JPH09282844A - Digital information recording-reproducing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a digital VTR which can properly replace and edit a part of audio information data included in digital composite data of television signals recorded to a magnetic tape. SOLUTION: In the apparatus, a multiplication process for audio data DAA and coefficient data DKT by a multiplication part 74, a multiplication process for audio data DRA and coefficient data DKR by a multiplication part 79 and an addition process for audio data DAB and audio data DRB by a data addition part 80 are carried out while any of the audio data DAA, DRA, DAB and DRB is constituted of interleaved data segments. In consequence, edition audio data DAW is formed at the data addition part 80.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation of forming digital information data based on an information signal and recording the digital information data on a recording medium, and the digital information from the recording medium on which the digital information data is recorded. The present invention relates to a digital information recording / reproducing apparatus which performs an operation of reading data and reproducing an information signal based on the read digital information data.

[0002]

2. Description of the Related Art A television signal is converted into digital data, and inclined recording tracks are formed on a magnetic tape so as to be inclined with respect to the longitudinal direction thereof and recorded, and the digitalized television signal is inclined. A so-called digital video tape recorder (digital VTR), which reads a digital-data television signal from a magnetic tape recorded by forming recording tracks in an array and converts the digital signal into an analog signal, reproduces the magnetic tape from the magnetic tape. Recording and playback of television signals using
It has been proposed that this can be done without substantially reducing the quality of the television signal. Regarding such a digital VTR, a description of its example is given in, for example, a document issued by Nikkei BP: "Nikkei Electronics (NIKKEI ELECTRONICS)", 10-11 1993 (No. 592), No. 1.
It can also be found on pages 15-122.

Even in the case of such a digital VTR, for example, each frame of the television signal is recorded as a recording section. However, one frame of the television signal and the recording mode on the magnetic tape on which it is recorded. The relationship is as shown in FIG. In the example shown in FIG. 5, digital data obtained by analog / digital conversion (A / D conversion) of one frame of a television signal is sequentially formed on the magnetic tape TP to form inclined recording tracks TK. Of these, the data are distributed and recorded to 10 adjacent ones. Such records are
The rotary magnetic head to which digital data is supplied scans the magnetic tape TP, and arrows DT and DH in FIG. 5 indicate the traveling direction of the magnetic tape TP and the scanning direction of the rotary magnetic head with respect to the magnetic tape TP, respectively. Indicates.

Each of a large number of inclined recording tracks TK arranged and formed on the magnetic tape TP shows a data structure in the inclined recording tracks TK from the start end side to the end side thereof, and is used for data editing and the like. An area IT in which data serving as a position reference is recorded, an area AD in which audio information data representing the content of an audio signal in a television signal is recorded, and video information data representing the content of a video signal in a television signal are recorded. The area VD thus formed and the area SC in which time code data representing time information is recorded are formed.

The audio information data recorded in the area AD in one inclined recording track TK has, for example, a data synchronization block portion as a main portion, and a preamble portion and a postamble portion are arranged before and after the data synchronization block portion, respectively. The data synchronization block part that is configured and has a main part complies with a coding format as shown in FIG. 6, for example. In this coding format, the sync block number i is 2
14 data synchronization blocks each having a byte position number j of 0 to 15 are included.
It is formed with 90 bytes, which is 89.

In each of the nine data synchronization blocks having the synchronization block number i of 2 to 10, the first 2 bytes (byte position number j of 0 and 1) are used as the synchronization data, and the next 3 bytes ( Byte position number j is 2
4) is an ID code, the next 5 bytes (byte position number j is 5 to 9) is audio auxiliary data, and the following 72 bytes (byte position number j is 10 to 81) is audio data. , 8 bytes in the audio data (byte position number j is 8
2 to 89) inner parity is added. The ID code represents information about the recording mode regarding the inclined recording track, the synchronization block number i, etc.,
The audio auxiliary data represents information about the recording condition of the audio data including the number of constituent bits.

The audio data (audio data whose sync block number i is 2 to 10) in each of the nine data sync blocks whose sync block numbers i are 2 to 10 are shown in FIG. As shown in the figure, the number 3 is exemplified, and 36 data segments each having 2 bytes are included. Originally, as shown in FIG. 7, these data segments are from the first one in the audio data whose sync block number i is 2 to the last one in the audio data whose sync block number i is 10, for example,
It appears with consecutive segment numbers of D0 to D323. However, each tilt recording track TK is actually
In the audio information data recorded in the area AD in, the audio data in one frame of the audio information data dispersedly recorded in ten inclined recording tracks TK is recorded as a unit of audio error data. Interleave processing is performed on the data segments for reduction. Therefore, in the audio data included in the audio information data recorded in the area AD in one tilted recording track TK, 36 pieces of audio data having the sync block number i of 2 to 10 are formed. The segments will have their segment numbers not arranged in order but arranged according to the interleaving process.

In each of the five data synchronization blocks having the synchronization block number i of 11 to 15, the first 2 bytes (byte position number j of 0 and 1) are used as the synchronization data, and the next 3 bytes. Byte (Byte position number j
2 to 4) is an ID code, and the following 77 bytes (byte position number j is 5 to 81) are outer parity, and the outer parity is 8 bytes (byte position number j is 82 to 89) inner parity. Is added. Therefore, the audio data exists within the range indicated by the hatched lines in FIG. 6, in which the sync block number i is 2 to 10 and the byte position number j is 10 to 81. .

Under such a condition, a television signal including audio information data recorded in the area AD is formed from each of the inclined recording tracks TK which are formed on the magnetic tape TP by the digital VTR. In reading the digital composite data representing the data and obtaining the reproduced television signal based on the digital composite data, it is desired that not only the reproduced television signal can be obtained but also the editing of the audio information data can be performed. Things often happen. For editing such audio information data, for example, a part of the audio information data recorded in the area AD in the inclined recording track TK is changed to audio information data in which the audio data contained therein is replaced by another audio data. To be said.

Therefore, when editing the audio information data, the audio information data recorded in the area AD in each inclined recording track TK is sequentially read by the rotary magnetic head for reading and included in a part of the read audio information data. Audio data
With other audio data different from that, for example,
New audio that has been replaced by a crossfade method that causes a situation where one audio data gradually decreases and disappears and the other audio data appears and gradually increases within a relatively short period of time. Audio information data including data is formed, and a part of the original audio information data read by the reading rotary magnetic head is recorded in the area AD in each of the plurality of inclined recording tracks TK. Recording is performed on the recording medium using a recording rotary magnetic head.

For such an editing operation for audio information data, for example, a recording / reproducing system as shown in FIG. 8 is usually considered from the prior art. In the recording / reproducing system shown in FIG. 8, the magnetic tape is read by the reading rotary magnetic head 11 while being used together with the magnetic tape TP in which the inclined recording tracks TK are formed in an array as shown in FIG. Digital composite data DTT representing a television signal is read from TP.
The digital composite data DTT includes video information data, audio information data and other data, and the audio information data includes audio data composed of interleaved data segments.

The digital composite data DTT obtained from the reading rotary magnetic head 11 is amplified by the reproduction / amplification unit 12 and supplied to the inner parity error correction unit 14 through the equalizer unit 13. In the inner parity error correction unit 14, the digital composite data DTT
Error correction processing is performed on each of the video information data and the audio information data included in the code error detected by the inner parity of the video information data and the composite data DTO obtained by the error correction processing. 15 are supplied. In the outer parity error correction unit 15, the composite data DTO
Error correction processing is performed on each of the video information data and the audio information data included in the code error detected by the outer parity of the video information data and the video information data DVO subjected to the error correction processing. Then, the audio information data DAO subjected to the error correction processing is derived. The video information data DVO is supplied to the video information processing unit (not shown in FIG. 8), and the audio information data DAO is supplied to the deinterleave processing unit 16.

In the deinterleave processing unit 16,
One frame of audio information data DA with respect to the audio data included in the audio information data DAO
The deinterleave processing is performed on the interleaved data segment with the audio data in the entire O as a unit, whereby the audio data DAD having the original arrangement of the data segments is obtained. Then, the audio data DAD obtained from the deinterleave processing unit 16 is supplied to each of the digital / analog conversion unit (D / A conversion unit) 17 and the digital signal processing unit 20.

In the D / A converter 17, the audio data DAD is converted into an analog signal to obtain an audio signal SA, and the audio signal SA is amplified by the output amplifier 18 and is output as a reproduced audio signal SAO at an audio signal output terminal. 19 is derived.

On the other hand, during the selected period, the audio signal SR is A / A through the audio signal input terminal 21.
It is supplied to the D conversion unit 22. When the audio signal SR is supplied, the A / D conversion unit 22 performs A / D conversion on the audio signal SR to obtain audio data DAR based on the audio signal SR. A / D converter 22
A / D conversion for the audio signal SR in
The audio data DAR obtained thereby is subjected to coding as audio data in the coding format shown in FIG. That is, the audio data DAR also has a sync block number i of 2 to 1 which is shown by hatching in the coding format shown in FIG.
0 and the byte position number j is 10 to 81
It is assumed that it exists within a certain range.

The audio data DAR obtained from the A / D converter 22 is supplied to the digital signal processor 20. The digital signal processing unit 20 performs a data replacement process in which a part of the audio data DAD supplied from the deinterleave processing unit 16 is replaced by the audio data DAR supplied from the A / D conversion unit 22. The data replacement process is a cross-fade process in which the audio data DAD gradually decreases and disappears and the audio data DAR gradually increases in a relatively short period starting from the supply start time of the audio data DAR. Then, the audio data DAR is obtained instead of the audio data DAD, and thereafter, the audio data DAR gradually decreases in a relatively short period from the time before the end of the supply of the audio data DAR to the end of the supply of the audio data DAR. Cross fade processing is performed in which the audio data DAD gradually increases and the audio data DAD gradually increases, so that the audio data DAD can be obtained again instead of the audio data DAR. Odeta DAR
Is replaced by

In the data replacement process for the audio data DAD and the audio data DAR, the cross-fade process for obtaining the audio data DAR instead of the audio data DAD is performed as shown in FIG. 9, for example. , Reading rotary magnetic head 1
1 from the time t0 immediately after the leading edge of the frame reference signal PF associated with the digital composite data DTT to the time t1 thereafter. In the period from time t0 to time t1, the audio data D
Each of the AD and the audio data DAR is composed of a series of 511 data segments having segment numbers D0 to D510. Then, coefficient data DKt including 511 coefficient data segments representing 511 coefficient Kt corresponding to 511 data segments having segment numbers D0 to D510 in the audio data DAD is set, and coefficient data DKt is set.
Coefficient Kt represented by the coefficient data segment forming the
Is gradually reduced from 511 to 1, for example. On the other hand, coefficient data D including 511 coefficient data segments representing 511 coefficient Krs corresponding to 511 data segments having segment numbers D0 to D510 in the audio data DAR, respectively.
Kr is also set, and the coefficient Kr represented by the coefficient data segment forming the coefficient data DKr is, for example, 1 to 5
It will be gradually increased to 11.

Based on this, each of the 511 data segments in the audio data DAD and each of the 511 coefficient data segments in the corresponding coefficient data DKt are multiplied to obtain a first multiplication result. , 511 data segments in the audio data DAR and 511 coefficient data segments in the corresponding coefficient data DKr are multiplied to obtain a second multiplication result, and the first multiplication result and the second multiplication result are obtained. A calculation process is performed in which the multiplication result of and is added. As a result, in the period from time t0 to time t1 thereafter, the segment numbers are set to D0 to D510. 5
Audio data D consisting of 11 data segments
As the AD gradually decreases, the audio data DAR composed of 511 data segments having segment numbers D0 to D510 gradually increases,
Audio data DA instead of audio data DAD
R is obtained.

The cross-fade process in which the audio data DAD is obtained again instead of the audio data DAR is also performed in the same manner as described above.

Then, the digital signal processing section 20 performs a cross-fade process in which the audio data DAD gradually decreases and disappears and the audio data DAR gradually increases, and thereafter the audio data DAR gradually decreases. As a result, the editing audio data DAC is obtained which is formed by performing the crossfade process in which the audio data DAD gradually increases and the audio data DAD gradually increases. This editing audio data D
Interleaving processing unit 23 performs interleaving processing on the constituent data segments in AC in interleaving processing section 23, and as a result, editing audio data D subjected to the interleaving processing.
The CI is obtained and supplied to the edit unit 24.

In the edit section 24, the synchronizing data, the ID code and the audio auxiliary data are added to the editing audio data DCI to form the editing audio information data DCE. After that, the outer parity adding unit 25 adds outer parity to the editing audio information data DCE, and further, the inner parity adding unit 26 adds inner parity to the editing audio information data DCE. Information data DCZ is obtained. Then, the editing audio information data DCZ is transmitted to the recording rotary magnetic head 28 through the recording amplifying section 27, and is output to the digital signal processing section 20 in the area AD of each of the plurality of inclined recording tracks TK of the magnetic tape TP. The audio information data, which is the source of the audio data DAD provided for the data replacement by the data DAR, is supplied so as to be recorded in the recorded data.

[0022]

However, it is actually extremely difficult to properly perform the editing operation on the audio information data by the recording / reproducing system as shown in FIG. 8 described above. This is because in the recording / reproducing system as shown in FIG. 8, the audio information data is read from the area AD in the specific inclined recording track TK on the magnetic tape TP by the reading rotary magnetic head 11. Then, the edited audio information data DCZ for the read audio information data
For the data processing time required until the data is supplied to the recording rotary magnetic head 28 after the audio information data is read from the area AD in the specific inclined recording track TK by the read rotary magnetic head 11. It takes longer than the time required for the rotary magnetic head 28 to scan the area AD in the specific inclined recording track TK, and therefore the editing audio information data D
The CZ of the audio data DAD that is used for data replacement by the audio data DAR in the digital signal processing unit 20 in the area AD in each of the plurality of inclined recording tracks TK in the magnetic tape TP by the recording rotary magnetic head 28. This is because a situation occurs in which the original audio information data cannot be recorded in the recorded information.

The reading rotary magnetic head 11 and the recording rotary magnetic head 28 in the recording / reproducing system as shown in FIG. 8 described above are provided with a tape guide cylinder 30 as shown in FIGS. 10 and 11, for example. It is arranged with a positional relationship. That is, the tape guide cylinder 30 is arranged with a predetermined mutual separation angle θ about the central axis and a predetermined mutual separation distance h in the direction along the rotation axis of the tape guide cylinder 30. The arrow DD indicates the direction of rotation of the reading rotary magnetic head 11 and the recording rotary magnetic head 28. And, for example,
Under the condition that the width of the magnetic tape TP is 1/4 inch and the diameter of the tape guide cylinder 30 is approximately 21 to 22 mm, the rotary magnetic head 11 for reading and the rotary magnetic head 28 for recording respectively simultaneously scan. The distance between the two inclined recording tracks TK on the magnetic tape TP is limited to a distance corresponding to about 30 tracks, and it is impossible to set a distance exceeding the distance. That is, the time from when the reading rotary magnetic head 11 scans a specific tilted recording track TK on the magnetic tape TP to when the recording rotary magnetic head 28 subsequently scans the same specific tilted recording track TK is: It is limited to the time required for the reading rotary magnetic head 11 to scan each of the adjacent approximately 30 tracks of the inclined recording tracks TK as the magnetic tape TP runs. It means that it is impossible to set the time beyond that.

On the other hand, in the recording / reproducing system as shown in FIG. 8, the reading rotary magnetic head 11 can read the audio information data from the area AD in the specific inclined recording track TK on the magnetic tape TP. The data processing time required until the editing audio information data DCZ corresponding to the read audio information data is supplied to the recording rotary magnetic head 28 after the time point when the read rotary magnetic head 11 is read. Magnetic tape T
As the P travels, the time is set to be much longer than the time required to scan each of the approximately 30 tracks of inclined recording tracks TK that are successively adjacent to each other. This is the time required to perform scanning for each of the approximately 55 to 60 inclined recording tracks TK that are sequentially adjacent to each other as the vehicle travels.

As described above, the main reason why the data processing time in the editing operation for the audio information data by the recording / reproducing system as shown in FIG. 8 is a relatively long time is the inner parity error correction unit 14 and the outer part. There are error correction processing in the parity error correction unit 15, deinterleave processing in the deinterleave processing unit 16, interleave processing in the interleave processing unit 23, and the like, but these processes are indispensable when reproducing an information signal from digital information data. There is no way to lose it.

As described above, in the conventionally proposed digital VTR, another audio for a part of the audio information data contained in the digital composite data representing the television signal recorded on the magnetic tape is used. It is extremely difficult to properly perform editing such as replacement with information data.

In view of the above point, the present invention reads the digital information data from the recording medium on which the digital information data is recorded, and replaces a part of the read digital information data with other digital information data. It is possible to record a part of the digital information data that has been subjected to the replacement and the like to a position where a part of the original digital information data has been read in the recording medium. To realize a digital VTR capable of properly performing editing such as replacement of a part of audio information data included in digital composite data representing a television signal recorded in the above with another audio information data. Provided is a digital information recording / reproducing device capable of performing

[0028]

A first aspect of a digital information recording / reproducing apparatus according to the present invention is one of a data reading section for reading digital composite data from a recording medium and a digital composite data read by the data reading section. of,
Memory means for supplying first digital data including a plurality of interleaved data segments and having additional information data added thereto; and an additional information data representing period information of the first digital data. Forming a write control signal, and according to the write control signal,
The memory means includes a memory write control unit that causes an operation of writing a plurality of data segments in the first digital data in accordance with an interleave processing state, and a plurality of interleaved data segments. A data supply section for supplying second digital data to which is added, first coefficient data including a plurality of coefficient data segments respectively corresponding to a plurality of data segments in the first digital data, and a data supply section Coefficient data memory means storing second coefficient data including a plurality of coefficient data segments respectively corresponding to the plurality of data segments in the second digital data from Arrangement of multiple data segments in digital data A corresponding read control signal is formed, and a plurality of data segments in the digital data from the memory means are sequentially read according to the read control signal, and the first and second coefficient data from the coefficient data memory means, respectively. In the first digital data read from the memory means, and a memory read control unit that causes an operation of sequentially reading the plurality of coefficient data segments in the first digital data and the first data read from the coefficient data memory means. A first multiplication unit that performs a multiplication process on mutually corresponding ones of a plurality of coefficient data segments in one coefficient data, and a plurality of data segments and coefficient data memory in the second digital data from the data supply unit In the second coefficient data read from the means A second multiplication unit that performs a multiplication process on mutually corresponding ones of a plurality of coefficient data segments, and data addition that adds the output data from the first multiplication unit to the output data from the second multiplication unit. And a data recording unit for recording the addition output data obtained from the data addition unit at the position where the first digital data supplied to the first multiplication unit on the recording medium is read by the data reading unit. Composed.

In the first aspect of the digital information recording / reproducing apparatus according to the present invention configured as described above, the plurality of data segments and the first coefficient in the first digital data by the first multiplication unit are provided. A plurality of coefficient data segments in the data, which correspond to each other, a multiplication process for each other, a plurality of data segments in the second digital data and a plurality of coefficient data segments in the second coefficient data by the second multiplication unit, In the first digital data is added to the output data from the first multiplication section by the data addition section, and the first digital data is added to the output data from the second multiplication section. It is in a state where interleave processing has been applied to the multiple data segments that make it up, and Interleaving the plurality of data segments 2 of the digital data constituting it is done by Moto in the state which has been subjected. As a result, the first data segment having the plurality of interleaved data segments is recorded from the recording medium by the data reading unit.
From the time when the digital data of
The editing data obtained as the addition output data obtained from the data adding section corresponding to the digital data of is required to be supplied to the data recording section, and the data processing time is relatively short. It is possible to properly record the addition output data obtained from the data addition unit, which is the digital data for use, at the position where the first digital data supplied to the first multiplication unit in the recording medium is read by the data reading unit. You can do it.

Therefore, in the first aspect of the digital information recording / reproducing apparatus according to the present invention, when the digital VTR is constituted, the digital composite data representing the television signal recorded on the magnetic tape is formed. With respect to the included audio information data, a part of the audio information data can be properly edited by replacing it with another audio information data.

A second aspect of the digital information recording / reproducing apparatus according to the present invention is a data reading section for reading digital composite data from a recording medium, and an interleave process of the digital composite data read by the data reading section. Error correction means for correcting a code error in the first digital data including a plurality of data segments to which the additional information data is added, and the first digital data subjected to the code error correction by the error correction means. A write control signal is formed on the basis of the memory means to which the data is supplied and the additional information data representing the period information of the first digital data, and the memory means is provided with the first digital data in accordance with the write control signal. This results in multiple data segments being written depending on the interleaved state. A memory write control unit that includes a plurality of data segments interleaving processing has been performed,
A data supply section for supplying second digital data to which additional information data is added, first coefficient data including a plurality of coefficient data segments respectively corresponding to a plurality of data segments in the first digital data, and Coefficient data memory means storing second coefficient data including a plurality of coefficient data segments respectively corresponding to a plurality of data segments in the second digital data from the data supply unit, and based on the second digital data,
A read control signal is formed in accordance with the arrangement state of the plurality of data segments in the second digital data, and according to the read control signal, the plurality of data segments in the first digital data are sequentially read from the memory means. A memory read controller for causing an operation of sequentially reading a plurality of coefficient data segments in each of the first and second coefficient data from the coefficient data memory means, and a first digital read from the memory means. A first multiplication unit that performs a multiplication process on mutually corresponding ones of the plurality of data segments of the data and the plurality of coefficient data segments of the first coefficient data read from the coefficient data memory means, and a data supply A plurality of data sets in the second digital data from the section. From the first multiplication unit and a second multiplication unit that performs a multiplication process on mutually corresponding ones of the plurality of coefficient data segments in the second coefficient data read from the coefficient data memory means. The data addition unit that adds the output data to the output data from the second multiplication unit and the addition output data obtained from the data addition unit are the first digital data supplied to the first multiplication unit in the recording medium. And a data recording unit for recording at the position read by the reading unit.

In the second aspect of the digital information recording / reproducing apparatus according to the present invention configured as described above, interleave processing is performed on the digital composite data read from the recording medium by the data reading unit. A plurality of data in the first digital data that has been subjected to the code error correction by the first multiplying unit, the error correction means performing a code error correction on the first digital data including the plurality of data segments. Segment and first
Corresponding to each other in a plurality of coefficient data segments in the coefficient data, and a plurality of data segments in the second digital data and a plurality of coefficient data in the second coefficient data by the second multiplying unit Multiplication processing of mutually corresponding ones in the segment and addition processing of adding the output data from the first multiplication unit to the output data from the second multiplication unit by the data addition unit are The applied first digital data is in a state in which the interleave processing has been applied to the plurality of data segments constituting the second digital data, and the second digital data has the interleave processing applied to the plurality of data segments constituting the first digital data. It is done under the condition that it is applied. As a result, from the time when the first digital data having the plurality of interleaved data segments is read from the recording medium by the data reading unit, from the data addition unit corresponding to the first digital data The data processing time required until the editing digital data obtained as the obtained addition output data is supplied to the data recording unit, and the error correction processing time required for improving the quality of the editing digital data are also set. Including the addition output data obtained from the data addition unit which is regarded as the editing digital data for a relatively short time, the first digital data supplied to the first multiplication unit of the recording medium is converted by the data reading unit. It is possible to properly record at the read position.

Therefore, even in the second aspect of the digital information recording / reproducing apparatus according to the present invention, when the digital VTR is constituted, the digital composite data representing the television signal recorded on the magnetic tape is formed. With respect to the included audio information data, a part of the audio information data can be properly edited by replacing it with another audio information data.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows an example of a digital information recording / reproducing apparatus according to the present invention. In the example shown in FIG. 2, an operation of forming digital composite data representing the television signal based on the television signal and recording the formed digital composite data in a recording medium, and a digital representation of the television signal. The digital composite data is read from the recording medium on which the composite data is recorded, and an operation of reproducing a television signal based on the read digital composite data is performed.
As shown in FIG. 5, a digital VTR used together with the magnetic tape TP in which the inclined recording tracks TK are arranged is formed.

In the example shown in FIG. 2, the rotary magnetic head 31 for reading is used with the magnetic tape TP in which the inclined recording tracks TK are arranged and formed as shown in FIG. Digital composite data DTT representing a television signal is read from the magnetic tape TP. The digital composite data DTT includes video information data, audio information data and other data. The audio information data includes audio data and synchronization data composed of an array of interleaved data segments, ID data. It includes ancillary information data for audio data such as codes and audio auxiliary data.

The digital composite data DTT obtained from the reading rotary magnetic head 31 is amplified by the reproducing / amplifying unit 32 and supplied to the inner parity error correcting unit 34 through the equalizer unit 33. In the inner parity error correction unit 34, the digital composite data DTT
Error correction processing is performed on each of the video information data and the audio information data included in the code error detected by the inner parity of the video information data and the composite data DTO obtained by the error correction processing. 35 and the audio / outer parity error correction unit 36. In the outer parity error correction unit 35, the composite data D
For each of the video information data and the audio information data included in the TO, an error correction process is performed for a code error detected by the outer parity of the TO, and the video information data DVO subjected to the error correction process is output. The derived audio information data DAO is further derived.
The video information data DVO is supplied to the video information processing unit (not shown in FIG. 2), and the audio information data DAO is supplied to the selection contact 37a of the switch 37.

In the audio / outer parity error correction unit 36, error correction processing is performed on the audio information data included in the composite data DTO for the code error detected by the outer parity of the audio information data to perform error correction. The processed audio information data DAP is obtained. The audio information data DAP is additionally provided with audio data for increasing error correction processing capability for code errors.
Further error correction processing is performed in the inner parity error correction unit 38 and the audio outer parity error correction unit 39, and the audio information data DAQ subjected to the error correction processing is obtained from the audio outer parity error correction unit 39, That is the editing section 40
Is supplied to.

An error correction process for the audio information data included in the composite data DTO performed in the audio outer parity error correction unit 36, and further, an audio inner parity error correction unit 38 and an audio outer parity error correction unit 39. Since the error correction process for the audio information data DAP performed in the above step is an error correction process performed for the audio information data irrespective of the video information data, the required processing time is relatively short. For example, the processing time required for the error correction processing in the audio outer parity error correction unit 36,
The reading rotary magnetic head 31 is the total of the processing time required for the error correction processing in the audio inner parity error correction unit 38 and the processing time required for the error correction processing in the audio outer parity error correction unit 39. The time is set to a period corresponding to the scanning period for each inclined recording track TK.

On the other hand, during the selected period, the audio signal SR is A / A through the audio signal input terminal 41.
It is supplied to the D conversion unit 42. When the audio signal SR is supplied, the A / D conversion unit 42 performs A / D conversion on the audio signal SR to obtain audio data DAR based on the audio signal SR. A / D converter 42
A / D conversion for the audio signal SR in
The audio data DAR obtained thereby is subjected to coding as audio data in the coding format shown in FIG. That is, the audio data DAR obtained from the A / D converter 42 also has the sync block number i of 2 to 10 and the byte position indicated by hatching in the coding format shown in FIG. It is assumed that the number j exists within the range of 10 to 81.

Then, the audio data DAR obtained from the A / D converter 42 is supplied to the interleave processor 43. In the interleave processing unit 43, the audio data DAR is interleaved for the data segments that form the audio data DAR in units of one frame, and the audio information data obtained from the audio outer parity error correction unit 39. D
The data segment included in the audio data included in the AQ is subjected to the same interleaving process as that of the data segment. Interleaved audio data obtained in the same manner as the arrangement mode is obtained.

Further, in the interleave processing section 43, for example, from the control block 44 formed by a microcomputer, the synchronization data, I, as shown in FIG.
Control information data DI representing auxiliary information data for audio data such as D code and audio auxiliary data
A is supplied, whereby the interleave processing unit 43 is supplied.
In, the interleaved audio data is added with the synchronous data, ID code, and audio auxiliary data, which are auxiliary information data to the audio data, to form audio information data DRI.

The audio information data DRI obtained from the interleave processing unit 43 is stored in the editing unit 4
0 is supplied. In the edit section 40, the audio
In addition to the audio information data DAQ from the outer parity error correction unit 39 and the audio information data DRI from the interleave processing unit 43, the frame reference signal PF, the coefficient data shift control signal CK, and the operation mode setting signal CM are supplied.

The edit section 40 is specifically constructed, for example, as shown in FIG. In the specific example of the edit section 40 shown in FIG. 1, the audio information data DAQ from the audio outer parity error correction section 39 is supplied through the input terminal section 51. Audio information data DA through the input terminal section 51
Q is converted into parallel data by the serial-parallel conversion unit 52 and supplied to the data memory unit 53 formed by a random access memory (RAM).

The audio information data DAQ through the input terminal section 51 is also supplied to the frame start edge detecting section 54. In the frame start edge detector 54, the start edge of each frame is detected based on the synchronization block number i represented by the ID code included in the audio information data DAQ, and the detection output signal SFI representing the detected start edge of each frame is output. It is formed. The detection output signal SFI from the frame start edge detection unit 54 is supplied to the write control signal formation unit 55, and in the write control signal formation unit 55, the write control signal QW corresponding to the start edge of each frame represented by the detection output signal SFI. Are formed and are supplied to the data memory unit 53. As a result, in the data memory unit 53, the writing of the audio information data DAQ supplied from the serial-parallel conversion unit 52 is performed by the write control signal QW.
It is performed under the address control according to.

Further, the audio information data DRI from the interleave processing section 43 is supplied to the byte counting section 57 through the input terminal section 56. The byte reference section 57 has a frame reference signal P through the input terminal section 58.
F is also supplied. Then, the byte count unit 57 counts each byte data represented by the byte position number j in the audio information data DRI under the condition that it is newly started each time the frame reference signal PF arrives. A byte count output signal SBC representing the count result is obtained. The byte count output signal SBC from the byte count unit 57 is supplied to the read control signal forming unit 60 and the synchronous block count unit 61.

In the synchronous block counting section 61,
Based on the count result of the byte data represented by the byte count output signal SBC, the count of each data synchronization block represented by the synchronization block number i in the audio information data DRI is performed, and the synchronization block count output signal representing the count result. SSC is obtained. The synchronous block count output signal SSC from the synchronous block counting unit 61 is
It is supplied to the read control signal forming unit 60 and the track counting unit 62.

In the track counting section 62, the tilted recording tracks TK on the magnetic tape TP are counted based on the count result of the data sync block represented by the sync block count output signal SSC, and the count result is shown. A track count output signal STC is obtained. This track counting section 6
The track count output signal STC from 2 is supplied to the read control signal forming section 60.

In the read control signal forming section 60, a read control signal QR is formed which corresponds to each of the byte count output signal SBC, the synchronous block count output signal SSC and the track count output signal STC, which is the data. It is supplied to the memory unit 53 and the coefficient data memory unit 63. In the coefficient data memory unit 63, the audio information data D written in the data memory unit 53
A plurality of coefficient data segments forming the coefficient data DKT representing a plurality of coefficients Kt ′ corresponding to the interleaved data segments forming the audio data included in the AQ are the data memory unit 53.
Is stored in a storage mode corresponding to the storage mode of the interleaved data segment in FIG. 1, and is interleaved to form audio data included in the audio information data DRI supplied through the input terminal unit 56. Arrangement mode of interleaved data segments in which a plurality of coefficient data segments forming coefficient data DKR representing a plurality of coefficients Kr ′ respectively corresponding to data segments form audio data included in audio information data DRI Is stored in a storage mode corresponding to.

Further, the coefficient data memory section 63 has a coefficient data shift control signal CK,
And an operation mode setting signal CM through the input terminal portion 65
From the control signal forming unit 66 to which the control signal forming unit 66 is supplied.
Is supplied.

When the operation mode setting signal CM supplied to the control signal forming section 66 indicates the editing operation mode and the control signal C1 is set in accordance with the editing operation mode, the coefficient data memory section 63 outputs. The reading of each of the coefficient data DKT and the coefficient data DKR is performed under the address control in accordance with the read control signal QR from the read control signal forming unit 60, and the coefficient data memory unit 63 outputs the coefficient data DKT and the coefficient data DKR. The coefficient data DKR is transmitted.

Along with that, the data memory unit 53
Audio information data D written to it from
The reading of AQ is performed under the address control according to the read control signal QR from the read control signal forming section 60, and the audio information data DAQ is sent from the data memory section 53. In such a case, the data memory unit 5
Of the audio information data DAQ from 3 and
The reading of the coefficient data DKT and the coefficient data DKR from the coefficient data memory unit 63 is performed by the read control signal forming unit 60 in accordance with the address control according to the common read control signal QR formed based on the audio information data DRI. By performing the interleaving process on the audio data included in the audio information data DAQ sent from the data memory unit 53, and the plurality of coefficient data sent from the coefficient data memory unit 63. The coefficient data segments forming the DKT correspond to each other, and the interleaved data forming the audio data included in the audio information data DRI supplied through the input terminal unit 56 is processed. Each segment and coefficient data Each transgressions of the coefficient data segments constituting a plurality of coefficient data DKR sent from memory unit 63, is intended to mutually correspond to each other.

The audio information data DAQ transmitted from the data memory section 53 is turned on by the control signal C3 from the control signal forming section 66 when the operation mode setting signal CM indicates the editing operation mode.
Through the audio data processing unit 72 and the auxiliary information data processing unit 73. In the audio data processing unit 72, the audio data included in the audio information data DAQ is taken out, and it is necessary depending on the substance of the audio signal represented by the audio data such as a 2-channel signal or 4-channel signal. Audio data D
AA is formed. Then, the audio data processing unit 7
The audio data DAA obtained from No. 2 is the multiplication unit 74
Is supplied to.

When the audio information data DRI from the input terminal section 56 is converted into parallel data by the serial-parallel conversion section 75 and the operation mode setting signal CM indicates the editing operation mode, the control signal forming section 66 outputs the data. Switch 7 turned on by control signal C2
6 to the audio data processing unit 77 and the attached information data processing unit 78. In the audio data processing unit 77, the audio data included in the audio information data DAI is taken out, and it is necessary according to the substance of the audio signal represented by the audio data such as a 2-channel signal or a 4-channel signal. Then, the audio data DRA is formed. The audio data DRA obtained from the audio data processing unit 77 is stored in the multiplication unit 7
9.

The coefficient data DKT and the coefficient data DKR sent from the coefficient data memory section 63 are supplied to the multiplication section 74 and the multiplication section 79, respectively. In the multiplication unit 74, the interleaved data segment forming the audio data DAA and the coefficient data segment forming the coefficient data DKT that correspond to each other are multiplied to obtain the audio data DAA. With respect to each of the interleaved data segments that constitute the data segment, a multiplication process result representing the data segment obtained by being multiplied by the coefficient Kt ′ represented by the coefficient data segment forming the corresponding coefficient data DKT is obtained, and In the multiplication unit 79, the interleaving process that constitutes the audio data DRA is performed, and the multiplication process is performed on the data segment and the coefficient data segment that constitutes the coefficient data DKR that correspond to each other. For each of the interleaved data segments forming the data DRA, the multiplication processing result representing the data segment obtained by being multiplied by the coefficient Kr ′ represented by the coefficient data segment forming the corresponding coefficient data DKR is obtained. To be

Then, the audio data DAB based on the multiplication processing result is obtained from the multiplication unit 74, and the audio data DR based on the multiplication processing result is obtained from the multiplication unit 79.
B is obtained. Audio data DA from the multiplication unit 74
B and the audio data DRB from the multiplication unit 79 are subjected to addition processing in the data addition unit 80 to form audio data DAW.
The audio data DAW is obtained from. Then, the audio data DAW obtained from the data addition unit 80 is
The audio data for editing is supplied to the selection contact 82a in the switch 82 through the limiter unit 81.

The audio data DAA obtained from the audio data processing unit 72 is obtained from the audio data processing unit 79 by the multiplication processing in each of the multiplication units 74 and 79 and the addition processing in the data addition unit 80. A data replacement process that is to be replaced by the data DRA is performed. Then, in the data replacement process, for example, deinterleaving process is performed on the audio data DAW that is the editing audio data obtained from the data adding unit 80 later, and thereby the audio data DA is substantially obtained.
When the deinterleaving process for B and audio data DRB is to be performed, the operation mode setting signal CM indicates the edit operation mode, and accordingly the switch 7
A cross fade in which the audio data DAA gradually decreases and disappears and the audio data DRA gradually increases in a relatively short period starting from the start point of the editing operation performed with both 1 and 76 turned on. After the processing is performed, the audio data DRA is obtained in place of the audio data DAA, and thereafter, the audio data DRA is gradually reduced in a relatively short period from the time before the end of the editing operation to the end time of the editing operation. Audio data DA
A crossfade process in which A gradually increases is performed so that the audio data DAA is obtained again instead of the audio data DRA. Thereby, a part of the audio data DAA is replaced by the audio data DRA.

In the data replacement process for such audio data DAA and audio data DRA,
Audio data DR instead of audio data DAA
The crossfade process for obtaining A is performed by the reading rotary magnetic head 31 as shown in FIG. 3, for example.
From the time t0 immediately after the leading edge of the frame reference signal PF associated with the digital composite data DTT obtained from the time t2 to the time t2 thereafter. During the period from the time t0 to the time t2, the segment numbers D0, D45, D90 in which the audio data DAA and the audio data DRA are connected in a predetermined arrangement mode which is not in numerical order due to the interleave processing. , ..., so that the multiple data segments that make up each will be obtained with mutual synchronization.

Further, in this case, the coefficient data memory unit 6
If the coefficient data shift control signal CK supplied to No. 3 does not substantially act, the coefficient data memory unit 63
Coefficient data DKT and coefficient data DKR sent from
Also, the coefficient data segments forming each of the
From the start time t0 in the period from the time t2 to the time t2, the audio data DAA and the audio data DR
It is obtained in a synchronized state with the interleaved data segments forming each of A. And
The coefficient Kt ′ represented by each of a number of coefficient data segments in the coefficient data DKT corresponding to the audio data DAA is calculated by the multiplication unit 74 as the audio data DA.
When deinterleaving is performed on the audio data DAB obtained by the multiplication with the data segment forming A, the data segment forming the audio data DAB is gradually reduced.
Also, coefficient data D corresponding to the audio data DRA
The coefficient Kr ′ represented by each coefficient data segment in KR is the audio data DR in the multiplication unit 79.
When deinterleaving is performed on the audio data DRB obtained by multiplication with the data segment forming A, the number of data segments forming the audio data DRB is gradually increased.

As described above, when the coefficient data shift control signal CK supplied to the coefficient data memory unit 63 does not substantially act, the audio data DAA
Instead, the cross-fade process, which results in the audio data DRA, is started from time t0 immediately after the leading edge of the frame reference signal PF, and thus substantially from the beginning of the frame.

On the other hand, when the coefficient data shift control signal CK supplied to the coefficient data memory unit 63 substantially acts, each of the coefficient data DKT and the coefficient data DKR sent from the coefficient data memory unit 63. The coefficient data segment constituting the time t3 is not obtained from the starting time t0 in the period from time t0 to time t2, but is arbitrarily set later than time t0, for example, as shown in FIG. Will begin to be obtained from. Thus, the coefficient data DKT and the coefficient data DK
Even if the coefficient data segment forming each of R starts to be obtained from time t3, the obtained coefficient data D
The order of the coefficient data segments forming each of the KT and the coefficient data DKR is such that the coefficient data shift control signal CK supplied to the coefficient data memory unit 63 does not substantially act, and the coefficient data DKT and the coefficient data DK are arranged.
This is the same as when the coefficient data segment forming each of R starts to be obtained from time t0.

As described above, when the coefficient data shift control signal CK supplied to the coefficient data memory unit 63 is substantially operated, the audio data DRA is obtained instead of the audio data DAA. The fade processing is arbitrarily set later than the time t0 immediately after the leading edge of the frame reference signal PF, and thus,
It will be started from an arbitrary point in the middle of the frame.

The cross-fade process in which the audio data DAA is obtained again instead of the audio data DRA is also performed in the same manner as described above.

In the attached information data processing section 73 to which the audio information data DAQ is supplied through the switch 71, the synchronization data, the ID code and the audio auxiliary data included in the audio information data DAQ are taken out, and these are attached to the attached information data Dap. Is supplied to the selection contact 83a of the switch 83. Also, switch 7
In the attached information data processing unit 78 to which the audio information data DRI through 6 is supplied, the synchronization data, the ID code and the audio auxiliary data included in the audio information data DRI are taken out, and these are made into the attached information data Drp, It is supplied to the selection contact 83b of the switch 83.

The switch 83 is controlled by the control signal C4 sent from the control signal forming section 66, and the control signal C
4, the movable contact 83c is connected to the selection contact 83a and the auxiliary information data Dap is derived to the movable contact 83c, or the movable contact 83c is the selection contact 83b.
Information data Drp attached to the movable contact 83c.
Is derived. The attached information data Dap or the attached information data Drp derived to the movable contact 83c of the switch 88 is the movable contact 8 of the switch 82.
2b is supplied.

The switch 82 is controlled by the control signal C5 sent from the control signal forming section 66, and the control signal C
In accordance with 5, the movable contact 82c is connected to the selection contact 82b, the auxiliary information data Dap or the additional information data Drp is derived to the movable contact 82c, and subsequently, the movable contact 82c is connected to the selection contact 82a, Moving contact 8
The state in which the audio data DAW is derived to 2c is set for each data synchronization block in the audio data DAW. As a result, in the switch 82, the attached information data Dap or the attached information data Dr for each data synchronization block in the audio data DAW.
The sync data based on p, the ID code, and the audio auxiliary data are added to form a data sync block. Then, the audio information data DAX formed including a series of such data synchronization blocks is
The audio information data DAX ′ is output to the output terminal section 84, and the timing adjustment section 85 outputs the timing-adjusted audio information data DAX ′ to the output terminal section 86.

In this way, the audio information data DAX 'obtained from the editing section 40 is supplied to the selection contact 37b of the switch 37 in the example shown in FIG. In the switch 37, the movable contact 37c is connected to the selection contact 37a according to the control signal CS supplied thereto, and the outer parity error correction unit 3 is connected to the movable contact 37c.
5 is derived from the audio information data DAO, or the movable contact 37c is connected to the selection contact 37b and the movable contact 37c is derived from the audio information data DAX ′ obtained from the edit section 40. Be done.

The audio information data DAO or the audio information data DAX ′ led to the movable contact 37c of the switch 37 is supplied to the deinterleave processing section 90. In the deinterleave processing unit 90, the audio data included in the audio information data DAO or the audio information data DAX ′ is defined as a unit of audio data in one frame of the audio information data DAO or the audio information data DAX ′. , Deinterleave processing is applied to the interleaved data segment,
As a result, the audio data DAD having the original arrangement of the data segments can be obtained. In this way, the audio data DAD obtained from the deinterleave processing unit 90 is converted into an analog audio signal SA by the D / A conversion unit 91, and the audio signal SA is amplified by the output amplification unit 92 and reproduced. Audio signal output terminal 93 as audio signal SAO
Be derived to.

The audio information data DAX obtained from the editing section 40 is the outer parity adding section 9
5 is supplied. And audio information data DAX
Is added with the outer parity in the outer parity adding section 95, and is further added with the inner parity in the inner parity adding section 96 to form the edit audio information data DDZ. From 96, edit audio information data DDZ is obtained. Then, the edit audio information data DDZ is supplied to the recording rotary magnetic head 98 through the recording amplifying section 97, and the recording rotary magnetic head 98 causes the area AD of each of the plurality of inclined recording tracks TK on the magnetic tape TP to be recorded. The audio information data, which is the source of the audio data DAA provided for the data replacement by the audio data DRA in the editing unit 40, is recorded in the recording part.

The reading rotary magnetic head 31 and the recording rotary magnetic head 98 are similar to the read rotary magnetic head 11 and the recording rotary magnetic head 28 shown in FIGS. 10 and 11, respectively. It is placed under the arrangement and rotated.

In the digital information recording / reproducing apparatus according to the present invention, the editing operation mode in which the editing audio information data DDZ is recorded on the magnetic tape TP by the recording rotary magnetic head 98 in this manner is provided. Is audio data composed of interleaved data segments obtained from the digital composite data DTT read from the magnetic tape TP by the reading rotary magnetic head 31 and subjected to error correction processing for code errors. In forming the edit audio information data DDZ from the included audio information data DAQ and the other audio information data DRI including audio data composed of interleaved data segments, the audio information data DAQ Audio information data DR is in La
Deinterleaving processing for I is not performed, and audio information data DAQ and audio information data DRI
Of the digital composite data DT, since each of them is subjected to the processing under the condition including the audio data composed of the interleaved data segment.
Editing audio information data DD corresponding to the audio information data DAQ based on the reading of T
The data processing time required until Z is supplied to the recording rotary magnetic head 98 is relatively short.

The editing audio information data DDZ
The error correction process for the code error in obtaining the error is limited to the process required to obtain the error-corrected audio information data DAQ. The data processing time required until the editing audio information data DDZ corresponding to the base audio information data DAQ is supplied to the recording rotary magnetic head 98 is further shortened.

Therefore, the read rotary magnetic head 31 and the write rotary magnetic head 98 are arranged in the same manner as the read rotary magnetic head 11 and the write rotary magnetic head 28 shown in FIGS. 10 and 11, respectively. In this case, the recording rotary magnetic head 98 can properly and surely record the editing audio information data DDZ at the target position on the magnetic tape TP.

In the above example, the data replacing process for replacing the audio information data DAA in the editing section 40 with the audio information data DRA is
A crossfade process in which the audio data DAA gradually decreases and disappears and the audio data DRA gradually increases, and the subsequent audio data DRA gradually decreases and disappears, and the audio data DAA gradually increases. However, in the digital information recording / reproducing apparatus according to the present invention, instead of such cross-fade processing, audio data DA is used.
Along with the fade-out process for A and the subsequent fade-in process for the audio data DRA, and the subsequent fade-out process for the audio data DRA and the subsequent fade-in process for the audio data DAA, the audio information in the edit unit 40 A data replacement process for replacing the data DAA with the audio information data DRA may be performed.

[0074]

As is apparent from the above description, in the digital information recording / reproducing apparatus according to the present invention, the plurality of data segments in the first digital data and the first coefficient data by the first multiplication unit are used. In a plurality of coefficient data segments in the plurality of coefficient data segments in the second digital data and a plurality of coefficient data segments in the second coefficient data by the second multiplication unit. Multiplication processing for mutually corresponding ones, and
The addition process of adding the output data from the first multiplication unit to the output data from the second multiplication unit by the data addition unit is performed by the interleaving process of the plurality of data segments that the first digital data forms. And the second digital data is in a state in which the second digital data is interleaved with respect to a plurality of data segments constituting the second digital data. Thereby,
From the time when the first digital data having the plurality of interleaved data segments is read from the recording medium by the data reading unit, the addition obtained from the data addition unit corresponding to the first digital data Addition output obtained from the data addition unit, which is regarded as editing digital data, because the data processing time required until the editing digital data obtained as output data is supplied to the data recording unit is set to a relatively short time. The data can be properly recorded at the position where the first digital data supplied to the first multiplication unit of the recording medium is read by the data reading unit.

Therefore, when the digital information recording / reproducing apparatus according to the present invention constitutes a digital VTR, the audio information data included in the digital composite data representing the television signal recorded on the magnetic tape is recorded. , It is possible to properly carry out editing such as replacement of a part of it with another audio information data.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing a specific configuration example of an edit unit in a digital information recording / reproducing apparatus according to the present invention.

FIG. 2 is a block connection diagram schematically showing an example of a digital information recording / reproducing apparatus according to the present invention.

FIG. 3 is a time chart provided for explaining the operation of a specific configuration example of the edit unit shown in FIG.

FIG. 4 is a time chart used for explaining the operation of a specific configuration example of the edit unit shown in FIG.

FIG. 5 is a conceptual diagram showing an example of a recording format of a magnetic tape used with a digital VTR.

FIG. 6 is a conceptual diagram showing an example of a coding format of audio information data recorded on a magnetic tape by a digital VTR.

FIG. 7 is a conceptual diagram showing an example of a data format of audio data recorded on a magnetic tape by a digital VTR.

FIG. 8 is a block connection diagram showing a recording / reproducing system that is usually proposed as having a data editing function.

9 is a time chart used for explaining the operation of the recording / reproducing system shown in FIG.

FIG. 10 is a conceptual diagram schematically showing an arrangement of rotary magnetic heads for reading and recording in a digital VTR.

FIG. 11 is a conceptual diagram schematically showing an arrangement of rotary magnetic heads for reading and recording in a digital VTR.

[Explanation of symbols]

31 read rotary magnetic head 34 inner parity error correction unit 35 outer parity error correction unit 36, 39
Audio outer parity error correction unit 3
8 Audio inner parity error correction unit 40 Edit unit 42 A / D conversion unit 4
3 Interleave processing unit 44 Control block
52,75 serial-parallel converter 53
Data memory section 54 Frame start edge detection section
55 write control signal forming unit 57 byte count unit 60 read control signal forming unit 61 sync block counting unit 62 track count unit 63 coefficient data memory unit 66 control signal forming unit 72, 77 audio data processing unit 7
3,78 Attached information data processing unit 74,79 Multiplication unit 80 Data addition unit 81 Limiter unit
90 Deinterleave processing unit 91 D / A
Conversion unit 95 Outer parity addition unit 96
Inner parity addition unit 98 Recording rotary magnetic head

Claims (12)

[Claims] 1. A data reading unit for reading digital composite data from a recording medium, and a plurality of interleaved data segments of the digital composite data read by the data reading unit, the auxiliary information data A memory means to which the added first digital data is supplied, and a write control signal based on attached information data representing period information of the first digital data are formed, and the write control signal is generated in accordance with the write control signal. The memory means includes a memory write control unit that causes an operation of writing a plurality of data segments in the first digital data according to an interleave processing state, and a plurality of interleaved data segments. Data supply for supplying second digital data to which data is added A first coefficient data including a plurality of coefficient data segments respectively corresponding to a plurality of data segments in the first digital data, and a plurality of data segments in the second digital data from the data supply unit. A coefficient data memory means storing second coefficient data including a plurality of corresponding coefficient data segments, and an arrangement state of the plurality of data segments in the second digital data based on the second digital data. A corresponding read control signal is formed, and a plurality of data segments in the first digital data is sequentially read from the memory means according to the read control signal, and at the same time the first and the second data from the coefficient data memory means are read out. A plurality of coefficient data segment for each of the second coefficient data Memory read control section for causing the operation of sequentially reading the data, a plurality of data segments in the first digital data read from the memory means and the first coefficient read from the coefficient data memory means. A plurality of coefficient data segments in the data, a first multiplication unit that performs a multiplication process on mutually corresponding ones, a plurality of data segments in the second digital data from the data supply unit, and the coefficient data memory means A second multiplying unit that performs a multiplying process on mutually corresponding ones of the plurality of coefficient data segments in the second coefficient data read from the output data from the first multiplying unit; A data addition unit for adding to the output data from the second multiplication unit, and the data addition unit A digital recording unit configured to record the addition output data at a position where the first digital data supplied to the first multiplying unit in the recording medium is read by the data reading unit. Recording / playback device. 2. The digital information recording / reproducing apparatus according to claim 1, further comprising error correction means for correcting a code error in the digital composite data read by the data reading section. 3. An overall error correction unit for performing an overall error correction on the digital composite data read by the data reading unit, and an error correction required for the first digital data. 3. The digital information recording / reproducing according to claim 2, further comprising: a partial error correction unit for performing the above, and the first digital data subjected to code error correction by the partial error correction unit is supplied to the memory means. apparatus. 4. The first digital data is data to which an inner parity and an outer parity are added, and the partial error correction unit corrects a code error detected by the inner parity of the first digital data. 4. The inner parity error correction unit for performing the above, and the outer parity error correction unit for correcting the code error detected by the outer parity for the first digital data. Digital information recording / reproducing device. 5. A data reading unit for reading digital composite data from a recording medium, and a plurality of interleaved data segments of the digital composite data read by the data reading unit, the auxiliary information data being included. Error correction means for correcting the code error of the added first digital data, and first error correction means for correcting the code error by the error correction means.
Memory means to which the digital data of the first digital data is supplied, and a write control signal based on attached information data representing period information of the first digital data are formed, and the memory means is provided with the first control signal according to the write control signal. A memory write control unit that causes an operation of writing a plurality of data segments in one digital data according to an interleave processing state, and a plurality of data segments that have been interleaved, Data supplying section for supplying two digital data, first coefficient data including a plurality of coefficient data segments respectively corresponding to the plurality of data segments in the first digital data, and the first coefficient data from the data supplying section. 2 corresponding to a plurality of data segments in the digital data. Coefficient data memory means storing second coefficient data including the coefficient data segment, and read control according to the arrangement state of the plurality of data segments in the second digital data based on the second digital data. Forming a signal and sequentially reading a plurality of data segments in the first digital data from the memory means according to the read control signal, and at the same time, the first and second coefficient data from the coefficient data memory means. , A memory read control unit for causing an operation of sequentially reading a plurality of coefficient data segments, a plurality of data segments in the first digital data read from the memory means, and a read from the coefficient data memory means. Plural coefficient data in the issued first coefficient data A first multiplication unit for performing a multiplication process on mutually corresponding ones in the segment; a plurality of data segments in the second digital data from the data supply unit; and a first data unit read from the coefficient data memory means. A second multiplication unit that performs a multiplication process on mutually corresponding ones of a plurality of coefficient data segments in the second coefficient data; and output data from the first multiplication unit from the second multiplication unit. The data addition unit for adding the output data and the addition output data obtained from the data addition unit are supplied to the first multiplication unit in the recording medium, and the first digital data is read by the data reading unit. A digital information recording / reproducing apparatus comprising a data recording section for recording at a position. 6. The first digital data is data to which an inner parity and an outer parity are added, and an error correction unit corrects a code error detected by the inner parity for the first digital data. 6. An inner parity error correction unit for performing the above, and an outer parity error correction unit for performing correction of a code error detected by the outer parity for the above-mentioned first digital data are included.
The described digital information recording / reproducing apparatus. 7. The parity addition means for adding a parity for detecting a code error to the addition output data obtained from the data addition section is provided.
The described digital information recording / reproducing apparatus. 8. The parity adding means comprises an inner parity adding section for adding inner parity to the addition output data obtained from the data adding section, and an outer parity adding section for adding outer parity to the addition output data. The digital information recording / reproducing apparatus according to claim 7, wherein 9. When reading a plurality of coefficient data segments in each of the first and second coefficient data from the coefficient data memory means, a read start time point of the plurality of coefficient data segments in the first coefficient data and The reading start time points of the plurality of coefficient data segments in the second coefficient data are determined in correspondence with the predetermined cycle in the first digital data, and are set to correspond to the plurality of data segments in the first digital data in the first multiplication unit. Multiplication processing of mutually corresponding ones in a plurality of coefficient data segments in the first coefficient data, and a plurality of data segments in the second digital data and a plurality of second coefficient data in the second multiplication unit Mutual counterparts in the coefficient data segment of For multiplication processing of the digital information recording and reproducing apparatus according to claim 1 or 5, wherein the control unit performs control to start from the beginning of the predetermined period in the first digital data is provided. 10. The first and second coefficient data memory means are provided.
When a plurality of coefficient data segments in each of the coefficient data are read, a read start time of the plurality of coefficient data segments in the first coefficient data and a read start of the plurality of coefficient data segments in the second coefficient data A time point is changed, and a multiplication process is performed between the plurality of data segments in the first digital data and the plurality of coefficient data segments in the first coefficient data, which correspond to each other, in the first multiplication unit; In the multiplication unit, the multiplication processing is performed on the plurality of data segments in the second digital data and the plurality of coefficient data segments in the second coefficient data that correspond to each other.
6. The digital information recording / reproducing apparatus according to claim 1 or 5, further comprising a control unit for performing control to start the digital data in the middle of a predetermined cycle. 11. A multiplication process for a plurality of data segments in the first digital data and a plurality of coefficient data segments in the first coefficient data, which correspond to each other in the first multiplication unit, and a second process.
The multiplication processing of the plurality of data segments in the second digital data and the plurality of coefficient data segments in the second coefficient data that correspond to each other in the multiplication unit The cross-fading process is performed on the output data from the first multiplication unit and the output data from the second multiplication unit, and is obtained. 10. A digital information recording / reproducing apparatus according to item 10. 12. Multiplication processing for mutually corresponding ones of a plurality of data segments in the first digital data and a plurality of coefficient data segments in the first coefficient data in the first multiplication unit, and a second
The multiplication processing of the plurality of data segments in the second digital data and the plurality of coefficient data segments in the second coefficient data that correspond to each other in the multiplication unit converts the addition output data obtained from the data addition unit. A fade-out process for output data from the first multiplication unit and a fade-in process for output data from the second multiplication unit;
6. A fade-out process for output data from the second multiplication unit and a fade-in process for output data from the first multiplication unit are obtained. 9. A digital information recording / reproducing apparatus according to 9 or 10.