JP3247474B2 - Information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus and an optical disk for recording data representing an image or sound.

[0002]

2. Description of the Related Art In recent years, video reproducing devices such as a video tape recorder (VTR) for recording and reproducing video signals and a video disk device for reproducing video signals recorded on a disk have been known. As a device for processing and processing an image represented by a video signal output from such a video playback device and performing image editing, and outputting a video signal representing the edited image,
There is a video editing device. The output of this video editing device is
For example, the video signal is connected to a video tape recorder, and the edited video signal is recorded on a video tape mounted on the video tape recorder.

Using such a device, for example, an original image recorded on a video tape is reproduced, an image captured by a video camera is synthesized with the original image, and the original image is reproduced. There is a demand to mix a new audio signal with the audio signal reproduced at that time. In this case, the synthesized video signal and audio signal can be output to a video tape recorder for recording, and the video signal and the audio signal can be recorded on a video tape for recording.

Recently, as an information recording medium which can replace a conventional cassette tape for recording an audio signal, a mini disk (MD) for recording information in a digital data format.
Is being developed. One of the features of the minidisc is that information representing an audio signal can be easily recorded as compared with a conventional compact disc. This mini-disc includes a read-only mini-disc in which data cannot be written and a recording mini-disc (MD-MO: Mini Disc-Magneto Optical) in which data can be rewritten. This recording mini-disc has a data read-only area and a data rewritable area.
In this read-only area, a lead-in area in which information of a disc is recorded is formed, and in a rewritable area, a recording information of recorded audio data is recorded.
A (USER'S TABLE OF CONTENTS) area, a program area in which audio data is actually recorded, and a lead-out area for indicating the end of the program area are formed. Further, as the recording mini-disc, there is a hybrid mini-disc in which a program area for recording data is formed in a read-only area.

[0005]

However, when the above-described editing process is performed, two types of reproduction and recording are required.
It is necessary to connect each of the video tape recorders and the mixing device (editing device), and to operate these devices separately, so that there is a problem that the operation is complicated. In addition, when preparing devices for performing such processing, there is a problem that if these devices are purchased, they become expensive.

In addition, since a video tape on which the original video and audio are recorded and a video tape on which the video and audio are processed and recorded are separate recording media, it is necessary to store both of them. And in this case,
There was a problem that it took time to manage videotapes.

Further, it is conceivable to use a mini-disc as an information recording medium for recording the video signal and the audio signal as described above. However, the above-described editing processing for handling the video signal cannot be performed.

The present invention eliminates the drawbacks of the prior art, by processing the information reproduced from the optical disk, the information <br/> recording apparatus and an optical disk processed information can be easily recorded on the optical disk The purpose is to provide.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an information recording apparatus for recording information such as images and sounds on an optical disk. Recording and reproducing means for reading data representing information recorded on the optical disk, first storage means for storing data read by the recording and reproducing means, and data stored in the first storage means First conversion means for decoding and converting the information represented by the data, information processing means for processing the information converted by the first conversion means, and information processed by the information processing means. A second converting means for compressing and converting the data into data to be recorded on the optical disc; a second storing means for storing the data converted by the second converting means; a first storing means; And a storage control means for controlling data reading and writing beauty second storage means,
The storage control means controls the recording / reproducing means to read out the data recorded on the optical disk and store the data in the first storage means. Further, the storage control means reads the data stored in the second storage means. It is characterized by reading and recording the read data on an optical disk by controlling a recording / reproducing means.

[0010] In this case, the recording / reproducing means determines that reading of data recorded on the optical disk and writing of data on the optical disk are two times the reproduction time of the information represented by the data.
The storage control means controls the recording / reproducing means so as to read data from the optical disk and write data to the optical disk substantially alternately, so that the data is recorded on the optical disk. It is preferable that data representing information created based on existing data be recorded on this optical disc.

The optical disk includes an area in which time information indicating a recording start time and a recording end time is recorded,
The time information may be control information for writing data representing information processed by the information processing means to the optical disc in correspondence with times representing the recording start time and the recording end time.

In this case, the apparatus includes a control means connected to the storage control means for notifying the storage control means of a processing procedure, and the storage control means transmits a notification indicating the processing procedure from the control means. Receiving the control of the recording / reproducing means on the basis of the time information indicating the recording start time and the recording end time recorded on the optical disc, and writing the data stored in the second storage means on the optical disc. Good.

The data recorded on the optical disk is data representing an image, the second converting means compresses the data representing the image, and the first converting means decompresses the compressed data. Good to do.

In this case, the data recorded on the optical disk may be data representing a moving image.

The data recorded on the optical disk is preferably data representing a still image.

[0016] The data recorded on the optical disk may include data representing sound.

Further, the optical disk is preferably a mini-disc on which data representing information such as images and sounds is recorded in advance and to which data representing this information can be written.

In a recordable optical disk on which data representing information such as images and sounds can be written, the optical disk has data recorded in advance on the optical disk. Is recorded with time information indicating a recording start time and a recording end time for controlling writing of other data.

In this case, the optical disk is preferably a hybrid type mini disk.

[0020]

According to the information recording apparatus of the present invention, the recording / reproducing means reads the data recorded on the optical disk under the control of the storage control means, and the storage control means reads the read data into the first data. It is stored in the storage means. The first conversion means decodes the data stored in the first storage means and converts the data into information represented by the data. The information processing means generates new information based on the information, and converts the generated information into data compressed by the second conversion means. Second
The storage means stores compressed data, and the stored data is written to an optical disk mounted on the recording / reproduction means under the control of the storage control means.

Further, according to the optical disk of the present invention, data representing an image or sound is recorded in advance, and a recording start for recording other data during the reproduction time corresponding to the reproduction time of the data is performed. Time information indicating the time and the recording end time is recorded in advance.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an information recording apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of an image synthesizing apparatus to which the present invention is applied. Referring to FIG. 1, an image synthesizing apparatus 10 reproduces a video signal representing a moving image such as a background image recorded on a mini disc 12, and synthesizes a video signal representing a moving image obtained by imaging the video signal. Then, the apparatus records the video signal synthesized with the image on the mini disc 12 while reproducing the video signal representing the background image. Further, the image synthesizing apparatus 10 reproduces the audio signal recorded on the mini-disc 12, mixes this audio signal with another audio signal, and reproduces the recorded audio signal while performing the reproduction of the recorded audio signal. Is recorded on the mini-disc 12. In the following description, portions not directly related to the present invention are not shown and described, and reference numerals of signals are represented by reference numerals of connection lines in which the signals appear.

The image synthesizing apparatus 10 will be described in detail.
The image synthesizing apparatus 10 is a drive for recording and reproducing data.
14, a reproduction buffer memory 16 for temporarily storing reproduced information, a recording buffer memory 18 for temporarily storing information to be recorded, and a controller for controlling the reproduction buffer memory 16 and the recording buffer memory 18. 20
And a decoder 22 for expanding the read data and outputting the expanded and reproduced video signal and audio signal. Further, the image synthesizing device 10 includes a video camera 24
A synthesizing circuit 26 for synthesizing the video signal captured and input by the decoder 22 with the video signal reproduced by the decoder 22, and mixing the audio signal converted by the microphone 28 with the audio signal reproduced by the decoder 22 It comprises a mixing circuit 28 and an encoder 34 for compressing the synthesized and mixed video and audio signals. Further, the image synthesizing device 10 includes a display unit 40 for displaying an operation state of the device, an operation unit 50 for detecting an operation state of the operator, and an information recording device 10 based on an instruction from the operation unit 50. And a system control unit 60 that controls the entire system.

The drive 14 mounts the mini-disc 12,
Write data to the mounted mini disk 12, and
This is a device for reading data recorded on the mini disk 12. Specifically, the drive 14 has a pair of optical pickups and a magnetic head (not shown) for writing and reading signals, and further, the drive 14 rotates the mini disc 12 at a constant linear velocity based on the position of the optical pickup. It has a drive mechanism for causing The drive 14 irradiates the recording surface of the mini-disc 12 with laser light by an optical pickup. The drive 14 modulates the data input to the input 100 by EMF, converts the modulated signal into a magnetic signal by a magnetic head, and applies the magnetic signal to the surface opposite to the recording surface irradiated with the laser light. Thus, magnetic recording is performed on the magnetic layer formed on the mini-disc 12. In addition, the drive 14
The recording surface is irradiated with a laser beam that is dimmer than that at the time of writing, the recording information corresponding to the state of the reflected light from the irradiated surface is detected, and the data recorded on the mini disk 12 is optically read. As described above, the drive 14 is an optical disk recording / reproducing apparatus of a magneto-optical recording and magnetic field modulation system. Drive 14
Outputs the read data to its output 102. Input 100 and output 102 of drive 14 are each connected to controller 20.

The mini disk 12 mounted on the drive 14
Is an optical disk having a data rewritable area. In detail, referring to FIG. 2, the arrangement of an area where data is recorded on the mini disc 12 is shown. The mini-disc 12 is a hybrid in which a read-only area (ROM) 200 in which data can only be read and a write area (MO) 202 in which data can be written and erased are formed on the inner circumference. Type magneto-optical disk.
In the read-only area 200, a lead-in area 204 in which control information is recorded, and a program area 206 in which information representing image data and audio data representing the background and the like are recorded. This read-only area 200
This is an area created by an injection molding machine using a stamper and in which pits representing recording information have been formed in advance. In the lead-in area 204 of the read-only area 200, there is formed a TOC area 208 in which information representing a table of contents such as disc information, track information and recording information is recorded. In the TOC area 208 of this embodiment, when recording data while reproducing data, a timing signal indicating a recording start time and a recording end time of the data to be recorded is recorded. The write area 202 has a UTOC area 210 in which track information and record information are recorded, and a program area 212 in which actual write data is recorded. In the UTOC area 210, a timing signal indicating an arbitrarily set recording start time and recording end time is recorded.

Returning to FIG. 1, the drive 14 in this embodiment operates based on a control signal input to the input 104. Especially when performing automatic recording during playback,
14 has a function of performing writing and reading at a normal data reading speed or four times the normal data writing speed under the control of the controller 20. In addition,
The writing speed and the reading speed may be any speed that exceeds twice the normal operation, including the seek time of the optical pickup.

The reproduction buffer memory 16 is a memory circuit for storing data read from the mini disk 12 by the drive 14. The reproduction buffer memory 16 stores data input to its input 106 under the control of a memory controller 20 described later, and outputs the stored data to an output 108. The output 108 of the reproduction buffer memory 16 is connected to the decoder 22.

The recording buffer memory 18 is a memory circuit for storing data to be written on the mini disc 12 mounted on the drive 14. The recording buffer memory 16
Under the control of the controller 20 described later, the data appearing at the input 110 is stored, and the stored data is stored at the output 112.
Output to The output of the recording buffer memory 18 is connected to the controller 20.

The controller 20 has a buffer memory for reproduction.
And a control circuit for controlling the recording buffer memory. Specifically, the controller 20 has a function of controlling the reading and writing of the data in the buffer memory, outputs the data appearing at its input 112 to its output 100, and outputs the data appearing at its input 102. The data is output on its output 106. The controller 20 sets the memory capacity of the reproduction buffer memory 16 and writes data to the reproduction buffer memory 16 according to the amount of data stored in the reproduction buffer memory 16 during reproduction. Controller 20
When the amount of data stored in the reproduction buffer memory 16 reaches a predetermined set value, data writing to the reproduction buffer memory 16 is interrupted. Further, the controller 20 sets the memory capacity of the recording buffer memory 18 and reads the stored data according to the amount of data stored in the recording buffer memory 18. When the amount of data stored in the recording buffer memory 18 indicates a predetermined set value, the controller 20 starts reading data from the recording buffer memory 18.

The controller 20 has a function of controlling the drive 14 under the control of a system control unit 60 described later. Specifically, the controller 20 generates a control signal for controlling the drive 14 according to the processing procedure information from the system control unit 60 connected to the input 120, and outputs the control signal to the drive 14 connected to the output 104. To supply.
At the time of normal reproduction, for example, as shown in FIG. 3, the controller 20 controls the drive 14 to read data recorded on the mini disk 12 almost continuously. In the figure, the seek state of the optical pickup provided in the drive 14 is not shown. Also,
The controller 20 controls the operation of the disk 14 at the time of automatic recording during reproduction, for example, as shown in FIG. In this case, the controller 20 outputs a control signal for seeking the optical pickup provided in the drive 14, and further outputs a control signal so that reading and writing are alternately performed. Is operated at four times the speed of normal playback.

Returning to FIG. 1, the controller 20 performs a drive based on the data read from the mini disc 12.
It has a function of controlling data writing to the memory 14. Specifically, the controller 14 has a timer for measuring time, and based on a timing signal indicating a recording start time and a recording end time recorded in the read-only area 200 of the disk 12, the write control to the controller 14 is performed. Perform The controller 20 controls the bus when performing read control and write control.
The reproduction buffer memory 16, the recording buffer memory 18, and the drive 14 are controlled based on an instruction signal appearing at 120 from a system control unit 60 described later. For example, when the controller 20 recognizes that there is a request for automatic recording during reproduction based on the instruction signal appearing on the bus 120, the controller 20
At the start of playback of the mini-disc 12 mounted on 14, the timer is initialized and time measurement is started. When the current time obtained by performing the time measurement coincides with the recording start time indicated by the timing signal recorded on the mini-disc 12, the controller 20 stores the data appearing at the input 110 of the recording buffer memory 18. When the current time obtained by performing the time measurement coincides with the recording end time represented by the timing signal recorded on the mini-disc 12,
Stop reading data from the recording buffer memory 18, and
Further, data writing to the drive 14 is stopped. The controller 20 further notifies the system control unit 60 that the data writing has ended at the recording end time, and cancels the automatic recording request during reproduction. Also, the controller 20
Outputs the information represented by the data to its output 120 based on the data read from the disk 12 and notifies the system control unit 60 of the information.

The decoder 22 is a digital processing circuit that expands data read by the drive 14 and reproduces a video signal and an audio signal from the expanded data. In this embodiment, the decoder 22 is a standard for compressing a moving image.
Decodes data that has been compression-encoded based on the MPEG standard. For example, the decoder 22 separates the data input to the input 108 into a video bit sequence and an audio bit sequence.
The decoder 22 decodes the encoded video bit sequence, performs inverse quantization, and performs two-dimensional inverse discrete cosine transform (two-dimensional ID
CT). The decoder 22 adds a predicted value to the converted data to generate video data representing a reproduced image.
Similarly, the decoder 22 decodes the audio bit sequence to generate audio data. Further, the decoder 22 includes an analog-to-digital conversion circuit for converting digital data into analog, and converts reproduced video data and audio data into analog values to generate analog video signals and audio signals, respectively. The decoder 22 outputs the generated video signal to its output 122 and outputs the audio signal to its output 124. An output 122 of the decoder 22 is connected to the synthesis circuit 26. The video output 122 may be connected to, for example, a display device. In this case, an image represented by the reproduced video signal is displayed on the display screen of the display device. One of the outputs 124 of the decoder 22 is connected to the mixing circuit 28, and the other is connected to the amplifier 30 for power-amplifying the audio signal. The output of the amplifier 30 is further connected to a loudspeaker 32, which converts the audio signal into a voice.

The synthesizing circuit 26 is a video processing circuit for synthesizing images. In this embodiment, the synthesizing circuit 26 is connected to an image represented by a video signal from the decoder 22 input to one input 122 and a video camera connected to the other input 126.
This is an image synthesizing circuit for chroma-key synthesizing an image represented by 24 video output signals. The video camera 24 is a camera for imaging a subject as shown in the figure, and is a device for outputting a video signal obtained by imaging to an output 126 thereof.
The synthesizing circuit 26 outputs the video signal obtained by the synthesis to the output 13 thereof.
Output to 0. One of the outputs 130 of the synthesizing circuit 26 is connected to the encoder 30, and the other is connected to a display 70 for displaying an image represented by the video signal. The display 70 receives the video signal output from the synthesis circuit 26.
130 is a display device for inputting the image data to a composite image represented by the video signal.

The mixing circuit 28 is a mixing circuit for mixing input audio signals. The synthesis circuit 26 mixes the audio signal from the decoder 22 input to one input 124 with the audio signal from the microphone 28 connected to the other input 132. The mixing circuit 28 outputs the mixed audio signal to its output 134. Mixing circuit 28
Output 134 is connected to the encoder 34.

The encoder 34 is an encoding circuit that encodes input data and generates compressed data. Specifically, encoder 34 includes a video signal appearing at input 130,
An analog-to-digital converter is provided for converting the audio signal appearing at the input 134 into a digital value. The encoder 34 converts the data converted into digital values into a data format for compression. In this embodiment, the encoder 34 performs inter-frame prediction encoding for encoding a difference between an input image and a previous reproduced image based on the MPEG standard for compressing information representing a moving image and audio information. The encoder 34 divides an input image into blocks, prepares a motion vector for each block, and performs motion compensation (Motion Compensat
ion). Further, the encoder 34 performs a two-dimensional discrete cosine transform (two-dimensional DCT) on the data of each block, further approximates a DCT transform coefficient obtained by this, and performs Huffman coding on the approximated data. The encoder 34
The compressed data is output on its output 110. Encoder
The output 110 of 34 is connected to the recording buffer memory 18.

The display section 40 is an operation display section for visually displaying information indicating the operation state of the image synthesizing apparatus 10. The display unit 40 displays information represented by the display data input to the input 140. The display unit 40 includes display means such as a liquid crystal or a fluorescent tube, and displays information such as characters represented by display data. The input 140 of the display unit 40 is
It is connected to the. In addition, the display unit 40 may have a function of outputting an oscillating sound by a buzzer that outputs the oscillating sound, thereby performing an audible display.

The operation unit 50 is an input circuit for instructing the image synthesizing apparatus 10 to perform a desired operation. The operation unit 50 includes a basic button such as a play button, a record button, a stop button, and the like in a normal operation. An operation mode selection button for selecting whether to perform data recording and a recording mode selection button for selecting whether to perform recording repeatedly or to perform recording once when performing recording. Also, the operation unit 50 operates in the program area 206 in the operation mode for performing the manual recording.
A setting for starting recording from an arbitrary position of data representing an image recorded on the disk 12 is performed, and a timing signal representing a recording start time and a recording end time is transmitted to the UT of the disk 12.
A button for writing to the OC area 210 is provided. In this case, the UTC of the rewriting area 202 formed on the disc 12
Information indicating a recording start time and a recording end time for performing automatic recording is recorded in the area 210, respectively. Operation unit 50
Outputs operation information indicating the state in which these buttons are operated to its output 142. The output 142 of the operation unit 50 is connected to the system control unit 60.

The system control unit 60 controls the image synthesizing device 10
Is a control circuit for controlling the whole of the control. System control unit 60
Is a drive 14, a controller 20, a decoder 22,
It has a function of controlling the encoder 34. The system control unit 60 is a processing circuit constituted by a microcomputer (Microcomputer), controls the overall operation of the image synthesizing apparatus 10, and stores processing procedure information that defines processing procedures such as data reproduction and recording. It has a function to notify each unit. The system control unit 60 controls the controller 20 according to the operation information from the operation unit 50 input to the input 142. When notified of operation information indicating that the operation mode selection button has been operated from the operation unit 50, the system control unit 60 sets the automatic recording mode or the manual recording mode according to the operation information. When the automatic recording mode is set, the system control unit 60 outputs an instruction signal indicating an automatic recording request during reproduction to its output 120. In addition, when the system control unit 60 arbitrarily writes the recording start time and the recording end time for performing automatic recording during reproduction in the UTOC area 210 of the mini disc 12, the system Output to 20. Further, the system control unit 60
Recognizes information read from the mini-disc 12 by a notification from the controller 20. Further, the system control unit 60 has a function of generating operation information indicating the operation state of the image synthesizing apparatus 10, and outputs the generated operation information to its output 140. For example, the system control unit 60 outputs information notified from the controller 20 and operation information indicating information such as an operation mode and a recording mode to the display unit 40 connected to the output 140.

The operation of the image synthesizing apparatus 10 in the automatic recording mode with the above configuration will be described with reference to FIG. When the power of the image composition device 10 is turned on, the system control unit 60
Detects a signal indicating the operation state from the operation unit 50.
When the operation button of the operation unit 50 is operated, the system control unit
Operation information indicating the operation state is input to 60. For example, when an automatic recording button for automatically recording in synchronization with timing information recorded on the disk 12 is operated, the system control unit 60 sets the automatic recording mode.
Further, the recording mode selection button is operated to select whether to perform recording repeatedly or to perform recording once, and for example, a mode for performing recording once is selected. The system control unit 60 controls each unit according to the set operation mode and recording mode.

At step 300 where the automatic recording mode is set, an automatic recording process during reproduction is performed.
Specifically, a timing signal indicating the recording start time and the recording end time recorded in the TOC area 210 of the disk 12 is read. When this timing signal is read, the timer is initialized by the controller 20 and time measurement is started. Further, the controller 20 sets the memory capacities of the reproduction buffer memory 16 and the recording buffer memory 18. When the processing for automatic recording during reproduction is completed, a reproduction instruction signal is notified from the system control unit 60 to the controller 20, and the process proceeds to step 302.

In step 302, it is determined whether or not an instruction signal for instructing reproduction has been sent from the system control unit 60 to the controller 20. If the instruction signal has been sent, the process proceeds to step 304, where If not, the process ends. In this case, based on the timing information indicating the recording end time, when the time reaches the time measured by the timer, the state is notified from the controller 20 to the system control unit 60, and the system control unit 60 instructs the reproduction. Is released, and the process ends.

In step 304 during the reproduction instruction, the memory capacity set in the reproduction buffer memory 16 is compared with the data capacity actually stored in the reproduction buffer memory 16. In this case, if the data capacity is less than the set value, the process proceeds to step 306, and if the data capacity is equal to or more than the set value, the process proceeds to step 308.

In step 306, the image and the sound are compressed and the data recorded in the program area 206 of the disk 12 is read, and the read data is
The data is stored in the reproduction buffer memory 16. When the stored data reaches the data amount set in step 304, the data is output to the output 108 of the reproduction buffer memory 16 and sequentially input to the input 108 of the decoder 22. decoder
The data input to 22 is decrypted. The decoded image data and audio data are converted into analog video signals and audio signals, respectively. The video signal reproduced by the decoder 22 is output to its output 122,
Entered in 26. In addition, a video signal representing the subject captured by the video camera 24 is output to the output 126 and input to the synthesizing circuit 26. This video signal 126 is the video signal 122
And is output to the output 130 of the synthesizing circuit 26. The synthesized video signal 130 is displayed on the display
The composite image represented by the video signal 130 is input to the screen 70 and displayed on the screen. The video signal 130 output from the synthesizing circuit 26 is input to the encoder 34. On the other hand, the audio signal reproduced by the decoder 22 is output to the output 124 and input to the input 124 of the amplifier 30. The audio signal input to the amplifier 30 is power-amplified, and the amplified audio signal is output to the loudspeaker 32. The loudspeaker 32 converts the sound into a sound represented by the sound signal, and the converted sound is transmitted to the operator. The audio signal 124 output from the decoder 22 is input to the mixing circuit 28. An audio signal 132 representing the operator's voice converted by the microphone 28 is supplied to a mixing circuit.
Entered in 28. Audio signal 124 in mixing circuit 28
And the audio signal 132 are mixed, and the mixed audio signal is output to its output 134. The video signal 130 and the audio signal 134 input to the encoder 34 are
It is converted into digital data and subjected to compression processing such as encoding. The compressed data is output from the output 11 of the encoder 34.
, And are sequentially stored in the recording buffer memory 18.

In step 308, a request for automatic recording during reproduction is output from the system control unit 60, and the
When the automatic recording mode at the time of reproduction is designated, the process proceeds to step 310. If there is no automatic recording request for reproduction from the system control unit 60 in the controller 20, this process ends.

In step 310, a request for automatic recording during reproduction is notified to the controller 20. In step 310, the recording start time is measured by the controller 20 based on the timing information indicating the recording start time read by the drive 14. If the current time matches the current time, the process proceeds to step 312, and
If the current time is less than the recording start time, step 30
Return to 2.

In step 312, the data amount of the data stored in the recording buffer memory 18 is compared with a preset set value. If the data amount exceeds the set value, the process proceeds to step 314, where the data amount is set. If it is less than the value, the process returns to step 302.

In step 314, when the data storage amount of the recording buffer memory 18 exceeds the set value, the data stored in the storage buffer memory 18 is transferred to the controller 20.
And the read data is output to the drive 14. This data is stored on drive 14
The data is written to the program area 212 of the twelve writing areas 202.

The above operation is repeated to produce a mini disc
Data representing video and audio recorded in advance in the twelve program areas 206 are sequentially read, and data output from the encoder 34 is sequentially written in the program area 212 of the mini-disc 12. The read control and the write control are alternately performed by the controller 20 as shown in FIG. 4, and the operations of steps 302 to 314 are repeatedly performed. Also, in step 302,
When the time measured by the timer reaches the recording end time of the timing information, the state is notified from the controller 20 to the system control unit 60, the reproduction instruction signal is released, and the reproduction automatic recording process ends.

As described above, the image synthesizing apparatus 10
By reproducing information representing images and sounds recorded in advance in the read-only area 200 of the mini-disc 12, processing the reproduced data or adding new information to the reproduced data. I have. The processed data is written to the write area 202 of the same mini-disc 12. At this time, the image synthesizing device 10 writes the processed data to the mini-disc 12 based on the timing information indicating the recording start time and the recording end time previously recorded on the mini-disc 12. That is, while reproducing the data recorded on the mini-disc 12, new data related to the data is written on the same mini-disc 12 almost simultaneously. For this reason, the image synthesizing apparatus 10 can easily obtain information obtained by image synthesizing using a predetermined portion of an image recorded in the mini disc 12 in advance. As described above, the image synthesizing apparatus 10 can easily record data obtained by image synthesizing on the mini-disc 12, so that the image synthesizing apparatus 10 is not only used for the purpose of image synthesizing but also for music for which image synthesizing is applied. The present image synthesizing apparatus 10 can be effectively used, for example, for use in practice or education using video and audio.

In this embodiment, the image is chroma-key synthesized by the synthesizing circuit 26. However, the present invention is not limited to this. For example, a predetermined area of an image represented by a video signal read from the disk 12 and reproduced is trimmed. An image represented by the video signal obtained by the camera 24 may be combined with the trimmed area. In this embodiment, the MPEG method is used for data compression and reproduction. However, the present invention is not limited to this. For example, the JPEG method for compressing and reproducing a still image may be adopted as the compression and reproduction method. In this case, a still image in which the captured images are combined can be obtained with the still image recorded on the disk 12 as a background. Further, in this embodiment,
The data recorded on the disk 12 is image data representing an image and audio data representing a sound, but is not limited thereto, and may be, for example, code data representing a character.

[0051]

As described above, according to the image synthesizing apparatus and the optical disc of the present invention, the storage control means controls the recording / reproducing means to read out the data recorded on the optical disc and store it in the first storage means. Further, the storage controller outputs the stored data according to the amount of data stored in the first storage. On the other hand, the storage control means
According to the amount of data stored in the second storage means,
The stored data is read, and the storage control means controls the recording / reproducing means to write the read data to the optical disc. Therefore, with a simple operation, the reproduction of the data recorded on the optical disk and the writing of the data on the optical disk can be performed at substantially the same time and on the same optical disk. Thereby, data related to information represented by data originally recorded on the optical disk can be easily recorded on the same optical disk, and further, the recorded optical disk can be stored,
It is possible to save the trouble of searching for the stored optical disk.

At this time, when this recording and reproduction is performed using an optical disk in which time information indicating the recording start time and the recording end time of the present invention is recorded in advance, the reproduction of data starts. The data recording starts automatically at the time indicated by the time information from
It does not require a complicated operation. Therefore, there is an effect that data based on the information represented by the data recorded on the optical disk can be written to the optical disk more simply and with a single device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of an image synthesizing apparatus according to the present invention.

FIG. 2 is a diagram showing a data area of a mini disk in this embodiment.

FIG. 3 is a diagram schematically showing the operation of a drive during normal reproduction in this embodiment.

FIG. 4 is a diagram showing the operation of the drive during automatic recording during reproduction in this embodiment.

FIG. 5 is a flowchart for explaining the operation of the image synthesizing apparatus in this embodiment.

[Explanation of symbols]

 10 Image synthesis device 14 Drive 16 Playback buffer memory 18 Recording buffer memory 20 Controller 22 Decoder 24 Video camera 26 Synthesis circuit 28 Mixing circuit 30 Amplifier 32 Loudspeaker 34 Encoder 40 Display unit 50 Operation unit 60 System control unit 70 Display

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G11B 7/00 G11B 11/00 G11B 19/02 G11B 27/034

Claims (9)

(57) [Claims] 1. An information recording apparatus for recording information on an optical disk, wherein the optical disk stores a first area in which first information is formed and recorded by a master, and at least second information using light. A composite type optical disc including a second area for reproducibly recording, wherein the apparatus writes the second information on the optical disc and reads the first and second information recorded on the optical disc. Reproduction means; first storage means for storing the first information read by the recording / reproduction means; decoding the first information stored in the first storage means; First converting means for reproducing the first information, information processing means for processing the first information reproduced by the first converting means, and compression of the information processed by the information processing means To record on the optical disc. Second converting means for converting the second information into the second information, second storing means for storing the second information converted by the second converting means, and first and second storing means Storage control means for controlling data reading and writing of the data, the storage control means controlling the recording / reproducing means to read out first information recorded in the first area, and
The second information stored in the second storage means is read out and recorded in the second area substantially alternately, and the second information recorded on the optical disc is read out. An information recording apparatus, wherein second information created based on the first information is recorded in the second area of the optical disc. 2. The information recording apparatus according to claim 1, wherein the recording / reproducing means performs reading of the information recorded on the optical disc and writing of the information on the optical disc twice as long as a reproduction time of the information. An information recording apparatus characterized in that the information recording is performed at a speed exceeding. 3. The information recording apparatus according to claim 1, wherein the optical disc includes an area in which time information indicating a recording start time and a recording end time is recorded, and the time information includes the recording start time and the recording start time. An information recording apparatus, which is control information for writing information processed by the information processing means to the optical disc in correspondence with a time indicating a recording end time. 4. The information recording apparatus according to claim 3, wherein the apparatus includes a control unit connected to the storage control unit and notifying the storage control unit of a processing procedure. Means for receiving the notification indicating the processing procedure from the control means, controlling the recording / reproducing means based on time information indicating the recording start time and the recording end time recorded on the optical disk, An information recording apparatus for controlling the writing of the second information stored in the storage means to the optical disk. 5. The information recording apparatus according to claim 1, wherein the first information recorded on the optical disk is data representing an image, and wherein the first converting means is configured to output the compressed first data. An information recording device for decompressing information. 6. The information recording apparatus according to claim 5, wherein the first information recorded on the optical disc is data representing a moving image. 7. The information recording apparatus according to claim 5, wherein the first information recorded on the optical disc is data representing a still image. 8. The information recording apparatus according to claim 5, wherein the first information recorded on the optical disc includes data representing a sound. 9. The information recording apparatus according to claim 1, wherein the optical disk is a hybrid-type magneto-optical disk on which first information indicating an image, a sound, or the like is recorded in advance, and to which data can be written. An information recording device, characterized in that: