JPH0244590A - After-recording method for rotating type digital audio tape recorder - Google Patents

Abstract

PURPOSE:To process the sub code information of reproducing without confusion and to improve the reliability of operation by recording the new sub code information and a priority signal. CONSTITUTION:An input sound signal is processed by a digital signal processing circuit 2 and after that, sent to a recording amplifier 6 by time sharing together with servo signals and the sub code information from a servo signal generating circuit 3 and a sub code generating circuit 4. In full recording, the priority signal is set to an initial value and recorded to the idle area of a sub code area and the new sub code is recorded to the prescribed position. In partial recording, the priority signal of the sub code area is latched by the reproducing and sub code after-recording or increment is executed in correspondence to the presence and absence of the priority signal.

Description

[Detailed Description of the Invention] The industrial application of the present invention is to record each track formed on nine tapes by a rotating head type Digimel audio table recorder (hereinafter referred to as R-1 AT). The present invention relates to a method of after-recording only a subcode area (hereinafter referred to as post-recording).

Conventional technology Conventionally, on R-DAT''C, each signal is time-divisionally recorded in each area of each track of a tape that is helically scanned by a rotating head. n,′f converted to PGM signal at the center of the trace of the track
c) A PCM area (P) for recording information such as music is formed, and a tracking area ('rib (T2)) is formed on both sides of this PCM area (1), and a subcode area (Sl) is formed on both sides of the PCM area (P). (82).(4th
(see figure).

Tracking signals for performing area-divided tracking control are recorded in the tracking areas (T1) and (T2), and subcode areas (Sl), (
S1) records subcode information such as start identification information indicating the beginning of the song along with song number information and absolute time information indicating the cumulative time from the beginning of the tape.

Furthermore, R-DAT is characterized in that it is possible to perform post-recording in which only the subcode area is later overwritten, regardless of the PCM area and the tracking area.

Regarding the method of dubbing only the subcode area, see Zenkai No. 62-2989B6 (011B27/2
There is one shown in B).

(c) Problems to be Solved by the Invention However, although it is fine when dubbing the entire subcode information recorded in the subcode area (Sl), (82), only a part of the content of the subcode information is recorded. If you want to change or add content, for example, play back the subcode area (111) at the start of the track, change or add a part of the content of the subcode information, and then add the subcode area (111) at the end of the track. We adopted a method similar to after-recording in the subcode region (S) and (Sl).
The content of 1) may be slightly different, and if they are different for the same subcode information, it is difficult to know which information to trust, and intermediate works such as display using subcode information, high-speed search, etc. There was a problem in that AJvJ production was likely to occur.

B) Means for Solving the Problems The present invention provides a PCM area for recording digitally converted music signals, etc. in the center of the trace of a track on a magnetic tape that is helically scanned by a rotating head, and a PCM area on both sides of the PCM area. In a rotary head type digital audio tape recorder that forms a tracking area in which servo signals for tracking control are recorded and a subcode area at the beginning and end of the trace of the track, the subcode area is recorded separately from the PCM area and the tracking area. Ara 1-vs-F' at a certain period by repeating playback and recording of a part.
When recording, the first priority number 43 is recorded together with the new subcode in the subcode area to be after-recorded, and if the core ← first pipe tip signal is obtained by playback, the first priority number 43 is recorded together with the subcode. This paper proposes an after-recording method for a rotary head type digital audio tape recorder, which is characterized in that a second tip signal obtained by incrementing the first tip signal is recorded in a subcode area.

(E) Effect According to the above configuration, when performing after-recording to change or add part of the contents of the subcode area, a new subcode is added to distinguish between the played subcode area and the post-recorded subcode area. When dubbing the information, a Kfi signal is attached, and if the 1st signal is latched in the 9th subcode area during playback, new subcode information is after-recorded along with the 1st signal that is incremented from the 9th subcode area. I did it like that.

(f) Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows a specific system configuration of the R-DAT of the present invention and will be described. In the figure, (11 is an input terminal into which an analog audio signal is input, i21 is a digital signal processing circuit that converts this audio signal into a digital signal (PCM modulation) subjected to interleaving, time compression, etc.,
1 is a servo signal generation circuit that generates servo signals for dragging control (i.e., pilot signals, shift signals, etc.), and (4) is a start ID for high-speed search as well as track number and performance time information below C. , a subcode signal generation circuit that generates subcode information such as P timebi], (5)
is a switch circuit that is selectively switched at a predetermined timing to record digitally converted audio signals, servo signals, and subcode information in the information recording area, tracking area, and subcode area formed on each track of the tape. , (61 is a recording amplifier, (71 is a rotary transformer of a rotary head cylinder that supplies the output from the recording amplifier (6) to two recording and reproducing rotary heads (8; 180 degrees apart and with different azimuths), (91i reproducing amplifier , (1 (l is the output from the reproduction amplifier (9)?! - Digital signal processing that creates a rip from the playback data using P L L etc., converts it to a digital signal, and then converts it to an analog signal (PCMV style) Circuit, (1) 1 is the output terminal from which the original analog audio signal is output.A7JU playback amplifier (
9) A servo circuit that extracts all servo signals from the output for tracking control and generates a tracking error signal;
(Starts by extracting a subcode signal from the output of the 131rt Niu amplifier i91) This is a subcode processing circuit that detects ID and reads P time, etc. And L1
41 is a take-up motor that directly drives the take-up reel/sleeve, (151 is a supply reel motor that directly drives the supply reel axis t, (, lbl motor, drive circuit,
+171i181 is a cylinder motor and its motor drive circuit, uli, 101 is a capstan motor and its motor drive circuit. 12]+ is operated by each motor t141Q:17)[1! J's drive/stop,
This is a control circuit that controls the rotation speed, rotation direction, etc., and is implemented by a microcomputer. Q2 is a tape that is wrapped 90 times around the rotating head cylinder.

Therefore, during recording, first, the voice (No. 1) input to the human input terminal (11) is converted into digital No. 1Δ by the digital signal processing circuit (2), and then the servo signal (pilot signal) from the servo signal generation circuit (3) is and sync signal, etc.] and subcode information (start ID, track number, P time) generated by the subcode generation circuit (4) are sent to the recording amplifier f61 in time and minutes. (6)
The output of the rotary head cylinder rotary transformer (
71, and is recorded on the tape by the recording/reproducing rotary head (81).At this time, a track pattern as shown in Fig. 4 is formed on the tape, and the central part of each track is An information recording area jd(P) is formed on both sides thereof, and a dragging area (Tl) (T2) and subcode areas (81) and (82) are formed on both sides thereof, respectively.

Next, during playback, various signals recorded on the tape 2z are read by the recording/playback rotary head (8) and sent from the rotary transformer (71) of the rotary head cylinder to the playback amplifier (9). Amplifier (9)
The output is digital (N processing circuit [113 uses PLL etc. to generate a clock from the data), which converts it to a digital signal, which is then converted to an analog signal, becomes the original audio signal, and is output from the output terminal (111). Furthermore, the output of this reproducing amplifier (9) is connected to the servo circuit C.
121, where the servo signal for tracking control is extracted and a full tracking error signal is generated.
This signal is sent to the purple motor drive circuit I to control the capstan motor tliJ. The output of the playback amplifier i91 is also sent to the subcode processing circuit t131, where the subcode 1f information is extracted, the track number, time information, etc. are read, and the output is sent to the display section through the control circuit 211i. The entire time is displayed.

Next, subcode after-recording when a portion of subcode information is changed, deleted, or added Dt will be explained with reference to the flowchart shown in FIG.

Note that this is different when dubbing all the contents of the subcode area with the area other than the subcode area in the playback mode (referred to as full-scale recording). The rotary head (8) reproduces the subcode areas (Sl), (Sl) of the track traced, and the -azimuth recording/playback rotary head (8) reproduces the subcode areas (81), (82) of the track traced. )
When dubbing only the subcode area (Sl) on the trace start side of each track: Playback El, .
The case of dubbing the subcode area (Sl) on the trace start end side (referred to as partial recording) will be explained in particular detail.

First, the subcode dubbing mode is designated using the operation keys (step 1). Then, using the operation keys, the subcode area to be dubbed is designated as either full recording or partial recording (step 2).

When full-page recording is designated by the operation key in step 2, the priority signal is set to an initial value, for example, a 5-bit signal (OOH) (step 3). Then part 6
The bit signal is recorded in an empty area such as the subcode data area (256 bits) of the subcode area as shown in FIG. 6, and a new subcode is recorded at a predetermined position (step 4). Then, the recording, that is, the subcode dubbing is completed, and the process ends (step 58. Also, when the partial recording state is specified by the operating gear in step 2, first, the priority signal of the subcode area is latched for reproduction ( Step 6). In step 6, it is determined whether the priority signal exists (step 7). If the signal is not latched, subcode dubbing is performed in the same manner as in steps 5 and 4. When all priority signals are latched, the priority signal is incremented (step 8).For example, if the signal is (00t(), it is incremented to (01H).Then, the incremented signal (011H) is incremented.
) and new subcode information are recorded in a predetermined subcode area (step 4). Then, the recording, that is, the subcode after-recording is performed in a predetermined frame, and the process ends (step 5).

The above operations are pre-programmed and run on nine microcontrollers (
It is all controlled by the 2v (controller) circuit.

(G) Effects of the Invention According to the present invention, when after-recording the subcode area t, the priority signal t is recorded together with the new subcode information, so the new subcode information that was after-recorded is not after-recorded. In order to ensure that the old subcode information is used for display cutting and high-speed search operations, etc., the reproduced subcode information can be processed without confusion, and the reliability of masterpieces using subcode information is improved. 9, which is extremely beneficial.

[Brief explanation of the drawing]

FIG. 1 is a 7o-chart showing the after-recording 7R of the present invention, FIG. 2 is a block diagram showing the system U4 configuration of the present invention, and FIG. 5 is a block diagram of the subcode area of the R-DAT track format. Inside! Diagram showing i4 Ebisu,
Is Figure 4 the R-DAT track format? FIG. (P)...PC'M area, ('l)(T2>
...Tracking area, (81) (82)...Subcode area, (8)...Rotary head for recording and playback.

Claims (1)

[Claims] (1) A PCM area for recording digitally converted music signals, etc. in the center of the trace on a magnetic tape that is helically scanned by a rotating head, and a servo signal for tracking control on both sides of the PCM area. In a rotary head type digital audio tape recorder that forms a tracking area to be recorded and a subcode area at the beginning and end of the trace of a track, apart from the PCM area and the tracking area, a part of the subcode area is created by repeating playback and recording. When after-recording is performed periodically, the first priority signal is recorded together with a new subcode in the subcode area to be after-recorded, and when the first priority signal is obtained by playback, the first priority signal is recorded together with the subcode. An after-recording method for a rotary head type digital audio tape recorder, characterized in that a second priority signal obtained by incrementing a first priority signal is recorded in a subcode area.