JPS615489A - Pcm recording/reproducing device - Google Patents

Abstract

PURPOSE:To attain stable reproducting even if the additional recording is applied after manual splicing edition by recording signals having no continuity due to manual splicing edition by means of a new time base. CONSTITUTION:When the manual splicing edition is executed at recording on a tape below a half of a channel, recorded data is broken in the vicinity of the manual splicing edition, and the discontinuity of synchronizing signals occurs. When the sound recording is executed on an idle track of the tape in such condition, an edited point detection circuit 6 detects the edition. A new correction code and synchronizing signal are added 11 to a reproduction signal, which comes to have the continuity in terms of music by an edition processing circuit 7, through a switch 14 used at recording of sounds with use of the tape subjected to the manual splicing edition through a time base conversion circuit 8, and the reproduction signal is recorded on other idle track. On the other hand, after the signal necessary to be recorded again is A/D converted, the correction code and synchronizing signal, both of which have the same time base reference as that of the signal after the manual splicing process, are added to the signal necessary to be reconded, which is recorded in the track where it is previously recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hand-cut editing processing method for a PCM recording/playback device having multiple channels.

[Prior art]

Music recording using a multi-channel POM recording/playback device (
Generally speaking, microphones are set up for each instrument and recorded separately on each track (in cases where two recording methods are used, rhythm instruments such as drums are recorded first, and then the best parts of them are recorded. A piece of music is created by cutting and gluing the tapes together to create a piece of music.Next, vocals and other parts are recorded along with the edited music on the empty channel C2, which has not yet been recorded. A method is used to complete master tapes of records, broadcast programs, etc.

When a recorded tape is edited by hand in a PCM recording/playback device, the data near the hand-cut editing point (11) is destroyed as shown in Figure 1. The position will be different from normal.

For this reason, a method is used that creates a corrupted data part from the correct data before and after the editing point and interpolates it, which leads to smooth musical abuse. Figure 2 shows the reproduced waveform showing that the data destroyed by hand-cut editing is connected by interpolation (2), (3) is the waveform reproduced from the correct data, and (41 is the waveform created by interpolation). On the other hand, if the synchronization signal is edited by hand and the time interval is shifted, the playback servo will be disconnected if it is left as it is.
For example, a method is used in which the phase of the reference signal is switched, so that the reproducing servo does not become disconnected.

On the other hand, with a multi-channel POM recording/playback device, it is necessary to record a new music signal while playing back the previously recorded signal in an empty channel of a hand-cut edited tape. There was a problem in that it was not possible to achieve ambivalence through processing alone.

[Summary of the invention]

This invention was made in order to eliminate the above-mentioned problems, and by transferring the recorded signal that has undergone manual editing processing to the recording track together with the newly recorded signal, and recording. The object of the present invention is to provide a PC, M recording/playback device that enables recording onto a tape after hand-cutting and editing.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. Third
In the figure, (5) is the playback signal input terminal, (6; is the hand-cut editing point detection circuit, (7) is the editing processing circuit, (81 is the time axis conversion circuit, and (9) is the digital-to-analog conversion circuit. , the song is the output terminal for the analog signal, αυ is the correction code and synchronization signal addition circuit, (I is the recording circuit, and the output terminal for the recording head is I, which is used when recording using a hand-cut tape. (l!9 is the recording signal input terminal, (1119 is an analog-to-digital conversion circuit.

Also, Figure 4 shows the recording format for the tape (
Lη is a track on which the POM signal is recorded together with the synchronization signal (21).

Now, when a POM recording/playing device having the system shown in FIG. 3 is used to record less than half of the channels covered by the POM recording/playing device, the recording pattern shown in FIG. 4 will be obtained. If hand-cut editing is performed in this state, as shown in FIG. 5, in the vicinity of the hand-cut 9 editing point T1.1, not only the recorded data will be destroyed, but also discontinuity of the synchronization signal will occur. When recording is performed on an empty track on the tape in this state, the edit point detection circuit (61) detects the edit, and the editing and collection processing circuit (7) C2 detects musical continuity. The playback signal that has become a signal with a time axis (conversion circuit ) is added and recording is performed on another vacant trunk.Meanwhile, signals that require new recording are converted from analog to digital (06).
After that, a correction code and a synchronization signal having the same time axis reference as the signal after the manual cutting process described above are added, and the track where the previous recording was made is recorded. This state i& is shown in FIG. In FIG. 6, the track (17 has
The hand-cut edited signal is recorded, and a new music signal is recorded on track 08). In this way, the signal after editing processing is recorded with the addition of synchronization (No. 8) based on the new time axis, so as shown in Figure 6, discontinuity of the synchronization signal at the hand-cut editing point , and stable playback can be performed.

In the above embodiment, a method is used in which the edited signal is transferred to another track, but due to the arrangement of the recording head and playback head, the edited signal with a changed time axis can be recorded on the same track. The same effect can be obtained with this method.

〔Effect of the invention〕

As described above, this invention employs a method of re-recording signals that have lost continuity due to hand-cut editing (2) on a new time axis, so even if additional recording is done after hand-cut editing, it will not be stable. It has the effect of regenerating.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the state of the tape after manual editing, FIG. 2 is a diagram showing the playback signal obtained by editing processing, FIG. 3 is a diagram showing an embodiment of the present invention, and FIG. 5 is a diagram showing the state when the tape having the recording format of FIG. 4 is manually cut and edited, and FIG. 6 is a diagram showing the recording state of the tape obtained by the present invention. +11...Hand-cut editing point, (2)...Sync signal, 1
31...Waveform reproduced from the correct waveform, (41...
・Waveform reproduced from interpolated digital. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] In a PCM recording and playback device that has two or more channels of recording and playback functions, the signal after hand-cutting editing processing is performed on a new time axis, and the digital signal is transferred to another unrecorded track. A POM carrier sound reproducing device characterized in that a POM carrier sound reproducing device performs transfer in a state.