JP3994480B2 - Digital information recording / reproducing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention forms digital information data based on an information signal, records the digital information data on a recording medium, and reads the digital information data from the recording medium on which the digital information data is recorded. The present invention relates to a digital information recording / reproducing apparatus that performs an operation of reproducing an information signal based on digital information data.
[0002]
[Prior art]
The television signal is converted into digital data and recorded on the magnetic tape by forming an inclined recording track inclined with respect to its longitudinal direction, and the digitalized television signal forms an inclined recording track. A so-called digital video tape recorder (digital VTR) that reads a digital data-converted television signal from a magnetic tape recorded in this way and converts it into an analog signal to obtain a reproduced television signal is a television using a magnetic tape. It has been proposed that signal recording and playback can be performed without substantially reducing the quality of the television signal. For such a digital VTR, a description regarding examples thereof can be found in, for example, a document published by Nikkei BP: “Nikkei Electronics (Nikkei Electronics)”, 10-11 1993 (No. 592), pages 115-122. Can see.
[0003]
Even in the case of such a digital VTR, for example, each frame of the television signal is classified as a recording segment. The relationship between one frame of the television signal and the recording mode on the magnetic tape on which it is recorded is as follows. One example is as shown in FIG. In the example shown in FIG. 6, the inclined recording track TK in which digital data obtained by performing analog / digital conversion (A / D conversion) on one frame of a television signal is sequentially arranged on the magnetic tape TP. Are sequentially sorted and recorded in 10 adjacent to each other. Such recording is performed when a rotating magnetic head to which digital data is supplied scans the magnetic tape TP. Arrows DT and DH in FIG. 6 indicate the traveling direction of the magnetic tape TP and the rotation with respect to the magnetic tape TP, respectively. The scanning direction of the magnetic head is shown.
[0004]
Each of a large number of inclined recording tracks TK arranged on the magnetic tape TP represents a data structure in the inclined recording track TK from the starting end side to the ending side, and a reference for position in data editing or the like. The area IT in which the data to be recorded is recorded, the area AD in which the audio information data representing the contents of the audio signal in the television signal is recorded, and the area in which the video information data representing the content of the video signal in the television signal is recorded An area SC is formed in which time code data representing VD and time information is recorded.
[0005]
For example, the audio information data recorded in the area AD in one inclined recording track TK has 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 which constitutes the main part follows a coding format as shown in FIG. 7, for example. This coding format includes 14 data synchronization blocks whose synchronization block number i is 2 to 15, and each data synchronization block is formed of 90 bytes whose byte position number j is 0 to 89. Has been.
[0006]
In each of the nine data synchronization blocks whose synchronization block number i is 2 to 10, the first 2 bytes (byte position number j is 0 and 1) are used as synchronization data, and the next 3 bytes (byte position number). j is 2 to 4) is the ID code, the next 5 bytes (byte position number j is 5 to 9) is the audio auxiliary data, and the subsequent 72 bytes (byte position number j is 10 to 81). The audio data is configured by adding an inner parity of 8 bytes (byte position number j is 82 to 89) to the audio data. The ID code represents information about the recording mode regarding the inclined recording track, the synchronization block number i, and the like, and the audio auxiliary data represents information about the recording condition of the audio data including the number of constituent bits.
[0007]
The audio data in each of the nine data synchronization blocks whose synchronization block number i is 2 to 10 (audio data whose synchronization block number i is 2 to 10) has synchronization block numbers i and 2 in FIG. As illustrated, it is assumed to include 36 data segments each composed of 2 bytes. As shown in FIG. 8, these data segments are originally from the first one in the audio data whose synchronization block number i is 2 to the last one in the audio data whose synchronization block number i is 10, for example, Appears with consecutive segment numbers D0 to D323. However, in the audio information data that is actually recorded in the area AD in each inclined recording track TK, for example, the audio in the entire audio information data for one frame that is distributed and recorded in 10 inclined recording tracks TK. Interleaving processing is performed on data segments in order to reduce code errors in units of data. Accordingly, in the audio data included in the audio information data recorded in the area AD in one inclined recording track TK, 36 pieces of data constituting each of the audio data having the synchronization block number i of 2 to 10 It is assumed that the segments are not arranged in the order of the segment numbers but are arranged in accordance with the interleaving process.
[0008]
Each of the five data synchronization blocks having the synchronization block number i of 11 to 15 has the first 2 bytes (byte position number j is 0 and 1) as synchronization data, and the next 3 bytes (bytes). Position number j is 2 to 4) is an ID code, the subsequent 77 bytes (byte position number j is 5 to 81) is outer parity, and the outer parity is 8 bytes (byte position number j is 82 to 89). The inner parity is added. Therefore, the audio data exists in the range indicated by hatching in FIG. 7 where the synchronization block number i is 2 to 10 and the byte position number j is 10 to 81. .
[0009]
FIG. 9 shows that 10 inclined recording tracks TK (0th recording track to 9th recording track) are a set of 5 inclined recording tracks TK from the 0th recording track to the 4th recording track, and 5 Each inclined recording track recorded in a distributed manner on each of the five inclined recording tracks TK, divided into a set of five inclined recording tracks TK from the first recording track to the ninth recording track. For TK, the first data segment in the audio data having a synchronization block number i of 2 to the last data segment in the audio data having a synchronization block number i of 10 is represented as a continuous segment number of D0 to D1619 as a whole. The interleave processing is applied to the audio data having the data segment, and D0 Shows an example of a place was state sequence of D1619 segment number. Each of the data segments to which segment numbers D0 to D1619 are assigned has a 2-byte configuration.
[0010]
Under such circumstances, a digital VTR represents a television signal including audio information data recorded in the area AD from each of the inclined recording tracks TK arranged in a large number on the magnetic tape TP as described above. When reading composite data and obtaining a reproduction television signal based on the digital composite data, it is often desired that not only the reproduction television signal be obtained but also the audio information data can be edited. Be looked at. Such editing of the audio information data is performed, for example, by changing a part of the audio information data recorded in the area AD in the inclined recording track TK into audio information data in which the audio data included therein is replaced with another audio data. It is said that.
[0011]
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 reading rotary magnetic head, and the audio data included in a part of the read audio information data Due to other audio data different from that, for example, in a relatively short period, one audio data gradually decreases and disappears, and the other audio data appears and gradually increases. The audio information data including the replaced new audio data is formed by the cross-fade technique, and is read by the reading rotary magnetic head in the area AD in each of the plurality of inclined recording tracks TK. Original audio In which a part of the information data is recorded, it will be recorded using the recording rotary magnetic head.
[0012]
Then, the audio information data recorded on the inclined recording track TK formed in a large number of arrays on the magnetic tape TP is subjected to an interleaving process as shown in FIG. It is required to do it under the circumstances.
[0013]
Therefore, the applicant of the present application first reads the digital information data from the recording medium on which the digital information data subjected to the interleaving process is recorded, and other interleaving processes are performed on a part of the read digital information data. For example, a replacement process using a crossfade technique is performed on the digital information data that has been applied, and a part of the digital information data that has been subjected to the replacement process is replaced with the original interleave process on the recording medium. For example, the audio information data subjected to the interleaving process included in the digital composite data representing the television signal recorded on the magnetic tape can be edited by recording at a position where a part is read. , Part of which is subjected to another interleaving process The proposed digital information recording and reproducing apparatus capable of realizing a digital VTR capable of performing properly edits replace with crossfade technique by audio information data (Japanese Patent Application No. 8-84006).
[0014]
In the digital information recording / reproducing apparatus previously proposed by the applicant of the present application, the first digital data including a plurality of data segments subjected to the interleaving process read from the recording medium, and the first digital data For each of the second digital data including a plurality of interleaved data segments supplied to be replaced with a part of the digital data, the plurality of digital data included in the first digital data First coefficient data including a plurality of coefficient data segments respectively corresponding to the data segments, and second coefficient data including a plurality of coefficient data segments respectively corresponding to the plurality of data segments included in the second digital data. And are prepared. A plurality of data segments forming the first digital data and a plurality of coefficient data segments forming the first coefficient data correspond to each other. Mutual Corresponding to each other in the plurality of data segments forming the second digital data and the plurality of coefficient data segments forming the second coefficient data Mutual And an addition process for adding the multiplication output data based on the first digital data to the multiplication output data based on the second digital data to obtain digital data for editing. It is performed in a state where interleaving processing is performed on a plurality of data segments constituting the second digital data and in a state where interleaving processing is performed on the plurality of data segments constituting the second digital data. .
[0015]
Accordingly, from the time when the first digital data having a plurality of data segments subjected to the interleaving process is read from the recording medium, the editing digital data corresponding to the first digital data is transferred to the data recording unit. The data processing time required until the supply is set to a relatively short time, so that the editing digital data can be properly recorded at the position where the first digital data is read on the recording medium. Therefore, according to the digital information recording / reproducing apparatus previously proposed by the applicant of the present application, when the digital VTR is configured, it is included in the digital composite data representing the television signal recorded on the magnetic tape. With respect to the audio information data, a part of the audio information data can be appropriately edited by replacing the audio information data with another audio information data using a cross-fade technique.
[0016]
[Problems to be solved by the invention]
As described above, a part of the first digital data having a plurality of data segments subjected to the interleaving process is partially cross-faded by the second digital data having the plurality of data segments subjected to the interleaving process. In a digital information recording / reproducing apparatus adapted to perform replacement with a technique, a plurality of first digital data including a plurality of data segments subjected to interleave processing and a plurality of same interleave processing performed A plurality of coefficient data segments respectively corresponding to a plurality of interleaved data segments in one of the first and second digital data with respect to each of the second digital data including a plurality of data segments First coefficient data including In one and the other of the second digital data, it is necessary to provide the respective corresponding second coefficient data including a plurality of coefficient data segments into a plurality of data segments interleaving processing has been performed.
[0017]
In preparing the first and second coefficient data, each of which includes a plurality of coefficient data segments each corresponding to a plurality of data segments subjected to interleaving processing, the first and second coefficient data are prepared. The part that plays the role of forming and supplying the coefficient data usually has a relatively complicated circuit configuration and a large scale.
[0018]
In view of such a point, the invention described in any one of claims 1 to 7 in the claims of the present application has a plurality of data segments recorded on a recording medium and subjected to interleaving processing. For the first digital data, a part of the first digital data can be edited with the second digital data having a plurality of interleaved data segments, for example, by a crossfade technique. First coefficient data including a plurality of coefficient data segments respectively corresponding to the plurality of data segments subjected to the interleaving processing in one of the first and second digital data, and the first and second digital data A plurality of data subjected to interleaving in the other of the two digital data. An improved digital information recording / reproducing apparatus capable of forming and supplying second coefficient data including a plurality of coefficient data segments each corresponding to a data segment with a circuit configuration that is relatively simple and not large-scale provide.
[0019]
[Means for Solving the Problems]
A digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application includes a first data segment including a plurality of data segments subjected to interleaving processing from a recording medium. A data reading unit that reads digital data, a data supply unit that supplies second digital data including a plurality of interleaved data segments, and a plurality of data in the first digital data read by the data reading unit A memory unit in which the segments are written according to the interleave processing state, and the plurality of data segments in the first digital data are sequentially read out in accordance with the arrangement state of the plurality of data segments in the second digital data; A plurality of digital data included in one digital data First coefficient data including a plurality of coefficient data segments respectively corresponding to the data segments, and second coefficient data including a plurality of coefficient data segments respectively corresponding to the plurality of data segments included in the second digital data. A coefficient data forming unit for supplying data, a plurality of data segments included in the first digital data read from the memory unit, and a plurality of coefficient data segments included in the first coefficient data Mutual Corresponding to each other in a plurality of data segments included in the second digital data from the data supply unit and a plurality of coefficient data segments included in the second coefficient data Mutual A multiplication unit that performs multiplication processing on the product, multiplication output data based on a plurality of data segments included in the first digital data obtained from the multiplication unit, and multiplication output data based on a plurality of data segments included in the second digital data The data adding unit for obtaining the editing digital data by adding to the first digital data supplied to the multiplying unit in the recording medium for the editing digital data obtained from the data adding unit was read by the data reading unit A coefficient recording unit that records data at a position, and the coefficient data forming unit is a coefficient source corresponding to the array state characteristics of a plurality of data segments that are interleaved in each of the first and second digital data. Coefficient source data storage means for storing data, arrangement of multiple data segments Counting means for performing a counting operation in accordance with the state characteristics, computing means for computing the coefficient source data obtained from the coefficient source data storage means according to the count result of the counting means, and computation results obtained from the computing means A data output means for obtaining the first and second coefficient data based on the data is configured.
[0020]
In the digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application configured as described above, the first digital data by the multiplier is provided. Corresponding to a plurality of data segments included in the first coefficient data and a plurality of coefficient data segments included in the first coefficient data Mutual And a plurality of data segments included in the second digital data and a plurality of coefficient data segments included in the second coefficient data correspond to each other. Things And the multiplication output data based on the plurality of data segments included in the first digital data by the data adding unit is added to the multiplication output data based on the plurality of data segments included in the second digital data. The addition processing for obtaining the digital data for use is in a state in which the first digital data is subjected to interleaving processing for a plurality of data segments constituting the first digital data, and the second digital data constitutes the plurality of data segments constituting the plurality of data segments This is performed in a state where interleaving processing is performed on the data segment.
[0021]
Thus, the editing digital data from the data adding unit corresponding to the first digital data from the time when the first digital data having a plurality of data segments subjected to the interleaving process is read from the recording medium. The data processing time required until the data recording unit is supplied is set to a relatively short time, and the editing digital data is recorded at the position where the first digital data is read on the recording medium. It can be done properly.
[0022]
A coefficient source data storage unit storing coefficient source data corresponding to the array state characteristics of the plurality of data segments subjected to the interleave processing in each of the first digital data and the second digital data; In accordance with the counting means for performing the counting operation according to the array state characteristics of the plurality of data segments subjected to the interleaving processing in each of the first and second digital data, the coefficient is determined by the calculating means according to the count result of the counting means. Coefficient data is obtained by calculating the coefficient source data obtained from the source data storage means, and obtaining the first and second coefficient data based on the calculation result obtained from the calculation means by the data output means. To simplify and reduce the circuit configuration of the forming part That.
[0023]
Therefore, in the digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application, a plurality of interleaved processes recorded on a recording medium are applied. A part of the first digital data having the data segment is appropriately replaced with the second digital data having a plurality of data segments subjected to the interleaving process, for example, by a crossfade technique, and The first coefficient data including a plurality of coefficient data segments respectively corresponding to the plurality of data segments subjected to the interleaving processing included in the first digital data, which are required for the editing, and the second Multiple interleaved processing included in digital data Over to a data segment second coefficient data including a plurality of coefficient data segments each corresponding becomes relatively simple and is formed by the coefficient data forming unit having the circuit configuration does not become large and it is supplied.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 shows an example of a digital information recording / reproducing apparatus according to the invention described in any one of claims 1 to 7 in the claims of the present application. In the example shown in FIG. 2, the digital composite data representing the television signal is formed based on the television signal, the formed digital composite data is recorded on the recording medium, and the digital representing the television signal. The digital composite data is read from the recording medium on which the composite data is recorded, and a television signal is reproduced based on the read digital composite data. As shown in FIG. Is configured to constitute a digital VTR used together with the magnetic tape TP formed in an array.
[0025]
In the example shown in FIG. 2, the magnetic tape TP is read by the reading rotary magnetic head 11 while being used with the magnetic tape TP on which the inclined recording tracks TK are arranged as shown in FIG. To read digital composite data DTT representing a television signal. This digital composite data DTT includes video information data, audio information data, and other data. The audio information data is coded as audio data in the coding format shown in FIG. 7, and is shown in FIG. Audio data composed of an array of data segments that have been subjected to interleave processing in such a manner as described above, and auxiliary information data for audio data such as synchronization data, ID code, audio auxiliary data, and the like are included.
[0026]
The digital composite data DTT obtained from the read 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. The inner parity error correction unit 14 performs an error correction process on the code error detected by the inner parity of each of the video information data and the audio information data included in the digital composite data DTT. The composite data DTO obtained by the above is supplied to each of the outer parity error correction unit 15 and the audio outer parity error correction unit 16.
[0027]
The outer parity error correction unit 15 performs an error correction process on the code error detected by the outer parity included in each of the video information data and the audio information data included in the composite data DTO. The video information data DVO subjected to the correction process is derived, and further the audio information data DAO subjected to the error correction process is derived. The video information data DVO is supplied to a video information processing unit (not shown in FIG. 2), and the audio information data DAO is supplied to a selection contact 17a of the switch 17.
[0028]
The audio outer parity error correction unit 16 performs an error correction process on the code information detected by the outer parity included in the audio information data included in the composite data DTO, and performs the error correction process. The received audio information data DAQ is obtained and supplied to the editing unit 18. The error correction process for the audio information data included in the composite data DTO performed in the audio outer parity error correction unit 16 is an error correction process performed on the audio information data regardless of the video information data. The processing time is assumed to be relatively short. For example, the processing time required for the error correction process in the audio outer parity error correction unit 16 is set to be shorter than the time corresponding to the period in which the read rotary magnetic head 11 scans each inclined recording track TK.
[0029]
On the other hand, the audio signal SR is supplied to the A / D converter 22 through the audio signal input terminal 21 in the selected period. In the A / D converter 22, when the audio signal SR is supplied, A / D conversion is performed on the audio signal SR, and audio data DAR based on the audio signal SR is obtained. The A / D conversion of the audio signal SR in the A / D converter 22 is performed so that the audio data DAR obtained thereby is coded as audio data in the coding format shown in FIG. Done. That is, the audio data DAR obtained from the A / D converter 22 is also indicated by hatching in the coding format shown in FIG. 7, and the synchronization block number i is 2 to 10, and the byte position. It is assumed that the number j is in the range of 10-81.
[0030]
The audio data DAR obtained from the A / D conversion unit 22 is supplied to the interleave processing unit 24 after necessary processing is performed in the digital signal processing unit 23. In the interleave processing unit 24, the interleave processing for the data segments constituting the audio data DAR in units of one frame is performed in a manner as shown in FIG. The audio data subjected to the interleaving process is obtained in which the arrangement mode of the data segments is the same as the arrangement mode of the data segments constituting the audio data included in the audio information data DAQ.
[0031]
In addition, the interleave processing unit 24, for example, receives control information representing auxiliary information data for audio data such as synchronization data, ID code, and audio auxiliary data as shown in FIG. 7 from a control block 25 formed by a microcomputer. As a result, the data DIA is supplied, and in the interleave processing unit 24, the audio data subjected to the interleave processing is added with the synchronization data, the ID code and the audio auxiliary data, which are auxiliary information data, and the audio information data DRI. Is formed.
[0032]
The audio information data DRI obtained from the interleave processing unit 24 is supplied to the editing unit 18 and also to the selection contact 26 a of the switch 26. The editing unit 18 includes a frame reference signal PF, an enable signal PE, and an operation mode setting signal CM in addition to the audio information data DAQ from the audio outer parity error correction unit 16 and the audio information data DRI from the interleave processing unit 24. Supplied. The operation mode setting signal CM indicates an editing operation mode as one of the operation modes.
[0033]
When the operation mode setting signal CM indicates the editing operation mode, in the editing unit 18, audio information in which a part of the audio data in the audio information data DAQ from the audio outer parity error correction unit 16 is obtained from the interleave processing unit 24. Data replacement processing to be replaced by audio data in the data DRI is performed. Then, the editing audio information data DAX is obtained from the editing unit 18.
[0034]
The data replacement process performed by the editing unit 18 is performed in the audio information data DAQ when deinterleaving processing is performed on audio data in the editing audio information data DAX obtained from the editing unit 18, for example. As the audio data is gradually reduced and disappears and the audio data in the audio information data DRI is subjected to crossfading processing in which the audio data gradually increases, the audio information data DRI is replaced with the audio data in the audio information data DRI. Audio data in the audio information data DRI can be continuously obtained, followed by a process for obtaining audio data (hereinafter referred to as editing start cross-fade process). Processing (hereinafter referred to as editing period processing), and subsequent crossfade processing in which audio data in the audio information data DRI gradually decreases and disappears, and audio data in the audio information data DAQ gradually increases. Is performed, including processing for obtaining again audio data in the audio information data DAQ instead of audio data in the audio information data DRI (hereinafter referred to as editing end cross-fade processing).
[0035]
Specifically, the editing unit 18 is configured as shown in FIG. 3, for example. In the specific example of the editing unit 18 shown in FIG. 3, the audio information data DAQ from the audio outer parity error correction unit 16 is supplied through the input terminal unit 31. The audio information data DAQ through the input terminal unit 31 is converted into parallel data by the serial-parallel conversion unit 32 and supplied to a memory unit 33 formed by a random access memory (RAM).
[0036]
The audio information data DAQ through the input terminal unit 31 is also supplied to the frame start end detection unit 34. In the frame start end detection unit 34, the start end 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 a detection output signal SFI representing the detected start end of each frame is generated. It is formed. The detection output signal SFI from the frame start end detection unit 34 is supplied to the write control signal forming unit 35, and the write control signal forming unit 35 writes a write control signal corresponding to the start end of each frame represented by the detection output signal SFI. A QW is formed and supplied to the memory unit 33. As a result, in the memory unit 33, the audio information data DAQ supplied from the serial-parallel conversion unit 32 is written under address control according to the write control signal QW.
[0037]
Also, the audio information data DRI from the interleave processing unit 24 is supplied to the serial-parallel conversion unit 37 through the input terminal unit 36, and converted into parallel data by the serial-parallel conversion unit 37, and the audio data processing unit 38 and the attached data are supplied. The data is supplied to the information data processing unit 39. In the audio data processing unit 38, the audio data included in the audio information data DRI is taken out, and on the other hand, 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. The audio data DRA is formed. The audio data DRA obtained from the audio data processing unit 38 is supplied to the multiplication unit 40. Further, in the attached information data processing unit 39, the synchronization data, ID code and audio auxiliary data included in the audio information data DRI are taken out, and these are set as attached information data Drp and supplied to the selection contact 41b of the switch 41. The
[0038]
The audio information data DRI through the input terminal unit 36 is supplied to the coefficient data forming unit 42. The coefficient data forming unit 42 is supplied with the frame reference signal PF and the enable signal PE in addition to the audio information data DRI, and further from the control signal forming unit 43 to which the operation mode setting signal CM is supplied. Control signals CK1, CK2 and CK3 sent in accordance with CM are supplied. The control signal CK1 indicates that the edit start crossfade process is to be performed, the control signal CK2 indicates that the edit period process is to be performed, and the control signal CK3 indicates that the edit end crossfade process is to be performed. Represents each.
[0039]
The coefficient data forming unit 42 includes coefficient data segments each representing a plurality of coefficients Ka corresponding to the interleaved data segments constituting the audio data included in the audio information data DAQ written in the memory unit 33. Coefficient data DKA and a coefficient data segment representing a plurality of coefficients Kr corresponding to the interleaved data segments constituting the audio data included in the audio information data DRI supplied through the input terminal unit 36. The coefficient data DKR is used for performing an edit start cross-fade process according to the control signal CK1 supplied from the control signal forming unit 43, and according to the control signal CK2 supplied from the control signal forming unit 43. For editing period processing Is, and, in response to a control signal CK3 supplied from the control signal forming part 43 are those for editing ends crossfading, they are respectively sent. Furthermore, the coefficient data forming unit 42 configures audio data included in the audio information data DRI supplied through the input terminal unit 36 in accordance with the control signals CK1, CK2, and CK3 supplied from the control signal forming unit 43. A read control signal QR according to the arrangement state of the data segment subjected to the interleave processing is sent out.
[0040]
The read control signal QR sent from the coefficient data forming unit 42 is supplied to the memory unit 33, and the audio information data DAQ written to it from the memory unit 33 is read and address control is performed by the read control signal QR. To be done. Thereby, the audio information data DAQ is sent out from the memory unit 33 and supplied to the audio data processing unit 45 and the attached information data processing unit 46. In the audio data processing unit 45, the audio data included in the audio information data DAQ is taken out, and on the other hand, 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. The audio data DAA is formed. The audio data DAA obtained from the audio data processing unit 45 is supplied to the multiplication unit 40 and also supplied to the error correction status detection unit 47.
[0041]
The multiplication unit 40 is supplied with the coefficient data DKA and the coefficient data DKR sent from the coefficient data forming unit 42. When the coefficient data DKA and coefficient data DKR sent from the coefficient data forming unit 42 are supplied, the multiplication unit 40 configures a data segment and coefficient data DKA that have been subjected to interleaving processing that constitutes the audio data DAA. Corresponding to each other in the coefficient data segment Mutual Corresponding to each other in the data segment subjected to the interleaving process constituting the audio data DRA and the coefficient data segment constituting the coefficient data DKR Mutual And multiplication processing is performed.
[0042]
Corresponding to each other in the interleaved data segment constituting the audio data DAA and the coefficient data segment constituting the coefficient data DKA Mutual Represents a data segment obtained by multiplying each of the data segments subjected to the interleaving process constituting the audio data DAA by the coefficient Ka represented by the coefficient data segment constituting the corresponding coefficient data DKA. A multiplication process result is generated, and audio data DAB based on the multiplication process result is obtained. In addition, data segments corresponding to each other in the interleaved data segment constituting the audio data DRA and the coefficient data segment constituting the coefficient data DKR Mutual Represents a data segment obtained by multiplying each of the data segments subjected to the interleaving process constituting the audio data DRA by the coefficient Kr represented by the coefficient data segment constituting the corresponding coefficient data DKR. A multiplication process result is generated, and audio data DRB based on the multiplication process result is obtained.
[0043]
The audio data DAB and the audio data DRB obtained from the multiplication unit 40 are subjected to addition processing in the data addition unit 50 to form audio data DAW, and the audio data DAW is obtained from the data addition unit 50. . The audio data DAW obtained from the data adder 50 is supplied to the selection contact 51a in the switch 51 as editing audio data.
[0044]
The audio data DAA obtained from the audio data processing unit 45 through the above-described editing start cross-fade processing, editing period processing, and editing end cross-fade processing by the multiplication processing in the multiplication unit 40 and the addition processing in the data addition unit 50. However, data replacement processing to be replaced by the audio data DRA obtained from the audio data processing unit 38 is performed.
[0045]
The edit start crossfade process included in the data replacement process for the audio data DAA and the audio data DRA is related to the digital composite data DTT obtained from the read rotary magnetic head 11 as shown in FIG. This is performed in a period from time t0 immediately after the leading edge of the frame reference signal PF to be performed to time t2 thereafter. In the period from the time point t0 to the time point t2, the segment numbers D0, D45, and D90 in which the audio data DAA and the audio data DRA are connected in a predetermined arrangement mode that is not in the order of numbers due to the interleaving process. ,... Are obtained in a mutually synchronized state.
[0046]
At this time, the coefficient data DKA and coefficient data DKR sent from the coefficient data forming unit 42 are also included in the coefficient data segment constituting each from the start time t0 in the period from time t0 to time t2. The audio data DAA and the audio data DRA are obtained in a synchronized state with the data segment subjected to the interleaving process. Then, the coefficient Ka represented by each of a large number of coefficient data segments in the coefficient data DKA corresponding to the audio data DAA is multiplied by the data segment constituting the audio data DAA in the multiplier 40, and the data relating to the audio data DAB obtained by the multiplication is obtained. When interleaving is performed, the data segments constituting the audio data DAB are gradually reduced, and the coefficient Kr represented by each coefficient data segment in the coefficient data DKR corresponding to the audio data DRA is represented by: When deinterleaving is performed on the audio data DRB obtained by multiplying the data segment constituting the audio data DRA in the multiplication unit 40, the data segment constituting the audio data DRB is performed. There are those that will continue to incrementally.
[0047]
Further, the coefficient data segment constituting each of the coefficient data DKA and coefficient data DKR sent from the coefficient data forming unit 42 is not obtained from the starting time point t0 in the period from the time point t0 to the time point t2, for example, As shown in FIG. 5, it is also possible to start obtaining from a time t3 that is arbitrarily set later than the time t0. Even in such a case, the order of the coefficient data segments constituting each of the obtained coefficient data DKA and coefficient data DKR is such that the coefficient data segments constituting each of the coefficient data DKA and the coefficient data DKR are obtained from the time point t0. Same as when starting. Then, when the edit start cross-fading process in which the audio data DRA is obtained instead of the audio data DAA is arbitrarily set later than the time t0 immediately after the leading edge of the frame reference signal PF, accordingly, in the middle of the frame It will be started from the time set arbitrarily.
[0048]
The editing end cross-fade processing in which the audio data DAA is obtained again instead of the audio data DRA, which is performed after the editing period processing in which the state in which the audio data DRA is obtained following the editing start cross-fading processing is continued. This is performed in the same manner as the editing start crossfade process.
[0049]
In the error correction status detection unit 47 to which the audio data DAA obtained from the audio data processing unit 45 is supplied, the audio data DAA cannot be erroneously corrected in the inner parity error correction unit 14 and the audio outer parity error correction unit 16. If there is a situation, it is detected. Then, when the error correction status detection unit 47 detects that the audio data DAA is in a situation where the error correction is impossible, the error correction status detection unit 47 sends preset error code data DE, This is supplied to the selection contact 51b in the switch 51 and also supplied to the switching control signal forming unit 52 that forms and sends the switching control signal C3.
[0050]
In the switching control signal forming unit 52, when the error code data DE is supplied, the switching control signal C3 is changed according to the error code data DE. The switching control signal C3 sent from the switching control signal forming unit 52 is supplied to the switch 51. When the error code data DE from the error correction status detecting unit 47 is not supplied, the movable contact 51c is selected by the switch 51. When the error code data DE from the error correction status detector 47 is supplied, the switch 51 is brought into a state where the movable contact 51c is connected to the selection contact 51b.
[0051]
Therefore, at the normal time when the audio data DAA obtained from the audio data processing unit 45 cannot be erroneously corrected, the movable contact 51c of the switch 51 is supplied from the data adding unit 50 supplied to the selection contact 51a. When the audio data DAW, which is the audio data for editing, is derived and the audio data DAA is in a situation where the error correction is impossible, the error code data DE from the error correction status detector 47 is detected. Is derived. The audio data DAW or error code data DE obtained from the switch 51 in this way is supplied to the selection contact 53 a in the switch 53.
[0052]
In the auxiliary information data processing unit 46 to which the audio information data DAQ sent out from the memory unit 33 is supplied, the synchronization data, ID code and audio auxiliary data included in the audio information data DAQ are extracted, and these are attached to the auxiliary information data Dap. And supplied to the selection contact 41a of the switch 41. The switch 41 is controlled by a control signal C4 sent from the control signal forming unit 43 according to the operation mode setting signal CM, and the movable contact 41c is connected to the selection contact 41a according to the control signal C4, and the movable contact 41c. The attached information data Dap is derived, or the movable contact 41c is connected to the selection contact 41b, and the attached information data Drp is derived to the movable contact 41c. Then, the attached information data Dap or the attached information data Drp derived to the movable contact 41 c of the switch 41 is supplied to the movable contact 53 b of the switch 53.
[0053]
The switch 53 is controlled by a control signal C5 sent from the control signal forming unit 43 according to the operation mode setting signal CM, and the movable contact 53c is connected to the selection contact 53b according to the control signal C5. The attached information data Dap or the attached information data Drp is derived to the movable contact 53c. Subsequently, the movable contact 53c is connected to the selection contact 53a, and the audio data DAW or the error code data DE from the switch 51 is transmitted to the movable contact 53c. The derived state is taken for each data synchronization block in the audio data DAW or the error code data DE. Thereby, in the switch 53, the synchronization data, ID code and audio auxiliary data based on the auxiliary information data Dap or the auxiliary information data Drp are added to each data synchronization block in the audio data DAW or the erroneous code data DE, and data synchronization is performed. A block will be formed. Then, the editing audio information data DAX formed including a series of such data synchronization blocks is obtained at the movable contact 53 c in the switch 53, converted into parallel data in the parallel-serial conversion unit 54, and output terminal 55. It is derived to (the output terminal of the editing unit 18).
[0054]
In this way, the editing audio information data DAX obtained from the editing unit 18 is supplied to the selection contact 26b of the switch 26 in the example shown in FIG. In the switch 26, the movable contact 26c is connected to the selection contact 26a according to the control signal C1 supplied thereto, and the audio information data DRI obtained from the interleave processing unit 24 is derived to the movable contact 26c, or The movable contact 26c is connected to the selection contact 26b, and the audio information data for editing DAX obtained from the editing unit 18 is derived to the movable contact 26c.
[0055]
The audio information data DRI or the editing audio information data DAX derived to the movable contact 26c of the switch 26 is once written and stored in a memory unit 60 formed by a random access memory (RAM). Then, the audio information data DRI or the editing audio information data DAX appropriately read from the memory unit 60 is supplied to the selection contact 17 b of the switch 17.
[0056]
In the switch 17, the movable contact 17c is connected to the selection contact 17a according to the control signal C2 supplied thereto, and the audio information data DAO obtained from the outer parity error correction unit 15 is derived, or The movable contact 17c is connected to the selection contact 17b, and the audio information data DRI or the editing audio information data DAX obtained from the switch 26 is derived to the movable contact 17c.
[0057]
Audio information data DAO, audio information data DRI or editing audio information data DAX derived to the movable contact 17 c of the switch 17 is supplied to the deinterleave processing unit 61. In the deinterleave processing unit 61, one frame of audio information data DAO, audio information data DRI, or editing audio for audio data included in the audio information data DAO, audio information data DRI, or editing audio information data DAX. The deinterleaving process is performed on the data segment that has been subjected to the interleaving process in units of audio data in the entire information data DAX, whereby the audio data DAD configured with the original array of data segments is obtained. In this way, the audio data DAD obtained from the deinterleave processing unit 61 is subjected to necessary processing in the digital signal processing unit 62 and then converted into analog data in the digital / analog (D / A) conversion unit 63. The signal SA is output to the audio signal output terminal 64 as a reproduction audio signal.
[0058]
In this manner, the audio signal SA obtained at the audio signal output terminal 64 is used to reproduce or edit the sound represented by the audio information data DAO obtained based on the digital composite data DTT obtained from the reading rotary magnetic head 11. The audio information data DRI supplied to 18 or the editing audio information data DAX obtained from the editing unit 18 can be monitored.
[0059]
Also, the editing audio information data DAX obtained from the editing unit 18 is supplied to the outer parity adding unit 65. Then, the outer audio parity data is added to the editing audio information data DAX by the outer parity adding unit 65, and further, the inner parity is added by the inner parity adding unit 66 to form the recording audio information data DDZ. It is supposed to be. The recording audio information data DDZ obtained from the inner parity adding unit 66 is supplied to the recording rotary magnetic head 68 through the recording amplifying unit 67, and a plurality of inclined recording tracks on the magnetic tape TP is recorded by the recording rotary magnetic head 68. Of the area AD in each of the TKs, the audio information data that is the source of the audio data DAA used for data replacement by the audio data DRA in the editing unit 18 is recorded.
[0060]
As described above, the editing audio information data DAX is formed and the recording audio information data DDZ based on the editing audio information data DDZ is recorded on the magnetic tape TP by the recording rotary magnetic head 68. In the information recording / reproducing apparatus, an interleaved data segment obtained from digital composite data DTT which is read from a magnetic tape TP by a reading rotary magnetic head 11 and subjected to error correction processing for a code error. The audio information data DAX for editing is formed from the audio information data DAQ including the audio data composed of the above and the audio information data DRI including the audio data composed of the data segment subjected to the interleaving process different from the audio information data DAQ composed of To do In addition, the audio information data DAQ and the audio information data DRI are not deinterleaved, and each of the audio information data DAQ and the audio information data DRI includes audio data composed of data segments subjected to the interleave processing. Data processing time required from the time when the digital composite data DTT is read until the editing audio information data DAX corresponding to the audio information data DAQ based on the digital composite data DTT is formed. Is a relatively short time.
[0061]
In addition, the error correction processing for the code error in obtaining the editing audio information data DAX is limited to the processing necessary for obtaining the audio information data DAQ subjected to the error correction processing. The data processing time required from when the DTT is read to when the editing audio information data DAX corresponding to the audio information data DAQ based on the DTT is formed is further reduced.
[0062]
Specifically, the coefficient data forming unit 42 shown in FIG. 3 is configured as shown in FIG. 1, for example. A specific example of the coefficient data forming unit 42 is based on audio data DAA obtained from the audio data processing unit 45 based on audio information data DAQ sent from the memory unit 33 and audio information data DRI obtained from the interleave processing unit 24. The audio data DRA obtained from the audio data processing unit 38 is interleaved with respect to the data segments constituting the audio data DRA in units of one frame as shown in FIG. Therefore, using the fact that a predetermined regularity is seen in the arrangement of the plurality of data segments subjected to the interleave processing for each, the data segment subjected to the interleave processing that constitutes the audio data DAA Multiple coefficients corresponding to each coefficient data DKA including a coefficient data segment representing a, coefficient data DKR including a coefficient data segment representing a plurality of coefficients Kr respectively corresponding to the data segments subjected to the interleave processing constituting the audio data DRA, and Forms the read control signal QR supplied to the memory unit 33.
[0063]
Under the interleave processing mode shown in FIG. 9, five sets from the fifth to the fourth of the ten inclined recording tracks TK on which one frame of audio data is recorded and the fifth For the data segments of the audio data recorded in each of the five groups from the first to the ninth, the arrangement of the segment numbers D0 to D1619 is the byte position number j (10 to 81) for the 0th inclined recording track TK. 10 and starts from D0 corresponding to the position where the synchronization position number i (2 to 10) is 2, and increases by 45 as the byte position number j (10 to 81) increases by 2, The synchronous block number i (2 to 10) increases by 15 each time it increases by 1 in each of the groups 2 to 4, 5 to 7, and 8 to 10. It is the things. Then, the synchronization block number i of 2 to 4 is set for each of the group of five inclined recording tracks TK from the 0th to the fourth and the group of five inclined recording tracks TK from the fifth to the ninth. The segment numbers corresponding to the heads of the respective groups 5 to 7 and 8 to 10 are sequentially D0, D10, D5, D3, D13, D8, D6, D1, D11, D9, D4, D14, D12, D7, D2 (D0, D10, D5,..., D2).
[0064]
In order to obtain the coefficient data DKA and coefficient data DKR for performing the edit start crossfading process, the coefficient data segments of the coefficient data DKA are respectively set to values corresponding to the segment numbers arranged as shown in FIG. Those having the coefficient Ka, which is assumed to be smaller as the value is larger, are successively connected. On the other hand, the coefficient data segments of the coefficient data DKR are segment numbers arranged as shown in FIG. It is sufficient that values having a coefficient Kr that takes a value corresponding to each of the values and increases as the value increases sequentially.
[0065]
Further, in order to obtain the coefficient data DKA and coefficient data DKR for performing the editing period process, the coefficient data segment of the coefficient data DKA has a coefficient Ka representing “0”, and the coefficient data segment of the coefficient data DKR is “ It is sufficient to have a coefficient Kr representing 1 ″.
[0066]
Furthermore, in order to obtain the coefficient data DKA and coefficient data DKR for performing the edit start crossfade process, the coefficient data segments of the coefficient data DKA are set to values corresponding to the segment numbers arranged as shown in FIG. For example, the larger the value, the larger the coefficient Ka, which is assumed to be larger, is sequentially connected. On the other hand, the coefficient data segments of the coefficient data DKR are arranged as shown in FIG. The values corresponding to the segment numbers are taken, and those having a coefficient Kr that is smaller as the value is larger may be successively connected.
[0067]
Under such circumstances, in the specific example of the coefficient data forming unit 42 shown in FIG. 1, the coefficient source data DCY, DCB, and DCS that are the basis of the coefficient data DKA and DKR can be supplied. Three coefficient source data storage units 71, 72 and 73 are provided. In view of the fact that the coefficient source data DCY that can be supplied by the coefficient source data storage unit 71 increases the segment number by 45 each time the byte position number j (10 to 81) increases by 2 in FIG. 45. The coefficient source data DCB that can be supplied by the coefficient source data storage unit 72 includes a set of five inclined recording tracks TK from the 0th to the fourth and five inclined recordings from the fifth to the ninth in FIG. For each of the sets of tracks TK, the segment numbers corresponding to the heads of the sets of the synchronization block numbers i of 2 to 4, 5 to 7, and 8 to 10 are sequentially D0, D10, D5,. In consideration of D2, 1, 11, 6, 4, 14, 9, 7, 10, 12, 10, 5, 15, 13, 8, 3 (1, 11, 6,... , 3). Further, in the coefficient source data DCS that can be supplied by the coefficient source data storage unit 73, in FIG. 9, the synchronous block number i is increased by 1 in each of the groups 2-4, 5-7, and 8-10. In view of the fact that the segment number is incremented by 15, it is assumed that 0, 15, and 30 are sequentially represented.
[0068]
Further, in the specific example of the coefficient data forming unit 42 shown in FIG. 1, the audio information data DRI supplied through the input terminal unit 36 shown in FIG. 3 is supplied to the byte counter unit 75. The byte counter unit 75 is also supplied with a frame reference signal PF and an enable signal PE. The enable signal PE is assumed to have a leading edge at the head (j = 10) of each data synchronization block represented by the synchronization block number i.
[0069]
In the byte counter unit 75, the count operation is started at the leading edge of the enable signal PE under a state that is reset every time the frame reference signal PF arrives, and the byte position number j in the audio information data DRI is used. Each byte data represented is counted, and byte count output data DYC representing the count result is obtained. The byte count output data DYC from the byte counter unit 75 is supplied to the byte decoder unit 76 and the read control signal forming unit 77 and also to the synchronous block counter unit 78.
[0070]
The synchronization block counter 78 counts each data synchronization block represented by the synchronization block number i in the audio information data DRI based on the count result for the byte data represented by the byte count output data DYC. Synchronous block count output data DLC representing the result is obtained. The synchronized block count output data DLC from the synchronized block counter unit 78 is supplied to the synchronized block / track decoder unit 79 and the read control signal forming unit 77 and also to the track counter unit 80.
[0071]
The track counter unit 80 counts the tilted recording track TK on the magnetic tape TP based on the count result of the data synchronization block represented by the synchronization block count output data DLC, and outputs the track count output indicating the count result. Data DTC is obtained. The track count output data DTC from the track counter unit 80 is supplied to a synchronous block / track decoder unit 79 and a read control signal forming unit 77.
[0072]
In the byte decoder unit 76, the byte count output data DYC from the byte counter unit 75 is decoded, and a latch reset pulse PLR is transmitted at the leading end (j = 10) of each data synchronization block in the audio information data DRI. A latch pulse PL83 is sent out at the center of each data segment consisting of 2 bytes, and a latch pulse PL82 is sent out at the tip of each data segment consisting of 2 bytes (excluding the first one in each data synchronization block).
[0073]
Further, in the sync block / track decoder section 79, the sync block count output data DLC from the sync block counter section 78 and the track count output data DTC from the track counter section 80 are decoded, and the sync block number in the audio information data DRI is decoded. Each time i changes, a data switching control pulse PSB is sent, and every time the synchronization block number i in the audio information data DRI becomes 2, 5, 8 (repeated), a data switching control pulse PSS is sent.
[0074]
Under such circumstances, coefficient source data DCY representing 45 supplied from the coefficient source data storage unit 71 is supplied to the data addition unit 81. The data adding unit 81 is also supplied with the data latched by the latch unit 83 to which the latch reset pulse PLR and the latch pulse PL83 sent from the byte decoder unit 76 are supplied. As a result, addition data DCYA obtained by adding the data latched by the latch unit 83 to the coefficient source data DCY is obtained from the data addition unit 81, and the latch reset pulse PLR sent from the byte decoder unit 76 is obtained. And the latch pulse PL82 are supplied to the latch unit 82.
[0075]
In the latch unit 82, the latch data is reset in response to the latch reset pulse PLR that arrives at the leading end (j = 10) of each data synchronization block, and the addition data DCYA from the data addition unit 81 consists of 2 bytes. Latching is performed in response to a latch pulse PL82 that arrives at the tip of each data segment (excluding the first one in each data synchronization block). Then, the addition data DCYA latched by the latch unit 82 is supplied to the latch unit 83.
[0076]
In the latch unit 83, the latch data is reset according to the latch reset pulse PLR that arrives at the leading end (j = 10) of each data synchronization block, and the addition data DCYA latched in the latch unit 82 is 2 bytes. Latched in response to a latch pulse PL83 that arrives at the center of each data segment.
[0077]
The addition data DCYA latched by the latch unit 82 is also supplied to the data addition unit 84.
[0078]
On the other hand, the coefficient source data storage unit 72 is supplied with a data switching control pulse PSB transmitted from the synchronous block / track decoder unit 79. Then, from the coefficient source data storage unit 72, the synchronization in the audio information data DRI is synchronized with the data switching control pulse PSB that arrives every time the synchronization block number i in the audio information data DRI becomes 2, 5, and 8 (repeated). When the block number i becomes 2, 5, 8 (repeated), the coefficient source data DCB that changes to sequentially represent 1, 11, 6,... 85.
[0079]
The coefficient source data storage unit 73 is supplied with a data switching control pulse PSS sent from the synchronous block / track decoder unit 79. Each time the synchronization block number i in the audio information data DRI changes from the coefficient source data storage unit 73 in accordance with the data switching control pulse PSS that arrives every time the synchronization block number i in the audio information data DRI changes, 0, The coefficient source data DCS changing (repeating) 15 and 30 to those sequentially representing are extracted and supplied to the data adder 85.
[0080]
In the data adding unit 85, the coefficient source data DCB extracted from the coefficient source data storage unit 72 and the coefficient source data DCS extracted from the coefficient source data storage unit 73 are added to form the addition data DBS, and the addition data DBS Is supplied to the data adder 84. In the data addition unit 84, the addition data DCYA latched in the latch unit 82 and the addition data DBS obtained from the data addition unit 85 are further added to obtain the segment numbers arranged as shown in FIG. Coefficient data DKO is obtained in which a plurality of coefficient data segments each having a coefficient that takes a corresponding value and has a larger value as the value increases are sequentially connected.
[0081]
In this way, the coefficient data DKO obtained from the data adding unit 84 is directly supplied to the coefficient data selection control unit 86, and at the inverse coefficient data forming unit 87, the segments arranged as shown in FIG. A value corresponding to each number is taken and converted into inverse coefficient data DKQ in which a plurality of coefficient data segments having coefficients that are smaller as the value is larger are sequentially connected to each other. It is supplied to the selection control unit 86.
[0082]
Further, the coefficient data DKO obtained from the data adder 84 is also supplied to the overflow detector 88. In the overflow detection unit 88, it is detected that the coefficient data DKO is in an overflow state. When the overflow is detected, an overflow detection signal COV is transmitted and supplied to the coefficient data selection control unit 86. .
[0083]
The coefficient data selection control unit 86 is also selectively supplied with control signals CK1, CK2, and CK3 sent from the control signal forming unit 43 shown in FIG. Further, in the coefficient data selection control unit 86, “0” coefficient data DOZ constituted by sequentially connecting a plurality of coefficient data segments having coefficients representing “0” and a plurality of coefficients having coefficients representing “1”. The “1” coefficient data DOM configured by sequentially connecting the coefficient data segments is formed as necessary.
[0084]
In the coefficient data selection section 86, when the control signal CK1 is supplied and the overflow detection signal COV is not supplied, the inverse coefficient data DKQ obtained from the inverse coefficient data forming section 87 is converted into the multiplication section shown in FIG. The coefficient data DKA supplied to the multiplier 40 shown in FIG. 3 is derived as the coefficient data DKA supplied to the multiplier 40 shown in FIG.
[0085]
When the overflow detection signal COV is supplied while the control signal CK1 is supplied, the “0” coefficient data DOZ and the “1” coefficient data DOM are formed, and the “0” coefficient data DOZ is shown in FIG. 3 is derived as coefficient data DKA supplied to the multiplier 40 shown in FIG. 3, and “1” coefficient data DOM is derived as coefficient data DKR supplied to the multiplier 40 shown in FIG.
[0086]
When the control signal CK2 is supplied, “0” coefficient data DOZ and “1” coefficient data DOM are formed, and the “0” coefficient data DOZ is a coefficient supplied to the multiplication unit 40 shown in FIG. In addition to being derived as data DKA, “1” coefficient data DOM is derived as coefficient data DKR supplied to the multiplier 40 shown in FIG.
[0087]
Further, when the control signal CK3 is supplied and the overflow detection signal COV is not supplied, the coefficient data DKO obtained from the data adder 84 is derived as coefficient data DKA supplied to the multiplier 40 shown in FIG. At the same time, the inverse coefficient data DKQ obtained from the inverse coefficient data forming unit 87 is derived as coefficient data DKR supplied to the multiplier 40 shown in FIG.
[0088]
When the overflow detection signal COV is supplied while the control signal CK3 is supplied, the “0” coefficient data DOZ and the “1” coefficient data DOM are formed, and the “1” coefficient data DOZ is shown in FIG. 3 is derived as coefficient data DKA supplied to the multiplier 40 shown in FIG. 3, and “0” coefficient data DOM is derived as coefficient data DKR supplied to the multiplier 40 shown in FIG.
[0089]
On the other hand, read control in which byte count output data DYC obtained from the byte counter unit 75, synchronous block count output data DLC obtained from the synchronous block counter unit 78, and track count output data DTC obtained from the track counter unit 80 are supplied. In the signal forming unit 77, a read control signal QR corresponding to each of the byte count output data DYC, the synchronous block count output data DLC, and the track count output data DTC is formed, which is shown in FIG. It is sent out to be supplied to the memory unit 33.
[0090]
In the specific example of the coefficient data forming unit 42 shown in FIG. 1 described above, the coefficient source data storage units 71, 72, and 73 have a plurality of data segments that are interleaved in the audio data DAA and the audio data DRA, respectively. Coefficient source data storage means for storing coefficient source data DCY, DCB, and DSC corresponding to the array state characteristics is formed, and the byte counter unit 75, the synchronous block counter unit 78, and the track counter unit 80 include audio data DAA. And a counting means for performing a counting operation in accordance with the array state characteristics of a plurality of data segments subjected to the interleaving process in each of the audio data DRA. In addition, the byte decoder unit 76, the synchronous block / track decoder unit 79, the data addition units 81, 84 and 85, and the latch units 82 and 83 are supplied from the coefficient source data storage unit according to the count result of the counting unit. The calculation means for calculating the coefficient source data obtained is formed, and the coefficient data selection control unit 86, the inverse coefficient data formation unit 87, and the overflow detection unit 88 are based on the calculation result obtained from the calculation means. Data output means for obtaining coefficient data DKA and coefficient data DKR supplied to the multiplier 40 is formed.
[0091]
The specific example of the coefficient data forming unit 42 shown in FIG. 1 is relatively simple and large for obtaining the coefficient data DKA and coefficient data DKR supplied to the multiplying unit 40. It can be formed with a circuit configuration that does not have a scale.
[0092]
【The invention's effect】
As is apparent from the above description, in the digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application, the multiplier Corresponding mutually between a plurality of data segments included in the digital data and a plurality of coefficient data segments included in the first coefficient data Mutual And a plurality of data segments included in the second digital data and a plurality of coefficient data segments included in the second coefficient data correspond to each other. Things And the multiplication output data based on the plurality of data segments included in the first digital data by the data adding unit is added to the multiplication output data based on the plurality of data segments included in the second digital data. The addition processing for obtaining the digital data for use is in a state in which the first digital data is subjected to interleaving processing for a plurality of data segments constituting the first digital data, and the second digital data constitutes the plurality of data segments constituting the plurality of data segments Since it is performed in a state where the interleaving process is performed on the data segment, from the time when the first digital data is read from the recording medium, the data from the data adding unit corresponding to the first digital data is read. It is necessary to supply digital data for editing to the data recording unit. Data processing time can be relatively short time, for editing digital data, the properly performed that the recording on the first position in which the digital data is read in the recording medium.
[0093]
A coefficient source data storage unit storing coefficient source data corresponding to the array state characteristics of the plurality of data segments subjected to the interleave processing in each of the first digital data and the second digital data; In accordance with the counting means for performing the counting operation according to the array state characteristics of the plurality of data segments subjected to the interleaving processing in each of the first and second digital data, the coefficient is determined by the calculating means according to the count result of the counting means. Coefficient data is obtained by calculating the coefficient source data obtained from the source data storage means, and obtaining the first and second coefficient data based on the calculation result obtained from the calculation means by the data output means. Simplification and downsizing of the circuit configuration of the forming unit can be achieved.
[0094]
Therefore, according to the digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application, a plurality of interleaved processes recorded on a recording medium are performed. For example, a part of the first digital data having a plurality of data segments can be appropriately replaced with the second digital data having a plurality of interleaved data segments, for example, by a crossfade technique. And the first coefficient data including a plurality of coefficient data segments respectively corresponding to the plurality of data segments subjected to the interleave processing included in the first digital data, which is necessary for the editing, and Interleave processing included in the second digital data was performed Second coefficient data including a plurality of coefficient data segments each corresponding to the number of data segments, so that can be formed and supplied by the coefficient data forming unit having the circuit configuration does not become relatively simple large.
[Brief description of the drawings]
FIG. 1 shows a specific configuration example of a coefficient data forming unit included in an edit unit in a digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application; It is a block connection diagram.
FIG. 2 is a block connection diagram showing an example of a digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application.
FIG. 3 is a block connection diagram showing a specific configuration example of an edit unit in the digital information recording / reproducing apparatus according to any one of claims 1 to 7 in the claims of the present application.
4 is a time chart used for explaining the operation of a specific configuration example of the editing unit shown in FIG. 3; FIG.
FIG. 5 is a time chart used for explaining the operation of a specific configuration example of the edit unit shown in FIG. 3;
FIG. 6 is a conceptual diagram showing an example of a recording format of a magnetic tape used with a digital VTR.
FIG. 7 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. 8 is a conceptual diagram showing an example of a data format of audio data recorded on a magnetic tape by a digital VTR.
FIG. 9 is a conceptual diagram illustrating an example of an interleaving process performed on a data segment of audio data.
[Explanation of symbols]
11 Reading Rotating Magnetic Head 14 Inner Parity Error Correction Unit 15 Outer Parity Error Correction Unit 16 Audio Outer Parity Error Correction Unit 18 Edit Unit 22 A / D Converter 23, 62 Digital Signal Processing Unit 24 Interleave Processing Unit 25 Control Block 32 , 37 Serial-parallel conversion unit 33, 60 Memory unit 34 Frame start end detection unit 35 Write control signal forming unit 38, 45 Audio data processing unit 39, 46 Attached information data processing unit 40 Multiplying unit 42 Coefficient data forming unit 43 Control signal Formation unit 50, 81, 84, 85 Data addition unit 54 Parallel-serial conversion unit
61 Deinterleave processing unit 63 D / A conversion unit 65 Outer parity addition unit 66 Inner parity addition unit 67 Recording amplification unit 68 Rotary magnetic head for recording 71, 72, 73 Coefficient source data storage unit 75 Byte counter unit 76 Byte decoder unit
77 Reading control signal forming unit 78 Synchronous block counter unit 79 Synchronous block / track decoder unit 80 Track counter unit 82, 83 Latch unit 86 Coefficient data selection control unit 87 Inverse coefficient data forming unit 88 Overflow detecting unit

Claims (7)

A data reading unit for reading first digital data including a plurality of interleaved data segments from a recording medium;
A data supply unit for supplying second digital data including a plurality of data segments subjected to interleave processing;
The plurality of data segments in the first digital data read by the data reading unit are written according to the interleave processing state, and the first digital data is read according to the arrangement state of the plurality of data segments in the second digital data. A memory unit for sequentially reading a plurality of data segments in one digital data;
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 coefficient data corresponding to a plurality of data segments in the second digital data, respectively. A coefficient data forming unit for supplying second coefficient data including a segment;
Multiplication of each other which corresponds to each other in a plurality of coefficient data segments contained in a plurality of data segments and the first coefficient data included in the first digital data read out from said memory unit, and, a second multiplication unit for performing multiplication processing on each other which corresponds to each other in a plurality of coefficient data segments contained in a plurality of data segments and the second coefficient data included in the digital data from the data supply unit ,
Data obtained by adding the multiplication output data based on the plurality of data segments in the first digital data obtained from the multiplication unit to the multiplication output data based on the plurality of data segments in the second digital data to obtain editing digital data An adder;
A data recording unit for recording the digital data for editing obtained from the data addition unit at a position where the first digital data supplied to the multiplication unit in the recording medium is read by the data reading unit;
With
The coefficient data forming unit stores coefficient source data storing means for storing coefficient source data corresponding to an array state characteristic of a plurality of data segments that have been interleaved in each of the first and second digital data, Counting means for performing a counting operation according to the array state characteristics of the data segment, computing means for computing the coefficient source data obtained from the coefficient source data storage means according to the count result of the counting means, and the computation A digital information recording / reproducing apparatus comprising data output means for obtaining the first and second coefficient data based on a calculation result obtained from the means. When the coefficient data forming unit the first and second coefficient data from the supplied, supply start time point of a plurality of coefficient data segments contained in each of said first and second coefficient data, the first It determined corresponding to a predetermined period in the digital data, corresponding to each other in a plurality of coefficient data segments contained in a plurality of data segments and the first coefficient data included in the first digital data in the multiplying unit multiplication of each other which, and the multiplication process for each other which corresponds to each other in a plurality of coefficient data segments contained in a plurality of data segments and the second coefficient data included in the second digital data Is started from the beginning of a predetermined period in the first digital data. 1 digital information recording and reproducing apparatus according. When the coefficient data forming unit the first and second coefficient data from the supplied, supply start time point of a plurality of coefficient data segments contained in each of said first and second coefficient data, the first determined without corresponding to a predetermined period in the digital data, with each other in a plurality of coefficient data segments contained in a plurality of data segments and the first coefficient data included in the first digital data in the multiplying unit multiplication processing for between corresponding ones, and multiplication for each other which corresponds to each other in a plurality of coefficient data segments contained in a plurality of data segments and the second coefficient data included in the second digital data The processing is started in the middle of a predetermined cycle in the first digital data. Digital information recording and reproducing apparatus according to claim 1, in which. Multiplication of each other which corresponds to each other in a plurality of coefficient data segments contained in a plurality of data segments and the first coefficient data included in the first digital data in the multiplying unit, and, the second a plurality of multiplication for each other which corresponds to each other in a plurality of coefficient data segment included in the data segment and the second coefficient data, digital data for editing obtained from the data addition unit included in the digital data Are obtained by performing cross-fade processing on the multiplication output data based on the plurality of data segments included in the first digital data and the multiplication output based on the plurality of data segments included in the second digital data. Claims 1, 2, or characterized in that Digital information recording and reproducing apparatus according. Interleaving the plurality of data segments contained in each of said first and second digital data, a plurality of regularity of arrangement of the plurality of data segments contained in each of said first and second digital data 2. The coefficient data forming unit, wherein the coefficient data forming unit includes a plurality of coefficient source data storing means each storing a plurality of coefficient source data corresponding to the plurality of regularities. Digital information recording / reproducing apparatus. Calculating means included in the coefficient data forming unit, to obtain a coefficient source data obtained by adding the combined sequentially added coefficients source data obtained respectively from the plurality of coefficients source data storage means, the coefficient source data the sum 6. The digital information recording / reproducing apparatus according to claim 5, wherein the digital data recording / reproducing apparatus is supplied to data output means included in the coefficient data forming section. Data output means included in the coefficient data forming section, a first coefficient data which the plurality of coefficient data segments are arrayed with a predetermined order, a plurality of coefficient data segment, the coefficient of the first coefficient data 7. The digital information recording / reproducing apparatus according to claim 1, wherein second coefficient data arranged in an order opposite to the arrangement order of the data segments is obtained.

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