JP2002077792A - Apparatus and method for recording magnetic tape, format of magnetic tape as well as recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable recording of video data of a high quality level on a magnetic tape. SOLUTION: A method for recording the magnetic tape comprises the steps of forming an ITI sector at the head of each track formed by helical in a longitudinal direction of the magnetic tape, and then forming a main sector and a sub-code sector. The method further comprises the step of forming a post-ample next to the sub-code sector. In this case, video data, audio data, AUX data, search video data and/or the like of a high quality level are recorded in the main sector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape recording apparatus and method, a magnetic tape format, and a recording medium, and more particularly, to a magnetic tape recording apparatus and method capable of recording high-quality video data on a magnetic tape. ,
The present invention relates to a format of a magnetic tape and a recording medium.

[0002]

2. Description of the Related Art Recently, compression techniques have been advanced, and video data and the like have been compressed by, for example, the DV (Digital Video) system and recorded on a magnetic tape. The format for this is a consumer digital video tape recorder (hereinafter referred to as consumer DVTR (Digital Video Tape Recorder).
r)) or DV format for business use
It is defined as DVCAM format of VTR.

[0003]

In the consumer DV format and the professional DVCAM format, the compression ratio of video data is 1/5 or 1/6, and high-definition video data (hereinafter HD (hereinafter referred to as HD)). High Definition) data could not be recorded for a long time.

Therefore, recently, MPEG (Moving) having a high compression rate has been developed.
Picture Expert Group (MP @ HL)
igh Level) and MP @ H-14 (MP High-1440) for recording on magnetic tape.

In order to record such a large amount of HD data, a high transfer rate is required. However, considering the video rate for MP @ HL, M
When recording on a magnetic tape in the PEG format or the professional MPEG format, there was a problem that the transfer rate became insufficient.

The present invention has been made in view of such a situation, and it is an object of the present invention to record HD data in a consumer MPEG format and a business MPEG format.

[0007]

A first magnetic tape recording apparatus according to the present invention comprises a compression means for compressing high-definition video data, video data compressed by the compression means, audio data corresponding to the compressed video data, and search data. First obtaining means for obtaining first group data including data or additional data, second obtaining means for obtaining second group data including subcode data related to the first group data, A third obtaining unit that obtains third group data including information related to the track, a synthesizing unit that synthesizes the first to third group data so as to be continuous, and the data synthesized by the synthesizing unit is recorded on a magnetic tape. And recording means for recording data on the track.

The compression means can compress high-definition video data in the MP @ HL or MP @ H-14 format.

A first magnetic tape recording method according to the present invention comprises:
A compression step of compressing high-quality video data; a first acquisition of acquiring the video data compressed by the processing of the compression step and a first group data including the corresponding audio data, search data, or additional data A second acquisition step of acquiring second group data including subcode data related to the first group data, and a third acquisition step of acquiring third group data including information on tracks. , First to third
And a recording step of recording the data synthesized by the processing of the synthesizing step on a track on a magnetic tape.

[0010] The program recorded on the first recording medium of the present invention includes a compression step of compressing high-quality video data, video data compressed by the processing of the compression step, audio data corresponding to the compressed video data, and search data. A first obtaining step of obtaining first group data including data or additional data, a second obtaining step of obtaining second group data including subcode data related to the first group data, A third obtaining step of obtaining third group data including information related to the track, a synthesizing step of synthesizing the first to third group data so as to be continuous, and magnetically synthesizing the data synthesized by the processing of the synthesizing step. Recording on a track on the tape.

According to the first magnetic tape recording apparatus of the present invention,
In the magnetic tape recording method and the program recorded on the first recording medium, the first to third group data are synthesized so as to be continuous and recorded on the magnetic tape.

According to a second magnetic tape recording apparatus of the present invention, a compression means for compressing high-quality video data, a first group data including the video data compressed by the compression means,
A first acquisition unit for acquiring second group data including information on the first track; a third group data including audio data corresponding to the video data compressed by the compression unit; Fourth group data including additional data or search data
Fifth group data including information about the track of
A second obtaining unit that obtains sixth group data including subcode data related to the first group data; and the first and second group data obtained by the first obtaining unit are continuous. A first synthesizing unit, a second synthesizing unit that synthesizes the third to sixth group data acquired by the second acquiring unit, and a first synthesizing unit.
Recording means for recording the data synthesized by the synthesizing means on the first track on the magnetic tape and recording the data synthesized by the second synthesizing means on the second track on the magnetic tape. It is characterized by.

The compression means can compress high-definition video data in the MP @ HL or MP @ H-14 format.

[0014] The second synthesizing means may form a gap between the third to sixth group data.

According to a second magnetic tape recording method of the present invention, a compression step of compressing high-definition video data, a first group data including the video data compressed by the processing of the compression step, and a first magnetic tape recording method. A first acquisition step of acquiring second group data including information on a track, a third group data including audio data corresponding to the video data compressed by the processing of the compression step, and additional data corresponding to the video data Alternatively, a fourth group data including search data, fifth group data including information on the second track, and sixth group data including subcode data related to the first group data are acquired. And the first and second group data obtained by the processing of the first obtaining step A first synthesis step of synthesizing a so that, the third obtained by the processing of the second acquisition step
A second synthesizing step of synthesizing the sixth to sixth group data; recording the data synthesized by the processing of the first synthesizing step on a first track on the magnetic tape; Recording the combined data on a second track on the magnetic tape.

The program recorded on the second recording medium of the present invention includes a compression step of compressing high-quality video data, a first group data including the video data compressed by the processing of the compression step, and A first acquisition step of acquiring second group data including information on the first track; and third group data and video data including audio data corresponding to the video data compressed by the processing of the compression step. The fourth group data including the corresponding additional data or the search data, the fifth group data including the information on the second track, and the sixth group data including the sub-code data related to the first group data. A second acquisition step to acquire, and first and second groups acquired by the processing of the first acquisition step. A first combining step of combining the data in a continuous manner, a second combining step of combining the third to sixth group data acquired by the processing of the second acquiring step, and a first combining step. Recording the data synthesized by the processing on the first track on the magnetic tape, and recording the data synthesized by the processing of the second synthesis step on the second track on the magnetic tape. It is characterized by.

According to a second magnetic tape recording apparatus of the present invention,
In the magnetic tape recording method and the program recorded on the second recording medium, the first and second group data are combined so as to be continuous and recorded on the first track on the magnetic tape. Along with the third to sixth
Are combined and recorded on the second track on the magnetic tape.

The format of the first magnetic tape of the present invention is a first group data including compressed high-definition video data, audio data, search data, or additional data, and a sub-group related to the first group data. A second group data including code data and a third group data including information on a track are continuously recorded on the track.

In the first magnetic tape format of the present invention, the first to third group data are recorded continuously.

According to the second magnetic tape format of the present invention, the first group data including the compressed high-definition video data and the second group data including the information on the first track include the first group data. On the track
Third group data including audio data corresponding to video data, fourth group data including additional data or search data corresponding to video data, and information regarding the second track, which are continuously recorded. The fifth group data and the sixth group data including the subcode data related to the first group data are recorded on the second track at a distance.

In the second magnetic tape format of the present invention, the first and second group data are continuously recorded on the first track, and the third to sixth group data are separated. Recorded on the second track.

[0022]

FIG. 1 shows a configuration example of a magnetic tape recording apparatus to which the present invention is applied. The video data compression unit 1 converts the input HD video signal into MP @ HL or MP @ H-14
(Hereinafter, HD data compressed by the MEPG method is referred to as HD MPEG data). The audio data compression unit 2 converts the audio signal corresponding to the HD video signal into, for example,
Compression is performed in a format corresponding to the DV format audio compression format. System data including AUX (auxiliary) data and subcode data is input from the controller 14 to the terminal 3.

The switch 4 is controlled by the controller 14 to appropriately select the output of the video data compression unit 1, the output of the audio data compression unit 2, or the system data supplied from the terminal 3 at a predetermined timing, and to select an error code. The ID is supplied to the ID adding unit 5. The error code ID adding unit 5 adds an error detection correction code or ID to the input data, performs an interleaving process between 16 tracks, and outputs the data to the 24-25 conversion unit 6. The 24-25 converter 6 converts the input 24-bit data into 25-bit data by adding redundant one bit selected so that the component of the tracking pilot signal is strong. I do.

The sync ITI generator 7 generates sync data, amble data, and ITI data to be added to data (FIG. 4 or FIG. 7) or subcode (FIG. 5) described later.

The switch 8 is controlled by the controller 14 to select one of the output of the 24-25 converter 6 and the output of the sync ITI generator 7, and outputs the selected output to the modulator 9. The modulator 9 converts the data input via the switch 8 into 1
Alternatively, randomization is performed to prevent consecutive zeros, and modulation is performed by a method suitable for recording on the magnetic tape 21 (the same method as in the DV format). To supply.

The parallel-to-serial converter 10 converts the input data from parallel data to serial data. The amplifier 11 amplifies data input from the parallel-to-serial conversion unit 10, supplies the data to the rotating head 13 that is attached to the rotating drum 12 and rotates, and records the data on the magnetic tape 21.

The controller 14 includes a magnetic disk 31,
When the optical disk 32, the magneto-optical disk 33, or the semiconductor memory 34 is mounted, the AUX recorded on the
The system data such as data and subcode data is read and output to the terminal 3.

FIG. 2A shows an MPEG format of a track formed on the magnetic tape 21 by the rotary head 13. The rotating head 13 traces the magnetic tape 21 from the lower right in the figure to the upper left, thereby forming a track inclined with respect to the longitudinal direction of the magnetic tape 21. The magnetic tape 21 is transported (runs) from right to left in the drawing.

FIG. 2B shows how data is recorded by the rotary head 13 when the rotary drum 12 makes one rotation. As shown in the figure, a main track pattern having a width of 10 μm and a sub-track pattern having a width of 8 μm are simultaneously recorded (formed). The configuration of the rotary head 13 will be described later.

In the case of a consumer MPEG format, 10 μm
The same HD MPE is used for the m width track and the 8 μm width track.
G data is recorded and the transfer rate per track is D
Complies with the V format.

On the other hand, in the case of the commercial MPEG format,
Different HD MPEGs are used for 10 μm and 8 μm wide tracks.
The data is recorded. Since this is a format for the editing function on the magnetic tape 21, gaps are formed between the sectors in one track. The transfer rate per track in the commercial MPEG format conforms to the DV format as in the consumer MPEG format.

FIG. 3 shows an example of the configuration of one track formed on the magnetic tape 21 in the MPEG format for consumer use. Note that the HD MPEG data is recorded after being converted into a 24-25 format, and the number of bits shown in FIG.
-25 represents the value after conversion.

The length of one track is a range corresponding to the 174-degree winding angle of the magnetic tape 21. This one
Outside the track range, an overwrite margin having a length of 1250 bits is formed. This overwrite margin is for preventing data from remaining unerased.

The length of one track is 60 × 1000/1
When the rotating head 13 is rotated in synchronization with the frequency of 001 Hz, the number of bits is set to 134975 bits. When the rotating head 13 is rotated in synchronization with the frequency of 60 Hz, 13485 bits are used.
It is set to 0 bit.

On one track, in the trace direction of the rotary head 13 (from left to right in FIG. 2), an ITI sector, a main sector, and a servo control signal are provided.
Subcode sectors are sequentially arranged.

An ITI (Insert and Track Information) sector has a length of 3550 bits, and has a leading
A 1400-bit preamble for generating a clock is arranged, followed by a 1920-bit preamble.
SSA (Start Sync Area) and TIA (Track Information Are)
a) is provided. In the SSA, a bit string (sync number) necessary for detecting a TIA is arranged. TIA
Includes information indicating that the format is a consumer MPEG format, information indicating that the mode is the SP mode or the LP mode,
Information indicating the pattern of the pilot signal of the frame is recorded. The TIA is followed by a 230-bit postamble.

The data of the above-mentioned ITI sector is generated by the sync ITI generation unit 7.

Following the 230-bit postamble of the ITI sector, a main sector having a length of 128975 bits is arranged. The main sector contains video data (VI
DEO), audio data (AUDIO), AUX data (AUX), or video data for Search (Serch-V). The structure of the main sector will be described later.

Subsequent to the main sector, a 1250-bit subcode sector is arranged. In the subcode sector, a track number, a time code number, and the like are recorded. The structure of this subcode sector will be described later.

After the subcode sector, a postamble is arranged. Data necessary for generating a clock is recorded in the postamble. The length of this postamble is such that the rotation of the rotary head 13 is 60 × 100
When synchronizing to a frequency of 0 × 1001 Hz, it is 1200 bits, and when synchronizing to 60 Hz, it is 1075 bits.

The above-described 1400-bit preamble and 1200-bit postamble are intended to provide a margin as a measure against PLL pull-in time, variation in mechanical accuracy, tape skew, and the like.

It should be noted that the consumer MPEG format is characterized in that it does not support editing on the magnetic tape 21, and basically no edit gap is formed between sectors. Hereinafter, a track arranged in the consumer MPEG format is referred to as a consumer main track.

FIG. 4 is a diagram showing details of the main sector structure shown in FIG. As shown in the figure, the main sector is composed of 141 sync blocks, and each sync block has a length of 878 bits.

The first 123 sync blocks are 16
Bit sync, 24-bit ID, 8-bit header,
It is composed of 750-bit data and 80-bit parity C1. The sync is generated by the sync generator 7. The ID is added by the error correction code ID adding unit 5. In the header, the data is video data, audio data,
It includes identification information for identifying whether the data is AUX data, search video data, or the like. The header data is supplied from the terminal 3 by the controller 14 as a type of system data.

The parity C1 is calculated and added by the error code ID adding section 5 from the ID, header, and data for each sync block.

Of the 141 sync blocks, the last 18 sync blocks have sync, ID, parity C
2 and a parity C1. Parity C2
Is obtained by calculating the header or data in the vertical direction in FIG. This calculation is performed in the error code ID adding unit 5.

When the rotation of the rotary head 13 is synchronized with 60 Hz, the substantial maximum recording data rate of the main sector is 27.6 from the following formula (1).
75 MHz. This bit rate can be MP @ HL or MP @
The rate is sufficient to record HD video data, audio compression data, AUX data, or search video data according to H-14. Maximum recording data rate = (data in one sync) x (number of sync blocks of recording data per track) x (number of tracks in one frame) x (frame frequency) = 750 bits x 123 sync blocks x 10 tracks x 30 Hz = 27.675 MHz (1)

The total amount of data in the track of the main sector is approximately 1238 from the calculation formula shown in the following equation (2).
It becomes 16 bits, and the total data amount after 24-25 conversion is
According to the calculation formula shown in the following formula (3), it is approximately 128975 bits. Total data amount in track = (total data length in one sync) × (total number of sync blocks per track) = 878 bits × 141 sync blocks ≒ 123816 bits (2) Total data amount after 24-25 conversion = ( (Total data amount in the track) × (25/24) = 123816 × (25/24) ≒ 128975 bits (3)

FIG. 5 is a diagram showing the structure of a subcode sector. As shown in the figure, one track subcode sector is composed of ten subcode sync blocks, and one subcode sync block is composed of a 16-bit sync, a 24-bit ID, and a 40-bit subcode data. , And 40-bit parity.

The sync is added by the sync ITI generator 7, and the ID is added by the error code ID adder 5. The subcode data is sent to the controller 14 via the terminal 3.
And includes, for example, a track number and a time code number. The parity is added by the error code ID adding unit 5.

The total data amount in the track of the subcode sector is 1200 bits from the calculation formula shown in the following equation (4), and the total data quantity after the 24-25 conversion is as shown in the following equation (5).
Is 1250 bits from the calculation formula shown in FIG. Total data amount in track = (total data length in one sync) × (total number of sync blocks per track) = 120 bits × 10 sync blocks = 1200 bits (4) Total data amount after 24-25 conversion = ( (Total data amount in the track) × (25/24) = 1200 × (25/24) = 1250 bits (5)

FIG. 6 shows a configuration example of one track of 10 μm width formed on the magnetic tape 21 in the commercial MPEG format. The number of bits of the numbers shown in FIG.
This represents a numerical value after the 4-25 conversion.

The length of one track is 60 × 1000/1.
When the rotating head 13 is rotated in synchronization with the frequency of 001 Hz, the number of bits is set to 134975 bits. When the rotating head 13 is rotated in synchronization with the frequency of 60 Hz, 13485 bits are used.
It is set to 0 bit.

In one track, an ITI sector as a servo control signal and a main sector are arranged in the trace direction of the rotary head 13 (from left to right in FIG. 2). A gap G1 is formed between them.

The ITI sector has a length of 3550 bits. A 1400-bit preamble is arranged at the head of the ITI sector. Next, an SSA and a T of 1920 bits are arranged.
IA is established. The TIA is followed by a 230-bit postamble.

The length of the gap G1 is 625 bits.

Next to the gap G1, a main sector having a length of 129,600 bits is arranged. Only video data (VIDEO) is recorded in the main sector.
The structure of the main sector will be described later.

In the MPEG format for business use, a gap is formed between sectors in one track because the format is intended for an editing function on the magnetic tape 21. Hereinafter, the trucks arranged as shown in FIG. 6 are referred to as a main truck for business use.

FIG. 7 is a diagram showing details of the main sector structure shown in FIG. As shown in the figure, the main sector is composed of 141 sync blocks, and each sync block has a length of 882 bits.

The first 123 sync blocks are 16 sync blocks.
Bit sync, 24-bit ID, 8-bit header,
It is composed of 754 bits of data and 80 bits of parity C1. The sync is generated by the sync generator 7. The ID is added by the error correction code ID adding unit 5. The header includes identification information for identifying whether the data is video data. The data in this header is
The data is supplied from the terminal 3 by the controller 14 as a type of system data.

Of the 141 sync blocks, the last 18 sync blocks are sync, ID, parity C
2 and a parity C1.

When the rotation of the rotary head 13 is synchronized with 60 Hz, the substantial maximum recording data rate of this main sector is approximately 2 from the following equation (6).
7.823 MHz. This bit rate is a rate sufficient for recording HD video data or AUX data by MP @ HL or MP @ H-14. Maximum recording data rate = (data in one sync) x (number of sync blocks of recording data per track) x (number of tracks in one frame) x (frame frequency) = 754 bits x 123 sync blocks x 10 tracks x 30 Hz 27.823 MHz (6)

Further, the total data amount in the track of the main sector is approximately 1244 from the calculation formula shown in the following equation (7).
It becomes 16 bits, and the total data amount after 24-25 conversion is
According to the calculation formula shown in the following expression (8), it is approximately 129600 bits. This is different from the consumer use, in which only video data is arranged, so that higher-quality video recording is possible. Total data amount in track = (total data length in one sync) × (total number of sync blocks per track) = 882 bits × 141 sync blocks ブ ロ ッ ク 124416 bits (7) Total data amount after 24-25 conversion = ( (Total data amount in track) × (25/24) = 124416 × (25/24)） 129600 bits (8)

FIG. 8 shows a configuration example of one track of 8 μm width formed on the magnetic tape 21 in the commercial MPEG format. The number of bits of the numbers shown in FIG.
-25 represents the value after conversion.

The length of one track is 60 × 1000/1
When the rotating head 13 is rotated in synchronization with the frequency of 001 Hz, the number of bits is set to 134975 bits. When the rotating head 13 is rotated in synchronization with the frequency of 60 Hz, 13485 bits are used.
It is set to 0 bit.

In this one track, in the trace direction of the rotary head 13 (from left to right in FIG. 2), an ITI sector, an audio sector, and an SV (S
ervo) A sector, an AUX / search sector, and a subcode sector are respectively arranged, a gap G1 is formed between the ITI sector and the audio sector, and a gap G2 is formed between the audio sector and the SV sector. A gap G3 is formed between the SV sector and the AUX / search sector, and a gap G4 is formed between the AUX / search sector and the subcode sector.

The ITI sector has a length of 3550 bits. A 1400-bit preamble is arranged at the head of the ITI sector. Next, an SSA and a T of 1920 bits long are arranged.
IA is established. The TIA is followed by a 230-bit postamble.

The length of the gap G1 is 625 bits.

The audio sector has a length of 3750 bits. The first 500 bits and the last 900 bits are a preamble or a postamble, respectively, and 2350 bits between them are data (audio data). The audio data here is arranged so as to be synchronized with the video data of one frame. This aims to prevent a time difference between the video and the audio at the time of MPEG recording, and improves the accuracy at the time of editing.

The length of the gap G2 is 625 bits.

The SV sector has a length of 700 bits. The SV sector is arranged near the center in the track as a servo control signal. This aims at improving the editing accuracy with respect to variations in track linearity, tape skew, or mechanical accuracy including the arrangement of heads. It is assumed that the structure of the SV data conforms to the DV format.

The length of the gap G3 is 625 bits.

The sector for AUX / search is 120825.
The first 700 bits and the last 700 bits are a preamble or a postamble, respectively, and 194425 bits between them are data (AUX data or video data for search).

The length of the gap G4 is 625 bits.

The subcode sector has a rotating head of 60 ×
When rotated at a frequency of 1000 × 1001 Hz, 36
If it is 50 bits and rotated at 60 Hz, 352
It is 5 bits. The first 1200 bits are preamble, and the last 1200 bits (when the rotating head is rotated at a frequency of 60 × 1000 × 1001 Hz) or 1075 bits (when the rotating head is 60
When rotated at a frequency of Hz).
0 bits are used as data (subcode data).

The ITI data serving as the edit point reference signal is the same as the ITI data of the main track for business use. Hereinafter, the tracks arranged as shown in FIG. 8 are referred to as business sub-tracks.

As described above, in the business sub-track,
Since a gap is arranged between each sector, each insert (video, audio, time code, or other additional data) and assemble editing can be performed in the same manner as in the DVCAM format.

Next, the operation of the apparatus shown in FIG. 1 will be described. The HD video signal is input to the video data compression unit 1 together with search video data (thumbnail video data), and is compressed by, for example, the MP @ HL or MP @ H-14 method. The audio signal is input to the audio data compression unit 2 and is compressed. The terminal 3 is supplied with system data such as subcode data, AUX data, and header from the controller 14.

The switch 4 is controlled by the controller 14, and outputs the video data (including video data for search) output from the video data compression unit 1 and the audio data compression unit 2
The audio data output from the terminal or the system data input from the terminal 3 is taken in at a predetermined timing and output to the error code ID adding unit 5 to synthesize these data.

The error code ID adding unit 5 is provided for each sync shown in the main sector (in the case of using the commercial MPEG format) in FIG. 4 or in the main sector (in the case of using the commercial MPEG format) in FIG. A 24-bit block
Add ID. The parity C shown in FIG. 4 or FIG.
1 is calculated and added for each sync block, and a parity C2 is added to the last 18 sync blocks of the 141 sync blocks instead of the header and the main data.

As shown in FIG. 5, the error code ID adding section 5 adds a 24-bit ID to each subcode sync block of the subcode data, calculates a 40-bit parity, and adds I do.

The error code ID adding section 5 further holds data for 16 tracks and interleaves the data between 16 tracks.

The 24-25 conversion unit 6 converts the data in 24-bit units supplied from the error code ID adding unit 5 into data in 25-bit units.

As shown in FIG. 4 or FIG. 7, the sync ITI generator 7 adds 16 sync blocks to each sync block of the main sector.
Add a bit sync. In addition, the sink ITI generator 7
Adds a 16-bit sync to each subcode sync block of a subcode sector, as shown in FIG.
Further, the sync ITI generator 7 generates a run pattern of the postamble and generates data of the ITI sector.

More specifically, the controller 14 switches the switch 8 to add (synthesize) the data, and the data output from the sync ITI generator 7 and the data
This is performed by appropriately selecting the data output from the −25 conversion unit 6 and supplying it to the modulation unit 9.

The modulation section 9 randomizes the input data, modulates the data by a method corresponding to the DV format, and outputs the modulated data to the parallel-serial conversion section 10. The parallel-serial conversion unit 10 converts the input data from parallel data to serial data, and supplies the serial data to the rotating head 13 via the amplifier 11. The rotating head 13
The input data is recorded on the magnetic tape 21.

Next, regarding compatible playback of the HD MPEG format and the DV format or DVCAM format,
This will be described below.

FIG. 9 shows a configuration example of the rotary head 13 of a consumer DVTR and a commercial DVTR.

FIG. 9A shows a rotary head 1 of a consumer DVTR.
3 shows a configuration example. As shown in the figure, the rotary drum 12 is provided with a rotary head 13-1 (for an even (Even) track) as a digital recording head and a rotary head 13-2 (for an odd (Odd) track). ing. Note that the pair of rotating heads 13-1 and 13-2 are arranged close to each other in order to trace the magnetic tape 21 simultaneously and in parallel. In other words, the rotary drum 12 of the consumer DVTR has a set of rotary heads 13-1 and 13-1.
-2 is mounted.

In this configuration example, main data is simultaneously recorded on even-numbered tracks and odd-numbered tracks.

FIG. 9B shows a rotary head 1 of a commercial DVTR.
3 shows a configuration example. As shown in the figure, the rotary drum 12 is provided with rotary heads 3-1 to 3-4 as digital magnetic heads. The rotary heads 13-1 and 13-3 and the rotary heads 13-2 and 13-4 are provided with azimuth heads of the same polarity at opposing positions separated by 180 degrees. Also,
In order to trace on the magnetic tape 21 in parallel at the same time,
One set of rotary heads 13-1 and 13-2 is disposed near each other, and the other set of rotary heads 13-3 and 13-1
3-4 are also arranged in the vicinity, respectively. That is,
The rotary drum 12 of the commercial DVTR has two sets of rotary heads 1
3-1 and 13-2 and 13-3 and 13-4 are mounted.

Further, the feature of the rotary head 13 mounted on the rotary drum 12 of the professional DVTR is that it is compatible with DVCAM format playback or DV format (LP (Long Plain)).
ying) mode) non-tracking playback and DV
Format, DVCAM format, or HD MPEG format for special playback. Therefore, the rotating heads 13-1 and 13-2 and the EXTRA heads 13-5 and 13-6 are arranged at positions shifted by 90 degrees from the rotating heads 13-3 and 13-4, respectively. Is done. Thereby, compatible reproduction and special reproduction can be performed.

In this configuration example, main data is recorded on an even track, and at the same time, sub data is recorded on an odd track.

It is assumed that the azimuth angle of each head of the even track and the odd track conforms to the DV format.

FIG. 10 shows the rotary head 13 shown in FIG.
FIG. 3 is a diagram showing recording specifications of each format recorded by the.

FIG. 10A shows the recording specification of the HD MPEG format. As shown in the drawing, the rotary head 13 records with a head width of 14 μm when forming a track pitch of 10 μm width, and records with a head width of 12 μm when forming a track pitch of 8 μm width. That is, with respect to the recording pattern on the even track side, the rotary head 13-2 or 13-
4 (in the case of a commercial MPEG format) is overwritten by 4 μm to form a track pitch of 10 μm. On the other hand, the rotating head 13-1 or 13-3 (in the case of a commercial MPEG format) on the even track side is overwritten by 4 μm with respect to the recording pattern on the odd track side to form a track pitch of 8 μm.

Note that these overwrite amounts can be arbitrarily set according to the relative height of the head.

FIG. 10B shows a DV format (SP (St
andard Playing) mode).
As shown in the figure, the rotary head 13 records with a head width of 14 μm when forming an even track pitch of 10 μm width, and records with a head width of 12 μm when forming an odd track pitch of 10 μm width. . That is,
The head on the odd track is overwritten by 4 μm with respect to the recording pattern on the even track to form a track pitch of 10 μm. On the other hand, for the recording pattern on the odd track side, the head on the even track side is set to 2 μm.
A track pitch of 10 μm is formed by overwriting.

FIG. 11 shows the data recorded as described above.
It shows the drum rotation speed and the tape speed in the case of compatible playback of the HD MPEG format and the DV format.

As shown in the figure, a consumer-use HD MPEG
When reproducing data in the format, the drum rotation speed is controlled to 7200 rpm (7200 rotations per minute) and the tape speed is controlled to 15.065 mm.
When reproducing MPEG format data, the drum rotation speed is 7200 rpm and the tape speed is 15.065 mm.
When the data in the DV format is reproduced in the SP mode, the drum rotation speed is 9000 rpm,
The tape speed is controlled so as to be 18.831 mm.

That is, based on the HD MPEG format, the playback speed in the SP mode of the DV format is set to 1.
By making it 25 times, compatible playback can be supported. Also,
Under the conditions of the configuration and specifications of the rotary head 13 as shown in FIG. 9, the SP mode of the DV format can also be recorded.

FIG. 12 shows the recordable time in each format.

FIG. 12A shows a tape of DV specification (evaporation ME).
(Metal Evaporated) tape) shows the recording time in each format. As shown in the figure, on a 30-minute DV tape,
In the case of the MPEG format, 37.5 minutes of recording is possible, and in the case of the professional HD MPEG format, 16.7 minutes.
Recording is possible, and in the case of the DV format in the SP mode, recording for 30 minutes is possible. In the case of a consumer-use HD MPEG format on a 60-minute DV tape, 75
Minutes, and in the case of the professional HD MPEG format, 33.3 minutes of recording is possible, and the SP mode DV
In the case of the format, recording for 60 minutes is possible.

FIG. 12B shows the recording time in each format when recording on a DVCAM specification tape (vapor-deposited ME tape). As shown in the figure, on a 40-minute DVCAM tape, in the case of a consumer HD MPEG format, 66.7 minutes of recording is possible, and
In the case of the HD MPEG format, 33.3 minutes of recording is possible, and in the case of the SP mode DV format, 60 minutes of recording is possible. 306.7 in the case of consumer HD MPEG format on DVCAM tape of 184 minutes specification
Minutes, and in the case of the professional HD MPEG format, 153.3 minutes of recording is possible.
In the case of the DV format, recording for 276 minutes is possible.

As described above, recording can be performed at a bit rate conforming to the DV format using the HD MPEG format.

As described above, in the case of the MPEG format for consumer use, video data, audio data, additional data (AUX data), or video data for search are continuously recorded without gaps. Therefore, it is possible to increase the bit rate of the video system and record a high-quality video on a magnetic tape.

On the other hand, in the case of the business-use MPEG format,
Only video data is recorded on a 10 μm wide track,
Audio data, additional data (AUX data), or video data for search is recorded on a m-wide track in a state where gaps are arranged and tape editing is enabled. In addition, it enables each insert and assemble editing.

The above series of processing can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, a program constituting the software executes various functions by installing a computer incorporated in dedicated hardware or various programs. For example, it is installed from a recording medium to a general-purpose personal computer or the like.

This recording medium, as shown in FIG.
A magnetic disk 31 (including a floppy disk) on which the program is recorded and an optical disk 32 (CD-ROM (Compact Disk-Read Only Memor) distributed to provide the program to the user separately from the magnetic tape recording apparatus main body.
y), DVD (including Digital Versatile Disk), magneto-optical disk 33 (including MD (Mini-Disk)), or package media including semiconductor memory 34, etc., as well as being pre-installed in the apparatus main body. ROM that stores programs that are provided to users in a locked state
And a hard disk.

In the present specification, the steps of describing a program recorded on a recording medium are not limited to processing performed in chronological order according to the described order, but are not necessarily performed in chronological order. This also includes processing executed in parallel or individually.

[0111]

As described above, the first magnetic tape recording apparatus, the first magnetic tape recording method, and the first magnetic tape recording apparatus of the present invention are described.
According to the program recorded on the recording medium, the first
Since the third group data is combined so as to be continuous and recorded on the magnetic tape, high-quality data can be recorded on the magnetic tape in the consumer MPEG format.

Further, according to the second magnetic tape recording device, the second magnetic tape recording method, and the program recorded on the second recording medium of the present invention, the first and second group data are Since the data is synthesized so as to be continuous and recorded on the first track on the magnetic tape, and the third to sixth group data are synthesized and recorded on the second track on the magnetic tape, high quality is achieved. Data
It becomes possible to record on a magnetic tape in a commercial MPEG format.

According to the first magnetic tape format of the present invention, the first to third group data are recorded continuously, so that high-quality data can be recorded on a consumer magnetic tape. It is possible to record in.

Further, according to the second magnetic tape format of the present invention, the first and second group data are continuously recorded on the first track, and the third group data is recorded on the third track.
Since the sixth to sixth group data are recorded on the second track at a distance, high-quality data can be recorded on a magnetic tape for business use.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a magnetic tape recording device to which the present invention has been applied.

FIG. 2 is a diagram illustrating an MPEG format of a track formed on a magnetic tape.

FIG. 3 is a diagram illustrating a main truck for consumer use.

FIG. 4 is a diagram illustrating a structure of a main sector in FIG. 3;

FIG. 5 is a diagram illustrating a structure of a subcode sector in FIG. 3;

FIG. 6 is a diagram illustrating a main truck for business use.

FIG. 7 is a diagram illustrating a structure of a main sector in FIG. 6;

FIG. 8 is a diagram illustrating a sub-track for business use.

FIG. 9 is a diagram illustrating a configuration example of a rotary head.

FIG. 10 is a diagram illustrating recording specifications of each format.

FIG. 11 is a diagram illustrating a drum rotation speed and a tape speed of each format.

FIG. 12 is a diagram illustrating a recordable time in each format.

[Explanation of symbols]

1 video data compression unit, 2 audio data compression unit, 5
Error code ID addition unit, 624-25 conversion unit, 7 sync ID generation unit, 9 modulation unit, 12 rotating drums, 1
3-1 to 13-6 magnetic head, 21 magnetic tape

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C018 BA02 CA02 CA05 CA06 FB04 FB05 5C053 FA17 FA22 GB01 GB06 GB21 GB37 JA02 JA03 5D044 AB05 AB07 BC01 CC03 DE02 DE03 DE15 DE52 DE55 EF05 GK08

Claims (11)

[Claims] 1. A magnetic tape recording apparatus for digitally recording high-definition video data on a track on a magnetic tape, comprising: compression means for compressing the high-definition video data; First acquisition means for acquiring first group data including video data and audio data, search data, or additional data corresponding thereto, and second acquisition including subcode data related to the first group data A second acquisition unit for acquiring group data; a third acquisition unit for acquiring third group data including information on the track; and a combination for combining the first to third group data in a continuous manner. Means, and recording means for recording data synthesized by the synthesizing means on a track on the magnetic tape. Magnetic tape recorder. 2. The magnetic tape recording apparatus according to claim 1, wherein the compression unit compresses the high-definition video data in an MP @ HL or MP @ H-14 format. 3. A magnetic tape recording method for a magnetic tape recording apparatus for digitally recording high-quality video data on a track on a magnetic tape, wherein: a compression step of compressing the high-quality video data; A first obtaining step of obtaining the video data compressed by the processing of the above and the first group data including the corresponding audio data, search data, or additional data; and a sub-group related to the first group data. A second obtaining step of obtaining second group data including code data, a third obtaining step of obtaining third group data including information on the track, and the first to third group data. A synthesizing step for synthesizing the data so as to be continuous; and Recording on a track on the tape. 4. A program for controlling a magnetic tape recording device for digitally recording high-quality video data on a track on a magnetic tape, comprising: a compression step of compressing the high-quality video data; A first obtaining step of obtaining the first group data including the video data compressed by the processing and the corresponding audio data, search data, or additional data; and a subcode related to the first group data. A second acquisition step of acquiring second group data including data; a third acquisition step of acquiring third group data including information on the track; and a continuous acquisition of the first to third group data. A combining step of combining the data, and a step of combining the data combined by the processing of the combining step with the magnetic tape. A recording step for recording on a track on a computer-readable recording medium. 5. A magnetic tape recording apparatus for digitally recording high-definition video data on a first track or a second track on a magnetic tape, comprising: compression means for compressing the high-definition video data; First acquisition means for acquiring first group data including the video data compressed by the compression means, and second group data including information on the first track; compressed by the compression means Third group data including audio data corresponding to the video data, fourth group data including additional data or search data corresponding to the video data, and fifth group data including information regarding the second track. , And a second group data including sub-code data related to the first group data. Acquisition means, first combination means for combining the first and second group data acquired by the first acquisition means so as to be continuous, and the first acquisition means acquired by the second acquisition means 3rd to 6th
A second synthesizing unit for synthesizing the group data of the above, and the data synthesized by the first synthesizing unit is recorded on the first track on the magnetic tape, and synthesized by the second synthesizing unit. Recording means for recording data on the second track on the magnetic tape. 6. The magnetic tape recording apparatus according to claim 5, wherein the compression means compresses the high-definition video data in MP @ HL or MP @ H-14 format. 7. The magnetic tape recording apparatus according to claim 5, wherein the second synthesizing unit forms a gap between each of the third to sixth group data. 8. A magnetic tape recording method for a magnetic tape recording apparatus for digitally recording high-quality video data on a first track or a second track on a magnetic tape, wherein the high-quality video data is compressed. A first acquiring step of acquiring first group data including the video data compressed by the processing of the compressing step, and a second group data including information on the first track. Third group data including audio data corresponding to the video data compressed by the processing of the compression step;
Fourth group data including additional data or search data corresponding to the video data, fifth group data including information on the second track, and subcode data related to the first group data A second acquisition step of acquiring sixth group data, a first combination step of combining the first and second group data acquired by the processing of the first acquisition step so as to be continuous, A second synthesizing step of synthesizing the third to sixth group data obtained by the processing of the second obtaining step, and a step of synthesizing the data synthesized by the processing of the first synthesizing step on the magnetic tape. The data recorded on the first track and the data synthesized by the processing of the second synthesizing step are recorded on the magnetic tape. Magnetic tape recording method characterized by comprising a recording step of recording the serial second track. 9. A program for controlling a magnetic tape recording apparatus for digitally recording high-quality video data on a first track or a second track on a magnetic tape, wherein the high-quality video data is compressed. A compression step; a first acquisition step of acquiring first group data including the video data compressed by the processing of the compression step, and a second group data including information on the first track; Third group data including audio data corresponding to the video data compressed by the processing of the compression step;
Fourth group data including additional data or search data corresponding to the video data, fifth group data including information on the second track, and subcode data related to the first group data A second acquisition step of acquiring sixth group data, a first combination step of combining the first and second group data acquired by the processing of the first acquisition step so as to be continuous, A second synthesizing step of synthesizing the third to sixth group data obtained by the processing of the second obtaining step, and a step of synthesizing the data synthesized by the processing of the first synthesizing step on the magnetic tape. The data recorded on the first track and the data synthesized by the processing of the second synthesizing step are recorded on the magnetic tape. Serial recording medium from which a computer readable program is recorded, characterized in that it comprises a recording step of recording the second track. 10. In a magnetic tape format in which digital data is recorded on a track, first group data including compressed high-definition video data, audio data, search data, or additional data;
A second group data including sub-code data related to the first group data and a third group data including information on the track are continuously recorded on the track. The format of the magnetic tape. 11. A magnetic tape format in which digital data is recorded on a first track or a second track, a first group data including compressed high-definition video data, and the first track. The second group data including information on the first track is continuously recorded on the first track, the third group data including audio data corresponding to the video data, and the third group data corresponding to the video data. The fourth group data including additional data or search data, the fifth group data including information on the second track, and the sixth group data including subcode data related to the first group data include: , Recorded on the second track at a distance from each other. Formats.