JP3314949B2 - Image data recording method and optical disk - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording image data and, more particularly, to a method for recording image data on a compact disk (CD) standard optical disk and an optical disk.

[0002]

2. Description of the Related Art There is a CD-I (interactive) standard (Green Book) by Philips as a format for recording data on a compact disc in a computer-readable form. As is well known, in addition to audio information, other forms of information such as images, data and text can be recorded. The image may be a natural image in addition to computer graphics.

As a format for recording a natural image, that is, a non-computer generated image on a compact disc, a photo by Kodak Phillips, Inc.
There is a CD standard. It uses a recordable recording medium material and has a data structure readable by a CD-I player. However, since the Photo CD standard was proposed after the CD-I standard, it was incompatible with existing CD-I players. Also,
Even with the introduction of the Photo CD standard, there is no modification to the CD-I standard, and it is not required that a CD-I player be equipped with a photo CD-to-CD-I conversion function.

Therefore, in order to reproduce a natural image from a photo CD with a CD-I player, it was necessary to convert image data in the photo CD format into the CD-I format. For example, in order to reproduce at the same resolution as an interlaced television image, a delta YUV double resolution system, an RGB555 double resolution system, and the like are required.

[0005]

However, existing CD-I players do not have hardware for converting image files in the photo CD format to the CD-I format.
Therefore, this conversion had to be done in software and therefore could not be done in real time.

The present invention has been made in view of such a demand, and
It is an object of the present invention to provide an image data recording method and an optical disk capable of recording image data in a format of a Photo CD standard having compatibility with an -I player.

[0007]

According to the present invention, there is provided a method of recording image data in a computer readable form on an optical disk in a format conforming to the Photo CD standard. Preparing first image data of a predetermined hierarchical resolution; converting the first image data into a computer-readable form to create second image data; and first and second image data Are respectively stored in predetermined areas and assembled in the format, thereby forming a data pack, and a step of writing data of the data pack to an optical disk.

[0008] The method according to the present invention may further comprise the step of reducing the image represented by the second image data to form overview image data, wherein the writing step includes the step of writing the overview image data after the second image data. A step of writing to an optical disc may be included.

[0009] The method according to the present invention may further comprise the step of writing an application program for reading the second image data by a computer to an optical disc.

According to the present invention, an optical disc on which image data is recorded in the format of the Photo CD standard is a disc in which first image data of a predetermined hierarchical resolution digitally representing an original image is recorded in accordance with the format. The data pack includes a first area and a second area in which the first image data is converted into a computer-readable form and the second image data is recorded according to the format.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for recording image data according to the present invention will be described in detail with reference to the accompanying drawings. The embodiment shown in FIG. 1 is an image data recording apparatus for recording a video signal obtained from a video signal source 100 such as a negative film scanner on a compact disk 102 of the Orange Book standard. The video signal source 100 may be a digital electronic still camera, a high-definition television camera, or a communication line. In this embodiment, the negative film scanner reads one frame of an image at high resolution from a color negative film, and outputs digital image data representing the image to its output.
This is an image input device that outputs to 04. The output 104 is connected to the control unit 106. The control unit 106 controls the memory 108 to read and write image data into and from the memory 108, and also controls each functional unit of the apparatus described later to ultimately
This is a control device that controls the recording of image data in 102.
The control instruction is transmitted to the operation display unit 110 connected thereto.
The control state is visually displayed on the operation display unit 110. The operation display unit 110 is an input / output device for inputting an operation instruction of an operator, for example, for reading an image, recording, creating a multi-screen, and visually displaying the state of the system. In this embodiment, the memory 108 stores, for example, high-resolution image data of 2048 × 3072 pixels per frame.
It is also a temporary storage device that forms a work area for performing calculations such as editing.

The compact disk 102 may be a write-once optical disk of the Orange Book standard, and the format for recording image data on the optical disk follows the Photo CD standard in this embodiment. The present invention is not limited to a compact disk, but may be of any type, regardless of the standard or type, for example, the size of a mini-disc, and the requirements of a medium such as a one-time recording type or a write-once type.

The recording of image data on the compact disc 102 is performed by the recording unit 112. The file structure is such that the track is conceptually shown in FIG.
202, a management file area 204, a CDI area 206, a data area 208, and a lead-out (LO) area 210. Among these, the data area 208 is an area in which image data of a plurality of frames are recorded, and this area 208 has an area 248b (FIG. 4) for recording attribute information that can be read by a microcontroller, that is, a photo CD player, as described later. 4) is also included. The CDI area 206 is an area for storing application software executed on a CD-I player, that is, a computer.

As shown in FIG. 3, the data area 208 includes a natural number n of image data areas in which one frame of image data is stored, that is, an image pack 220, and a plurality of reduced images obtained by reducing these individual images. A multi-screen, ie, an overview pack 222 in which an overview or index image is stored. Individual Image Pack 220
In this embodiment, as shown in FIG. 4, data is recorded as a set of data having a maximum of five levels of resolution. More specifically, 1
Regardless of the number of pixels, that is, the resolution, the digital image data representing the original image of the frame has Base data corresponding to the resolution of the basic image and 1 /
Base / 4 data corresponding to the resolution reduced to 4 and Base / 16 data corresponding to the resolution reduced to 1/16 are stored in the areas 242, 244, and 246, respectively. Also, medium resolution image data 4Base and high resolution image data
16Base is also recorded in areas 248 and 250, respectively.
Here, for convenience of explanation, for example, an image having the number of pixels of a standard television system such as NTSC is referred to as a base (Base) image, an image having the same resolution as high-definition television (4Base), and a high-resolution image equivalent to a silver halide photograph The image of high quality (16Base) is called an intermediate resolution image and a high resolution image, respectively.

[0015] Intermediate resolution and high resolution image data 4B
ase and 16Base are recorded in the form of compressed or differential data. Base image and reduced image data Ba
Although se / 4 and Base / 16 are not compressed, the intermediate resolution and high resolution image data 4Base and 16Base are Huffman encoded. Areas 252 and 254 for attribute data IPA and option data IPE are added before and after these areas, respectively, to form an image pack 220 for one frame of image. The attribute data IPA includes, for example, image pack attribute data such as the history of an image, photo processing, and the type of image data source.

The basic image data area 242 and the reduced image data areas 244 and 246 are attribute areas 242a, 244a and 246a which can be read by the microcontroller, respectively.
, Which includes attribute data specific to the pack 220, such as image rotation, highest resolution, and the like. The medium-resolution and high-resolution image data areas 248 and 250 have the same attributes and line pointers as those described above, and are readable by the photo CD player 248a and 250a, and the line pointer and the Huffman quantization table are recorded on the computer. For example, an area 24 that can be read by a CD-I
8b and 250b are provided.

The extension, that is, the option data area 254 is undefined in the above-mentioned Green Book. However, in the present embodiment, this stores the image data for CD-I. In this embodiment, the image data of the basic resolution Base in the image pack 220 is stored in this area 254.
242 is stored in a form readable by the CD-I player. Area 254
At the beginning, a management area 254a is formed. This management area 25
4a stores management data such as image attributes in a form readable by the CD-I player. Thus, in this embodiment,
Photo CD standard compatible with existing CD-I players by storing image data for CD-I in areas that are not specified in the Green Book, for example, using the optional data area 254. It is possible to record image data in the format of.

As shown in FIG. 5, the overview pack 222 includes n areas 270 in which an index, that is, image data representing an overview image is stored. In the index image data, data of 1/16 reduced image Base / 16 of n frames included in the image pack 208 is stored in the corresponding area 270. At the beginning of these areas 270, there is an attribute file (OPA) for the overview pack 222.
2 is formed. The attribute file 272 has, in addition to an area readable by a photo CD player, an area 272a readable by a computer such as a CD-I player.
Following the area 270, the optional data area (OPE) 27
4 is formed. This area 274 is also not defined in the aforementioned Green Book. In the present embodiment, this stores the over-view image data for CD-I. In this area 274, the image pack 2
The image data of the 1/16 reduced image Base / 16 in 20 is assembled into a multi-screen form up to n frames to form a composite screen, which is converted and stored in a form readable by a CD-I player.
As described above, in the overview pack 222 as well, by storing index image data for CD-I in an area whose contents are not specified in the Green Book, for example, the optional data area 274,
Image data can be recorded in Photo CD standard format compatible with CD-I players.

Returning to FIG. 1, the image data in such a format is stored in a compact disc by the recording unit 112.
Recorded at 102. The recording unit 112 is a recording unit that is connected to the control unit 106 by a connection line 114, and is connected to the compact disk 102 in a detachable manner, and records data on the disk 102.

A format converter 118 is connected to the controller 106 via a connection line 116, and the format converter 118
Converts the image data stored in the memory 108 into the photo
This is a conversion function unit that organizes into the format of CD standard and CD-I standard. The control unit 106 also includes an overview creation unit.
120 are connected via a connection line 122, and the overview creation unit 120
This is a functional unit that edits a plurality of, for example, n frames of image data of se / 16 to form multi-screen image data of one frame.

The apparatus also has a data processing unit 124,
This is a processing function unit which is connected to the control unit 106 by a connection line 126 and performs data processing including conversion of image data from the video signal source 100, for example. This data processing includes, for example, a delta YUV double resolution method in which a difference is obtained for each pixel of the subsampled luminance and color difference signals, and an RGB555 double resolution method in which RGB data of three primary colors are encoded with 5 bits each. This includes conversion to image data of a session type. In addition, a reduced resolution hierarchy Base / 16 or Base / 4 is created by thinning out the image data of the original image, or a relatively low resolution image data such as an NTSC television image is interpolated to obtain a high resolution. Image processing for forming image data of 16Base or 4Base hierarchy is also performed. In addition, the aforementioned CDI area
It also edits application programs that are stored in 204 (FIG. 2) and can be run on a computer. This application program mainly consists of optional areas
It includes a function sequence for reading and reproducing the image data of 254 and 274 by a computer such as a CD-I player.

In the operating state, the control unit 106 controls the recording unit 112 to record the management file 204 and the CDI data 206 such as an application program on the compact disc 102 before recording the image data. Application program 206 compact disc 102
The record in the satisfies the CDI bridge standard.
In response to input of an image recording instruction from the operation display unit 110, image data representing the original image recorded on the color negative film, for example, from the video signal source 100 in response to the instruction, is signaled under the control of the control unit 108. Control via line 104
The data is input to 106 and temporarily stored in the memory 108.

The data processing unit 124 reads out the image data from the memory 108 under the control of the control unit 106, and performs thinning to create reduced resolution layers Base / 16 and Base / 4. High resolution hierarchy 16Base with interpolation
And 4Base image data. If necessary, the image data may be converted to a delta YUV double resolution system and / or an RGB555 double resolution system. The resulting image data is again stored in the memory 108. Under the control of the control unit 106, the overview creating unit 120 reads this image data from the memory 108, and forms data for the overview pack 222 from the image data of the reduced resolution hierarchy Base / 16. The resulting overview image data is again stored in the memory 108. At this time, the overview creating unit 120 individually arranges the image data of the reduced resolution hierarchy Base / 16 in the order of the frame number using a predetermined area of the memory 108 and accumulates the image data. As a result, a part of one frame of the index image is formed.

Therefore, the format conversion unit 118 includes a control unit
This image data is read from the memory 108 under the control of 106, and the image data is assembled into the image pack 220. At this time, in this embodiment, the image data 242 of the basic resolution Base is converted into a CD-I format and stored in the option data area 254. The management area 254a at the beginning of the area 254 contains management data such as image attributes in a form readable by the CD-I player. The image pack 220 thus assembled is temporarily stored in the memory 108. The control unit 106 controls the recording unit 112 there, and
From 08, the image pack 220 is read and written on the compact disc 102. In this manner, the image data of a plurality of original images obtained from the video signal source 100 are stored in the respective image packs 220 and sequentially recorded on the compact disk 102. With such an operation, a predetermined area of the memory 108 has
Image data for 222 is sequentially formed.

When an instruction to record an index image is input from the operation display unit 110, the control unit 106 reads out, for example, n frames of overview image data stored in the memory 108 to the format conversion unit 118. The format conversion unit 118 organizes this into an overview pack 222 under the control of the control unit 106. At this time, in this embodiment, an index image of one frame composed of image data of the reduced resolution hierarchy Base / 16 sequentially formed in a predetermined area of the memory 108 is also read, and this is converted into a CD-I format. And stored in the option data area 274. Also, the management area 272a at the beginning of the overview pack 222
Contains management data such as image attributes in a form readable by a CD-I player. The overview pack 222 thus assembled is temporarily stored in the memory 108. Control unit
The 106 controls the recording unit 112 there, reads out the overview pack 222 from the memory 108, and writes it on the compact disc 102.

When the recording of the image data on the compact disk 102 is completed, the control unit 114 records the table of contents (TOC) in the lead-in area and the data area 208
Finally, the lead-out 210 is recorded and the recording operation ends.

A compact disc on which image data is recorded in a format that can be reproduced by a CD-I player as described above
102 can be reproduced not only by a photo CD player but also by a CD-I player. This satisfies the CDI Bridge standard. A playback device such as a CD-I player reads the application program stored in the CDI area 206, and directly reads the application program from the optional area 254 of the image pack 220 or the optional area 274 of the overview pack 222 in accordance with the read application program. Can be read out and reproduced on an image output device such as a video monitor device. Therefore, since there is no need to use the conventional conversion software for the CD-I format, the data can be reproduced in real time by the existing CD-I player.

It should be noted that the embodiments described herein are for explaining the present invention, and variations or modifications that can be made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention. It goes without saying that.

[0029]

As described above, according to the present invention, image data is stored in a computer-readable format using an area whose content is not defined by the compact disk standard. As a result, image data can be recorded in accordance with the Photo CD standard format compatible with existing CD-I players. Further, an image can be reproduced from an optical disc in real time by an existing CD-I player without using a conversion program for the CD-I format.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an embodiment of an image data recording apparatus for realizing an image data recording method according to the present invention.

FIG. 2 is an explanatory diagram conceptually showing a recording format of a compact disc applied to the image data recording device shown in FIG.

FIG. 3 is an explanatory view conceptually showing a recording format of image data in the recording format of the compact disc shown in FIG.

FIG. 4 is an explanatory diagram conceptually showing a recording format of an image pack in the recording format of the image data shown in FIG. 3;

5 is an explanatory diagram conceptually showing a recording format of an overview pack in the recording format shown in FIG.

[Explanation of symbols]

 102 Compact disk 106 Control unit 118 Format conversion unit 120 Overview creation unit 124 Data processing unit 254, 274 Optional data area

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 7/007 G11B 20/10 H04N 5/85

Claims (5)

(57) [Claims] 1. An optical disk having a predetermined format
Image data that records image data in a computer-readable form
The recording method according to any one of the preceding claims, further comprising the steps of:
Preparing image data of the first image data;Image represented byToCompatible with reduced resolution
DoCreating second image data;Convert the first image data into a computer readable form
Creating third image data;  First, SecondAnd the first3Image data of each
Format and assemble the format.
Forming a data pack by writing the data of the data pack onto the optical disc.
IncludingSee The method further comprises: Collects a predetermined number of frames of second image data in a multi-screen form
To form a combined screen, and image data of the formed combined screen.
Data into a computer readable form and
Including a step of forming image data, In the writing step, after the third image data, the
An undefined recording section of the optical disc for the bubble image data.
Minutes in the optional data area. Muko
And a method for recording image data. 2. The method of claim 1, wherein the method further comprises the third image data and the overview image data.
Application for reading data from the computer
Recording an image data on the optical disk . 3. The method according to claim 1, wherein
The format is the Photo CD (Compact Disc) standard
A recording method of image data, which is in a format . (4)The format of the
Image data that records image data in a computer-readable form
The recording device according to Input high-resolution image data of the original image
Powerful high-resolution images Image data input to output data
Means, The high-resolution image data is input and stored.
Enter the image data of the calculation result and the composition result
Image data memory means for storing Inputting the high-resolution image data and inputting the high-resolution image data;
The image data to the resolution of the basic image.
Form and output the base image data, and
Base image data is thinned to reduce the basic image
Base / 4 image data and Bass corresponding to resolution
e / 16 image data is formed and output, and the formed
Base image data is interpolated to 4
16Ba corresponding to Base image data and high resolution
data processing means for forming and outputting se image data; A predetermined number of frames are input to the Base / 16 image data,
The input Base / 16 image data of a predetermined number of frames is
Collectively form a multi-screen to form a composite screen, and
The image data of the synthesized screen is read by the computer.
To form over-view image data and output
Means for creating an overview, Base image data, Base / 4 image data, B
base / 16 image data, 4Base image data, 16
Input Base image data and Overview image data
Input Base image data, Base / 4 image
Image data, Base / 16 image data, 4Base images
Data and 16Base image data in the predetermined format.
-To organize in a predetermined area of the image pack of the mat
The input Base image data is stored in the computer.
Base image data converted to a readable form
Organized into predetermined areas of image packs in a fixed format
And output the input overview image data.
Undefined of the overview pack of the predetermined format
Organize and output in the optional area that is the recording area
Format conversion means; Image data organized in the predetermined format and
And image data organized in a form readable by the computer.
And input the image data to the optical disc.
Recording means for sending and recording to a disc; The image data input means, the image data memory means,
Data processing means, overview creation means, format conversion
Means and control means connected to the recording means. Have The control means firstly outputs from the image data input means.
Received high-resolution image data, and receives the received high-resolution image data.
Image data in the image data memory means,
Next, the stored high-resolution image data is read out and read.
Sent to the data processing means.
Base image based on high-resolution image data
Data, Base / 4 image data, Base / 16 image
Data, 4Base image data and 16Base image
The data is formed and output, and then the output
Image data in the image data memory means.
Reads the stored predetermined number of frames of Base / 16 image data.
And sends it to the overview creating means,
Ba of a predetermined number of frames sent by the window creation means
Performs multi-screen form collection of se / 16 image data
To form a composite screen, and an image of the formed composite screen
Convert the data into a form readable by the computer and
The image data is formed and output.
Of the overview image data
Stored in the image data memory means.
Base image data, Base / 4 image data, B
base / 16 image data, 4Base image data, 16
Read Base image data and Overview image data
And sends it to the format conversion means.
Base image data sent by the
Data, Base / 4 image data, Base / 16 image data
Data, 4Base image data and 16Base image data
Data in the transmitted base image data.
Base image converted to a readable form on a computer
And the image data in the predetermined format.
And output them in a predetermined area of the
The sent overview image data is stored in the predetermined format.
Undefined recording area of overview pack in mat
To be output in the optional area
The output image data is stored in the image data memo
Image data stored in the
Data to the recording means. Image characterized by
Recording of image dataapparatus. 5. The apparatus according to claim 4, wherein
The format is the Photo CD (Compact Disc) standard
Recording of images data, which is a format
Equipment .