JP2007095217A - Recording and reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording and reproducing apparatus in which a substantial original title can be left without being erased even if the original title used for a play list is erased. <P>SOLUTION: The recording and reproducing apparatus is characterized in that when a plurality of pieces of video information are specified out of a plurality of pieces of video information recorded by a user, a new video signal is created by the specified plurality of pieces of video information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording / reproducing apparatus capable of recording and reproducing video information.

A playback device equipped with a DVD drive is known. In the apparatus, a program list indicating the contents of information written on the DVD and a playlist indicating the reproduction order specified by the user of the written information are read together with management information of the DVD on which the information is written. ,
It is known that a program list and a play list are read out from these, and these are displayed simultaneously.
JP 2001-266459

However, in the conventional recording / reproducing apparatus, in order to prevent accidental deletion, the original program list and the playlist set by the user are divided and displayed, and there is a problem that the operability and efficiency are worse than the above reproducing apparatus. there were.

In the recording / reproducing apparatus, the present invention displays the original title and the playlist at the same time, and prevents the original title used in the playlist from being accidentally deleted. An object of the present invention is to provide a recording / reproducing apparatus in which an original title can be left without being deleted.

In order to achieve the above object, the recording / reproducing apparatus of the present invention provides:
Recording that records video information and reproduces the specified video information from a plurality of the recorded video information by a user according to a playlist that specifies the video information and the playback order of the specified video information In the playback device,
When the user designates a plurality of pieces of the video information among the plurality of pieces of recorded video information, a new video signal is created with the designated pieces of video information.

Even if the original video signal of the newly created video signal is deleted, the video signal remains, so that it is possible to cope with erroneous user erasure.

Also, video information is recorded, and the video information designated by the user according to a playlist that designates the video information and designates the reproduction order of the designated video information is reproduced from the plurality of recorded video information. In the recording / reproducing apparatus to
When the user specifies a plurality of the video information among the recorded video information, a new video signal is created with the specified video information,
When the user gives an instruction to delete the video signal that is the source of the new video signal, the original video signal is deleted.

Even if the user deletes the original video signal of the newly created video signal, the video signal remains in a part of the newly created video signal by deleting only the original video signal. Therefore, it is possible to cope with erroneous erasure by the user.

Also, the video information is recorded in the first folder, and is specified by the user according to a playlist that specifies the video information and the playback order of the specified video information from the plurality of recorded video information In the recording / reproducing apparatus for reproducing the video information,
When the user designates a plurality of the video information among the recorded video information, a new video signal is created with the designated video information and a playlist corresponding to the video signal is created. With
A playlist corresponding to the new video signal is recorded in the first folder, and the new video signal is recorded in a second folder.

And since the first folder is only a playlist and the original video signal is in another folder (second folder), even if the user accidentally deletes the playlist in the first folder, the original video signal Since the signal remains, it is possible to cope with erroneous deletion by the user.

Also, video information is recorded, and the video information designated by the user according to a playlist that designates the video information and designates the reproduction order of the designated video information is reproduced from the plurality of recorded video information. In the recording / reproducing apparatus to
When the user designates a plurality of the video information among the recorded video information, a new video signal is created with the designated video information and a playlist corresponding to the video signal is created. With
A video signal referred to in a playlist corresponding to the new video signal is treated as deletion prohibition.

Also, video information is recorded, and the video information designated by the user according to a playlist that designates the video information and designates the reproduction order of the designated video information is reproduced from the plurality of recorded video information. In the recording / reproducing apparatus to
When the user designates a plurality of the video information among the recorded video information, a new video signal is created with the designated video information and a playlist corresponding to the video signal is created. With
The video signal referred to in the playlist corresponding to the new video signal is displayed with a predetermined mark.

According to the present invention, when the user wants to continuously reproduce only a favorite title, the user does not create a playlist, but the user creates a title that combines the favorite titles as an original so that the user can perform an erroneous operation. Can prevent accidental deletion.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a recording / reproducing apparatus described in this embodiment. Although this embodiment shows a recording / reproducing apparatus capable of handling both a DVD-RAM and a hard disk as a recording medium, the present invention is also applied to an apparatus that handles only one of the recording media. Is possible.

1 is roughly divided, the left side shows the main blocks of the recording unit, and the right side shows the main blocks of the reproducing unit.

The playback processing in the recording / playback apparatus shown in FIG. 1 is performed according to program chain information (PGCI) indicating the playback order of programs. In this PGCI, a plurality of programs (PG
) And cell information (CI) is defined in this PGCI. Then, the cell entry point (C_EPI) is designated by the CI, and the VOB to be reproduced is specified. Also, a special PG for playback in the order of recording
C is referred to as an original PGC, and information on the original PGC is recorded as ORG_PGCI. Furthermore, the attribute information (resolution information, aspect information, audio attribute information, etc.) of the video data at this time is recorded in stream information (STI) in VMGI. The pack described above is a minimum unit for performing data transfer processing. further,
The minimum unit for logical processing is a cell, and logical processing is performed in this unit. Therefore, when recording is performed, the recording signal is converted into a format that matches the above format.
The recording / reproducing apparatus includes a hard disk drive device 2001, a disk drive 35 that rotates and drives an optical disk 1001 that is an information storage medium capable of constructing a video file, and reads / writes information from / to the optical disk 1001 and a recording side. Encoder unit 50
The decoder unit 60 constituting the reproduction side and the microcomputer block 30 for controlling the operation of the apparatus main body are main components.

The encoder unit 50 includes an ADC (analog / digital converter) 52, a V (video) encoder, an A (audio) encoder, an encoder group 53 including an SP (sub-picture) encoder, and an output of each encoder in a predetermined format. The formatter 56 and the buffer memory 57 are provided.

The ADC 52 receives an external analog video signal + external analog audio signal from the AV input unit 42 or an analog video signal + analog audio signal from the TV (television) tuner 44.

The ADC 52 converts the input analog video signal into, for example, a sampling frequency 13.5.
Digitizes in MHz and 8 quantization bits. That is, the luminance component Y and the color difference component C
r (or YR) and color difference component Cb (or YB) are each quantized with 8 bits.

Similarly, the ADC 52 digitizes the input analog audio signal with, for example, a sampling frequency of 48 kHz and a quantization bit number of 16 bits.

When a digital video signal or digital audio signal is input to the ADC 52, the ADC 52 causes the digital video signal or digital audio signal to pass through. Then, jitter reduction processing, sampling rate change processing, and the like may be performed on these digital video signals and digital audio signals without changing the contents.

The digital video signal output from the ADC 52 is sent to the formatter 56 via the V encoder. The digital audio signal output from the ADC 52 is sent to the formatter 56 via the A encoder.

The V encoder has a function of converting an input digital video signal into a digital signal compressed at a variable bit rate based on the MPEG2 or MPEG1 standard. Also,
The A encoder has a function of converting an input digital audio signal into a digital signal compressed at a fixed bit rate or a linear PCM digital signal based on the MPEG or AC-3 standard.

When sub-video information is input from the AV input unit 42 (for example, a signal from a DVD video player with an independent output terminal of a sub-video signal), or a DVD video signal having such a data structure is broadcast and is transmitted to the TV tuner 44. Is received, the sub video signal (sub video pack) in the DVD video signal is input to the SP encoder. The sub video signal input to the SP encoder is arranged in a predetermined signal form and sent to the formatter 56.

The formatter 56 conforms to a predetermined DVD format (file structure) by performing predetermined signal processing on the input video signal, audio signal, sub-picture signal, etc. while using the buffer memory 57 as a work area. The recorded data is output to the data processor 36.

Here, the recording / reproducing apparatus can supply the information encoded by the encoder unit 50 and the created management information to the hard disk device 2001 via the data processor 36 and record them on the hard disk. Information recorded on the hard disk can also be recorded on the optical disk 1001 via the data processor 36 and the disk drive 35. Furthermore, the information encoded by the encoder unit 50 and the created management information can be recorded on the optical disc 1001 via the data processor 36 and the disc drive 35.

Further, this recording / reproducing apparatus can record information on the hard disk without encoding processing on the optical disk 1001 when the information recorded on the hard disk of the hard disk apparatus 2001 is the same as the data format of the optical disk 1001.

If the information recorded on the hard disk of the hard disk device 2001 is different from the data format of the optical disk 1001, the information read from the hard disk is encoded by the encoder unit 50. The encoded information is stored in the optical disc 1001.
Can be recorded.

Here, a standard encoding process for creating recording data on the optical disc 1001 will be briefly described. That is, when encoding processing is started in the encoder unit 50, parameters necessary for encoding video (main video) data and audio data are set.

Next, the main video data is pre-encoded using the set parameters to calculate the optimum code amount distribution for the set average transfer rate (recording rate).
Based on the code amount distribution obtained by the pre-encoding process, the encoding process of the main video data is executed. At this time, the audio data encoding process is also executed. Similarly,
Parameters necessary for encoding the sub-picture data are set, and the encoded sub-picture data is created.

The encoded main video data, audio data, and sub-video data are combined and converted into a video object set VOBS structure.

That is, a cell is set as the minimum unit of main video data (video data), and cell information is created. Next, the configuration of the cells that make up the program chain PGC, and the attributes of the main video, sub-video, and audio are set (part of these attribute information is used by the information obtained when each data is encoded) Here, a VMG file including various information is created.

The encoded main video data, audio data, and sub-video data are subdivided into packs of a certain size (2048 bytes). In the pack, time stamps such as PTS (Presentation Time Stamp) indicating playback time and DTS (Decoding Time Stamp) indicating decoding time are described as appropriate. For the sub-picture PTS, a time arbitrarily delayed from the PTS of the main picture data or audio data in the same reproduction time zone can be described.

Each cell is arranged while an RDI pack (corresponding to a navigation pack) is arranged at the head of each video object unit VOBU so that the data can be reproduced in the time code order. Thereby, a video object VOB including a plurality of cells is configured. A video object set VOBS obtained by collecting one or more video objects VOB is recorded as a program in a movie video file.

When the DVD playback signal is digitally copied from the DVD video player, the contents of the cell, the program chain, the management table, the time stamp, and the like are determined from the beginning, and it is not necessary to create them again.

The parts for reading and writing (recording and / or reproducing) information with respect to the optical disc 1001 include a disc drive 35 having an optical system and a drive system, a data processor 36, a temporary storage unit 37, and an STC (system time). Counter or system time clock)
38.

The temporary storage unit 37 is connected to the optical disk 1 via the data processor 36 and the disk drive 35.
A certain amount of data written to 001 (data output from the encoder unit 50) is buffered, or data reproduced from the optical disk 1001 via the disk drive 35 and the data processor 36 (input to the decoder unit 60). Data) is used to buffer a certain amount of data. The disk drive 35 has a rotation control system, a laser drive system, an optical system, and the like for the optical disk.

For example, when the temporary storage unit 37 is composed of a 4 MB (Mega Bytes) semiconductor memory (DRAM), buffering of recording or reproduction data for about 8 seconds at an average recording rate of 4 Mbps (bit per second) Is possible. Further, when the temporary storage unit 37 is composed of a 16 MB EEPROM (Electrically Erasable and Programmable) ROM (flash memory), recording or reproduction data buffering of about 30 seconds at an average recording rate of 4 Mbps is possible. Is possible.

Further, the temporary storage unit 37 is a 100 MB ultra-compact HDD (hard disk drive).
In this case, recording or playback data buffering of 3 minutes or more can be performed at an average recording rate of 4 Mbps.

The temporary storage unit 37 can also be used to temporarily store recording information for a short time until the optical disk 1001 is replaced with a new disk when the optical disk 1001 is used up during recording.

However, since this recording / reproducing apparatus is provided with a hard disk device 2001 having a large capacity, this apparatus can be utilized.

The temporary storage unit 37 can also be used to temporarily store data read out from the normal drive within a certain time when a high-speed drive (double speed or higher) is adopted as the disk drive 35. . If the read data at the time of reproduction is buffered in the temporary storage unit 37, the reproduction data buffered in the temporary storage unit 37 is switched and used even when an optical head (not shown) causes a read error due to vibration shock or the like. Thus, it is possible to prevent the playback video from being interrupted.

The data processor 36 supplies the DVD recording data output from the encoder unit 50 to the disk drive 35 under the control of the microcomputer block 30,
The DVD reproduction signal reproduced from the optical disc 1001 is taken from the disc drive 35, the management information recorded on the optical disc 1001 is rewritten, and the data (file or video object) recorded on the optical disc 1001 is deleted.

The microcomputer block 30 has an MPU (micro processing unit) or CPU (central processing unit) and an RO in which a control program and the like are written.
M and RAM for providing a work area necessary for program execution.

The MPU of the microcomputer block 30 receives operation information from the key input unit 47 and uses the RAM as a work area based on a control program stored in the ROM.
Defect location detection, unrecorded area detection, recording information recording position setting, UDF recording, AV address setting, etc. are executed.

The microcomputer block 30 includes an information processing unit necessary for controlling the entire system, and includes a copy information detection / setting unit, a directory detection unit, and a VMG management information creation unit.

Among the execution results of the MPU, the content to be notified to the user of the disk drive 35 is the DVD
It is displayed on the display unit 48 of the video recorder or is displayed on the monitor display (not shown).
SD (on-screen display) is displayed.

The timing at which the microcomputer block 30 controls the disk drive 35, the data processor 36, the encoder unit 50, and / or the decoder unit 60 is ST
It can be executed based on the time data from C38. Recording and playback operations are usually executed in synchronization with the time clock from the STC 38, but other processing is performed in the STC.
It may be executed at a timing independent of 38.

The decoder unit 60 separates and extracts each pack from video information having a pack structure, a memory 63 used when pack separation or other signal processing is performed, and main video data (video pack) separated by the separator 62. The V decoder that decodes the sub-picture data (sub-picture pack contents) separated by the separator 62, and the audio data (audio pack contents) separated by the separator 62. The main video data obtained from the decoder group 64 by the A decoder and the main video data obtained from the V decoder are appropriately combined with the sub video data obtained from the SP decoder, and the menu, highlight button, subtitle and other sub-videos are superimposed on the main video and output. A video processor 66 is provided.

The output of the video processor 66 is input to the video mixer 71. Video mixer 7
In 1, the text data is synthesized. The video mixer 71 is also connected to a line that directly takes in signals from the TV tuner 44 and the A / V input unit 42. A frame memory 72 used as a buffer is connected to the video mixer 71. When the output of the video mixer 71 is a digital output, it is output to the outside via an interface (I / F) 73, and when it is an analog output, it is output to the outside via a DAC 74.

When the output of the A decoder is a digital output, it is output to the outside via the interface (I / F) 75, and when it is an analog output, it is converted into an analog signal by the DAC 77 via the selector 76 and output to the outside. The selector 76 can also select the output from the ADC 52 when the signal from the TV tuner 44 or the A / V input unit 42 is directly monitored by the select signal from the microcomputer block 30. The analog audio signal is supplied to an external component (2-channel to 6-channel multi-channel stereo device) (not shown).

In the above recording / reproducing apparatus, the flow of the video signal will be briefly described as follows. First, the input AV signal is digitally converted by the ADC 52. The video signal is input to the V encoder, the audio signal is input to the A encoder, and character data such as text broadcast is input to the SP encoder. The video signal is MPEG compressed and the audio signal is AC3 compressed or MP
EG audio compression is performed, and character data is run-length compressed.

The compressed data from each encoder is packetized so as to be 2048 bytes when packed, and input to the formatter 56. In the formatter 56, each packet is packed, further multiplexed, and sent to the data processor 36.

Here, the formatter 56 creates an RDI pack based on the aspect information and places it at the head of the video object unit (VOBU). The data processor 36 forms an ECC block every 16 packs, adds error correction data, and records the output on the optical disc 1001 via the disc drive 35. Here, because the disk drive 35 is seeking or track jumping, in the busy state, the disk drive 35 is put into the temporary storage unit 37 (for example, HDD buffer unit), and the DVD-RAM drive unit (disk drive 35).
Wait until you are ready.

Further, the formatter 56 creates each segmentation information during recording, and periodically sends it to the MPU of the microcomputer block 30 (information at the time of GOP head interruption, etc.).

The segmentation information includes the number of VOBU packs, the end address of the I picture from the beginning of the VOBU, and the playback time of the VOBU.

At the same time, the aspect information is sent to the MPU at the start of recording, and the MPU creates VOB stream information (STI). Here, the STI stores resolution data, aspect data, and the like, and at the time of reproduction, each decoder unit is initialized based on this information.

  In the recording / playback DVD, one video file is recorded on one disc.

Here, in a real-time recording / playback apparatus using a DVD, a point to be noted is that when data is accessed, it continues at least in order to continue playback without interruption during the access (seek). Sectors are needed. This unit is called CDA (Contiguous Data Area). That is, the data size is determined in advance to realize seamless reproduction.

This CDA is advantageously in units of ECC blocks. Therefore, the CDA size is a multiple of 16 sectors, and the file system performs recording in units of CDA. However, in this case, if there is not enough free space of CDA size in the disk, a short sector used by another file is allowed to enter the CDA. Thereby, recording can be performed in units of CDA.

FIG. 2 shows the hierarchical structure of the video manager (VMG), in which the system for managing the data reproduction order is shown in detail.

The playback order of data recorded in a video file is defined by a program chain (PGC) as shown in FIG. This program chain (PGC) has a cell (Cel).
1) is defined, and a VOB to be reproduced is defined in the cell (Cell). The part where the specific information of this PGC is recorded is the program chain information (PGCI) part in the VMG file. There are two types of PGCI, one is the original PGCI (ORG_PGCI) and the other is the user-defined PGC table (U
D_PGCIT).

The UD_PGC is information for managing the selected part (chapter or title) by arbitrarily selecting a part of the ORG_PGC, and is also called a play list. A plurality of UD_PGCs can be created.

FIG. 3 shows the contents of the program chain information table (PGIT) in the program chain information (PGCI) in more detail. As program chain information,
Program type (PG_TY) indicating whether or not the program corresponding to this program chain can be erased, the number of cells in this program, primary text information (PRM_TXTI) described in this program, pointer number to text information (IT_TXT_S)
RPN), representative image information (REP_PICTI = cell number and pointer in the cell)
Is described.

FIG. 4 also shows hierarchically the movie AV file information table (M_AVFIT) in the video manager (VMG). The information in this table is the recorded VO
The number of B (programs), the number of audio and sub-picture streams corresponding to each VOB, and the attributes (television system, aspect ratio, etc.) of each VOB are stream information (M_VOB_S).
TI). Further, as M_AVFI, information indicating whether the VOB is reproducible or temporarily erased and date / time information (recording time) when the VOB is recorded are described as general information. Further, as individual information, a search pointer for each VOB and system clock information as information (SMLI) for continuously reproducing a plurality of VOBs are described. Furthermore, VOBU time map information (TMAPI) in the VOB is described. The time map information can be used when special reproduction or the like is performed.

Here, this recording / playback apparatus is provided with a combined title creation function. FIG. 5 shows an example in which a plurality of selected titles or chapters are combined to create a new title.

In FIG. 5, as shown in FIG. 5A, when a user selects a favorite title (for example, B, C, I) using the key input unit 47 or a remote controller (not shown), the selected title is displayed below. When the creation button at the bottom right of the screen is selected, a new title K is created as shown in FIG.
Is created. The contents of title K are titles B, C, and I selected by the user in FIG. The above can be realized by newly creating the UD_PGC shown in FIG. 2, copying the designated title, and storing these in the work RAM of the microcomputer block 30. Further, the HDD 2001 or the temporary storage unit 37 may be used.

FIG. 6 is a diagram showing management in the case where the original title B is deleted in relation to FIG.
6 (a) and 6 (b) are the same as FIGS. 5 (a) and 5 (b), but FIG. 6 (c) is the same as FIG. 6 (b), and the user accidentally deleted the original title B. Show the case. In Fig. 6 (c), the original title
Since B is deleted, A, C to J and the title K created in FIG. 6B are displayed in the title list (above the drawing). However, in FIG. 6, the recording / reproducing apparatus of FIG. 1 performs only the process of removing the original title B from the display target as shown in FIG. 6C without deleting the original title B from the HDD 2001 or the optical disc 1001. Specifically, as shown in FIG. 7 to be described later, the folder is divided into a folder presented to the user and a folder storing the original title, and a folder presented to the user (here, FIG. It is possible by displaying the title displayed in c). This folder may be provided in the HDD 2001.

7 and 8 are diagrams for explaining a means for holding the original title (B) used for UD_PGC in FIG. 6 without deleting it. 7 and 8 assume that the playlist D specified by the user with the original titles A and B is created and the original titles A and B are not deleted in order to simplify the explanation. Yes.

First, in FIG. 7A, the original titles A, B, and C in the folder A are displayed in the same manner as in FIG. 5, and the user selects the titles A and B, thereby creating the playlist D. At this point, the recording / reproducing apparatus moves titles A and B to folder B. As shown in FIG. 7B, the recording / playback apparatus displays the title C and playlist D of folder A (however, if playlist D is designated, titles A and B are displayed). Is possible).

FIG. 8B shows an example in which deletion of the attributes of titles A and B is prohibited. This is shown in P of FIG.
This is possible by setting C_TY to the erasure prohibited PG. As a result, as shown in FIG. 8B, the original titles A and B can be prohibited from being deleted.

FIG. 9 is a diagram illustrating an example of alerting the user. FIG. 9 is based on the state of FIG. In FIG. 9B, a mark indicating that the title is used is displayed at the lower right corner of each title so that the user can know that the title used by the playlist K is B, C, or I. . This mark can be realized, for example, by putting it in IT_TXT indicated by IT_TXT_SRPN in FIG. If the user gives an instruction to delete a title with a mark, a confirmation message indicating that the title is used in the playlist K can be displayed to alert the user whether or not the title is erroneously deleted.

In the example described above, the title is described as an example, but it is also applicable in units of chapters.

The block block diagram of the recording / reproducing apparatus by one embodiment of this invention. The figure shown in order to demonstrate the hierarchical structure of video manager VMG in the embodiment. The figure shown in order to demonstrate the detail of the program chain information table PGIT in the embodiment. The figure shown in order to demonstrate the hierarchical structure of the movie AV file information table M_AVFIT in the embodiment. An example of creating a title by combining multiple selected titles. An example of how to manage a title selected when creating a playlist. An example of changing the folder location of the title used in the playlist. An example of prohibiting deletion of the attribute of a title used in a playlist. An example of displaying a playlist use mark in a title used for a playlist.

Explanation of symbols

30 Microcomputer block 37 Temporary storage unit 47 Key input unit 1001 Optical disc 2001 HDD

Claims (5)

Recording that records video information and reproduces the specified video information from a plurality of the recorded video information by a user according to a playlist that specifies the video information and the playback order of the specified video information In the playback device,
A recording / reproducing apparatus, wherein when a user designates a plurality of the pieces of video information among the plurality of pieces of recorded video information, a new video signal is created using the designated pieces of video information. Recording that records video information and reproduces the specified video information from a plurality of the recorded video information by a user according to a playlist that specifies the video information and the playback order of the specified video information In the playback device,
When the user specifies a plurality of the video information among the recorded video information, a new video signal is created with the specified video information,
The recording / reproducing apparatus according to claim 1, wherein when the user gives an instruction to delete the video signal that is a source of the new video signal, the video signal that is the source of the new video signal is deleted. The video information is recorded in the first folder, and the video specified by the user according to a playlist that specifies the video information and the playback order of the specified video information from the plurality of recorded video information In a recording / reproducing apparatus for reproducing information,
When the user designates a plurality of the video information among the recorded video information, a new video signal is created with the designated video information and a playlist corresponding to the video signal is created. With
A recording / reproducing apparatus, wherein a playlist corresponding to the new video signal is recorded in the first folder, and the new video signal is recorded in a second folder. Recording that records video information and reproduces the specified video information from a plurality of the recorded video information by a user according to a playlist that specifies the video information and the playback order of the specified video information In the playback device,
When the user designates a plurality of the video information among the recorded video information, a new video signal is created with the designated video information and a playlist corresponding to the video signal is created. With
A recording / reproducing apparatus, wherein a video signal referred to in a playlist corresponding to the new video signal is treated as a deletion prohibition. Recording that records video information and reproduces the specified video information from a plurality of the recorded video information by a user according to a playlist that specifies the video information and the playback order of the specified video information In the playback device,
When the user designates a plurality of the video information among the recorded video information, a new video signal is created with the designated video information and a playlist corresponding to the video signal is created. With
A recording / reproducing apparatus, wherein a video signal referred to in a playlist corresponding to the new video signal is displayed with a predetermined mark.

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