DE3107870A1 - Recording format suitable for a cue review and arrangements for recording and replaying this format - Google Patents

Abstract

In a recording and replay system for colour images, the colour image quality for replay in cue review is improved by the video signal for each frame or field, scanned at a predetermined multiple of the colour subcarrier frequency, is recorded divided over a number of tracks, only some of the recorded information being selected for reconstruction of the image to be replayed in cue review mode. In detail, only pixel groups which in each case correspond to a whole colour subcarrier period (1-4, 5-8, 9-12 etc) are recorded on the tracks (1, 2 or 3) in such a manner that a video signal can be easily reconstructed from these with the correct colour information during the cue review mode. In a preferred embodiment, successive pixel groups are recorded on separate tracks, the pixel groups which are to be replayed during the cue review mode all being placed on a single track. Thus, these pixel groups on the single track can be in each case repeated several times in order to obtain instantaneous coherent information for reconstructing the cue review image. <IMAGE>

Description

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ECA 74 242 Ks / egg

Brit.Appln No: 8007163

Piled: March 5, 1980

Brit. Appln No: 8007669

Piled: Maren 6, 1980

U.S. Serial No: 163.150

Piled: June 26, 1980

ECA Corporation New Tork, N.Y., V.St.v.A.

Recording format suitable for a picture search and arrangements for recording and playing back this format

The invention relates to a recording and reproducing system for television signals using the interrogation or digital method works and in which ^ each television frame or field is recorded on a group of multiple tape tracks. During the scrolling or "hoviola" operation of such a system the recording medium is played back at a very high tape speed, with only one! part of the for many frames or partial pictures recorded a color television signal of reduced quality for one frame or field is reconstructed. While it is possible to use conventional methods (which will be explained below) also in the case of the one mentioned above Apply system for performing the picture search operation, however, the reproduced image becomes very much poor quality.

The object of the invention is to improve the image quality in the

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Search operations in a recording and reproducing system of the above-mentioned genus. This task is achieved according to the invention by features as specified in the claims.

In accordance with the principles of the invention, only whole color subcarrier periods are used recorded on the tracks in the recording and reproducing system, so that a video signal with flawless Color information can be reconstructed. According to a preferred Embodiment are groups of Bildpuiakten, the successive Sub-carrier periods are assigned, recorded on separate tape tracks in the multi-part tape track group, where those groups of pixels that make up the seconstruction of the video signal during the search operation are recorded on a single track and in a sequence repeated several times in order to obtain a filling information for the other tracks to gain. Contains a suitable arrangement for recording a color television signal according to this principle a buffer memory for each track and a multiplexer, over which groups of picture elements, the whole subcarrier periods are assigned to the buffers one after the other. During each cycle the multiplexer will then pixel information is stored in the buffer stores and simultaneously to the tracks at the end of each multiplexer cycle read out. A suitable arrangement for displaying a search picture igaals according to the invention contains a converter in order to convert groups of pixels assigned to the subcarrier periods to be provided individually from a single track in parallel form, so that each pixel is available at a separate output. A multiplexer to which the output variables of the converter are applied, cycles through its cycle repeatedly to output each search pixel group as many times as Tracks are present in the multi-part track group, so that coherent information is immediately available during the search operation is delivered.

The invention is illustrated below using exemplary embodiments

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explained in more detail by drawings.

Pig. 1 illustrates the general principle of the invention for a single scan line of the box recorded in three tape tracks;

Pig. Figure 2 illustrates a playback technique for reconstruction the Easter line after Pig. 1 from a single track during search mode;

Pig. 3 shows a device with which tape formats are recorded in a recording system according to the invention can;

Pig. Fig. 4 shows a device with which tape formats in the recording system according to the invention can be played;

Pig. 5 shows an embodiment of the invention in which comparable Parb subcarrier periods from each line are recorded in a grid in the same order on the tracks will;

Pig. Fig. 6 shows an arrangement of the format selector in Pig. 3 for that Pig tape format. 5;

Pig. 7 shows the vertical alignment of grid segments that is obtained when the raster lines after Pig. 3 using the method described in Pig. 2 is played will;

Pig. 8 shows another embodiment of the invention, wherein comparable subcarrier periods of adjacent lines of a grid on the tracks in a different order to be recorded;

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FIG. 9 shows another arrangement of the format selector in FIG. 3 for the tape format of Fig. 8;

Fig. 10 shows the diagonal alignment of Easter segments that is obtained when another playback method is used to reconstruct the raster lines of FIG.

In the case of recording and recording systems that use query or digital technology Playback systems for color television, in which each frame or frame of the television grid is on a group of several tracks is recorded, the very high speed of the recording medium during the picture search or JMoviola mode requires that a video signal from only part of the recorded Information is reconstructed. In some systems of the type mentioned, the video signal to be recorded is digitized, by using some goal a certain multiple of its color subcarrier frequency is queried. In such systems, known methods can be used to reproduce the information to be searched for Play information from only a single track while the recording medium is at the increased speed emotional. For example, you can record the track selected for the search using a head that positions you at an azimuth angle standing gap, and play it with a corresponding but oversized head. Since the search image is made from only a part of the recorded information is obtained, is in recording and playback systems of the type mentioned in the Search mode only allows an image of reduced quality. The raster that is being searched also contains additions of many recorded frames or fields, because the speed of the recording medium during the Picture search differs from that during recording. In the recording and playback system according to the invention, however, the picture quality in the search mode is much better than that here only groups of query values (image point groups) belonging to entire color subcarrier periods are assigned to the individual Recorded tracks that then make up a video signal

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can be easily reconstructed with perfect color information, by converting a part of these to whole color subcarrier periods in the Suehlaufbetrieb corresponding pixel groups.

As will be explained further below, one can easily use conventional digital circuits to create format-forming devices which only contain whole groups of pixels Direct color subcarrier periods to the tracks when recording or remove it from the tracks when playing. Since the search mode is usually found in devices that both record and can also play, format-forming devices for both recording and playback in Connection with a recording and playback device described. It certainly needs no further explanation that the recording and Playback functions can also be perceived by separate and different subsystems, in which one subsystem a format-forming device according to the invention for recording and in the other subsystem one according to the invention format-forming means for playback is present and wherein a tape recording format according to the invention by means of of one subsystem is recorded and played back by means of the other subsystem.

A preferred "tape format" (i.e., the manner in which the recorded information is placed on the multi-track tape) used in can be used with the recording and playback system according to the invention is illustrated in FIG. With this format are groups of pixels that belong to successive color subcarrier periods of a single saster line, on different ones Recorded tracks of the multi-part track group of the tape. In the case shown, during each color subcarrier period four signal samples (pixels) are taken, and the multi-part tape track group contains three tracks. But this is what it is just to give an example for purposes of explanation. The first four pixels represented by thick black dots belong to the first color subcarrier period and become on

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recorded on track 1; the second four pixels that represented by black triangles belong to the second color subcarrier period and are recorded on track 2; the third four pixels, represented by black rectangles, belong to the third color subcarrier period and are recorded on track 3. This distribution format repeats itself for each series of three color sub-carrier periods, "until the complete baster line is recorded. During When playing in the picture search mode, the video signal for this Easter line is made up of only a part of the recorded groups of pixels constructed, e.g. from groups of pixels, only one of the three tracks, as will be explained in more detail below. However, the chrominance information is retained because this eeconstruction is carried out with whole color subcarrier periods the resulting image quality is better than that with conventional Quality achievable with recording systems.

Even without further explanation, it can be seen that the individual Color subcarrier periods associated with pixel groups in all East parts of each partial image or full image in the recording and playback system according to the invention are recorded. It should also be mentioned that the order of the tracks in which the successive groups of pixels are recorded is not limited to the order illustrated in FIG. 1. In reality, the tracks can also come into line in another episode in order to achieve better results for the picture search mode, as will be discussed further below is explained.

When a normal video signal is reconstructed for the Easter line shown in Figure 1, all of them are recorded Groups of pixels played in the order in which they were recorded from the tracks of the multi-part track group. During the picture search operation however, the video signal for the Easter line must be restored from only a part of the recorded groups of pixels being, of each of these groups of pixels

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instantly coherent information for reproduction as a Part of the basters shown in the search run is derived. Although the part of the pixel groups to be displayed during the search could also be scattered over all tracks of the track group (this case is also within the range of Invention), in an advantageous embodiment of the tape format, these groups of pixels are on a single "search" track of the track group is recorded, for example, in track 1 in the tape format shown in FIG. Then the moment will coherent information for the representation of a section of the search easter obtained by the fact that each search pixel group Repeat as many sharks as the number of tracks in the track group. If you have this playback technology are used, for example, those relating to the first and of the fourth color subcarrier period in the Easter line of the figure taken three times in a row, as Fig. 2 illustrates. Of course, any number Z can be used in the recording and playback system according to the invention of tracks in the multi-part track group and any number Γ of pixels for each color subcarrier period be taken. In general it then applies that every group of Y image points, that of a color subcarrier period in the search track is repeated Σ times.

A preferred format forming device which, when recording only pixel groups of entire subcarrier periods the individual Assigning tracks is shown in FIG. The successive, pixel groups belonging to whole color subcarrier periods for each frame or field of the video signal are allocated to the tracks via individual buffer memories 10, with such a memory belongs to each track of the track group. A multiplexer 12 is switched on cyclically by one pixel clock as a writing cycle and the individual groups of pixels one after the other to be given to each buffer memory 10, the sequence of allocation being determined by a format selection device 14 which controls the multiplexer 12 and the order of

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Entry of the successive groups of pixels into the buffer memory 10 ". The pixel groups assigned to the individual color subcarrier periods are determined during each cycle of the Multiplexer 12 is stored in the buffer memory 10 and read out simultaneously to the tracks at the end of each multiplexer cycle, if the pixel clock via a frequency divider 16, the divides the clock frequency by a number corresponding to the number of tracks in the track group when the reading clock is applied. The horizontal synchronization signal and the pixel clock are used to control the format selection device 14. The den pixel groups assigned to individual color subcarrier periods can be processed as digital words in serial form or parallel form by the means forming the recording format will. If digital words are used in parallel, then the output of each buffer memory 10 is a parallel-to-serial converter 18 downstream.

During normal reconstruction of a video signal from the different tracks of the track group, all of the tracks are recorded pixel groups by a playback formatter processed, which is constructed in a similar manner, but in reverse viewing as that described above Record formatter. Such a playback formatter ^ is used as © the entire color subcarrier periods assigned pixel groups from the tracks via serial-parallel converters to a parallel arrangement of Enter buffer memories and from the buffer memories via a multiplexer, which is under the higher-level control of a format selection device is to deliver to the reproduction attitude. During the construction of a video signal for the picture search operation however, the type of display formatter depends on how the pixel groups assigned to this operation are distributed in the various recording tracks. In addition, each must be played for the search mode Immediately derived image point group coherent information will. Therefore, a recording and playback system

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that such information with the above "described, the Search pixel groups repeating method, a playback formatting device and a repeater device contain in order to retrieve the search pixel groups from the Trace group to decrease and any such focus group during repeat playback.

When the video signal is in the picture search mode according to the above in 2 is taken from a single track, then such a device for playback formatting and repetitions have the structure shown in FIG. In this arrangement a converter 20 is provided, of each search picture group from the search track in parallel form, each pixel being made available at a separate output. A multiplexer 24, to which the output signals of the converter 20 are applied, is repeatedly incremented for each search pixel group as many times in succession as there are tracks in the track group. Depending on the desired image display format can output the multiplexer 24 directly are passed to the playback circuit, as will be explained in more detail below. The converter 20 is given a track pixel clock applied to the pixel groups one after the other to funnel the converter. The same beat will also give you a Frequency multiplier 28 supplied to the clock frequency with a number corresponding to the number of tracks in the track group multiplied. This multiplied clock frequency is then divided by a number in a downstream reducing counter 30, which is equal to the number of pixels in each pixel group for a color subcarrier period. The output signal of the reducing counter 30 controls the multiplexer 24.

In Fig. 5 is a special "tape format" for the inventive Recording and playback system shown in which corresponding groups of pixels from each scan line of an easter in the same order on the tracks of the

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Track group can be recorded. For the purpose of explanation, so only as an example, here is the number of pixels in each group coming to one color subcarrier period and the number of tracks in the track group is chosen exactly as for the single Easter line in the recording type according to FIG. 2. Those falling in the first color subcarrier period of each Easter line Image points 1-4 are therefore drawn on track 1, those assigned to the second color subcarrier period in each Easter line Image points 5-8 are drawn on track 2, the image points assigned to the third color subcarrier period in each Easter line 9-12 are drawn on track 3, the pixels coming to the fourth color subcarrier period in each Easter line 13-16 are again drawn on track 1; the fifth Image points 17-20 belonging to the color subcarrier period in each Easter line are drawn again on track 2; the sixth Color subcarrier period in each Easter line 21-24 are drawn again on track 3, and so on, until the pixel groups assigned to the individual color subcarrier periods are recorded in all Easter lines. Thus the track contains 1 the pixel groups 1-4-, 13-16, etc. of line 1 in the same Order like the corresponding groups of pixels for lines 2, 3, etc.

The record formatter or device for formatting and for repetition during playback, which are shown in Fig. 3 and in Fig. 4, respectively, can be used in conjunction can be used with the tape format of FIG. Then, as shown in Fig. 6, the format selector 13 is in the array 3, a reducing counter 32 and a frequency divider 34 included. The counter 32 is set to a number which is equal to the number of tracks in the track group, and its output signal is applied to the multiplexer in the arrangement of FIG. 3 as a control signal. The frequency divider 34 divides the pixel clock frequency by the number of pixels in each pixel group and its output becomes the counting input of the reducing counter 32 is applied. Of the

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Eüekstelleingang the counter 32 receives the horizontal sync signal. The output signal of the counter 32 in Pig * 6 thus switches the multiplexer 12 in FIG. 3 always after a series of Pixel clock pulses, the duration of which is the same as the duration of a pixel group, continue to a new buffer memory, and resets the multiplexer 12 to the first buffer memory after each horizontal sync pulse. As described above, reconstructs the formatting repeater shown in FIG the search video signal from groups of pixels a single track. These groups of pixels are in their individual Pixels at the outputs of the converters 20 are divided and then repeated by the multiplexer 24 for the purpose of reproduction, in that this hultiplexer is switched so often cyclically by the reducing counter 30 for each pixel group, how there are tracks in the track group. Assume that track 1 of the tape format is the Pig. 5 for such search playback is used. In this case, a video signal for a full-color picture from the pixel groups 1-4, 13-16, etc. in {Each Easter line is reconstructed as the playback format in Fig. 7 shows, each pixel group three times is taken one after the other in order to obtain the currently coherent information for the display of a part of the search screen to deliver. However, since groups of pixels that belong to each other corresponding color subcarrier periods in each Easter line, on the same tracks of the tape format of Fig. 5 are recorded, are corresponding image sections formed by repeating the Search pixel groups are generated in a vertical Pattern aligned with each other. Although the resulting search image is of better quality as mentioned above, this is a limitation vertical patterns this quality due to the reduced horizontal resolution, which leads to color streaking.

The aforementioned vertical pattern can be avoided by opting for the recording and playback system according to the invention another tape format is used in which the pixel groups for corresponding color subcarrier periods in adjacent

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Easter lines recorded on separate tracks of the track group are as shown in FIG. For the purpose of explanation, so only as an example, here the number of pixels is in each group falling on a color subcarrier period and the The number of tracks in the track group is selected in exactly the same way as for the individual Easter line in the recording format according to FIG. 1. In detail, Easter line 1 with its pixel groups 1-4, 13-16, etc. is recorded on track 1; their pixel groups 5-8, 17-20, etc. are recorded on track 2, and their pixel groups 9-12, 21-24, etc. are on the track recorded. For Easter line 2, the pixel groups 5-8, 17-20, etc. to track 1, the pixel groups 1-4, 13-16, etc. to track 2 and the pixel groups 9-12, 21-24, etc. recorded on track 3. For the Easter parts 3, the Pixel groups 9-12, 21-24, etc. on track 7, the pixel groups 5-8, 17-20, etc. on track 2 and the pixel groups 1-4-, 13-16, etc. recorded on track 3. Corresponding to each other Pixel groups 1-4, for example, are thus for line 1 in track 1, for line 2 in track 2 and for the Line 3 recorded in track 3.

The tape format of Fig. 8 can be made using record formatting s device according to Fig. 3 can be realized, the format selection device 14 the multiplexer 12 via a read-only memory 36, as shown in FIG. 9. The read only memory 36 is through output signals of two reducing counters 38 and 40 controlled by its program, which is set up so that corresponding groups of pixels Adjacent Easter lines on separate tracks of the track group to be recorded. Each of the scaling down counters 38 and is set to a number equal to the number of tracks in the track group. The count input of the counter 40 and the The back-up input of the counter 39 is the horizontal synchronizing signal created. The counting input of the counter 38 receives the pixel clock signal via a frequency divider 39, which determines the frequency of this Divides the signal by a number equal to the number of image

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score is in each pixel group. As a result, the steers Multiplexer 12 in Pig. 3 with each pulse that the read-only memory 36 receives from counter 38 the bits for a complete Pixel group to a single buffer memory 10, and with each pulse that the pest value memory 36 receives from the counter 40 receives, the multiplexer 12 switches on. TJm the tape format according to Pig. 8, the switching sequence of the multiplexer is as follows: Buffer 1, 2, 3 »etc. for line 1; Buffer 2, 1, 3, etc. for line 2; Buffer memory 3j 2, 1, etc. for line 3 »and this pole is repeated "until all Easter lines are recorded.

The tape format according to Pig. 8 can be done with the help of the formatting and repeating device according to Pig. 4 can be played, with another multiplexer 42 is used to do the playback to offset each Easter line in relation to the neighboring raster lines and thereby obtain a display format that welehes has a diagonal pattern of repeating groups of pixels, which do not correspond to one another in adjacent lines. This pattern is in Pig. 10 shown. The multiplexer 42 has one single output and multiple inputs, the number of which is equal to that Number of tracks in the track group is. These entrances form a row from a first to a last entrance. Consecutive Inputs between the first and the last input are each connected via a delay line 44, whose Delay time is equal to the duration of one subcarrier period. The first input is the output signal of the multiplexer 24 created. The multiplexer 42 is controlled by the horizontal synchronization signal which is applied to it via a reducing counter 46 set to a number equal to the number of tracks in the track group. So when the multiplexer 42 on its first input, then repeated groups of pixels coming from the multiplexer 24 are displayed without delay let through. However, since the multiplexer 42 changes with each horizontal sync signal switches to the next input, the playback of the respective image groups provided is

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the switching delayed by an additional color subcarrier period.

The formatting and repeating device of Fig. 4 reproduces that is, the tape format shown in FIG. 8 in the reproduction format shown in FIG. 10, "in which the raster line 1 with three times repetition of the pixel group 1-4 to fill in the pixel positions 1-12, with three times Repetition of the pixel group 13-16 to fill in of the pixel positions 13-24, etc. is reproduced. The Easter line 2 is represented by a dummy picture - point group, which the pixel positions 1-4 · during a Fills the delay period, then repeats the pixel groups 5-8 three times to fill in the pixel positions 5-16, then triple repetition of the group of pixels 17-20 to fill in of the pixel positions 17-28, etc. The Easter line 3 is displayed with two dummy pixel groups, which fill in the pixel positions 1-8 during two delay periods, then by repeating the pixel group three times 9-12 to fill in the pixel positions 9-20, then triple Repetition of the pixel group 21-24 to fill in the pixel positions 21-32, etc. The Easter line 4 is in the same Displayed in the same way as Easter line 1, and this display format is repeated until the Easter or the television sub-picture is complete. Because of the usual conditions on Eand an easter the nature of the dummy pixel groups is unimportant, because many pixels both at the beginning and at the The end of each Easter line are not visible anyway. A typical Easter line can contain 910 pixels, of which only 768 points are visible. The image point groups for any one Easter line can be derived in various ways, e.g. the pixel groups at the end of the immediately Use the preceding Easter line for this, or you can simply leave the space created by the relocation empty. That diagonal patterns of groups of pixels which do not correspond to one another in the reproduction format according to FIG. 10 results for the search mode a picture of very decent quality. Of course are as

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Search! on display formats too, other diagonal patterns of groups of pixels not corresponding to one another are possible, which deliver images of better quality than the one described above Playback format according to Fig. 7? where the vertical pattern corresponding pixels are present.

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Claims (11)

DR. DIETER V. BEZOLD ^ 1 Γ 7 P 7 Π DIPL. ING. PETER SCHÜTZ * I U / Q / U DIPL. ING. WOLFGANG HEUSLER MARIA-THERESIA-STRASSE 22 POST BOX 86 06 68 D-8OOO MUENCHEN 86 TELEPHONE 089/47 69 06 ECA 74 249 Es / Ei 476819 FROM SEPT. 1980: 4 70 60 06 Brit.Appln No: 8007163 telex Filed: March 3, 1980 telegr Brit.appln No: 8007669 Piled: March 6, 1980 U.S. Serial No: 163,150 Filed: June 26, 1980 telegram ECA Corporation New York, N.T., V.St.v.A. For a picture search suitable on drawing format and arrangements for recording and playing back this format claims 1. Tape recording format "at which pixels of a color television signal s interrogated at a predetermined multiple of the color subcarrier frequency, in digital form are recorded so that each frame or field of the television signal is recorded on several tracks of the recording tape is distributed, with only part of the recorded information intended to be used in the reconstruction of the Color television signal played back during a search operation to be characterized by that the image points are only combined in groups belonging to whole color subcarrier periods (1-4, 5-8, 9-12, etc.) and are recorded in these groups on the tracks (1, 2 or 3) of the tape so that _ 2 - 13ÖÖ6 4/0620 APPROVED BY THE EUROPEAN PATENT OFFICE · PROFESSIONAL REPRESENTATIVES BEFORE THE EUROPEAN PATENT OFFICE POSTSCHECK MÖNCHEN NO. 6 91 48-800 BANK ACCOUNT HYPOBANK MÖNCHEN (BLZ 7OO 200 40) KTO. 60 60 25 73 78 SWIFT HYPO Df-MM During the picture search operation, a video signal with correct color information can be easily reconstructed from the tracks can. 2. Recording format according to claim 1, characterized in that successive groups of pixels on separate tracks recorded in the picture search mode groups of pixels to be reproduced are recorded on a single track (1), so that these groups of pixels in the Reconstruction of the video signal during the search operation can be repeated successively to get instantaneous coherence To provide information. 3. Recording format according to claim 2, characterized in that corresponding groups of pixels of each line of the image grid are in the same order on the track 'ren are recorded so that during the search operation each repeated sequence of a group of pixels from a raster line vertically aligned with the repeated sequences of corresponding groups of pixels from the other raster lines is. 4-, recording format according to claim 2, characterized in that that corresponding groups of pixels in adjacent lines of the image raster on separate tracks of the tape so are recorded that dummy pixels can be inserted during the search mode in order to reproduce the image of each grid line compared to the neighboring grid parts and thereby obtain a display format in which repeated sequences of one another do not correspond Groups of pixels in adjacent raster lines according to a diagonal patterns are aligned with each other. 5. A recording arrangement for the recording format according to claim 1, characterized by a formatting device, which only groups of pixels that form whole color subcarrier - 3 130064/0620 Periods include, "when recording on each track gives. 6. Aufzeiehnungsanordnung according to claim 5 »characterized in that that the record-forming device does the following contains: a buffer memory (10) for each track of the tape; a multiplexer (12) through which successively incoming groups of pixels are separated from the buffer memories be passed to store the pixel groups in the buffer memory during each cycle of the multiplexer and they at the end of each multi-cycle at the same time to read out the tracks; a format enabling device (14-), which the multiplexer controls to determine the order in which the successive groups of pixels are entered into the buffer memory. 7. Recording arrangement according to claim 6, characterized in that that the IOrmatwählinrichtung (14) the multiplexer (12) controls via a reducing counter (32; 38) to select corresponding groups of pixels from each line of the image grid to be recorded in the same order on the tracks of the tape, and that the reducing counter is set to a number corresponding to the number of tracks and the horizontal sync signal at its reset input receives and at its counting input a pixel clock signal via a frequency divider (34-; 39) receives the divides the clock frequency by a number equal to the number of pixels in each pixel group. 8. Recording arrangement according to claim 6, characterized in that that the format selection device (14 ·) controls the multiplexer (12) via a read-only memory (36) with the multiplexer sequence is programmed, which is necessary to 130064/0620 the corresponding pixel groups of adjacent lines of the To record image raster on separate tracks of the tape, and that the read-only memory (36) the horizontal synchronizing signal receives via a first reducing counter (40), which is set to a number equal to the number of tracks, and that the read-only memory also receives the output signal a second scaling counter (38) which is set to a number equal to the number of tracks and the horizontal sync signal at its Kückstelleingang and the pixel clock signal at its counting input via a frequency divider (39) which divides the frequency by a number which is equal to the Is the number of pixels of each pixel group. 9. Abspi el arrangement for the Aufzeichnuagsformat according to claim 1, characterized by a formatting and repeating device (20, 24, 28, 30) which during the picture search mode takes the groups of pixels selected for the search from the tracks of the tape and each of these groups of pixels repeated several times to provide instantaneous coherent information. 10. Playback arrangement according to claim 9 for the case that the recording format Contains successive groups of pixels separated tracks of the tape, with each other corresponding Groups of pixels from each line of the image grid are recorded in the same order on the tracks of the tape, characterized in that that the formatting and repeating means only the groups of pixels recorded on a single track processed for the search mode and contains the following: a converter (20) to convert the groups of pixels selected for search playback from the individual track to be provided in parallel form so that each pixel is available at a separate output; a multiplexer (24) to which the output signals of the converter - 5 -130064/0620 -5- 310787Q ■ converter (20) are fed and the cyclically advanced is going to each search pixel group like this many times in a row, as there are tracks on the tape, so that each repeated sequence of the groups of pixels from a line of the image grid with the corresponding repeated sequence of pixel groups from the other Easter lines vertically is aligned. 11. Playback arrangement according to claim 9 for a recording format, in which successive groups of pixels are recorded on separate tracks of the tape so that one another corresponding groups of pixels from adjacent lines of the Image grid lie on separate tracks of the tape, characterized in that the formatting and repeating means for the picture search operation, the groups of pixels recorded on a single track processed and contains the following: a converter (20) to convert the search pixel groups selected for the search mode from the single ones mentioned To provide a track in parallel form so that each pixel is available at a separate output; a first! Multiplexer (24), the output signals from of the converter receives and is updated cyclically, around each search! on pixel group so many times in a row to let through how there are tracks on the tape; a second multiplexer (42) having a single output and a number of inputs equal to the number of tracks which form a series of inputs selected one after the other from a first to a last input, with successive inputs are each connected to one another via a delay element (44) whose delay time equal to the duration of a color subcarrier period is, and where the first input is connected to the output of the first multiplexer, while the second multiplexer - 6 130064/0620 plexer by the horizontal sync signal (over 46) over successive inputs are switched cyclically, so that each line of the picture grid during playback is offset in relation to the neighboring Easter lines and each repeated sequence of a pixel group in a Easter line is aligned diagonally with repeated! Sequences of this pixel group not corresponding Groups of pixels in neighboring Easter lines. - 7-130064/0620