JPH06217261A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the cost of the recording and reproducing device which records and reproduces two programs in the same time zone by using a memory in common for both the recording and reproduction and to eliminate a break of a sound by assigning the sounds of the respective programs to the respective channels of a stereophonic sound for recording when programs are recorded and reproduced. CONSTITUTION:The recording is carried by performing vertical synchronization between the two programs recorded by a signal processing part 5 by using the memory and images are alternated by a video recording switch 7 to put the images together. For the reproduction, the signal processing part 5 interpolates data which become absent at the time of the recording by using the memory. A video switch 3 and a recording/reproduction switch 4 are used to use the memory in common for both the recording and reproduction, thereby reducing the cost. Further, when the sound are switched similarly to images and put together, the sounds are intermitted, so the images and sounds are processed individually and the respective program sounds are assigned to the respective channels of the stereophonic sound and recorded to improve the performance of the sounds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus capable of simultaneously recording two different programs and reproducing any one of the programs.

[0002]

2. Description of the Related Art In recent years, BS broadcasting and CS broadcasting have spread remarkably, and it is considered that the number of broadcast programs will increase and the number of channels will increase. However, in the conventional home-use VTR, in the era of multi-channel, even if there are two programs to be recorded at the same time, only one program can be recorded.

As a technique for recording a plurality of programs at the same time, there is already Japanese Patent Application Laid-Open No. 4-35477, 5477. The invention described in JP-A-4-35477 will be described below with reference to the drawings.

FIG. 5 (a) is a block diagram for explaining Japanese Patent Laid-Open No. 4-35477, which is for recording / reproducing three different video / audio signals.

In FIG. 5A, 14A, 14B and 14C are
Three different video / audio signals A, B, C input terminals,
The 15A, 15B, and 15C time-divide the video / audio signals A, B, and C into one field, A1, B1, and C1, respectively.
An input signal processing unit for generating first control signals α1, β1, γ1 when time division is performed, and 16 is a first control signal α1, β1,
The second control signal α for inputting γ1 and determining the order of the divided 1-field video / audio signals A1, B1, C1 and the divided 1-field video / audio signals A1, B1
A recording synchronization signal processing unit for generating a third control signal β for identifying C1, and 17 for inputting a second control signal α,
A recording signal processing unit for sequentially sending the video / audio signals A1, B1, C1 of the field, and 18 for the video / audio signals A1, B1, C1 and the third control signal β of one field.
A recording section 21 for recording on a magnetic tape in the format shown in FIG. 9B, 21 is a video / audio signal A1 of one field reproduced by the recording section 18 in synchronization with a control signal β reproduced by the third recording section 18.・ Fourth to judge B1 and C1
A reproduction synchronization signal processing unit for generating the control signal Δ of
A reproduction signal processing unit for separating the video / audio signals A1, B1, C1 of one field reproduced from the recording unit 18 by the control signal Δ of each of the channels, 20A, 20B, 20C are separated for each channel. An output signal processing unit that connects the field video / audio signals A1, B1, and C1 in the order in which they are sent, 22 is a switch for selecting the video / audio signals to be output, and 23 is a video / audio signal output terminal. The operation of the system of Japanese Patent Laid-Open No. 4-35477 constructed as described above will be described below.

First, the case of recording three different video / audio signals will be described. Three different input video / audio signals A, B, C are input signal processing units 15A, 15B,
At the same time, the first control signals α1, β1, and γ1 for distinguishing the time-divided video / audio signals A1, B1, and C1 are generated at the same time.

Next, the time-division video / audio signal A1
Input B1 and C1 to the recording signal processing unit 17. In addition, the first control signals α1, β1, and γ1 are transferred to the recording synchronization signal processing unit 16
To enter. Next, the recording synchronization signal processing unit 16 inputs the second control signal α for sequentially ordering the video / audio signals A1, B1, C1 of one field to the recording signal processing unit 17. Further, the recording synchronization signal processing section 16 identifies the video / audio signals A1, B1, C1 of one field and generates the third control signal β for designating the track area of the magnetic tape.

Next, the recording signal processing unit 17 uses the second control signal α to generate one-field video / audio signals A1, B1 ,.
C1 is sent to the recording unit 18 in a predetermined order. In the recording section 18, as shown in FIG. 5B, the track area 26A of the magnetic tape 24 is shown.
-Recorded in the order sent to 26B and 26C. The third control signal β is recorded in the control unit 25 because it is necessary for reproduction.

Next, the case of reproducing will be described. The video / audio signals A1, B1, and C1 of one field are sent from the recording unit 18 to the reproduction signal processing unit 19 in a predetermined order. At the same time, the third control signal β is reproduced and input to the reproduction signal processing section 19. Next, the reproduction signal processing unit 19 generates the fourth control signal Δ for discriminating the one-field video / audio signals A1, B1, and C1 to be read in synchronization with the third control signal β. In addition, the reproduced signal processing unit 19 uses the fourth control signal Δ to reproduce the reproduced video / audio signal A of one field.
1-B1-C1 are separated into respective channels and sent to the output signal processing units 20A, 20B and 20C. The switch 22 selects and outputs the video / audio signal to be output. As described above, the video / audio signal of the desired channel can be obtained.

[0010]

However, in the above-mentioned configuration, the problem that the circuit scale becomes large and the cost becomes high, and the quality deterioration occurs when the one program recorded is reproduced by the plural program reproducing system. I had a problem to say. Furthermore, in the above configuration, the audio is thinned out together with the video, so that there is a problem that the audio skips when reproducing the audio.

In view of the above problems, the present invention achieves cost reduction by sharing a circuit in recording / reproducing processing to reduce the circuit scale and automatically detecting recording of one program and recording of a plurality of programs at the time of reproduction. Eliminates the deterioration of image quality when recording one program. Further, when recording audio, the audio of each program is assigned to each channel of stereo audio and recorded, thereby providing a recording / reproducing apparatus which eliminates the problem of audio skipping during reproduction.

[0012]

In order to solve the above problems, a recording / reproducing apparatus of the present invention is, as a first invention, a plurality of video signal input terminals, a plurality of video signal input terminals, and a recording section described below. It is connected to the output terminal and the control pulse generator below, and selects one video signal from multiple input video signals during recording based on the video selection pulse from the control pulse generator, and outputs from the recording unit below during playback. A video switch for selecting and outputting a signal, an output terminal of the video switch, a video signal input terminal of one of the plurality of video signal input terminals, and a control pulse generation unit described below are connected to the control pulse generation unit. Select the input signal from the above video signal input terminal at the time of recording by the recording / playback switching control pulse 1 of
At the time of reproduction, it is connected to the first recording / reproducing switch that selects the output signal of the video switch, the output terminal of the first recording / reproducing switch, and the control pulse generating unit described below. Based on the recording / playback common circuit, a signal processing unit for synchronizing two programs to record two programs at the time of video recording, and a video signal processing for playing one of the two programs recorded at the time of playback, and a playback mode input terminal And a control pulse generator connected to the output terminal of the video switch and the reproduction mode input terminal to generate the control pulse of the recording / reproducing apparatus of the present invention, the output terminal of the video switch, the output terminal of the signal processing unit, and the control pulse. It is connected to the generator and selects the output signal from the video switch when recording one program based on the recording mode control pulse from the control pulse generator when recording. A recording switch that selects the output signal of the signal processing unit during recording, a recording unit that is connected to the output terminal of the recording switch to record the video signal, an output terminal of the video switch, an output terminal of the signal processing unit, and the control pulse generation described above. The output signal from the video switch is selected at the time of recording based on the recording / reproduction switching control pulse 2 from the control pulse generation unit, and the output signal from the signal processing unit is selected at the time of recording two programs during playback. A second recording / reproducing switch that selects the output signal from the video switch in the case of recording one program and a video signal output that is connected to the output terminal of the second recording / reproducing switch and outputs a video signal for display. And a terminal.

In addition to the above-mentioned first invention, the second invention provides a plurality of video signal input terminals, a plurality of video signal input terminals, an output terminal of the recording section described below, and a control pulse generation section described below. A video switch that is connected and that selects one video signal from multiple input video signals during recording based on the video selection pulse from the control pulse generation unit, and selects and outputs the output signal from the following recording unit during playback. The recording / reproducing switching control pulse 1 from the control pulse generator is connected to the output terminal of the switch and one video signal input terminal of the plurality of video signal input terminals and the control pulse generator described below.
The first recording / playback switch that selects the input signal from the above video signal input terminal during recording and the output signal of the video switch during playback, the output terminal of the first recording / playback switch, and the following control pulse The recording / playback shared circuit is connected to the generation unit and based on the signal processing control pulse from the control pulse generation unit, the two programs are synchronized for each field in order to record two programs at the time of recording, and at the time of reproduction,
A video signal processing unit that reproduces one of the recorded programs and a video switch output terminal are connected, and the field polarity of the output signal from the video switch is detected (odd / even field detection). A playback mode determination unit that automatically determines whether the output signal from the switch is recorded as two programs or one program.
A control pulse generator connected to the output terminal of the video switch and the output terminal of the reproduction mode determination unit to generate the control pulse of the recording / reproducing apparatus of the present invention, and the output terminal of the video switch and the output terminal of the signal processing unit. Recording that is connected to the pulse generator and selects the output signal from the video switch when recording one program and selects the output signal of the signal processor when recording two programs based on the recording mode control pulse from the control pulse generator when recording A switch, a recording unit connected to the output terminal of the recording switch for recording a video signal, an output terminal of the video switch, an output terminal of the signal processing unit, and a control signal generation unit, and an output signal from the control signal generation unit. The output signal from the video switch is selected at the time of recording based on the recording / reproduction switching control pulse 2 which is A second recording / reproducing switch that selects an output signal and selects an output signal from the video switch when recording one program, and outputs a video signal for display that is connected to the output terminal of the second recording / reproducing switch And a video signal output terminal.

According to a third aspect of the present invention, a first right audio input terminal and a left audio input terminal for inputting a first stereo sound, a second right audio input terminal for inputting a second stereo sound, and
It is connected to the first right audio input terminal and the second right audio input terminal, outputs the input signal from the second right audio input terminal when recording two programs, and outputs the input signal from the first right audio input terminal when recording one program. A recording switch for outputting an input signal, a recording section connected to the output terminal of the recording switch and the first left audio input terminal for recording stereo sound, and connected to the right audio output terminal and the left audio output terminal of the recording section. An audio switch that outputs an output signal from the left audio output terminal of the recording unit when recording one program, and an output signal from the right audio output terminal of the recording unit when recording two programs, and a first left audio input terminal A left audio output switch that is connected to the output terminal of the audio switch, outputs the input signal from the first left audio input terminal during recording, and outputs the output signal from the audio switch during playback, and the first right audio input terminal When Is connected to the right audio output terminals of the recording unit,
It was connected to the right audio output switch that outputs the input signal from the first right audio input terminal during recording, and the output signal from the right audio output terminal of the recording unit during playback, and the output terminals of the left audio output switch. The left audio output terminal and the right audio output terminal connected to the output terminal of the right audio output switch are provided.

Further, in contrast to the above-mentioned third invention, the fourth invention is such that a first right audio input terminal and a left audio input terminal for inputting a first stereo sound and a second stereo sound for inputting a second stereo sound. 2 are connected to the right audio input terminal and the left audio input terminal, and the first right audio input terminal and the second right audio input terminal.
When recording a program, the input signal from the first right audio input terminal and the input signal from the second right audio input terminal are time-compressed, multiplexed and output, and input from the first right audio input terminal when recording one program. The first audio multiplexing unit that outputs a signal, and the first left audio input terminal and the second left audio input terminal are connected to each other.
When recording a program, the input signal from the first left audio input terminal and the input signal from the second left audio input terminal are time-compressed, multiplexed and output, and input from the first left audio input terminal when recording one program. A second audio multiplexing unit that outputs a signal, a recording unit that is connected to an output terminal of the first audio multiplexing unit and an output terminal of the second audio multiplexing unit, and that records stereo audio, and a left audio output of the recording unit Connected to the terminal, the output signal from the left audio output terminal of the recording unit is output when recording one program, and the time compression multiplexed output signal from the left audio output terminal of the recording unit is decomposed and time expanded when recording two programs. Connected to the right audio output terminal of the recording section and the first audio decomposing section for outputting as an output signal to output an output signal from the right audio output terminal of the recording section when recording one program,
When recording two programs, a second audio decomposing unit for decomposing the time-compressed and multiplexed output signal from the right audio output terminal of the recording unit, expanding the time, and outputting the signal, a first left audio input terminal, and a first audio decomposition Connected to the two output terminals, outputs the input signal from the first left audio input terminal during recording, and outputs one of the two output signals from the audio decomposing section during playback (audio corresponding to the playback video). A left audio output switch for outputting
Is connected to the right audio input terminal and the two output terminals of the second audio decomposing unit, outputs the input signal from the first right audio input terminal during recording, and outputs the two output signals from the audio decomposing unit during playback. Right audio output switch that outputs one of the two (audio that corresponds to the playback video), the left audio output terminal that is connected to the output terminal of the left audio output switch, and the right audio that is connected to the output terminal of the right audio output switch And an output terminal.

[0016]

According to the present invention, the circuit can be shared in the recording / reproducing process, the circuit scale can be reduced, and the cost can be reduced. Further, at the time of reproduction, it is possible to automatically detect the recording of one program and the recording of a plurality of programs by the recording signal, and to eliminate the image quality deterioration that occurs when the recording of one program is reproduced in the plural program recording mode.

Furthermore, by assigning the sound of each program to each channel of the stereo sound at the time of sound recording and recording the sound, the problem that the sound is skipped at the time of sound reproduction can be eliminated.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording / reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. Figure 1
2 is a block diagram of a recording / reproducing apparatus in an embodiment of the invention of FIG.

In FIG. 1, 1.2 is a video signal input terminal, 3 is a video switch, 4 is a recording / reproducing switch, 5 is a signal processing section, 6 is a control pulse generating section, 7 is a recording switch,
Reference numeral 8 is a recording unit, 12 is a reproduction mode input terminal, and 10 is a video signal output terminal.

The operation of the recording / reproducing apparatus configured as described above will be described below. Video signal input terminals 1 and 2
In the case of recording two video signals A and B that are input from the control pulse generation unit 6, the video switch 3 first selects the video signal A by the video selection pulse from the control pulse generation unit 6, and the recording / reproduction switch 4 selects the control pulse generation unit. The video signal B is selected by the recording / reproduction control signal control pulse from 6. Next, the signal processing unit 5
Then, the video signal B is input, and the video signal A is field- or frame-synchronized with the signal processing control pulse from the control pulse generator 6 and output. Here, field or frame synchronization is performed using a field memory or frame memory.

The video signal A and the video signal B synchronized with the video signal A are input to the recording switch 7, and are combined by the recording mode control pulse from the control pulse generation unit 6 and output to the recording unit 8. FIG. 7A shows an explanatory diagram of the above recording. The output of the recording switch 7 of FIG. 7A is recorded by the recording unit 8. The recording / reproducing switch 9 uses the recording / reproducing control signal control pulse from the control pulse generating unit 6 to generate the video signal A.
Is selected, the video signal A is output from the video signal output terminal 10 during recording, and the program of the video signal A can be viewed on the display device. Further, when recording one program, it can be dealt with by outputting only the video signal A from the recording switch 7 by the recording mode control pulse from the control pulse generation unit 6.

Next, at the time of reproduction, the video switch 3 selects the output signal of the recording section 8 by the video selection pulse from the control pulse generation section 6, and the recording / reproduction switch 4 controls the recording / reproduction control signal from the control pulse generation section 6. The output signal of the recording unit 8 is selected by the pulse. Next, in the signal processing unit 5, the recording unit 8
Of the video signals A and B are reproduced by the signal processing control pulse from the control pulse generator 6. FIG. 7B shows an explanatory diagram of the above reproduction. In the present invention, one of the images A and B is reproduced using the field memory or frame memory used for recording. FIG. 7B shows an example in which the data of the missing field or frame is replaced with the data of the previous field or frame for simplification, but the image quality can be improved by performing the field or frame interpolation.

Further, the control pulse generator 6 generates the recording / reproduction switching control pulse 2 based on the reproduction mode signal input from the reproduction mode input terminal 12. The recording / reproducing switch 9 can distinguish the two programs recorded and the one program recording by the recording / reproducing switching control pulse 2 from the control pulse generator 6 and output them to the video signal output terminal 10. Here, what is recorded as two programs and what is recorded as one program are distinguished from each other because when the one program recorded at the time of reproduction is reproduced like the one recorded as the two programs, the image quality is deteriorated. This is because.

(Embodiment 2) Further, FIG. 2 relates to a second embodiment of the present invention, in which a video selection pulse and a recording mode signal are input from the outside in the first embodiment. By inputting the recording / reproducing mode signal of the recording / reproducing apparatus from the outside, the degree of freedom of recording / reproducing of the recording / reproducing apparatus is increased.

(Embodiment 3) FIG. 3 shows a second embodiment of the present invention.
3 is a block diagram of an embodiment of the recording / reproducing apparatus of the invention of FIG.

In FIG. 3, 1.2 is a video signal input terminal, 3 is a video switch, 4 is a recording / reproducing switch, 5 is a signal processing unit, 6 is a control pulse generating unit, 7 is a recording switch,
Reference numeral 8 is a recording unit, 13 is a reproduction mode determination unit, and 10 is a video signal output terminal.

The operation of the recording / reproducing apparatus configured as described above will be described below. Video signal input terminals 1 and 2
In the case of recording two video signals A and B that are input from the control pulse generation unit 6, the video switch 3 first selects the video signal A by the video selection pulse from the control pulse generation unit 6, and the recording / reproduction switch 4 selects the control pulse generation unit. The video signal B is selected by the recording / reproduction control signal control pulse from 6. Next, the signal processing unit 5
Then, the video signal B is input, field-synchronized with the video signal A by the signal processing control pulse from the control pulse generator 6, and output. Here, the field synchronization is performed using the field memory. Recording switch 7
Then, the video signal A and the video signal B synchronized with the video signal A are input, combined by the recording mode control pulse from the control pulse generation unit 6, and output to the recording unit 8. Figure 9
An explanatory diagram of the above recording is shown in (a). The output signal of the recording switch 7 in FIG. 9A is recorded by the recording unit 8. The output signal of the recording switch 7 recorded here is only odd fields (or even fields).

In the recording / reproducing switch 9, the video signal A is selected by the recording / reproducing control signal control pulse from the control pulse generating section 6, and the video signal A is selected at the time of recording.
Then, the program of the video signal A can be viewed on the display device. Further, when recording one program, it can be dealt with by outputting only the video signal A from the recording switch 7 by the recording mode control pulse from the control pulse generation unit 6.

Next, at the time of reproduction, the video switch 3 selects the output signal of the recording unit 8 by the video selection pulse from the control pulse generation unit 6, and the recording / reproduction switch 4 controls the recording / reproduction control signal from the control pulse generation unit 6. The output signal of the recording unit 8 is selected by the pulse. Next, in the signal processing unit 5, the recording unit 8
Of the video signals A and B are reproduced by the signal processing control pulse from the control pulse generator 6. FIG. 9B shows an explanatory diagram of the above reproduction. In the present invention, the field memory used for recording is used for the video A.
One of B is reproduced. FIG. 9B shows an example in which the data of the missing field is replaced with the data of the previous field for simplification, but the image quality can be improved by performing the field interpolation.

Further, the reproduction mode judging section 13 judges the odd-even field of the output signal of the video switch 3, and the one-recorded program has the odd-even field judgment of the video signal of odd field / even field / odd field / even field. However, in the case of recording two programs, the odd / even field determination of the video signal is only odd fields (or even fields). This is because when two programs are recorded, only odd fields (only even fields) are recorded as described above. The reproduction mode signal, which has been discriminated between the two-program recording and the one-program recording, is input to the control pulse generating section 6. The control pulse generation unit 6 generates the recording / reproduction switching control pulse 2 based on the reproduction mode signal from the reproduction mode determination unit 13. The recording / reproducing switch 9 can distinguish the two programs recorded and the one program recording by the recording / reproducing switching control pulse 2 from the control pulse generator 6 and output them to the video signal output terminal 10. It should be noted that reproducing the video signal of only one field with the current VTR is the same as reproducing the relative standard signal with the current VTR and is not a problem.

(Embodiment 4) FIG. 4 shows a recording / reproducing apparatus according to another embodiment of the second invention. In contrast to the embodiment 3 shown in FIG. By inputting a recording mode signal from the outside, the degree of freedom of recording / reproducing of the recording / reproducing apparatus is increased.

(Embodiment 5) FIG. 6 shows a third embodiment of the present invention.
3 is a block diagram of an embodiment of the recording / reproducing apparatus of the invention of FIG.

In FIG. 6, 27 is a first right audio input terminal,
28 is the first left audio input terminal, 29 is the second right audio input terminal, 31
Is a recording switch, 32 is a recording section, 34 and 35 are output switches,
36 is a right audio output terminal and 37 is a left audio output terminal.

The operation of the recording / reproducing apparatus configured as described above will be described below. When recording two sounds, first the first right audio input terminal 27
At the same time as inputting the right sound to the right sound input terminal of the recording unit 32, the recording switch 31 selects the second right sound input from the second right sound input terminal 29 and inputs it to the left sound input terminal of the recording unit 32. When recording one voice, first the first right voice input from the first right voice input terminal 27 is recorded in the recording section.
Record switch at the same time as input to 32 right audio input terminals
At 31, the first left audio input from the first left audio input terminal 28 is selected and input to the left audio input terminal of the recording unit 32. Also,
During recording, the sound input from the first right audio input terminal and the sound input from the first left audio input terminal are output switch 34.
The audio input from the first right audio input terminal and the audio input from the first left audio input terminal are selected by the output switches 34 and 35, and are output to the right audio output terminal 36 and the left audio output terminal. It is output from 37.

When reproducing two voices, the recording unit 32
The sound output from the right audio output terminal of and the left audio output terminal of the recording unit 32 is input to the output switches 34 and 35. The output switches 34 and 35 select the audio corresponding to the video to be played and output the right audio output. It is output from the terminal 36 and the left audio output terminal 37. When reproducing one sound, the sound output from the right sound output terminal of the recording unit 32 and the left sound output terminal of the recording unit 32 is input to the output switches 34 and 35, and in the output switches 34 and 35, The audio corresponding to the video to be reproduced is selected and output from the right audio output terminal 36 and the left audio output terminal 37.

(Embodiment 6) FIG. 7 shows a fourth embodiment of the present invention.
3 is a block diagram of an embodiment of the recording / reproducing apparatus of the invention of FIG.

In FIG. 7, 27 is a first right audio input terminal,
28 is the first left audio input terminal, 29 is the second right audio input terminal, 30
Is the second left audio input terminal, 38 and 39 are multiplex units, 32 is a recording unit,
40 and 41 are disassembly parts, 34 and 35 are output switches, 36 is a right audio output terminal, and 37 is a left audio output terminal.

The operation of the recording / reproducing apparatus configured as described above will be described below. When recording two sounds, first the first right audio input terminal 27
The right audio and the first left audio input from the first left audio input terminal 28 are input to the multiplexing unit 38, time-compressed by the multiplexing unit 38, and then input to the right audio input terminal of the recording unit 32 to be input to the recording unit 32. Record. In addition, the second right audio input from the second right audio input terminal 29 and the second left audio input from the second left audio input terminal 30 are input to the multiplexing unit 39, time-compressed by the multiplexing unit 39, and then recorded. Input to the left audio input terminal of section 32 and record in recording section 32. Further, when recording one voice, first, the first right voice input from the first right voice input terminal 27 is input to the right voice input terminal of the recording unit 32 without being multiplexed by the multiplexing unit 38, and at the same time, the first right voice is input. The first left sound input from the left sound input terminal 28 is multiplexed.
Input to the left audio input terminal of the recording unit 32 without multiplexing at 39. Also, during recording, the voice input from the first right voice input terminal and the voice input from the first left voice input terminal are input to the output switches 34 and 35, and at the output switches 34 and 35,
The sound input from the first right sound input terminal and the sound input from the first left sound input terminal are selected and the right sound output terminal 36
Is output from the left audio output terminal 37.

When reproducing two voices, first, the right voice output from the right voice output terminal of the recording unit 32 is decomposed into the decomposition unit 40.
, And the decomposition unit 40 decomposes the time-compressed right sound and inputs the two right sounds to the output switch 34. In addition, the left sound output from the left sound output terminal of the recording unit 32 is decomposed into the decomposition unit 41.
The time-compressed left voice is decomposed by the decomposition unit 41 and the two left voices are input to the output switch 35. The output switches 34 and 35 select the audio corresponding to the video to be reproduced and output the audio from the right audio output terminal 36 and the left audio output terminal 37. When reproducing one voice, since it is recorded without being multiplexed by the multiplexing units 38 and 39 during recording, it is input to the output switches 34 and 35 without being decomposed by the decomposition units 40 and 41 during reproduction. The sound is output from the right audio output terminal 36 and the left audio output terminal 37.

FIG. 8 shows an embodiment of the disassembling / multiplexing unit. Note that FIG. 8 has a configuration in which the disassembling unit and the multiplexing unit are commonly used.

In FIG. 8, 44 is a first disassembled / multiplexed audio input terminal, 45 is a second disassembled / multiplexed audio input terminal, 46 is an AD converter, 48 is a multiplex / disassembled switch, and 49/50/51/52. A memory, 54.55.56 are multiple switches, 53 is a control pulse generator, 57.58 are DA converters, 59 is a first decomposition / multiplex audio output terminal, and 60 is a second decomposition / multiplex audio output terminal. Less than,
The operation of the multiplexing / decomposing unit in FIG. 6 will be described with reference to the operation explanatory diagram of the multiplexing / decomposing unit in FIG.

First, at the time of multiplexing, the first voice AL is input from the first decomposition / multiplex audio input terminal 44 and the second voice BL is input from the second decomposition / multiplex audio input terminal 45, and the AD converters 46 and 47 are input.
AD conversion is performed. The first voice AL is the memory 49/50
Then, the speed is converted as shown in FIG. In addition, the multiple decomposition switch selects the second voice BL, and the second voice BL is stored in the memory.
The speed is converted in the same way as AL at 51 and 52. Voice AL / BL whose speed has been converted is multiplexed by multiple switches 54, 55, 56 and DA
DA conversion is performed by the converter 57, and the first decomposition / multiplex audio output terminal 57
Is output and recorded in the recording unit.

When disassembling, first disassembling / multiple audio input terminal 44
The multiplex-recorded voice is input, and the multiplex-switching switch selects the multiplex-recorded voice input from the first split / multiplex voice input terminal 44. As shown in FIG. 10, multiple recorded voices are converted in speed by memories 49, 50, 51, 51 and voice AL / BL.
Is played. Next, from the multiplex switches 54 and 56, voice AL
The voice BL is selected from the multiplex switch 55, DA-converted by the DA converters 57 and 58, and the first decomposition / multiplexed voice output terminal
59, output from the second disassembly / multiplex audio output terminal 60.

[0044]

As described above, the recording / reproducing apparatus of the present invention performs recording / reproducing separately for video and audio.

The first invention relates to a video recording / reproducing apparatus, and the cost can be reduced by sharing a memory and a circuit used for video recording / reproducing.

In addition to the above-mentioned first invention, the second invention is to detect the field polarity of the recording video signal (detect odd / even fields) to determine whether the recording state is a single image or a plurality of images. Is automatically detected by. As a result, it is possible to automatically switch between the reproduction of a single image recorded and the reproduction of a plurality of recorded images during reproduction, and it is possible to eliminate the deterioration of the reproduction image quality of a single image recorded.

The third aspect of the present invention relates to an audio recording / reproducing apparatus. In the conventional method of recording two programs in the same time zone, the video and audio of the two programs are alternately switched field by field and synthesized. Because the voice was skipping because
In the present invention, by allocating each channel of stereo audio to each audio recording of two programs, all audio can be recorded as monaural audio, and the problem of audio skipping can be eliminated.

Further, in the fourth invention, in contrast to the above-mentioned third invention, since the stereo sound becomes monaural sound in the third invention, the sound of each program is time-multiplexed and each channel of the stereo sound is changed. Record assignments. As a result, it is possible to record the sound of the two programs as stereo sound.

[Brief description of drawings]

FIG. 1 is a block diagram of a recording / reproducing apparatus according to an embodiment of the first invention.

FIG. 2 is a block diagram of a recording / reproducing apparatus according to another embodiment of the first invention.

FIG. 3 is a block diagram of a recording / reproducing apparatus according to an embodiment of the second invention.

FIG. 4 is a block diagram of a recording / reproducing apparatus according to another embodiment of the second invention.

FIG. 5 is a block diagram of a conventional recording / reproducing apparatus.

FIG. 6 is a block diagram of a recording / reproducing apparatus according to an embodiment of the third invention.

FIG. 7 is a block diagram of a recording / reproducing apparatus according to an embodiment of the fourth invention.

FIG. 8 is a block diagram showing a specific example of a multiplexing / recording unit of the same device.

FIG. 9 is an explanatory diagram of an embodiment of a video signal recording / reproducing method of the apparatus.

FIG. 10 is an explanatory diagram of an example of a recording / reproducing method of an audio signal of the apparatus.

[Explanation of symbols]

 1, 2, 14A, 14B, 14C Video signal input terminal 3 Video switch 4, 9 Recording / reproducing switch 5 Signal processing section 6 Control pulse generating section 7 Recording switch 8, 18, 32 Recording section 10, 23 Video signal output terminal 12 Playback Mode input terminal 13 Reproduction mode determination unit 15A, 15B, 15C Input signal processing unit 16 Recording synchronization signal processing unit 17 Recording signal processing unit 19 Reproduction signal processing unit 20A, 20B, 20C Output signal processing unit 21 Reproduction synchronization signal processing unit 22 Switch 24 magnetic tape 25 control section 26A, 26B, 26C track area 27 first right audio input terminal 28 first left audio input terminal 29 second right audio input terminal 30 second left audio input terminal 31 recording switch 34, 35 output switch 36 Right audio output terminal 36 Left audio output terminal 38, 39 Multiplexing unit 40, 41 Decomposing unit 44 First multiplex / decomposition audio input terminal 45 Second multiplex / decomposition audio input terminal 46, 47 AD converter 48 Multiplex decomposition switch 49, 50, 51, 52 Memory 54, 55, 56 Multiplex switch 53 Control pulse Generation unit 57, 58 DA converter 59 First multiplex / decomposed audio output terminal 60 Second multiplex / decomposed audio output terminal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 5/92 C 4227-5C

Claims (6)

[Claims] 1. A plurality of video signal input terminals, a plurality of video signal input terminals, an output terminal of the following recording section, and a control pulse generation section described below, which are connected based on a video selection pulse from the control pulse generation section. A video switch that selects one video signal from multiple input video signals during recording, and selects and outputs the output signal from the recording unit below during playback, the output terminal of the video switch, and the above multiple video signal input terminals. Is connected to one of the video signal input terminals and the following control pulse generation unit, and the recording / reproduction switching control pulse 1 from the control pulse generation unit selects the input signal from the above video signal input terminal at the time of recording, At the time of reproduction, it is connected to the first recording / reproducing switch that selects the output signal of the video switch, the output terminal of the first recording / reproducing switch, and the control pulse generation unit described below.
Video signal processing that synchronizes two programs to record two programs at the time of recording in the recording / playback shared circuit based on the signal processing control pulse from the control pulse generation unit, and plays one of the two programs recorded at the time of playback A signal processing section for performing the above, a reproduction mode input terminal, a control pulse generation section connected to the output terminal and the reproduction mode input terminal of the video switch for generating control pulses of the recording / reproducing apparatus of the present invention, and the output of the video switch. The terminal is connected to the output terminal of the signal processing section and the control pulse generation section, and the output signal from the video switch is selected when recording one program based on the recording mode control pulse from the control pulse generation section during recording, and when recording two programs. A recording switch for selecting an output signal of the signal processing unit, a recording unit connected to the output terminal of the recording switch for recording a video signal, and a video switch It is connected to the output terminal, the output terminal of the signal processing section, and the control pulse generation section, and selects the output signal from the video switch during recording based on the recording / reproduction switching control pulse 2 from the control pulse generation section, and during reproduction. Two
A second recording / reproducing switch for selecting an output signal from the signal processing unit in the case of recording a program, and an output signal from the video switch in the case of recording one program, and an output terminal of the second recording / reproducing switch. And a video signal output terminal for outputting a video signal for display. 2. A plurality of video signal input terminals, a plurality of video signal input terminals, an output terminal of the recording unit described below, and a video selection pulse input terminal, which are connected to a video selection pulse from the video selection pulse input terminal. Based on this, a video switch that selects one video signal from a plurality of input video signals during recording, and selects and outputs an output signal from the recording unit below during playback, an output terminal of the video switch, and the above-mentioned multiple video signal input terminals One of the video signal input terminals is connected to the control pulse generator below, and the recording / playback switching control pulse 1 from the control pulse generator selects the input signal from the video signal input terminal at the time of recording. , A first recording / reproducing switch for selecting the output signal of the video switch during reproduction, and a first
The recording / playback shared circuit is connected to the output terminal of the recording / reproducing switch and the following control pulse generation unit, and the recording / playback shared circuit is based on the signal processing control pulse from the control pulse generation unit. A signal processing unit for performing video signal processing for performing reproduction and reproducing one of two programs recorded during reproduction, a reproduction mode input terminal, a recording mode input terminal, an output terminal of a video switch and a reproduction mode input terminal. The control pulse generator is connected to the control pulse generator for generating the control pulse of the recording / reproducing apparatus of the present invention, the output terminal of the video switch, the output terminal of the signal processor, and the control pulse generator. Recording that selects the output signal from the video switch when recording one program and selects the output signal of the signal processing unit when recording two programs based on the recording mode control pulse of Switch, a recording unit connected to the output terminal of the recording switch for recording a video signal, an output terminal of the video switch, an output terminal of the signal processing unit, and the control pulse generation unit described above. Based on the recording / playback switching control pulse 2, the output signal from the video switch is selected at the time of recording, the output signal from the signal processing unit is selected at the time of recording two programs, and the video switch at the time of recording one program. Recording / reproducing, comprising a second recording / reproducing switch for selecting an output signal from the device, and a video signal output terminal connected to an output terminal of the second recording / reproducing switch and outputting a video signal for display. apparatus. 3. A plurality of video signal input terminals, a plurality of video signal input terminals, an output terminal of the following recording section, and a control pulse generation section described below are connected, and based on a video selection pulse from the control pulse generation section. A video switch that selects one video signal from multiple input video signals during recording, and selects and outputs the output signal from the recording unit below during playback, the output terminal of the video switch, and the above multiple video signal input terminals. Is connected to one of the video signal input terminals and the following control pulse generation unit, and the recording / reproduction switching control pulse 1 from the control pulse generation unit selects the input signal from the above video signal input terminal at the time of recording, At the time of reproduction, it is connected to the first recording / reproducing switch that selects the output signal of the video switch, the output terminal of the first recording / reproducing switch, and the control pulse generation unit described below.
Based on the signal processing control pulse from the control pulse generator, the recording / playback common circuit synchronizes two programs for each field in order to record two programs, and plays one of the two programs recorded during playback. It is connected to the signal processing section that performs video signal processing and the output terminal of the video switch, detects the field polarity of the output signal from the video switch (detects odd / even fields), and the output signal from the video switch records two programs. Connected to the output terminal of the video switch and the output terminal of the reproduction mode determination unit, which automatically determines whether it is recorded or one program has been recorded. It is connected to the control pulse generator that generates control pulses, the output terminal of the video switch, the output terminal of the signal processor, and the control pulse generator, and controls during recording. Based on the recording mode control pulse from the pulse generator, it is connected to the recording switch that selects the output signal from the video switch when recording one program and the output signal of the signal processing unit when recording two programs, and is connected to the output terminal of the recording switch. A recording unit for recording a video signal, an output terminal of a video switch, an output terminal of a signal processing unit, and a control signal generation unit are connected, and recording is performed based on a recording / reproduction switching control pulse 2 which is an output signal from the control signal generation unit. Sometimes the output signal from the video switch is selected, when playing back two programs, the output signal from the signal processor is selected, and when recording one program, the output signal from the video switch is selected. A recording / reproducing apparatus including a recording / reproducing switch and a video signal output terminal for outputting a video signal for display, which is connected to an output terminal of the second recording / reproducing switch. . 4. A plurality of video signal input terminals, a plurality of video signal input terminals, an output terminal of the following recording section, and a video selection pulse input terminal are connected, and based on a video selection pulse from the video selection pulse input terminal. A video switch that selects one video signal from multiple input video signals during recording, and selects and outputs the output signal from the recording unit below during playback, the output terminal of the video switch, and the above multiple video signal input terminals. Is connected to one of the video signal input terminals and the following control pulse generation unit, and the recording / reproduction switching control pulse 1 from the control pulse generation unit selects the input signal from the above video signal input terminal at the time of recording, At the time of reproduction, it is connected to the first recording / reproducing switch that selects the output signal of the video switch, the output terminal of the first recording / reproducing switch, and the control pulse generating unit described below, and the control pulse generator In the recording / playback shared circuit based on the signal processing control pulse from Narube, two programs are synchronized for each field in order to record two programs at the time of recording.
At the time of playback, it is connected to the signal processing unit that performs video signal processing for playing one of the two recorded programs and the output terminal of the video switch, and detects the field polarity of the output signal from the video switch (detects odd / even fields). ), A playback mode determination unit that automatically determines whether the output signal from the video switch is recorded as two programs or one program, and an output terminal of the video switch and an output terminal of the playback mode determination unit And a recording mode input terminal, and is connected to a control pulse generating section for generating control pulses of the recording / reproducing apparatus of the present invention, an output terminal of a video switch, an output terminal of a signal processing section, and a control pulse generating section. During recording, the output signal from the video switch is selected at the time of recording one program based on the recording mode control pulse from the control pulse generator, and the signal processing is performed at the time of recording two programs. Connected to the recording switch for selecting the output signal of the unit, the recording unit connected to the output terminal of the recording switch to record the video signal, the output terminal of the video switch, the output terminal of the signal processing unit, and the control signal generation unit, Based on the recording / reproduction switching control pulse 2 which is the output signal from the control signal generation unit, the output signal from the video switch is selected at the time of recording, and the output signal from the signal processing unit is selected at the time of recording two programs, In the case of recording one program, a second recording / reproducing switch for selecting the output signal from the video switch, and a second recording / reproducing switch
And a video signal output terminal for outputting a video signal for display, which is connected to the output terminal of the recording / reproducing switch of. 5. A first right audio input terminal and a left audio input terminal for inputting a first stereo audio, a second right audio input terminal for inputting a second stereo audio, and a first right audio input. The terminal is connected to the second right audio input terminal and outputs the input signal from the second right audio input terminal when recording two programs.
When recording a program, the recording switch that outputs the input signal from the first right audio input terminal, the output terminal of the recording switch and the first
Connected to the left audio input terminal of the recording unit for recording stereo sound, and to the right audio output terminal and left audio output terminal of the recording unit, the output signal from the left audio output terminal of the recording unit is connected when recording one program. An audio switch that outputs and outputs an output signal from the right audio output terminal of the recording section when recording two programs,
A left audio output switch that is connected to the first left audio input terminal and the output terminal of the audio switch, outputs the input signal from the first left audio input terminal during recording, and outputs the output signal from the audio switch during playback. , Connected to the first right audio input terminal and the right audio output terminal of the recording section, outputs the input signal from the first right audio input terminal during recording, and outputs the output signal from the right audio output terminal of the recording section during playback And a right audio output terminal connected to the output terminal of the left audio output switch, and a right audio output terminal connected to the output terminal of the right audio output switch. Recording / playback device. 6. A first right audio input terminal and a left audio input terminal for inputting a first stereo audio, a second right audio input terminal and a left audio input terminal for inputting a second stereo audio,
It is connected to the first right audio input terminal and the second right audio input terminal, and when recording two programs, the input signal from the first right audio input terminal and the input signal from the second right audio input terminal are time-compressed. A first audio multiplexing unit that outputs the input signal from the first right audio input terminal when recording one program,
It is connected to the first left audio input terminal and the second left audio input terminal, and when recording two programs, the input signal from the first left audio input terminal and the input signal from the second left audio input terminal are time-compressed. A second audio multiplexing unit that outputs the input signal from the first left audio input terminal when recording one program,
A recording unit that is connected to the output terminals of the first audio multiplexing unit and the output terminal of the second audio multiplexing unit and that records stereo audio, and is connected to the left audio output terminal of the recording unit, and is connected to the recording unit when recording one program. A first audio decomposing unit that outputs an output signal from the left audio output terminal, decomposes the time-compressed and multiplexed output signal from the left audio output terminal of the recording unit when recording two programs, and outputs the time-decompressed signal. Connected to the right audio output terminal of the recording section, the output signal from the right audio output terminal of the recording section is output when recording one program, and the time compression multiplexed output signal from the right audio output terminal of the recording section is output when recording two programs. A second audio decomposing unit for decomposing, time-expanding, and outputting, and a first left audio input terminal and two output terminals of the first audio decomposing unit are connected, and when recording, the first left audio input terminal Outputs the input signal, and the voice decomposer during playback Connected to a left audio output switch for outputting one of the two output signals (audio corresponding to the reproduced video), a first right audio input terminal and two output terminals of the second audio decomposing unit, Outputs the input signal from the first right audio input terminal during recording, and one of the two output signals from the audio decomposition unit during playback (audio corresponding to the playback video)
And a right audio output terminal connected to an output terminal of the left audio output switch, and a right audio output terminal connected to an output terminal of the right audio output switch. Recording / playback device.