JPH02130781A - Digital data recording device and digital data reproducing device - Google Patents

Abstract

PURPOSE:To instantaneously grasp the recording character of all the programs by generating TOC back data including the character corresponding to the character data recorded in the respective programs and storing it en bloc. CONSTITUTION:A control circuit 30 reads out a specified key code out of the inputted character of a first tune from a storage circuit 31 for controlling generates search character back data and transmits it to a subcode processing circuit 19. The circuit 19 makes the data successively inputted stored in a storage circuit 28 for subcode data as one back data. Next, the circuit 30 allows a magnetic tape 12 where the beginning of the first tune is searched to travel at a rated speed. Then, the TOC back data, etc., is read out from the circuit 28. The circuit 19 transmits the back data to a frame synthesis circuit 18 so as to record the back data on the subcode stored area on the magnetic tape 12 over one frame. By repeatedly executing such processing, the TOC back data is stored over the specified frame from the beginning of the first tune.

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a digital data recording device and a digital data reproducing device, such as a digital audio tape recorder, which record and reproduce PCM audio signals. [Background technology 1] DAT (digital audio tape recorder), which is being developed in recent years, has a subcode recording area for recording subcodes in addition to a PCM recording area for recording PCM audio signals. ing. As this subcode, various information such as the program time for each program, the tape absolute time from the beginning of the tape, and the program number are determined. Therefore, by reproducing this subcode, the user can learn these various pieces of information. Further, information called TOC is defined in the subcode. This TOC contains information about each program recorded on the magnetic chip, including the start time of the first program, the start time of each program,
Information such as the final time of the final program is set and recorded in the subcode recording area of the first program, and is recorded simply by playing back the first program recording section at the beginning of the magnetic tape. It is possible to grasp various information about each program. [Object of the Invention] The first object of the present invention is to provide a digital data recording device such as the above-mentioned DAT, which is capable of recording character data corresponding to each program in the above-mentioned TOC. 1 purpose. A second object of the present invention is to automatically record a TOC including characters by simply inputting characters corresponding to each program at once, and to record character data corresponding to the subcode recording area of each program. The object of the present invention is to provide a digital data recording device capable of recording. A third object of the present invention is to provide a digital data recorder that can automatically detect the beginning of each program and record the corresponding character data by simply inputting characters corresponding to each program all at once. The goal is to provide equipment. A fourth object of the present invention is to generate pack data as a search code and pack data as a text code from an input character string, change each pack item, and record it in a subcode recording area. The purpose of the present invention is to provide a digital data recording device. A fifth object of the present invention is to
An object of the present invention is to provide a digital data reproducing device capable of reading data and displaying corresponding characters. A sixth object of the present invention is to provide a digital data playback device that can change the pack items to be read during high-speed playback and constant-speed playback and display the character data recorded during each playback. It's about doing. [Summary of the invention] In order to achieve the above object, the invention according to claim 1,
TOC pack data including character data corresponding to each program is generated from character data corresponding to each program stored in the storage means, and this TOC pack data is recorded in a subcode recording area of the first program. The main point is what you did. Further, the invention according to claim 4 generates TOC pack data including character data corresponding to each input program, records it in the subcode recording area of the first program, and stores the character data for each program. The key point is that pack data is generated and recorded in the subcode recording area at the beginning of each program. Furthermore, the invention according to claim 6 is characterized in that character pack data is generated for each program from character data corresponding to each input program, and is recorded in a subcode recording area at the beginning of each program. The main point is what you did. In addition, the invention according to claim 2 provides pack data as a search code set to a first pack item and a pack data as a text code set to a second pack item from the character data of the input character string. The main point is that data is generated and recorded. Further, the invention according to claim 11 provides a method for storing data from a magnetic tape on which TOC pack data including character data is recorded.
The main point is that this TOC pack data is read and the corresponding characters are displayed. Furthermore, the invention according to claim 14 provides that the first
The character pack data set in the pack item is read and the corresponding characters are displayed. During constant speed playback, the second
The main point is that the character pack data set in the pack item is read and the corresponding characters are displayed. [Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 21. This example shows an example in which the present invention is applied to a rotating head type DAT (R-DAT).
The recorded program is a multi-oil audio signal. <Configuration of the Embodiment> FIG. 1 is a diagram showing each component of the R-DAT in blocks. In FIG. 13a and 1
3b, and this rotating drum 1
1, a magnetic tape 12 is wound obliquely over an angle of 90° during recording and reproduction. Further, 14 is an input terminal to which an audio signal to be recorded is applied, and 15 is an A/D that samples the audio signal applied from the input terminal 14 at a sampling frequency of, for example, 48 KHz and converts it into a 16-bit digital value. It is a converter. 16 writes the audio signal converted into a digital value into the PCM audio data storage circuit 17 while performing interleaving processing;
After adding an error correction code, a signal processing circuit 18 compresses the time axis and reads and outputs the PCM audio signal outputted from the signal processing circuit 16 and the subcode outputted from the subcode processing circuit 19, respectively. This is a frame synthesis circuit that synthesizes and outputs at the timing of the recording area. 20 is a modulation circuit that applies modulation suitable for magnetic recording to the recording signal output from the frame synthesis circuit 18, and 21 is a recording amplifier that amplifies the modulated signal and supplies it to the rotary heads 13a and 13b. Further, 22 is a reproducing amplifier that amplifies the reproduced signal read by the rotary heads 13a and 13b, 23 is a demodulation circuit that demodulates the reproduced signal amplified by the reproducing amplifier 22, and 24 is a demodulating circuit that demodulates the demodulated reproduced signal between the PCM recording area and the sub. This is a frame decomposition circuit that decomposes data into code recording area data and outputs the data. The PCM audio signal output from the frame decomposition circuit 24 is sent to the signal processing circuit 16, once written into the PCM audio data storage circuit 17, and subjected to error correction processing, followed by disputation interleaving processing and time axis processing. The data is decompressed and provided to the D/A converter 25. This D/A converter 25 restores the PCM audio signal to an analog audio signal, and this analog audio signal is sent to the amplifier 2.
After being amplified by 6, the sound is emitted by a speaker 27. On the other hand, during recording, the subcode processing circuit 19 creates a data format to be recorded in the subcode recording area from the storage contents of the subcode data storage circuit 28 and the subcode ID storage circuit 29, and outputs it to the frame synthesis circuit 18. At the same time, during playback, the subcode in the playback signal output from the frame decomposition circuit 24 is stored in the storage circuit 28.
and 29, and outputs the necessary data to the control circuit 30. This control circuit 30 is in charge of controlling the entire system, and sends and receives data to and from a control memory circuit 31, and also sends display data to a display device 33 via a display drive circuit 32 for various displays. Let them do it. Further, 34 is a silent period detection circuit that detects a silent period in a recording signal during recording and outputs a silent period detection signal to the control circuit 30, and 35 is controlled under the control of the control circuit 30, and is connected to a drum motor and a capstan motor. 36 is a mechanism section including various mechanical systems such as [Play] key, [Stop] key, [
R] key, [Pause] key, [Space] key, [Character] key, [Line feed] key, [Cursor] key,

[Fast forward]
key, [Rewind] key, [Character 1 key, [Correct]
This is a key input unit having various keys including a key, a [delete] key, a [TOC] key, an after-recording mode designation switch, and the like. FIG. 2 shows the state of tracks recorded on the magnetic tape 12L. On the magnetic tape 12, there are recording tracks with a predetermined inclination angle (approximately 6 degrees) as shown in the figure. As shown in FIG. 3, this recording track, on which data is recorded alternately and sequentially by 13b, has a PCM recording area of 128 blocks in the center, and a subcode recording area (SUB-1) of 8 blocks at each end. ，
5UB-2) is formed. In the PCM recording area, data obtained by PCM (pulse code modulation) the audio signal and adding an error correction code is recorded, and in the subcode recording area, as shown in FIG. 4, a sync code (8 bits),
W2 (8 bits) consisting of subcode ID and block address)
, Wt and W2, parity (8 bits), and subcode data (256 bits) are each recorded in eight subcode blocks. The subcode ID (8 beats 2 bits), the block address and the subcode 10 (8 beats 2 bits) are constructed as shown in FIG. 5, with two blocks as one unit. That is, in the subcode ID of the even numbered block, the upper 4 bits are used as the control ID and the lower 4 bits are used as the data In, and in the subcode ID of the odd numbered block, the upper 4 bits are used as PNO-10 (2), and the lower 4 bits are used as the data In. Bit is PNO ID (
3) is used. In addition, for the block address and subcode ID parts, the most significant bit is specified as "1", the upper 3 bits of the even numbered block are the format ID, the lower 4 bits are the block address, and the upper half of the odd numbered block is the format ID. The side 3 bits are PNO/ID (1)
, the lower four bits are used as the block address. Furthermore, as shown in FIG. 6, the third bit from the lowest among the four bits of the control seal ID is provided with a star ID, that is, 5T-ID, which serves as a cue control signal.
The T-ID is recorded as "1" over about 300 frames (about 9 seconds) at the beginning of each side. Also, the above PNO
-ID (1) to PNO-10 (3) record the absolute song number (001 to 799) of each side as a program number. Subcode data in the above subcode block (256
bits) consists of four pack data of 2 64 bits per l bar as shown in Fig. 7, and as shown in Fig. 7, the upper 4 bits of Pct of Pct-PCB of 1 byte and 8 bits are the pack data. PCB is assigned as a pack item for identifying the data contents of Pct to PO7 as a parity of data. The above pack items (4 bits) are shown in Figure 8. (roooo) has no information, rooolJ is the program time indicating the recording time of each program (song), ro. 10J is the absolute recording time from the beginning of the tape The tape absolute time ro 100J indicating the following is set in the TOC to be described later, and furthermore, in this embodiment, it is assumed that 1000J is assigned to the text character and rloloJ is assigned to the search character. In this embodiment, up to 80 characters can be recorded as subcode data for each program (song).Characters to be recorded include song title, singer name, song name, etc. As mentioned above, the subcode data is recorded as the back format data shown in Figure 7, but if the pack item that identifies the contents of this pack data is set to rloooJ, The pack data indicates a text character. The pack format of this text character is shown in Figure 9. That is, the upper 4 bits of PCI are pack item r1000J, and the lower 4 bits are rsORT indicating the contents of the included character data. and PO2
The upper 4 bits of rFMTJ indicate the code format of the character data itself, the lower 4 bits rADRJ indicate the address of the back, PC3 to PC7 are character data of 5 characters each with 1 character byte, and PCB is the above PCI to PC7. parity. Therefore, the character data for up to 80 characters is divided into 5 characters each from the beginning, resulting in a maximum of 16 pieces of text character pack data as shown in Figure 9! :J! l"ru, ,n(
7) If rADRJ is "000o" ~ rl'=111
J totZ6. Note that the above rsOHTJ is roo when the character data is a poem. IJ, if it is a singer name, it is set to roloJ, if it is a song title, it is set to roolJ, and if there is no need to specify it, it is set to ro 000J as a general code. Further, the rFMTJ is set to rooooJ when the character data is expressed in ASCII code, rooolJ when it is expressed in ISO code, and ro010J when it is expressed in JIS code. On the other hand, when the pack item that identifies the contents of the pack data is set to rloloJ, the pack data indicates the search character. The pack format of this search character is shown in FIG.
otoJ, and the lower 4 bits of PO2 are ro OOO
The back format is the same as the text character except that it is set to J. This search character includes only the first five characters of character data of a maximum of 80 characters corresponding to one program, and is used as a search code during playback. Therefore, the lower 4 bits of PO2 indicating the address are fixed as ro 000J. The above TOC will be explained. TOC (Table
of contents) is data corresponding to the table of contents of a magnetic tape recording program, and is recorded as pack data in the subcode data.If the pack item is set to ro 100J, the pack data will not include the TOC. It will be shown. The back format of this TOC is shown in Figure 11. That is, the upper 4 bits of Pct are the pack item r0100J, the next 4th bit is "0", and the lower 3 bits are the program number rPN.
01J, and the upper 4 bits and lower 4 bits of PO2
The bits are program numbers rPNO2J and rPNO
It is 3.1. Also, PO2 is rPOINTJ indicating the data content of this TOC, and PC4 to P
CB is "hour", "minute", "second" data, PO2 is data indicating the number of frames, and pca is the above PCI
It serves as parity for NPC7. However,
The data included in the TOC pack is identified by the rPOI NTJ as shown in FIG. 12. That is, r
PC when POINTJ is B O (10110000)
l The PNO (program number) of NPC2 is the total TOC
The time data of PC4 to PC7 are all "0"
, and rPOINTJ is A O (1010000
0), the PNO of Pct-PO2 indicates the first song number, the time data of PC4 to PC7 indicates the start time of the first song (program), and rPol NTJ indicates the start time of the first song (program).
99 (00000000~10011001) Noto! ! PNO of Pc1-PC2 is each song number, PC4-PC
Time data 7 indicates the start time of each side, and rho
PC1 when INTJ is A I (10100001)
~PNO of PC2 indicates the last song number, and time data of PC4 to PC7 indicates the final time of the last song.Furthermore, in this example, the definition of rPOI NTJ is extended and CA (1100
1010) and CB (11001011) when TO
It is assumed that the data included in the C pack is assigned to character data. The TOC pack data including this character data will be explained. In this embodiment, as described above, character data for a maximum of 80 characters is recorded in the pack data of pack item r1000J in one program. Character data corresponding to each program is also recorded as a TOC. In this case, the TOC back with rPOINTj set to CA will contain the first three characters of the maximum 80 characters of character data of one program, and the subsequent character groups will be divided into three characters and rP
This is included in the POC pack where OINTJ is set as CB. The format of the TOC pack containing this character data is shown in FIGS. 13(a) and 13(b), that is, rh. The TOC back in which INTJ is set to CA is as shown in Figure 13(a).
That is, rlloo 1010 J, the upper 4 bits of PO2 are [5ORTJ, the lower 4 bits are rFMTJ, PC5 to PC7 are character data for three characters, and pca is the parity of PC1 to PC7. The above “5ORTJ and rFMT” is a pack item r
As in the case of 1000J, each character's content and code format are indicated, and "rPOINT" is C
As shown in Figure 13(b), the TOC pack set to B has the same PCI, PO2, and PCB as other TOC packs, and the POINTJ of PO2 is CB, that is, rl
loo 1011 J, the upper 4 bits of PO2 are rsORTJ, the lower 4 bits are rADR,,+,
PC5NPC7 is character data for three characters. The above "5ORTJ indicates the content of the character, rAD
l'l'' indicates an address. In this case, a maximum of 80 characters are recorded in one program, the first 3 characters are included in the CA TOC pack, and the following characters are 3.
Since each character is separated and included in the CB TOC pack, rADRJ is ro 000J according to the order of the characters.
~rl 111J will be set in a circular manner. However, this TOC puff data is li! recorded in the subcode recording area of the first program on the tape,
Character pack data is recorded in the subcode recording area at the beginning of each program, and other pack data is recorded in the subcode recording area of each program. Note that four pieces of this pack data are allocated within the subcode block,
64 packs are recorded on one track, and 128 packs (of which 16 packs are error correction codes) are recorded on one frame (2 tracks). <Operation of the embodiment> Next, the operation of the above embodiment will be explained. Normally, by turning off the dubbing mode switch and operating the "record" key, the audio signal applied from the input terminal 14 is converted to PCM and recorded on the magnetic tape 12.
In this case, the silent period detection circuit 34 detects the silent period in the recorded signal, and if a silent period of -42 dB or less from the full scale level is detected for 4 seconds or more, the silent period is detected. Signal control circuit 30
Output to. The control circuit 30 determines that the falling edge of this detection signal is the beginning of the song, and sends a control signal to the subcode processing circuit 19. As a result, the subcode processing circuit 19 sends a cue control signal (ST) to the subcode ID storage circuit 29.
- ID) and store “1” as the song number PNO.
is stored while updating, and item r0001J ~
Each time data of ro011J is stored in the subcode data storage circuit 28 as data in the above-mentioned pack format under the control of the control circuit 30. Then, each storage circuit 28 and 2 at the timing of the subcode recording area.
By reading data from 9 to generate subcode block data and supplying it to the frame synthesis circuit 18, the PCM audio signal is recorded in the PCM recording area on the magnetic tape 12 in the track format shown in FIG. Codes are recorded in each subcode recording area. Also, by operating the "playback" key, the data recorded on the magnetic tape 12 is transferred to the rotary heads 13a and 13.
b, and the audio signal is restored to the original analog signal and emitted from the speaker 27. Furthermore, the subcode recorded in the subcode recording area is stored in the frame decomposition circuit 2.
4 and sent to the subcode processing circuit 19. The subcode processing circuit 19 sequentially stores the subcode data in the input reproduced subcode in the subcode data storage circuit 28, reads out the subcode data of the required item, and provides it to the control circuit 30. For example, item roo. The program time data of "A!" is displayed on the display screen a! via the display drive circuit 32. 33, and the program time is displayed on the display screen M33. Next, the case where character data is recorded as a subcode will be explained. Character data is recorded in an after-recording mode that is set by turning on the after-recording mode switch, and in this embodiment, character data for a maximum of 80 characters are recorded for each program. First, it is assumed that music for five songs is recorded in the PCM audio recording area on the magnetic tape 12 in the above-described recording format. The subcode recording area contains pack items ro010J from the beginning of the tape to the end of the tape.
The absolute tape time of , and the program time of pack item r0001J are recorded from the beginning to the end of each episode, and the start ID (ST-ID) and song number PNO are recorded in the first 300 frames of each episode. shall be. Further, it is assumed that all information in the subcode recording area is managed by the control circuit 30 in the normal reproduction state. However, the magnetic tape 1 on which the music for these five songs was recorded
2, input characters corresponding to songs 1 to 5 shown in FIG. 14, respectively. First, in order to input one character, turn on the dubbing mode switch, and press the [Character 1 key]. Up to 78 characters can be entered including spaces, including alphanumeric characters, numbers, and symbols. etc. [
Enter by using the [Character] key and the [Space] key to set the space between characters. If there is a mistake in character input, use the [cursor] key to specify the character to be corrected and input a new character. In addition to the song title, the characters to be input may include, for example, the singer's name and the first 78 characters of the poem. Each time you finish entering the characters for one song, press the [Line feed] key to enter the first line.
4. Input all the characters for the five songs shown in Figure 4 at once. [ When the [Playback] key is operated, the control circuit 30 executes the control shown in the flowchart of FIG. 15. That is, after the control circuit 30 rewinds the magnetic tape 12 to the beginning of the tape, it searches the beginning of the first song (step S1 in FIG. 15). This is done by detecting the 5T-ID recorded over a portion of 300 frames, and the magnetic tape 12 is played back from the beginning of the tape at the normal rated speed. During this period, the 5T-ID detected by the subcode processing circuit 19 and stored in the subcode ID storage circuit 31
This is done by reading and checking the M1g circuit 30. When the control circuit 30 locates the beginning of the first song, the control circuit 30 generates TOC pack data based on the input character key code stored in the control memory circuit 31. (step S2). At this point, when the music for five songs has been recorded, the ff
It is assumed that the information to be recorded as the TOC shown in FIG. 12 is stored in a predetermined area of the control storage circuit 31 under the control of the 1i control circuit 30. First, the control circuit 30 operates as shown in FIG. 13(a) based on the input character key code stored in the control memory circuit 31.
TOC pack data of the character shown in (b) is generated and sent to the subcode processing circuit 19. Therefore, the control circuit 30 is included in the TOC as a pack item.
rolooJ indicating ``0'', then ``rooooJ'' as PNOI, ``roooo'' as PNO2, PN
rooolJ as O3 (PNO indicates song number l),
rlloo 1010 J (=C
A), rooo(
N, ro 00 indicating ASCII code as FMT
Output 0J as Pct-PC4, each 8 bits 1 byte. Next, the input character rALLEGRO of the first song.
The key code of the first three characters of J, rALLJ, is read from the control memory circuit 31, converted to an ASCII code in which each character is 8 bits, and output, and the parity of 1 byte for the 7 bytes of data that has already been output is output. . The subcode processing circuit 19 stores the data (PC1 to PCB) sequentially input one byte at a time in the subcode data storage circuit 28 as one pack data. Control-path 30
For the following 3-character rEGRJ key code, the PC
-PC2 outputs the same data as above, and PC3's POI
NT is rlloo 1011 J (=CH),
PC4's 5ORT is rooooJ, ADH is rooo
After outputting lJ (=1), the 3-character rEGRJ key code is converted to an 8-bit ASCII code and output, and 1-byte parity for the 7-byte data that has already been output is output. The subcode processing circuit 19 stores the input PCI-PCB data in the subcode data storage circuit 28 as one pack data. Then, the PC1
~PC3 outputs the same data as for the above character rEGRJ, PC4's 5ORT is rooooJ, and ADH is ro.
After outputting oloJ (=2), the character rOJ and the "line feed" key code are converted to 8-bit ASCII code and output. In this case, the ASCII code for "line feed" is converted into two ASCII codes, carriage return (CR) and line feed (LF), and output. In addition, if the input characters are divided into 3 characters and there are less than 3 characters, the ASCII code "NULLJ"
(NL) is output. And this PC1~PCB
The data of 6 or more are also stored in the subcode storage circuit 28 as one pack data, and the input character r of the first song is
This means that the generation of character TOC pack data for ALLEGROJ has been completed. As mentioned above, the first three characters are POINT=CA17) shown in Figure 13(a).
It is generated in TOC back format, and each of the following three characters is the TOC of POINT=CB shown in Figure 13(b).
Addresses "rADR" are added in order from "1" and generated in hack format. In this way, character TOC pack data is similarly generated for each input character of the second to fifth songs. In addition, the TO already stored in the control memory circuit 31
Information to be recorded as C is also generated as the TOC back format shown in FIG. 11 for each POINT shown in FIG. 12. Next, the control circuit 30 generates character pack data based on the key code of the input character stored in the control memory circuit 31 (step S3). Input character for track “A”
LLEGRO'' key code is read out, text character pack data shown in FIG. 9 is generated and sent to the subcode processing circuit 19. That is, the control circuit 30 has rlooOJ indicating a text character as a pack item, 301'IT indicates rooooJ indicating a general-purpose code, FMT indicates rooooJ indicating an ASCII code, and address ADR indicates roO00.
As J, output PCI-PC2 data in 8-bit 1-byte increments.
" The first five characters rALLEGJ key code is read from the control memory circuit 31, and one character is 8 bits.
It converts into I code and outputs it as data of PC3 to PC7, and outputs 1-byte parity for the already outputted Pct-PC7. The subcode processing circuit 19 converts data (PCI-PCB) sequentially input one byte at a time into one
The data is stored in the subcode data storage circuit 28 as one pack data. The control circuit 30 reads the next character "RO" and the key code of "line feed" inputted as a delimiter between the characters of the first song, and outputs them as PCI-PCB data in the same manner as above. In this case, the address ADR is ro
It is output as O01J as data incremented from the previous time. In addition, the ASCII code for the "line feed" key code is a carriage return (
CR) and line feed (LF) are converted into two ASCII codes and output, and if there are less than 5 characters, A is output.
Outputs the SCII code rNULLJ (ML). In this way, the generation of text character pack data for the input characters of the first song is completed. Next, the control circuit 30 reads out the key code of the first five characters "ALLEG" among the input characters of the song from the control memory circuit 31, generates the search character pack data shown in FIG. 10, and generates the subcode. It is sent to the processing circuit 19. That is, the control circuit 30 selects "rlolo",s, which indicates the search character as a pack item. RT indicates general code rooooJ, FMT indicates AS
rooooJ indicating CII code, r as address
P ro 0004 indicating QJ, 8 bits per byte
0 to be output as data for C1 to PC2 Next, the key code of the first five characters "ALLEG" of the first song is read from the control memory circuit 31, converted to an ASCII code in which each character is 8 bits, and is output as data for PC3 to PC7. , and outputs 1-byte parity for PC1 to PC7 that have already been output. The subcode processing circuit 19 stores the sequentially input data (PC1 to PCB) in units of l bytes in the subcode data storage circuit 28 as one pack data. This means that the generation of search character pack data is completed. When the generation of TOC pack data and character pack data is completed in this way, the control circuit 30 executes control to record the TOC and the characters of the first song on the magnetic tape 12 (step 2 S4). At the tape starting end of the magnetic tape 12, a leader tape section is provided for optically detecting the tape end, as shown in FIG. 18, and a magnetic tape section is provided following this leader tape section. . The starting end is a lead-in area of a predetermined length, and the P
CM audio is recorded as silent. Each program (song) starts after about 1 second from this lead-in area.
is recorded. As described above, the ST-ID is recorded in the first 300 frames of each frame. T
The OC is recorded from the beginning of the first song, the search characters are recorded from the beginning of each 300 frames, and the text characters are recorded from the beginning of each. The control circuit 3o runs the magnetic tape 12, on which the starting end of the first song is cued, at the rated speed, and also controls the mechanism unit 35 to rotate the rotary drum 11, and controls only the subcode recording area. The subcode processing circuit 19 performs control so that the other areas are in the recording state and the other areas are in the reproduction state, and reads TOC puff data, search character pack data, and text character pack data from the subcode data storage circuit 2B. These pack data are sent to the frame synthesis circuit 18 at the timing of the subcode recording area, and the pack data is recorded on the magnetic tape 1.
The TOC pack data is recorded over one frame in the subcode recording area on the second track, and this process is repeated over and over, and as shown in FIG. 17, the TOC pack data is recorded over, for example, 33 frames from the beginning of the first song. Further, as shown in FIG. 16, the text character pack data is recorded in the same address order in two frames at a time, and the search character pack data is recorded continuously as shown in FIG. At this time, the control circuit 30
Information stored in (TOC stored when recording the song)
Pack data is generated by calculating data (program time, tape absolute time, tape running time) corresponding to each pack item ro001J, roo10J, and roolJ shown in FIG. 8 for each frame from the information to be recorded as At the same time, the 5T-ID is set to "1" and a control operation is executed so that the same subcode data as before dubbing is recorded together with the TOC and character data. When the above processing is executed and after-recording is performed in the subcode recording area over the first 300 frames of the first song, the process moves from step S5 to step S6. The process in step S6 is to fast-forward the magnetic tape 12 in the reproduction state and locate the beginning of the next song (second song). When the start of the second song is located, the control circuit 30 reads the key code of the input character for the second song from the control memory circuit 31, performs the same process as in the case of the first song, and creates a text character pack. Data and search character pack data are generated and sent to the subcode processing circuit 19 (step 57). Next, the control circuit 30
performs control to record the characters of the second song, and performs ad-recording to the subcode recording area over 300 frames from the beginning of the second song (step S8,
S9), after that, the process for recording a character at the beginning of each character (steps 56 to S9) is repeatedly executed, and this process is executed for each character input at once (step 310). This means that the dubbing process has been completed. Through the above-mentioned dubbing process, a TOC including character data is recorded on the magnetic tape 12 at the beginning of the first song in the state shown in FIG. 17, and character data is recorded at the beginning of each track in the state shown in FIG. recorded. When this magnetic tape 12 is played back by operating the [play] key,
While the recorded PCM data is reproduced and an audio signal is emitted from the speaker 27, the control circuit 30
The processing shown in FIG. 9 is executed to display TOC characters and text characters. That is, when the dubbing mode switch is turned off and the [playback] key is operated, the control circuit 30 controls the mechanism section 35 and each circuit to enter the tape playback state (step 511 in FIG. 19), and this playback state is changed to step 312. This continues until the end of the tape is detected or the [Stop] key is pressed. Detection of the beginning and end of the tape is performed by optically detecting a translucent leader tape section formed at the beginning and end of the magnetic tape.3 The control circuit 30 determines the output of a detector (not shown). It is done by doing. Thus, in the tape playback state, the subcode recorded in the subcode recording area is sent from the frame decomposition circuit 24 to the subcode processing circuit 19. The subcode processing circuit 19 stores the subcode ID data in the subcode ID storage circuit 29, and stores the subcode data with matching parity for each pack item, for example, the program time of pack item roooIJ, pack item roO104. tape absolute time,
The storage circuit 2 for subcode data is divided into text character data of pack item rlooOJ.
8 is memorized. In this reproducing state, the control circuit 3
0 gives a 5T-ID output command to the subcode processing circuit 19 (step 313), and it is determined whether the tape has reached the beginning position of track 6. Then, the 5T-ID recorded over 300 frames of the optical head portion of one surface is reproduced, and the subcode processing circuit 19 sends a 5T-10 detection signal to the control circuit 30. When the control circuit 30 receives the 5T-ID detection signal, the control circuit 30 executes the subcode processing circuit 1 as a process in step 314.
9 is given a PNO detection command, and the first song (PNO=
1). When PNO=1 is detected, the subcode processing circuit 19 sends a detection signal to the control circuit 30. The control circuit 30 determines that the current tape position is the start of the first track, and selects the TOC.
Processing for reading the pack data is performed. This is because the pack item is "0100" in the pack data sequentially stored in the subcode data storage circuit 28 during playback.
This is a process in which POINT gives an instruction to the subcode processing circuit 19 to sequentially output packed data of CA and CB. Subcode processing circuit 1
9 receives this command and stores the subcode data storage circuit 2.
The character TOC pack data stored in 8 is sequentially outputted to the control circuit 30. The control circuit 30 is
The character data of PC5 to PC7 in this pack data is converted into display data and stored in the display register of the control storage circuit 31. In this case, Pct-PO2
In addition to storing each song number based on the PNO of
The control circuit 30 uses the character control memory of the TOC already read in the process of step S15, starting with the character data of CA in the POINT of PC, 3, and thereafter storing the character data of POINT and CB in address order. The TOC characters are sequentially sent from the display register of the circuit 31 to the display device 33 via the display drive circuit 32 to display the TOC characters (step 516). In this case, in the TOC display area of the display device 33, for example, Characters are displayed for each song number, such as. The TOC character data includes all song titles on all recorded sides, so this T. By displaying the C character, all recorded song titles can be easily recognized at once. The control circuit 30 also informs the subcode processing circuit 19 that the pack item is rlooo.
J text character pack data to address rA
DR'' gives an instruction to sequentially output from ro O00J (step 517), subcode processing circuit 19
In response to this command, the subcode data storage circuit 28
The corresponding pack data stored in are sequentially outputted to the control circuit 30. The control circuit 30 converts the character data of PC3 to PC7 in the text character pack data into display data and stores it in the control storage circuit 31.
This text character pack data to be stored in the display register of is recorded in a multiplexed manner with two frames of each pack data as shown in FIG.
It has sufficient redundancy to allow error-free reproduction during constant speed reproduction. Next, as processing in step 518, the control circuit 30 sequentially sends the character data already read in the processing in step 317 from the display register of the control storage circuit 31 to the display device 33 via the display drive circuit 32, and sends the character data already read in the processing in step 317 to the display device 33 via the display drive circuit 32. Displays the character. This display of text characters continues until the text character pack data of the next song recorded at the beginning of the song is newly read and displayed in the next step S17, as shown in FIG. While a song is being played, the character corresponding to the song name is always displayed. Note that from the second song onward, only text characters are displayed by the process of step 314, and if the end of the tape is detected by the process of step 512 during playback, the control circuit 30 controls the mechanism section 35. Tape running is stopped (step 519). On the other hand, characters can be displayed even when the tape is running at high speed. When the [fast forward] key or the [rewind] key is operated with the dubbing mode switch in the OFF state, the control circuit 30 executes the control operation shown in the flowchart of FIG. 20. As a process in step 520, the control circuit 30 controls the mechanical unit 35 and each circuit to set a high-speed playback state in which the tape is transferred at 100 times the speed. Note that when the [Fast Forward] key is operated, the tape is fed in the forward direction, and when the [Rewind] key is operated, the tape is fed in the reverse direction. Thus, in the high-speed playback state, the subcode recorded in the subcode recording area is sent from the frame decomposition circuit 24 to the subcode processing circuit 19. The subcode processing circuit 19 stores the subcode ID data in the subcode ID storage circuit 29, and stores the subcode data with matching parity for each pack item, for example, the program time of pack item roo01J, pack item roO10J. The data is stored in the subcode data storage circuit 28, such as the tape absolute time of , and the pack item rlo10J(7) search character data. This high-speed playback is performed in step S.
The control circuit 30 continues until the end of the tape or the operation of the [stop J key is detected in step 21, and then the control circuit 30 issues a command to the subcode processing circuit 19 to output the search character pack data of the pack item rlo10J. When the subcode processing circuit 19 receives this command and there is corresponding pack data stored in the subcode data storage circuit 28 (step 322),
This is output to the control circuit 30. The control circuit 30 controls PC3 to PC7 in this search character pack data.
This search character pack data is converted into character code luxury display data and stored in the display register of the control storage circuit 31 (step 523).
As shown in FIG. 6, since the pack data is multiplex recorded over 300 frames, there is sufficient redundancy to allow error-free reproduction during high-speed reproduction. That is, during high-speed reproduction, the rotary heads 13a and 13b scan across a plurality of diagonal recording tracks as shown in FIG. The multiple recording of search character pack data over 300 frames is long enough to reliably reproduce the data of any one of the trats even during head scanning during such high-speed reproduction. Next, the control circuit 30 sequentially transfers the character data already read in step 323 from the display register of the control storage circuit 31 to the display device 33 via the display drive circuit 32.
to display the search character. This character display continues until the next steps 327 and 528 read and display new character data as a search code for the next song recorded at the beginning of the song. By repeating this operation (steps 520-324), the character data recorded during high-speed playback is displayed one after another, and by displaying characters during high-speed playback,
The user can know in a very short time what songs are recorded on this tape. The magnetic tape 12 on which the search character data is recorded in this way makes it possible to search by song title. In this case, the dubbing mode switch is turned off, the first five characters of the song title to be searched are input using the [Character] key, and the [Character Data] and [Play] keys are operated. The data of the first five letters of the input song title are stored in the control storage circuit 31 under the control of the control circuit 30. Further, the control circuit 30 controls the mechanism section 35 to transport the magnetic tape 12 at a speed of, for example, 100 times, and during this time, the rotary heads 13 and 14 reproduce data. The subcode processing circuit 19 inputs the data of the subcode recording area in the reproduced signal, and when the search character pack data with the pack item rloloJ is input, the control circuit 30 inputs the character data of PC3 to PC7 in the pack data. Send to. The control circuit 30 compares the received reproduced character data with data obtained by converting the first five characters of the song title stored in the control storage circuit 31 into ASCII code, and finds matching reproduced character data. At the time when the magnetic tape 12 is sent, the transport of the magnetic tape 12 is stopped, the beginning of the 5-ID is located, and then the playback is performed.This makes it possible to search for a desired song title. Note that the recording of the TOC in the above-mentioned dubbing mode was performed based on the character data input by the [Character] key of the key input section 36, but the TOC was not recorded and only the character data of each side was recorded. It is also possible to record a TOC including character data on the magnetic tape recorded on each optical head without first inputting characters. In this case, all recorded portions of the magnetic tape are played back in advance in a normal playback state, the text characters recorded at the beginning of each side are read over the entire surface, and each part is stored in a predetermined area of the control storage circuit 31. In this state, turn on the dubbing mode switch and operate the [TOC] key. As a result, the control circuit 30 executes the control shown in the flowchart of FIG. 21. That is, the control circuit 30 rewinds the magnetic tape to the beginning of the tape and then cues the beginning of the first track (the 21st track).
Figure step 328), cueing the beginning of the first song is as follows:
This is done by detecting the 5T-ID recorded over the first 300 frames of the song.
Play the magnetic tape from the beginning of the tape at the normal rated speed,
During this period, the 5T-ID detected by the subcode processing circuit 19 and stored in the subcode ID storage circuit 31
This is done by the control circuit 30 reading out and checking. When the control circuit 30 locates the beginning of the first song, the control circuit 30 then selects T based on information such as text characters stored in the control storage circuit 31. To generate C pack data (step 527), the control circuit 30 first generates the data in FIGS.
) is generated and sent to the subcode processing circuit 19. Furthermore, information to be recorded as a TOC already stored in the control storage circuit 31 is also stored at each POIN shown in FIG.
The TOC pack format shown in FIG. 11 is generated for each T. Next, the control circuit 30 generates character pack data based on the text character data of the first song stored in the control storage circuit 31 (step 328).
This process generates the text character pack and search character pack data shown in FIGS. 9 and 1θ from the stored text character data of the first song. When the generation of TOC park data and character pack data is completed in this way, the control circuit 30 executes control to record the TOC and the characters of the first song on the magnetic tape (step 529). When 300 frames have been recorded (step 530), the post-recording process for only the TOC is completed. [Effects of the Invention] As described above in detail, according to the invention as claimed in claim 1, characters corresponding to character data recorded in each program can be recorded all at once as a TOC. T. By simply reading C, recorded characters for all programs can be instantly grasped, and operability is greatly improved by using them for single cue selection, display, etc. Further, according to the invention as claimed in claim 4, by simply inputting the characters for each program all at once, it is possible to automatically record the TOC including the characters and the characters for each program, and input them individually. This eliminates the need for the complicated operation of recording the data, and greatly improves operability. Furthermore, according to the invention set forth in claim 6, by simply inputting the characters for each program all at once, it is possible to automatically record the characters for each program, and to manually cue each program and record the characters individually. The complicated operation of inputting and recording characters is no longer necessary, and operability is greatly improved. Further, according to the ninth aspect of the invention, pack data as a search code and pack data as a text code are generated from the input character, and each pack item is changed and recorded. Even if the number of frames that can be recorded is limited, the search code and text code can be recorded in the same frame, increasing the degree of freedom when recording and allowing you to take the appropriate recording mode for each. Furthermore, there are many excellent advantages such as an increase in the number of characters that can be recorded as a text code. Furthermore, according to the eleventh aspect of the invention, TOC pack data including characters can be read and displayed.
The user only needs to play back the TOC recorded part to see the TOC.
By looking at the C display, there is an advantage that the recorded character can be grasped instantly. Furthermore, according to the fourteenth aspect of the invention, the pack items to be read are changed during high-speed playback and during constant-speed playback, and the characters recorded during each playback are displayed.
There is an advantage that character data can be reliably read during any playback.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a diagram showing the recording tracks on the magnetic tape in this embodiment, FIG. 3 is a diagram showing the format of one track in FIG. 2, and FIG. 4 is a diagram showing the format of one track in FIG. 3. A diagram showing the format of one block of subcode, Figure 5 shows the subcode ID in the same subcode block.
FIG. 6 is a diagram showing the format of the control ID in the same subcode ID. FIG. 7 is a diagram showing the format of the pack data recorded in the subcode data of FIG. 4. The figure shows the pack item table showing the contents of the pack data according to each pack item of the pack data in Figure 7, Figure 9 shows the pack format when the pack item is set as a text character, and Figure 1θ shows the pack item search. The pack format when set to a character, Figure 11 is the pack format when the pack item is set to TOC, Figure 12
The figure shows the TOC data table showing the data contents according to each POI NT of the TOC, Figures 13 (a) and (b) show the TOC pack format when the TOC POINT is set to CA and CB, and Figure 14 shows the data contents for each POI NT. FIG. 15 is a flowchart showing an outline of the control processing of the control circuit in the dubbing mode, FIG. 16 is a diagram showing the recording and display state of character data, and FIG. 17 is a diagram showing the recorded contents of TOC. Figure 18 is a diagram showing the recording position of each data on the magnetic tape, Figure 19 is a diagram showing the recording position of each data on the magnetic tape.
The figure is a flowchart showing an overview of the control process of the control circuit during constant speed playback, Figure 20 is a flowchart showing an overview of the control process of the control circuit during high speed playback, and Figure ff121 is the control process of the control circuit when recording only TOC. It is a figure showing an outline. 11... Rotating drum, 12... Magnetic tape, 13a, 13b... Rotating head, xa.
... Frame composition circuit, 19 ... Subcode processing circuit, 24 ... Frame decomposition circuit, 3
0...control circuit, 33...display device,
36...Key input section. Patent application filed Casio Computer Co., Ltd. 10 Figure SB SB / Ma-Tsuku Format Figure 7 Figure 8-Tsuku Item Figure SB 5B TOC Pack Formant Figure TOC Day Figure 5B LSB Figure (a) Figure (b) Figure 4a Kimafukuda I1 Figure 14 - Irriguku data collection (surprise 1v.

Claims (1)

[Claims] (1) It has a PCM recording area and a subcode recording area,
A digital data recording device for rewriting a subcode recording area of a magnetic tape in which digital data for a plurality of programs is recorded includes a storage means for storing character data corresponding to each program, and a storage means for storing character data corresponding to each program; Recording means for generating TOC pack data including character data corresponding to each program from character data corresponding to each program, and recording the TOC pack data in a subcode recording area of the first program. A digital data recording device featuring: (2) Claim 1, wherein the storage means stores character data corresponding to each program input twice by an input means for inputting characters.
Digital data recording device as described. (3) Character data corresponding to each program is recorded in the subcode recording area of the magnetic tape, and the storage means stores character data corresponding to each program obtained by reproducing the subcode recording area. The digital data recording device according to claim 1, characterized in that: (4) It has a PCM recording area and a subcode recording area,
PCM digital data for multiple programs is the above PCM
In a digital data recording device that rewrites the subcode recording area of the magnetic tape where the control signal for cueing is recorded in the recording area and the subcode recording area at the beginning of each program, the character an input means for inputting a character (character); a storage means for storing character data corresponding to each program inputted by the input means; a first recording means for generating TOC pack data each containing corresponding character data and recording said TOC pack data in a subcode recording area of a first program; and a character corresponding to each program stored in said storage means. From the data, character pack data including character data corresponding to each program is generated, and the beginning of each program is detected using the cue control signal, and the character pack data corresponding to the program is transferred to the program. A digital data recording device comprising: second recording means for recording in a subcode recording area from the beginning of the subcode. (5) The TOC pack data mentioned above has different identification codes depending on whether it contains the character data of the predetermined number of characters at the beginning of the character string corresponding to one program and the character data of the following characters. 3. The digital data recording device according to claim 1, wherein the digital data recording device generates a digital data. (6) It has a PCM recording area and a subcode recording area,
PCM digital data for multiple programs is the above PCM
In a digital data recording device that rewrites the subcode recording area of the magnetic tape where the control signal for cueing is recorded in the recording area and the subcode recording area at the beginning of each program, the character an input means for inputting a character (character); a storage means for storing character data corresponding to each program inputted by the input means; In addition to generating character pack data including the corresponding character data, the beginning of each program is detected using the cue control signal, and the character pack data corresponding to the program is stored at the beginning of the subcode recording area of the program. 1. A digital data recording device, comprising: a recording means for recording data from a part; (7) The above character pack data includes search character pack data containing character data of a predetermined number of characters at the beginning of an input character string for one program, and text character pack data containing character data of the entire input string divided into predetermined number of characters. 7. The digital data recording device according to claim 2, wherein the data is generated using different pack items. (8) The digital data recording device according to claim 7, wherein the search character pack data is recorded in a subcode recording area in which a cue control signal is recorded. (9) In a digital data recording device that records on a magnetic tape having a PCM recording area and a subcode recording area, a plurality of pack data containing character data of an input character string divided into parts of a predetermined number of characters can be stored. a control operation that causes the same pack data set in the first pack item to be continuously recorded for a predetermined frame as a search code when generated and recorded in the subcode recording area of the magnetic tape; Consecutive characters set to 1
At least 1 set of packed data as a text code
A digital data recording device comprising a recording control means for performing a control operation to sequentially record frames frame by frame. (10) The digital data according to claim 9, wherein the recording control means causes the pack data as the search code to be continuously recorded for a predetermined frame from the beginning of the recording program together with a cue control signal. Recording device. (11) Digital data for multiple programs is recorded in the PCM recording area and subcode recording area, and character data is included in the subcode recording area of the first program.
A digital data playback device that plays back a magnetic tape on which OC pack data is recorded reads the TOC pack data that includes the above character data recorded in the subcode recording area of the first program during playback, and retrieves the corresponding character data. What is claimed is: 1. A digital data reproducing device comprising: a detection means for detecting character data detected by the detection means; and a display means for displaying a corresponding character based on character data detected by the detection means. (12) The TOC pack data mentioned above has different identification codes depending on whether it contains character data for a predetermined number of characters at the beginning of a character string corresponding to one program or character data for subsequent characters. 12. The digital data reproducing apparatus according to claim 11, wherein the character data is recorded on the magnetic tape, and the detection means detects character data corresponding to the original continuous character string based on the identification code. (13) The TOC pack data is recorded on the magnetic tape in a state including character data corresponding to each recorded program together with a program number, and the detection means detects character data corresponding to each program number. 12. The digital data reproducing apparatus according to claim 11, wherein the display means displays characters corresponding to each program number. (14) The same pack data consisting of the character data set in the first pack item is continuously recorded as a search code for a predetermined frame, and a plurality of pack data consisting of the character data set in the second pack item Pack data is at least 1 as text code
A subcode recording area in which frames are sequentially recorded, and P
In a digital data reproducing device that reproduces a magnetic tape having a PCM recording area on which CM data is recorded,
During high-speed playback, the pack data set in the first pack item is read and the corresponding characters are displayed, and during constant speed playback, the pack data set in the second pack item is read and handled. 1. A digital data reproducing device comprising display control means for displaying characters.