JP2000021089A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording device which can record an audio signal directly in a recording medium (optical disk) such as DVD-R and the like with a format with which reproduction can be performed in a DVD reproducing device without using an intermediate medium. SOLUTION: This device is provided with a signal input means 1 inputting an analog voice signal, an A/D converting means 2 converting an analog voice signal to a digital signal of a previously decided sampling frequency and the number of bits, a data format means 5 adding attribute information to a digital signal and converting it to a previously decided format, a data recording means 6 recording a digital signal converted to a previously decided format by the data format means 5 in a recording medium 15, a control means 7 controls the A/D converting means 2. the data format means 5, and the data recording means 6. and an operating means 8 inputting command information in the control means 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DVD-R disc (write-once digital versatile disc: Digital Ver.
satile Disk-Recordable) and DVD-RAM disc (D
The present invention relates to a recording device for recording a digital audio signal on a recording medium (disk) such as an digital versatile disk (Random Access Memory).

[0002]

2. Description of the Related Art At present, MPEG (Moving Picture Imag) is internationally standardized as a data compression method for moving images.
As an optical disk provided with video data compressed using the e Coding Expert Group) method and navigation data indicating a method of reproducing the video data, a DVD video disk (hereinafter referred to as a DVD disk) is known.
The logical format of the VD disk and the reproduction method of the DVD disk are defined in the DVD video standard, and are described in detail in JP-A-8-273304.

[0003] That is, data on a DVD disk is
It has a volume and file structure, and the format of the volume and file structure is defined as micro UDF and ISO9660, and the information is described in a management area defined in microUDF and ISO9660.

A write-once optical disc which is compatible with a DVD and on which a user can record information is a DV.
There is a D-R, and a DVD-R is described, for example, in the document "DVD-R which enables additional recording"
Months pp10-14 "are shown in detail.

[0005]

Here, the DVD-R disc has the same logical format as the DVD disc and can be reproduced in the same manner as the DVD disc. When trying to record a signal, as shown in FIG.
The audio signal to be recorded on the DVD is recorded as a material file in the memory 104, and the DVD authoring system 105
Creates an image file of logical data conforming to the DVD video standard, and creates an intermediate medium 1 such as a tape device.
06, the DVD formatter 107 converts the image file into sector format data conforming to the DVD video standard, and uses the data to record on a recordable disc (eg, optical disc) 109 by a recording device (cutting machine) 108. To be recorded.

However, the above-described recording process requires at least twice as long as the reproduction time of the recorded data. The reason why such a step is necessary will be described below.

[0007] That is, the data unit to be reproduced is content data containing at least one of a music signal (audio signal), a main video signal, and a sub video signal.
A plurality of data pack strings compressed and packetized by the EG2 method, and the head of the data pack strings are stored, and the reproduction information of the data packs and the navigation information describing the relationship with other data units are stored. The content data is reproduced based on the navigation information.

[0008] The set of data units is called a data cell, and the data cells are to be reproduced continuously in time series. Further, cell reproduction information relating to the reproduction of a data cell is described in a table outside the data cell, and is referred to as navigation data at the time of reproduction.

[0009] One complete video stream is a set of at least one data cell and is called a video object (VOB). A video object that stores at least one video object VOB having a common attribute is called a video object set (VOBS). Video title set information (VTSI) describing information for reproducing the video object set VOBS and attribute information, and its backup (VTSI_B)
UP) are arranged before and after each video object set VOBS to form one video title set.

[0010] Up to 99 video title sets can be arranged on the optical disc, and a video manager (VMG) in which information for managing the video title sets is described is arranged immediately before the video title set group. I have.

As can be seen from this, the video title set information (VTSI), which is the navigation data for the video object set, is undecided until the recording of the video object set is completed. The recording data of the manager is undecided until the recording of all video title sets is completed, and information for managing the recorded contents on the disc as files and directories is:
It is undecided until all data to be recorded on the disc is determined. Therefore, when an audio signal is to be recorded on a DVD-R disc, as shown in FIG. The signal is recorded as a material file in a memory 104 such as a hard disk,
An image file of logical data conforming to the DVD video standard is created by the VD authoring system 105, and temporarily recorded on an intermediate medium 106 such as a tape device.
The DVD formatter 107 performs the same sectoring and modulation of this image file as a physical format conforming to the DVD video standard, and
Therefore, a step of recording on the optical disk (DVD-R) 109 is required.

As described above, until all the video title sets to be recorded on the DVD-R are determined, the video manager VMG is not determined and cannot be recorded. A DVD-R on which the video manager VMG is not recorded cannot be played back by a DVD playback device. Therefore, the DVD-R has a drawback that it cannot be used in a manner such as a cassette tape recorder or an MD (mini disc) in which radio programs are recorded one after another or a plurality of types of music pieces are recorded one after another. Was.

The present invention is directed to a recording medium (optical disc) such as a DVD-R, which can reproduce an audio signal directly in a format that can be reproduced by a DVD reproducing apparatus without using an intermediate medium.
It is an object of the present invention to provide a recording device capable of recording information on a recording medium.

[0014]

In order to achieve the above object, the invention according to claim 1 comprises an analog-to-digital converter for converting an analog audio signal into a digital signal having a predetermined sampling frequency and a predetermined number of bits; Data format means for adding attribute information to the digital signal and converting the digital signal into a predetermined format, and data recording means for recording the digital signal converted into a predetermined format by the data format means on an optical information recording medium; A control means for controlling the analog-to-digital conversion means, the data format means and the data recording means, and an operation means for inputting command information to the control means.

According to a second aspect of the present invention, in the recording apparatus of the first aspect, the data formatting means collects a predetermined number of digital signals obtained by converting an analog audio signal from analog to digital and collects the digital signals according to the number of input channels. Frame data creating means for rearranging channel data, and data packetizing means for dividing the frame data created by the frame data creating means into a predetermined data length, and adding a data identification header to each of the divided data. Wherein audio data packetized by the data packetizer and video information data of a fixed pattern prepared in advance are combined and converted into a predetermined format.

According to a third aspect of the present invention, in the recording apparatus of the first or second aspect, the data formatting means formats the data into a logical structure that can be reproduced by a DVD video player. The audio data is arranged in the data cells in the video title set, the reproduction time of each data cell is fixed, and the number of data cells recorded in the video title set is increased or decreased according to the recording time. Recording device.

According to a fourth aspect of the present invention, in the recording apparatus according to the first aspect, the control means secures a reserve area of a predetermined capacity after a lead-in area of the optical information recording medium. A reserve area securing instructing means for instructing a data storage means, and the data formatting means for sequentially recording at least one video title set having the attribute information added thereto and stored in a predetermined capacity on the optical information recording medium. And a video title set recording instructing means for instructing the data recording means,
A lead-out recording instruction for instructing the data formatting unit and the data recording unit to record lead-out data after the area where the video title set was last recorded on the optical information recording medium by the video title set recording instruction unit. Means, and the data formatting means and the data formatting means for recording a video manager for managing the video title set at a rear end of the reserved area of the optical information recording medium on which the lead-out data is recorded by the lead-out recording instruction means. A video manager recording instructing unit for instructing a data recording unit, and a volume and file structure data recorded at a front end of the reserved area of the optical information recording medium on which the video manager is recorded by the video manager recording instructing unit. Volume / file structure data recording instruction means for instructing the data formatting means and the data recording means; and the reserved area of the optical information recording medium on which the volume and file structure data are recorded by the volume / file structure data recording instruction means. 0 data recording instructing means for instructing the data formatting means and the data recording means to record 0 data in an area between the area in which the volume and file structure data is recorded and the area in which the video manager is recorded; A lead-in data recording instruction for instructing the data formatting means and the data recording means to record lead-in data in the lead-in area of the optical information recording medium on which the zero data has been recorded by the zero data recording instruction means. Means It is characterized by having.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a recording apparatus according to the present invention. Referring to FIG. 1, the recording apparatus includes a signal input unit 1 for inputting an audio signal (analog audio signal) and an analog-to-digital conversion unit for converting the analog audio signal into a digital signal having a predetermined sampling frequency and a predetermined number of bits. (A / D conversion means) 2, data format means 5 for adding attribute information to a digital signal and converting the digital signal into a predetermined format, and recording the digital signal converted to a predetermined format by the data format means 5. Data recording means 6 for recording on the medium 15, analog-digital conversion means 2, control means 7 for controlling the data formatting means 5 and data recording means 6, and operation means 8 for inputting command information to the control means 7 I have.

Here, the data format means 5 comprises a frame data creation means 3 which collects a predetermined number of samples of a digital signal obtained by converting an analog audio signal from analog to digital and rearranges each channel data according to the number of input channels; 3. The data packetizing means 4 divides the frame data created by 3 into a predetermined data length, and adds a data identification header to each of the divided data. The converted audio data and video information data of a fixed pattern prepared in advance are converted into a predetermined format.

FIG. 2 is a diagram showing a specific configuration example of the recording apparatus of FIG. Now, the DVD-R as the recording medium 15
When an audio signal is to be recorded on a disk, the recording apparatus shown in FIG. 2 converts the audio data from the microphone 9 or the tape recorder 10 from analog to digital by the A / D converter 11 and creates a stream data from the converted digital signal. The device 12 adds a header for data identification and packetizes the packetized data.
After adding a video signal of a fixed pattern by the D formatter 13, the video signal is converted into a logical format conforming to the DVD video standard, and the recording device (cutting machine)
14 records on a disk (recording medium) 15. In addition, due to the above-described recording control, FIG.
In the configuration example, the system microcomputer / timer 1 that controls the A / D converter 11, the stream data creation device 12, the DVD formatter 13, and the cutting machine 14
6 and a key operation unit 17 for inputting command information to the system microcomputer 16 are further provided.

In the configuration example of FIG. 2, the microphone 9 or the tape recorder 10 corresponds to the signal input means 1 of FIG.
The A / D converter 11 corresponds to the A / D conversion means 2 in FIG.
The VD formatter 13 corresponds to the data formatting unit 5 in FIG. 1, and the cutting machine 14, the system microcomputer / timer 16, and the key operation unit 17 correspond to the data recording unit 6, the control unit 7, and the operation unit 8 in FIG. ing. In particular, the stream data creation device 12 corresponds to the frame data creation unit 3 and the data packetization unit 4 in the data format unit 5.

FIG. 3 is a diagram showing a logical structure of a recording medium (optical disk) that can be reproduced by a DVD reproducing apparatus (DVD video player). Referring to FIG. 3, at least a lead-in area 21, a volume and file structure area 22, a video manager (V
MG) 23, video title sets # 1 to #n, and a lead-out area 24.

Here, the video manager (VMG) 23 includes at least video manager information (VMGI) 25.
And backup of the video manager information (VMGI_
BUP) 26. The video manager (VMG) 23 has an optional video object set (V
MGM_VOBS) may be included.

Also, each video title set includes:
At least video title set information (VTSI) 27
And a video object set for video title set titles (VTSTT_VOBS) 28 and a backup of video title set information (VTSI_BUP) 29
And are included. Each video title set optionally includes a video object set for video title set menu (VTSM_V).
OBS) may be included.

FIG. 4 is a diagram showing a structure in the title video object set 28 of the video title set. A data string reproduced in a certain time is stored in a data unit 3
The data cell 30 is divided into a plurality of continuous data units 31 for each reproduction unit to form a data cell 30. Here, continuous data cell rows can be reproduced continuously without interruption
(Seamless playback).

A data unit 31 shown in FIG. 4 is a set of pack data which is a logical block unit of a recording medium, and the head of each data unit 31 has an attribute or the like in a data cell including the data unit. Are stored in the navigation pack (NAV pack) 32 in which the video pack (V
Packs 33 and audio packs (A packs) 34 are arranged one after another according to rules that can be reproduced by a predetermined reproducing apparatus.

At the time of reproducing the recorded disc, the video pack 33 and the audio pack 34 are collected separately.
Each is decoded simultaneously as separate stream data.

Linear PCM is permitted as uncompressed audio data that can be recorded on the DVD video disk described above, and its maximum transfer rate is 6,144 kbps.
The combination of the recordable sampling frequency, the number of quantization bits, and the number of channels within this range is shown in FIG.
become that way.

FIG. 6 is a diagram showing an example of the configuration of the control means 7 of FIG. 1. In the example of FIG. 6, the control means 7 has a reserved capacity of a predetermined capacity after the lead-in area 21 of the recording medium 15. A reserve area securing instruction means 41 for instructing the data recording means 6 to secure an area; and at least one video title set to which attribute information is added is divided into a predetermined capacity and sequentially recorded on the recording medium 15. A video title set recording instructing means 42 for instructing the data formatting means 5 and the data recording means 6 and a video title set recording instructing means 42 to read out the lead-out data after the area where the video title set was last recorded on the recording medium 15. Lead-out recording instructing means 43 for instructing the data formatting means 5 and the data recording means 6 to record; A video manager recording instructing the data formatting means 5 and the data recording means 6 to record a video manager for managing a video title set at the rear end of the reserved area of the recording medium 15 on which the lead-out data has been recorded by the lead-out recording instruction means 43. The instructing means 44 and the volume / instructing the data format means 5 and the data recording means 6 to record the volume and file structure data at the front end of the reserved area of the recording medium 15 where the video manager is recorded by the video manager recording instructing means 44. The file structure data recording instruction means 45 and the volume and file structure data of the reserved area of the recording medium 15 on which the volume and file structure data are recorded by the volume / file structure data recording instruction means 45 are stored. 0 data recording instruction means 46 for recording areas and video manager instructs the data formatting means 5 and the data recording unit 6 to record 0 data in the region between the recorded area,
Lead-in data recording instructing means 4 instructing data formatting means 5 and data recording means 6 to record lead-in data in lead-in area 21 of recording medium 15 on which 0 data has been recorded by 0 data recording instructing means 46.
7 are provided.

Next, a specific method for recording audio data in the format described above will be described. 7 and 8 show the stream data creation device 12 shown in FIG.
FIG. 4 is a diagram for explaining an operation of a VD formatter 13; FIG. 7 is a diagram showing the flow of the recording process, and FIG.
FIG. 4 is a diagram showing a frame data sequence to be recorded. FIG.
Referring to FIG. 8, in the audio data digitized by the A / D converter 11, the data of each channel is regularly arranged within a predetermined number of samples by the channel data multiplexing device 36 to form the frame data 51. Is done. At this time, the A / D converter 11 operates the operation panel as shown in FIG.
s), the number of quantization bits (Q), and the number of channels (Ch) are specified in advance, and the operation is performed according to the instruction. Since the generated frame data 51 has a predetermined number of samples, the reproduction time is a data unit having a constant reproduction time. Therefore, the reproduction time of each frame data at the time of reproduction can be uniquely obtained by determining the reproduction start time of the first frame data.
(Calculation of clock during playback).

Next, a medium for recording a frame data sequence
(DVD-R) is divided into sector units, and attribute data and the like are added to the head of the divided data to form an audio data packet 53. Furthermore, one audio packet 53
Are arranged in one audio pack 34. And
The audio pack 34 includes a video pack 33 in which previously prepared video data to be reproduced simultaneously is recorded.
And a time-division multiplexed pack sequence. The pack sequence is divided by a length to be reproduced within a fixed time (for example, 0.5 seconds), and a navigation pack 32 is added to the beginning of the divided sequence to form one data unit.

The data cell 30 is a set of a plurality of continuous data units 31. Here, the time during which one data cell is reproduced is fixed (for example, 5 minutes). By doing so, the attribute in the data cell of the data unit to be described in the navigation pack 32 can be obtained in advance.

The data cell 30 can be created by the above method. Next, a method of recording the created data cell 30 on a disk will be described below.

In the following example, one video title set is formed for one recording. A method of configuring the video title set will be described with reference to FIG.

Assuming that the number of video title sets VTS already existing on the recording medium is (n-1),
(n-1) th video title set (VTS # n-
1) After a certain area from the rear end is reserved for recording video title set information (VTSI) 27, recording of the data cell 30 reproduced for a predetermined time (for example, 5 minutes) is started. Since the length of the recording area of the video title set information (VTSI) 27 is increased or decreased depending on the number of data cells 30 to be recorded, an area is reserved assuming that the maximum possible number of data cells is recorded. .

A plurality of data cells 30 are sequentially recorded according to the recording time, and at the end of the current recording (recording), the remaining area in the last data cell is filled with silence data, and according to the number of recorded data cells 30. Video title set information (VT
SI) 27 is generated and the video title set information is backed up (VTS) from the end of the last data cell.
I_BUP) 29. The same thing (VT
SI) 27 is recorded in the reserved area after the last, and the remaining area is filled with 0.

A disc on which a plurality of video title sets (VTS) recorded as described above exist is converted to a normal DV
A finalizing operation is performed to enable reproduction by the D video player. The method will be described with reference to FIG.

First, when a video title set (VTS) is first recorded on a disc (when a recording operation is first performed), volume and file structure information (FS) 2
A certain section is reserved from immediately after the lead-in area 21 for the area of the video manager 9 and the video manager (VMG) 23. The length of this fixed section can be determined because the total number of video title sets (VTS) that can be recorded on the disc is limited to 99.

Next, for one recording, one video title set (VTS) is sequentially recorded from the inner circumference side, and after the recording of the last video title set is completed, the lead-out area 24 is recorded.

After the recording of the lead-out area 24 is completed, a video manager 23 for managing all the video title sets on the disc is generated, and is recorded in the reserved area after the last. This is the last information recorded as a file on the disc.

Thereafter, the volume and file structure information 22 for managing all the files recorded on the disk are recorded at the front end of the reserved area, and the remaining area is filled with zeros.

Finally, a lead-in signal is generated according to the size of the program area, and the signal is transferred to the lead-in area 2.
Record in 1 and complete.

That is, in the recording apparatus of the present invention, the configuration order of the video title set is set to the data cell, the backup of the video title set information, and the video title set information, and the recording order on the optical information recording medium is changed to the video title set, A lead-out signal, a video manager, volume and file structure information, and a lead-in signal are provided.

As described above, according to the present invention, an audio signal can be directly recorded on a recording medium (optical disc) such as a DVD-R in a format that can be reproduced by a DVD reproducing apparatus without using an intermediate medium. Compared with a conventional CD recorder, a relatively small device can record high-quality digital audio on many channels, and the disc can be reproduced using a general DVD video player.

[0045]

As described above, according to the first to fourth aspects of the present invention, an audio signal can be directly reproduced on a DVD-R by a DVD reproducing apparatus without using an intermediate medium. Can be recorded.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of a recording apparatus according to the present invention.

FIG. 2 is a diagram illustrating a specific configuration example of the recording apparatus in FIG. 1;

FIG. 3 is a diagram illustrating a logical structure of a recording medium (optical disc) that can be reproduced by a DVD reproducing apparatus (DVD video player).

FIG. 4 is a diagram showing a structure in a title video object set of a video title set.

FIG. 5 is a diagram showing an example of a combination of a sampling frequency, the number of quantization bits, and the number of channels that can be recorded on a DVD video disk.

FIG. 6 is a diagram illustrating a configuration example of a control unit in FIG. 1;

FIG. 7 shows the stream data creation device and the DV shown in FIG.
It is a figure for explaining operation of D formatter.

FIG. 8 shows a stream data creation apparatus and a DV shown in FIG.
It is a figure for explaining operation of D formatter.

FIG. 9 is a diagram showing an operation panel.

FIG. 10 is a diagram illustrating a configuration example of a video title set.

FIG. 11 is a diagram illustrating a finalizing operation of a recording operation.

FIG. 12 is a schematic block diagram of a conventional DVD video recording device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Signal input means 2 A / D conversion means 3 Frame data creation means 4 Data packetization means 5 Data formatting means 6 Data recording means 15 Recording medium 7 Control means 8 Operation means 9 Microphone 10 Tape recorder 11 A / D converter 12 Stream Data creation device 13 DVD formatter 14 Cutting machine 16 System microcomputer / timer 17 Key operation unit 21 Lead-in area 22 Volume and file structure area 23 Video manager 24 Lead-out area 25 Video manager information (VMGI) 26 Backup of video manager information (VMGI) -BUP) 27 Video title set information (VTS
I) 28 Title video object set of video title set (VTSTT_VOBS) 29 Backup of video title set information (VTSI_BUP) 41 Reserved area reservation instructing means 42 Video title set recording instructing means 43 Lead-out recording instructing means 44 Video manager recording instructing means 45 volume / file structure data recording instruction means 460 data recording instruction means 47 lead-in data recording instruction means 32 navigation pack 33 video pack 34 audio pack 51 frame data 53 audio data packet

Claims (4)

[Claims] 1. An analog-to-digital conversion means for converting an analog audio signal into a digital signal having a predetermined sampling frequency and a predetermined number of bits, and a data format means for adding attribute information to the digital signal and converting the digital signal into a predetermined format. Data recording means for recording a digital signal converted into a predetermined format by the data formatting means on an optical information recording medium; and control for controlling the analog-to-digital conversion means, the data formatting means, and the data recording means. Means for inputting command information to the control means. 2. The recording apparatus according to claim 1, wherein said data format means collects digital signals obtained by converting analog audio signals from analog to digital for a predetermined number of samples, and rearranges each channel data according to the number of input channels. Means for dividing the frame data created by the frame data creation means into predetermined data lengths, and adding a data identification header to each of the divided data; A recording apparatus configured to convert the audio data packetized by the conversion unit and video information data of a fixed pattern prepared in advance into a predetermined format. 3. The recording apparatus according to claim 1, wherein the data formatting means formats the data into a logical structure that can be reproduced by a DVD video player. A recording apparatus in which audio data is arranged, the reproduction time of each data cell is fixed, and the number of data cells recorded in a video title set is increased or decreased according to the recording time. 4. The recording apparatus according to claim 1, wherein the control unit instructs the data storage unit to reserve a predetermined capacity of a reserved area after a lead-in area of the optical information recording medium. Securing instructing means, and instructing the data formatting means and the data recording means to sequentially record at least one video title set having the attribute information added thereto and stored in a predetermined capacity on the optical information recording medium. Video title set recording instructing means, and the data formatting means and the data recording so as to record lead-out data after the last recorded area of the video title set on the optical information recording medium by the video title set recording instructing means. Means for instructing read-out recording means, Instructing the data formatting means and the data recording means to record a video manager for managing the video title set at a rear end of the reserved area of the optical information recording medium on which the lead-out data is recorded by an out recording instruction means. Video manager recording instructing means, and the data formatting means and the data so as to record volume and file structure data at a front end of the reserved area of the optical information recording medium on which the video manager is recorded by the video manager recording instructing means. Volume / file structure data recording instructing means for instructing recording means; and the volume / file structure data recording instruction means in front of the reserved area of the optical information recording medium in which the volume and file structure data are recorded. 0 data recording instructing means for instructing the data formatting means and the data recording means to record 0 data in an area between an area in which volume and file structure data is recorded and an area in which the video manager is recorded; Lead-in data recording instructing means for instructing the data formatting means and the data recording means to record lead-in data in the lead-in area of the optical information recording medium on which the zero data has been recorded by the zero data recording instructing means. A recording apparatus comprising: