JPH09282804A - Digital data processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately perform de-interleave processing by producing an array position of each of data segments, in which data should be put when de-interleave processing is performed. SOLUTION: Audio data stored in a data memory section 30 is read in condition that data segments are processed by de-interleaving through a read address signal generating section 37 forming a read control section. As a result, interleave processed data segments, constituting the audio data which is main information data of audio information data DA, are processed by de-interleaving.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of data segments which are interleaved with respect to digital data composed of a plurality of data segments which are interleaved in a predetermined data section. The present invention relates to a digital data processing device that performs the deinterleave processing of

[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. 7, tilted recording tracks in which digital composite data obtained by analog / digital conversion (A / D conversion) of one frame of a television signal are sequentially formed on the magnetic tape TP. It is distributed and recorded to 10 adjacent TKs in sequence. Such recording is performed by scanning the magnetic tape TP by the rotary magnetic head to which digital composite data is supplied, as shown in FIG.
The arrows DY and DH in FIG.
The traveling direction of P and the scanning direction of the rotary magnetic head with respect to the magnetic tape TP are shown.

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 is a main part complies with a coding format as shown in FIG. 8, 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 main information data. It is configured as certain audio data, and an inner parity of 8 bytes (byte position number j is 82 to 89) is added to the audio data. The ID code provides track pair information corresponding to the numbers of two inclined recording tracks adjacent to each other, head azimuth information regarding the head azimuth regarding the magnetic head related to each inclined recording track, information regarding the synchronization block number i, and the like. Also, the audio auxiliary data provides information on the recording conditions of the audio data including the number of constituent bits and the like. The ID code and the audio auxiliary data are included in the auxiliary information data added to the audio data which is the main information data, including the synchronization data.

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 number i is 2 to 10 is 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. 9, these data segments are from the first one in the data synchronization block whose synchronization block number i is 2 to the last one in the data synchronization block whose synchronization block number i is 10. For example, it appears with consecutive segment numbers of D0 to D323.

However, in the audio information data actually recorded in the area AD of each tilted recording track TK, for example, ten tilted recording tracks TK are used.
Interleaving processing is performed on a large number of data segments in order to reduce code errors in units of audio data in the entire audio information data for one frame which is dispersed and recorded in. 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 data forming each of the audio data having the synchronization block number i of 2 to 10 are recorded. The segment is
These segment numbers are not arranged in order, but are arranged according to the interleave processing.

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 shown by hatching in FIG. 8, 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, the audio information data recorded in the area AD by the rotary magnetic head from each of the tilted recording tracks TK which are formed on the magnetic tape TP as described above by the digital VTR. In reading the digital composite data including the, and obtaining the reproduction television signal based on the digital composite data, in reproducing the audio signal, in addition to performing the code error correction process on the audio information data, It is necessary to perform deinterleaving processing on a number of interleaved data segments that make up the included audio data. The interleaving process for the audio data included in the audio information data recorded in the area AD of each tilted recording track TK is performed by, for example, the entire audio information data for one frame distributed and recorded in ten tilted recording tracks TK. , The deinterleave processing is performed on a large number of interleaved data segments forming the audio data, for example, for one frame read from ten inclined recording tracks TK. It is performed in units of audio data in the audio information data.

Regarding the deinterleave processing for a large number of interleaved data segments forming such audio data, in the conventionally proposed digital VTR, the data memory means is prepared and the data memory is provided. A large number of interleaved data segments that make up the audio data are sequentially written and stored in the means while maintaining the order under which the interleaved processing was performed, and the data stored in the data memory means When the number of segments reaches one frame, the one-frame data segment is read from the data memory means, and at this time, the one-frame data segment read from the data memory means is rearranged. The data segment for that one frame Doo is released from a state in which interleave processing is performed, it is intended to de-interleave processing is performed.

In such a deinterleave process, the start of each frame is detected and the start or end of each tilted recording track TK is detected according to the scanning condition of the rotary magnetic head with respect to the tilted recording track TK on the magnetic tape TP. Each tilted recording track T that is detected and made
Audio information data read from the tilted recording track TK on the magnetic tape TP is detected by detecting the track number, which is a number in 10 tilted recording tracks TK from which one frame of audio information data for K is read. Byte position number detection, sync block number detection, etc. are performed based on the above. Then, the information regarding the detected start end of each frame, and further the detected byte position number, sync block number, track number, etc. are rearranged for each one-frame data segment sequentially read from the data memory means. Be used for.

[0013]

As described above, in the digital VTR, the reproducing operation mode in which the digital composite data is read from the tilted recording tracks TK formed in the magnetic tape TP by the rotary magnetic head in a large number is arranged. In this case, not only the normal reproduction operation mode state in which the running speed of the magnetic tape TP is the same as the running speed of the magnetic tape TP at the time of recording,
A variable speed reproduction operation mode state (JOG reproduction mode state) in which the traveling speed of the magnetic tape TP is slower than the traveling speed of the magnetic tape TP, for example, the traveling speed of the magnetic tape TP is the traveling speed of the magnetic tape TP during recording. Generally, the 1/5 times speed reproduction operation mode state, which is set to 1/5 of the above, is also selectively taken.

When the digital VTR is in the normal reproduction operation mode state,
Since the rotary magnetic head sequentially scans each of the tilted recording tracks TK formed on the magnetic tape TP from the start end to the end, the tilted recording tracks T are recorded.
Detection of the start end of each frame and detection of the track number, which are performed according to the scanning condition of the rotary magnetic head with respect to K, are sequentially performed appropriately, and further based on the audio information data read from the inclined recording track TK on the magnetic tape TP. Detection of all byte position numbers and synchronization block numbers are also properly performed sequentially. Therefore, regarding a large number of interleaved data segments provided with information about the detected start of each frame, and further, the detected byte position number, sync block number, track number, etc. For the deinterleaving process of 1), the rearrangement of each of the data segments of one frame sequentially read from the data memory means is properly performed.

However, in the digital VTR, the running speed of the magnetic tape TP is slower than the running speed of the magnetic tape TP at the time of recording, for example, in the JOG reproduction mode state, for example, the running speed of the magnetic tape TP is at the time of recording. Under the 1/5 speed reproduction operation mode state, which is 1/5 of the traveling speed,
The rotary magnetic head is not in a state where it sequentially scans each of the tilted recording tracks TK formed in a large number on the magnetic tape TP from the start end to the end thereof, and partially scans each tilted recording track TK repeatedly. Therefore, the start of each frame is not properly detected according to the scanning condition of the rotary magnetic head with respect to the tilted recording track TK, and further,
Track number detection or sync block number detection is no longer the situation in which track numbers or sync block numbers are sequentially detected. As a result, information about the start of each detected frame, as well as a number of interleaved data segments provided with the detected byte position number, sync block number, track number, etc. Therefore, the rearrangement of the data segments for one frame, which are sequentially read from the data memory means, for the deinterleaving process is not properly performed.

In view of the above point, the present invention receives digital data in which auxiliary information data is added to main information data composed of a plurality of interleaved data segments and is added to the main information data. When performing deinterleave processing on a plurality of interleaved data segments that compose the main information data by using the attached information data, a large number of digital data were formed on the magnetic tape by the rotating magnetic head. In the case where a digital VTR for reading digital data from an inclined recording track is obtained under the JOG reproduction mode state in which the running speed of the magnetic tape is slower than the running speed of the magnetic tape during recording. The main information data in the digital data Deinterleaving the plurality of data segments interleaving processing has been performed for forming, to provide a digital data processing apparatus will be able to properly perform.

[0017]

In a digital data processing device according to the present invention, auxiliary information data is added to main information data composed of a plurality of data segments which are interleaved in a predetermined data section. In the digital data formed, at least the main information data is written in the data memory section, and the write address control signal is formed based on the count value and the additional information data regarding the plurality of data segments forming the main information data, The write address control signal is used to control the write address for the main information data in the data memory unit, and the main information data is deinterleaved for a plurality of interleaved data segments. Write control unit to be stored in the memory unit , From the data memory unit, and a main information data stored in it, and a read control unit which forms a state of deinterleaving for a plurality of data segments are read in a state of being subjected.

In the digital data processing apparatus according to the present invention configured as described above, the deinterleaving process for a plurality of interleaved data segments forming the main information data in the digital data is performed. The write control unit performs deinterleaving processing for each of the plurality of data segments forming the main information data based on the count value of the plurality of data segments forming the main information data and the attached information data accompanying the main information data. A plurality of interleaved components that form the main information data are calculated under the condition that the array position to be taken at the time of application is calculated and the write address control is performed with the write address control signal formed accordingly. Writing to the data memory section for each data segment It is made. As a result, the main information data is stored in the data memory unit in a state where deinterleave processing has been performed on the plurality of interleaved data segments. Then, in such a state, the main information data stored in the data memory unit is read by the read control unit in a state where deinterleave processing is performed on a plurality of data segments. As a result, the deinterleaving process is performed on the plurality of data segments that have been subjected to the interleaving process that form the main information data.

By doing so, according to the digital data processing apparatus of the present invention, the auxiliary information data is added to the main information data composed of a plurality of interleaved data segments. JOG reproduction in which the running speed of the magnetic tape is slower than the running speed of the magnetic tape at the time of recording in a digital VTR that performs an operation of reading digital data from inclined recording tracks in which a large number of data are formed on the magnetic tape by a rotating magnetic head. Even when it is obtained under the mode state, it is possible to properly perform deinterleaving processing for a plurality of interleaved data segments forming the main information data in the digital data. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the essential parts of a digital VTR to which an example of a digital data processing device according to the present invention is applied. The digital VTR shown in FIG. 1 is
It is assumed that the digital composite data is read from the recording medium on which the digital composite data representing the television signal is recorded, and the operation of reproducing the television signal based on the read digital composite data is performed.
Is used with the magnetic tape TP in which inclined recording tracks TK are formed in an array as shown in FIG.

In the digital VTR shown in FIG. 1, a reading rotary magnetic head unit 21 is provided. The read rotary magnetic head unit 21 includes, for example, four read rotary magnetic heads 21a, 21b, 21c, and 21d, and these four read rotary magnetic heads 21a to 2a.
As shown in FIG. 2, 1d is designed to scan four adjacent adjacent ones of a large number of inclined recording tracks TK arranged and formed on the magnetic tape TP substantially at the same time, respectively. The digital composite data recorded on the tilt recording track TK is read. Each of the reading rotary magnetic heads 21a to 21d has a head azimuth corresponding to the head azimuth of the rotary magnetic head at the time of recording on the inclined recording track TK for reading digital composite data. Is the head azimuth of the magnetic head associated with each inclined recording track TK. Then, the reading rotary magnetic head 21a
21d are two inclined recording tracks TK adjacent to each other.
Two digital composite data are read from each, namely,
Reading rotary magnetic head 21a and reading rotary magnetic head 2
1b, the read rotary magnetic head 21b and the read rotary magnetic head 21c, and the read rotary magnetic head 21c and the read rotary magnetic head 21d have different head azimuths.

From the read rotary magnetic head unit 21, digital composite data DT read from the inclined recording tracks TK on the magnetic tape TP by each of the read rotary magnetic heads 21a to 21d is obtained. This digital composite data DT contains video information data, audio information data and other data. The audio information data includes audio data which is the main information data according to the coding format as shown in FIG. 8, synchronization data which is additional information data added to the audio data, and an ID code. The audio data is composed of an array of a large number of data segments which are interleaved in units of one frame.

The digital composite data DT obtained from the reading rotary magnetic head unit 21 is amplified by the reproduction / amplification unit 22, and is passed through the equalizer unit 23 to the data rearranging unit 24.
Is supplied to. In the data rearrangement section 24, the digital composite data DT is recorded in a distributed manner on ten inclined recording tracks TK which are successively adjacent to each other on the magnetic tape TP.
The digital data DF representing the television signals for the frames are rearranged so as to be sequentially formed. The digital data DF obtained from the data rearrangement unit 24 is supplied to the coding unit 25, and is subjected to the coding required for forming independent data of one channel,
The coded digital data DC is supplied to the error correction / time axis correction unit 26.

In the error correction / time base correction unit 26, regarding each of the video information data and the audio information data included in the coded digital data DC, the code error detected by the inner parity and the outer parity of the video information data and the audio information data is contained. Error correction processing and time base correction are performed, and video information data and audio information data are separated. And
The error correction / time axis correction unit 26 derives the video information data DV that has been subjected to the error correction processing and the time axis correction, and the audio information data DA that has been subjected to the error correction processing.

The video information data DV obtained from the error correction / time axis correction unit 26 is supplied to a video information data processing unit not shown in FIG. On the other hand, the audio information data DA obtained from the error correction / time axis correction unit 26 is supplied to the deinterleave processing unit 27 which is an example of the digital data processing device according to the present invention.

In the deinterleave processing unit 27,
Audio information data DA obtained from the error correction / time axis correction unit 26 is a random access memory (RAM).
Is supplied to the data memory unit 30 formed by the above, and is also supplied to each of the byte count unit 31, the synchronization block number detection unit 32, and the track number detection unit 33.

The byte count unit 31 counts each byte data, which is represented by the sync block number i and the byte position number j in the audio information data DA. If the byte data is included in the audio data in the audio information data DA, two bytes represented by the two byte position numbers j form each of a large number of data segments forming the audio data. There is. Therefore, for example, the count value for the byte data in each data synchronization block represents the array position of each of the multiple data segments that make up the audio data. Then, the byte count unit 31 obtains a byte count output signal SBC representing the count result of the byte data.

In the sync block number detector 32, the sync block number i represented by the ID code in the audio information data DA is detected, and the sync block number detection output signal SSD representing the detected sync block number i is obtained. .

Further, in the track number detector 33, the head represented by the track pair number represented by the track pair information included in the ID code in the audio information data DA and the head azimuth information represented by the ID code in the audio information data DA. Azimuth is obtained, and further, based on the obtained track pair number and head azimuth, the inclination of the inclined recording track TK from which the audio information data DA supplied to the deinterleave processing unit 27 is read out. The track number, which is the number within one frame of the recording track TK, is detected, and the track number detection output signal STD representing the detected track number is obtained.

The track pair number represented by the track pair information is the two mutually adjacent tilt recordings on the magnetic tape TP including the tilt recording track TK from which the audio information data DA supplied to the deinterleave processing unit 27 is read. It is the number of the inclined recording track TK including the track TK within one frame. The track pair information is, for example, 4-bit data consisting of bits b0, b1, b2 and b3, and the relationship with the track pair number represented by it is as shown in FIG. 3, for example. That is, the four bits b0 to b3 forming the track pair information are code 00000011,0.
010, 0011 and 0100 have track pair numbers of track 0 and 1, track 2 and 3, track 4 and 5, track 6 and 7, and track 8 and 9.
To represent.

The head azimuth represented by the head azimuth information is the head azimuth of the magnetic head related to the inclined recording track TK from which the audio information data DA supplied to the deinterleave processing unit 27 is read. The head azimuth information is, for example, bit b0.
Data having a 1-bit structure, and the relationship with the head azimuth represented by the data is as shown in FIG. 4, for example. That is, when 1 bit b0 forming the head azimuth information is 0, it represents the head azimuth α, and when it is 1, it represents the head azimuth β.

The track number detecting section 33, specifically,
For example, it is configured as shown in FIG. In the specific example of the track number detecting unit 33 shown in FIG. 5,
The audio information data DA from the terminal 51 is converted into the track pair information detecting section 52 and the head azimuth information detecting section 5
It is supplied to each of the three. Further, the track pair information detector 52 and the head azimuth information detector 53 have terminals 5
The start pulse PS through 4 and the clock signal CP through the terminal 55 are also supplied.

As shown in FIG. 6, the start pulse PS is a pulse having a leading edge synchronized with the start end of the ID code forming each data synchronization block in the audio information data DA, and is applied to the terminal 54 with the data synchronization block period. To come. The clock signal CP is an operation clock signal for each unit in the deinterleave processing unit 27. Then, each of the track pair information detection unit 52 and the head azimuth information detection unit 53 has a start pulse P.
The track pair information detecting section 52 operates in response to both the S and the clock signal CP, and detects the track pair information included in the ID code forming each data synchronization block in the audio information data DA, and the head azimuth information. IDs forming each data synchronization block in the audio information data DA by the detection unit 53
The head azimuth information included in the code is detected.

In the track pair information detector 52,
A track pair number represented by the detected track pair information is obtained, a track pair number detection output signal STP corresponding to the track pair number is formed, and the track pair number detection output signal STP is formed.
Is supplied to. Further, in the head azimuth information detection unit 53, the head azimuth representing the detected head azimuth information, that is, the head azimuth α or β is obtained, and the corresponding head azimuth detection output signal SHA is obtained.
Is formed and is supplied to the track number determination unit 56.

In the track number discriminating unit 56, the audio information supplied to the deinterleave processing unit 27 based on the track pair number represented by the track pair number detection output signal STP and the head azimuth represented by the head azimuth detection output signal SHA. For the tilted recording track TK from which the data DA has been read, the track number which is the number within one frame of the tilted recording track TK including it is determined, and the track number is detected accordingly. Then, a track number detection output signal S representing the detected track number
The TD is led to the terminal 57 from the track number discrimination section 56.

In this way, the byte count output signal SBC obtained from the byte count unit 31, the synchronous block number detection output signal SSD obtained from the synchronous block number detection unit 32, and the track number obtained from the track number detection unit 33. The detection output signal STD is supplied to the write address signal forming unit 34. In the write address signal forming section 34, the count result of the byte data represented by the byte count output signal SBC, the synchronization block number represented by the synchronization block number detection output signal SSD, and the track number represented by the track number detection output signal STD are displayed. Based on this, the array position to be taken when the deinterleave processing is performed is calculated for each of the interleaved data segments forming the audio data in the audio information data DA. Then, in the write address signal forming unit 34, a write address control signal CW that corresponds to the calculated array position is further formed, and the write address control signal CW is stored in the data memory unit. Is supplied to 30.

As a result, the data memory unit 30 is interleaved in units of one frame which constitutes audio data in the audio information data DA supplied from the error correction / time axis correction unit 26. A plurality of data segments are written under the write address control according to the write address control signal CW. As a result, the audio data, which is the main information data in the audio information data DA, is in a state where deinterleave processing is performed on the plurality of data segments that have been subjected to the interleaving processing, and are stored in the data memory unit 30. Will be stored.
Then, the write address control signal C is applied to the data memory unit 30.
The write address signal forming unit 34 that supplies W forms a write control unit for the data memory unit 30.

At this time, the byte count output signal SB
C, the sync block number detection output signal SSD, and the track number detection output signal STD are deinterleave processing unit 2
When the audio information data DA supplied to 7 is obtained under the condition that the digital VTR is in the normal reproduction operation mode, and the traveling speed of the magnetic tape TP is made slower than the traveling speed of the magnetic tape TP at the time of recording. In any of the cases of being obtained under the JOG reproduction mode state, for example, in the 1/5 speed reproduction operation mode state, the byte count unit 31, the synchronization block number detection unit 32, and the track number detection unit 33 respectively Obtained properly. Therefore, when the write address control signal CW is formed, the count result for the byte data represented by the byte count output signal SBC, the synchronization block number represented by the synchronization block number detection output signal SSD, and the track number detection output signal STD are represented. Audio information data DA that is performed based on the track number
The calculation of the array position to be performed when the deinterleave processing is performed for each of the plurality of interleaved data segments that configure the audio data in However, it can be obtained when the digital VTR is obtained in the normal reproduction operation mode and in the JOG reproduction mode in which the running speed of the magnetic tape TP is slower than the running speed of the magnetic tape TP at the time of recording. In any case, it will be carried out properly.

That is, in the deinterleave processing unit 27, the audio information data DA supplied to it is
In the case where the digital VTR is obtained under the normal reproduction operation mode, and when it is obtained under the JOG reproduction mode in which the traveling speed of the magnetic tape TP is slower than the traveling speed of the magnetic tape TP at the time of recording. In any case, the audio data, which is the main information data in the audio information data DA, is deinterleaved for the plurality of interleaved data segments forming the data memory unit. The state stored in 30 is properly and surely obtained.

Then, in the deinterleave processing unit 27, the clock signal CP is supplied to the clock counting unit 36 through the terminal 35, and the clock counting unit 36 obtains the count output data DCC representing the counting result for the clock signal CP. . The count output data DCC is supplied to the read address signal forming unit 37, and in the read address signal forming unit 37, a large number of data segments forming the audio data stored in the data memory unit 30 are output according to the count output data DCC. A read address control signal CR for sequentially reading in the address order in the data memory unit 30 is formed and supplied to the data memory unit 30.

As a result, a large number of data segments constituting one frame of audio data sequentially stored in the data memory unit 30 are set for their read addresses according to the read address control signal CR. Then, the data will be sequentially read. In this way, the audio data read from the data memory unit 30 in units of one frame is the deinterleaved audio data in which the data segments forming the data are deinterleaved and have a regular array order. Then, the read audio data DQ in which one frame is successively formed is formed. The read address signal forming unit 37 that supplies the read address control signal CR to the data memory unit 30 forms a read control unit for the data memory unit 30.

The audio data stored in the data memory unit 30 as described above is read in a state in which the read address signal forming unit 37 forming the read control unit has performed deinterleave processing on a plurality of data segments. As a result, the deinterleaving process is performed on the plurality of interleaved data segments forming the audio data that is the main information data in the audio information data DA.

In this way, the deinterleave processing unit 2 which constitutes an example of the digital data processing device according to the present invention.
The read audio data DQ, which is the deinterleaved audio data obtained from the data memory unit 30 in FIG. 7, is supplied to the conceal processing unit 41.
In the concealment processing unit 41, when the supplied read audio data DQ includes a missing portion for the data segment constituting the read audio data DQ, two data segments obtained immediately before and after the missing portion in the read audio data DQ. Represents an average value of the respective values, that is, a binary interpolation data segment based on two data segments obtained before and after the missing portion is formed, and the missing portion is filled with the binary interpolation data segment. Data concealment processing is performed. Then, the concealment processing unit 41 sends out the audio data DQN ′ in which the missing portions of the data segment are filled.

When the read audio data DQ supplied to the concealment processing unit 41 does not include a missing portion for the data segment forming the read audio data DQ, the read audio data DQ remains as it is.
It is sent out from the conceal processing unit 41 as N ′.

The audio data DQN 'obtained from the conceal processing unit 41 is supplied to the JOG data calculation unit 42. The JOG data calculation unit 42 forms a data interpolation processing unit, and the audio data DQ read from the data memory unit 30 is in the JOG reproduction mode state, for example, 1
When the / 5 × speed reproduction operation mode state is obtained, for each set of two data segments adjacent to each other in the audio data DQN ′ from the conceal processing unit 41, two data forming each set. Interpolation values according to the values represented by two data segments, respectively, between the segments, the number corresponding to the contents of the JOG reproduction mode at that time, for example, only four in the case of the 1/5 speed reproduction operation mode. The interpolated data segment formed to represent the above is subjected to a calculation process that is arranged at equal time intervals. As a result, in the JOG data calculation unit 42, when the audio data DQ read from the data memory unit 30 is obtained under the JOG reproduction mode state, it is compared with the audio data DQN ′ from the concealment processing unit 41. Audio data DQJ 'having an increased sampling frequency is formed.

When the read audio data DQ from the data memory unit 30 is not obtained in the JOG reproduction mode state, but is obtained in the normal reproduction operation mode state. Is JOG
The data calculation unit 42 exerts no special effect on the audio data DQN ′ from the concealment processing unit 41,
Audio data DQN 'from the conceal processing unit 41
Is directly used as the audio data DQJ '.

In this way, the audio data DQJ 'obtained from the JOG data operation unit 42 is converted from parallel digital data to serial digital data in the parallel / serial conversion unit 43, and is output to the output terminal 45 as output audio data DAO. To be done.

In the above-described example of the digital data processing device according to the present invention, the audio data included in the audio information data obtained in the digital VTR is handled as the digital data. The processing device does not impose restrictions on the contents of the digital data handled,
Various digital data other than audio data can be handled.

[0049]

As is apparent from the above description, in the digital data processing device according to the present invention, the deinterleave processing is performed on a plurality of interleaved data segments forming the main information data in the digital data. When deinterleave processing is performed on each of the multiple data segments that make up the main information data, based on the count values for the multiple data segments that make up the main information data and the accompanying information data that accompanies the main information data. For the plurality of interleaved data segments forming the main information data, the array position to be calculated is calculated, and the write address control is performed with the write address control signal formed accordingly. Must be written to the data memory part of More, the main information data, is a state in which deinterleaving is performed for a plurality of data segments interleaving processing has been performed is stored in the data memory unit. Then, in such a state, the main information data stored in the data memory unit is placed in a state of being read out in a state in which deinterleaving processing has been performed on a plurality of data segments, and thereby, the interleave forming the main information data is set. Deinterleave processing is performed on the processed data segments.

Under the above circumstances, the data of each of the plurality of data segments forming the main information data is based on the count value of the plurality of data segments forming the main information data and the auxiliary information data accompanying the main information data. The calculation of the array position to be performed when the interleave processing is performed is properly performed in the case where the digital data sequentially and continuously arrives and the case where the digital data discretely arrives. , The main information data is deinterleaved for a plurality of interleaved data segments, and the data memory unit The state of being stored in Deinterleaving the plurality of data segments is performed accurately.

Therefore, according to the digital data processing apparatus of the present invention, the rotary magnetic head can generate digital data in which the auxiliary information data is added to the main information data composed of a plurality of interleaved data segments. The digital VTR, which performs an operation of reading digital data from tilted recording tracks formed in a large number on the magnetic tape, adopts a JOG reproduction mode state in which the running speed of the magnetic tape is slower than the running speed of the magnetic tape during recording. Even in the case of being obtained by (1), it is possible to properly perform deinterleaving processing for a plurality of interleaved data segments forming the main information data in the digital data.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an example of a digital data processing device according to the present invention together with a main part of a digital VTR to which the same is applied.

FIG. 2 is a conceptual diagram used for explaining scanning of an inclined recording track formed on a magnetic tape by a magnetic head provided in a main part of the digital VTR shown in FIG.

FIG. 3 is a diagram provided for explaining information included in audio information data recorded on a magnetic tape used with a digital VTR.

FIG. 4 is a diagram provided for explaining information included in audio information data recorded on a magnetic tape used with a digital VTR.

5 is a block connection diagram showing a specific example of a track number detecting unit provided in the example of the digital data processing device according to the present invention shown in FIG. 1. FIG.

FIG. 6 is a time chart used for explaining the operation of the specific example of the track number detecting unit shown in FIG.

FIG. 7 is a conceptual diagram showing an example of a recording format of a magnetic tape used with a digital VTR.

FIG. 8 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. 9 is a conceptual diagram showing an example of a data format of audio data recorded on a magnetic tape by a digital VTR.

[Explanation of symbols]

21 rotary magnetic head unit for reading 26 error correction / time axis correction unit 27 deinterleave processing unit
30 data memory section 31 byte counting section 32 sync block number detecting section 33 track number detecting section 34 write address signal forming section 36 clock counting section 37 read address signal forming section 4
1 Conceal Processing Unit 42 JOG Data Operation Unit 43 Parallel / Serial Conversion Unit 52 Track Pair Information Detection Unit 53 Head Azimuth Information Detection Unit 56 Track Number Discrimination Unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location G11B 20/18 572 G11B 20/18 572G H04N 5/92 H04N 5/92 H

Claims (5)

[Claims] 1. Writing at least the main information data in digital data in which auxiliary information data is added to main information data composed of a plurality of data segments which are interleaved in a unit of a predetermined data section. And a count value of a plurality of data segments forming main information data in the digital data and a write address control signal based on the auxiliary information data in the digital data, and the write address control is performed. A signal controls the write address for the main information data in the data memory unit, and the main information data is
A write control unit that is to be stored in the data memory unit in a state where deinterleave processing has been performed for a plurality of data segments that have been subjected to the interleave processing; and a write control unit from the data memory unit to the data memory unit. A digital data processing device, comprising: a read control unit configured to bring the stored main information data into a state where the main information data is read in a state in which the plurality of data segments are subjected to deinterleave processing. 2. A write control unit including the main information data obtained on the basis of count values of a plurality of data segments forming the main information data in the digital data and auxiliary information data in the digital data. Data for the large-scale data block, which is obtained based on the number in the large-scale data block including a plurality of the data-synchronization blocks for the data synchronization block and the additional information data in the digital data. 2. The digital data processing device according to claim 1, wherein the write address control signal is formed based on a number in a predetermined data section which is a unit of interleave processing for the segment. 3. A magnetic head reads from a recording track formed on a magnetic tape in a state where digital data formed by adding auxiliary information data to main information data forms a data synchronization block containing the main information data. A predetermined data section, which is regarded as a unit of interleave processing for the data segment, is formed by the main information data included in the digital data read by the magnetic head from the predetermined number of the recording tracks. And the auxiliary information data in the digital data includes sync block data representing information on the data sync block and track data representing information on a recording track from which the digital data has been read. Item 1 Digital data processing apparatus. 4. The write control unit includes a count value for a plurality of data segments forming main information data in digital data, and a data synchronization block for a data synchronization block obtained based on the synchronization block data. Numbers in a plurality of data synchronization blocks that are supposed to be read from one of the recording tracks,
For the recording track from which the digital data has been read, which is obtained based on the track data, the main information data that includes the recording track and forms a predetermined data section that is a unit of interleaving processing for the data segment is read. 4. The digital data processing device according to claim 3, wherein the write address control signal is formed on the basis of the numbers in the plurality of recording tracks that are supposed to be recorded. 5. Track pair information in which track data included in ancillary information data in digital data represents a number of two adjacent recording track sets including a recording track from which the digital data is read, And head azimuth information representing the state of the head azimuth in the magnetic head corresponding to the recording track from which the digital data has been read, and the write control unit based on the track pair information and the head azimuth information. For the recording track from which the digital data is read, a plurality of pieces of main information data, which includes the recording track and forms a predetermined data section as a unit of interleaving processing for a data segment, are read out. Number in the recording track of Claim and detecting 4
The described digital data processing device.