JP2667151B2 - Recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for recording information for locating a reproduction position, and is particularly applied to a recording device or an editing device such as an audio PCM tape recorder or a disc recorder. Things. [Summary of the Invention] Either a detection signal when the level of a reproduction signal from a reproduction apparatus becomes equal to or lower than a predetermined value or an editing synchronization signal generated by an operation for instructing a synchronous operation between the reproduction apparatus and the recording apparatus is output. This is a recording device that generates a cue signal when it occurs and records it in a subcode area, thereby eliminating the need for a troublesome work of assigning a cueing program number at the time of reproduction for each recording program. [Prior art] A digital audio tape recorder using a rotary head performs high-density recording at a low tape speed such as 8 mm / s, so that a high-speed search of 200 times or more of a normal speed is possible, for example, 60 minutes. The recording tape can be caught in 9 seconds or less. The high-speed search is performed with reference to a cue signal (start ID) and program number data in a subrecord area provided outside the PCM data area of each diagonal track. The cue signal is recorded in the subcode area at the beginning of the program (song), is represented by data "1" occupying one bit at a specific position in the subcode area, and is "0" during the song. The program number data is a monotonically increasing order number, and is set for each program by data input means such as a numeric keypad. In order to increase the detection probability of these cue data during high-speed search, sub-code areas are provided at both the start and end of the diagonal track, and the same cue is found in a plurality of blocks (for example, 8 blocks) forming each sub-code area. Multiple recording to write data is performed. Further, a large amount of cue data is written in each subcode area over a track of about 300 frames (about 9 seconds) at the beginning of the program. The data in the subcode area of the tape on which the audio PCM signal was recorded can be freely rewritten, and this function can be used to automatically reorganize the program numbers (auto renumbering function). In order to perform auto renumbering, it is necessary to previously record a cue signal (start ID) or temporary program number data at the beginning of the program. [Problems to be Solved by the Invention] However, it is very troublesome to perform the recording operation of the start ID and the program number every time the recording of the program is started. Further, it is difficult to record a program number as a continuous number while incrementing it by +1 according to the storage, and the program number at the time of the previous recording must be left in a memo or the like. In particular, it is quite difficult to perform such management for each tape on which programs of different genres are recorded. SUMMARY OF THE INVENTION In view of this problem, an object of the present invention is to enable automatic recording of a cue signal without performing a complicated operation. [Means for Solving the Problems] FIG. 1 shows that a reproduction signal supplied from a reproducing apparatus (for example, a compact disk player) is recorded in a recording data area on a recording medium, and the recording data on the recording medium is recorded. Digital audio recording system operation data is recorded in a subcode area provided separately from the area.
A recording device such as a tape recorder is disclosed. Level detection means 12 for determining whether or not the input level of the reproduction signal from the reproduction apparatus has become lower than a predetermined level, and editing generated in response to operation of operation means for instructing synchronous operation between the reproduction apparatus and the recording apparatus. And an output signal from the level detecting means 13 and an output signal from the above-mentioned editing synchronous signal detecting means 13 are input. One of these output signals is generated. And a sub-coat generating means 8a for generating a cue signal when
The cueing signal generated from the subcode generating means 8a by the recording means is recorded in the subcode area of the recording medium. [Operation] When a substantially silent portion occurs between music pieces or when an editing synchronization signal used for synchronized operation between the playback device and the recording device is generated, a cue signal is automatically generated by detecting these. Since recording is performed in the subcode area, there is no need to perform complicated management and recording operation of the program number for each music piece, and the editing work becomes easy. FIG. 1 is a block diagram of a main part of a rotary head type audio PCM tape recorder showing an embodiment of the present invention. The rotary head drum 1 includes two channels of heads HA and HB. The porcelain tape 2 wound on the reels 3 and 4 in the tape cassette is wound on the drum 1 at a wrap angle of about 90 ° and driven by the capstan 5 and the pinch roller 6. Drum 1, reel 3, 4 and the capstan 5 is driven by a respective motor _{M 1, M 3, M 4} , M 5. A rotation detection signal of each motor and an operation signal from a key input unit 7 are given to a system controller 8, and a drive circuit 9 for a reel, a rotating drum, a capstan and a pinch roller controls the speed of each motor and a pinch roller plunger by the control output. , Direction, on / off, etc. The audio signal is recorded and reproduced by digital processing by an A / D and D / A conversion circuit 10 and a PCM process circuit 11. FIG. 2 shows a recording format on the tape 2.
A PCM area is provided at the center of each track T, and a subcode area SUB and a pilot signal recording unit ATF for auto tracking are provided at both ends. The subcode area is used for recording management data such as a program number, a time code (track address of hour, minute and second), an index, additional recording of audio, recording of a still image, and the like. The third A, B, and C indicate the data format of the subcode, and are expressed in units of one block (288 bits) shown in A.
Each subcode area at both ends of each track in a block
SUB is configured. 256 bits in one block are allocated to subcode data + parity, followed by an 8-bit block synchronization signal SYNC and subcode ID data
W ₁ , block address + subcode ID data W _2, and parity are added. The subcode ID (Identification) data W ₁ , W ₂
The configuration shown in FIG. 3B, wherein the LSB of the block address is
Is “0”, the control ID, data I
D, format ID is the contents of the W _1, W _2, the address L
In the block where SB is “1”, 3 digits (11 bits)
Program number data PNO-1 to PN represented by BCD code
O-3 is the contents of the W _1, W _2. The control ID (4 bits) is used for tape control, and as shown in FIG. 3C, one bit (2 LSB) is used for a cue signal called a start ID. The 1-bit start ID “1” indicates the beginning of the program (song), and “0” indicates the middle of the program (song). The program number data [PNO-1, -2, -3] represents [001] to [799] in 3 digits. In the subcode area for each of the eight blocks at the beginning and end of the track, the start ID "1" is alternately applied to the blocks.
And the program number data are written. The subcode including the data for cueing is multiplexed and written over about 300 frames (about 9 seconds) at the beginning of the program. The subcode is formed in a subcode generator 8a incorporated in the system controller 8 as shown in FIG. 1, and is added to PCM data recorded in the PCM process circuit 11. The subcode generator 8a includes a counter in the program number, and under the control of the subcode controller 8b,
The program number is incremented. As will be described later, the subcode controller 8b performs a key input operation from the key input unit 7, a detection of a recording input signal level by the level detection circuit 12, and an editing from the outside (for example, a compact disc player) by the editing synchronization signal detection circuit 13. The sub-code generator 8a is controlled by detecting the use synchronization signal SYNC. The level detection circuit 12 discriminates, for example, that the input level has fallen below a certain threshold level based on the digital output of the A / D and D / A conversion circuit 10, and detects a substantially non-input state. Things. The output of the level detection circuit 12 is supplied to the system controller 8 via the changeover switch 14. When the editing synchronization signal detecting circuit 13 detects an editing synchronization signal such as a pause release signal from the outside, it generates a detection output S and switches the changeover switch 14, and outputs the editing synchronization signal SYNC via the changeover switch 14. To the system controller 8. Therefore, when the output of the level detection circuit 12 and the output of the edit synchronization signal detection circuit 13 are simultaneously present, the latter output has priority. Note that the subcode generator 8a and subcode controller
8b is actually realized by a microprocessor and its embedded program. Next, the recording operation of the subcode (cue data) in the system of FIG. 1 will be described. FIG. 4 is a connection diagram in the case where the contents of a disc are edited on a tape using the compact disc (CD) player 16 and the PCM tape recorder 17 (FIG. 1) of the embodiment. The CD player 16 receives the power-on flag POF from the tape recorder 17 and becomes in a synchronous relationship. From the CD player 16, a silent recording signal REC-MUTE and a pause release signal PR, which are editing synchronization signals called a CD sync, which will be described later, are supplied to the tape recorder 17 together with an audio output. FIG. 5 is a flowchart showing processing steps of cueing data recording (automatic numbering), and FIGS. 6 and 7 are corresponding time charts. As shown in FIG. 5, first, the initial value of the program number is set using the numeric keypad of the key input unit 7 in the first recording pause state (5-1, 5).
-2). Next, when the pause release is detected in the judgment 5-3,
In the recording mode, the above-mentioned start ID and program number data are recorded for 300 frames (9
(For 5 seconds). At this time, if the program time has been input, this time data is also recorded. Next, when the pause button of the key input unit 7 is pressed during recording and the second and subsequent recording pause operations are performed (decision 5-5),
Silence recording is performed for 3 seconds, and a pause state is set (process 5).
-6). Next, when a pause release signal is detected in determination 5-7, the program number PNO is automatically incremented by one in step 5-8, and then in step 5-4 (start ID,
The same operation as in the recording of the program number data as a cue signal) is performed). When the CD player 16 is operated to make a pause as shown in FIG. 6B, first, the silent recording signal REC-MUTE shown in FIG. 6A is led out to the tape recorder 17. When this is detected in the judgment 5-9 in FIG. 5, the above-described processing 5-6 is performed, and after mute recording for 3 seconds is executed as shown in FIG. Stop). When the pause of the CD player 16 is released in order to record the next music, the pause release signal PR shown in FIG. 6C is sent to the PCM tape recorder 17 to be in a recording state (REC) as shown in FIG. 16 is also in the reproduction state (PB) as indicated by B. At this time, when the pause release signal is detected by the determination 5-7 in FIG. 5 as in the above, the program number PNO + 1 is incremented and the number is changed from n to n + 1 as shown in FIG. -8) Further, as in F, recording of the start ID, program number data, and the like is performed over 300 frames from the start of recording (processing 5-4). As shown in FIG. 7A, when recording an FM broadcast or the like, the input signal level between songs is substantially zero (threshold level T _L
In the following case, the level detection circuit 12 in FIG. 1 detects this (judgment 5-10 in FIG. 5). At this time, as shown in FIG. 7B, the detection circuit 12 detects for a short time that the level is below the threshold level _TL even at the normal level zero cross. However, in the subcode controller 8b shown in FIG. 1, the width of the comparison pulse shown in FIG. 7C is compared with the width of the level determination output. Figure D) is generated. In response to the detection pulse, the subcode generator 8a performs a process of incrementing the program number by +1 as shown in FIG. 7E (process 5-8 in FIG. 5). Then, in this case, while the recording operation is continued, the cue data such as the start ID and the program number is recorded over 300 frames as shown in FIG. 7F (processing 5-4). After an input signal of a certain level or less has continued for a certain period of time, when a signal of a certain level or more is received, increment of a program number and recording of cue data may be performed. When the record button of the start ID in the key input unit 7 in FIG. 1 is operated (decision 5-11 in FIG. 5), the processing 5-8 is also performed.
The program number is incremented and the cue data of process 5-4 is recorded. Also, when the recording forward button is operated after temporarily setting the stop mode, the increment of the program number and the recording of the cue data are similarly performed. As a method of high-speed search using the cue data recorded as described above, there are a relative address access and an absolute address access. In the case of the relative address type, the number of skipped songs is input from the key input unit 7 in FIG. 1, and the fast forward button or the rewind button is pressed. Then, a search at 200 times speed is started, and the system controller 8 counts the start ID bit “1” in the subcode obtained from the PCM process circuit 11, and adds the start ID bit “1” from the current song to the beginning of the song skipped by the number of skipped songs. To stop the tape. In the case of the absolute address type, the music selection program number is input from the key input unit 7, and the search start button is pressed. Then, the system controller 8 reads the program number data in the sub-code while performing a 200-times speed search, and stops the tape at a position corresponding to the music selection number. Alternatively, both relative address access and absolute address access may be used. In this case, the difference between the designated program number and the program number at the current position is calculated, and the start ID is counted until the difference becomes equal to or less than a certain value (for example, 2 or less). Access), and then switch to absolute address access to access the beginning of the target program while reading the program number. The cue data (start ID and program number data) once recorded in the subcode area as described above
Is played back over the entire length of the tape of one cassette, and if it is not related to the track address (segment address of the hour, minute, and second frame), a table of each program and the corresponding track address at the head position, that is, a program table as an index, It can be created in the memory of the system controller 8. Therefore, based on this program table, for example, renumbering for rewriting discontinuous program numbers to continuous numbers can be executed. [Effect of the Invention] As described above, the recording device of the present invention generates an editing synchronization signal used when a substantially silent portion occurs between songs during editing or when the playback device and the recording device are synchronized. When
By detecting these, a cue signal is automatically generated and recorded in the subcode area, so that it is not necessary to perform complicated management and recording operation of the cue signal for each editing program (song). Can be easily edited to create editing software that can be accessed at high speed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rotary head type audio PCM to which the present invention is applied.
2 is a block diagram of a recording format on a tape, FIGS. 3A to 3C are data format diagrams of subcodes, FIG. 4 is a connection diagram between a CD player and a PCM tape recorder, and FIG. Is a flowchart showing processing steps for cueing digital recording, FIG. 6 and FIG.
It is a time chart corresponding to each process of a figure. In addition, in the reference numerals used in the drawings, 1 ... rotating head drum 2 ... magnetic tape 3, 4 ... reel 5 ... capstan 6 ... pinch roller 7 ... key input unit 8 ... system controller 8a ... sub Code generator 8b Subcode controller 9 Drive circuit 10 A / D and D / A conversion circuit 11 PCM process circuit 12 Level detection circuit 13 Edit synchronization signal detection circuit 16 Compact Disc player 17 PCM tape recorder.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Tadao Yoshida               6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo So               Knee Co., Ltd.                (56) References JP-A-60-193172 (JP, A)                 JP-A-60-261085 (JP, A)                 JP-A-60-193188 (JP, A)

Claims (1)

(57) [Claims] A recording apparatus that records a reproduction signal supplied from a reproduction apparatus in a recording data area on a recording medium and records data for system operation in a subcode area provided separately from the recording data area on the recording medium. A level detecting means for determining whether or not an input level of a reproduced signal from the reproducing apparatus has become equal to or lower than a predetermined level; and a level detecting means for operating the operating means for instructing a synchronous operation between the reproducing apparatus and the recording apparatus. Editing synchronization signal detecting means for detecting the editing synchronization signal to be output, and an output signal from the level detecting means and an output signal from the editing synchronizing signal detecting means as inputs, and one of these output signals is A subcode generating means for generating a cue signal when it occurs, and a cue signal generated from the subcode generation means recorded in the subcode area A recording device comprising: 2. The sub-code generating means includes a program number updating means for updating a program number when one of an output signal from the level detecting means and an output signal from the editing synchronization signal detecting means is generated, 2. The recording apparatus according to claim 1, wherein a program number is recorded in said subcode area.