JPH01273286A - Post-recording system for rotary head type tape recorder - Google Patents

Abstract

PURPOSE:To prevent erasure of sub-code information recorded before post- recording by post-recording information produced by adding absolute time information indicating integrated time to the sub-code information in a sub-code area. CONSTITUTION:When a post-recording operation is instructed, a tape 1 is rewound to its starting point. Then the reproduction mode is set and whether or not the track is the first track is discriminated while the sub-code information (reproducing sub-code information) recorded in the 1st sub-code area S1 is stored. When the track is discriminated as the first track, presence of a reproducing sub-code is discriminated and information is produced by adding absolute time information to the reproducing sub-code information and post-recorded in the 2nd sub-code area S2 on the same track. Therefore, the absolute time information can be recorded continuously over the entire area of the 2nd sub-code area without damaging already recorded sub-code information when the absolute time information is post-recorded.

Description

Detailed Description of the Invention (Kozue Industrial Field of Application) The present invention provides after-recording (hereinafter referred to as after-recording) of the subcode area of the next tape recorded by a one-rotation head type digital audio tail coder (hereinafter referred to as R-DAT). (2) Conventional technology Conventionally, in R-DAT, each signal is time-divisionally recorded in each area of each track of a tape that is helically scanned by a rotating head. Specifically, a PCM area (LP) for recording information such as music converted into a PCM signal is formed at the center of the trace of each track, and tracking areas are formed on both sides of this PGM area (CP). (T1) (T2) f, furthermore, subcode regions (Sl) (82) are formed on both sides.-1 (Refer to 5th material)
, and this tracking region (Tl)(T2)
To do this, use a trafking system using area-divided ATF.
ATF signals are recorded in the subcode area (Sl),
In (S2), subcode information such as start identification information indicating the beginning of the song is recorded together with song number information and absolute time information indicating the cumulative time from the beginning of the tape. Regarding the method of recording absolute time in the subcode area, see Japanese Patent Application Laid-open No. 62
There is something shown in Publication No. 266788 (Gl 1B27/28), in which only the subcode area is overlapped later, regardless of the R-DATTHPCM area and the tracking area! ! ◎ e-9 @ Akira tries to solve this problem 110 However, conventionally, when dubbing absolute time information in the subcode area, it is possible to perform dubbing that is recorded before the dubbing. The disadvantage is that the code information disappears (9) Ninth way to solve the problem In the present invention, PCM information such as music is added to the center of each track of a tape that is helically scanned by a rotating head.
The entire CM region is formed, first and second subcode regions are formed on the trace start end side and the trace end side with the core PCM region sandwiched therebetween,
In a rotary head type tape recorder that records all of the start identification signal indicating the head of the program based on the PCM information in this subcode area, the first subcode area on the trace start side is reproduced. while storing the subcode information recorded in the subcode area, and generating information by adding all the absolute time information indicating the cumulative time from the verbal time of the tape to the subcode information,
llt composition so as to after-record the information in a second sub-code area on the trace end side.

(rt4 action According to the above configuration, when dubbing all the absolute time information in the subcode area, all the absolute time information is added to the subcode information without erasing the subcode information recorded before dubbing, and from the beginning of the tape. Continuous dubbing is possible at the end 1 of the recording section □(f) Embodiment A first embodiment of the present invention will be explained below with reference to all figures 1 to 4 of the mouth surface. In the figure showing the configuration of the DAT, reference numeral 11 is a magnetic chip 1 which is in pressure contact with a capstan 12, has a pair of magnetic hoods attached at an interval of 180 degrees, and is wound around a nine-turn cylinder 13+ at a predetermined angle.

A capstan motor I4I that drives the punishment cylinder 1 stan 12+ and a cylinder motor 151c that drives the cylinder +3+i, respectively, are connected to the capstan servo circuit 1 (
ij and cylinder servo circuit +7+Vr- are connected, and are driven according to the output of the servo circuit. Similarly, reel motor 1llI[lI+ is connected to both reel shafts that fully drive the supply reel (81) and take-up reel (91) Furthermore, the reel servo circuit q3 is connected to the Tanabata (131"i) system control circuit, which is composed of a microcomputer and is connected to the reel servo circuit f6j17+
(121, input device for transmitting and receiving signals to and from the spinal signal processing circuit 'tXIr■, etc.) It is supplied to the circuit α3, and its operation mode signal etc. are supplied to the display device oe.

This α41 signal processing circuit is configured to operate as follows. When recording, A/D conversion circuit Cl7
A deisotalized audio signal from 1 is input, the signal is temporarily stored in the RAM (181), and is added to subcode information. After error correction processing such as interleaving is performed at a predetermined timing, the signal is stored in the RAM (181). The signal is output to amplifier circuit σ9.

During playback, the next signal output from the amplifier circuit a9 is input, error correction processing such as de-interleaving is performed, the audio signal and subcode information are decoded at a predetermined timing, and the audio signal is sent to the D/A conversion circuit (
20).

In addition, (2D is A provided for tracking control)
The TF circuit generates a tracking control signal during playback, and the tracking control signal controls the rotational speed of the capstan 41 through the capstan servo circuit 16+'i. The circuit control circuit 9 has a built-in switch that switches between recording or playback in response to the number 1 from the system control circuit α3, and a switching circuit that alternately switches between the two magnetic heads. □ Now, as shown in Fig. 3 (a), the user writes the song into 300 frames of the subcode area (81) (32) corresponding to the beginning of the song in the PCM area on the magnetic tape +11. Start identification information (hereinafter referred to as 5-ID) indicating all the start positions of the song, track number information indicating the order of the songs (hereinafter referred to as 5-ID,
performance time information indicating the performance time of the song (hereinafter referred to as
Three pieces of subcode information are recorded in the subcode area (815 (S2), 300 frames of the magnetic code area 815 (S2)). Subcode area (81)
The case where all the absolute time information is dubbed continuously from the beginning of (32) to the end information indicating the end of recording will be explained according to the flowchart in Figure 2.0 First, the user will dub the absolute time information. If you select the channel 1u+ (see (aJ) in Figure 3) and specify all dubbing operations, if the channel 7"+1+ is not completely rewound, it will rewind to the beginning of the tape □ Next, the playback mode ( Step 1) Input Q, first subcode area (Sl
), and determines whether it is the first track (step 12) while memorizing the subcode information (hereinafter referred to as playback subcode information) recorded in the track (step 12). Then, it is determined that the playback subcode information is “present” (step 3), and information (hereinafter referred to as first subcode information) in which absolute time information is added to the playback subcode information is generated (step 3). 4) L-
After-recording (step 5) is performed in the second subcode area (E32) in this first subcode information t1m-tq (in this case, the first track). If it is determined that the track is not a track, it is determined whether there is end information in the playback subcode information of the track immediately before the track (step 6), and if the end information is "None".
If it is determined that the reproduction subcode information is present, the presence or absence of the reproduction subcode information is determined in the same manner as described above (step J13), and if it is determined that "11 exists", the first sag code information is generated (step 4), and the stage If it is determined that J7 is 3 and 6 is absent, only absolute time information is generated (step 7), and the first
Subcode information or absolute time information is dubbed (Stella 15) in the second subcode area of the same track.

Next, if it is determined in step 6 that the end information is "1", then the presence or absence of the end information is determined (Stella 18), and if it is determined that it is "present" (i.e.

Generating first subcode information by adding absolute time information to reproduction subcode information including the end information from the second track of the first subfood area where the end information is recorded to the track m later (step 4); After-recording the information into the second subcode area within the same track (step 5)
)do.

MayuIf the end information is detected in step 16 above, and no end information is detected in step 8 above, the dubbing operation ends.In addition, if the end information is not recorded on a tape, the end information is not recorded until the end of the tape is reached. The operation ends ^ Also, the @1 subcode area (81) in the same track described in 1.
Generate subcode information and generate second subcode area (S2)
Nine pulses corresponding to the second sub-code area (S2) as shown by the mark 1 in FIG. It is.

In addition, Fig. 4 III shows two rotation/hood switching pulses,
121 is a simplified diagram of the envelope 1 waveform, and FIG. 3(b) is a schematic diagram showing the recorded state of the subcode area on the tape after the dubbing of the present invention has been performed.

(G) Effects of the Invention According to the present invention, when dubbing absolute time information as described above, the absolute time information is continuously recorded over the entire second subcode area without damaging the already recorded subcode information. Since time information can be recorded, functions such as high-speed search can be reliably performed using all absolute time information, which is advantageous.

[Brief explanation of the drawing]

Figures 11 to 4 show all embodiments of the present invention.
Figure 1 Rotating head tape recorder (hereinafter referred to as R-DA)
FIG. 2 is a flowchart for explaining its operation.

Claims (1)

[Claims] (1) PCM that records PCM information such as music in the center of each track of a tape that is helically scanned by a rotating head.
A start area is formed, and first and second subcode areas are formed on the trace start and end sides sandwiching the PCM area, and in this subcode area, a start line indicating the head of the program based on the PCM information is formed. In a rotary head tape recorder that records an identification signal, etc., while reproducing the first subcode area on the trace starting end side, the subcode information recorded in the subcode area is stored, and the subcode information recorded in the subcode area is stored. Generates information by adding absolute time information indicating the cumulative time from the beginning of the tape to the code information,
An after-recording method for a rotary head tape recorder, characterized in that the information is after-recorded in a second sub-code area on the trace end side.