JPS62241492A - Recording and reproducing device for video signal - Google Patents

Abstract

PURPOSE: To reduce the size, weight, and cost of a device by narrowing down the occupation band of a video signal which contains luminance information and chromaticity information, and dividing it by at least two channels and decreasing tape recording density per channel. CONSTITUTION:A band compressing circuit 100 compresses the occupation band of the video signal consisting of a luminance signal Y and two chromaticity signals C1 and C2 without causing deterioration in picture quality, and also divides the band by two channels so that the signal occupation band is not uniform between the channels. Namely, the wide-band video signal can be band- compressed without deterioration in picture quality, and divided by two channels and recorded so that the occupation band of the signal is almost uniform, so a recording band of each channel is reduced efficiently neither too much nor too less. Consequently, a wide-band video signal is recorded and reproduced by a magnetic recording and reproducing device such as VTR by using a small- sized drum.

Description

[Detailed description of the invention]

[Field of Application of Compact Press] The present invention relates to a recording/reproducing apparatus such as a VTR, and particularly to a recording/reproducing apparatus suitable for dividing and recording a wideband video signal into a plurality of channels. [Prior art] Much higher M#l [, MIII] than the current television system.
! New high-definition television systems, such as the so-called high-definition television provided by iJx, are being studied, which have several times more image information than conventional TVs and therefore require several times as wide a bandwidth. this? In order to put the i6 thin-film television into practical use, the realization of a magnetic recording device such as a VTR that can properly record and playback wide-band theatrical footage is an important issue.

[There is. This Iw
A prototype example of a VTR compatible with I-definition television is published in Television Society Technical Report VOL, 8° Shoulder 55 (1984).
It is reported in a document entitled 'VTR for high-definition television' by Ogetani, Tateno, and Tsujiyo (November 2013). This VTR was prototyped for studio use, and used a relatively large-diameter head drum in order to achieve a wide band, and recorded a 1m 4H video by dividing it into 4 channels of multi-tracks. method is adopted. [Problems to be solved by the invention] In order to widely spread the above-mentioned high-definition television in general households, etc., it is necessary to make the VTR for I% narrow-screen television smaller;
Reducing the cost of the device, record your time with a small cassette! Enabling IgJ playback has become an important issue, and in order to achieve this, the head drum must be made smaller to make the device smaller and more compact, and the number of heads and channels used must be reduced to improve IgJ road standards. Efforts are needed to reduce costs by downsizing. However, because the recording accuracy of tape increases accordingly, it is technically difficult.
The recording time was also cut short by 1bIj, leading to problems where both parties could not answer each other's questions. In view of the above, an object of the present invention is to narrow the occupied band of a video signal including luminance information and chromaticity information, and to narrow the occupied band by at least two
It is an object of the present invention to provide a recording and reproducing apparatus compatible with l'PIm television, which can reduce the tape recording density per channel by dividing the tape into two channels, thereby realizing a reduction in size, weight, weight, and cost of the apparatus. [Means for solving the problem] The above purpose is to compress the luminance information by thinning out the pixels among the wideband video information, and to limit the band in advance or reduce the pixels for the chromaticity information. Bandwidth compression is performed by thinning out and time-division multiplexing of the two pieces of chromaticity information, and each of these pieces of information is divided into five proportions so that the signal bands occupied by multiple channels are approximately equal.
This is achieved by recording. More specifically, at least the effective portion of the luminance information of the occupied band Bf is sequentially sampled, and the number of effective sampled pixels per screen (one field or one frame) is /! The first
/2 of the remaining sampled pixels
or less is extracted as the second luminance ff1I information,
In addition, the two chromaticity information are converted to line-sequential chromaticity information,
The first luminance information, the luminance information of M42, the line sequential chromaticity information, and t. All signal occupied bands are B, /N (N is the highest number of 2 or more)
The data is divided into N channels line by line and time-divisionally recorded in multiple pages so that the data becomes IC. By the above method, both the brightness response tank and chromaticity information thinned out at the time of recording are decimated by the recorded and reproduced data that are temporally or spatially close to each other on one screen. The original video information will be restored. [Action] Red (/<), Green (G), ! If each occupied band of the primary color image No. 1 of (#) is BW, the total is 5 X B
However, according to the present invention, this broadband IK9 is compressed to 4, and recording and playback can be performed in 2 channels with an occupied bandwidth of By/2 per channel. A magnetic recording and reproducing device that can be used can be provided. As mentioned above. YoV, Hobuta 1'M' and Toshiko are going to record this three-primary color boaring machine.
)-) and two chromaticity information (C1 and to) for BF/2 per channel! Since the tape is divided into two channels and recorded so that it has a wide band, the overall band is equivalently compressed to A, and the occupied band per channel is also narrow, so the recording density of the tape can be reduced. The head drum can be made smaller, and the head drum can be made smaller.
You can reduce the number of heads used and channel weight,
The device can be made smaller, lighter, and lower in cost. [Embodiment] An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows an embodiment of a rotary head-type air-sensory recording and reproducing apparatus that divides and records a wide-band spectral signal into two channels. The video signals to be recorded are red (R) and green (G). # (B) three primary colors! ! 511! : The output signals are respectively terminals 1α and 1b. It is input to 1C. The encoder 10 performs matrix calculations on these three primary color gaps i to produce a luminance signal.
and two chromaticity signals C,,,C,,. This encoder 10's R degree is Y. is suitably band-limited according to the required band by a low-pass filter 11, and here an H signal signal Y limited to band B by j-1 is output from this filter 11. The two chromaticity signals 1 from the digital encoder 10 are also band limited both horizontally and vertically as required by low pass filters 12 and 13, respectively. This vertical band limitation is effective in preventing vertical aliasing distortion caused by line-sequential conversion in a switching circuit 104, which will be described later. Here, two chromaticity signals q and q, both limited to the band By/2, are output from filters 12 and 13, respectively. The block 100 indicated by a dashed line compresses the occupied bandwidth of the video signal between the luminance value 9Y and the two chromaticity signals C1 in such a way that image quality deterioration is unlikely to occur, and the signal occupied bandwidth is independent between channels. This is a band compression circuit for dividing into two channels so as not to cause r. The operation of this band compression circuit 100 will be explained using the sampling turn shown in FIG. In Figure 7JJ2, Lt
t Ltt Lst... is the video signal line '4M
(1) is an example of the sampling pattern for the luminance signal Y, (Ill is the chromaticity signal 'I + "2
This is an example of a sampling pattern for the line Lζ, which is indicated by +111 in FIG. L≦, L2, ... is 2 for the field indicated by actual deer.
: indicates a field interlaced by 1 interlace scanning. In this case, there is also an interlaced field for the luminance signal in FIG. 2 (1), but
It is omitted here. In FIG. 1, the luminance signal Y of the occupied band B#- outputted from the filter 11 is sampled in the A/D conversion circuit 101 using a sampling clock CRY with a period τ (τ in FIG. 2) and converted into a digital signal. converted into a signal. Here, in order to prevent aliasing distortion from occurring, it is preferable that the frequency of the sampling bookmark CRY is determined to satisfy the following equation, but this is not a limiting condition of the present invention. 2 X f3r <j's (-4) ... (1) T
Although not shown, the sample bookmark CRT is generated in synchronization with the four-stage output that is included in the image signal or input separately together with it. 105 is a memory composed of /< A M 71, etc., which stores the second
The sample data corresponding to the pixels indicated by the circle in FIG.
In addition, sample data corresponding to the pixels indicated by the X marks in Figure 2 (1) are sequentially written into the memory 103 as the luminance signal Y2. In the example of the sampling pattern in FIG. 2, the pixels marked with ○ are LII Ll1 L3. Li2...
are extracted in each line, whereas the pixels marked with
-Ll 1 '3 P LII j... is extracted every other line. Memory 10 of these valleys J1j
Although not shown, writing to 6 is performed using a write clock generated based on the sample bookmark ci<yy, and +ts marked with ○ is written to the sample bookmark C/
? Period 2τ (frequency h/2) obtained by dividing Y into several cycles
The data is written every line (2) of the memory 103 based on the data written in the data (CR). In addition, the x-immediate pixel is written to the memory 1 based on the write a-task C'R2 with a period of 2τ (frequency h/2), which is obtained by delaying the write a-tuck CR, by the time τ.
It is written to ■ in 03 every other line. As described above, out of all 11j pixels obtained by sampling the luminance signal Y with the sampling book CRY of period τ, the numbered pixel (pixel corresponding to the circle mark) is first extracted and sequentially convoluted into I of the memory 103. In rare cases, the inferior pixel (pixel corresponding to the X mark) is extracted from the remaining pixels in the lagoon and stored in memory 1.
It is sequentially convolved into ■ in 03. The thus written sample data for each pixel is sequentially read out from the memory 103 by the readout clock generated based on the write clock. This t light taker a
The frequency of the tsuk can be appropriately determined as necessary (although it is not a limitation of the present invention, here, the above writing a)
Read signals CRr and CR; of the same frequency as the signals CR, . . . , CR, respectively, are generated. read a tsuku c
Rζ (frequency h/2), the sample data is sequentially read line by line from ■ in the memory 103, and therefore the band of luminance 4M, Y, which is converted to analog No. 16 by the D/A conversion circuit 121 and output, is as follows. B F/2, and compared to the band B of the original luminance signal Y, an output whose band is compressed to ``<,4 is obtained from the above-mentioned conversion circuit 121. Similarly, the read a ts CR1! (frequency f5/2 ), the sample data is sequentially read from ■ in the memory 10!1 at every other line period, and is converted into an analog signal by the D/A f conversion circuit 122 via the terminal α of the data switching circuit 110 and output. The band of the luminance signal Y2 is also the same <B
y/2, and an output whose band is compressed to B compared to the original band can be obtained from the q conversion circuit 122. 104 is a switching circuit for switching the simultaneous chromaticity signal to the line sequential chromaticity signal, and the two chromaticity signals of the occupied band By/2 outputted from the filters 12 and 15 respectively *C1
are respectively supplied to terminals α and b of a switching circuit 104, and are mutually switched line by line by this switching circuit 104, so that the lines L+ + L3 . L5. ... Teha color J Shishin gC1 is selected and output, line L11 Li2 L6
1..., chromaticity times +jq is selectively output. In this way, the chromaticity +yC- converted by the switching circuit 104 into #jl+@the following formula is converted into (11
), it is sampled by a sampling clock CRC with a period of 4τ (frequency m·/4) and converted into a digital signal. The frequency of this sampling bookmark CRC is not a limiting condition of the present invention, but here it is set to h/4 and 1. Ru. 11 above. /D Henboku 1 OJ approx. 102, Figure 2 (1
The sample data corresponding to the pixels indicated by ○ in No. 11 (or the pixels indicated by X in the interlaced field indicated by broken lines) is 2): The period generated based on the sampling clock (, 'Rc). ar (frequency kA)σ
- files are sequentially written to the mother line 2 of the memory 1fJ5 from the a tsuku CR, ic. The sample data for each pixel thus stored is the n-included a ts (-R
One line is read out from 111 of the memory 105 sequentially at a monthly cycle by the i-axis link CR with a period of 2τ (frequency h/2) generated based on 3, and the output is sent to the terminal of the editor switching circuit 110. The D/A conversion circuit 122 converts the signal into an ANAMIG signal. The data switching circuit 110 is connected to the
'f4 degree store number 4 output from 'f4 degree store number 4 and upper self memory 106
The trend output from +II! If! ? niiro summer thought C
? This is a circuit for multiplexing and outputting the time, minute, and hour signals. α in FIG. 3 is the luminance 1 output from the circuit 121.
g shows Y1, b shows the luminance signal 4 output from the circuit 122 in a time-division manner, and gland-sequential chromaticity 1H, C1 and q. First, during a period of 1H (H is a horizontal scanning period) in which the luminance signal Y on line L is output from the memory 103-I in 1a', the circuit 110 is connected to the terminal α side, and the memory 105-I is connected to the terminal α side. -If the luminance signal 4 of line L is Φ
t, is retrieved and output, and in this period the above memo l710! l
- Reading of ■ is stopped. Subsequently, the memory 103
-1 to the next line L, the brightness gY, is output, and during this 1H period, the above-mentioned 11M110 is connected to terminal b.
1111, and the chromaticity signal C is read and output from the memo IJ103-m, and during this period, the memo 1J1
03-IF reading is stopped. Here, as is clear from the above description, the above circuit 104
The line-sequential chromaticity C of the occupied band By/2 from is sampled at a frequency of /4 in the circuit 102.
Since it is sampled at C, its occupied band is compressed to B,/11 and written to memory, and this sampled signal is
Since it is read from memory at twice the frequency rHLefs/2,
The occupied band of the chromaticity signal C output from the memo IJ1o3-m is expanded to By/2, and its time axis is compressed to a square. Therefore, the above 1H period (i.e., line L!
(period in which the luminance signal 4 is output from the circuit 121),
From the circuit 122, the color signal "wjc" of the line L,
Then, the chromaticity signal of the next line L is compressed on the time axis and output as B. Thereafter, the above operation is repeated, so as shown in figure m5, the number of times W! From 1121, each line L1. L2゜R
The luminance signals Y1 of 3, . Ls. Luminance signal Y (thinned to pixel ft/2) of R5s...
2 and the chromaticity signal C of Iwao I@arrow are outputted alternately in lines in a time-division manner. Further, each output from the above-mentioned (b) paths 121 and 122 both has an occupied band of By/2. In this way, the output (luminance signal Y1) from the circuit 121 of the band compression circuit 100 is subjected to temperature pre-emphasis in the recording video processing circuit 51, then subjected to circumference change BN4 (YM), and then sent via the recording N-signal circuit 33. The signal is recorded once on the magnetic tape 3 as a channel 1 signal by the rotating magnetic heads 51α and 51b. Similarly, the output from the above circuit Wi 122 of the band compression circuit 100 (time-division multiplexed JiIL inverse signal 4 and chromaticity signal C) is appropriately recorded in the above circuit 51 by the distribution video processing circuit 32. , recording amplification circuit 34
of channel 2 to the magnetic tape 3 via the rotating magnetic heads 52α and 52b! It is recorded sequentially as a number. Here, the heads 51α and 51b have the same azimuth and are mounted at an angle of 180° on the concentric circumference of the head drum (not shown), and the heads 52α and 52b also have the same azimuth. (having a different azimuth from the heads 51α, 51b) are mounted on the concentric circumference of the head drum at an angle of 180° with respect to each other, and with a difference in proximity to the heads 51α, 51b. The magnetic tape 5 is wrapped around the head drum in multiples of slightly more than 180 degrees to form the magnetic heads 51α, 51,6, and 52α. 52h. Therefore, on the magnetic tape 3, as shown in FIG. 4, the track 1 (old T13. ``Ill...'' is formed, and the track stone 2°T is formed by the channel 10 head 51b (1) set meal.
14 t 1161... or frost formed on each of these tracks. T, 2 t T19 + 1°! 4jT15j... The channel 1 signal shown at α in FIG. 5 above is recorded in the order of 4jT15j...
t... is formed, and the track f2□t 1"14 t Tm 1
... is formed, and each of these tracks has "T1 j l
nt-24,. 45. At 111, 100 episodes of channel 2 shown in Figure 3k are recorded on my own. The operation during playback will be briefly explained. The number 1g recorded on the magnetic tape 6 by being divided into a plurality of tracks as described above is recorded on the magnetic heads 51α and 51b. The same magnetic head 6 corresponding to 52α, and 2b, respectively.
1a blb, 62a, 6211, when recording [1at. 11 @ Tsugi Nyu from the Tamaji truck. That is, by the heads 61cL and 61b of channel 1,
Tu t flt + from Changi, Le 1 track
In Tsz t I' and Ill of..., the 1g issue of the above channel 1 was alternately played,
So 1t! -I was turned into a giant, and my father became one.
The signal to be read is output from this circuit 4B. The writer output signal from the circuit 45 is FM demodulated at the circuit 41, and then converted into a bird signal to α in Figure 3 above. The signal Y1 is outputted from this circuit 41 and sent to the A/Ll Keshimata circuit 201. For FJ swimming, channel 2 heads 62α and 6
2b From K, 7 from channel 2 track; t +
42. The signals of channel 2 are alternately reproduced in the order of 83 t "24 +..., amplified and alternately switched by the reproduction stage 1 partition circuit 44, and then the Nyu video processing circuit 42 outputs the E record. Similar to the circuit 41, the overcurrent reproduction is also integrated, and the time-division multiplexed chromaticity 1, 4, and ml chromaticity, C, which correspond to b in FIG. 3, are output from this circuit 42. A
11) Supplied to conversion circuit 202. The clock 200 shown in the figure is the signal of the channel 1 of the upper 5α mouthpiece 41 and the signal of the channel 1 of the circuit 42 mentioned above.
This is a band expansion circuit that complements the information that has been thinned out without being re-recorded from the signal by using information from the recorder that is close to it in terms of time or horizon, and restores it correctly based on the time axis and band. be. The operation of this band expansion [g1%2oo] will be explained using the sputum shape diagram of each part shown in Figure 5 and the sampling pattern diagram of Figure 2 of ThrJ. First of all, the above episode lol! r
The brightness signal gY outputted from 41 is the conversion time Wl!
In r201, the sample data corresponding to the pixels marked with ○ in +11 in FIG.
Then, an L signal is sent to the line motherboard by the input signal CP1 of frequency h/2 generated based on the above sample print check CPY.
They are sequentially written in the following order: l tLt t Lm vL4t... On the other hand, the time-division luminance signal 4 output from the circuit 42
And chromaticity 1! The period C is converted to period 2τ(
During the period in which the brightness IfN signal 4 is first inputted, the frequency 7JP generated based on the sampling clock CPC is
/2 barakomi atsuk CP2 allows the above figure 2 (11
The sample data from the circuit 202 corresponding to the pixel indicated by the cross is written to the square of the memo IJ 205, and data writing to the square of the memory 203 is suspended during this period. Next, during the period in which Iromo Tsukumitsuku C is manually generated, the frequency generated based on the sample book C "PC" is /20
By convolution a-cps, the above figure 2 (○ in ii)
I: IJ (or × for the field shown tentatively)
Sample data from the circuit 202 corresponding to the pixel indicated by mark ) is written to the memory 17205-m, and data writing to the memory 17203-II is prohibited during this period. Therefore, only the luminance qi number Y2 is extracted and written in the memo 1J203-II, and the memory 203-II is also extracted and written.
Only the above color signal gC is extracted and written to H. 211 is the brightness g! 212 is a C interpolation circuit for carrying out pixel interpolation of #I and Y; and 212 is a C interpolation circuit for performing color concealment C pixel interpolation in a #sequential type and converting it into a simultaneous type f. Teru F included in the above memo 1J203-1! L belief Y1
is read line by line by the read clock CP1' with period 2τ (period tJIL IN, fs/2), and
As shown at α in the figure, the brightness M number Y of the valley line is “1”.
j T2 t T3 t "4jLSt..." are sequentially read and supplied to one side of the Y interpolation circuit 211. The #transformation gY2 convoluted into the memo 17203-n is
Each line is read repeatedly twice by the reading a-cp with a period of 2τ (frequency h/2), and as a result, as shown in Fig. 5b, the luminance *-e of one line becomes two consecutive lines. teLl j Ll tL3゜Ll1 LSF LS
They are sequentially output in the order of F... and supplied to the other side of the Y interpolation circuit 211. In this Y interpolation circuit 211, the luminance signal Y from the memory 17203-1, (α in FIG. 5)
and the luminance signal 4 from the memory 205-II (b in FIG. 5) are selected and extracted alternately at every period τ and synthesized into one luminance signal 5 as shown in C in FIG. 5. Y' is output. Of this luminance signal Y', line tst t
Luminance signal output as st Lst... Y
3s + yls t... is the original line "11Lst"
The luminance signal ζ of Lst... (pixel indicated by Q mark in Fig. 2 (11)) and the luminance signal 4 of the same line (pixel indicated by mark X in Fig. 2 (11)) are synthesized with a time τ shift from each other. Therefore, the original luminance information Y is correctly restored.On the other hand, the luminance signal Y output as the line 'QtL42L6e...
1 mouth '43 t Y65 + ... is the luminance signal Y of the original line "!tL4j"61 ... (Diagram 2 (
pixel of the 11th circle) and the line of the 11th eye Llj L
l1 L5? ...'s J4 degree signal 4 (condolence 2 evil (1)
1 line) are synthesized with a lag of 1C time τ from each other. That is,
Line L2. which was not recorded or reproduced and was not transmitted (FIG. 2, 11). ”41 LSt...indicated by a blank space) Luminance l
[! The 1st 1H report was reproduced and transmitted (#A2
Since the interpolation is performed by the vertical pixel cancellation in the figure (indicated by the cross mark on the line L++ Lst Lst . . . in 11), the original brightness of 1'N is approximately restored. In general, the information on 1IlII ↑ has a unique correlation between lines, so by the above interpolation, 11! It is possible to significantly rewrite the alignment of iI-based thinning to 1-negative. Luminance value %-Y' outputted from the circuit 211, converted to analog 15g by the wA change circuit 221, and outputted
has the same occupied band HW as the original luminance value gY, which is the peak power of the filter 110, due to the above pixel interpolation. Incidentally, the line-sequential chromaticity No. 1g C written in the above memo 17205-11 is successively d-damped by the thread removal a to c p; with a period of 4τ (frequency h/4). As such, writing to memory 203-III is at frequency fJ2.
The oath is performed by a tsuk CP3, while the redemption is performed by reading a ts CP2 of /a at the frequency of 7-4, so the time axis is doubled by writing, vt, and taking. As shown in FIG. 5d, the line "It L
In St LSF..., the chromaticity signal q is on the line L2jL
4tL151 . . . , the chromaticity signal q is output according to the following formula +1#Il111m with the original regular time axis. The sequential chromaticity 1gC outputted from the memory 205-m is subjected to pixel interpolation by the C interpolation circuit 212, and the line sequential chromaticity is converted to a simultaneous chromaticity signal, and two simultaneous chromaticity signals ca1 and C □ is output from this circuit 212. The pixel interpolation in this C interpolation circuit 212 is performed using a similar color signal from 2 lines 11 or 2 lines later in the same field, since the input color signal -wjC from the memo +7203-III is of the sequential type. You can do it by interpolating, or by interpolating with the same color symbol of the line one field before or one field after (or one frame before or after). Here, an explanation will be given of the operation when performing supplementary darkening using the chromaticity signal of the line one field before the reminiscence. In the upper MPI C interpolation Igl path 212, the memory 203-
Chromaticity No. 18 C (fifth worst d) from 1ll is delayed by one field by a field delay j& circuit constituted by a memory that stores chromaticity information for at least one field. The 51st output from the stiff field delay circuit
Shown below. The output No. 48 C (d in Fig. 5) from the upstream thread 205-out is the line L1?'Q shown by the solid line in Fig. 2 (ill).
In contrast to the chromaticity Im shown by the Q mark of tLSt..., the output 1g from the field delay circuit C'
(e in Diagram 5) is the X H of the leg 2 diagram (1 field wound indicated by the broken line L;
It is indicated by J and contains information for one chromaticity. The above two chromaticities 1H and C
The chromaticity signals C'α and chromaticity signals C'α are alternately traced and extracted for each pixel with a period of 2τ, and a combined chromaticity signal C′α is output as shown in FIG. 5F. Specifically, the length is
Chromaticity of line Lll Ll1 "51...48 cm C'
1, line L',, LQ, 1 field before...
・The chromaticity of the similar color (g "t C'+ is interpolated, and the color of the line L1.L31 LSI...
1 + '33? "!Ll +... is output. Yota, Rano "L2.L4.L61...'s chromaticity Ig No. C;, the line 1 field before, LtlL4T
L≦,... similar color U ・ig - to 'f C''
t is Neyami 3n, te, line L2. L1. L0. ...A Fi 1K Sweet C,,. C441G',,? ...is output in a closed format. Therefore, this output CaC (f) in Figure 5 is a chromaticity signal of the A sequential type, and since the pixels that are not recorded and transmitted are interpolated as described above, the occupied band is B, It is reconstructed exactly as y/2. The above output C゛α is historically this C thin width] rotation 212V iron,
As shown in y and h of Fig. 5, two (iJ ′@C'
It is divided into α, and C′. -10,000 f8gCaI (The glue in Figure 5 is the above A11N 1111st order chromaticity 5 ηCα
(From f in Figure 5), the line "It L3.L5...
・By extracting the chromaticity 1K consideration C-□1"331 et al. 5.... and outputting 2 colors f7 continuously, the lines L, L4.L,... The chromaticity signal of 1 line before it (ET consideration'11 j Cis
+ '65? ···in? It can be obtained by doing between IIi and 1. Similarly, the other signal CtH (h in Figure 5) is the chromaticity signal "' of the line L21 L4T Ll'M... !2 ? Q41 By extracting C'-111?... and adding (supporting) two lines, Kanhyakucho can convert the chromaticity signal of line "IIL31" 51... to that Chromaticity signal 1 line before '2? j tA41
It is obtained by interpolating with t'e61... Thus, #l above! The sequential chromaticity is converted into two simultaneous chromaticity signals CctI and C<z2, which are sent to the D/A f conversion circuits 222 and 223, respectively, and converted into analog signals. The above L whose band is restored by the above band expansion circuit 200
), the luminance Y' and the chromaticity signals Cα1 and Cα2, which are the outputs from the /A conversion circuits 221, 222, and 225, are processed by low-pass filters 21, 22, and 23 as appropriate.
After the 100% component is removed, these three signals are converted into a matrix 9 by the Tecoder 20, and the signals corresponding to the original three primary color signals are (l(), 1(G), and (jJ)). The respective primary color outputs are output to the output fans 2α, 2b, and 2c, respectively.The sample bookmarks CPY and CPC supplied to the A/D conversion circuits 201 and 202, respectively, are as follows:
They are generated in synchronization with the synchronization information included in the signals of channels 1 and 2 outputted from W&41 and W&42, respectively. Also, the above reading atc”p;, c
p≦, C-old is generated based on a stable internal standard a-tsk obtained from a crystal sericulture circuit, etc. (not shown). In the embodiment shown in FIG. 1, the line sequential chromaticity signal co of the band By/2 output from the circuit 104 is transferred to
2 shows the case in which pixels are thinned out by sampling with a sampling bookmark CRC with a period of 4τ (frequency h/4). If the horizontal scanning frequency III of number i is set to have an offset of / or spoon as shown in the following equation, where le is an integer, it is the same as the interpolation of pixels thinned out from the sequential chromaticity signal etc. There is little image quality deterioration in the field (row 5
Figure 6 shows the sampling pattern for line sequential chromaticity No. 13 C6 by sampling bookmark CRC expressed by equation 21. In the figure, line L1)
The pixel indicated by "O-th" in the line L31LS2... indicates the sampling pixel for one chromaticity signal CI of the sequential chromaticity signal Co, and the pixel indicated by a mark in the line Ltl Li2 Let... is the other one. The sampled pixels for the chromaticity No. 100 are shown. As is clear from FIG. 6, the sampling phase of the sampling bookmark CIt C given by the above equation (21) is in phase at a period of 4 lines and aligned in the horizontal direction.
In the 2-line period, the eccentric phase is reversed and II! ! i Tsumugi will be culled. On the other hand, since the chromaticity signal Q is based on the Iwaj-visual formula, similar color signals (C1 to C1) are searched for in two-line cycles, so as shown in FIG. For the sampled pixel α of I am drawn to it. PI For the sampling pixels of the chromaticity signals of line L2, 2
The pixel b', which includes the line L after the line and the signals of the thread color and has the same phase as the above-mentioned pixel on the line L2, is not sampled but is thinned out. The pixel α' (or b') thinned out in this way is located close to each other in the same field and has the same color and phase (recording is captured by umα (or b). In this way, pixel interpolation is performed on the 1g of 4u of similar color that are temporally and spatially close, and therefore the image $It
It is important to minimize the deterioration of the price per purchase due to JJ discounts. Although the above example shows a case where pixel interpolation is performed on a chromaticity signal, the present invention is not limited to this. 1. The filters 12 and 15 further filter one or both of the two chromaticity signals C, , C, (1) from the circuit 10 using the filters 12 and 15. (For example, B y/4
Even if the above-mentioned gap pixel interpolation is not performed by limiting the g range, it is still possible to put it into practical use. An example of this is shown in Figure 7. In the same figure, α indicates the luminance 1g Y1 recorded as channel 101g, and b indicates channel 2. A luminance signal Y2', a #!sequential chromaticity signal C'I'1, etc., which are recorded as signals are shown. Two chromaticity values "j Cart C" from the circuit 10 described above are shown.
One of the filters, Co1, has a band By/by the filter 12.
8, and is compressed by the circuit 100 to the time axis, so that the chromaticity of the occupied band By/2 is 1! 9jC,'
(C'l' in Figure 7). The other chromaticity signal Cot is filtered in the same band B as above by the filter 13.
F/2, the pixels are thinned out in the same way as described in the above circuit 100, and the time axis is further compressed to the chromaticity value -wj of the occupied band By/2 (see Fig. 7). C1). As a result, line sequential chromaticity 1
M number q′. q can be recorded in (57,) kl every two lines, and compared to the original embodiment shown in FIG. A redundancy period of (/2)H can be obtained per /, and an extra luminance information II& can be recorded in this redundancy period. For example, as shown in FIG. can be recorded as a signal containing more luminance information in the same band B, /2 as described above. As mentioned above, the present invention provides Nobutsuke Hozuka's t4 to be recorded.
Divide the counter information into 4 pixel groups and 4 pixel groups, and then divide the counter information into 4 pixel groups and 4 pixel groups. The pixel groups are recorded individually in the second channel, and the number of pixel groups is arbitrary. In Fig. 2 (1) above, the pixels marked with ○ are recorded in the first channel as /l self-element group, and the pixels marked with X are recorded as /4Iiki element group! This is an actual example of recording on two channels. Another embodiment according to the gist of the present invention described above is shown in FIG. Y@8. In this figure 8 (11 and til1), the brightness M is considered Y.
The sampling pattern for
The pixels marked with an "X" are recorded in the first channel as @plain, and the pixels marked with an "X" are recorded in the second channel in a time-sharing manner together with chromaticity information (not shown) as a group of four pixels. IHJ In the diagram, all sampled pixels are extracted from lines LI, Ls, Ls, and channel 117)
1ff9, and line L2. L41 L6j・
...from c trap book version /21. r: An example is shown in which the signal is extracted and recorded as a channel 2 signal. Ti
ll is an example in which all pixels are extracted equally from each line.Among the sampled pixels of each line, every other pixel is thinned out and the pixels marked with ○ are used for channel 1.
Record it as 100 directions, thin out every third unit that is different from this, and extract the one marked with an ×) Channel 20
An example of recording as a signal will be shown. Incidentally, in both the examples shown in Figures 3 and 7 above, the -10,000 channel (channel 1) contains the number of issues per Iuki surface (one field or one frame) extracted from the original video information. The first luminance 1-Pt right (that is, the luminance information corresponding to the pixel of the ○ eye J shown in (1) in Fig. 2 above and (11 and [axis] in Fig. 8 above) Y, record the bamboo shoots, and the other channel (channel 2) -1 Harabo 1
The remaining 11 pieces of eternal information! The second bright fury in the north per page l11 (*llI i', f4 corresponding to the pixel marked X shown in the old figure 2 above and (1) and till in the above figure 8)
Although the case of time-division multiplexing and ML recording of chromaticity information C8r C'2 of Y2 and 2 Keyaki was shown, the present invention
, but not limited to each of the above channels (
In the above embodiment, the s-degree customary information Y1 and 4 of the two poles m and the chromaticity information q and 61 of the two buildings are set so that the occupied bands of the signals are almost equal to each other (two channels in the above embodiment). Even if it is recorded in a mixed manner, it does not deviate from the gist of the present invention.An example thereof is shown in FIG.
The operation will be explained using the waveform diagram shown in FIG. In Figure 10, α is the original F image 1g containing the above luminance information (Y+ + j't)
V for 4 line period (line Ls* Let Lss L
FIG. 4 is a waveform chart shown over the 4H period of 4. This original condition 1! l! GJ gV is processed by the band compression circuit 100' shown in FIG.
The image source 9 is divided into two parts (C in FIG. 10). In Figure 9? The band compression circuit 100' has most of the same features as the band compression circuit 100 shown in FIG.
It is the same as the figure, and detailed explanation will be omitted. In this band compression circuit 100', the above luminance information Y1 is written in ``■'' of the memo January 03, and the above luminance information Y1 is written in ``■'' of the memory 103.
, are written in the memo 103, and the above-mentioned chromaticity information C1 is written in the memo 103 as mil [the same as in FIG. Period T. (T shown in FIG. 10) is different from FIG. 1 in that it is performed cyclically in units of four lines. In the embodiment of FIG. 10, the luminance signal Y is sampled based on the sampling pattern A (shown at 111 in FIG. 8) and written to I and ■ of the memory 103. The luminance signal Y from the filter 11 in the figure is
A/D conversion circuit 1 of the band compression circuit 100' shown in FIG. 9 above.
01 and is converted into a digital signal, the output of which is alternately written to I and ■ of the memory 103 line by line. Odd numbered line LttLs shown in il+ in FIG. 8 above
tL5 tL? For l..., the sampling pixels indicated by O (corresponding to B effective pixels per field in the effective part of the original video information as shown in 1σ) are transferred to ■ in the memory 103 at the frequency. It is written sequentially by the honor clock. Also, the even numbered line 'Q I L4?
L6. For L, , . . ., the sampled pixels indicated by
: Sequentially folded by the write clock of fs/2. Outputs 4 from filters 12 and 13 in FIG.
, 6 chromaticity signals C1 and C, f, switching circuit 104 in FIG.
The line-sequential chromaticity signal gcovc is converted, and the output Q is converted into a digital signal by the ω conversion circuit 102, and then converted into a digital signal of Lak/4 in Memo 1J103.
, 1 is set sequentially for each line. Next, the luminance information @IY1 of the odd-numbered line Lll 'Qt Let LYI... written to I of the memory 17105 is sequentially read by the vr and clock of the cycle rHL number h/2, Therefore, the time axis is divided into two lines, and the period of one line is output as T, and the period of one line is M of (=2M). The output from the memory 103 is alternately divided into two signals line by line by a dividing circuit 111 and outputted to terminals 1 and 2, respectively. Therefore, from the terminal 1, the period T is 5[, 4 lines, as shown in FIG. 10b. (=27-=4 horns), line "HL"
The luminance information Y is output in the order of etL, . . .
A time gap of (9-8) is created between each line. Similarly, from the above yli1 child 2, 4
After the period of the line, the line Lm t L? j Ll
70'U anti-information Y is output at l, . . . 01111, similarly creating a time gap of (To I'l) between each line. In the time space 'g (1'o-1-) between the above lines formed by the outputs of the odd-numbered lines above, the boost convolved with ■ and ■ of the above memo IJ1115 is time-divided. The m extraction of the signals from these (1) and (2) is controlled so that the signals are output as shown in FIG. That is, the even fffth line Lt2 L41 L6 . written to H of the upper 8C memory 103. The above luminance information 4 of Ll1)... is acquired sequentially by a clock with a frequency of ft/2, and therefore its time axis is not compressed and is output as a signal of one line period or T, C=IH). be done. The output from this memory 103 is from the upper C division circuit 1.
At step 11, the signal is divided into two <g-ry on pomelo lines line by line, and is output from the terminals 1 and 2 in a time-division manner following the output of the bright KM signal Y, respectively. In addition, the memory 1
If the above chromaticity information q of the line-sequential type entered in 1 of 05 is taken sequentially by the clock of frequency fI/2, the time axis is moved to A, and the period of one line is is T, C=DingH) signal ((,'2) and T4C=-H
H) signal (C2) is output line-sequentially. The output from the memory 103 is divided into two by the dividing circuit 111.
It is divided into two signal numbers alternately in line units, and the signal from the terminals 1 and 2 is connected to the output of signal 4.
It dies and is output in time division. (Then, from terminals 1 and 2 of the dividing port wr111,
As shown in FIG. 10b and C, the period of one line is the luminance information 4 and T of the stone, and the luminance information 4 and 1°, respectively.
, the above chromaticity information @1q and the above chromaticity information C1 or time g
11 times and is output with a Yasumoto period of 1 - (= 7', lower + l°. + 1', ). The output from Miko 1 is converted into an analog signal by the D//1 conversion circuit 121 and output as signal g4 of channel 1, and this output V1 is the above! The signal is supplied to the recording processing circuit 51 shown in FIG. Similarly, the output from the terminal 2 is the D/A i conversion circuit 12.
The signal is converted into a 2V Anamig signal and outputted as a signal 4 of channel 2, and this output 4 is supplied to the recorded video processing circuit 52Vc shown in Fig. EA1 above. The above two outputs V1 and 〆 both have an occupied band of Bl/
Needless to say, it is 2. In addition, the above communication-n V
, 4 As the channel 1 signal, the channel 1 track (To t At s T + *
t...), and the above signal J/'! The channel 2 track (Tts t
"vt t I'tx t...)", but
When the recording position is viewed in the direction perpendicular to the longitudinal direction of each track, 141) the base of the signal plate and V between the racks
This cycle f. The timing of outputting the above-mentioned V2 and V2 is controlled by the dividing circuit 111 shown in FIG. 9 so that they are aligned with each other. FIG. 11 shows an example of an actual IM of a track pattern recorded and formed based on the above method in connection with the present invention. As mentioned above, 12) Since the impulses 4 and V2 of each channel between I-contact tracks are aligned in the longitudinal direction of the track and the vertical direction according to their fundamental period, tracking errors may occur during playback and may cause adjacent Even if a stalk occurs from a track, its crosstalk has a very strong correlation with the reproduced signal from its own track. - Since the Kuiba signal also has the same Y1 component with a strong correlation, the interference caused by the above a-stoke (g signal) becomes zero-beat, and the effect of visually reducing the disturbance can be obtained. The sampled pixels shown in Figures 6 and 8 all indicate valid pixels during the effective period of video information excluding the vertical blanking period and the horizontal blanking period. It goes without saying that the scope of the present invention also falls within the scope of the present invention when the sampled pixels of the blanking period are recorded in proportion to each channel along with the above-mentioned effective pixels. 4th period 1'+Y @ (vertical period 1' and horizontal synchronous 1
If you want to record arbitrary information such as 100 numbers, how many cycle lines are sent by a specified number of laps, etc.),
The present invention also falls within the scope of the present invention, where new blanking information 'ft is formed and recorded by changing the time division by 4 to the above video information, and in any of these cases, it is advantageous. In addition, if all or part of the vertical blanking period and horizontal blanking period are deleted and recorded, the time space IM generated by MIJ division of the blanking period can be reduced. '?: Na(As shown above, the time axis of the two unique luminance information Y1 and 4 and the chromaticity information C'' and q of the above 24!1md can be expanded and recorded, and therefore, the time axis Depending on the extension, the occupied band of the recording number 1 can be further sandwiched, and the effect of making it possible to change the SLN ratio of the Shozumi erasure sound or to perform a moxibustion time group of 1 on the knee is 1 (tone). The waveform diagrams in Figures 3, 9, 145, 7, 10, and 11 above only show the rating plate and the color code. Blanking such as blanching and horizontal blanking 1# Tsuzuri'P OLD+! Synchronization with synchronous and horizontal frA etc. 7 Arashi is omitted 1-, but the present invention is included in accordance with the above gist. In addition, as mentioned above, if all or part of the blanking period and the horizontal graphing are deleted and recorded, the blanking period is Because the time axis is expanded for each line, the period of one line shown in Figs. figure,
The same applies to Figure 11. [Effects of the Invention] As described above, according to the invention, it is possible to compress the bandwidth of a broadband signal (1 uranium g) with less negative coding, and moreover, the occupied area of 4 yi can be increased to 4, etc. Since recording is performed by dividing into at least 2 channels, the recording FDG band per channel can be efficiently recorded without too much or too little, and can be recorded directly on a magnetic recording medium such as a VTR. In this case, since a small drum is used to record and play back broadband signals, the device can be made smaller and lighter, and the number of channels used can be reduced (because it is possible to reduce the circuit size). It is possible to reduce the size of the equipment and reduce the cost of the equipment.
Benefits include the ability to record time on a small cassette.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a valence recording and reproducing apparatus showing an embodiment of the present invention, FIG. 2 is a sampling pattern diagram according to the present invention, FIG. 3 is an arrangement diagram showing an example of recording decoding modification, and FIG. 4
The figure is a tape track pattern diagram, Figure 5 is an arrangement diagram showing each S waveform in Figure 1, Figure 6 is a diagram showing other examples of sampling patterns, and Figure 7 is another example of the recording signal waveform. FIG. 8 is an arrangement diagram showing another example of the sampling pattern, FIG. 9 is a diagram showing another example of the band and f-line circuit according to the present invention, and FIG. Each Nrt
The JjL shape diagram and FIG. 11 are arrangement diagrams showing other embodiments of the track pattern. 100...band compression circuit 104...switching circuit 1
05... Memory 110... Data switching circuit 101.102, 201, 202... Le Φ conversion circuit 121.122, 221.222, 225... D/
A degree conversion circuit 200...Band extension circuit 211...
Y interpolation circuit 212...C interpolation circuit agent patent attorney - z 9 Figure ヱ 10 Concave OYl C Otsu 1) Yl- (Shinko 1 (L1) (l impossible Y+< Lri) \/-
Part 2

Claims (1)

[Claims] 1. Luminance information (Y) and two chromaticity information (C_1, C_2
) is a device that divides a video signal including a plurality of channels into a plurality of channels and records and reproduces the video signal, the device sequentially samples the luminance information (Y) and generates the first luminance information (Y).
Y_1) and narrow band second luminance information (Y_2) with a smaller number of pixels;
means for converting the first luminance information (Y_
1), the second luminance information (Y_2), and the line-sequential chromaticity information (C_0) output from the conversion means are divided into the plurality of channels in proportion so that the signal occupied bands are approximately equal to each other. A video signal recording and reproducing device comprising: means for recording and reproducing video signals; 2. The separation means sequentially samples at least an effective part of the luminance information (Y) and extracts 1/2 of the effective sampled pixels per screen as the first luminance information (Y_1). 2. The video signal recording and reproducing apparatus according to claim 1, further comprising means for extracting 1/2 or less of the remaining sampled pixels as the second luminance information (Y_2). 3. The separation means includes means for sequentially sampling at least an effective part of the luminance information (Y), and odd-numbered and even-numbered effective sampling pixels per screen output from the sampling means. In the second line, 1/2 of the sampled pixels is extracted as the first luminance information (Y_1), and in either the odd or even line, the first luminance information is extracted as the first luminance information (Y_1).
Claim 1, further comprising means for extracting all or part of the remaining sampled pixels different from those assigned to the luminance information (Y_1) as the second luminance information (Y_2). video signal recording and reproducing device. 4. The separation means includes means for sequentially sampling at least an effective part of the luminance information (Y), and an odd number (or In the even (or odd) line, all of the sampled pixels are extracted as the first luminance information (Y_1), and in the even (or odd) line, 1/2 of the sampled pixels is extracted as the first luminance information (Y_1).
2. The video signal recording and reproducing apparatus according to claim 1, further comprising means for extracting the second luminance information (Y_2). 5. The separating means includes means for sequentially sampling at least an effective part of the luminance information (Y), and a means for sequentially sampling at least an effective part of the luminance information (Y), and a means for sequentially sampling at least an effective part of the luminance information (Y), and a means for sequentially sampling at least an effective part of the luminance information (Y), and a means for sequentially sampling at least an effective part of the luminance information (Y), As luminance information (Y_1), every other sampling pixel of each line is thinned out and extracted, and as the second luminance information (Y_2), the first luminance information (Y_
2. The video signal recording and reproducing apparatus according to claim 1, further comprising means for thinning out and extracting every third or more remaining sampling pixels different from those assigned to 1). 6. The apportioning means includes a means for time-division multiplexing the first luminance information (Y_1) line by line and recording it on one channel, and a means for recording the second luminance information (Y_2) and the line sequential chromaticity. 2. The video signal recording and reproducing apparatus according to claim 1, further comprising means for time-division multiplexing the information (C_0) line by line and recording the same on the other channel. 7. The apportioning means divides one line of the first luminance information (Y_1), one line of the second luminance information (Y_2), and two lines of the line sequential chromaticity information (C_0). 4
2. The video signal recording and reproducing apparatus according to claim 1, further comprising means for time-division multiplexing lines and alternately dividing and recording the lines into a plurality of channels in units of four lines. 8. The exchange means sets the horizontal scanning frequency of the video signal to f_H, where n is an arbitrary positive integer, and (n+1/4)×f_
The above two chromaticity information (C_
1. The video signal recording and reproducing apparatus according to claim 1, further comprising means for sequentially sampling the video signals (1, C_2).