JP3125470B2 - Moving image compression data accumulation control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing / editing method for storing and reproducing compressed moving image data in an apparatus such as a personal computer and a workstation.

[0002] In recent years, with the advancement of multimedia, technology for moving image compression / decompression that handles a large amount of data has become indispensable. For this purpose, a moving image coding standard system has been studied and its specifications are being organized. However, no study has been made on a method of controlling the accumulation of images such as playback and editing of the encoded moving image data, and after the moving image compression encoding system was put into practical use, In using the image coding standard system, a method of controlling accumulation of compressed moving image data such as reproduction and editing of encoded moving image data is an indispensable technique.

[0003]

2. Description of the Related Art In a moving image in a device such as a personal computer or a workstation, a coded bit stream for each frame is converted into one frame for each moving image as shown in FIG.
Data in which an encoding parameter is added before image data (PICTURE DATA) is continuously connected. Although the standard coding method for moving images has been studied, a reproducing / editing method for storing and reproducing compressed moving image data has not been studied at present.

[0004]

Under such a conventional situation, a moving picture coding standard system is studied, and when the specifications are put together and a moving picture compression coding system is actually put into practical use, a customer needs to pay attention. When using this system,
It is necessary to be able to use a method for controlling the accumulation of compressed moving image data.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem, and proposes a moving picture compressed data accumulation control method for performing fast forward playback, rewind playback, image sequence insertion / deletion, etc. of compressed moving picture data in an apparatus such as a personal computer or a workstation. The purpose is to provide.

[0006]

Means for Solving the Problems The present invention provides the following means.
Solution to the Problems That is, in the present invention, an embodiment is shown in FIG.
As shown, (1) "Host CPU, RAM, hard disk, C
Connect storage media such as D-ROM via data bus
Equipment such as personal computers and workstations
Video from a video camera, TV, etc.
The image is compressed by the image compression / decompression device, and the encoding parameters are
The storage media as a bit stream to which data has been added.
Relates to a storage control method of the moving image data to be stored in A, the
A header text for controlling the host CPU is stored in the storage medium.
File addition control program, and the bit stream
Are periodically intra-coded from the image compressor.
Immediately before each image frame I-PICTURE
The host using the header / tail addition control program
Under the control of the CPU, header / tail information is added.
And the header of the header / tail information is
-Addition of I-PICTURE just before PICTURE
Address, tail is the address of the I-PICTURE immediately after.
And the header / tail information based on the header / tail information.
The host CPU is controlled by the file addition program.
Is the IP set with the header / tail information.
Plays back and stores moving images based on the ICTURE frame
Perform bi-directional fast forward playback, rewind playback, and editing of moving images
Characterized in that the moving image compression data accumulation control method "
Yes, (2) “The above-mentioned method of controlling accumulation of compressed moving image data”
In the storage medium, the header tail
To perform header address and tail address rewriting control
An image header / tail change program is provided, and the host
The CPU uses the moving image header / tail changing program.
The header address and the text in the bit stream.
Moving image rewriting of file addresses
A compressed data storage control method ", (3)" In addition, moving picture compressed accumulation control side of (1)
The header header in the storage medium.
Header address and tail address held in the header section
Video header that saves a set of data as a file
A tail information storage program is provided, and the host CPU
Using the moving image header / tail information storage program,
The header address text in the bit stream
File address information, and playback / editing of the compressed video data
An operation characterized by being saved as a control information file.
Image compression data accumulation control method ". Further details
A specific description will be given while corresponding to the symbols in the figure.
FIG. 1 shows an embodiment of a moving image compressed data accumulation control method according to the present invention. In the figure, 10 is a device such as a personal computer or a workstation, 11 is a host CPU, 12 is a bus, 2
1 is a header / tail addition control program, 22 is a header / tail change program, 23 is a header / tail information storage program, 30 is an image compression / image decompression device, and 40 is a video camera / TV.

According to the present invention, a host CPU 11 is connected to a RAM 12 via a data bus 14 by a hard disk or a CD.
A device 10 such as a personal computer or a workstation provided with a storage medium 13 such as a ROM,
The moving image input from the device 40 is compressed by the image compression / decompression device 30, and under the control of the host CPU 11, a bit stream having frames to be periodically intra-frame-coded and having a coding parameter added to each frame. A storage control method for a moving image stored in the storage medium 13, wherein a header tail is added to the encoding parameter of the stored moving image inside the storage medium 13, and
A header / tail addition control program 21 for controlling bidirectional fast forward reproduction and rewind reproduction of the moving image to which the header / tail is added is provided.

[0008] Then, the host CPU 11
Using the tail addition control program 21, a header indicating the address of the immediately preceding frame I-PICTURE at the beginning of the information of the frame of the moving image of the bit stream;
The object can be achieved by creating a tail indicating the address of the immediately subsequent frame I-PICTURE and controlling bidirectional fast-forward playback and rewind playback of the moving image of the bit stream.

A moving image header / tail change for rewriting the header address and the tail address of the moving image obtained by adding a header / tail to the encoding parameter of the moving image stored in the storage medium 13. A program 22 is provided.

The host CPU 11 uses the moving picture header / tail changing program 22 to rewrite the header address and the tail address of the moving picture in the bit stream, thereby achieving the object. it can.

Further, a moving image in which information of the header address and the tail address of the moving image obtained by adding a header tail to the encoding parameter of the moving image stored in the storage medium 13 is stored in a file. A header / tail information storage program 23 is provided.

Then, the host CPU 11 uses the moving picture header / tail information storing program 23 to store the header address information and the tail address information of the moving picture in the bit stream in a file such as the storage medium 13. By doing so, the objectives can be achieved.

[0013]

According to the present invention, a header and a tail are added to the coding parameters of a moving image stored in the storage medium 13 and a bidirectional fast forward reproduction and a rewind reproduction of the moving image with the header and the tail added thereto. A header / tail addition control program 21 for performing control is provided.

By doing so, the host CPU
Reference numeral 11 denotes a header indicating the address of the immediately preceding frame I-PICTURE and a tail indicating the address of the immediately following frame I-PICTURE at the head of the information of the frame of the moving image of the bit stream using the header / tail addition control program 21. And control of bidirectional fast-forward playback and rewind playback of a moving image of a bit stream.

Further, a moving image header / tail changing program 22 for rewriting a header address and a tail address of a moving image obtained by adding a header / tail to coding parameters of a stored moving image is provided in the storage medium 13.

By doing so, the header address and the tail address of the moving image of the bit stream can be rewritten by using the moving image header / tail changing program 22. Image sequences can be inserted and deleted.

Further, in the storage medium 13, information of the header address and the tail address of the moving image obtained by adding a header and a tail to the encoding parameter of the stored moving image is stored in a file. A header / tail information storage program 23 is provided.

In this manner, the header address information and the tail address information of the moving image of the bit stream can be stored in a file such as the storage medium 13 using the moving image header / tail information storing program 23. Becomes possible.

As a result, the information of the edited header / tail can be newly managed as a separate file, and various functions can be realized based on this file at the time of reproduction or editing.

[0020]

Next, an embodiment will be described with reference to FIGS. 1, 2 and 4 to 8. FIG. FIG. 1 shows an embodiment of a moving picture compressed data accumulation control method according to the present invention. FIG. 2 is an explanatory diagram of the creation of a header tail in the moving picture compressed data accumulation controlling method of the present invention. FIG. 6 is a diagram illustrating an addition position of a header tail of image data.

FIG. 5 is a diagram showing fast-forward playback and rewind playback of image data in the embodiment of the present invention. FIG. 6 is a diagram showing standard playback and fast-forward playback of compressed moving image data in the embodiment of the present invention. FIG. 7 is a diagram showing insertion of an image sequence in the embodiment of the present invention, and FIG. 8 is a diagram showing deletion of an image sequence in the embodiment of the present invention.

In FIG. 1, a moving image is input from a video camera or a TV 40, and is compressed by an image compression unit of an image compression / decompression device with an encoding parameter added thereto. And finally stored in the storage medium 13 as a bit stream.

Here, a method of adding a header and a tail to the compressed moving image data stored as a bit stream in the storage medium 13 will be described. Note that the ○ symbols in FIG. 1 correspond to the following items (（symbols). The host CPU 11 reads and activates the header / tail addition control program 21, and thereafter performs processing according to the header / tail addition control program 21. First, the stored data (bit stream) is transferred to the host CPU 11. The host CPU 11 reads the encoded information of each frame of the stored data, and reads the IP information as shown in FIG.
A header and a tail are added for each ICTURE.

The header and tail to be added contain an address corresponding to the tail of the immediately preceding frame I-PICTURE in a 1: 1 relationship, and the tail includes the immediately following frame I-PICTU.
An address corresponding to the header of the RE 1: 1 is entered. For example, as shown in FIG. 2, if the address number of the header is “1”, the address of the tail may be “3”, for example. Then, the address number of the header of the next I-PICTURE becomes “3” which is the same as the address of the tail of the immediately preceding I-PICTURE. Here, the addresses need not be consecutive, and are not limited to numbers, and may be a combination of numbers and alphabets in consideration of insertion of an image sequence described later.

In the actual tail position, as shown in FIG. 4, a tail is added immediately after the header to facilitate data reading. However, for the sake of simplicity, the description will be made assuming that a tail is added after I-PICTURE. RA from the frame with header and tail added
The data is transferred to M12 and finally stored in the storage medium 13. When performing various types of editing described below, the moving image data added with the header and tail accumulated in
The program is transferred to the AM 12, and the corresponding programs 22 and 23 are activated to perform necessary editing processing.

The edited moving image data is stored again in the storage medium 13 and displayed on an external TV or the like via the image compression / decompression device 30 as necessary, but the image data is output to an external device. In this case, the added header tail is deleted by the host CPU 11 and then output.

Next, algorithms for the following various editing processes performed using the header and tail addresses will be described. (1) Fast forward playback and rewind of image data (2) Combination of standard playback and fast forward playback (3) Insertion of image sequence (4) Deletion of image sequence (1) Fast forward playback and rewind of image data Returning As shown in FIG. 5, I-PITUR is obtained from the header and the tail.
Fast forward and rewind are performed by following the label (address) of E.

At this time, the image data may be skipped to reproduce the image at a higher speed. (2) Combination of standard playback and fast-forward playback As shown in FIG. 6, any I-PITUR during normal playback
By using a header tail from E to I-PITURE, it may be used for a combination of standard reproduction and fast-forward reproduction or standard reproduction and rewind reproduction. (3) Insertion of Image Sequence When inserting another image sequence at a certain I-PITURE position, as shown in FIG. 7, as a step 1, the I-PITURE at the insertion position is duplicated.

Next, in step 2, another image sequence to be inserted is inserted. Then, based on the address of the tail of the I-PITURE copied in step 1, the addresses of all the header tails after the inserted another image sequence are rewritten so as to be sequential. Make it available for standard playback and rewind playback. (4) Deletion of Image Sequence When deleting an image sequence, as shown in FIG.
As step 1, IP at both ends of the image sequence to be deleted
Copy ITURE.

In step 2, the address of the header of the I-PITURE at the end of the image sequence to be deleted copied in step 1 is rewritten to the same address as the tail address of the I-PITURE at the beginning of the image sequence to be deleted. Later, unnecessary image sequences are deleted.

Using a moving picture header / tail information storage program, the header / tail information of each frame is converted into a file, and is stored and edited separately from the image encoded bit stream.

Although the above-described bit stream is for an image, a bit stream in which an image and a sound are multiplexed can be realized by exactly the same operation.

[0033]

As described above, according to the present invention,
By creating a program that adds a header and a tail with an address to an encoding parameter of each frame I-PICTURE of the encoded bit stream of the moving image compressed data and controls the coding, the bidirectional fast forward of the moving image compressed data is performed. Editing such as reproduction and rewinding becomes possible.

Further, by creating a program for rewriting a header and a tail, a moving image sequence can be easily inserted into or deleted from another moving image sequence.

Further, by creating a program for storing header / tail information in a file, there is an effect that the file management at the time of editing a moving image can be easily performed.

[Brief description of the drawings]

FIG. 1 is an embodiment of a moving image compressed data accumulation control method of the present invention.

FIG. 2 is an explanatory diagram of creation of a header tail in the moving image compressed data accumulation control method of the present invention.

FIG. 3 is a diagram illustrating a configuration of a bit stream of image data.

FIG. 4 is a diagram showing an addition position of a header tail of actual image data according to the present invention.

FIG. 5 is a diagram illustrating fast-forward playback and rewind playback of image data according to an embodiment of the present invention.

FIG. 6 is a diagram showing standard reproduction and fast-forward reproduction of compressed moving image data in the embodiment of the present invention.

FIG. 7 is a diagram showing insertion of an image sequence in the embodiment of the present invention.

FIG. It is a figure showing image sequence deletion in an example of an invention.

[Explanation of symbols]

 Reference Signs List 10 apparatus such as personal computer / workstation 11 host CPU 12 RAM 13 storage medium 14 data bus 21 header / tail addition control program 22 moving image header / tail changing program 23 moving image header / tail information storage program 30 image compression / expansion device Video camera, TV, etc.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Osamu Kawai Inventor Fujitsu Limited (1015, Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture) (72) Inventor Kiichi Matsuda 1015, Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture 56) References JP-A-4-72976 (JP, A) JP-A-4-72977 (JP, A) JP-A-4-318783 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , (DB name) H04N 5/76-5/956 H04N 7/24-7/68 G11B 20/10-20/12

Claims (3)

(57) [Claims] 1. A host CPU, a RAM, and a hard disk
Storage media such as disks and CD-ROMs via a data bus.
Devices such as personal computers and workstations
A video image input from a video camera, TV, etc.
Compression by compression / decompression device
To the storage medium as a bit stream with
The present invention relates to a method for controlling the storage of moving image data to be stored , wherein a header for controlling the host CPU is stored in the storage medium.
A tail addition control program is provided, and the bit stream is periodically transmitted from the image compression device.
Intra-coded image frame I-PICTUR
E, immediately before the header tail addition control program.
Control of the host CPU using the
The header / tail information is formed by adding the header information to the I-PICT.
Enter the address of the I-PICTURE immediately before the TURE
The file indicates the address of the immediately following I-PICTURE, and based on the header / tail information, the header / tail addition pattern.
By controlling the program, the host CPU
・ I-PICTURE set with tail information
Video playback is performed based on the frame, and both
It features fast forward playback, rewind playback, and editing.
A video compression data accumulation control method. 2. The storage medium according to claim 1 , wherein a header address of said header tail is stored in said storage medium.
Video header for dress / tail address rewriting control
A tail change program is provided, and the host CPU operates the moving image header and tail change program.
Header address in the bit stream using
Address and tail address are rewritten.
Moving image compression data accumulation control method. 3. The storage medium according to claim 1 , wherein the header and the tail are held in the storage medium.
Data set of the header address and tail address
Save as a file, moving picture header Te yl information
A storage program is provided, and the host CPU stores the moving image header / tail information storage program.
Gram in the bit stream.
The header address / tail address information is stored in the playback / edit control information file of the compressed video data.
Video compression data storage system characterized by storing
Your way.