JP2000285549A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain simultaneous recording and simultaneous reproduction which are free of a lag by allowing respective video and audio recording and reproducing mechanisms to start or stop recording operations or reproducing operations at the same time at the same time when an instruction is given from an instructing means. SOLUTION: When a 'simultaneous recording' switch is selected on a console panel 30, an operation control microcomputer 28 recognizes that and writes the choice of 'simultaneous recording' operation to a dual-port RAM part 26. A video and audio signal 58 is inputted to a VCR a22 and the signal when an analog signal is converted by an analog-digital conversion part 36 into a digital signal, which becomes a frame-by-frame image signal. The image signal and a time code signal are synchronized and put together by a signal composition and magnetization part 44. As the image signal written to a system control microcomputer 34 of a VCR b24, a signal composition and magnetization part 46 of the VCR b24 uses the time code signal generated by a time code generation part 40 of the VCR a22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video / audio recording / reproducing apparatus having a plurality of video / audio recording / reproducing mechanisms.

[0002]

2. Description of the Related Art In a video / audio recording / reproducing apparatus having a plurality of video / audio recording / reproducing mechanisms, a common time axis information, that is, a common time code is added to each of two or more video / audio recording / reproducing mechanisms. When a recording operation (simultaneous recording operation) is to be performed by giving audio input data, for example,
A method of simultaneously pressing the recording start buttons of the respective recording / reproducing mechanisms is used. But,
It is impossible for a human to actually perform an operation with strict timing, and even if there is an intention to attach a common time code, the intention cannot be realized. Also, a plurality of video / audio data with a common time code is to be reproduced (simultaneous reproduction) in synchronization with the time code by a plurality of video / audio recording / reproducing mechanisms provided in the video / audio recording / reproducing apparatus. If
For example, as in the case of the recording operation, a method of simultaneously pressing the reproduction start buttons of the respective recording / reproducing mechanisms is used. However, even in this case, it is impossible for a human to perform an operation with strict timing.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a video / audio recording / reproducing apparatus having a plurality of recording / reproducing mechanisms for simultaneous recording and reproducing without deviation.

[0004]

SUMMARY OF THE INVENTION A video / audio recording / reproducing apparatus according to the present invention has been made in order to solve such a problem. An input section to which video / audio data is input and a recording section for recording the input data are provided. And a playback unit for playing back the video and audio data recorded on the recording medium.A plurality of video and audio recording and playback mechanisms are provided. The recording operation or the reproducing operation is started or stopped at the same time.

Further, when there is one input video / audio data, each video / audio recording / reproducing mechanism generates and records a series of the same frame data, and the same individual frame data has the same time code. Is added.

[0006]

By using the video / audio recording / reproducing apparatus according to the present invention, each of the plurality of video / audio recording / reproducing mechanisms can simultaneously start a recording operation and a reproducing operation, and simultaneously stop them. . When only one video / audio data is input, each video / audio recording / reproducing mechanism generates and records data having the same series of frames, and furthermore, the same time code is assigned to the same individual frame. Recordings that can be added can be made.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below with reference to the accompanying drawings. FIG.
FIG. 1 is a schematic block diagram of one embodiment of a video / audio recording / playback apparatus according to the present invention. The device has a recording and reproducing mechanism
(VTRa2, VTRb4). There are also two means (VTRa control means 6 and VTRb control means 8) for controlling the mechanism corresponding to them. Further, a switch input key matrix 12 for selecting what operation is to be performed by the video / audio recording / reproducing apparatus is provided. Further, in response to an instruction (input) from the switch input key matrix 12, which recording / reproducing mechanism is operated. And what action should be taken to determine
A switch input key matrix processing means 10 for giving an instruction to the mechanism control means (VTRa control means 6, VTRb control means 8) is provided.

The switch input key matrix 12 first includes "record", "reproduce", "stop", "fast forward", "rewind", and the like provided in a general video / audio recording / reproducing apparatus. The selection of which recording / reproducing mechanism, such as “record”, “reproduce”, “stop”, “fast forward”, “rewind”, etc., is performed by a “VTRa or VTRb” switch. Therefore, for example, the recording / reproducing mechanism VT
If the playback operation is performed in Rb4, "VTRa
With the “or VTRb” switch, it is selected that the operation is the VTRb operation, and then the “reproduction” operation is selected.

On the other hand, in the present embodiment, "simultaneous recording" and "simultaneous reproduction" are stored in the switch input key matrix 12.
"Simultaneous stop" is provided.

Here, "simultaneous recording" means two (or more)
Video and audio input data to each of the video and audio recording and playback mechanisms, and attach a common time code while synchronizing (synchronizing) each of the video and audio data with a recording and playback operation to both recording and playback mechanisms. It is to let. "Simultaneous playback" refers to two (or more) video / audio recording / reproducing mechanisms, in which two (or more) video / audio recording data having a series of common time codes are synchronized with a common time code and played. It is to do.

When "simultaneous recording", "simultaneous reproduction", and "simultaneous stop" switches are input to the switch input key matrix 12, the switch input key matrix processing means 10, the VTRa control means 6 and the VTRb control means 8 At the same time, the control signal 14 and the control signal 16 are output. In addition, the control signal 14 and the control signal 16 include information that "simultaneous operation" (that is, any one of "simultaneous recording", "simultaneous reproduction", and "simultaneous stop") has been selected. Therefore, the recording / reproducing mechanism VTRa2 and the recording / reproducing mechanism VTRb4 can perform the respective operations of “simultaneous recording”, “simultaneous reproduction”, and “simultaneous stop”.

FIG. 2 is a block diagram showing in more detail functions and parts for performing “simultaneous recording” when only one video and audio data is input in the embodiment of FIG. Two video / audio recording / playback mechanisms (VTRa, VT
Rb), one video / audio signal is input, and as a result, two video / audio recording / reproducing mechanisms (VTRa, VTRb)
The process of adding the same time code to the same video and audio data and recording the same on each recording medium will be described with reference to the block diagram of FIG.

The block diagram of FIG.
0, a VTRa unit 22, a VTRb unit 24, and a dual port RAM (Random Access Memory)
y) It comprises a part 26. The operation control block 20 including the operation panel 30 and the operation control microcomputer 28 corresponds to the switch input key matrix 12 and the switch input key matrix processing means 10 in FIG. VTRa
Unit 22, the system control microcomputer 32 of the VTRb unit 24,
Reference numeral 34 denotes the VTRa control means 6 in FIG.
It corresponds to TRb control means 8. VTRa section 22, VTR
b section 24 includes system control microcomputers 32, 3
4, analog / digital conversion units 36 and 38, time code generation units 40 and 42, signal synthesis / magnetization units 44 and 46 (and recording heads 48 and 50). Especially VTRb section 2
4 includes a time code delay control unit 56.

First, "simultaneous recording" is performed on the operation panel 30.
When the switch is selected, the operation control microcomputer 28 recognizes the fact and writes the fact that the “simultaneous recording” operation is selected in the dual port RAM unit 26. The system control microcomputer 32 of the VTRa section 22 and the system control microcomputer 34 of the VTRb section 24 simultaneously read the signals.

The video / audio signal 58 is input to the VTRa section 22. If the signal is an analog signal, the analog /
The digital signal is converted into a digital signal by the digital conversion unit 36, and becomes an image signal in frame units. The VTRa unit 22 includes a time code generator (Time Code Generator,
TCG) 40, and a time code signal is generated.

The image signal and the time code signal are first synchronized (tuned) and synthesized in the signal synthesizing / magnetizing section 44. At this time, tuning and synthesis are performed based on a reference signal 60 input from the outside. As a result, a one-to-one correspondence is formed between the image signal and the time code. Further, the image time code composite signal is magnetized and recorded on the recording medium 52 (in this embodiment, a magnetic tape) via the recording head 48. Signal synthesis / magnetization unit 4
The operation control of the image signal and the time code signal in 4 is performed by the system control microcomputer 32.

The image signal converted into a digital signal by the analog / digital converter 36 is written into the dual port RAM 26 by the system control microcomputer 32 of the VTRa 22 for recording by the VTRb 24. The written image signal is read by the system control microcomputer 34 of the VTRb 24.

The system control microcomputer 34 of the VTRb 24
The image signal read by the VTRb 24 is
The magnetizing section 46 first tunes and combines with the time code signal. In the “simultaneous recording” operation, VTRb2
4 in the signal synthesis / magnetization section 46 (VTRb24
The time code signal generated by the time code generation unit 40 of the VTRa 22 is used instead of the time code signal generated by the time code generation unit 42 of FIG. For the same video / audio input signal, two video / audio recording / playback mechanisms (VTR
a, VTRb) performs "simultaneous recording" because the same time code must be added to two identical video / audio frame data and recorded on the VTRa and VTRb.

However, by the time the system control microcomputer 32 of the VTRa 22 writes the image signal to the dual port RAM unit 26, and further, the system control microcomputer 34 of the VTRb 24 reads the written image signal.
A certain time is required. Therefore, the image signal read by the system control microcomputer 34 of the VTRb 24 is
Since the image signal used in Ra22 is temporally shifted, if the time code of VTRa22 is added as it is, the operation purpose of "simultaneous recording" cannot be achieved.

Therefore, the VTRb section 24 is provided with a time code delay control section 56. First, the time code delay control unit 56 receives the time code signal of the VTRa unit 22. Here, the time code delay control unit 56 receives from the system control microcomputer 34 of the VTRb 24 the information on the state of the deviation between the image signals of the VTRa 22 and the VTRb 24, and performs an adjustment operation (subtraction or addition) of the time code signal. The adjusted time code signal is
Via the time code generation unit 42 of the VTRb 24, V
The signal is sent to the signal synthesis / magnetization section 46 of TRb24. In addition,
In the case of such a “simultaneous recording” operation, the time code generation unit 42 of the VTRb 24 sends out the time code signal adjusted by the time code delay control unit 56 without any conversion while receiving it. That is, the function of generating the time code by itself is not substantially performed. It is the system control microcomputer 34 of the VTRb 24 that recognizes that the "simultaneous recording" operation is being performed so as to control the adjusted time code signal to "pass through".

The image signal whose time is shifted from the image signal of the VTRa 22 and the adjusted time code signal are the same as those of the VT a 22 (of the VTR b 24).
Synchronized (tuned) and synthesized by the signal synthesis / magnetization unit 46. Synchronization and synthesis are performed based on the external reference signal 60 in the same manner. Then, the image time code composite signal is magnetized and recorded on the recording medium 54 (in this embodiment, a magnetic tape). Signal synthesis / magnetization unit 46
The operation control of the image signal and the time code signal in
This is performed by the system control microcomputer 34 of the VTRb 24 as in the case of the VTRa 22.

In the above description, the case where "simultaneous recording" is selected on the operation panel 30 has been mainly described. For example, even if “simultaneous playback” is selected on the operation panel 30, the VTR
Under the control of the system control microcomputers 32 and 34 provided in the a22 and the VTRb 24, simultaneous playback operations can be performed in synchronization with a common time code.

In the above embodiment, a magnetic tape is used as a recording medium, but the recording medium is not limited to this. For example, hard disk or IC
A memory or the like may be used.

In the above embodiment, two video / audio recording / reproducing mechanisms are provided. However, even if two or more video / audio recording / reproducing mechanisms are provided, if the present invention is used, “simultaneous recording”, “ Simultaneous playback and simultaneous stop can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a preferred embodiment of a video / audio recording / playback apparatus according to the present invention.

FIG. 2 is a block diagram showing functions and parts for performing “simultaneous recording” in a case where only one piece of video and audio data is input in the embodiment of FIG. 1;

[Explanation of symbols]

 2 ... Recording / reproducing mechanism a 4 ... Recording / reproducing mechanism b 6 ... VTRa control means 8 ... VTRb control means 12 ... Switch input key matrix 22 ... VTRa 24 ... VTRb 26 ··· Dual port RAM 32 ··· System control microcomputer (VTRa) 34 ··· System control microcomputer (VTRb) 40 ··· Time code generator (VTRa) 42 ··· Time code generator (VTRb) 44 ··· Signal synthesis / magnetization unit (VTRa) 46: signal synthesis / magnetization unit (VTRb) 56: time code delay control unit

Claims (3)

[Claims] 1. A video / audio recording / playback mechanism comprising a plurality of input / output units to which video / audio data is input, a recording unit for recording the input data, and a video recorded on a recording medium. A video / audio recording / reproducing apparatus including a reproducing unit for reproducing audio data, wherein when an instruction is given from an instruction unit, each video / audio recording / reproducing mechanism starts or stops recording or reproducing operation at the same time. A video / audio recording / reproducing apparatus characterized by the following. 2. The video / audio recording / reproducing apparatus according to claim 1, wherein when the input video / audio data is one, each video / audio recording / reproducing mechanism generates and records a series of same frame data. A video / audio recording / reproducing apparatus characterized in that the same time code is added to the same individual frame data. 3. A video / audio recording / reproducing device provided with a plurality of video / audio recording mechanisms inputs one video / audio data, and when each video / audio recording mechanism records, a series of the same frame data is recorded. A video / audio recording method in which the same time code is added to the same individual frame data.