JP2007274562A - Motion picture data transfer method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To execute transfer processing while reducing a processing load for a recording and reproducing device when transferring a recorded moving image from the recording and reproducing device which has recorded a digital broadcast program, to a mobile terminal. <P>SOLUTION: When a received TS packet enters a broadcast stream as shown in 201, a header 203 is added to a recorder that is a fixed terminal, for each of packets of a fixed number (for each unit time) as shown in 202, the packet is packed together with a time of arrival, and only a packet related to a selected program is stored on a recording medium such as an HDD. Furthermore, when used for a mobile terminal, only one-segment broadcast data are further selected and recorded on a memory card or the like as shown in 204. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus for recording / reproducing a moving image, and more particularly to a moving image data transfer method for recording a digital broadcast in a recording / reproducing apparatus and transferring the recorded moving image to another portable terminal.

Conventionally, there is a recording apparatus for recording a digital broadcast. Such a recording apparatus is usually a stationary recording apparatus in a home. When a recorded broadcast program is viewed, the recording apparatus is generally viewed near the place where the recording / reproducing apparatus is installed. However, recently, there has been realized a usage form in which a recorded program is downloaded to a mobile phone or the recorded program is transferred with a memory card and viewed on the go.
JP 2003-230089 (FIG. 1)

  However, when a broadcast program that has been recorded once is transferred to a mobile phone or the like as in the prior art described above, a process for converting recorded data for the mobile phone is required. Specifically, by reducing the amount of data that can be viewed on a relatively small display screen of a mobile phone and transferring the data, the recording capacity and playback processing amount on the mobile phone side are reduced. However, such a data amount reduction process has a very large processing amount, and places a heavy load on the recording / reproducing apparatus.

  Accordingly, the present invention provides a moving image transfer method in a recording / reproducing apparatus that realizes a recording data transfer process suitable for a portable terminal in a form that suppresses the load on the recording / reproducing apparatus as much as possible in order to solve the above-described problems. It is intended.

In order to solve the above-described problems, the present invention provides a transfer method for transferring moving image data recorded in another mobile terminal in a digital broadcast recording / playback apparatus.
It is determined whether or not a simple video is included in the recorded stream, and if it is determined that a simple video is included as a result of the determination, only the packets necessary for playing the simple video are transferred to the portable terminal. However, when it is determined that the simple moving image is not included, the data is re-encoded and transferred for the portable terminal.

The present invention also uses a recording medium as a storage unit for the portable terminal.

In the present invention, the presence or absence of the simple moving image is determined by referring to the simple moving image flag data included in the broadcast data.

  The present invention also determines whether or not to re-encode based on identification information indicating that there is a simple moving image included in the broadcast data of the digital broadcast.

  When transferring recorded moving image data from a recording / playback apparatus that records a digital broadcast program to a mobile terminal, the transfer processing can be executed while reducing the processing load on the recording / playback apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The present embodiment described below relates to a recording apparatus that records a broadcast program transmitted by digital TV broadcast or broadcast using the Internet. The system configuration of the recording apparatus of the present embodiment is as described in, for example, Japanese Patent Application Laid-Open No. 2004-303324, which has existed in the past, and the description thereof is omitted.

First, the transmission format of digital TV broadcasting handled in this embodiment will be briefly described.

In a method for broadcasting (distributing) compressed moving images such as digital TV broadcasts and broadcasts using wired lines such as the Internet, the MPEG-TS method, which is a common basic format, uses a management data portion and a payload of a packet. Divided.

  The payload includes data to be reproduced in a scrambled state. According to ARIB, PAT (Program Association Table), PMT (Program Map Table), and SI (Service Information) are not scrambled. In addition, various management information is created using PMT and SI (Service Description Table, EIT: Event Information Table, BAT: Bouquet association Table).

  As playback targets, MPEG video data, Dolby AC3 audio data, MPEG audio data, data broadcasting data, and the like, and information directly related to the playback target, such as PAT, PMT, and SI, which are necessary for playback ( Program information).

  The PAT includes a PID (Packet Identification) of the PMT for each program, and further, PIDs of video data and audio data are recorded in the PMT.

  Thus, as a normal playback procedure using a recording / playback apparatus such as an HDD-DVD recorder, when a user determines a program based on EPG information, the PAT is read at the start time of the target program, and the data is used as a basis. The PID of the PMT belonging to the desired program is determined, the target PMT is read according to the PID, the PID of the video and audio packet to be reproduced included therein is determined, and the video and audio of the video and audio are determined by the PMT and SI. The attribute is read out and set in each decoder, and the video and audio data are cut out according to the PID and reproduced. Here, since PAT, PMT, SI, and the like are also used for channel switching (so that an image appears immediately after switching the channel), they are transmitted every several 100 ms.

  However, so-called One Seg (One Seg (trademark)) broadcasting is currently being carried out for broadcasting for mobile objects. Here, there is no PAT, and only the NIT (Network Information Table) and the PMT, the PMT is determined in advance by the service number described in the NIT, and the PMT is determined according to this service number.

  Furthermore, when this digital broadcast is transmitted from a tuner to a recording / playback device such as an HDD-DVD recorder for recording, only the object data of the target program is selected and recorded. This format is called partial TS.

In this case, PAT and PMT are re-edited according to the target program, and SIT (Selection Information Table) and DIT (Discontinuity information Table) are added. The SIT is created based on information such as EIT in the broadcast, and is inserted at the same timing as the EIT. The DIT is inserted at a location where the bit stream is discontinuous. The DIT is inserted as a set of 2TS packets. Thereby, it is determined whether the content is discontinuous.

  Furthermore, the one-segment broadcasting used for mobile terminals is merged with the main broadcast and broadcasted here, and simple video (H264 AVC) and AAC LC are the target data.

In addition, the current HDD-DVD recorder is equipped with a large-capacity recording medium such as a hard disk drive or a DVD disk, and can record a digital broadcast having the above-described data structure as it is. Therefore, when recording on a high-speed disk medium such as an HDD-DVD recorder, it is advantageous to record the broadcast data as it is (select only data belonging to a necessary program: partial TS) and record it as digital data. .

Therefore, unlike the conventional VR (video recording) format, ESR (extended stream recording) is merged with VR as a format for recording a stream as it is, and it becomes a standard corresponding to digital broadcasting while utilizing the VR assets. .

The DVD disc is composed of a volume / file structure information area in which a file system is stored in the data in the disc, and a data area for actually recording the data file.

  The file system includes information indicating which file is recorded where. The data area is divided into a general computer recording area and an AV data recording area. The AV data recording area includes an AV data management information area in which a VMG file for managing AV data is stored, a VR object group recording area in which an object data (VOBS) file (VRO file) of a video recording standard is recorded, and digital broadcasting. This is composed of a Stream object group recording area in which objects corresponding to (SOBS: Stream object set) are recorded.

Here, DVD-Video (ROM Video) is divided into VIDEO-TS and DVD-VR (recording / playback DVD) is divided into DVD-RTAV and a directory for each format. The DVD for digital broadcasting used in this embodiment is used. The standard is also recorded in a directory called a recorded video directory, for example.

That is, as shown in FIG. 1, a video management information file 102 is placed in a directory 101 called a recording video directory, a video object file 104 is placed in a self-video management directory 103 thereunder, and a stream is stored in the digital broadcast management directory 105. It consists of an object file 106 and a stream object management file 107.

  Here, it is conceivable that the stream management information is in the video management information file 102 or is prepared as a separate file in the digital broadcast management directory 105. Further, the playback order is determined by the playback order information 110.

Furthermore, when a flag indicating whether or not there is a simple moving image is provided in the EX_SOB general information 109 in the stream attribute information 108 for processing, and there is no simple moving image by examining the PMT_PID in the EX_SOB general information. If you want to.

In addition, as shown in FIG. 2, when TS packets are input in the broadcast stream as in the uppermost stage 201 as shown in FIG. 2, the recorder that is a fixed terminal has a fixed number of packets (per unit time) in the middle stage 202. B) A header 203 is attached, packets are packed together with arrival time, and only packets related to the selected program are stored in the medium. Further, when used for a portable terminal, only one-segment broadcasting data is further selected and recorded as in the lowermost stage 204.

As shown in FIG. 3, the data transfer to the portable terminal is performed by directly connecting the portable terminal and downloading it to a memory (HDD) in the portable terminal, or by using an SD card (memory card), USB memory, HDD, or the like. It is conceivable that the data is stored in a medium and the medium is connected to a portable terminal and played back.

  Next, in the editing process, the program menu display process is as shown in FIGS. 4 and 5 in accordance with a user instruction (input of a remote control key).

First, when editing processing is started, video management information is read and developed into a work (step S401). Then, based on the playback order information, the EX_PG information is set to display a thumbnail for each CLIP, and the coordinates of the thumbnail are set (step S402).

Next, the CLIP thumbnail is displayed at the target coordinates, and it is further determined whether there is a simple movie (determined by whether the simple movie flag or PMT_PID has a value in the range of 0x1fc8-f). A message is displayed (step S403).

Then, it is determined whether there is another CLIP. If there is another CLIP (Y in step S404), the process proceeds to step S405.

In step S405, when the CLIP is the fourth sheet, the display position is lowered by one step. If it is within the sixth frame, the display position is shifted one step to the right, and the process proceeds to the next CLIP (step S406), and the process proceeds to step S403.

After repeating this process, when the display of the sixth CLIP is completed, that is, in the case of the seventh (Y in step S407), a page feed symbol is displayed (step S409).

Then, the user waits for a selection input for selecting a specific CLIP image (step S410). In the case of page turning (Y in step S412), the process proceeds to the next CLIP, clears the display, and sets the display position to the initial value. Return to step S403. On the other hand, when the user selects a CLIP image (N in step S411), the reproduction start time, CLIP number, and EX_PG number of the selected image are read (step S413), and the reproduction process is executed (step S414).

  Next, a detection operation for detecting whether or not a simple moving image is included will be described with reference to FIG. As shown in FIG. 6, the process of detecting whether or not the video is a simple video and setting a simple video flag checks the broadcast stream (step S601) and checks the value in the NIT (step S602). Specifically, it is determined whether there is a service type of 0x0c in NIT (or whether PMT_PID has a value in the range of 0x1fc8-f) (step S603). (Y in step S603) 1 is set in the simple moving image flag (step S604), and if there is not (N in step S603), the simple moving image flag in the management information is set to 0 (step S605).

    Next, a process for copying moving image data to a mobile terminal will be described with reference to FIG.

  In order to copy moving image data from a fixed terminal such as an HDD-DVD player to a portable terminal, first, video management information is read (step S701), and a user determines a program to be copied (step S702).

  Next, EX_SOB is determined with reference to the playback order information of the determined program (step S703). Then, it is determined whether or not there is a simple moving image in the designated recorded program data (step S704). Specifically, the determination is made based on whether the target EX_SOB has a simple moving image flag or the PMT_PID has a value in the range of 0x1fc8-f. If it is determined that there is a simple video, the process proceeds to step 705. If it is determined that there is no simple video, the process proceeds to step S706.

  When it is determined that there is a simple video, a packet related to the simple video is selected from the designated video data as shown in FIG. 2, a stream is created, and the stream is recorded on a portable terminal or media. (Step S705), the management information is stored in the medium (Step S709), and this process is terminated.

  On the other hand, if it is determined that there is no simple moving image, a notification that there is no simple moving image is notified to the user using a display screen or the like, and it is asked whether or not to cancel (step S706). The reason why the user is requested to select whether or not to cancel is that re-encoding takes more time than simple video copy. In the case of cancellation (Y in step S707), this process ends.

  Then, when creating a simple moving image (N in step S707), EX_SOB is read, re-encoded, and data equivalent to the simple moving image is created and recorded on the mobile terminal or on the medium (step S708). ), The management information is stored in the medium (step S709), and the process is terminated.

  As described above, in the present embodiment, a simple moving image can be easily transferred from a HDD-DVD recorder, which is a fixed terminal, to a portable terminal, and a user such as a commuter, such as a train, can record it on the recorder. You can watch the video.

It is an object management format which shows the data structure of the moving image data used by one Embodiment of this invention. The figure for demonstrating the recording format according to each recording device at the time of recording the digital broadcast data used by the embodiment. The connection example of the fixed terminal and portable terminal of the embodiment. The flowchart for demonstrating the operation | movement process of the program menu display in the embodiment. The example of a display of the program menu in the embodiment. The flowchart for demonstrating the simple moving image detection operation | movement in the embodiment. 6 is a flowchart for explaining the operation of moving image copy processing to a mobile terminal in the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Recording video directory, 102 ... Video management information file, 103 ... Self video management directory, 104 ... Video object file, 105 ... Digital broadcast management directory, 106 ... Stream object file, 107 ... Stream object management file, 108 ... Stream attribute Information 109 ... EX_SOB1 general information 201 ... Received TS 202 ... Fixed terminal recording format 204 ... Mobile terminal recording format

Claims (4)

In a transfer method for transferring video data recorded in another portable terminal in a digital broadcast recording / playback device,
Determine if the recorded stream contains a simple video,
As a result of the determination, when it is determined that the simple video is included, only the packet necessary for playing the simple video is transferred to the mobile terminal,
A moving image data transmission method comprising: re-encoding and transferring for the portable terminal when it is determined that a simple moving image is not included. The moving image data transfer method according to claim 1, wherein a recording medium is used as a storage unit for the portable terminal.   2. The moving image data transfer method according to claim 1, wherein the presence or absence of the simple moving image is determined with reference to simple moving image flag data included in the broadcast data.   4. The moving image data transfer method according to claim 3, wherein whether to re-encode is determined based on identification information indicating that there is a simple moving image included in the digital broadcast data.

Images