JP2718905B2 - Magnetic tape playback system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to a magnetic tape reproducing system.
It is about the system. [0002] BACKGROUND OF THE INVENTION Video including recording and / or playback units
Many different recording methods used in videotape devices
It is known that each videotape
The device is designed to be used in only one way.
You. Therefore, tapes recorded by one device can be copied to another device.
Since it cannot be played back with
There is no compatibility between different devices. If you get high quality performance
If necessary, consume large amounts of tape and use complex signal processing.
Must use a recording format that requires
Rather, this is a burden on portable recording devices. I
However, we are working to make portable recording devices more compact.
To reduce tape consumption and reduce the number of circuits.
The performance will be lower if the recording format is simplified by reducing the number.
Result. [0003] Ranking of digital television systems
It was proposed to use (hierarchy: hierarchy).
This method requires the high quality required for studio equipment
In order to achieve high performance, higher data rate (rate)
Devices are used to obtain compactness in portable devices
For this purpose, lower data rate devices are used. Television
Such ranking for the Y, I, and Q components of the
For devices with high data rates,
Are sampled at a ratio of 4: 2: 2, respectively.
For devices with lower data rates each of the above components
Sampling is performed at a ratio of 2: 2: 1. For example, think now
13.5M corresponding to rank 4 level
Hz sampling frequency, 2 and
The levels of 1 are 6.75 MHz and 3.375 MH, respectively.
represents the frequency of z. According to this ranking,
Big difference between tagio recorders and portable recorders
A device that can provide flexibility but has a high data rate
Recording formats for low and low data rate devices
Means that a tape recorded on one device can be directly
Easily interchangeable in that it cannot be regenerated
I can't let it. Change the recording format of one system to another
To convert to the recording format of
Recorded information sampled at the bell rank is played back,
Level and re-recorded, or
Must be sent through the studio. [0004] SUMMARY OF THE INVENTION Video tape recording and playback of the present invention.
In the multiplex recording format for raw equipment, the tape
Vertically divided into longitudinal segments,
Is a trace where all raster information is recorded at fractional resolution.
Assigned to the client. Different data rates
Or the recording format for the studio recording device and
Tailored to various features of devices such as portable recording devices
Can be used. [0005] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An example will be described. [0006] Digital video tape recording and playback
In equipment, the recorded information is usually displayed in a raster.
Each screen (ie,
Television field or frame)
Have been More compact in portable devices
While studio equipment can focus on quality.
Digital video tape recording and playback equipment
A multiplex recording format is applied for use. This many
In the dual recording format, the tape can have multiple longitudinal segments.
Segment, and each segment has 1
Divided by the number of tape segments in the longitudinal direction of the
Part or fraction equal to a fraction of a segment)
Allocated to record all raster information at pixel resolution
Have been. Initially, the video is at some predetermined frequency
Pixels (pixels or samples) are digitized by number
It is. These pixels are complex or component (component
) Associated with any of the video information. Each pixel
Is connected to one of the longitudinal segments through the transducer.
Sent to one specific truck. Such a truck
Be placed in each segment along the tape running direction
If present, the direction crossing the tape running direction at an angle
In some cases. [0007] The multiple recording format according to the present invention is preferred.
A preferred embodiment is shown in FIG. This is a video
Are being recorded. Figure 1
A longitudinal track containing, for example, audio and cues
8, 9 are the fixed transducer heads 3 of FIG.
10 scans on the tape 5. Y, I, Q components
Represents one raster scan line, as shown in FIG.
Sampled at a normal ratio of 4: 2: 2. Further
In addition, the tape 5 has just two longitudinal segments 6 and
7 and all the raster information at 1/2 resolution
Recorded in each longitudinal tape segment.
Therefore, two Y tracks, one I track, and
One Q track has four tracks in each longitudinal segment
It is arranged in the division. And of these trucks
Each crosses the tape running direction in a helical pattern
Is scanned. As shown in FIG.
Each track is driven by a motor 312 and a drive unit 314.
Each transaction on the raster scanner 300 driven by
Sujusa Y₁ , Y_Two , Y_Three , Y_Four , I₁ , I_Two ,
Q₁, Q_Two Are scanned simultaneously. Tape is for those skilled in the art
A drive mechanism including a capstan 316 having a well-known configuration.
Is sent across the surface of the head wheel 300.
In FIG. 3, the transducer is located below the tape 5.
So they should be shown as discontinuous or dotted lines
However, due to the small dimensions,
It is indicated by a solid line. In Fig. 3, the tape is wound around 270 °.
The attachment state is shown. However, substantially 36
Any winding angle, including 0 ° omega (Ω) winding
Can be used. In addition, each 4-track section is
Field or frame in a format known to the vendor
Information about the system. All video information
For all raster scan lines, track Y₁ Is the Y pixel
Track Y including 1, 5, 9, 13 etc._Two Is the Y pixel
Track Y including 2, 6, 10, 14 etc._Three Is Y pixel
Tracks 3, 7, 11, 15, etc._Four Is Y pic
Track I including cells 4, 8, 12, 18, etc.₁ Is I
Track 1, including_Two Is I pic
Track Q including cells 2, 4, 6, 8 etc.₁Is Q Pixel
Tracks 1, 3, 5, 7, etc._Two Is the Q pixel
2, 4, 6, 8 and the like. Use this recording format
Then, compactness and portability are not so important
In the case of a geo recording unit, video information is recorded on both sides of the tape.
Recorded at full resolution on one longitudinal segment
For portable recording units where compactness and portability are important.
Video information is stored on one longitudinal segment of the tape.
Can be recorded only at the resolution of 1/2. [0008] One separate tape segment
To record video information at a resolution of 1/2, Y, I,
The Q component can be used in many other ways than those described above with respect to FIG.
Can be configured. For example, the odd raster run
Video information relevant only to the gaze is on one longitudinal tape
The even raster scan, recorded on the segment, while
The video information associated with the line is transferred to the other longitudinal tape segment.
Is recorded in the comment. Also, the odd field
Only relevant video information is stored on one longitudinal tape segment.
Event, but only the even-numbered fields
Concatenated video information is the other longitudinal tape segment
Will be recorded. In addition, "Interpolated for digital video
Recording format (Interleaved Re
coding Format for Digita
l Video) ”on July 12, 1983
U.S. Pat. No. 4,393,414, issued to U.S. Pat.
The concept of the invention shown in this document is illustrated in FIG.
The longitudinal tape segment is shown in FIG.
Interleave checker board
By recording each turn, the concept of the present invention
Can be used together. As already described with reference to FIG.
On the canna, the helical pattern Y shown in FIG.₁ ,
Y_Two , Y_Three , Y_Four , I₁ , I_Two , Q₁ And Q_Two Trad
Transducer means are provided for each of the
It will be easy to understand. Y, I and Q component pics
A cell is connected to each of the transducers on this scanner 300.
Is shown in FIG. Selected features
A fixed recording format is assigned to each of the Y, I, and Q components.
You can have any number of tracks hit
In this configuration, the recording format of 4: 2: 2 in FIG.
The general situation where the number of different tracks is unlimited
Has been described. The pixel of each signal component is
Individual switches associated with the Q, I and Y components respectively
10, 12, and 14. Switch 10,1
2 and 14 are shown as mechanical switches.
It is easily understood that equivalent electronic switches are sometimes used.
I understand. Each switch is assigned to its signal component
Number of output input positions equal to the number of format tracks
have. Each output from switches 10, 12, and 14
Is a recording medium passing through one of the transducers shown in FIG.
It is guided to the upper track in a known manner. Switch 10,
The injection positions of 12 and 14 are modulo counter 1 respectively.
Controlled individually by 6,18,20 output counts
You. Each modulo counter 16, 18, and 20 is
The signal composition of the switch 10, 12 or 14
Equals the number of format tracks allocated to the minute
It has a count output of the number and the particular format selected.
Programmable start count when required
Has output. In the recording format of FIG.
The four components of each longitudinal tape segment
Only one track of a track segment is allocated
The modulo counters 16 and 18
Use flip-flops in hardware configurations
be able to. Each modulo counter 16, 18, 20
Is the switch 10, 12, or 14
Driven by the pixel rate clock of the associated signal component
You. As an example, the frequency corresponding to the level of rank “4”
The clock 22 representing the number (13.5 MHz) is modulo
• supplied directly to this to drive the counter 20
You. Clock 22 is $ 2 unit (unit divided by 2)
And modulo counters 16 and 1
To generate the frequency of level "2" required to drive
You. Modulo counter 20 has programmable start count
It is of the form. The horizontal sync signal is applied to each modulo counter.
To the start count inputs of the
Therefore, the recording of each raster scan line is the first Y picture in that line.
Start with cell. Each switch 10, 12 or 14
Are the respective modulo counters 16, 18 or 20
Set at each different track position for each counting output of
This allows the Y, I and Q component pixels to be in individual longitudinal directions.
Those indicated tracks in the tape segment
It is led to. Materialization of a specific recording format
The switching configuration to regenerate the
Specific switch selected to record format
And therefore a switch for such reproduction.
The configuration is not shown to simplify the figure. That
As a result, the reproduction switch for the recording switching configuration of FIG.
Ching configuration is tape track and modulo count
Y, I and
A separate switch for receiving each of the Q component pixels
And then use each step to reconstruct the appropriate playback signal.
Control the switch. Of course, the modulo counter is
Horizontal synchronization signal and clock in a manner similar to that shown in
It may be driven by a switching configuration. Of course, the reproducing unit of the apparatus is the table shown in FIG.
Full resolution or 1/2 resolution recording format
Video information as a display signal from one of
You can also. The playback unit is the recording unit in the reverse order.
Only perform the reverse function of
Is clear that all resolution formats are fine
You. Therefore, the transducer in the playback unit is
All tracks from the tracks in both longitudinal segments of the
Video information and process it in a well-known manner.
And extract the display signal. According to the present invention, the reproduction unit
The set can also be used in the same way as one longitudinal set of tape.
Playback a half resolution format from the segment
be able to. In this case, the image obtained from the display signal
Is of a quality that is convenient for most studios.
At least, for example, ENG (Electronic New
Use of s Gathering
Can be satisfied. However, digital video
In the concept of ranking, for example, US Pat.
An interpolation technique such as that shown in US Pat.
Using well-known error compensation or concealment techniques such as
The quality level signal is converted to a high quality level signal.
Therefore, a display signal of a quality suitable for most studios
Process video information at 1/2 resolution to extract
The concealment device separately or in
Play ranked transcoders as part
Can be incorporated into the unit. With such a rank
Other ways of transcoder are published in October 1981
Pages 956 to 95 of "SMPTE Journal"
"A Simple Family of Di" on page 9
digital Filters For A Binar
y Hierarchy (Digital Fill for Binary Hierarchy)
John Pirosh, a simple family of
(John P. Rossi)
You. Using a portable unit, the text of FIG.
One longitudinal seg facing one side of the loop
Only record video information at half resolution
And the other longitudinal side of the tape facing the other side of the tape
The direction segment is left blank. tape·
Make full use of the deck, thereby making the portable recording unit
To enhance the functional characteristics of the knit,
This blank portion is also another preferred embodiment of the present invention shown in FIG.
In a preferred embodiment, video information is recorded at half the resolution.
You. This is done while the tape runs its full length.
In the example, each longitudinal segment of the tape is recorded individually
Or played and placed facing one side of the tape
Longitudinal segment recorded or played
Later, the tape is "flipped" and the other
Video information in longitudinal segments arranged facing the side
Record or play back from it. Therefore, each of FIG.
Tracks in longitudinal segments tape in different directions
To run. However, tape decks have
As in yet another embodiment of the invention, its longitudinal segment
When recording video information on each of the
To rewind between playing the information,
Tracks in each longitudinal segment tie the tape in the same direction
Let it run. Further, the recording format shown in FIG.
The component video information is shown in the
Composite video information is recorded in substantially the same format.
Or played. [0012] As shown in FIG.
Matte embodiment only relates to partial raster resolution
So, the number of transcoders on the scanner
Recording and playback system that works only with recording formats
The device can reduce this. Examples of such devices
Portable recording unit and electronic news editor (E
NG) There is a television recording device, such a device
For recording or reproducing the format of FIG.
The scanner is shown in FIG. Record or playback mode
Each of the transducers on the scanner during each
Y, I and from each or each of the transducers
4 in order to derive the Q and Q component pixels.
Switching configurations can also be used. In the multiplex recording format shown in FIGS. 1 and 5,
Contains only two longitudinal tape segments
But within the basic concept of the invention, more
You can include these segments in other formats
You. Separate on the scanner to pull out various formats
The transducers can also be arranged in the manner described above. Ma
Also, the video information must be
Can be arranged in a different way. Included in the scope of the invention
Some examples of other types included are shown in FIGS.
ing. In the figure, only one possible tape is used for the scanner.
And the array of transducers on the scanner is
Shown for format. Figure 7 (C)
Now, the tandem transducer pair A, B and C,
D is one place around the scanner as shown in FIG.
These are arranged as shown in FIG. 7 (B).
Axially separated by a distance equal to about half its length
ing. The transducer for each tandem pair is approximately 346
The longitudinal direction of the tape wrapped around the scanner over °
Separating tracks in a tape segment. Love
Each rotation of the nana will cause each tandem transducer
Pair located in one longitudinal tape segment
Longitudinal track segment with tracks A and B
And other longitudinal tape segments
Longitudinal track with tracks C and D
Scan the track of the segment. In the format of Fig. 8 (C)
Is a tandem transducer pair A, B and C, D
Is located at a first location on the periphery of the scanner,
One, dandem transducers E, F and G, H
Is 180 degrees from the first position as shown in FIG.
It is located at a second location on the periphery of the canna. FIG.
As shown in (B), a tandem transducer pair
A and B share the tandem transducer pair C and D
In the axial direction of the jana, it is separated by almost half the axial length.
Tandem transducers
E and F are tandem transducers G and H
In the axial direction of the jana, it is separated by almost half the axial length.
Are located. Tandem Transducer vs. E, F
Should be indicated by dotted lines, but because they are small
It is shown in solid lines for ease of use. Each tandem vs.
The transducer orbits the scanner through 180 °
Two longitudinal segments on each tape
Rack. As shown in FIG.
During the first 180 ° of the turn, Tandem Transge
A and B are initially the lower longitudinal tape segments
Tracks A and B are scanned, and then tandem
Sudsuers C and D are upper longitudinal tape segments
Tracks C and D are scanned. Next, the rotation of each scanner
During the last 180 °, tandem transducer
E and F are the tracks of the lower longitudinal tape segment
Scan E and F, then tandem transducer
G and H are tracks of the upper longitudinal tape segment
G and H are scanned. FIG. 9 shows a recording format according to the present invention.
Normal recording and recording devices such as a recording device and a reproducing device shown in FIG.
And / or can also be used for playback devices. this
Both devices have tracks of any desired number of channels.
However, for the sake of explanation, two track channels
Pick up channels 1 and 2. In the recording apparatus shown in FIG.
The modified Y, I and Q components are disclosed in U.S. Pat.
According to the configuration shown in FIG.
Each input of the constructed pixel formatter 20
Supplied to The formatter 20
The Y clock is 13.5 MHz, but the I and Q clocks
The frequency is 6.75 MHz. Formatter for explanation
An 8-bit parallel format is used for each of the 20 inputs.
ing. The hardware configuration shown in FIG.
4-track channel led to tape segment
For each of Y, I and Q components in a recording device having
Acts as a pixel formatter with each input
You. However, the recording device of FIG. 9 supplies one input.
Of the I component and the Q component supplied to the other input.
It should be understood that it has only two inputs with both components
It is. In such devices, the pixel formatter
The multiplex circuit inside is the required interface standard
give. The pixel formatter 20 is Y and / or
Is a predetermined combination of I and / or Q pixels
Is the tape scanning formatter 2 in each track / channel.
Divided into two. 13.5 MHz clock at input
, Horizontal and vertical synchronization, vertical field partial signal V /
5 or V / 6 (for 525 television systems)
5 revolutions / field and 625 televisions
6 rotations / field in the system
Video output at the output)
Data rate (11.8 MHz) clock is used for each tape scan format.
The formatter 22 is supplied to the
For video tape recorder control and synchronization information
The video rate should be taped while leaving the appropriate "blank".
Operate to convert to data rate. For convenience of explanation, this
All control signals such as
These signals are shown to be provided only by
It should be understood that rack channel 1 is also supplied
It is. As is well known to those skilled in the art, video
Data rate (11.8 MHz) clock is video information rate + data
Digital sync rate + parity rate
And vertical sync redundancy are then removed
You. Pixel combinations are run in each track / channel.
Error detection and correction (EDAC) from check formatter 22
/ Parity insertion unit 24, this unit
24 is for correcting or detecting errors in the recording or reproducing process.
To add computer redundancy and thus DV
Some of the TR overhead will be described. Pixel set
Matching goes through EDAC / parity insertion unit 24
Supplied to control the Then each track
In the channel, the pixel combination is EDAC / parity
Sent from the insertion unit to the flutter buffer 26,
Buffer 28 is associated with the video information being recorded
Adjust the time axis error (TBE) in the structure of the recording device
Or modify. As is well known to those skilled in the art,
The buffer 26 has sufficient capacity to fit TBE.
Contains ri. This memory is synchronized with the input video
Data rate (11.8 MHz) clock that controls the input of
And the mechanical rate that controls the output synchronized with the tape feed
(11.8 MHz) clock. Then,
The parallel format of the combination of xells is
Therefore, it is converted to a serial format. This converter
28 is the mechanical factor directly supplied to control the input
Clock and recording rate clock to control its output
And the clock supplied via the × 8 unit 29
Have. Pixel combinations are pre-
And a synchronization insertion unit 30. this
The preamble and sync insertion unit 30
Digit occupying some number of blocks per start and line
It works to set both of the synchro synchronization. Pixel
The combination passes through the preamble and synchronization insertion unit 30
A recording rate clock is provided to control the
You. Pixel combinations for each channel are preamble and
And channel unit from the synchronization unit 30
32, this track / channel coder 32
Raw digital according to the tape recording code to be used.
Work to organize (organize)
You. Information is sent via track channel coder 32
A recording rate clock is supplied to control the
You. Then, this information in each channel is
2. Transducer off via normal recording amplifier 34
Is supplied to the exchange unit 38. Turn off this transducer
The transfer head 36 in the tape transfer device 38
A position signal is supplied from the eel. Some transges
(Run only tracks A, E, C, and G in FIG. 8C)
4 tandem transducers in FIG. 8B to be inspected
4 single transducers in the same position as the pair
Is located on the head wheel.
The head wheel in the tape transporter 38 to an appropriate angle.
Head whisk to guide information to tape that is sent around
Is placed on the tool. Servo reference signal is timing
-Supplied from the unit 40 to the transfer device 38. Taimin
Unit 40 includes a video synchronization signal and a head wheel.
A clock position signal is supplied and all clock signals
Signal, sync signal and vertical field partial signal
You. As described above, the reproducing device is the reverse of the recording device.
The functions are performed in reverse order. Therefore, in FIG.
In the reproducing apparatus, the head wheel in the tape transfer device 50 is
The recorded information on the tape that is transported around
Several transducers located on the wheel (Fig.
9 in the serial format)
Will be picked up. Transducer switching unit 5
2 uses this information in track channels 1 and 2
It is distributed to the raw amplifier 54. The position signal is the head wheel
To the switching unit 52. Each amplifier 54 is
Use the information in the rack channels to get the raw digital information
And generates a mechanical rate clock synchronized with the transfer device 50.
To the track channel decoder 56
Supply. The raw digital information in each track channel
The report (still in serial format) is a preamble
And the coaxial extractor 58, where the start
Information and digital synchronization information are removed. Preamble
And control the information sent through the synchronous extractor
A mechanical rate clock is provided for Control on each channel
The converter 60 receives the serial bit flow, and
Combination of pixels in 8-bit parallel format for mats
Convert to The mechanical rate clock is supplied directly to converter 60.
And the regeneration rate (11.8
MHz) clock. In each channel
Pixel combinations are sent from converter 60 to flutter
Supplied to the fan 62. Flutter buffer 62 plays
In the playback device mechanism related to the video information being
Adjust and correct all time axis errors (TBE). This
This is pixelated by the playback rate (11.8 MHz) clock.
Video data rate into buffer 62.
(11.8 MHz)
Will be The difference signal from the time comparator 64 is
-Each is supplied to the buffer 62. Adjust TBE
In addition to that, the flutter buffer 62
Any timing or mechanical that occurs between channels
The above difference as a programmable delay to adjust the error
Respond to signals. Each preamble and sync extractor 58
Is supplied to the time comparator 64, where the difference
Used to retrieve signals. Each track channel
The combination of pixels in the file from the flutter buffer 62
It is supplied to the EDAC unit 66. EDAC unit
66 rectifies the correctable error, and notifies the detectable error.
Rag). EDAC unit 66
Data to control the sending of pixel combinations through
The clock of the data rate is supplied. Each track / channel
The combination of pixels inside is changed from EDAC66 to tape scan.
To the shape device, ie the tape scanning defmeter 68,
Through another path by using additional bits
Sent with a detectable error flag. Differential
Meter 68 eliminates overhead "blanks"
And convert from tape rate to video rate. Data in the input
Data rate clock, horizontal and vertical sync signals, vertical feed
At the output part signal V / 5 or V / 6, and at the output
A control signal including a 13.5 MHz clock is applied to each default.
It is supplied to the material 68. Deformers in each channel
Combination of pixels from again sent through another path
Pixel deformatter with detectable flags detected
70. Deformer 70 is 13.5 MHz
Controlled by both clocks
Works to collect pixel combinations from the
Y, I, and Q pixels are separated by different error concealment means 72.
Through to the individual video outputs. For this, an example
See, for example, U.S. Pat. No. 4,376,45 for composite pixel recording.
Techniques described in No. 5, or recording of complex pixels
Use the technology shown there that is available for
Done using Deformer 70 and hiding means 72
Through a detectable error flag or another path
The 13.5MHz clock is transmitted by each concealment means.
It controls the advance of the pixel through 72. Servo reference
The signal is sent from the timing unit 74 to the tape transport 50.
To the machine clock and track channel
Playback rate (11.8M) extracted from the
Hz) clock, sync signal and filter
Field part signal or vertical sync and head wheel position
From the timing unit 74 to which the reset signal is supplied
Is done. The pixel deformatter 70 is a recording device of FIG.
Hardware similar to pixel formatter 20
A, and the switch in it
Connects to a single output that leads to multiple inputs and video outputs
Has been continued. FIG. 11 shows a progressive scanning television on a magnetic tape.
Multi-segment recording format for recording
Is shown. The format is progressive scanning television.
Non-interlaced video lines of each frame of the
2,3 ... n ... in different longitudinal segments
First, it is separated into A and B interlaced fields. time
Of adjacent non-interlaced video lines
By inverting the frame by frame,
The vision signal is output at each longitudinal segment.
Recorded television with a tarred field
Is converted to an optional signal. This interlaced fee
Television signal with the original non-interlaced
・ Image scenes (pictures) contained in television signals
The entire image of the scene), ie the whole area, the top and
Represents bottom, left and right. Therefore, each longitudinal direction in FIG.
In the directional segment, the recorded interlaced television
Frame of the helical signal
Two interlaced fields recorded in the rack
Consists of A and B. In this case, field A is non-in
Extracted from the first frame of the tarece television signal
And field B is a temporally adjacent second field
Withdrawn from the frame. For example, field A is an odd number
No. 1,3,5 ... n ... 593,595 ... (where n
Is an odd number), while field B is an even numbered line 2, 4, 6
.., 594, 596,. Each longitudinal segment
The recorded pixel resolution during the
1/2 or less than the pixel resolution of the image scene
It is a fraction. FIG. 12 shows a format according to the format shown in FIG.
To read or write a magnetic tape composed of
Record implementing features of the invention that can be used for
/ Reproducing device 120 is shown. For example, in the recording operation mode
Is the non-interlaced video signal V_PSIs connected to the terminal 130.
Be paid. Video signal V_PSIs a progressive scanning camera in the usual way.
Generated by the camera device, for example, 50 frames per second
625 lines per image frame at the frame repetition rate
Generates interlaced video lines. Therefore, non-inter
Race video signal V_PSTotal video lines per frame
The number is the video in the frame of the video line for the PAL system.
E is equal to the total number of lines. However, the video signal V_PSIs
Since it is non-interlaced, the frame rate f_V Is PAL
Twice that of the formula, while the linearity is 2f_H And this is also P
It is twice the linearity of the AL method. Video signal V_PSIs analog or
Digital format, black and white signal or power
Color signal, and if it is a color signal,
Combined form or component form (component form)
Either may be used. Further, the video signal V_PSIs the component format
Then the component is as in the MAC format
Multiplexed temporally on a single channel
Or in component form on separate channels
Well, in this case, for each longitudinal segment,
Another transducer is similar to the configuration of the scanner of FIG.
In the configuration of the scanner, each of the Y, I and Q component signals is divided.
Hit. If the video signal V_PSHave separate channels
In the case of the component format, the processing stage shown in FIG.
Duplicated for each channel. The recording mode of the recording / reproducing apparatus 120 shown in FIG.
Mode, the recording / playback switches RP1 and RP2
The memory is in contact with each recording terminal R. Non-interlaced bee
Video signal V_PSIs supplied to the terminal 128 through the switch.
You. FIG. 13 (A) shows an odd line number n in FIG.
Start with any video line number n that is the same line number associated.
Non-interlaced video signal V_PSVideo line numbers for
Show the sequence. Video signal V_PSIs non-interlaced
Therefore, the connection time of the predetermined video line is 1 / 2f_H so
is there. Non-interlaced video signal V_PSIs shown in FIG.
Clock signal 2f_H Of modulo 3 by CK
Single pole, triple throw switch S1 pole (movable
). In this case, 2f_H , CK's clock
Is 2f_H be equivalent to. FIG. 13A shows the state of the terminal 128.
Generated video signal V_PSBased on the number of video lines
Arm A of Juro 3 switch S1_r Connection position and connection
And between. Therefore, for example, video line n is connected to terminal 1
28, arm A_r Contacts the terminal D1,
When video line n + 1 appears at terminal 128, arm A_r Is
The terminal D2 contacts the terminal D2 and the video terminal n + 2 is
Arm A_r Contacts the terminal D3. This contact
The sequence repeats on a modulo 3 basis. The contacts D1 to D3 are connected to the memories M1 to M3.
Coupled to each first end, each memory has a predetermined desired
Store pixel line equivalents according to pixel resolution
Has memory capacity. The other ends of the memories M1 to M3
Is the arm A connected to the pole P_p , And pole Q
Arm A_q Each of the contacts C1 to C2 of the two-pole switch S2 including
It is connected to C3. Switch S2 arm is tie
Clock signal provided by the
No. f_H , CK counterclockwise in modulo 3 fashion
Rotate. The two-pole, double-throw switch S3 is connected to the switch S2.
A pole R coupled to pole P and a pole coupled to pole Q of switch S2.
Pole S. The arm of switch S3 is
F_V , CK according to the non-interlaced video signal V_PS
The frame rate of the contact position shown by the solid line and the dotted line
Circulates between the contact position. Thus, for example,
Race video signal V_PSFrame 1 video line appears
During this period, the arm of the switch S3 is indicated by its solid line.
In the contact position, and in the next frame 2, the arm
It is at the contact position indicated by the line. Therefore, the period of frame 1
Medium, a video signal generated at the contact terminal B1 of the switch S3
V1 is a video signal V generated at the pole P of the switch S2._p To
The video signal V2 generated at the contact terminal B2 is equal to the switch.
Video signal V generated at pole Q of switch S2_q be equivalent to. Anti
In the pair position, a similar relationship is established during the next frame 2.
maintain. The memories M1 to M3 are stored on a first-in first-out basis (FI
FO) memory. Each memory is specific
Based on internal internal memory read / write clocking configuration
Signal in either direction with respect to the input / output action.
Can be passed through. For example, each memory is
A multiplexer steering stage coupled to both ends
Like a ping-pong between the read and write functions
It consists of two parallel delay lines operated. FIG.
In the recording operation mode, the terminals are connected to the terminals D1 to D3.
The ends of the selected memories M1 to M3 act as signal inputs
The other end of the memory coupled to each of the terminals C1 to C3 is
Works as a moly output. Write signal samples to memories M1 to M3
For this purpose, the timing unit 122 is stored in the memory M1.
Supply write clocks WR1 and CK to write to memory M2.
Clocks WR2 and CK and write to memory M3
Only clocks WR3 and CK are supplied. Memory M1 to M
3 to read signal samples from
The unit 122 supplies the read clocks R1 and CK to the memory M1.
Supply and supply read clocks R2 and CK to the memory M2
And supplies the read clocks R3 and CK to the memory M3.
You. Non-interlaced video signal generated at terminal 128
V_PSIs the timing unit 122 in the recording operation mode.
To disable the generation of write and read clocks.
Interlaced video signal V_PSVideo lines 1, 2, 3, ...
Synchronize with the sequence of n ..._H , CK signal, f
_H , CK signal, and f_V , CK signal frequency and position
Phase to non-interlaced video signal V_PSHorizontal
And the vertical blanking period. FIGS. 13C to 13E are non-interlaced.
・ Video signal V_PSMemory as a function of the number of video lines in
The contents of M1 to M3 are shown. Video signal V_PSLine
n is at the terminal 128 and the contact of the switch S1 at the contact D1.
Room A_r , Line n is written to memory M1.
Arm A_r Are present sequentially in the contact terminals D2 and D3
Line n between the next two non-interlaced lines
Stays at 1. Video signal V_PSLine n + 1 is terminal 1
Arm A when it appears at 28_r Is connected to the contact terminal D2.
The line n + 1 is connected to the memory M by the respective write clocks.
Written in 2. Arm A_r Are sequentially contact terminals D3 and
When in D1, note between the next two non-interlaced lines
Stays in the middle. Video signal V_PSLine n + 2 is the terminal
When appearing at 128, arm A_r Is to the contact terminal D3
The line n + 2 is connected to the memory M by each write clock.
Written in 3. Arm A_r Are the contact terminals D1 and
When at D2, line n + 2 is the next two non-interlaced
It remains in the memory M3 during the line. Arm A_r Contact
When at terminal D1, modulo 3 cycles of switch S1
The ring repeats. Arm A_p And A_q Is the connection of switch S2
Memory M1 in connection with rotating between points C1 to C3
To M3 are sequentially read from the memory.
You. The read rate from each memory is の of the write rate
The capacity of one line of the memory is as shown in FIG.
As shown in (G), each arm A_p And A_q Is each contact end
Period 1 / f equal to the time in children C1 to C3_H Reading inside
Will be issued. In the synchronous reading of the memories M1 to M3
As shown in FIGS. 13F to 13I, the arm A_p
Is in the contact terminal C1, and the arm A_q Is in contact terminal C2
The line n stored in the memory M1 and the memory M2
Line n + 1 stored at
Is read. For proper reading,
Contacts C1 and C1 to read out lines n and n + 1
2 is the non-interlaced video shown in FIG.
E signal V_PSLines n + 2 and n + 3 are sequentially connected to the terminal 128.
Synchronization of operations occurs as occurs during the appearance. Arm position in the next order of switch S2
In the installation, arm A_p Is in the contact terminal C3 and the arm A_q
Is at the contact terminal C1. At this contact position,
Line n + 2 is read from memory M3 and stored line n +
3 is read from M1. Connection of the final order of the switch S2
In the touch position, during a given modulo 3 operating cycle,
Mu A_p Is in the contact terminal C2 and the arm A_q Is the contact terminal C
There are three. Thereby, the stored line n + 4 is stored in the memory
The line n + 5 read and stored from M2 is stored in memory M3.
Is read from. The switches S1 to S3 as described above and
As a result of the synchronous operation of the memories M1 to M3, non-interlace
・ Video signal V_PSIs two separate interlaced video
It is converted into video signals V1 and V2. Non-interlaced
・ Video signal V_PSIn frame 1 of the
The video signal V1 is an odd-numbered line of the frame, that is, a field.
And the interlaced video signal V2 is an even number
, Ie, field B. Non-interlaced
Video signal V_PSSwitch S3 for frame 2
Is in the contact position indicated by the dotted line in FIG.
The interlace video signal V1 is a video line of the field B.
And the interlaced video signal V2 is
Line. The interlaced video signal V1 is recorded / reproduced.
The video signal V2 is supplied to the raw electronic circuit stage 128 and recorded.
/ Playback electronics 127, both in record mode
Operating on the interlaced video signal V_i1And Inn
Tarase video signal V_i2Occurs. Video signal V_i1
And V_i2Is the scanner stage 123
The scanner device of FIG.
Recorded on each longitudinal segment 1 and 2 of the air tape.
To be properly conditioned. The structure of the scanner device 129 is shown in FIG.
It is similar to the structure of the canna
Sujusa Y₁ , Y_Three , I₁ , Q₁ Is the transformer of FIG.
The upper level transformer is associated with the juicer stage 123.
Sujusa Y_Two , Y_Four , I_Two, Q_Two Is a transducer
Associated with step 124. Tape the scanner device 129
The angle around which it wraps around is approximately equal to 360 °
Omega (Ω) winding shown in Figure 3 or alpha
(Α) of the full 360 ° provided by the wrap configuration
The winding angle may be used. The timing element 122 and the scanner shown in FIG.
And control with the capstan servo control stage 125
The signals are passed in both directions. This scanner and key
The gap servo control stage 125 includes the scanner device 129.
And cue and headwheel systems associated in a normal manner
Controls recording and playback of control track pulses. What
Note that the track is not shown in FIG. Also,
FIG. 11 shows that all other audio
The rack has been omitted. The non-in recorded on the magnetic tape shown in FIG.
Tarase video signal V_PSIn order to reproduce
The recording / reproducing device 120 is provided with switches RP1 and RP2.
Reproduction by bringing the arm into contact with each reproduction terminal PB
Operate in mode. Transge of scanner device 129
The heads of the sensor stages 123 and 124
In the recording track of each of the segments 1 and 2
From the scanner device 129 to the terminal 12
8 is generated. This signal flow is recorded / replayed.
The signal flow and book described when the raw device was in recording mode
Qualitatively the opposite. Switches S1 to S3 in playback mode
And the synchronized operation of the memories M1 to M3 are described above.
The operation is substantially the same as in the recording mode.
Is omitted. In the transducer stages 123 and 124
Therefore, the sense from each longitudinal segment track
Known interlaced video signal V_i1And V_i2Is
Generated and appear at terminal 128
Race video signal V_PSNon-interlaced sequential video lines
Is generated. The control routine provided by the control stage 125
According to rack and / or cue track information,
Vertical and horizontal timing from timing unit 122
Terminal 1 by the synchronization generator 121 which receives the signaling information.
Vertical and non-interlaced video signals
And horizontal sync components are inserted. In this way, everything
Reconfigured non-in
Tarase video signal V_PSBy the recording / reproducing device 120
Occurs on the signal line 130. In this case, the signal line 1
30 corresponds to both longitudinal segments 1 and 2 of FIG.
It becomes an output signal line from the recorded track. Reproduce the recorded magnetic tape of FIG.
When using a portable unit for
One of the longitudinal directions, eg longitudinal segment 1
A scan that can scan a track with only segments
A recording / reproducing device having a journal device may be used. Po
FIG. 6 shows the scanner device in the portable playback unit.
Scanner transducer similar to
In a transducer, one longitudinal segment
Fewer transges than needed to regenerate
Is used. The playback unit is shown in FIG.
Interlaced video such as tared video signal V1
Play the signal. This signal is fed directly to the synchronization generator.
And the synchronization information is inserted.
Signal is generated. Interlaced playback television signal
No. in all segments of the magnetic tape of FIG.
Recorded non-a
All of the image scenes contained in the interlaced video signal.
Includes interlaced video lines representing regions. Therefore, this playback unit is
Scanning without using the memory of the capacity to store
Interlaced Scan Television from Television Format
That it can be immediately converted to a vision format
It has the advantage. In return, the vertical solution
Resolution is the pixel resolution of the original non-interlaced video signal
The length of one side of the magnetic tape in FIG.
The interface obtained when playing only the hand segment
The resolution of the race video signal is coarse.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an embodiment of a multiplex recording format according to the principle of the present invention. FIG. 2 shows a sequence of Y, I and Q samples to be recorded in tracks of each longitudinal segment of the magnetic tape having the multiplex recording format shown in FIG. FIG. 3 is a diagram schematically showing a scanner device used for scanning a track according to the multiplex recording format shown in FIG. 1; FIG. 4 is a diagram schematically illustrating a configuration for guiding Y, I, and Q component pixels to each of the transducers of FIG. 3; FIG. 5 illustrates a multiple recording format according to an aspect of the invention adapted for use in a portable tape unit. FIG. 6 schematically illustrates an arrangement of transducers on a scanner of a portable unit adapted for use with a multiple recording format in accordance with an aspect of the invention. 7A is a diagram showing a tape winding state when scanning a track in the multiplex recording format shown in FIG. 7C, and FIG. 7B is a diagram showing a track in the multiplex recording format shown in FIG. A diagram showing the position of the transducer on the scanner when scanning
(C) is a diagram showing a track in a multiplex recording format. 8A is a diagram showing a tape winding state when scanning a track in the multiplex recording format shown in FIG. 8C, and FIG. 8B is a diagram showing a track in the multiplex recording format shown in FIG. A diagram showing the position of the transducer on the scanner when scanning
(C) is a diagram showing another type of track according to the multiplex recording format. FIG. 9 illustrates a recording and playback pixel improvement apparatus adapted for use with the recording formats of FIGS. 1, 5, 7 (C) and 8 (C). FIG. 10 illustrates a recording and playback pixel improvement apparatus adapted for use with the recording formats of FIGS. 1, 5, 7 (C) and 8 (C). FIG. 11 is a diagram showing another embodiment of the multiplex recording format according to the present invention. FIG. 12 is a block diagram showing a recording / reproducing apparatus capable of recording and reproducing a television signal according to the recording format shown in FIG. FIG. 13 is a timing chart useful for explaining the operation of the device shown in FIG. 12; [Description of Signs] 123, 124 Transducer 130 Input Terminal

Claims (1)

(57) [Claims] A system for reproducing from a magnetic tape recording non-interlaced video lines of a progressive scan television signal representing a scanned scene, said magnetic tape having a pair of longitudinal tape segments, wherein said tape segments are Dividing the width of the tape along its length, the odd lines of alternating frames and the even lines of intervening frames in the progressive scan television signal are combined into a plurality of helical tracks in the first group of pairs of the long tape segments. And wherein the even lines of the alternating frames and the odd lines of the intervening frames are recorded on a plurality of helical tracks in a second group of pairs of the longitudinal tape segments, wherein the playback system comprises: Recording tracks on only one of the pair of longitudinal tape segments Transducer means for scanning a block, and means for generating a system output signal used for interlaced display of the scene only in response to signals reproduced by the transducer means. Magnetic tape playback system. 2. A system for reproducing from a magnetic tape recording non-interlaced video lines of a progressive scan television signal representing a scanned scene, said magnetic tape having a pair of longitudinal tape segments, wherein said tape segments are Dividing the width of the tape along its length, the odd lines of alternating frames and the even lines of intervening frames in the progressive scan television signal are combined into a plurality of helical tracks in the first group of pairs of the long tape segments. And wherein the even lines of the alternating frames and the odd lines of the intervening frames are recorded on a plurality of helical tracks in a second group of pairs of the longitudinal tape segments, wherein the playback system comprises: A recording tape in said first group of pairs of longitudinal tape segments; First transducer means for scanning a rack; second transducer means for scanning recording tracks in the second group of the pair of longitudinal tape segments; reproduced by both the first and second transducer means. Means for generating a system output signal used for non-interlaced display of the scene in response to the signal.