JP2001035135A - Video reproducing/editing device and video editing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to edit subsidiary information in real time without performing troublesome processing even in the case of setting editing point on the way of display by the subsidiary information at the time of annexing the subsidiary information such as superimposed dialog and title image to reproduced video by the main information. SOLUTION: This video reproducing/editing device is provided with a setting means 1 which sets editing points in the subsidiary information S IN1 and S IN2, a setting means 2 which sets the final point and the final time of the display by the subsidiary information S IN1 for being annexed to the video by the main information D IN before the editing points, a setting means 3 which sets the start point and the start time of the display by the subsidiary information S IN2 for being annexed to the video by the main information D IN after the editing points and an editing means 6 which edits so as to connect the subsidiary information S IN1 and S IN2 before and after the editing points in accordance with the final point and the final time related to the subsidiary information S IN1 which is set by the setting means 2 and the start point and the start time related to the subsidiary information S IN2 which is set by the setting means 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video reproducing apparatus suitable for recording and reproducing video and audio coded information and for synthesizing sub-information such as subtitles and title pictures with main information. The present invention relates to an editing device and a video editing method.

More specifically, when sub-information such as a caption or a title picture (hereinafter also referred to as video material information) is attached to a reproduced video based on the main information, the end point of the display based on the sub-information for the predetermined main information and Based on the final time, the start point of the display by the set sub information, and the start time, the sub information before and after the edit point is edited so as to be joined, and the edit point is displayed in the middle of the display by the sub information. Is set, the sub-information can be edited in real time without performing any troublesome processing.

[0003]

2. Description of the Related Art In recent years, a video disk recording / reproducing system which encodes video / audio information and compresses and writes it on a recording medium such as an optical disk, or decodes encoded data read from the recording medium and reproduces the video / audio information. Devices (hereinafter also referred to as VDRs) have been sold.
Some video recording / reproducing devices of this type have a function of combining sub-information such as subtitles and title pictures with main information.

In a video recording / reproducing apparatus having the sub information editing function, most of graphics used for subtitles, title pictures, and the like attached to video images and the like are required for display for a certain period of time (several seconds). Graphic data and control commands for controlling the graphic data are collected in sub-information. This sub information is sent to the decoder, and the decoder decodes the sub information according to the control command. Such a graphic stream (data string) completed in a certain period is called a page, and a connection of the pages is sub-information.

[0005]

According to the conventional video recording / reproducing apparatus, when editing sub-information such as subtitles and title pictures together with main information, if the editing point is in the middle of a page, To reorganize the graphic stream consisting of new graphic data and control commands starting in the middle of the page, the graphic header file must be created again.

In some cases, the work does not stop at that page, but the contents of the pages before and after that page, such as control commands, must be changed. Therefore, it is troublesome for the user to perform such a graphic header file creation process every time editing is performed, even though the sub-information is information to be attached to the main information. Regardless of the less important secondary information, for example, the video of the main information,
In some cases, a certain logo is displayed throughout the hour.

Further, if the editing has to be performed in real time, such as displaying the sub information in synchronization with the video relating to the main information, it is sufficient to re-create such a graphic header file. There is a problem that a short time cannot be obtained, and the display of the sub information cannot be displayed in time for the display of the main information.

Accordingly, the present invention has been made in view of the above-mentioned problems, and when sub-information such as a caption or a title picture is attached to a reproduced video based on main information, an editing point is displayed in the middle of the display based on the sub-information. It is an object of the present invention to provide a video reproducing / editing apparatus and a video editing method that can edit sub-information in real time without performing complicated processing even when is set.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to reproduce and edit main information relating to video and audio and to edit two or more pieces of sub-information as video material information to be attached to the main information. A first setting means for setting an editing point in the sub-information; and a final point and a final time of the display by the first sub-information for attaching the editing point to the image based on the previous main information. A second setting unit for setting, a third setting unit for setting a display start point and a start time of the display by the second sub-information to be attached to the video by the main information after the edit point; Of the editing point based on the final point and the final time of the first sub-information set by the setting means and the starting point and the start time of the second sub-information set by the third setting means. Connect the first and second sub-information before and after Is solved by the video reproducing editing apparatus characterized by comprising an editing means for editing so that I.

According to the video reproducing / editing apparatus of the present invention,
When two or more pieces of sub-information such as video material information are attached to a video reproduced by the main information,
An editing point is set in the sub-information, and the second setting means sets the last point and the last time of the display by the first sub-information for attaching the editing point to the image based on the previous main information, and the third setting means. Sets the start point and the start time of the display by the second sub-information to be attached to the video by the main information after the edit point. In the editing means, the ending point and the ending time of the first sub-information set by the second setting means, the starting point and the starting point of the second sub-information set by the third setting means are set. Based on the time, the first and second sub-information before and after the editing point are edited so as to be connected.

Therefore, even when an editing point is set during the display of two or more pieces of sub-information, the sub-information effectively using the video material information can be edited in real time without performing troublesome processing. .

[0012] A video editing method according to the present invention is a method for editing two or more pieces of sub-information that is video material information to be attached to main information relating to video and audio.
An editing point is set in the first and second sub-information, and a final point and a final time of display of the first sub-information for attaching the editing point to a video according to the main information before the editing point are set. The start point and the start time of the display by the second sub-information to be attached to the image by the main information after the point are set, and the end point and the end time of the display by the first sub-information and the second The first and second sub-information before and after the edit point are joined based on the start point of display by the sub-information and the start time.

[0013] According to the video editing method of the present invention, when an editing point is set in the middle of display by two or more sub-information when sub-information such as video material information is attached to a reproduced video based on the main information. However, it is possible to edit the sub-information effectively using the video material information in real time without performing any troublesome processing. Therefore, the present invention can be sufficiently applied to a video disc recording / reproducing apparatus that records and reproduces video / audio encoded information and combines sub information such as captions and title pictures with main information.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A video reproducing / editing apparatus and a video editing method according to an embodiment of the present invention will be described below with reference to the drawings. (1) Video Playback Editing Apparatus as Embodiment FIG. 1 is a block diagram showing a configuration example of a video playback editing apparatus 10 as an embodiment according to the present invention. In this embodiment, when sub-information such as a subtitle and a title picture (hereinafter also referred to as video material information) is attached to a reproduced video based on the main information,
Based on the preset end point and end time of the display by the sub information with respect to the main information, and the start point and the start time of the display by the set sub information, the sub information before and after the edit point is joined. Thus, even if an editing point is set in the middle of the display by the sub information, the sub information can be edited in real time without performing any troublesome processing.

The video reproducing / editing apparatus 10 of the present invention reproduces main information DIN relating to video and audio and edits two or more pieces of sub-information as video material information to be attached to the main information DIN. is there. The video material information refers to subtitles, title images, and the like.

In general, video editing refers to setting an editing point EP on each of two video tapes, and setting the editing point EP at 2 points.
It refers to a process of joining video tapes of a book. In this example, the first video tape is the main information DIN1.
It is assumed that the second video tape is composed of the main information DIN2 and the sub information SIN2, and the main information DIN1 and DIN2 are described in the following description.
Is displayed.

The video reproducing / editing apparatus 10 shown in FIG. The control unit 4 is connected to a first setting unit 1, a second setting unit 2, and a third setting unit 3. The setting means 1 is operated so as to set an editing point in at least the first sub information SIN1 and the second sub information SIN2. The setting unit 1 may set an editing point in the main information DIN. The setting means 2 is operated to set the last point and the last time of the display by the sub information SIN1 to be attached to the video of the main information DIN before the editing point.

In the setting means 3, the sub-information SIN2 to be attached to the video by the main information DIN after the editing point is provided.
Is operated to set the display start point and the start time. The control means 4 is connected to the storage means 5 and stores information relating to the editing point, the final point and the final time of the display by the sub-information SIN1, and the start point and the start time of the display by the sub-information SIN2. Such information is temporarily stored.

For example, a decoding end address (hereinafter referred to as DEA information) indicating the decoding end position is set for the last point of the display by the sub information SIN1, and this DEA information is stored in the storage means 5. A presentation end time (hereinafter referred to as PET information) indicating a display output end time is set for the last time of the display by the sub information SIN1, and this PET information is stored in the storage means 5.

Further, as for the starting point of the display by the sub information SIN2, a decoding start address (hereinafter referred to as DSA information) indicating a decoding starting position is set.
The information is stored in the storage means 5. As for the start time of the display by the sub information SIN2, a presentation start time (hereinafter, referred to as PST information) indicating the display output start time is set, and this PST information is stored in the storage means 5.

An editing means 6 is connected to the control means 4, and the last point and the final time of the display by the sub-information SIN1 set by the setting means 2 and the display by the sub-information SIN2 set by the setting means 3. Information SIN1 and SIN2 before and after the edit point based on the start point of the
Are edited so that they are joined together.

In this example, the control means 4 includes an information adding means 4A.
Before the editing point EP is set, for example, flag information is added to the sub information SIN2. Of course, flag information may be added to the sub information SIN1. This flag information indicates whether or not the sub information SIN1 or SIN2 is to be displayed in close synchronization with the main information DIN. This is the case where the flag information is added to the sub information SIN1 or SIN2, and the control means 4 detects the content of the flag information, and based on the content of the flag information, the main information D
The editing means 6 is controlled so that the display by the sub information SIN1 and SIN2 is superimposed on the video by IN.

Next, an operation example of the video reproducing / editing apparatus 10 in the video editing method according to the present invention will be described. In this example, it is assumed that two pieces of sub information SIN1 and SIN2 to be attached to main information DIN relating to video and audio are edited. It is assumed that the flag information is added to the sub information SIN1 and SIN2 before the editing point EP is set. For example, the main information DIN and the sub information SIN1 and SIN1
Flag information indicating whether or not to display in synchronization with IN2 is added by the information adding means 4A. In an embodiment described later, a SYNC flag is added to the sub information SIN1 and SIN2, and the contents are written. When the SYNC flag = 1, the sub information SIN1 and SIN2 are displayed in close synchronization with the main information DIN. When the SYNC flag = 0, the sub information SIN1 and SIN2 are asynchronous with the main information DIN. It is shown to be displayed.

On the premise of these, first, in step A1 shown in FIG. 3, the editing unit EP (Edi) is added to the sub information SIN1 and SIN2 shown in FIG. 2A by the setting means 1 operated by the user.
tingPoint) is set. Here, the editing point EP is also set by the setting means 1 in the main information DIN. Thereafter, in step A2, the setting unit 2 operated by the user sets the last point and the last time of the display by the sub information SIN1 shown in FIG. 2B to be added to the video of the main information DIN before the editing point EP. Is done. At this time, since the DEA information is set for the final point, the DEA information is stored in the storage unit 5. PET information is set for the last time, and the PET information is stored in the storage unit 5.

Then, in step A3, the setting means 3 operated by the user sets the start point and the start time of the display by the sub information SIN2 shown in FIG. 2C to be attached to the image by the main information DIN after the editing point EP. Is set. Here, DSA information is set for the start point, and this DSA information is set.
The A information is stored in the storage unit 5. PST information is set for the start time, and the PST information is stored in the storage unit 5.

Then, in step A4, the DEA information (final point) and the PET information (final time) of the display by the sub information SIN1 and the PSA information (start point) and the PST information (start time) of the display by the sub information SIN2 And based on
Sub-information SIN1 and SIN before and after the edit point EP shown in FIG. 2D
2 are edited by the editing means 6 so as to join the two. Here, the control means 4 checks (detects) the content of the flag information as to whether or not to display the sub information SIN1 and SIN2 in synchronization with the main information DIN. Based on the content of the flag information, the video based on the main information DIN is determined. Sub information SIN1 and SIN2
The editing means 6 is controlled so as to superimpose the display.

Therefore, when it is detected that the contents are not to be displayed in synchronization with the sub information SIN2 in synchronization with the main information DIN, even if the main information DIN is reproduced during the display by the sub information SIN2, the sub information is not displayed. Since the information SIN2 can be decoded and displayed from the beginning of the edit point EP, it is possible to substitute the initially set contents without performing various initial settings again.

Thus, two or more pieces of sub information SIN1, SIN
Even when the editing point EP is set during the display by the second information, the sub-information SIN1 and SIN2 that effectively use the video material information can be edited in real time without performing any troublesome processing. Therefore, a video disc recording / reproducing apparatus (hereinafter referred to as VDR) which records and reproduces video / audio encoded information and combines sub-information such as subtitles and title pictures with main information.
Etc.).

(2) Video Disc Recording / Reproducing Apparatus as Embodiment FIG. 4 is a block diagram showing a configuration example of a video disc recording / reproducing apparatus 100 according to an embodiment of the present invention. In the video disc recording / reproducing apparatus 100 of this example, the above-described video reproducing / editing apparatus 10 is applied, and sub-information SIN such as subtitles and title pictures to be attached to the reproduced video by the main information DIN is
Graphic data necessary for display for a certain period of time (several seconds) and commands for controlling the data are combined into a graphic stream and sent to a decoder, and the decoder decodes the graphic stream. Such a set of data completed in a certain period is called a page, and the data connected to this page is graphic data.

Video disc recording / reproducing apparatus 1 shown in FIG.
Reference numeral 00 denotes an optical head 12 on which the optical disk 11 is mounted. Sub-information SIN such as main information DIN, subtitles, and title images are encoded and multiplexed and recorded on the optical disc 11. Of course, only the main information DIN may be recorded on the optical disk 11. In such a case, sub-information SIN such as subtitles and title pictures is input from another information medium. In this example, when data recorded on the optical disk 11 is reproduced, the optical head 12
1, the main information DIN and the sub information SIN (hereinafter also simply referred to as data) are read.

The optical head 12 has a demodulation / modulation circuit 13
Is connected, and the data read from the optical disk 11 is demodulated. The demodulation / modulation circuit 13 has an ECC (Erro
r Correcting Code) circuit 14 is connected, and data after demodulation processing is input. The ECC circuit 14 performs error correction on the input data. A switch 15 for switching between read and write is connected to the ECC circuit 14.

The switch 15 has a buffer 16 for a read channel and a buffer 29 for a write channel.
Is connected. The switch 15 is connected to the recording / reproducing device 10.
0, the read channel buffer 16 and the EEC circuit 14 are connected when performing the reproducing operation, and when performing the recording operation, the write channel buffer 29 is connected.
And the EEC circuit 14. The switch 15 is controlled to be switched by the system controller 27.

The data after the error correction is output to the read channel buffer 16 through the switch 15. In the read channel buffer 16, input data is temporarily read after being stored once. The read channel buffer 16 includes a demultiplexer 17
Are connected to separate audio data and video data from the input data.

The code buffer 18 and the editing means 6 are connected to the demultiplexer 17. The audio data separated by the demultiplexer 17 is input to a code buffer 18. An audio decoder 20 is connected to the code buffer 18, and audio data output from the code buffer 18 is decoded and output as an audio signal after being decoded.

The editing means 6 in this example includes the code buffer 1
9, a video decoder 21, an adder 22, a cache memory 23, a code buffer 24, and a graphic decoder 25. The editing means 6 joins the sub-information SIN1 and SIN2 before and after the edit point based on the end point and the end time of the display by the sub-information SIN1 and the start point and the start time of the display by the sub-information SIN2. Edited.

For example, the code buffer 19 is connected to the above-described demultiplexer 17, and receives video data (main information) DIN after audio separation. A video decoder 21 is connected to the code buffer 19.
Are output to the adder 22 after the main information DIN appropriately output from is decoded.

The cache memory 23 is connected to the above-described read channel buffer 16 and receives sub-information SIN such as subtitles and title pictures. The sub-information SIN is temporarily stored and output as appropriate. Cache memory 23
Is connected to a code buffer 24 having a predetermined processing capacity, and a graphic stream relating to sub-information SIN such as a caption and a title picture to be attached to a reproduced video according to the main information DIN is collected for each page. This graphic stream is composed of graphic data necessary for display for a certain time (a few seconds) and commands for controlling the graphic data. In this example, the processing capacity (size) of the code buffer 24 is 2 Mbits, and the transfer rate from the cache memory 23 to the code buffer 24 is 50 Kb.
ytes / sec.

A graphic decoder 25 is connected to the code buffer 24, and the data obtained by decoding the graphic data (sub information) SIN compiled by the code buffer 24 is output to the adder 22. This adder 2
An OSD (On Screen Display) control circuit 26 is connected to 2 and outputs control information necessary for scanning processing of a television monitor (not shown). The adder 22 combines the main information DIN, the sub information SIN and the control information. The combined data is output as video data.

On the other hand, the video disk recording / reproducing apparatus 100
Has an encoder 28. For example, optical disk 1
In the case where the main information DIN is recorded in 1, the audio data and the video data to be recorded are input to the encoder 28. In the encoder 28, the audio data and the video data are encoded and encoded. A write channel buffer 29 is connected to the encoder 28,
Encoded video and audio information (hereinafter simply referred to as encoded data) is stored as appropriate.

The write channel buffer 29 is connected to the ECC circuit 14 through the switch 15 and, after an error code is added to the encoded data, the demodulation / modulation circuit 1
3 is output. The demodulation / modulation circuit 13 modulates the encoded data that is sequentially input, and outputs the modulated data to the optical head 12. In the optical head 12, the modulated data is written on the optical disk 11. Demodulation /
An address detection circuit 30 is connected to the modulation circuit 13, and an address on the optical disk 11 is detected from an output of the demodulation / modulation circuit 13.

The video disk recording / reproducing apparatus 100 includes a system controller 27 as the control means 4 described above.
, An optical head 12, a read channel buffer 16, an audio decoder 20, and a video decoder 2.
1, graphic decoder 25, OSD control circuit 26,
Encoder 28 and write channel buffer 2
9 is controlled. The system controller 27 has a CPU (Central Proc.
essing Unit) 31, ROM (Read Only M)
emory) 32 and RAM (Random Ac)
ESS Memory 33.

The system controller 27 controls the optical head 12 based on the address on the optical disk 11 obtained from the address detection circuit 30, and also controls the CPU 31
Here, the operation performed by the system controller 27 is controlled by appropriately using programs and data stored in the ROM 32.

For example, as the information adding means 4A, the CPU 3
1 and the recording / reproducing apparatus 100
At the time of the operation setting, flag information is added to the sub information SIN2. At the time of editing control, the content of the flag information is detected, and the display by the sub information SIN1 and SIN2 is superimposed on the video by the main information DIN based on the content of the flag information. The editing means 6 is controlled as described above.

The RAM 33 is an example of the storage means 5, and data is appropriately stored for a work. For example,
The DEA information and the PET information related to the sub information SIN1 are temporarily stored, and the DSA information and the PST related to the sub information SIN2 are stored.
The information is temporarily stored.

An input section 34 is connected to the system controller 27, and the first setting means 1 and the second setting means 1 shown in FIG.
Of the setting means 2 and the third setting means 3. In this example, when editing the two pieces of sub-information SIN1 and SIN2, the input unit 34 is provided with operation buttons and the like, and the user operates the operation buttons to record or reproduce on the recording / reproducing apparatus 100. You have been able to tell. For example, sub information SIN1 and SIN2
The input unit 34 is operated to set an edit point in
The input unit 34 is operated to set the end point of the display by the sub information SIN1 and the end time thereof, and the input unit 34 is operated to set the start point of the display by the sub information SIN2 and the start time thereof. You.

An interface 35 is connected to the system controller 27 so that data is interfaced between a personal computer (hereinafter, referred to as a PC) 41 and the system controller 27. For example, graphic data (sub information SIN) such as subtitles and title images is
1 to the system controller 27. The sub-information SIN taken into the system controller 27 is temporarily stored in the RAM 33, and is transferred to the code buffer 24 via the read channel buffer 16 and the cache memory 23.

Subsequently, the optical disk 11 recorded or reproduced by the video disk recording / reproducing apparatus 100
The file arrangement on (media) will be described. In this example, the following eleven types of files are recorded on the medium as shown in FIG.

VOLVME.TOC ALBVM.STR PROGRAM TITLE CHUNKGROUP CHUNK MPEGAV SCRIPT PICTURES PBC GRAPHICS

[0049] VOLVME.TOC and ALBVM.STR are placed in this root directory. The directory "PROGRAM" directly under the root directory contains "PROGRAM $$$. P
GI ”(where“ $$$ ”represents the program number). Similarly, the directory“ TITLE ”immediately below the root directory contains“ TITLE ###. VDR ”(where“ ### ”
Represents the title number), but the directory "CHUNKGROU
“P” contains “CHUNKGROVP @@@. CGIT” (where “@@@” represents the chunk group number) and the directory “CHUN
In “K”, “CHUNK %%%%. ABST” (where “%%%%” represents a chunk number) is placed, respectively.

In the MPEGAV directory immediately below the root directory, one or more subdirectories “Streams”
&&& ”(where“ &&& ”represents the stream number) and below it,“ CHUNK %%%%. MPEG2 ”(where“
%%%% ”represents the chunk number).

The file of VOLUME.TOC is stored on the media
There is usually one. However, in media with a special structure, such as media with a hybrid structure of ROM and RAM,
There can be more than one. This file is used to indicate the overall nature of the media.

[0052] The ALBVM.STR file is
There is usually one. However, in media with a special structure, such as media with a hybrid structure of ROM and RAM,
There can be more than one. This file is used to combine a plurality of media into a structure as if it were one media.

The number of PROGRAM $$$. PGI files of “PROGRAM” is equal to the number of programs. The program is composed of a plurality of cuts specifying a part (or all) of the title, and each cut is reproduced in a specified order. There are as many TITLE ###. VDR files as there are titles in “TITLE”. The title is, for example, one song on a compact disc or one TV broadcast program.

There are as many CHUNKGROVP @@@. CGIT files of “CHUNKGROUP” as the number of chunk groups. A chunk group is a data structure for arranging bit streams. This file is not recognized by the user as long as the user normally operates a device for recording and reproducing media, such as a video disc recorder (hereinafter also referred to as VDR).

The file of CHUNK %%%%. ABST of “CHUNK” exists as many as the number of chunks. A chunk is an information file corresponding to one stream file. ”MPEGA
V "Stream S %%%%. MPEG2 file is a stream file. This file stores an MPEG bit stream and is different from other files which record only information. .

"SCRIPT" is a directory for storing information about scripts. “PICTURES” contains thumbnail images (TITLE 001.THUMB, PROGRAM 002.THUMB), J
An ACKET image (TITLE 001.JACKET), a still image independent of a moving image, an image from a digital still camera, and the like are arranged. This is provided as a VDR format to support still image archiving.

"PBC" is a directory in which information on Play Back control is stored. "GRAPHICS"
Is a directory where graphic data relating to the sub information SIN is stored. Below, GRAPHICS HEADER file,
The syntax of the GRAPHICS BODY file is shown below.

GRAPHICS HEADER file {sub stream id 8 sub stream number 8 number of pages 16 for (i = 0; i <num of pages; i ++) {ATS 32 PTS 32 Duratiom 32 reserve 8 address of page 24 reserve 8 page data length 24}} GRAPHICS BODY files {do {page ()} while (nextbits () = page start code)}

[0059] ATS through GRAPHICS HEADER file
For information up to page data length, see GRAPHICS BODY files
This is information about page (). ATS (Arraival Tim
e Stamp) is the time when the first byte of the page is stored in the code buffer 24, and is the time when a 90 KHz clock is used. PTS (Persentation TimeSta
mp) indicates the decoding start time of the page, and 90
This is the time using a KHz clock. page data leng
th represents the size of the data of the page, and the unit is byte.

Duration indicates the time during which the page is valid (the time during which the page is displayed), and is the time when a 90 KHz clock is used. That is, the page is a PTS
The display is started at the time of, and is displayed only for the time indicated by Duration. The address of page is the address information indicating the first byte of the first page, and the GRAPHICS BOD
The beginning of Yfile is set to 0.

A page () of GRAPHICS BODY files is the entity of graphic data (data obtained by compressing a bitmap), and one page corresponds to an access unit in MPEG. When a plurality of pages are displayed, the pages () are arranged in the display order.

Next, an example of the configuration of the single decoder 40 applied by the editing means 6 will be described. FIG. 6 is a block diagram showing a configuration example of the single decoder 40 applied by the editing means 6. The single decoder 40 shown in FIG. 6 includes a code buffer 24 and a graphic decoder 25 connected in cascade. Buffer input Din related to sub information SIN
Is input to the code buffer 24. A graphic stream is output from the code buffer 24 to the graphic decoder 25 at a predetermined timing. The decoded video data Dout is output from the graphic decoder 25.

In this example, MPEG (Moving Picture)
When the main information DIN is video data of the Experts Group (International Organization for Standardization, a standard method for moving picture compression), and graphics such as subtitles and title pictures are sub-information SIN, the main information DIN and sub-data When reproducing the information SIN from the recording medium, regarding the data format of such graphics, data and graphics commands required for graphics to be displayed between a certain time S and E are set before the time S. It is sent to reach the graphic decoder 25, and the decoder starts displaying the graphics at the time S, and displays the graphics according to the graphic command until the time E.

In order to perform such display, PTS and DTS information are added to each page of the graphic stream based on a reference clock (STC). The ATS is as described above, and the DTS (D
"ecoder Time Stamp" is the time at which the first byte of the page is decoded by the graphic decoder 25.

The editing means 6 includes a single decoder 40
, A double decoder 50 is used. The double decoder 50 shown in FIG. 7 has an input selector 42, an output selector 43, two code buffers 24A and 24B, and two graphics 25A and 25B. One set of the code buffer 24A and the graphic 25A are cascade-connected, and the other set of the code buffer 24B and the graphic 25B are cascade-connected. The sub-information SIN is alternately supplied to the two decoders by the selector 42 for input.
Is input, and an output selector 4 is output from the two decoders.
2 alternately outputs video data Dout. Thereby, the decoding process can be executed in parallel.

Subsequently, an editing point EP (Editing Point)
The operation example of the single decoder 40 at the time of non-setting will be described. 8A and 8B, the horizontal axis represents time t. In this example, it is assumed that the editing point EP is not set first. In this case, pages A1, A2, A3, and A3 shown in FIG.
The graphic stream composed of 4, A5, A6,... Is input to the code buffer 24. Pages A1, A
2, 1 to 3 for A3, A4, A5, A6,.
.. Indicate the input timing to the code buffer 24.

In the code buffer 24, the sub-information SIN such as captions and title pictures, which are collected for each page in a predetermined time, takes almost a moving time of "0" and the graphic decoder 2
5 are transferred all at once. The graphic decoder 25 decodes the graphic stream. Therefore, the decoded pages A1, A2, A3, A4, A5, A6
Are sequentially output.

In FIG. 8A, pages A1, A2, A3, A4, A5, A6,.
And pages A1, A2, A related to video data Dout
The streams expressed as 3, A4, A5, A6,... Are shown on different time axes. This is because the graphic stream related to the video data Dout may be displayed longer than the stream related to the buffer input Din. Therefore, even if the pages are the same, the buffer input Din
And the video data Dout
Is different in the time scale (length) on the time axis from the graphic stream according to the above.

Further, a delay time DT is generated between the time when the graphic stream is input to the code buffer 24 and the time when the data is actually decoded and the screen based on the video data Dout is displayed. This delay time D
T is the page A related to the buffer input Din in FIG. 8A.
1, the difference from the page A1 related to the video data Dout. The same applies to the graphic streams related to pages B1, B2, B3, B4,.

Therefore, pages B1, B2, B3, B4 shown in FIG. 8B are used as buffer inputs Din related to the sub information SIN2.
Are input to the code buffer 24, the required time DT is required and the decoded pages B1, B2,
Video data Dout of B3, B4,... Is output.

In FIG. 8A, "Buffer" indicates the remaining capacity characteristic when the processing capacity of the decoder buffer 24 is shown on the vertical axis. This characteristic shows a state where the input of the graphic stream gradually increases with time. When decoding one page relating to the sub information SIN, all the graphic streams required for the page are extracted from the code buffer 24 and moved to the graphic decoder (block) 25 at almost zero time.

The case where the single decoder 40 or the double decoder 50 having the code buffer 24 is used and the first and second sub-information SIN1 and SIN2 are edited so that the code buffer 24 does not overflow will be described. I do.

(3) Example of Operation of Video Disc Recording / Reproducing Apparatus (Part 1) In this example, the first and second sub information SIN1 and SIN2 shown in FIGS. 8A and 8B are added to the editing shown in FIGS. 9A and 9B. When the point EP is set, the DE is set based on the edit point information.
A (Decode End Address) information, PET (Presenta
Option End Time, DSA (Decode Start Ad)
dress) information and PST (PresentationStart Time)
The information is determined. The editing point EP is set in advance by the user, and these pieces of information are determined by the CPU 31 by referring to the graphic header file, and the determination result is read out from the RAM 33.

In the example shown in FIG. 9A, DEA information is set in page A3 of buffer input Din related to sub information SIN1, and PET information is set in page A3 of video data Dout output from graphic decoder 25. DSA information is set in the page B2 of the buffer input Din related to the sub information SIN2 shown in FIG.
The PST information is set in the out page B2.

The pages A1, A2, A3, A4, A
, And the graphic streams related to pages B1, B2, B3, B4,... Have originally different start timings. This is because it is not assumed that a plurality of graphic streams (sub-information) are displayed simultaneously. The start timing is the system time clock (S
ystem Time Clock (hereinafter referred to as STC). When the edit point EP is, for example, 45 seconds in the STC of the graphic stream related to the sub information SIN1, the sub information SIN2
If the STC of the graphic stream according to is 30 seconds, STC (StreamA) = STC (StreamB) +15
It is expressed by the relational expression of seconds.

In this example, the data of the page is started to be transferred from the cache memory 23 to the code buffer 24 at the transfer rate = 50 Kbyte / sec from the ATS time.
After all the data of the page has been transferred to the code buffer 24, all the data of the page are transferred from the code buffer 24 to the graphic decoder 25 at the PTS time.
Is moved with the required time 0.

Under these setting conditions, at the editing point EP, the page B3 related to the sub-information SIN2 from the middle position of the graphic stream of the page A3 related to the first sub-information SIN
It is assumed that editing is performed so that graphics are switched to a position in the middle of the graphics stream.

In this case, the sub information SIN1 before the edit point
9A, DEA information is set in the page A3 of the buffer input Din related to the sub information SIN1 shown in FIG. 9A, and the video data Dou of the graphic decoder 25 is set.
Since PET information is set in page A3 of t,
As shown in the time chart of FIG. 10, the code buffer 24 stores the first sub information SIN relating to the buffer input Din from the graphic stream of the page A1 to the decode end address (DEA) of the graphic stream of the page A3. Is entered. As a result, an image related to the graphic stream of pages A1 to A3 is displayed on a television monitor (not shown).

Further, an editing point (editing point)
At the time of reaching the EP, the graphic stream of the page A3 as well as the graphic stream of the page A1 is pulled out from the code buffer 24 and transferred to the graphic decoder 25 to be empty. And the sub information SIN
Transition to the graphic stream according to FIG.
Since the graphic stream of page B3 shown in FIG. 7 is in the middle of the page, it is not input to the code buffer 24, and the page A where the head of the page comes after the edit point EP
4 is input to the code buffer 24 from the graphic stream.

As a result, the graphics are switched from the middle of the graphic stream of page A3 to the graphic stream of page B4. The graphics related to the sub information SIN1 and SIN2 displayed on the television monitor are displayed halfway through the graphic stream of page A and displayed from the beginning of the graphic stream of graph page B4 as shown in FIG. Note that the latter half of the graphic stream of page A3 and page B3
The graphic stream No. 3 is not displayed.

The case where the contents of the code buffer 24 are cleared at the editing point EP under the setting conditions in the case of (1) will be described. Also in this example, the sub information SIN1 before the edit point
Has the same result as
Editing can be performed regardless of the setting of the EA information.

That is, in the case of the above, as shown in the time chart of FIG.
Sub-information SIN1 related to the buffer input Din from the graphic stream of one to the graphic stream of page A5 reaching the editing point EP is input. Page A
Since the graphic streams of No. 4 and page A5 have not been transferred to the graphic decoder 25, they are not decoded. Therefore, the video related to the graphic stream of the pages A1 to A3 is displayed on the television monitor (not shown) before the editing point in the same manner as in the case of.

The graphic stream from the page A3 to the page B3 switched at the editing point EP is a data transfer from the middle, and not all data is available. Therefore, the graphic decoder 25 cannot decode the graphic stream. . As a result, decoding is performed from the graphic stream B4 in which all the data are complete. Therefore, the graphics related to the sub information SIN1 and SIN2 displayed on the television monitor are displayed halfway by the graphic stream of page A3 and first by the graphic stream of page B4 as shown in FIG. Is displayed.

The case where the decoding (decoding) of the sub-information SIN2 after the editing point is prioritized in the setting condition in the case of will be described. In this example, the editing point EP is set in the middle of the graphic stream of the page B2 related to the sub-information SIN2, and from the middle of the page B2, to be displayed on a television monitor (not shown) from the beginning of the graphic stream of the page B2. Assume decoding. Accordingly, in the screen display, the decoding process is performed while the video data Dout related to the page B2 is disabled, and a process of enabling the video data Dout at the editing point EP indicated by the hatched portion in FIG. 12 is performed.

Here, after the page A1 of the graphic stream relating to the sub information SIN1,
Is assumed to prioritize the input of the graphic stream from page B2 onward. The priority condition at this time is the page A2 of the graphic stream related to the sub information SIN1.
In this case, the time corresponding to the DSA of the page B2 of the graphic stream related to the sub information SIN2 is set earlier than the time corresponding to the DTS. According to these setting conditions, editing can be performed irrespective of the setting of the DEA information in the same manner as in the above case.

In the example shown in FIG. 12, the page A1 of the graphic stream of the sub-information SIN1 waiting for the DTS before the time corresponding to the DSA of the page B2 of the graphic stream of the sub-information SIN2 is input to the code buffer 24. When the DSA time of the page B2 comes, the data of the page B2 is input to the code buffer 24 from that time.

As a result, the graphics are switched from the graphic stream of page A1 to the graphic stream of page B2. Graphics related to the sub information SIN1 and SIN2 displayed on the television monitor are displayed by the graphic stream of the page A1 before the edit point as shown in FIG.
After P, the display is started from the middle of the graphic stream of the page B2, and the display of the pages B3, B4,. Note that the graphic streams of pages A2 and A3,
The graphic stream of page B1 is not displayed.

In the setting condition in the case of, the D of the graphic stream of the page B2 related to the sub information SIN2
A case where the contents of the code buffer 24 are cleared at a time corresponding to SA and the graphic stream of the page B2 is input will be described.

Also in this example, the decoding of the sub-information SIN2 after the edit point is prioritized, and the same result as in the case of
Editing can be performed regardless of the setting of the A information. In other words, in the case of, as shown in the time chart of FIG. 13, the sub-information SIN1 relating to the buffer input Din starting from the graphic stream of page A1 to the graphic stream of page A3 is input to the code buffer 24. However, the contents of the code buffer 24 are cleared at a time corresponding to the DSA of the graphic stream of the page B2 related to the sub information SIN2. Then, the sub information S
The graphic stream of page B2 related to IN2 is input to code buffer 24. Therefore, the graphic streams of pages A2 to A5 are not transferred to the graphic decoder 25 and are not decoded.

As a result, the graphics are switched from the graphic stream of page A1 to the graphic stream of page B2 in the same manner as in the above case. Sub information SIN1, SIN displayed on the TV monitor
As shown in FIG. 13, the graphics related to the graphic No. 2 is displayed by the graphic stream of the page A1 before the edit point, and after the edit point EP, the display starts from the middle of the graphic stream of the page B2, and starts from the middle of the graphic stream of the page B3. , B4... Are continuously displayed. The graphic streams of pages A2 and A3 and the graphic stream of page B1 are not displayed.

The first or second sub information SIN1, SIN
The time at which the graphic stream of the page related to No. 2 has been transferred to the code buffer 24 and the PTS time of the graphic stream of the page need not be the same time. However, in that case, when the graphic stream of the page has been transferred to the code buffer 24,
Subsequently, the transfer of the graphics stream of the next page must be started.

In other words, when the remaining amount in the code buffer 24 is other than 0, the input is always continued at the above-described transfer rate, and the output from the code buffer 24 is P
This is because the data of the page is instantaneously moved to the graphic decoder 25 at the TS time. Therefore, the graphic decoder 25 decodes the graphic stream of the page from the PTS time and displays it for the Duration time. Assuming the above model, it is assumed that graphics data is created by the graphics decoder 25 so as to satisfy this model. In addition, the television monitor (reproducer) may perform reproduction based on this.

Next, an example of the operation of the code buffer 24 relating to the above case will be described. This example is different from the example of FIG. 8, but the sub information SIN shown in FIG. 14 and FIG.
1. Graphics header file related to SIN2 (GRAP
HICS HEADER file) gives specific time information, and an example of the operation of the code buffer 24 for this time information will be described.

In this example, in the graphics header file relating to the sub information SIN1 shown in FIG. 14, 6, 17, and 26 seconds are set in the ATS time column, and 10, 19, and 31 seconds are set in the PTS time column. The duration is set to 7, 9, and 6 seconds. In the Address column, for example, the start position of the graphic stream of each page Ai (i = 1, 2, 3) is indicated by the distance (byte) from the head of the graphics data file.

Therefore, according to this chart, the position of the graphic stream of each page Ai with respect to the graphics data file and the position of the code buffer 2
4, the timing (ATS) for inputting it to the code buffer 24, the timing (PTS) for moving it to the code buffer 24, and the duration (Duration) for which the graphic decoder 25 continues to decode and display it are identified by the CPU 31. .

In the graphics header file related to the sub information SIN2 shown in FIG.
And 26 seconds are set, and 13 and 29 are set in the PTS time column.
Seconds are set, and Duration is set to 15 and 5 seconds. In the Address column, for example, each page B
The start position of the graphic stream of j (j = 1, 2) is indicated by the distance (byte) from the head of the graphics data file. Therefore, as shown in FIG. 15, similarly to the sub information SIN1, the position of the graphic stream of each page Bj with respect to the graphics data file, the timing (ATS) at which it is input to the code buffer 24, and the 2
The CPU 31 can identify the timing (PTS) of moving to the position 4 and the period (Duration) during which the graphic decoder 25 continues to decode and display it.

In this example, it is assumed that the display is switched from the graphic stream of the page Ai related to the sub information SIN1 to the graphic stream of the page Bj related to the sub information SIN2 at the position of the editing point EP = 22 seconds. In the table of FIG. 14, it can be seen that the page A2 is displayed from 19 seconds to 28 seconds, so that it is understood that there is an editing point (point of 22 seconds) during this display period. Therefore, DEA (Dec
ode End Address) is the last address of the page A2, that is, (Point to page A2) +100 KByte. PET (Presentation End Time) is 22 seconds.

Similarly, in the chart of FIG. 15, it can be seen that the page B1 is displayed from 13 seconds to 28 seconds, so that it is understood that there is an edit point (point of 22 seconds) during this display period. Therefore, DSA (Decode Start A)
ddress) is (Point To page B1). PST (Presentation Start Time) is 22
Seconds. The reason why PET and PST have the same value is that, in this example, the editing point EP of the graphic stream of page Ai and the editing point EP of the graphic stream of page Bj are combined and expressed on the same time axis for the sake of simplification. Because.

The graphics header files related to the sub information SIN1 and SIN2 are stored in the RAM 33 or the like in advance. For the case based on these, the sub information S
The case of switching from IN1 to sub information SIN2 will be described. 16 and 17, the vertical axis represents the remaining buffer capacity Mbits of the processing capacity of the code buffer 24, and the horizontal axis represents the time axis T in which one division is 1 second.

In this example, first, the graphic stream of the page A1 related to the sub information SIN1 shown in FIG. That is, until the timing at which the graphic stream of the page B1 related to the sub information SIN2 shown in FIG. 16B is input to the code buffer 24, that is, up to 9 seconds which is the ATS of the page B1, the graphic stream related to the page A1 is input.

Then, the code buffer 24 is cleared at the point of 9 seconds shown in FIG. 17, and thereafter, the graphic stream of the page B1 is input to the code buffer 24. Therefore, the graphic stream of page A1 is cleared during input to the code buffer 24, and is not transferred to the graphic decoder 25. Consequently, the graphic stream of page A1 is not displayed, and the graphic stream of page B1 is not displayed. Is displayed.

In the above and cases, the graphic stream of the page Ai related to the sub-information SIN1 before the edit point is prioritized. In the cases of and, the graphic stream of the page Bj related to the sub-information SIN2 after the edit point Can be prioritized. Therefore, it is possible to perform editing with emphasis on the graphic stream after the edit point compared to the graphic stream before the edit point.
This is because a title image or the like is often displayed by switching scenes.

An operation example using the double decoder 50 under the setting conditions in the case of will be described.

In this example, the double decoder 5 shown in FIG.
When switching from sub-information SIN1 to sub-information SIN2 using 0, the graphic stream of page Ai related to sub-information SIN1 shown in FIG.
A is input until time DEA, and is transferred from the code buffer 24A to the graphic decoder 25A and decoded. On the other hand, the graphic stream of the page Bj related to the sub information SIN2 shown in FIG. 9 is input to the code buffer 24B from the time DSA, and is transferred from the code buffer 24B to the graphic decoder 25B and decoded.

These are switched from the sub-information SIN1 to the sub-information SIN2 at the edit point EP shown in FIG. 18, and the sub-information SIN2 after the edit point follows the graphic stream of the pages A1 to A3 related to the sub-information SIN1 before the edit point. The video by the graphic stream of the pages B2 to B4... Is displayed. As a result, if the graphic decoder 25 has twice the capability of processing with a standard decoder, seamless editing can be performed. As described above, in the case of 〜, the graphic stream can be edited in real time without reprocessing.

(4) Example of Operation of Video Disc Recording / Reproducing Apparatus (No. 2) In the example shown in FIG. 19, DEA information is set in page A4 of buffer input Din related to sub information SIN1, and output from graphic decoder 25. PET information is set in the page A4 of the video data Dout. The page B1 of the buffer input Din related to the sub information SIN2 shown in FIG.
Information is set, and page B1 of the video data Dout is set.
PST information is set in the middle of.

Under the above setting conditions, the single decoder 4
When editing is performed in the same manner as described above and above using 0, the display is switched from the graphic stream of the page A1 related to the sub information SIN1 shown in FIG. 19 to the graphic stream of the page B1 related to the sub information SIN2.

In this example, following the decoding of the graphic stream of page A1, the graphic stream of page B1 is decoded at time DSA. Therefore, it is not necessary to display the page B1 in the shaded portion shown in FIG.
In order to display, it is necessary to decode the graphic stream of page B1 and prepare for display before that. Therefore, the graphic streams of pages A2 and A3 cannot be decoded.
The display of 2, A3 is not performed.

FIG. 20 shows a video disk recording / reproducing apparatus 10.
11 is a time chart showing an operation example (No. 2) of 0 after flag information is introduced. In this example, when the flag information is added to the sub information SIN and the editing point EP is set in the middle of the display by the sub information SIN, the content of the flag information is detected, and the flag information is detected. When it is detected that the sub information SIN is not displayed in synchronization with the main information DIN, the sub information SIN is decoded at the editing point EP and the display of the sub information SIN is superimposed on the video of the main information DIN. Is made.

In this example, the graphic stream of the page B1 related to the sub information SIN2 shown in FIG.
If the same graphics are displayed from the beginning to the end, such as subtitles of “athletic meet”, and the content is irrelevant to the elapsed time, the sub-information S before the edit point
The decoding result of the graphic stream of page B1 related to IN2 is not always necessary, and the sub information SIN of FIG.
Even if the graphic header file is changed as in the graphic stream of page B1 related to 2 ', the contents will be the same after the edit point.

Therefore, a SYNC flag is defined as flag information. This SYNC flag is used for sub-information SIN1, SIN
This indicates whether or not the content is to be displayed in synchronization with the main information DIN. For example, when the display content relating to the sub information SIN2 is to be strictly synchronized with the main information DIN, SYNC
Flag = 1 is described. On the other hand, when the display content relating to the sub information SIN2 does not need to be strictly synchronized with the main information DIN, the SYNC flag = 0 is described.

The SYNC flag = 0 is described in a still picture such as “athletic meet” shown in FIG. 20, or a pattern repeating the same pattern during the display period, or a logo as shown in FIG. This is the case for marks and title images. On the other hand, when strict synchronization with the main information DIN is required, such as subtitles and karaoke lyrics, SY
The NC flag = 1 is described. This SYNC flag is provided for each page.

Therefore, if the SYNC flag is “0”, it is handled so as to permit the change (rewriting) of the contents of the graphic header file at the time of editing. Also, the sub information S
The position of page B1 on the graphic stream of IN2 can also be moved within a range where the code buffer 24 does not overflow. This makes it possible to shift the time PTS of the page B1 relating to the sub information SIN2 backward so as to be at the editing point EP, so that there is no need to decode before the editing point EP.

FIG. 21 is a time chart showing an operation example in the video disc recording / reproducing apparatus 100 to which the flag information is applied. In this example, the hatched graphic streams A2 and A3 shown in FIG. 19 can also be displayed before the editing point.

It is assumed that SYNC flag = 0 is described in page B1 of sub information SIN2. On the basis of this, if editing is performed using the single decoder 40 under the setting conditions shown in FIG. 19, the sub information SIN1 shown in FIG.
The display is switched from the graphic stream of page A3 related to the sub-information SIN2 to the graphic stream of page B1 related to the sub-information SIN2.

That is, following the decoding of the graphic stream of the page A1, the graphic stream data of the pages A2 and A3 is transferred from the code buffer 24 to the graphic decoder 25. At time DSA, the transfer from the graphic stream of the page A3 related to the sub information SIN1 to the graphic stream of the page B1 related to the sub information SIN2 is switched.

Therefore, at the editing point EP, the page A3
The display can be switched to the video data Dout by the page B1 following the video data Dout by the.
As a result, the number of pages A2 and A3 by the graphic stream displayed before the editing point can be increased.

Subsequently, FIGS. 14 and 15 of the operation example (part 1) of the video disk recording / reproducing apparatus 100 described above.
In the case of (1), an operation example of the code buffer 24 in which the SYNC flag is introduced will be described.

In this example, in the graphic stream of page B1 in which the SYNC flag = 0 is set, A
It is assumed that changes in TS, PTS, and Duration are allowed. Even though these ATSs and PTSs can be freely changed, the transfer rate to the code buffer 24 is 50%.
Kbyte / sec, 2Mbits code buffer 2
That is, the processing capacity of No. 4 may be changed within a range not to overflow.

Checking whether these conditions are satisfied can be realized only by the description information in the graphic header file. In this example, the graphic stream related to the changed page Bi is described as sub-information SIN2 '. If this is expressed in the same manner as in the case of FIG.
2 is obtained.

In this example, the graphic stream is not actually created based on the edited result, but is simply reproduced by connecting the graphic streams of the pages Ai and Bj relating to the sub-information SIN1 read from the optical disk 11. It is not necessary to actually rewrite such a graphic header file, and the CPU 31 that controls the playback device only needs to interpret such a change and control the editing unit 6.

In the example shown in FIG. 22, in the graphics header file relating to the sub-information SIN2 ', 18 seconds and 26 seconds after the change are set in the ATS time column and 22 seconds after the change in the PTS time column. And 29 seconds are set, Dur
The ation time is set to 6 seconds and 5 seconds after the change. Of course, these changes can be made by setting the SYNC flag of page B1 =
In consideration of the fact that it is 0 and the fact that the edit point EP is a point of 22 seconds, the CPU 31 determines and performs the processing.

In the Address column, for example, the start position of the graphic stream of each page Bj (j = 1, 2) is indicated by the distance (byte) from the head of the graphics data file. Therefore, FIG.
2, the position of the graphic stream of each page Bj with respect to the graphics data file after the change, the timing of inputting the graphic stream to the code buffer 24 (ATS), and the timing of moving it to the graphic decoder 25 (PTS); A period (Duratio) for which the graphic decoder 25 continues to decode and display it.
n) and the like can be identified by the CPU 31. A description will be given of a case where the sub information is switched from the sub information SIN1 to the sub information SIN2.

In this example, first, the graphic stream of the page A1 related to the sub information SIN1 shown in FIG. That is, until the timing at which the graphic stream of the page B1 related to the sub information SIN2 shown in FIG. 23B is input to the code buffer 24, that is, up to 18 seconds which is the ATS of the page B1, the graphic streams related to the pages A1 and A2 are input. You.

Then, the code buffer 24 is cleared at the point of 18 seconds shown in FIG. 24, and thereafter, the graphic stream of the page B1 is input to the code buffer 24. Accordingly, the transfer of page A1 is completed, but the graphic stream of page A2 is stored in code buffer 2
4 is not transferred to the graphic decoder 25 during input to the graphic decoder 25, so that the display related to the graphic stream of the page A2 is not performed, and the page A2 is not displayed.
Subsequent to 1, the graphic stream of the page B1 is displayed from the beginning. Thus, in the case of the above-described operation example (part 1) of the video disk recording / reproducing apparatus 100, the page A1 that has not been displayed can be displayed.

Next, an example of inputting the graphic stream before and after the change to the code buffer 24 will be described.

In the example shown in FIG.
Is stored in the code buffer 24 at the time ATS =, where the first byte of the graphic stream of the page B1 before the change related to the sub-information SIN2
9 seconds is a case where ATS is changed to 18 seconds. The process of changing the ATS information within a range in which the code buffer 24 does not overflow will be described below.

In this example, page B related to sub information SIN2
It is assumed that a SYNC flag is added to the graphic stream No. 1 and a process of delaying the display of the page B by the graphic stream by a maximum of L seconds. Based on this, step B1 of the flowchart of FIG.
First, it is determined whether the SYNC flag = 0 or the SYNC flag = 1. If the SYNC flag = 1, the contents of the graphic header file cannot be changed, so the control is terminated without changing the graphic stream. If the SYNC flag is "0", the contents of the graphic header file can be changed.
Move to.

In this step B2, L = PST- (DS
A. PTS). L is the code buffer 24
Is the maximum allowable time within which the display of the graphic stream of the page Bi related to the sub-information SIN2 can be delayed within a range where overflow does not occur. DSA. P is D
Refers to the page indicated by the SA. The maximum allowable time L is a value obtained by subtracting the decoding start time (PTS information) of the graphic stream of the page Bi related to the sub information SIN2 from the display start time (PST information) based on the sub information SIN2.

Thereafter, the flow shifts to step B3 to determine whether L> 0 or L ≦ 0. If L> 0, the contents of the graphic header file can be changed, so that the process proceeds to step B4. If L ≦ 0, the control ends because the contents of the graphic header file cannot be changed.

Therefore, if L> 0, NL = PST- (NP ATS) is calculated in step B4 to detect the oversize of the code buffer 24. NL is the maximum occupation time that the graphic stream of the page Bi related to the sub information SIN2 can occupy within a range that does not overflow the code buffer 24. N. P is DS
A. Refers to the page following P. The maximum occupation time NL is the time (ATS information) from the start time of display by the sub information SIN2 (PST information) to the time when the first byte of the graphic stream of the next page Bi + 1 related to the sub information SIN2 is stored in the code buffer 24. This is the value after subtraction.

Thereafter, the flow shifts to step B5, where NL> 0
Or NL ≦ 0. If NL> 0, the contents of the graphic header file can be changed, so that the process proceeds to step B6. If NL ≦ 0, the control ends because the contents of the graphic header file cannot be changed.

Therefore, when NL> 0, in order to detect the oversize (OVSize) of the code buffer 24, OVSize = ｛(NL × Trate) +
(Length of DSA.P)｝ − BufferSize is calculated. Here, Trate is a transfer rate of data to the code buffer 24, which is 50 Kbyte / sec in this example. DSA. The length of P is the data amount (length) of the graphic stream of the page Bi related to the sub information SIN2.
It is. BufferSize is the processing capacity of the code buffer 24, and is 2 Mbits in this example. The oversize of the code buffer 24 is calculated from the value obtained by adding the data amount of the graphic stream of the page Bi to the product of the above-described maximum occupation time NL and the transfer rate.
Is the value obtained by subtracting the processing capacity of

Thereafter, the flow shifts to step B7, where OVSiz
It is determined whether e ≧ 0 or OVSize <0. If OVSize ≧ 0, the contents of the graphic header file can be changed, so the process proceeds to step B8. If OVSize <0, the control ends because the contents of the graphic header file cannot be changed.

Therefore, when OVSize ≧ 0, in order to correct the maximum allowable time L, at step B8, L ′ = LO
Calculate VSize / Trate. The maximum allowable time L ′ after the correction is calculated from the maximum allowable time L before the correction by using the code buffer 2.
4 is a value obtained by subtracting a value obtained by dividing the oversize of 4 by the transfer rate.

Thereafter, the flow shifts to step B9 to change the contents of the graphic header file. Here, DS
A. ATS of DS = DSA. By ATS + L 'of P,
A correction value of the time at which the first byte of the graphic stream of the page Bi relating to the sub information SIN2 is stored in the code buffer 24 is calculated, and the DSA. PTS of P = DS
A. P's PTS + L ', the correction value of the decoding start time of the graphic stream of the page Bi is calculated, and DSA. Duration of P = DSA. Duration of P
By -L ', a correction value of the display time of the page Bi by the graphic stream is calculated.

Thus, DSA. ATS, PT of P
A process of delaying S and Duration by a maximum of L seconds within a range where the code buffer 24 does not overflow can be performed. FIG. 15 described above shows an example of the contents of the graphic header file related to the sub-information SIN2 before correction, and FIG. 22 shows an example of the contents of the graphic header file after correction.

(5) Operation Example of Video Disc Recording / Reproducing Apparatus (Part 3) FIG. 27 is a time chart showing an operation example (part 3) of the video disc recording / reproducing apparatus 100. In this example,
During a certain display time, when random access is made to the superimposed sub-information, the content of the SYNC flag relating to the sub-information is checked, and editing processing is performed based on the check result. is there.

Regarding the sub-information SIN2 shown in FIG. 27, the logo "@xx" of the program creator, the program provider or the manufacturer is always displayed on the video image based on the main information for one hour on a television monitor (not shown). It is assumed that the message is displayed at the lower right of the screen. This logo "△△ xx"
With respect to, only the data for displaying the logo is described in the graphic header file in the first part of the graphic stream relating to page B1.

A video based on such main information is stored in an HDD.
(Hard Disk Drive) and other recording media such as a personal computer (P
C) When a random access is made to a point in the middle of the graphic stream relating to this page B1 from 41, the content of the SYNC flag is checked by the CPU 31, and when the SYNC flag = 0 is detected,
The page B1 is decoded, and from that time, the same graphics as before are displayed on the screen again.

Usually, such sub-information S having the same pattern
Even in the case of IN2, the same data has to be repeatedly embedded at certain intervals in preparation for outputting a video by playing back from the middle of the graphic stream for page B1. In this regard, according to the method of the present invention, if the time of a point to be reproduced from the middle of the graphic stream related to page B1 is known, the graphic header file of page B1 corresponding to the time is checked, and the SYNC flag of page B1 is checked. Is "0", it can be decoded and displayed together with the main information DIN.

(6) Example of Operation of Video Disc Recording and Reproducing Apparatus (Part 4) FIG. 28 is a time chart showing an example of operation of the video disc recording and reproducing apparatus 100 (part 4). In this example,
When the SYNC flag is added to the sub information SIN2, and when the sub information SIN2 is divided, the SYNC flag
The content of the flag is checked, and if it is detected from the content of the SYNC flag that the sub information SIN is not displayed in synchronization with the main information DIN, the sub information SIN before the division is obtained.
In which the image display period is divided arbitrarily.

Page B related to sub-information SIN2 shown in FIG.
When dividing one graphic stream into two,
The content of the SYNC flag added to the sub information SIN2 is CP
Checked by U31. This SYNC flag =
If 0, the graphic stream of page B1 is simply copied, and the ATS, PTS, Duration, etc. of the graphic header file of sub information SIN2 are rewritten. Thereby, the graphic stream of the page B1 related to the sub-information SIN2 is converted to the graphic header file related to the sub-information SIN21 in which ATS, PTS, Duration, etc. are rewritten, and to the sub-information SIN22, in which ATS, PTS, Duration, etc. are rewritten. It can be divided into graphic header files.

Accordingly, the sub-information SIN2 before the division can be used as it is as both the sub-information SIN21 and SIN22 after the division.

[0145]

As described above, according to the video reproducing / editing apparatus and the video editing method of the present invention, the display by the sub-information for attaching the editing point to the video by the main information before the editing point is set in advance. The sub-information before and after the edit point is joined based on the last point and the last time of the edit point and the display start point and the start time of the sub-information to be attached to the video of the main information after the edit point. Is what you edit.

With this configuration, when sub-information such as video material information is attached to a reproduced video based on the main information, even if an edit point is set in the middle of the display based on the sub-information, no troublesome processing is performed. It is possible to edit sub-information using video material information effectively in real time.

The present invention is extremely suitable for application to a video disc recording / reproducing apparatus which records and reproduces video / audio encoded information and combines sub-information such as captions and title pictures with main information.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a video reproduction / editing apparatus 10 according to an embodiment of the present invention.

FIGS. 2A to 2D are transition diagrams of data strings showing an example of editing sub information SIN1 and SIN2.

FIG. 3 is a flowchart illustrating a processing example according to a video editing method as an embodiment;

FIG. 4 is a block diagram illustrating a configuration example of a video disc recording / reproducing apparatus 100 as an embodiment of the present invention.

FIG. 5 is an image diagram showing an example of a directory structure related to sub-information on a medium.

FIG. 6 shows a single decoder 40 applied by the editing means 6;
FIG. 3 is a block diagram illustrating a configuration example of FIG.

FIG. 7 is a block diagram showing a configuration example of a double decoder 50 applied by the editing means 6;

FIGS. 8A and 8B are time charts showing an operation example of the single decoder 40 when an editing point is not set.

9A and 9B are single decoders 4 at the time of editing point setting according to an operation example (part 1) of the video disk recording / reproducing apparatus.
It is a time chart of 0.

FIG. 10 shows sub information SIN1 in a single decoder 40.
6 is a time chart showing an operation example at the time of switching from to the sub information SIN2.

FIG. 11 is a time chart showing an example of clearing the contents of a code buffer 24 at an edit point EP.

FIG. 12 shows sub information SIN1 to sub information SIN2 before the edit point.
6 is a time chart showing an example of switching a buffer input Din.

FIG. 13 is a time chart showing an example of clearing the contents of the code buffer 24 before the edit point.

FIG. 14 is a table showing an example of the contents of a graphics header file relating to sub-information SIN1.

FIG. 15 is a table showing an example of the contents of a graphics header file related to sub information SIN2.

FIG. 16 is a time chart showing an operation example of the code buffer 24 when the sub information SIN1 and SIN2 are input.

FIG. 17 is a time chart showing an operation example of the code buffer 24 when switching from the sub information SIN1 to the sub information SIN2.

18 is a time chart showing an operation example when switching from sub information SIN1 to sub information SIN2 by double decoder 50 shown in FIG. 7;

FIG. 19 is a time chart showing an operation example based on before the introduction of flag information in the video disc recording / reproducing apparatus 100 including the single decoder 40.

FIG. 20 is a time chart showing an operation example (No. 2) of the video disc recording / reproducing apparatus 100 after flag information is introduced.

FIG. 21 is a time chart showing an operation example of the video disc recording / reproducing apparatus 100 to which flag information is applied.

FIG. 22 is a table showing an example of contents of a graphics header file after a change relating to sub-information SIN2.

FIGS. 23A and 23B are time charts showing an operation example of the code buffer 24 when sub-information SIN1 and SIN2 'are input.

FIG. 24 is a time chart showing an operation example of the code buffer 24 when switching from the sub information SIN1 to the sub information SIN2 ′.

FIG. 25 is a time chart showing an example of input of a graphic stream before and after a change relating to sub information SIN2 to a code buffer 24.

FIG. 26 is a flowchart showing an example of processing for changing the graphic stream of page B according to the sub information SIN2 to the graphic stream of page B ′.

FIG. 27 is a time chart showing an operation example (part 3) of the video disk recording / reproducing apparatus 100.

FIG. 28 is a time chart showing an operation example (part 4) of the video disk recording / reproducing apparatus 100.

[Explanation of symbols]

1 ... first setting means, 2 ... second setting means, 3
... 3rd setting means, 4 ... control means, 5 ... storage means, 6 ... editing means, 10 ... video reproduction and editing apparatus, 21 ... video decoder, 22 ... Adder, 2
3 ... cache memory, 19, 24 ... code buffer, 25 ... graphic decoder, 27 ...
System controller, 33 ... RAM (storage means), 34 ... input section (first to third setting means), 4
0: Single decoder, 50: Double decoder, 100: Video disk recording / reproducing device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C023 AA18 AA21 BA01 BA16 CA01 CA05 CA08 DA03 DA08 EA03 5C053 FA14 FA21 FA24 GB12 GB37 HA29 JA16 JA22 KA05 KA24 LA11 5D110 BB20 CA05 CA07 CA09 CA18 CA46 CA48 CB04 CD16 CF13 CJ13C

Claims (10)

[Claims] 1. A video reproducing / editing apparatus which reproduces main information relating to video and audio and edits two or more sub-information which is video material information to be attached to the main information. First setting means for setting an edit point; and second setting means for setting a final point and a final time of display by the first sub-information for attaching the video to the main information before the edit point. A third setting unit for setting a display start point and a start time of the display by the second sub-information to be attached to the video by the main information after the edit point; and The first point and the last time before and after the edit point are based on the last point and the last time of the first sub-information and the start point and the start time of the second sub-information set by the third setting means. To join the second sub-information Video reproducing editing apparatus characterized by comprising an editing means for editing. 2. The information relating to the editing point, the information relating to the final point and the final time of the display by the first sub-information, and the information relating to the starting point and the starting time of the display by the second sub-information. 2. The video reproducing / editing apparatus according to claim 1, further comprising storage means for storing information. 3. An information adding means for adding flag information to the sub information, wherein the flag information indicates whether or not the sub information is a content to be displayed in synchronization with the main information. The video reproducing / editing apparatus according to claim 1, wherein: 4. A case in which flag information is added to the sub information, wherein the content of the flag information is detected, and a display based on the sub information is superimposed on a video based on the main information based on the content of the flag information. 2. The video reproducing / editing apparatus according to claim 1, further comprising control means for controlling said editing means. 5. A method for editing two or more sub-information, which is video material information to be attached to main information relating to video and audio, wherein at least an editing point is set in the sub-information, The last point and the final time of the display by the first sub-information to be attached to the video by the main information before the second point are set, and the second sub-point to be attached to the video by the main information after the edit point is set. A start point and a start time of the display by the information are set, and based on the end point and the end time of the first sub-information and the start point and the start time of the display according to the second sub-information A video editing method comprising joining first and second pieces of sub-information before and after the editing point. 6. A video editing system based on the previously encoded sub-information, wherein a decoding end address indicating a decoding end position is set for an end point of display based on the first sub-information. A presentation end time indicating a display output end time is set with respect to a last time of display according to the first sub information, and a decode indicating a decoding start position is set with respect to a start point of display according to the second sub information The video editing method according to claim 5, wherein a start address is set, and a presentation start time indicating a display output start time is set with respect to a display start time according to the second sub information. 7. The video editing method according to claim 5, wherein priority is given to decoding of either the first or second sub-information before the editing point. 8. The apparatus according to claim 1, wherein flag information is added to the sub-information, and the flag information indicates whether the sub-information is to be displayed in synchronization with the main information. 5. The video editing method according to 5. 9. When flag information is added to the sub-information, and when an edit point is set in the middle of display by the sub-information, the content of the flag information is detected, When it is detected from the information that the sub information is not displayed in synchronization with the main information, the sub information is decoded at the editing point so that the display of the sub information is superimposed on the video of the main information. 6. The video editing method according to claim 5, wherein the editing is performed. 10. When the flag information is added to the sub information, when the sub information is divided, the content of the flag information is detected, and the sub information is synchronized with the main information from the flag information. 6. The video editing method according to claim 5, wherein when it is detected that the content is not the content to be displayed, the video display period based on the sub-information before the division is arbitrarily divided.