JPH0435477A - Video tape recorder - Google Patents

Abstract

PURPOSE:To obtain an inexpensive video tape recorder which can select one of the plural recorded channels to reproduce it by providing plural output signal processing parts connecting video/voice signals in the order of transmission and a reproduction part equipped with an output amplifier control part selecting video/voice output processing. CONSTITUTION:Input signal processing part 1a, 1b, and 1c dividing the video/ voice signals of plural inputting channels by 1 feet, a recording signal processing part 3 transmitting these signals while staggering their transmission time, and a reproduction part 9 reproducing the video/voice signals from the plural channels while staggering their reproduction time from a recorded recording medium and selecting one of these reproduced signals to transmit it to a display device, are provided. Namely, a recording synchronizing signal processing part 2 discriminates 1 field's video/voice signals A1, B1, and C1, and generates a third control signal beta designating the track area of magnetic tape. Next, the recording signal processing part 3 transmits the 1 field's video/voice signals A1, B1, and C1 in the decided order to a recording amplifier 4 by a second control signal alpha. Thus, plural channels can be recorded with an inexpensive device.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a video tape recorder, and in particular, the present invention relates to a video tape recorder, and particularly to a video tape recorder that records a plurality of channels at the same time, and
This article is about a video cheap recorder that can select and play audio signals.

[Conventional technology]

-i, the video cheap recorder is not shown in the drawings, or it selects one channel from the tuner section, records the video and audio signals on a storage medium, and then magnetically transfers the video and audio signals from the stored storage medium. It was read by a head and reproduced on the cathode ray tube of a television receiver.

Attempts have also been made to record multiple channels simultaneously, attaching multiple expensive magnetic heads, or arranging magnetic storage media separately, and various other improvements have been made.

[Invention or problem to be solved]

However, conventional video chip recorders with this type of improvement have the disadvantage that they are as expensive as a plurality of video chip recorders.

An object of the present invention is to eliminate such drawbacks and provide an inexpensive video tape recorder that can record television broadcasts of multiple channels and select and play back any one of the recorded channels. It is to be.

[Means to solve the problem]

The video tape recorder of the present invention includes a plurality of input signal processing units that time-divide video and audio signals inputted from a plurality of channels one field at a time, and generate a first control signal when the time-division is performed; A first control signal is input, a second control signal determines the order of the divided video and audio signals of the field, and a third control signal identifies the video and audio signals of the field of each channel. a recording signal processing section that receives the second control signal and sequentially transmits each of the video and audio signals of the - field, and a recording signal processing section that sequentially transmits each of the video and audio signals of the - field. a recording mechanism section for storing the third control signal in different helically traversing track areas of the tape-shaped storage medium and in parallel areas of the tape-shaped storage medium located at the front ends of the respective corresponding track areas; a recording unit having a recording unit; and a playback device that sequentially reads the video/audio signals of each field stored in each track area of the tape-shaped storage medium and a third control signal stored in a parallel area at the front end of the track area. a mechanism section; a reproduction synchronization signal processing section that generates a fourth control signal for determining the video/audio signal of the field to be read in synchronization with the third control signal; Played above-
a reproduction signal processing unit that separates the field video and audio signals into respective channels; a plurality of output signal processing units that connect the field video and audio signals separated for each channel in the order in which they are sent; The apparatus includes a playback section having an output amplifier control section for selecting one of these video/audio output signals.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

1(a) and (b) are block diagrams of a recording section and a reproducing section of a video tape recorder showing an embodiment of the present invention, and FIG. 2 shows a recording pattern of the magnetic tape of the tape recorder of FIG. 1. It is a diagram. This video cheap recorder is composed of a recording section and a reproducing section shown in FIGS. 1(a) and 1(b).

As shown in FIG. 1(a), the recording unit time-divides the video/audio signals A, B, and C input from three channels into A I , B 1, and cl, one field at a time, and When the first control signal α1. βl and γ
Three input signal processing units 1a, 1b and 1c that generate l
and input the first control signals αl, β1 and γ1,
A second control signal α that determines the order of the divided one-field video/audio signals AI, Bl, and cl, and one-field video/audio signals A1 . B, and C1
A recording synchronizing signal processing unit 2 that generates a third control signal β for identifying the field, and a recording synchronization signal processing unit 2 that receives the second control signal α and sequentially sends each of the video/audio signals A, , B, and C1 of the − field. The signal processing unit 3 sequentially transfers the video/audio signals A□, B1, and C1 of this field to different track areas 5a, 5b, and 5C helically crossing the magnetic tape 6 in FIG. It has a recording amplifier 4 and a recording mechanism section (not shown) for storing the control signal .beta. in the parallel region 7 of the magnetic tape 6 located at the front end of the corresponding track regions 5a, 5b and 5C, respectively.

In addition, as shown in 1[J(b), the playback unit also outputs one field of video/audio signals A□ stored in order in each track area 5a, 5b, and 5C of the magnetic tape 6 in FIG.
, Bl and C1 and the third control signal β stored in the parallel area 7 at the front end of the track area (
(not shown) and reproduction amplifier 8, one field of video/audio signal A0 is read in synchronization with the third control signal β.
, B, and C1, and one field of video-audio signal A1=B reproduced by the fourth control signal Δ.
A reproduction signal processing unit 9 that separates □ and C1 into respective channels, and a plurality of output signals that connect one field of video/audio signals A, , B, and C1 separated for each channel in the order in which they are sent. It has processing units 11a, llb, and 11C, and an output amplifier control unit 13 that selects any one of these video/audio output signals.

Next, the operation of this video tail recorder will be explained again with reference to FIGS. 1(a) and (b) and FIG. 2. 3
When recording video and audio from three channels, first record video and audio from three channels, referring to Figure 1 (a).
Audio signals A, B, and C are input to input signal processing units 1a, 1b and IC. Next, each input signal processing unit 1a, 1b, and 1C time-divides the video/audio signal one field at a time, and at the same time generates first control signals a1, β1, and γ1 for delimiting the divided video/audio signal. Next, these sequentially divided video/audio signals A1, B1, and C1 of each field are input to the recording signal processing section 3.

Further, the first control signals α1, β1, and γ1 are input to the recording synchronization signal processing section 2. Next, one field of video/audio signals AI, Bl, and CI are processed by the recording synchronization signal processing section 2.
A second control signal α for ordering is sent to the recording signal processing section 3. At the same time, the recording synchronization signal processing unit 2 identifies one field of video/audio signals A1, B1, and C1, and generates a third control signal β specifying the track area of the magnetic tape. Next, the recording signal processing unit 3 sends one field of video/audio signals A1, B□, and C1 to the recording amplifier 4 in a predetermined order using the second control signal α. One field of video/audio signals A1, B1 and C1 sent in this order
are sent to a video head (not shown) via a recording amplifier 4, and are recorded in track areas 5a, 5b, and 5C of the magnetic tape 6 shown in FIG. recorded. On the other hand, the aforementioned third control signal .beta. is sent to the video head and recorded on the parallel area 7 of the magnetic tape shown in FIG.

Next, the operation of playing back a recorded video will be explained. First, from the magnetic tape 6 shown in FIG. 2, three types of video and audio signals for one field are input from the video head to the reproduction signal processing section 9 via the reproduction amplifier 8. Furthermore, at the same time, the third control signal β is reproduced and input to the reproduction synchronization signal processing section 10. Next, in response to the third control signal β, the reproduction synchronization signal processing unit 10 uses a fourth
A control signal Δ is generated. Moreover, this fourth control signal Δ
Accordingly, the reproduced signal processing section 9 separates the reproduced one-field video/audio signals AI, Bl, and C1 into respective channels, and sends them to the output signal processing sections 11a, 1' 1b, and llc. Next, one of the video/audio output signals sent to the output amplifier 12 is selected by the selection signal of the output amplifier control section 13, and the selected video/audio signal is sent to the display device, and the desired channel is selected. You can watch TV programs being broadcast.

Furthermore, if a standard display device is connected after the output amplifier 12, for example, three different television programs can be viewed at the same time.

〔Effect of the invention〕

As explained above, the present invention includes an input signal processing section that divides input video/audio signals of a plurality of channels field by field, a recording signal processing section that temporally shifts these signals and sends them to a video head, and a plurality of By providing a playback unit that plays back video and audio signals from the channels in a time-shifted manner from a recording medium, and selects one of the played back signals and sends it to the display device, an inexpensive This has the effect of providing a video tape recorder that can record a plurality of channels with one device.

Synchronous signal processing section, 3... Recording signal processing section, 4... Recording amplifier, 5a, 5b, 5C... Track area, 6.
. . . Magnetic tape, 7 . . . Parallel region, 8 . . . Reproduction amplifier, 9 . section, 12--output amplifier, 13--output amplifier control section.

Claims (1)

[Claims] The video and audio signals input from multiple channels are time-divided one field at a time, and the first
a plurality of input signal processing units that receive the first control signal and determine the order of the divided video/audio signals of the one field; a recording synchronization signal processing unit that generates a third control signal for identifying the video/audio signal of the field;
A recording signal processing unit that sequentially sends each of the audio signals, and a recording signal processing unit that sequentially sends each of the video and audio signals of one field to different track areas that helically traverse the tape-shaped storage medium, and respectively corresponds to the third control signal. a recording unit having a recording mechanism for storing data in a parallel area of the tape-shaped storage medium located at a front end of the track area; and an image of each field stored in sequence in each track area of the tape-shaped storage medium. - a reproduction mechanism unit that sequentially reads the audio signal and a third control signal stored in a parallel area at the front end of the track area; and a reproduction mechanism unit that reads the audio signal and a third control signal stored in a parallel area at the front end of the track area; a reproduction synchronization signal processing section that generates a fourth control signal for discrimination; a reproduction signal processing section that separates the video/audio signal of the one field reproduced according to the fourth control signal into respective channels; A playback device comprising a plurality of output signal processing units that connect the one field of video/audio signals separated for each channel in the order in which they are sent, and an output amplifier control unit that selects one of these video/audio output signals. A videotape recorder comprising: