WO2007029373A1

WO2007029373A1 - Data processing method, data processing apparatus, computer program, and recording medium

Info

Publication number: WO2007029373A1
Application number: PCT/JP2006/308036
Authority: WO
Inventors: Takahiro Nakamura; Hiroshi Ikeda
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2005-09-09
Filing date: 2006-04-17
Publication date: 2007-03-15
Also published as: JP4566097B2; JP2007081470A; TW200710830A

Abstract

There is provided a data processing method capable of combining a plurality of digital data into a set of digital data, performing a smooth reproducing process, effectively utilizing a medium capacity. A CPU (21) reads a plurality of digital data to be combined and stores the read digital data into a storage (25). The CPU (21) extracts the reproduction time of each of the digital data stored in the storage (25). Subsequently, the CPU (21) performs processing for adding, according to the order of combination, the extracted reproduction times to the time information of each of the data divided within the digital data.

Description

Specification

Data processing method, data processing apparatus, computer program, and recording medium

[0001] The present invention relates to a data processing method for combining a plurality of digital data having time information for each divided data, a data processing device, a computer program for causing a computer to realize the functions of the data processing device, and a recording medium. About.

Background art

[0002] For DVD (Digital Versatile Disc) or Digital Satellite Broadcasting !, MPEG (Moving Picture coding Experts Group) 2 standard video and audio data were encoded and encoded. These data and additional data are multiplexed and recorded or transmitted as a program stream (PS) data format or a transport stream (TS) data format. The multiplexed data is reproduced while being synchronized (for example, Patent Document 1).

[0003] In recent years, DVD players equipped with a hard disk are becoming popular, and users can store a large number of videos, television programs, and other personally photographed videos on the DVD or the hard disk. The video data stored in the hard disk can be edited. For example, a plurality of video data can be edited as a single video data so that it can be viewed continuously.

In this editing process, the playback order is determined for a plurality of video data, and when the playback of one video data is completed, the next video data is read and played back. In other words, by repetitively reproducing a plurality of video data, the reproduction is performed as if the plurality of video data are constituted as one video data.

Patent Document 1: JP 2004-310963 A

Disclosure of the invention

Problems to be solved by the invention

However, in the conventional video data combining process, there is a problem that there is a time lag from the end of playback of one video data to the start of playback of the next video data. This tag Due to the presence of the image lag, there was a problem that the video data was not reproduced smoothly between the video data.

[0006] In the conventional combining process, a plurality of pieces of video data are not combined into one piece of video data, and are still stored as a plurality of pieces of video data in a DVD or a hard disk. The maximum number of data that can be stored is specified for DVDs or hard disks, and the number of video data is not combined in the conventional combining process and continues to increase. The problem arises that it has reached and can no longer be recorded.

[0007] The present invention has been made in view of such circumstances, and an object of the present invention is to change the time information of each piece of data divided into digital data according to the combination order and the reproduction time of each piece of digital data. By combining multiple digital data into one digital data, smooth playback processing is possible, and the data processing method, data processing device, and data processing device that can effectively use the media capacity can be used. The object is to provide a computer program and a recording medium for causing a computer to realize the function.

Means for solving the problem

[0008] A data processing method according to the present invention stores a plurality of digital data to be combined in a data processing method in which a plurality of digital data having time information for each divided data is combined by a processing unit. The extraction step of extracting the reproduction time of each digital data by the processing unit, and the time information of each piece of data divided in the digital data according to the order of combination. An addition step of adding the reproduced time by the processing unit, and a step of reproducing the combined digital data based on the time information of each data after the addition.

[0009] In the data processing method according to the present invention, the adding step stores the digital data in association with the combination order and the reproduction time extracted by the extracting step in a storage unit, and the digital data to be added In contrast, the processing unit calculates the total reproduction time of the digital data to be combined in advance, and the calculated total reproduction is included in the time information of each divided data in the addition target digital data. And adding the time by the processing unit. [0010] The data processing method according to the present invention further includes a step of storing a plurality of digital data having the time information added in the adding step as one digital data in a storage unit.

[0011] A data processing device according to the present invention stores a plurality of combined digital data in a storage unit in a data processing device that combines a plurality of digital data having time information for each divided data by a processing unit. Means for extracting the reproduction time of each digital data by the processing unit, and processing the extracted reproduction time into the time information of each data divided in the digital data according to the order of combination. Addition means for adding by the unit, and means for reproducing the combined digital data based on the time information of each data after addition.

[0012] In the data processing device according to the present invention, the adding means stores the digital data in association with the combining order and the reproduction time extracted by the extracting means in the storage unit, and the digital data to be added In contrast, the processing unit calculates the total reproduction time of the digital data to be combined in advance, and the calculated total reproduction time is included in the time information of each divided data in the addition target digital data. Means for adding by the processing unit.

[0013] The data processing apparatus according to the present invention further includes means for storing a plurality of digital data having time information added by the adding means in the storage unit as one digital data.

[0014] A computer program according to the present invention includes a plurality of digital data coupled to a computer in a computer program that couples a plurality of digital data having time information for each divided data to a processing unit of the computer. According to the step of reading out the data from the storage unit, the extraction step of extracting the reproduction time of each digital data by the processing unit, and the time information of each data divided in the digital data according to the combination order, An addition step of adding the extracted reproduction time by the processing unit, and a step of storing a plurality of digital data having time information added by the addition step in the storage unit as one digital data It is characterized by.

[0015] In the computer program according to the present invention, the adding step is performed on a computer. Storing the digital data and the reproduction time extracted by the extraction step in the storage unit in association with the matching order, and the total reproduction time of the digital data combined in advance with respect to the digital data to be added A step of calculating by the processing unit; and a step of adding the calculated total reproduction time by the processing unit to the time information of each divided data in the addition target digital data. .

[0016] A recording medium according to the present invention is a recording medium that can be read by a computer that records a computer program that combines a plurality of digital data having time information for each divided data with a processing unit of the computer. The computer reads a plurality of digital data to be combined from the storage unit, an extraction step for extracting the reproduction time of each digital data by the processing unit, and the digital data in accordance with the combination order. An adding step for adding the extracted reproduction time by the processing unit to the time information of each data divided in step (a), and storing a plurality of digital data having the time information added by the adding step as one digital data The step of memorizing is performed.

[0017] In the recording medium according to the present invention, the adding step stores in the storage unit the digital data and the reproduction time extracted by the extracting step in association with a computer in the order of combination, The step of calculating the total reproduction time of the digital data to be combined in advance with respect to the data by the processing unit, and the calculated total reproduction in the time information of each divided data in the addition target digital data And adding the time by the processing unit.

In the present invention, the processing unit captures a plurality of digital data to be combined, and stores the captured plurality of digital data in the storage unit. The processing unit extracts the reproduction time of each digital data stored in the storage unit. Next, the processing unit executes a process of adding the extracted reproduction time to the time information of each piece of data divided in the digital data according to the combination order. Specifically, the processing unit stores the digital data and the reproduction time of each extracted digital data in the storage unit in association with the combination order desired to be reproduced. The processing unit then converts the digital data to be added in advance to the digital data to be added. The total reproduction time of the tall data is calculated with reference to the reproduction time stored in the storage unit. Then, the processing unit performs a process of adding the calculated total reproduction time to the time information of each divided data in the addition target digital data.

[0019] In this way, each digital data on which the time information has been added is stored as one digital data in the storage unit. When the processing unit receives a playback instruction from the viewer, the processing unit performs a process of playing back the combined digital data based on the time information of each data after the addition. The time information power of each divided data is processed by the processing unit so that it is continuous between each digital data, so that a smooth image can be provided to the viewer without being aware of the joint between each digital data. Is possible.

[0020] In addition, since a plurality of digital data are combined and stored as one digital data in the storage unit, the number of data stored in the storage unit can be reduced, and the capacity can be effectively utilized. Become.

The invention's effect

[0021] Since playback of a plurality of digital data is processed and played back so that the time information of each divided data is continuous, a smooth video is provided to the viewer without being conscious of the joint between each digital data. It becomes possible.

[0022] In addition, since a plurality of digital data are combined and stored as one digital data in the storage unit, the number of data stored in the storage unit can be reduced, and the media capacity can be effectively utilized. The present invention has excellent effects.

Brief Description of Drawings

FIG. 1 is a block diagram showing a hardware configuration of a data processing device according to the present invention.

FIG. 2 is an explanatory diagram showing a data structure of a program stream.

FIG. 3 is an explanatory diagram showing a record layout of a data file.

FIG. 4 is a schematic explanatory view showing the principle of addition processing according to the present invention.

FIG. 5 is a schematic explanatory view showing the principle of addition processing according to the present invention.

FIG. 6 is a flowchart showing a procedure of a combining process according to the present invention.

FIG. 7 is a block diagram showing a configuration of a data processing device according to a second embodiment.

Explanation of symbols [0024] 1 Data processing device (recording / playback device, personal computer)

2 Processing unit

3 Playback unit

4 Recording media

21 Processing unit (CPU)

25 Memory unit

41 Portable recording media

251 Control program

252 data files

BEST MODE FOR CARRYING OUT THE INVENTION

[0025] Embodiment 1

FIG. 1 is a block diagram showing a hardware configuration of a data processing apparatus according to the present invention. A data processing apparatus 1 includes a processing unit 2 that performs processing such as data combination and a playback unit 3 that performs data playback. As the data processing device 1, a recording / playback device in which a DVD player and a hard disk are integrated, a device for recording / playback data received by satellite or cable power, a computer having a DVD reader Z writer or a TV tuner, or the like is used. Hereinafter, the data processing apparatus 1 will be described as being a recording / reproducing apparatus 1 that records and reproduces video data and audio data according to the MPEG-2 standard.

[0026] Similar to the MPEG-1 system, the MPEG-2 system multiplexes individual streams such as an arbitrary number of encoded video data, audio data, and additional data, and reproduces them in synchronization with each other. A method for prescribing. In the MPEG-2 system, two types of methods are defined to support a wider range of applications including MPEG-1. One is a program stream (PS), and only one program is configured in one stream as in MPEG-1. The other is a transport stream (TS), which can be used for broadcasting because multiple programs can be configured in a single stream. The case where the program stream method is applied is described below. FIG. 2 is an explanatory diagram showing the data structure of the program stream. The program stream has a similar structure to the MPEG-1 stream, and is composed of a collection of packs. A packet constituting the knock is called a PES (Packetized Elementary Stream) packet, and a PES packet header is added to a divided stream of video data and audio data.

[0028] The PES packet header includes a code for identifying individual streams (stream jd), the packet size, and PTS (Presentation Time Stamp) 3i7. This is for i3TS (Decoding Time Stamp). Describes time information, other control information, etc. (whether scrambled, copyrighted, CRC (Cyclic Redundancy Check), etc.) This PES packet structure is also used in the transport stream, Mutual type conversion between program stream and transport stream is possible.

[0029] A pack header is added to the head of each pack, and reference time information called SCR (System Clock Reference), a multiplexing bit rate (mux_rate), and the like are described following the pack start code. The recording / playback apparatus 1 can process the time information for each divided data, such as the SCR included in each pack, the PTS and DTS included in each packet.

The playback unit 3 in FIG. 1 includes a demultiplexer 32, a system controller 31, an STC (System Time Clock) 33, a video buffer 34, an audio buffer 35, a video decoder 36, and an audio decoder 37. The system controller 31 controls each hardware in the playback unit 3 according to the program stored therein. The program stream input to the playback unit 3 is divided into video data and audio data by the demultiplexer 32.

The divided video data is stored in the video buffer 34, and the divided audio data is stored in the audio buffer 35. STC33 for synchronous playback of video data and audio data has a defined reference time and its frequency is 27 MHz. The SCR in the pack header is expressed with an accuracy of 27 MHz, similar to STC33, and is referenced to reproduce the reference time when encoded in STC33.

[0032] Each of video data and audio data has a unit of decoding 'reproduction called an access unit. Each unit is decoded at any reference time and reproduced at any time. These time stamps are described in the PTS and DTS of the PES packet header. The PTS is output from the decoder when the STC33 and the PTS match when the access unit is played back. That is, when the STC 33 and the PTS are synchronized, the system controller 31 reads the video data describing the PTS from the video buffer 34 and outputs it from the video decoder 36. Further, when the STC 33 and the PTS are synchronized, the system controller 31 reads the audio data in which the PTS is described from the audio notifier 35 and outputs it from the audio decoder 37.

[0033] A stream encoded with MPEG-2 video may have a different decoding order and playback order. In this case, a DTS indicating the decoding time is added to the PTS. Similarly, when the DTS is added, the system controller 31 performs the decoding process by synchronizing the STC 33 and the DTS. By controlling the time information including the SCR, PTS, and DTS and the STC 33 by the system controller 31, the video data and the audio data are synchronously reproduced.

The processing unit 2 includes a CPU (Central Processing Unit) 21, a RAM (Random Access Memory) 22, an input unit 23, a reader Z writer 24, a tuner 26, and a storage unit 25 as processing units. . The CPU 21 is connected to each part of the hardware of the processing unit 2 via the bus 27, controls them, and executes various software functions in accordance with a control program 2 51 stored in the storage unit 25. The control program 251 is written in a programming language such as C language.

[0035] The storage unit 25 is composed of, for example, a node disk, and stores therein the above-described control program 251 and a data file 252 for storing data such as movies. The input unit 23 receives processing such as playback, recording, and editing from the viewer. The signal input from the input unit 23 is output to the CPU 21. The reader Z writer 24 reads and writes data recorded on the recording media 4 and 4 such as a DVD. The tuner 26 receives digital data such as TV broadcasts and movies distributed via satellite or cable. In the following description, it is assumed that the digital data to be combined is movie data.

[0036] Movie data stored in the recording medium 4 is read by the reader Z writer 24, and the CP U21 stores the read movie data in the data file 252 of the storage unit 25. The movie data received from the tuner 26 is also stored in the data file 252 in the same manner. In this way, a plurality of movie data is stored in the data file 252. The CPU 21 performs a combination process described later, and outputs the combined movie data to the playback unit 3.

FIG. 3 is an explanatory diagram showing a record layout of the data file 252. The data file 252 includes a join order field, a data name field, a playback time field, and a total playback time field. A plurality of movie data stored in the data file 252 has a playback order, that is, a joining order, defined by an instruction from the input unit 23 of the viewer. In the combination order field, the order in which the viewer desires to view is stored, and in correspondence with this, movie data is sequentially stored in the data name field.

In the example of FIG. 3, movie data 1, movie data 2, movie data 3, movie data 4, and movie data 5 are stored, and movie data 3 → movie according to the desired combination order. Each movie data is stored in the data name field in the order of data 2 → movie data 1 → movie data 5 → movie data 4 in this order. The playback time field stores the playback time of each movie data. For example, movie data 3 has a playback time of 35 minutes and 20 seconds. In order to simplify the explanation, the units of less than a second are displayed.

[0039] In the total playback time field, the total playback time to be added to the time information of each movie data (in this embodiment, SCR in the pack header, and PTS and DTS in the PES packet). (Addition time) is stored. That is, the total playback time to be added is stored for all the SCR, PTS and DTS in the pack or packet data divided in the movie data. For example, movie data 1 has 45 minutes and 30 seconds added to each SCR, PTS and DTS.

[0040] The CPU 21 performs the calculation of the total reproduction time. The CPU 21 calculates the total playback time of the movie data to be combined in advance with respect to the movie data to be added, that is, the movie data to be combined before in the time series. For example, if the movie data to be added is movie data 1, the movie data to be combined before in the time series is Movie data 3 and movie data 2, and the total playback time is 45 minutes and 30 seconds, which is 35 minutes and 20 seconds plus 10 minutes and 10 seconds. On the other hand, when there is no movie data to be combined before in time series like movie data 3, the total playback time to be added is zero.

4 and 5 are schematic explanatory diagrams showing the principle of the addition processing according to the present invention. The vertical axes in Figs. 4 and 5 are time stamps such as PTS and DTS, and the horizontal axis is the position of the access unit corresponding to the time stamp. Each graph in Figs. 4 (a) to (e) shows a time stamp corresponding to a predetermined access unit. For example, movie data

3, the time stamp of the first access unit is 0, and the time stamp of the last access unit is the playback time of 35 minutes 20 seconds. FIG. 4 shows the relationship between the time stamp and the access unit position for each of the movie data 1 to 5.

FIG. 5 shows a state in which the total playback time is added to the time stamp of each movie data. Since movie data 3 has a total playback time of 0, no addition processing is performed. The next combined movie data 2 has a total playback time of 35 minutes and 20 seconds, so 35 minutes and 20 seconds are added to all time stamps such as SCR, PTS, and DTS. Compared to (indicated by dotted lines), shelves are generally shelved. For movie data 1, the total playback time is 45 minutes and 30 seconds, and similarly 45 minutes and 30 seconds are shelved as a whole. In this way, the time stamp is completely combined in the movie data after the addition process. The combined movie data is stored in the data file 252 in the storage unit 25 as one movie data, and the movie data 1 to 5 before the combination are deleted.

Hereinafter, the combining process according to the present invention will be described with reference to flowcharts. FIG. 6 is a flowchart showing the procedure of the combining process according to the present invention. The CPU 21 temporarily stores a plurality of movie data fetched from the reader / writer 24 or the tuner 26 in the data file 252 of the storage unit 25 (step S61). Next, the CPU 21 refers to the time information in the movie data, extracts the playback time (step S62), and stores the playback time in the storage unit 25 corresponding to each movie data.

[0044] The user inputs the input unit 23 or the order in which the remote controller force coupling is desired, that is, the reproduction order, not shown. Information related to the join order is received by the input unit 23. (Step S63) and output to the CPU 21. The CPU 21 rearranges the order of the movie data temporarily stored in the data file 252 based on the powerful information. That is, the CPU 21 stores the movie data and the reproduction time in the data file 252 as shown in FIG. 3 in association with the combination order (step S64).

The CPU 21 calculates the total playback time of the movie data that is combined before in the time series with respect to the movie data to be added (step S65). This total playback time is obtained by adding the playback time of the movie data that is previously combined in the time series by the CPU 21. Then, the CPU 21 performs a process of adding the calculated total playback time to the time information of the movie data to be added (step S66). Specifically, the total playback time is added to the time information including all SCR, PTS, and DTS in the movie data stream to be added. The CPU 21 combines the plurality of movie data after the addition into one movie data, and stores the combined movie data in the data file 252 (step S67).

Finally, the CPU 21 performs a process of deleting a plurality of movie data before combination from the data file 252 (step S68). When receiving the playback instruction of the combined movie data from the input unit 23, the CPU 21 reads the movie data from the data file 252 and outputs it to the playback unit 3. The playback unit 3 plays back the movie data whose time information has been changed by the method described above (step S69).

In the present embodiment, the same effect can be obtained by performing addition processing on time information such as PCR (Program Clock Reference) in the same manner for the force transport stream described for the program stream. it can. Furthermore, in the present embodiment, digital data including time data for each of the force-divided data described by taking digital data including video data and audio data according to the MPEG-2 standard as an example. It is needless to say that the present invention is not limited to this, and can be applied in the same manner to, for example, digital data that can be used only for audio data. Further, in the present embodiment, the power to form a movie data obtained by combining a plurality of movie data on a hard disk, and to play the combined movie data on a DVD can be reproduced. Of course it is good. [0048] Embodiment 2

FIG. 7 is a block diagram showing a configuration of the data processing device 1 according to the second embodiment. For example, a personal computer may be used as the data processing apparatus 1 according to the second embodiment. In the following description, it is assumed that the data processing device 1 is a personal computer 1. The processing unit 2 of the personal computer 1 further includes a communication unit 28 such as a modem or a LAN (Local Area Network) card, and is connected to a network N such as the Internet.

A computer program for operating the personal computer 1 can also be provided on a portable recording medium 41 such as a CD-ROM, MO, or DVD-ROM as in the second embodiment. Furthermore, it is also possible to download a computer program that is not shown in the figure through the communication network N. The contents are explained below.

[0050] A computer program that allows the reader Z writer 24 of the personal computer 1 shown in FIG. 7 to read digital data, extract the reproduction time, add the reproduction time, and store it as one digital data is recorded. A portable recording medium 41 (CD-ROM, MO, DVD-ROM, etc.) is inserted, and this program is installed in the control program 251 of the storage unit 25. Alternatively, the earned program may be downloaded to the storage unit 15 by downloading V and server computer power not shown outside via the communication unit 28. The powerful program is loaded into the RAM 22 and executed. This functions as the personal computer 1 of the present invention as described above.

[0051] Since the second embodiment is configured as described above, and the other configurations and operations are the same as those of the first embodiment, the corresponding parts are denoted by the same reference numerals and detailed description thereof will be given. Is omitted.

Claims

The scope of the claims

[1] A data processing method that combines multiple digital data with time information for each divided data by the processing unit!

Storing a plurality of digital data to be combined in a storage unit;

An extraction step for extracting the reproduction time of each digital data by the processing unit, and adding the extracted reproduction time to the time information of each data divided in the digital data by the processing unit according to the combination order Adding step;

A step for reproducing the combined digital data based on the time information of each data after addition, and

A data processing method comprising:

[2] The adding step includes

Storing the digital data in association with the order of combination and the reproduction time extracted by the extraction step in a storage unit;

Calculating a total reproduction time of digital data to be combined in advance with respect to digital data to be added by the processing unit;

Adding the calculated total reproduction time by the processing unit to time information of each divided data in the addition target digital data;

The data processing method according to claim 1, further comprising:

[3] A step of storing a plurality of digital data having time information added in the adding step in the storage unit as one digital data

The data processing method according to claim 1, further comprising:

[4] In a data processing apparatus for combining and processing a plurality of digital data having time information for each divided data by a processing unit,

Means for storing a plurality of digital data to be combined in a storage unit;

Extracting means for extracting the reproduction time of each digital data by the processing unit, and adding the extracted reproduction time by the processing unit to the time information of each data divided in the digital data according to the order of combination Adding means;

Based on the time information of each data after addition, the combined digital data is reproduced. Means and

A data processing apparatus comprising:

[5] The adding means includes:

Means for storing in the storage unit the digital data and the reproduction time extracted by the extraction means in association with the order of combination;

Means for calculating the total reproduction time of the digital data combined in advance with respect to the digital data to be added by the processing unit;

Means for adding, by the processing unit, the calculated total reproduction time to time information of each divided data in the addition target digital data;

The data processing apparatus according to claim 4, comprising:

[6] Means for storing a plurality of digital data having time information added by the adding means in the storage unit as one digital data

The data processing apparatus according to claim 4, further comprising:

[7] In a computer program for combining a plurality of digital data having time information for each divided data with a processing unit of a computer,

On the computer,

Reading a plurality of digital data to be combined into a storage unit; and

Storing a plurality of digital data having time information added in the adding step in the storage unit as one digital data;

A computer program for running.

[8] The adding step includes

On the computer,

Total digital data to be combined in advance with respect to the digital data to be added Calculating a lifetime by the processing unit;

The computer program according to claim 7, wherein the computer program is executed.

[9] In a computer-readable recording medium recording a computer program for combining a plurality of digital data having time information for each divided data with a processing unit of the computer,

On the computer,

Reading a plurality of digital data to be combined into a storage unit; and

A recording medium on which a computer program for executing the program is recorded.

[10] The adding step includes

On the computer,

10. The recording medium according to claim 9, wherein a computer program for executing the program is recorded.