JPH02172381A - Recorder - Google Patents

Abstract

PURPOSE:To simplify dubbing by providing a detection means of a picture feed signal and moving a recording head till the succeeding recording position when a picture feed signal is detected so as to record an audio signal. CONSTITUTION:When a picture feed signal synchronized with an audio signal is inputted during the recording, a picture feed signal detection circuit 48 detects it or a corresponding picture is switched by a track moving switch in a switch group 44, an audio signal of an audio memory 15 is recorded while a flag and a control code representing consecutive track are added. Then a magnetic head 31 is moved immediately to the succeeding picture track. When the audio signal corresponding to one track is stored in the audio memory 15, the flag and the control code representing consecutive track are added and the result is recorded on an idle track of the magnetic disk 32. Thus, dubbing is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a recording device in a recording system that can record audio and still images in association with each other.

[Prior Art] Conventionally, as a recording system of this type, there is a still/video recording system, in which a small magnetic floppy disk is used to store 50 field images and 2 frame images.
It is possible to record five images, and furthermore, it is possible to record a mixture of video signals and audio signals, and it is also possible to associate a specific audio signal with a video signal.

Therefore, in this recording system, by recording an audio signal corresponding to a video signal, it is possible to listen to music and audio while displaying a still image on a monitor screen.

When creating such a floppy disk containing a mixture of video and audio, a so-called audio dubbing is generally used in which the video is recorded first and the audio signal is recorded later. Specifically, at the stage of recording a video signal, the number of tracks necessary for the recording time of the corresponding audio signal is made in advance.
Record the necessary video signals in sequence. Thereafter, audio signals corresponding to the video signals are sequentially recorded for a predetermined period of time by audio dubbing. This allows multiple videos and corresponding audio to be recorded on a single floppy disk.

[Problems to be Solved by the Invention] Conventionally, however, when performing audio dubbing, if the narration or music is directly recorded using the dubbing machine, failures such as mistakes in the narration or exceeding the specified recording time tend to occur, and it is necessary to redo the recording. (7 took a lot of time.

As a countermeasure for this, you can use a tape recorder etc. to
One possible method is to dub the audio signal that has been edited to contain the content of the dubbing within a predetermined time, but even in that case, each time the correspondence between the video signal and the audio signal changes,
This is a very complicated task as it requires pressing the track advance key on the dubbing machine and operating the dubbing source equipment.

Therefore, an object of the present invention is to provide a recording apparatus that can more easily perform post-recording recording as described above.

[Means for Solving the Problems] A recording device according to the present invention is a recording system that can freely record still images and audio, and can arbitrarily associate audio recording and image recording. A signal detection means is provided, and when the screen feed signal is detected,
The recording head is moved to the next recording position and the audio is recorded.

[Operation] The above means makes it possible to automatically switch to a screen corresponding to the audio signal during post-recording of the audio signal. This greatly reduces the workload of audio dubbing.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a block diagram of a recording system according to an embodiment of the present invention. In FIG. 1, when recording a video signal, the system control circuit 40 switches the switch 20 to the a contact side, and in response to the operation of the video signal recording switch in the switch group 44, the head drive circuit 30 designates the magnetic disk 32. The magnetic head 31 is moved to the track position. When the movement of the magnetic head 31 is completed, the system control circuit 40
Gates a video signal that has been subjected to known video recording processing in the video recording circuit 10 for a certain period of time so that it is recorded on a magnetic disk 32 by a magnetic head 31 via a pre-emphasis circuit 12, a switch 20, and an FM modulation circuit 22. Instruct and record the matters.

When recording an audio signal, the input audio signal is free from noise and noise.
The signal is subjected to noise reduction processing by a reduction encoder 13, and digitized by an A/D converter 14 under a sampling pulse from an oscillator 38. When the system control circuit 40 receives an instruction to start audio recording from the switch group 44, it instructs the address counter 24 to perform A/D conversion at a rate according to the audio signal time axis compression rate selected by the switch group 44. The output data of the device 14 is written into the audio memory 15. If the amount of audio signals stored in the audio memory 15 exceeds the recording amount of one track of the magnetic disk 32, or if the still video for the audio signal being recorded is switched, or if the screen feed signal input terminal is synchronized with the input audio signal. When a request to move to another track or a request to temporarily stop the recording operation is made as a result of the screen feed signal detection circuit 48 detecting a screen feed signal input from the magnetic disk 32, the system control circuit 40 After moving the magnetic head 31 to a track on which the above signal is not recorded (hereinafter referred to as an empty track), the address signal is read from the audio memory 15 in accordance with the oscillation pulse of the oscillator 39.
The stored data is read out according to the address signal output by the counter 26 and converted into an analog signal by the D/A converter 16. Note that the D/A converter 16 performs D/Δ conversion according to the oscillation pulse of the oscillator 39. Adder 17 adds a control code generated by control code generation circuit 28 and a flag signal generated by flag generation circuit 29 to the time-base compressed audio signal from D/A converter 16. The output of the adder 17 is applied to the magnetic head 31 via the pre-emphasis circuit 18, the switch 20 and the FM modulation circuit 22, and is recorded on the magnetic disk 32.

The audio signal is stored in the audio memory 15, and the audio signal is stored on the magnetic disk 32.
The recording operation continues until a voice recording stop request is issued or there are no recordable free tracks on the magnetic disk 32.

Next, the features of the present invention will be explained in detail with reference to FIG. When the magnetic disk 32 is loaded, the magnetic disk 32
From the recording information of each track, create a data table (hereinafter referred to as the track information table) indicating the recording l/rack number of still images, the playback order of audio tracks (tracks in which audio is recorded), etc. From then on, until the magnetic disk 32 is replaced, the recording and reproduction of images and audio and their order are controlled based on this track information table. The recording/reproducing mode switch in the switch group 44 executes a reproduction routine (not shown) in the reproduction mode, and executes the illustrated recording routine in the recording mode (S2). In other words, start audio recording.
After waiting for the switch to be operated (S3), audio recording is started.

When audio recording starts, audio memory 15 begins storing audio input. 1 of the magnetic disk 32 according to the time axis compression ratio of the audio signal currently recorded in the audio memory 15.
When audio signals equivalent to tracks are accumulated (S8)
, the audio signal equivalent to one track of the audio memory 15 is recorded in an empty track of the magnetic disk 32 without interrupting the storage in the audio memory 15 (S9). At this time, a flag indicating to continue to the next audio track and a control
Add the code and record.

Also, if a screen feed signal synchronized with the audio signal is input during recording, whether the screen feed signal detection circuit detects it (S6
), or when the corresponding image is switched by the track movement switch in the switch group 44 (SIO), at that point the audio signal in the audio memory 15 is recorded with the track continuation flag and control code added ( S7
). Immediately, the magnetic head 31 is moved to the next image track (S7). During this time, the storage in the audio memory 15 is not interrupted, and when audio signals equivalent to one track have been stored, a flag and a control code indicating continuation to the next audio track are added, and the data is stored on the magnetic disk 32. (S9).

Furthermore, when the recording pause switch of the recording switch group 44 is pressed (S5), a flag and a control code are added to the audio signal stored in the audio memory 15 at that time to indicate that it will be continued next time. The data is recorded on the magnetic disk 32 (512) and enters a pause state. Also, when the stop switch of the recording switch group 44 is pressed (S4)
At the time of playback, a flag and a control code are added to end the playback after playing back the sound recorded on that track, and the sound signal stored in the sound memory 15 is recorded on the magnetic disk 32 (5ll), and enters a pause state. . In this state, when the track movement switch in the switch group 44 is pressed (31, 3), the magnetic head 3 moves to the next image track.
1 is moved (S14). In this state, when the stop switch is pressed (S15), the audio recording mode is canceled and the standby state after loading the magnetic disk (S2, 3)
Return to When audio recording is started again in the paused state (Sl6), the state returns to the aforementioned audio recording state.

The means for detecting the screen feed signal synchronized with the audio signal may be incorporated into the still video recording/playing device, or it may be built into a device separate from the still video recording/playing device and the means for detecting the screen feed signal synchronized with the audio signal may be incorporated into a device separate from the still video recording/playing device and communicated with the still video recording/playing device. Track feeding of the magnetic head may be controlled.

[Effects of the Invention] As can be easily understood from the above explanation, according to the present invention, when dubbing an audio signal, it is possible to automatically switch the image corresponding to the audio signal, thereby reducing the complexity of the dubbing operation. This can greatly reduce the chances of dubbing failures.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a recording system according to an embodiment of the present invention.
FIG. 2 shows the operation flowchart. 15: Audio memory 31: Magnetic head 32: Magnetic disk 40 System control circuit 48: Screen feed signal detection circuit

Claims (1)

[Claims] In a recording system that can freely record still images and audio and can arbitrarily associate audio recording and image recording, a detection means for a screen feed signal synchronized with an audio signal is provided, and when the screen feed signal is detected, A recording device characterized by moving a recording head to the next recording position and recording audio.