the data recording areas 21, 22A, 22B of the disc-shaped recording medium 20. As a result, in the disk-shaped recording medium 20, a plurality of still image data are recorded in the central data recording area 21 among the three data recording areas 21, 22A, 22B divided in the radial direction. Data recording areas 22A on the circumference side and the outer circumference side,
Audio data such as narration corresponding to each still image is recorded in 22B.

In the reproducing mode, the recording / reproducing unit 42 compresses the compressed color image data of the still image designated by the control unit 44 from the central data recording region 21 of the disc-shaped recording medium 20 into each divided image region. Is reproduced and supplied to the image data compression / expansion processing unit 33 via the recording / reproduction I / F unit 41, and the management data is reproduced and supplied to the control unit 44. Compressed audio data of a short time audio of about 2 seconds corresponding to the still image is recorded on the inner or outer data recording area 22.
It is reproduced from A and 22B and supplied to the image data compression / expansion processing unit 33 through the recording / reproduction I / F unit 41.

Then, the control unit 44 controls the sound collection data file SOUND. An image data file PIC *** that collects multiple compressed color image data of still images while managing the time of each short-time voice in the SND.
*. Images in the PIC and the audio collection data file SOU
ND. Information indicating the correspondence with the short-time voice in the SND is stored in the image / voice correspondence management file PIC_NAR. Store and manage by INF.

Here, FIG. 4 shows a plurality of image data files PIC ***. PIC and voice collection data file SO
UND. 3 is a directory tree showing files that manage the correspondence between SNDs, images, and audio. In FIG. 4, PIC_SD is a directory in which images and sounds exist, and PIC ***. PIC is an image data file, SOUND. SND is a short-time voice collection file, P
IC_NAR. INF is a management file corresponding to image and sound. A plurality of short-time voices are collected as shown in FIG. 5 into one file SOUND. It becomes SND. In this file, each short time voice is managed by time or data amount. When a specific short-time sound is reproduced, it is realized by reading a part of this short-time sound collection file. The management file PIC_NAR. The INF is a file that stores and manages a plurality of pieces of information for managing, for example, the correspondence between images and short-time voices in correspondence with image numbers, short-time voice start times, and short-time voice end times, as shown in FIG. .

As described above, a plurality of short-time voices are collected as time-sequential data into a single file, and each short-time voice is managed by time in the file, so that the number of files on the recording medium can be reduced. Regardless of the limitation, it is possible to record and manage a large number of voices for a short time as long as the recording capacity allows.

In the image file device having such a structure,
The central data recording area 21 of the disk-shaped recording medium 20 is used as a dedicated recording area for still image data, and the inner and outer data recording areas 22A and 22B are used as dedicated recording areas for audio data. Since access is made to record / play back still image data and audio data, when only one of the still image data or audio data is recorded / played back, the data recording area is continuously accessed at high speed for recording / playback. be able to. Also, when the respective data recording areas are alternately accessed to record / reproduce still image data and audio data alternately, the disc-shaped recording medium 20 is also used.
Since the central data recording area 21 and the inner peripheral side or outer peripheral side data recording areas 22A and 22B are alternately accessed, high speed access can be performed.

[0031]

As described above, according to the present invention, a plurality of short-time voices are collected as temporally continuous data into a single file, and each short-time voice is managed in time in the file. Thus, regardless of the number of files on the recording medium, it is possible to record and manage a large number of voices for a short time as long as the recording capacity allows. Therefore, according to the present invention,
In a recording device and a reproducing device of a disk-shaped recording medium in which a plurality of still image data for each minute and audio data corresponding to each still image are recorded, a large number of still images and a large number of short time periods corresponding to each still image are recorded. Record and manage voice.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an image file system to which the present invention is applied.

FIG. 2 is a diagram showing an example of image division in the image file system.

FIG. 3 is a schematic plan view showing a configuration example of a disk-shaped recording medium used in the image file system.

FIG. 4 is a diagram showing a directory tree for file management in the image file system.

FIG. 5 is a diagram showing short-time sound captured in a sound collection data file in the image file system.

FIG. 6 is a diagram showing the contents of a management image / audio correspondence management file for managing the correspondence between images and short-time sounds in the image file system.

[Explanation of symbols]

 10, 20 Disk-shaped recording medium 11, 12, 21, 22A, 22B Data recording area 31 Image signal input terminal 32 Image signal input processing section 33 Image data compression / expansion processing section 34 Image signal output processing section 35 Image signal output terminal 36 Audio signal input terminal 37 Audio signal input processing section 38 Audio data compression / expansion processing section 39 Audio signal output processing section 40 Audio signal output terminal 41 Recording / playback I / F section 42 Recording / playback section 43 Control signal input terminal 44 Control section

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H04N 5/92 5/928 H04N 5/92 E

Claims (4)

[Claims] 1. A disk-shaped recording medium recording apparatus for recording a plurality of still image data for each minute and audio data corresponding to each still image on a disk-shaped recording medium, wherein a data recording area of the disk-shaped recording medium is accessed. Recording control means for performing control to control the still image data recording means for recording the input still image data in the data recording area by the recording control means, and the recording control means for controlling the input audio data in the data recording area. The audio data recording means for recording the plurality of short time audios in one file, and the still image data recording means while managing the correspondence with the still image. A recording device for a disk-shaped recording medium, which controls an audio data recording means. 2. A magneto-optical disk as the disk-shaped recording medium is driven at a constant linear velocity to record a plurality of still image data and audio data corresponding to each still image. A recording device for the disk-shaped recording medium described. 3. A reproducing apparatus for a disk-shaped recording medium in which a plurality of still image data and audio data corresponding to each still image are recorded, and a control for accessing a data recording area of the disk-shaped recording medium is performed. Reproduction control means, still image data reproduction means controlled by this reproduction control means for reproducing still image data from the data recording area, and audio data reproduction controlled by the reproduction control means for reproducing audio data from the data reproduction area The playback control means controls the still image data playback means and the audio data playback means while managing a plurality of short-time voices in one file in time and managing the correspondence with a still image. A reproducing device for a disk-shaped recording medium, characterized by: 4. A magneto-optical disk as the disk-shaped recording medium is driven at a constant linear velocity to reproduce a plurality of still image data and audio data corresponding to each still image. A reproducing device for the disc-shaped recording medium described.